1. The utility model provides an injection mold mechanism of loosing core, includes fixed base (1) and footstock (2) that set up, installs cover half (3) on base (1), and the downside movable mounting of footstock (2) has movable mould (4), inlays on the roof of movable mould (4) to have a plurality of plug (7), its characterized in that: the lifting mechanism (6) for controlling the movable die (4) to move up and down is mounted on the top seat (2), each core rod (7) is rotatably mounted on the movable die (4) through a bearing, a plurality of fixed cylinders (8) sleeved at the top ends of the core rods (7) are mounted on the bottom wall of the top seat (2), oblique sliding blocks (15) are arranged on the outer walls of the top ends of the core rods (7), and spiral grooves (16) matched with the oblique sliding blocks (15) are formed in the inner walls of the fixed cylinders (8), so that the core rods (7) rotate when ascending;

water storage chamber (11) have been seted up to the inside of footstock (2), be connected with a plurality of cooling tubes (14) that are located fixed section of thick bamboo (8) on the diapire of footstock (2), every cooling tube (14) all insert and establish in plug (7), be equipped with temperature controller (10) on the diapire of footstock (2), connecting pipe (12) with water storage chamber (11) intercommunication are all installed, two at the both ends of footstock (2) all install solenoid valve (13), two on connecting pipe (12) solenoid valve (13) all with temperature controller (10) electric connection.

2. The injection mold core pulling mechanism of claim 1, wherein: the inclined angle between the inclined slide block (15) and the horizontal plane is alpha: alpha is more than or equal to 60 degrees and less than or equal to 75 degrees.

3. The injection mold core pulling mechanism of claim 1, wherein: elevating system (6) are including drive motor (601) and four rotation cartridge at footstock (2) four corners department of fixed mounting on footstock (2) upper surface actuating lever (5), every equal screw thread cartridge of actuating lever (5) is on movable mould (4), every drive wheel (604) are all installed on the top of actuating lever (5), the last surface rotation of footstock (2) installs four pinion (602), every coaxial arrangement has synchronizing wheel (603) on pinion (602), install the master gear with pinion (602) meshing on the output shaft of drive motor (601), synchronizing wheel (603) and drive wheel (604) pass through the chain belt transmission.

4. The injection mold core pulling mechanism of claim 3, wherein: the output end of the driving motor (601) faces downwards, and four supporting rods are arranged between the bottom wall of the driving motor (601) and the top seat (2) at equal intervals.

5. The injection mold core pulling mechanism of claim 1, wherein: the middle section of the cooling pipe (14) is a corrugated pipe.

6. The injection mold core pulling mechanism of claim 1, wherein: temperature controller (10) are including airtight box (1001) of fixed connection on movable mould (4) diapire, leave the heat transfer plate between airtight box (1001) and water storage chamber (11), connecting cylinder (1002) are installed to the one end of airtight box (1001), piston (1003) have been set to the inside of connecting cylinder (1002), be connected with spring (1004) between the end wall of piston (1003) and connecting cylinder (1002), all be equipped with contact electrode (1005) of mutually supporting on connecting cylinder (1002) and piston (1003).

Background

The core-pulling mechanism is a common mechanism in the die, the core-pulling mechanism moves along with the upper die, positioning or guiding mechanisms such as a guide block and the like are adopted, the core-pulling precision is ensured, and the die space is reduced in order to simplify the die structure. At present, a common core pulling mechanism is driven by an oil cylinder to complete core pulling, and has various structures such as forward core pulling and reverse core pulling, and the reverse core pulling structure occupies a smaller space and has less limitation on the use space of a mold compared with the forward core pulling structure.

In the prior art (publication number: CN106113415B), an injection mold rack core pulling mechanism comprises a large slider slidably connected to a fixed mold and an inclined core pulling column fixed to a movable mold, wherein the large slider is slidably connected to a small slider, the small slider is provided with an inclined hole matched with the inclined core pulling column, a first rack is arranged on the side wall of the large slider, the fixed mold is provided with a rack guide block, the rack guide block is provided with a rack guide groove and a rack guide hole, and the length direction of the rack guide groove is perpendicular to the length direction of the rack guide hole.

