1. The damping material is characterized by being prepared from the following raw materials in parts by weight: 40-50 parts of natural rubber, 20-30 parts of chlorinated butyl rubber, 10-15 parts of fluororubber, 10-15 parts of carbon black, 1-10 parts of zinc oxide, 1-5 parts of stearic acid, 1-5 parts of an anti-aging agent RD, 10-15 parts of diatomite, 5-10 parts of a silane coupling agent, 8-12 parts of carbon fiber, 10-20 parts of glass fiber, 1-5 parts of microcrystalline wax and 1-3 parts of an accelerator.

2. A shock absorbing material as set forth in claim 1, wherein: the carbon black adopts carbon black N326, the silane coupling agent adopts a silane coupling agent KH560, and the accelerator adopts an accelerator M.

3. A method for manufacturing a cushion using the cushion material of claim 1 or 2, comprising the steps of:

s1, weighing the raw material components according to the weight ratio;

s2, uniformly dispersing carbon fibers, glass fibers, microcrystalline paraffin, carbon black, zinc oxide and diatomite in a silane coupling agent to form a mixed solution;

s3, adding the natural rubber, the chlorinated butyl rubber and the fluororubber into an internal mixer for internal mixing for 10-15 minutes, then adding the mixed solution obtained in the step S2, and uniformly stirring to obtain a required mixed rubber material;

s4, adding the mixed rubber material into an internal mixer, adding stearic acid, an anti-aging agent RD and an accelerator, mixing for 15-25 minutes at the mixing temperature of 100 ℃ and 110 ℃, putting the mixed sheet material into a flat vulcanizing machine for vulcanization molding, and slicing to obtain the primary product of the shock pad;

and S5, feeding the primary product of the shock pad into a punching die, and punching and chamfering to obtain a required shock pad finished product.

4. The method for preparing the shock pad of claim 3 is characterized in that: the punching die comprises an upper die (1), a punch (2), a chamfering mechanism (3), a cooling mechanism (4), a prepressing mechanism (5) and a lower die (6), wherein the punch (2) is symmetrically arranged at the lower end of the upper die (1), the chamfering mechanism (3) is arranged at the lower end of the upper die (1) and is used for chamfering punched through holes, the cooling mechanism (4) is connected with the upper die (1) and is used for cooling a shock pad (1000) and the chamfering mechanism (3), the prepressing mechanism (5) is slidably arranged on the upper die (1) by means of a guide pillar (52) and is used for prepressing a plurality of shock pads (1000) before punching, and the lower die (6) is positioned below the prepressing mechanism (5) and is provided with a plurality of die cavities (61) for placing the shock pads (1000) at the upper end thereof.

5. The method for preparing a cushion according to claim 4, wherein: the chamfering mechanism (3) comprises a base plate (31), sleeves (32), gear rings (33), a tensioning wheel (34), a driving motor (35) and a driving gear (36), the number of the sleeves (32) is consistent with that of the punches (2) and corresponds to the number of the punches (2) one by one, the sleeves (32) are rotatably connected into mounting holes in the base plate (31) by means of bearings (38), the lower end of each sleeve (32) is provided with a truncated cone-shaped chamfering part, the upper end of each sleeve (32) is connected with the gear rings (33), the gear rings (33) are connected through synchronous belts (37), the synchronous belts (37) are further connected to the driving gear (36), the synchronous belts (37) on two sides of the driving gear (36) are tensioned through the tensioning wheel (34), the driving gear (36) is connected to the output end of the driving motor (35), and the driving motor (35) is mounted at the lower end of the upper die (1);

the punch (2) has a section which is located in the sleeve (32) and is in clearance fit therewith.

6. The method for preparing a cushion according to claim 4, wherein: the punch (2) is of a shell structure with an opening at the upper end, and a plurality of cooling holes (21) are formed in the side wall of the lower part of the punch (2);

the cooling mechanism (4) comprises a connecting pipe (41) and an air inlet pipe (42), wherein the two punches (2) are communicated through the connecting pipe (41), and the air inlet pipe (42) is arranged in the middle of the connecting pipe (41) and is communicated with the connecting pipe.

7. The method for preparing a cushion according to claim 4, wherein: the prepressing mechanism (5) comprises a pressing plate (51), a guide post (52), a spring (53) and a nut (54), the pressing plate (51) is connected with the upper die (1) in a sliding mode through the guide post (52) at the upper end of the pressing plate, the upper end of the guide post (52) is connected with the nut (54), the spring (53) is installed on the guide post (52) between the upper die (1) and the pressing plate (51), a guide hole matched with the sleeve (32) is formed in the pressing plate (51), and the inner diameter of the guide hole is larger than the outer diameter of the sleeve (32);

the cooling sleeve (7) can be detachably connected in the guide hole, an annular groove (71) with an opening at the inner ring is arranged in the cooling sleeve (7), an exhaust hole (72) which is obliquely arranged is arranged at the upper end of the annular groove (71), and when the punch (2) is reset to the highest point, the cooling hole (21) on the side wall of the punch (2) is just opposite to the opening of the annular groove (71).

8. The method for preparing a cushion according to claim 4, wherein: : and a discharge hole is also formed in the lower die (6) below the die cavity (61).

Background

The rubber shock pad is widely applied to the fields of machinery, household appliances, automobiles and the like, is the most common auxiliary shock absorption element, has simple structure, easy manufacture and low cost, and can meet most shock absorption requirements. The shock pad used in the field of household appliances at present requires excellent aging resistance and wear resistance, and due to the large demand of the shock pad, the punching of a plurality of single products in the existing punching mode has low production efficiency, chamfering equipment is required to be used for chamfering the mounting holes after punching, the stations of the products are frequently replaced, and the time is long.

