1. The semi-finished product stretching equipment for producing and processing home textile products comprises a rack (1), wherein the rack (1) comprises two L-shaped supports (101) symmetrically arranged on the working ground, a support plate (102) and a connecting column (103) perpendicular to the support plate (102), the L-shaped supports (101) are provided with first lifting mechanisms (3) used for lifting or lowering the support plate (102), the semi-finished product stretching equipment is characterized in that four connecting arms (2) are fixedly arranged on the outer side of the connecting column (103) in an array mode, stretching assemblies (7) and positioning assemblies (9) symmetrically arranged up and down are arranged in the four connecting arms (2), and the stretching assemblies (7) are connected with the positioning assemblies (9) through connecting assemblies (10);

the stretching assembly (7) comprises two stretching mounting plates (701) capable of moving towards or away from each other, stretching contacts (702) are arranged on the stretching mounting plates (701) in an equidistant linear array, and the positioning assembly (9) comprises an upper positioning contact (901) and a lower positioning contact (902) capable of moving towards or away from each other;

the connecting arm (2) is further provided with a torsion translation mechanism (6) for driving the stretching assembly (7) to horizontally move, and when the stretching assembly (7) horizontally moves, the stretched area of the semi-finished product can be always a square-shaped area enclosed by the two assemblies through the positioning assembly (9).

2. The semi-finished product stretching device for producing and processing home textile products according to claim 1, wherein the torsion translation mechanism (6) comprises a C-shaped mounting plate (602), a first driving motor (604), a first screw (605), a guide rod (606), a threaded sleeve (607) and a guide sleeve (608), the first driving motor (604) is fixedly arranged on a groove side wall of the C-shaped mounting plate (602), a driving shaft of the first driving motor (604) penetrates through a side wall of the C-shaped mounting plate (602) and is fixedly connected with the first screw (605), the threaded sleeve (607) is sleeved on the outer side of the first screw (605), and the guide sleeve (608) is slidably sleeved on the outer side of the guide rod (606).

3. The semi-finished product stretching device for producing and processing home textile products according to claim 2, wherein the tail portions of the threaded sleeves (607) and the guide sleeves (608) are fixedly connected with a U-shaped mounting plate (14), a second lifting mechanism (8) used for enabling the two stretching mounting plates (701) to move in the opposite direction or in the reverse direction is arranged on the U-shaped mounting plate (14), the second lifting mechanism (8) comprises a second driving motor (801), a double-headed screw (802) and a sliding rod (803), the side walls of the two stretching mounting plates (701) are in threaded connection with the threaded portions of the double-headed screw (802) respectively, and the sliding rod (803) penetrates through the side walls of the stretching mounting plates (701) and is in sliding connection with the side walls.

4. The semi-finished product stretching device for producing and processing home textile products according to claim 2, wherein a transversely arranged fixing plate (15) is fixedly connected to the lower end of the C-shaped mounting plate (602), a strip-shaped opening (11) parallel to the stretching mounting plate (701) is formed in the side wall of the connecting arm (2) and the fixing plate (15), and a limiting groove (12) is formed in the opposite side wall of the strip-shaped opening (11);

the end parts of the upper positioning contact (901) and the lower positioning contact (902) which are deviated from each other are symmetrically provided with a reset assembly (13), each reset assembly (13) comprises two groups of T-shaped guide rods (1303), a U-shaped frame (1301) and a reset spring (1302), the number of each group of T-shaped guide rods (1303) is two, the T-shaped guide rods (1303) penetrate through the U-shaped frame (1301) and are in sliding connection with the U-shaped frame, the T-shaped guide rods (1303) of each group are respectively and fixedly connected with the end surfaces of the upper positioning contact (901) and the lower positioning contact (902), the two ends of the reset spring (1302) are respectively abutted against the T-shaped guide rods (1303) and the side walls of the U-shaped frame (1301), and the outer side walls of the upper positioning contact (901) and the lower positioning contact (902) are fixedly provided with two symmetrical limiting strips (16);

the top end of the lower positioning contact (902) is provided with an electromagnet (9021), and the lower end part of the upper positioning contact (901) is made of a magnetic material.