In the above-mentioned comparative patent, at least the following problems are not solved:

1. the existing core-pulling injection mold generally performs core pulling from the side edge of the mold, but core pulling is required to be performed from the upper part of the mold when certain specific products are produced, the core-pulling process is complex and tedious, and the production efficiency is influenced;

2. because the raw materials of the injection mold are cooled from a hot melting state to form a final product, the formed part still has higher temperature during demolding, so that a certain adhesion property is formed between the product and the core rod, the hole wall is easily damaged during core pulling, and the product quality is influenced.

Therefore, the injection mold core-pulling mechanism is provided.

Disclosure of Invention

The invention aims to provide an injection mold core pulling mechanism, which realizes the effect of driving a core rod to rotate during demolding through the matching of an inclined slide block on the core rod and a spiral groove in a fixed cylinder, the core rod rotates when moving out of a workpiece hole, so that the adhesion of the workpiece is easier to get rid of, a cooling pipe is inserted into the core rod, the core rod can be rapidly cooled, so that the material around the workpiece hole is rapidly cooled, the adhesion of the workpiece is reduced, the demolding is more convenient, and the demolding efficiency is improved.

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

the utility model provides an injection mold mechanism of loosing core, includes the base and the footstock of fixed setting, installs the cover half on the base, and the downside movable mounting of footstock has the movable mould, installs on the diapire of footstock and penetrates the material pipe, inlays on the roof of movable mould to have a plurality of plug, install the elevating system of control movable mould activity from top to bottom on the footstock, every the plug all rotates through the bearing and installs on the movable mould, install a plurality of covers on the diapire of footstock and establish the solid fixed cylinder on plug top, be equipped with oblique slider on the outer wall on plug top, set up the helicla flute with oblique slider adaptation on the inner wall of solid fixed cylinder for the plug produces the spin movement when rising.

When the driving motor works to drive the movable die to ascend to perform demolding, the core rod gradually goes deep into the fixed cylinder, in the ascending process of the core rod, the inclined sliding block at the top end of the core rod moves upwards under the limitation of the spiral groove, the core rod can rotate, the core rod rotates simultaneously in the ascending process, the core rod breaks away from the adhesion of the wall of the hole of the workpiece and is smoothly moved out of the hole of the workpiece, and the core rod keeps rotating in the process of leaving the hole of the workpiece, so that the outer wall of the core rod can be ground flat even if the wall of the workpiece is subjected to broaching, the damage to the wall of the hole of the workpiece can be effectively reduced by the core rod rotating simultaneously when the workpiece is left, the quality of the workpiece is further improved, and the structure is simple, but is ingenious and practical.

The water storage chamber has been seted up to the inside of footstock, be connected with a plurality of cooling tubes that are located the solid fixed cylinder on the diapire of footstock, every the cooling tube all inserts and establishes in the plug, be equipped with the temperature controller on the diapire of footstock, the connecting pipe with water storage chamber intercommunication is all installed at the both ends of footstock, two all install the solenoid valve on the connecting pipe, two the solenoid valve all with temperature controller electric connection.

With two connecting pipes and municipal water supply pipe network connection, the water of water storage intracavity can flow into in the cooling tube, can cool off the plug, and after the work piece shaping, the plug then can carry out quick cooling to the material around the work piece hole, reduces the adhesion of work piece accuse wall to can the fast demoulding, further improved drawing of patterns efficiency, and can promote product quality. The temperature controller monitors the water temperature in the water storage cavity, when the water temperature is too high, the two electromagnetic valves are opened, water flow enters the water storage cavity, the water temperature in the water storage cavity is balanced, and the water in the cooling pipe keeps a lower temperature, so that a stable cooling effect is kept. When the water temperature in the cooling pipe rises, hot water in the cooling pipe can be in convection with cold water in the water storage cavity, so that the water temperature in the cooling pipe can be basically consistent with that in the water storage cavity, and the control of the water temperature in the cooling pipe can be realized only by adjusting the water temperature in the water storage cavity.

Preferably, the inclined angle between the inclined slide block and the horizontal plane is α: alpha is more than or equal to 60 degrees and less than or equal to 75 degrees.