5. The semi-finished product stretching device for producing and processing home textile products according to claim 1, wherein the connecting assembly (10) comprises an arc-shaped bump (1001), a connecting rod (1002), a telescopic rod (1005) and a telescopic sleeve (1006), the arc-shaped bump (1001) is fixedly arranged on the side wall of the stretching mounting plate (701), one end of the telescopic rod (1005) is slidably inserted into the telescopic sleeve (1006), the other end of the telescopic rod is fixedly connected with a lantern ring (1004), one end of the connecting rod (1002) is slidably arranged in the lantern ring (1004), the other end of the connecting rod is provided with an arc-shaped groove (1003) matched with the arc-shaped bump (1001), and the outer side of the telescopic rod (1005) is further sleeved with a telescopic spring (1007).

6. The semi-finished product stretching device for producing and processing home textile products according to claim 2, wherein the torsion translation mechanism (6) further comprises a cylinder (601) and a rotating shaft (603), the cylinder (601) is fixedly arranged on the side wall of the connecting arm (2), the rotating shaft (603) penetrates through the whole C-shaped mounting plate (602) and is rotatably connected with the whole C-shaped mounting plate, and the top shaft of the cylinder (601) is rotatably connected with the side wall of the C-shaped mounting plate (602).

7. The semi-finished product stretching device for producing and processing home textile products according to claim 6, wherein a controller (5) is fixedly arranged at the upper end of the supporting plate (102), a control panel (4) is arranged on the working floor close to one side of the L-shaped support (101), and the control panel (4), the controller (5), the first driving motor (604), the second driving motor (801), the electromagnet (9021) and the air cylinder (601) are electrically connected.

8. The semi-finished product stretching device for producing and processing home textile products according to claim 1, wherein a cavity is formed in the lower end of the upper positioning contact (901), a motor base is fixedly arranged on the side wall of the cavity, a micro motor (9011) is fixedly connected to the upper end of the motor base, a driving shaft of the micro motor (9011) penetrates through the side wall of the motor base and is connected with a second screw rod (9013), a nut sleeve (9016) is connected to the outer side of the second screw rod (9013) in a threaded manner, swing rods (9014) are rotatably connected to two sides of the nut sleeve (9016), an L-shaped crochet hook (9015) is rotatably connected to the lower end of the swing rod (9014), a through hole (9012) is formed in the side wall of the cavity of the upper positioning contact (901), and the front end of the L-shaped crochet hook (9015) is located in the through hole (9012) in an initial state.

Background

The textile industry refers to the industry of processing natural fibers and man-made fibers into various yarns, threads, fabrics and dyeing and finishing products. Along with the improvement of the life quality of people, the textile made of high-end silk is particularly favored.

In textile industry, the manufacturing procedure to the fabrics is numerous, the tensile operation of fabrics is one of them important process, in the traditional operation, with the tensile operation of silk, operate through the manual work basically, concrete operation is that four people will wait that tensile silk four corners is held, shake to the four corners and stretch, until the cover on the bed board model, accomplish the tensile of one deck silk fabric promptly, such tensile gimmick can make tensile semi-manufactured goods appear in the middle of thin thick phenomenon all around, thereby lead to whole tensile inhomogeneous, influence the processingquality of follow-up semi-manufactured goods.

Therefore, we propose a semi-finished product stretching device for home textile production and processing to solve the above problems.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides semi-finished product stretching equipment for producing and processing home textile.

In order to achieve the purpose, the invention adopts the following technical scheme:

the semi-finished product stretching equipment for producing and processing home textile products comprises a rack, wherein the rack comprises two L-shaped supports, supporting plates and connecting columns, the two L-shaped supports are symmetrically arranged on the working ground, the connecting columns are perpendicular to the supporting plates, first lifting mechanisms used for lifting or descending the supporting plates are arranged on the L-shaped supports, four connecting arms are arranged on the outer sides of the connecting columns in a fixed array mode, stretching assemblies and positioning assemblies are symmetrically arranged up and down in the four connecting arms, and the stretching assemblies are connected with the positioning assemblies through connecting assemblies;

the stretching assembly comprises two stretching mounting plates capable of moving in opposite directions or in reverse directions, stretching contacts are arranged on the stretching mounting plates in an equidistant linear array, and the positioning assembly comprises an upper positioning contact and a lower positioning contact which can move in opposite directions or in reverse directions;

and when the stretching assembly moves horizontally, the stretched area of the semi-finished product can be always a square-shaped area enclosed by the two assemblies through the positioning assembly.