The proper angle of the inclined slide block is selected to enable the inclined slide block to move smoothly and smoothly in the spiral groove, when the mandrel rises, the mandrel can rotate smoothly due to the cooperation of the inclined slide block and the spiral groove, if the angle of the inclined slide block is small, the mandrel is easy to be blocked when rising, and the effect of rotating the mandrel is difficult to achieve. Therefore, the angle of the inclined slide block can improve the smoothness of the mandrel during the lifting process between an angle of the inclined slide block and an angle of the inclined slide block, and the stability of the equipment during the working process is improved.

Preferably, the lifting mechanism comprises a driving motor fixedly mounted on the upper surface of the top seat and four driving rods rotatably inserted at four corners of the top seat, each driving rod is inserted in a movable die in a threaded manner, a driving wheel is mounted at the top end of each driving rod, four pinions are rotatably mounted on the upper surface of the top seat, each pinion is coaxially mounted with a synchronizing wheel, a main gear meshed with the pinions is mounted on an output shaft of the driving motor, and the synchronizing wheels and the driving wheels are driven by chain belts.

When the driving motor works, the main gear drives the auxiliary gear to rotate, the synchronizing wheel on the auxiliary gear drives the driving wheel to rotate through the chain belt, so that each driving rod rotates along with the driving rod, and the four driving rods rotate simultaneously to drive the movable die to move upwards or downwards due to the fact that the driving rods are in threaded connection with the movable die, and accordingly lifting control over the movable die is achieved. And during die assembly, the driving motor is controlled to move the movable die downwards, and during demolding, the driving motor is controlled to rotate reversely to lift the movable die and drive the core rod to be separated from the workpiece. The control technology for the motor is widely applied at the present stage, and is not described herein. Thereby only need a motor can drive four drive wheels simultaneously and rotate and realize the lift control to the movable mould, follow the activity of four corners simultaneous control movable mould, more stable when the movable mould goes up and down.

Preferably, the output end of the driving motor faces downwards, and four supporting rods are arranged between the bottom wall of the driving motor and the top seat at equal intervals.

The supporting rods arranged at four equal distances lift up the driving motor, and an installation space is reserved below the driving motor, so that four pinion homoenergetic gears and the main gear are meshed in the interval of the supporting rods, synchronous driving of four driving rods is realized, equipment requirements are reduced, and only one motor is needed to drive the four driving rods to rotate, so that the driving device is ingenious and practical.

Preferably, the middle section of the cooling pipe is a corrugated pipe.

The setting of bellows makes the cooling tube can contract, and when the plug rose, the plug can extrude the cooling tube, and the cooling tube is then followed the shrink to water in the cooling tube has partly discharge to the water storage intracavity, makes the temperature in the cooling tube keep the equilibrium with the temperature in the water storage intracavity fast. The cooling effect of the cooling pipe is guaranteed, the stability in the demolding process is improved, and the cooling pipe is prevented from blocking the demolding process.

Preferably, the temperature controller includes the airtight box of fixed connection on the movable mould diapire, leave the heat transfer plate between airtight box and the water storage chamber, the connecting cylinder is installed to the one end of airtight box, the inside of connecting cylinder has set the piston, be connected with the spring between the end wall of piston and connecting cylinder, all be equipped with the contact electrode of mutually supporting on connecting cylinder and the piston.

When the water temperature in the water storage cavity rises, the temperature in the closed box rises along with the rise, the air pressure in the closed box rises, the air pressure is transmitted to the piston to generate pressure on the piston, the pressure acts on the spring to compress the spring, the higher the water temperature in the water storage cavity is, the greater the pressure in the closed box is, the greater the contraction quantity of the spring is, when the temperature in the water storage cavity reaches a certain value, the numerical value can be set according to the stiffness coefficient of the spring, the piston moves outwards to enable the two contact electrodes to be in contact, and therefore the two electromagnetic valves are opened to enable external water to enter the water storage cavity and take away water with higher temperature in the water storage cavity. The temperature controller converts the water temperature change into the air pressure change and converts the air pressure change into the movement of the piston, thereby realizing the monitoring of the temperature, realizing the automatic control of the water changing operation, being ingenious and convenient, and improving the convenience in use.

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

1. the invention realizes the effect of driving the core rod to rotate during demoulding through the matching of the inclined slide block on the core rod and the spiral groove in the fixed cylinder, and the core rod rotates when moving out of the workpiece hole, thereby being easier to get rid of the adhesion of the workpiece, improving the smoothness during demoulding and being beneficial to improving the quality of the workpiece.

2. According to the invention, the cooling pipe is inserted in the core rod, so that the core rod can be rapidly cooled, the material around the workpiece hole can be rapidly cooled, the adhesion of the workpiece is reduced, the demolding is more convenient, and the demolding efficiency is further improved.

3. The temperature of water storage intracavity is experienced through the temperature controller to turn into the change of atmospheric pressure with temperature variation, with the switching of two connecting pipes of this control, change and cool down the water of water storage intracavity, ensure that the cooling tube keeps stable cooling effect, further improved the stability of equipment during operation.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a side cross-sectional view of the top mount of the present invention;

FIG. 5 is a schematic structural view of a fixed cylinder of the present invention;

FIG. 6 is an enlarged view of the structure at A of the present invention;

fig. 7 is an enlarged view of the structure at B of the present invention.

In the figure: 1. a base; 2. a top seat; 3. fixing a mold; 4. moving the mold; 5. a drive rod; 6. a lifting mechanism; 601. a drive motor; 602. a pinion gear; 603. a synchronizing wheel; 604. a drive wheel; 7. a core rod; 8. a fixed cylinder; 9. injecting a material pipe; 10. a temperature controller; 1001. a sealed box; 1002. a connecting cylinder; 1003. a piston; 1004. a spring; 1005. a contact electrode; 11. a water storage cavity; 12. a connecting pipe; 13. an electromagnetic valve; 14. a cooling tube; 15. an inclined slide block; 16. a helical groove.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of 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 considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 7, the present invention provides a core pulling mechanism for an injection mold, which has the following technical scheme:

the utility model provides an injection mold mechanism of loosing core, includes fixed base 1 and footstock 2 that sets up, installs cover half 3 on the base 1, and the downside movable mounting of footstock 2 has movable mould 4, installs on the diapire of footstock 2 and penetrates material pipe 9, and detachably connects the gate department on movable mould 4, inlays on the roof of movable mould 4 and has a plurality of plug 7, installs the elevating system 6 of control movable mould 4 activity from top to bottom on the footstock 2. The core rod 7 is positioned above the movable die 4, and after the molding is completed, the core rod 7 is taken out of the workpiece upward following the movable die 4.

Referring to fig. 1 and 2, as an embodiment of the present invention, the lifting mechanism 6 includes a driving motor 601 fixedly installed on the upper surface of the top base 2 and four driving rods 5 rotatably inserted into four corners of the top base 2, each driving rod 5 is threadedly inserted into the movable mold 4, a driving wheel 604 is installed at the top end of each driving rod 5, four pinions 602 are rotatably installed on the upper surface of the top base 2, a synchronizing wheel 603 is coaxially installed on each pinion 602, a main gear meshed with the pinions 602 is installed on the output shaft of the driving motor 601, and the synchronizing wheel 603 and the driving wheel 604 are driven by a chain belt.

When the driving motor 601 works, the main gear drives the secondary gear 602 to rotate, the synchronizing wheel 603 on the secondary gear 602 drives the driving wheel 604 to rotate through the chain belt, so that each driving rod 5 rotates along with the driving rod 5, and because the driving rods 5 are in threaded connection with the movable mold 4, the four driving rods 5 rotate simultaneously to drive the movable mold 4 to move upwards or downwards, thereby realizing the lifting control of the movable mold 4. When the mold is closed, the driving motor 601 is controlled to move the movable mold 4 downwards, and when the mold is released, the driving motor 601 is controlled to rotate reversely to lift the movable mold 4, so that the core rod 7 is driven to be separated from the workpiece. The control technology for the motor is widely applied at the present stage, and is not described herein. Thereby only need a motor can drive four drive wheels 604 simultaneously and rotate and realize the lift control to movable mould 4, from the activity of four corners simultaneous control movable mould 4, more stable when movable mould 4 goes up and down.

Referring to fig. 2, an output end of a driving motor 601 faces downward, and four support rods are installed between a bottom wall of the driving motor 601 and the top base 2 at equal intervals.