Preferably, the torsion translation mechanism comprises a C-shaped mounting plate, a first driving motor, a first screw, a guide rod, a threaded sleeve and a guide sleeve, the first driving motor is fixedly arranged on the side wall of the groove of the C-shaped mounting plate, a driving shaft of the first driving motor penetrates through the side wall of the C-shaped mounting plate and is fixedly connected with the first screw, the threaded sleeve is sleeved on the outer side of the first screw, and the guide sleeve is sleeved on the outer side of the guide rod in a sliding manner.

Preferably, the afterbody fixedly connected with U-shaped mounting panel of screw sleeve pipe and guide pin bushing, be provided with the second elevating system who is used for two tensile mounting panels in opposite directions or reverse movement on the U-shaped mounting panel, second elevating system includes second driving motor, double threaded screw and slide bar, two the lateral wall of tensile mounting panel respectively with double threaded screw's screw thread position threaded connection, the slide bar runs through the lateral wall of tensile mounting panel and rather than sliding connection.

Preferably, the lower end of the C-shaped mounting plate is fixedly connected with a transversely arranged fixing plate, the side walls of the connecting arm and the fixing plate are provided with strip-shaped openings parallel to the stretching mounting plate, and the opposite side walls of the strip-shaped openings are provided with limit grooves;

the upper positioning contact and the lower positioning contact are symmetrically provided with reset components at the end parts deviating from each other, each reset component comprises two groups of T-shaped guide rods, a U-shaped frame and a reset spring, the number of the T-shaped guide rods in each group is two, the T-shaped guide rods penetrate through the U-shaped frame and are in sliding connection with the U-shaped frame, the T-shaped guide rods in each group are respectively and fixedly connected with the end surfaces of the upper positioning contact and the lower positioning contact, the two ends of each reset spring are respectively abutted against the T-shaped guide rods and the side wall of the U-shaped frame, and the outer side walls of the upper positioning contact and the lower positioning contact are fixedly provided with two symmetrical limiting strips;

the top end of the lower positioning contact is provided with an electromagnet, and the lower end part of the upper positioning contact is made of a magnetic material.

Preferably, coupling assembling includes arc lug, connecting rod, telescopic link and telescope tube, the arc lug is fixed to be set up on the lateral wall of tensile mounting panel, the one end of telescopic link slides and inserts and establish in the telescope tube, and its other end fixedly connected with lantern ring, the lantern ring is worn to locate by the one end of connecting rod slip, and its other end set up with arc lug assorted arc recess, the outside of telescopic link still is overlapped and is equipped with expanding spring.

Preferably, twist reverse translation mechanism still includes cylinder, pivot, the cylinder is fixed to be set up on the lateral wall of linking arm, the pivot runs through whole C shape mounting panel and rotates rather than being connected, the apical axis of cylinder rotates with the lateral wall of C shape mounting panel to be connected.

Preferably, the upper end of the supporting plate is fixedly provided with a controller, a control panel is arranged on the working ground close to one side of the L-shaped support, and the control panel, the controller, the first driving motor, the second driving motor, the electromagnet and the air cylinder are electrically connected.

Preferably, the cavity has been seted up to the lower extreme of going up the location contact, the fixed motor cabinet that is provided with of lateral wall of cavity, the upper end fixedly connected with micro motor of motor cabinet, and micro motor's drive shaft runs through the lateral wall of motor cabinet and is connected with the second screw rod, the outside threaded connection of second screw rod has the nut cover, and the both sides of nut cover rotate and be connected with the pendulum rod, the lower extreme of pendulum rod rotates and is connected with L shape crochet hook, the cavity lateral wall of going up the location contact runs through and has seted up the through-hole, under the initial condition, the front end of L shape crochet hook is located the through-hole.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the upper positioning contact and the lower positioning contact in the positioning assembly are matched with the stretching contacts in the stretching assembly, so that the upper positioning contact and the lower positioning contact and the stretching contacts in the adjacent positioning assemblies form a zigzag stretching area, and the stretching contacts are pulled by arranging the torsion translation mechanism, so that a semi-finished product in the zigzag area can be precisely stretched, repeated stretching is avoided, and the semi-finished product is not uniformly stretched;

2. according to the invention, the connecting assembly is arranged between the positioning assembly and the stretching assembly, wherein the telescopic rod, the telescopic sleeve and the telescopic spring are arranged in the connecting assembly, so that after the stretching assembly moves the distance between the two limiting grooves, the positioning assembly can automatically reset under the action of the telescopic spring, and the positioning assembly is ensured to be always spaced from the stretching assembly by the two limiting grooves, thereby being free from manual adjustment;

3. according to the invention, the limiting strips are arranged on the side walls of the upper positioning contact and the lower positioning contact, and the plurality of limiting grooves are arranged on the strip-shaped opening of the connecting arm, so that when the upper positioning contact and the lower positioning contact are attracted, the horizontal position of the positioning component is not influenced by the pulling of the stretching component;

4. according to the invention, the micro motor, the threaded sleeve, the swing rod, the L-shaped crochet hook and the like are arranged in the cavity of the upper positioning contact, the L-shaped crochet hook can extend out of the through hole by utilizing the driving of the micro motor, so that the stretched semi-finished product is fixed, and the connecting part of the C-shaped mounting plate can stably rotate by an angle under the matching action of the torsion translation mechanism and the arc-shaped convex block and the arc-shaped groove in the connecting assembly, so that the stacking of the subsequent semi-finished product is facilitated.

Drawings

FIG. 1 is a schematic view of an overall assembly structure of a semi-finished product stretching device for producing and processing home textile products, which is provided by the invention;

FIG. 2 is a schematic structural diagram of a connecting arm of a semi-finished product stretching device for producing and processing home textile products according to the present invention in a front view;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic top view of a connecting arm of a semi-finished product stretching device for manufacturing and processing home textiles according to the present invention;

FIG. 5 is a schematic structural diagram of a connecting assembly of a semi-finished product stretching device for producing and processing home textile according to the present invention;

FIG. 6 is a schematic view of a connection structure of a telescopic assembly and an upper positioning contact of a semi-finished product stretching device for producing and processing home textile articles, which is provided by the invention;

FIG. 7 is a schematic view of a partial explosion structure of a connecting component of a semi-finished product stretching device for manufacturing and processing home textiles according to the present invention;

FIG. 8 is a schematic cross-sectional structural view of an upper positioning contact of a semi-finished product stretching device for manufacturing and processing home textiles according to the present invention;

fig. 9 is an enlarged schematic view of a structure at B in fig. 8.

In the figure: 1. a frame; 101. an L-shaped bracket; 102. a support plate; 103. connecting columns; 2. a connecting arm; 3. a first lifting mechanism; 301. a third drive motor; 302. a third screw; 303. a limiting slide bar; 4. a control panel; 5. a controller; 6. a torsion translation mechanism; 601. a cylinder; 602. a C-shaped mounting plate; 603. a rotating shaft; 604. a first drive motor; 605. a first screw; 606. a guide bar; 607. a threaded bushing; 608. a guide sleeve; 7. a stretching assembly; 701. stretching the mounting plate; 702. stretching the contact; 8. a second lifting mechanism; 801. a second drive motor; 802. a double-ended screw; 803. a slide bar; 9. a positioning assembly; 901. an upper positioning contact; 9011. a micro motor; 9012. a through hole; 9013. a second screw; 9014. a swing rod; 9015. an L-shaped crochet hook; 9016. a nut sleeve; 902. a lower positioning contact; 9021. an electromagnet; 10. a connecting assembly; 1001. an arc-shaped bump; 1002. a connecting rod; 1003. an arc-shaped groove; 1004. a collar; 1005. a telescopic rod; 1006. a telescopic sleeve; 1007. a tension spring; 11. a strip-shaped opening; 12. a limiting groove; 13. a reset assembly; 1301. a U-shaped frame; 1302. a return spring; 1303. a T-shaped guide rod; 14. a U-shaped mounting plate; 15. a fixing plate; 16. and (5) a limiting strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-9, a semi-finished product stretching device for home textile production and processing comprises a frame 1, the frame 1 comprises two L-shaped brackets 101 symmetrically arranged on a working floor, a support plate 102 and a connecting column 103 perpendicular to the support plate 102, a first lifting mechanism 3 for lifting or lowering the support plate 102 is arranged on the L-shaped brackets 101, wherein the first lifting mechanism 3 comprises a third driving motor 301, a third screw 302 and a limit slide bar 303, a driving shaft of the third driving motor 301 penetrates through the side wall of the L-shaped brackets 101 and is fixedly connected with the third screw 302, the limit slide bar 303 is fixedly arranged on the working floor, one end of the limit slide bar penetrates through the side wall of the support plate 102 and is slidably connected with the side wall, the third screw 302 penetrates through the side wall of the support plate 102 and is in threaded connection with the side wall, so as to drive the support plate 102 to move up and down, four connecting arms 2 are fixedly arranged on the outer side of the connecting column 103, the four connecting arms 2 are provided with stretching components 7 and positioning components 9 which are arranged up and down symmetrically, and the stretching components 7 are connected with the positioning components 9 through connecting components 10;