The driving motor 601 is lifted up through the four support rods arranged equidistantly, the installation space is reserved below the driving motor 601, the four pinion gears 602 can be meshed with the main gear in the interval of the support rods, synchronous driving of the four driving rods 5 is achieved, equipment requirements are reduced, and only one motor is needed to drive the four driving rods 5 to rotate simultaneously, so that the driving device is ingenious and practical.

Every plug 7 all rotates through the bearing and installs on movable mould 4, installs a plurality of covers on the diapire of footstock 2 and establishes the solid fixed cylinder 8 at plug 7 top, is equipped with oblique slider 15 on the outer wall at plug 7 top, offers the helicla flute 16 with oblique slider 15 adaptation on the inner wall of solid fixed cylinder 8 for plug 7 produces the rotation action when rising.

When the driving motor 601 works to drive the movable die 4 to ascend for demolding, the core rod 7 gradually penetrates into the fixed cylinder 8, in the ascending process of the core rod 7, the inclined slide block 15 at the top end of the core rod 7 spirally moves upwards under the limitation of the spiral groove 16, the core rod 7 can rotate simultaneously in the ascending process, the core rod 7 is free from adhesion of the hole wall of the workpiece and can smoothly move out of the hole of the workpiece, and the core rod 7 keeps rotating in the process of leaving the hole of the workpiece, so that even if the hole wall of the workpiece is subjected to broaching, the outer wall of the core rod 7 can be ground flat, the damage to the hole wall of the workpiece can be effectively reduced by the core rod 7 rotating simultaneously when leaving the workpiece, the quality of the workpiece is improved, and the structure is simple, ingenious and practical.

As an embodiment of the present invention, referring to fig. 6, the inclination angle of the inclined slider 15 to the horizontal plane is α: alpha is more than or equal to 60 degrees and less than or equal to 75 degrees, and the inclination angle of the spiral groove 16 is correspondingly changed along with the inclined slide block 15.

The angle of the inclined slider 15 is selected to be appropriate so that the inclined slider can smoothly and smoothly move in the spiral groove 16, when the mandrel 7 ascends, the mandrel 7 can smoothly rotate due to the cooperation of the inclined slider 15 and the spiral groove 16, and when the angle of the inclined slider 15 is small, the mandrel 7 is easily locked when ascending, and the effect of rotating the mandrel 7 is difficult to achieve. Therefore, the angle of the inclined slide block 15 is 60-75 degrees, so that the smoothness of the mandrel 7 during lifting can be improved, and the stability of the equipment during working is improved.

The water storage chamber 11 has been seted up to the inside of footstock 2, is connected with a plurality of cooling tubes 14 that are located a fixed section of thick bamboo 8 on the diapire of footstock 2, and every cooling tube 14 all inserts and establishes in plug 7, is equipped with temperature controller 10 on the diapire of footstock 2, and connecting pipe 12 with 11 intercommunications in water storage chamber is all installed at the both ends of footstock 2, all installs solenoid valve 13 on two connecting pipes 12, and two solenoid valves 13 all with 10 electric connection of temperature controller.

With two connecting pipes 12 and municipal water supply pipe network connection, the water in the water storage chamber 11 can flow into in the cooling tube 14, can cool off plug 7, and after the work piece shaping, plug 7 then can cool off fast to the material around the work piece hole, reduces the adhesion of work piece accuse wall to can the fast demoulding, further improved drawing of patterns efficiency, and can promote product quality. The temperature controller 10 monitors the water temperature in the water storage cavity 11, when the water temperature is too high, the two electromagnetic valves 13 are opened, so that water flows into the water storage cavity 11, the water temperature in the water storage cavity 11 is balanced, the water in the cooling pipe 14 is kept at a lower temperature, and a stable cooling effect is kept. When the temperature of the water in the cooling pipe 14 rises, hot water in the cooling pipe 14 and cold water in the water storage cavity 11 are in convection, so that the temperature of the water in the cooling pipe 14 can be basically consistent with that of the water in the water storage cavity 11, and the control of the temperature of the water in the cooling pipe 14 can be realized only by adjusting the temperature of the water in the water storage cavity 11.

Referring to fig. 2, as an embodiment of the present invention, the middle section of the cooling pipe 14 is a corrugated pipe.

The arrangement of the corrugated pipe enables the cooling pipe 14 to contract, when the core rod 7 ascends, the core rod 7 extrudes the cooling pipe 14, the cooling pipe 14 contracts along with the core rod, and a part of water in the cooling pipe 14 is discharged into the water storage cavity 11, so that the temperature in the cooling pipe 14 is rapidly balanced with the temperature of water in the water storage cavity 11. Not only ensures the cooling effect of the cooling pipe 14, but also improves the stability during demoulding, and avoids the cooling pipe 14 from obstructing the demoulding process.

Referring to fig. 4, in an embodiment of the present invention, a temperature controller 10 includes a sealing box 1001 fixedly connected to a bottom wall of a movable mold 4, a heat transfer plate is left between the sealing box 1001 and a water storage chamber 11, a space in the sealing box 1001 extends to the movable mold 4, and is separated from the water storage chamber 11 by only one heat transfer plate, so that a temperature in the water storage chamber 11 can be quickly transferred to the sealing box 1001, and a temperature detection effect is ensured. A connecting cylinder 1002 is attached to one end of a sealed case 1001, a piston 1003 is disposed in the connecting cylinder 1002, a spring 1004 is connected between the piston 1003 and an end wall of the connecting cylinder 1002, and contact electrodes 1005 that are engaged with each other are provided on both the connecting cylinder 1002 and the piston 1003.

When the temperature in the water storage cavity 11 rises, the temperature in the sealed box 1001 rises along with the rise, the air pressure in the sealed box 1001 rises, the air pressure is transmitted to the piston 1003 to generate pressure on the piston 1003, the pressure is applied to the spring 1004 to compress the spring, the higher the temperature in the water storage cavity 11 is, the higher the pressure in the sealed box 1001 is, the larger the shrinkage of the spring 1004 is, when the temperature in the water storage cavity 11 reaches a certain value (the value can be set according to the stiffness coefficient of the spring 1004), the piston 1003 moves outwards to enable the two contact electrodes 1005 to be in contact, so that the two electromagnetic valves 13 are opened to enable the outside water flow to enter the water storage cavity 11, and the water body with the higher temperature in the water storage cavity 11 is taken away. The temperature controller 10 converts the water temperature change into the air pressure change and converts the air pressure change into the movement of the piston 1003, thereby realizing the monitoring of the temperature, realizing the automatic control of the water changing operation, being ingenious and convenient, and improving the convenience in use.

The working principle is as follows: the driving motor 601 rotates forward or reversely to drive the four driving rods 5 to rotate, so as to drive the movable die 4 to ascend or descend, when the movable die 4 ascends for demolding, the core rod 7 gradually penetrates into the fixed cylinder 8, in the ascending process of the core rod 7, the inclined slide block 15 at the top end of the core rod 7 spirally moves upwards under the limitation of the spiral groove 16, and as the core rod 7 can rotate, the core rod 7 rotates simultaneously in the ascending process, and the core rod 7 is free from the adhesion of the wall of the hole of the workpiece and can be smoothly moved out of the hole of the workpiece. With two connecting pipes 12 and municipal water supply pipe network connection, the water in the water storage chamber 11 can flow into in the cooling tube 14, can cool off plug 7, and after the work piece shaping, plug 7 then can cool off fast to the material around the work piece hole, reduces the adhesion of work piece accuse wall to can the fast demoulding, further improved drawing of patterns efficiency. The temperature controller 10 monitors the water temperature in the water storage cavity 11, when the water temperature is too high, the two electromagnetic valves 13 are opened, so that water flows into the water storage cavity 11, the water temperature in the water storage cavity 11 is balanced, the water in the cooling pipe 14 is kept at a lower temperature, and a stable cooling effect is kept.

The electric elements in the document are electrically connected with an external main controller and 220V mains supply through a transformer, the main controller can be a conventional known device controlled by a computer and the like, the product model provided by the invention is only used according to the structural characteristics of the product, the product can be adjusted and modified after being purchased, so that the product is more matched with and accords with the technical scheme of the invention, the product model is a technical scheme of the optimal application of the technical scheme, the product model can be replaced and modified according to the required technical parameters, and the product model is familiar to the technical personnel in the field, so that the technical scheme provided by the invention can clearly obtain the corresponding use effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.