the stretching assembly 7 comprises two stretching mounting plates 701 capable of moving towards or away from each other, the stretching mounting plates 701 are provided with stretching contacts 702 in an equidistant linear array, and the positioning assembly 9 comprises an upper positioning contact 901 and a lower positioning contact 902 capable of moving towards or away from each other;

the connecting arm 2 is also provided with a torsion translation mechanism 6 for driving the stretching component 7 to horizontally move, and when the stretching component 7 horizontally moves, the stretched area of the semi-finished product can be always a rectangular area enclosed by the two components through the positioning component 9.

Specifically, referring to fig. 1 to 3, the torsion translation mechanism 6 includes a C-shaped mounting plate 602, a first driving motor 604, a first screw 605, a guide rod 606, a threaded sleeve 607, and a guide sleeve 608, the first driving motor 604 is fixedly disposed on a side wall of a groove of the C-shaped mounting plate 602, a driving shaft of the first driving motor 604 penetrates through a side wall of the C-shaped mounting plate 602 and is fixedly connected with the first screw 605, the threaded sleeve 607 is sleeved on an outer side of the first screw 605, and the guide sleeve 608 is slidably sleeved on an outer side of the guide rod 606.

In operation, the first driving motor 604 drives the first screw 605 to rotate, and the threaded sleeve 607 is matched with the first screw 605 to convert rotation into linear motion, so that the stretching contact 702 can be controlled to perform directional translation, and stretching translation is performed.

Specifically, referring to fig. 2 to 3, the tail portions of the threaded sleeve 607 and the guide sleeve 608 are fixedly connected to the U-shaped mounting plate 14, the U-shaped mounting plate 14 is provided with a second lifting mechanism 8 for moving the two stretching mounting plates 701 in the opposite directions or in the opposite directions, the second lifting mechanism 8 includes a second driving motor 801, a double-headed screw 802 and a slide bar 803, the side walls of the two stretching mounting plates 701 are respectively in threaded connection with the threaded portion of the double-headed screw 802, and the slide bar 803 penetrates through the side wall of the stretching mounting plate 701 and is in sliding connection with the side wall.

In operation, the double-threaded screw 802 is matched with the stretching mounting plates 701, so that the two stretching mounting plates 701 can move towards or away from each other in the rotation process of the second driving motor 801, and clamping and releasing actions of the stretching contact 702 on the semi-finished product can be completed.

Specifically, referring to fig. 2-6, the lower end of the C-shaped mounting plate 602 is fixedly connected with a fixing plate 15 arranged transversely, the connecting arm 2 and the side wall of the fixing plate 15 are provided with strip-shaped openings 11 parallel to the stretching mounting plate 701, and opposite side walls of the strip-shaped openings 11 are provided with limiting grooves 12;

the end part of the upper positioning contact 901, which is far away from the lower positioning contact 902, is symmetrically provided with a reset assembly 13, the reset assembly 13 comprises two groups of T-shaped guide rods 1303, a U-shaped frame 1301 and a reset spring 1302, the number of each group of T-shaped guide rods 1303 is two, the T-shaped guide rods 1303 penetrate through the U-shaped frame 1301 and are connected with the U-shaped frame 1301 in a sliding manner, the T-shaped guide rods 1303 of each group are respectively fixedly connected with the end faces of the upper positioning contact 901 and the lower positioning contact 902, two ends of the return spring 1302 respectively abut against the T-shaped guide rods 1303 and the side walls of the U-shaped frame 1301, two symmetrical limiting strips 16 are fixedly arranged on the outer side walls of the upper positioning contact 901 and the lower positioning contact 902, it should be noted that, when the upper positioning contact 901 and the lower positioning contact 902 attract each other, the limiting strip 16 is inserted into the limiting groove 12 in a sliding manner, therefore, when the stretching contact 702 stretches outwards, the upper positioning contact 901 and the lower positioning contact 902 cannot move outwards due to the tensile force;

the top end of the lower positioning contact 902 is provided with an electromagnet 9021, and the lower end part of the upper positioning contact 901 is made of a magnetic material.

Specifically, referring to fig. 5, coupling assembling 10 includes arc lug 1001, connecting rod 1002, telescopic link 1005 and telescopic sleeve 1006, arc lug 1001 is fixed to be set up on the lateral wall of tensile mounting panel 701, the one end of telescopic link 1005 is slided and is inserted and establish in telescopic sleeve 1006, and its other end fixedly connected with lantern ring 1004, the lantern ring 1004 is worn to locate in the one end of connecting rod 1002 slides, and its other end seted up with arc lug 1001 assorted arc recess 1003, arc recess 1003 and arc lug 1001 sliding fit in connecting rod 1002, can guarantee to rotate in the follow-up each part that twists reverse translation mechanism 6 drive C shape mounting panel 602, tensile mounting panel 701 can rotate steadily, telescopic spring 1007 still overlaps in the outside of telescopic link 1005.

In operation, the upper positioning contact 901 and the lower positioning contact 902 are vertically moved by the cooperation of the collar 1004 and the connecting rod 1002, and after the extension contact 702 is outwardly extended, the upper positioning contact 901 and the lower positioning contact 902 can automatically reset by the resetting action of the telescopic spring 1007 and keep a distance between the upper positioning contact 901 and the lower positioning contact 902 and the extension contact 702 which is two spacing grooves 12 all the time by setting the telescopic rod 1005, the telescopic sleeve 1006 and the telescopic spring 1007.

Specifically, referring to fig. 2-3, the torsion translation mechanism 6 further includes an air cylinder 601 and a rotating shaft 603, the air cylinder 601 is fixedly disposed on the side wall of the connecting arm 2, the rotating shaft 603 penetrates through the entire C-shaped mounting plate 602 and is rotatably connected therewith, and the top shaft of the air cylinder 601 is rotatably connected with the side wall of the C-shaped mounting plate 602.

In operation, after the whole semi-finished product is stretched, the cylinder 601 is used to rotate the relevant components of the C-shaped mounting plate 602, so as to leave a space for subsequent falling below the semi-finished product where the upper positioning contact 901 is fixed.

Specifically, referring to fig. 1, a controller 5 is fixedly disposed at an upper end of the support plate 102, a control panel 4 is disposed on a working floor on a side close to the L-shaped bracket 101, and the control panel 4, the controller 5, the first driving motor 604, the second driving motor 801, the electromagnet 9021 and the air cylinder 601 are electrically connected.

In operation, each electrical component is controlled through the controller 5, and the overall operation of the equipment can be controlled more accurately through operating the control panel 4, so that errors are avoided.

Specifically, referring to fig. 8 to 9, a cavity is formed at the lower end of the upper positioning contact 901, a motor base is fixedly arranged on the side wall of the cavity, a micro motor 9011 is fixedly connected to the upper end of the motor base, a driving shaft of the micro motor 9011 penetrates through the side wall of the motor base and is connected with a second screw 9013, a nut sleeve 9016 is in threaded connection with the outer side of the second screw 9013, swing rods 9014 are rotatably connected to two sides of the nut sleeve 9016, an L-shaped crochet hook 9015 is rotatably connected to the lower end of the swing rod 9014, a through hole 9012 is formed in the side wall of the cavity of the upper positioning contact 901 in a penetrating manner, and in an initial state, the front end of the L-shaped crochet hook 9015 is located in the through hole 9012, wherein a bed board model is arranged on a working floor right below the connecting column 103 and is provided for placing a subsequent semi-finished product.

In operation, the micro motor 9011 drives the second screw 9013, and meanwhile, as the L-shaped crochet hook 9015 is initially positioned in the through hole 9012, the swing rod 9014 swings along with the nut sleeve 9016 in the process of moving downwards, so that the L-shaped crochet hook 9015 is pushed out of the through hole 9012 and is inserted through the four-corner side walls of the stretched semi-finished product and fixed, and stacking of the subsequently stretched semi-finished product is facilitated.

The working principle is as follows:

a primary stretching stage: firstly, the stretching mounting plate 701 is driven to approach to the middle by the second lifting mechanism 8, so that the stretching contacts 702 vertically clamp the side walls of the semi-finished product, and then the U-shaped mounting plate 14 is pulled by the twisting translation mechanism 6, so that the peripheries of the semi-finished product are preliminarily stretched by 4 opposite stretching contacts 702, wherein the stretching distance is the distance between the corresponding limiting grooves 12;

and (3) stretching and transition stage: in the initial stretching stage, the stretching contact 702 stretches the distance between the two limiting grooves outwards, at this time, the positioning assembly 9 moves a corresponding distance along with the stretching contact, at this time, the electromagnet 9021 is controlled by the controller 5 to be electrified, the upper positioning contact 901 and the lower positioning contact 902 move towards each other and approach each other, so that the upper positioning contact 901 and the lower positioning contact 902 are clamped at the initial position of the stretching contact 702, then the second driving motor 801 rotates reversely to release the stretching contact 702 and is driven by the first driving motor 604 to move the stretching contact 702 outwards again to the distance between the two limiting grooves, at this time, the expansion spring 1007 in the connecting assembly 10 is in a stretching state, then the electromagnet 9021 is powered off, under the action of the reset spring 1302, the upper positioning contact 901 and the lower positioning contact 902 reset reversely, at this time, the limiting function of the limiting strip 16 matched with the limiting groove 12 is lost in the upper positioning contact 901 and the lower positioning contact 902, under the reset action of the extension spring 1007, the upper positioning contact 901 and the lower positioning contact 902 move to the adjacent limiting groove 12;

and (3) stretching: when the electromagnet 9021 is energized, the limiting strips 16 of the upper positioning contact 901 and the lower positioning contact 902 slide in the limiting groove 12, move oppositely and clamp the semi-finished product, the connecting line regions between the upper positioning contact 901, the lower positioning contact 902 and the adjacent tension contact 702 form a zigzag unstretched region, the first driving motor 604 is started to drive the tension contact 702 to stretch the distance between the two limiting grooves 12 outwards, the subsequent operations are the same as above, so that the stretching operation can be carried out on the unstretched area when the stretching assembly 7 and the positioning assembly 9 clamp the semi-finished product each time, the traditional stretching means is avoided, the semi-finished product is thin in the middle and thick at the periphery after being stretched, the phenomenon of different uniformity occurs, and the semi-finished product is stretched by specific tension and stretching distance each time, the uniformity of each region after stretching can be guaranteed to be consistent, uneven force application of manual stretching operation is avoided, and the quality of the semi-finished product formed by stretching is different.

And (3) finishing the stretching: after the stretching of one semi-finished product is completed, the micro motor 9011 is started, the L-shaped crochet hook 9015 gradually moves out of the through hole 9012 and hooks the periphery of the stretched semi-finished product under the threaded fit of the threaded sleeve 9016 and the second screw 9013 along with the swinging of the swinging rod 9014, the C-shaped mounting plate 602 is deflected through the starting cylinder 601 to drive all the components on the U-shaped mounting plate 14 to rotate, the first lifting mechanism 3 is started to move the support plate 102 downward integrally, the L-shaped crochet hook 9015 on the upper positioning contact 901 drives the stretched semi-finished product to move downward to the bed board model, the micro motor 9011 rotates reversely, the L-shaped crochet hook 9015 retracts, and the stretched semi-finished product is laid on the bed board model.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.