Disclosure of Invention

The present invention aims to provide a shock-absorbing material to solve the above-mentioned drawbacks caused by the prior art.

A damping material is prepared from the following raw materials in parts by weight: 40-50 parts of natural rubber, 20-30 parts of chlorinated butyl rubber, 10-15 parts of fluororubber, 10-15 parts of carbon black, 1-10 parts of zinc oxide, 1-5 parts of stearic acid, 1-5 parts of an anti-aging agent RD, 10-15 parts of diatomite, 5-10 parts of a silane coupling agent, 8-12 parts of carbon fiber, 10-20 parts of glass fiber, 1-5 parts of microcrystalline wax and 1-3 parts of an accelerator.

Preferably, the carbon black is carbon black N326, the silane coupling agent is a silane coupling agent KH560, and the accelerator M is used.

The preparation method of the shock pad adopting the shock absorbing material is characterized by comprising the following steps:

s1, weighing the raw material components according to the weight ratio;

s2, uniformly dispersing carbon fibers, glass fibers, microcrystalline paraffin, carbon black, zinc oxide and diatomite in a silane coupling agent to form a mixed solution;

s3, adding the natural rubber, the chlorinated butyl rubber and the fluororubber into an internal mixer for internal mixing for 10-15 minutes, then adding the mixed solution obtained in the step S2, and uniformly stirring to obtain a required mixed rubber material;

s4, adding the mixed rubber material into an internal mixer, adding stearic acid, an anti-aging agent RD and an accelerator, mixing for 15-25 minutes at the mixing temperature of 100 ℃ and 110 ℃, putting the mixed sheet material into a flat vulcanizing machine for vulcanization molding, and slicing to obtain the primary product of the shock pad;

and S5, feeding the primary product of the shock pad into a punching die, and punching and chamfering to obtain a required shock pad finished product.

Preferably, the punching die comprises an upper die, punches, a chamfering mechanism, a cooling mechanism, a prepressing mechanism and a lower die, wherein the punches are symmetrically arranged at the lower end of the upper die, the chamfering mechanism is arranged at the lower end of the upper die and is used for chamfering the punched through hole, the cooling mechanism is connected with the upper die and is used for cooling the shock pads and the chamfering mechanism, the prepressing mechanism is slidably arranged on the upper die by means of guide pillars and is used for prepressing a plurality of shock pads before punching, and the lower die is arranged below the prepressing mechanism and is provided with a plurality of die cavities for placing the shock pads at the upper end thereof.

Preferably, the chamfering mechanism comprises a base plate, a sleeve, gear rings, a tensioning wheel, a driving motor and a driving gear, the number of the sleeve is consistent with that of the punches and corresponds to one another, the sleeve is rotatably connected in a mounting hole in the base plate by virtue of a bearing, a truncated cone-shaped chamfering part is arranged at the lower end of the sleeve, the upper end of the sleeve is connected with the gear rings, the gear rings are connected through synchronous belts, the synchronous belts are also connected to the driving gear, the synchronous belts at two sides of the driving gear are tensioned by virtue of the tensioning wheel, the driving gear is connected to the output end of the driving motor, and the driving motor is arranged at the lower end of the upper die;

the punch is provided with a section which is positioned in the sleeve and is in clearance fit with the sleeve.

Preferably, the punch is of a shell structure with an opening at the upper end, and a plurality of cooling holes are formed in the side wall of the lower part of the punch;

the cooling mechanism comprises a connecting pipe and an air inlet pipe, wherein the two punches are communicated through the connecting pipe, and the air inlet pipe is arranged in the middle of the connecting pipe and communicated with the connecting pipe.

Preferably, the prepressing mechanism comprises a pressing plate, a guide pillar, a spring and a nut, the pressing plate is connected with the upper die in a sliding manner through the guide pillar at the upper end of the pressing plate, the upper end of the guide pillar is connected with the nut, the spring is installed on the guide pillar between the upper die and the pressing plate, a guide hole matched with the sleeve is formed in the pressing plate, and the inner diameter of the guide hole is larger than the outer diameter of the sleeve;

the cooling sleeve can be detachably connected in the guide hole, an annular groove with an opening at the inner ring is arranged in the cooling sleeve, an exhaust hole which is obliquely arranged is arranged at the upper end of the annular groove, and when the punch is reset to the highest point, the cooling hole on the side wall of the punch is just opposite to the opening of the annular groove.

Preferably, a discharge hole is further formed in the lower die below the die cavity.

The invention has the advantages that:

(1) according to the invention, a certain amount of carbon fiber and glass fiber are added into the mixed rubber of natural rubber, chlorinated butyl rubber and fluororubber, so that the binding force among rubbers is enhanced, molecular chains are not easy to break, and the wear resistance of the damping material is improved.

(2) According to the invention, the chamfering mechanism is combined with the punch, so that the punched mounting hole is chamfered while punching is realized, meanwhile, the punching part of the shock pad, the punch and the chamfering part can be cooled by virtue of the punch structure with the heat dissipation structure and the cooling sleeve, and the adverse effect on the shock pad and the parts caused by overhigh temperature in the punching process is reduced.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a front view of the present invention.

Fig. 4 is a sectional view taken along a-a in fig. 3.

Fig. 5 is a schematic structural view of an upper die and a punch part in the present invention.

FIG. 6 is a schematic view of the punch, sleeve and cooling jacket portions.

Fig. 7 is a cross-sectional view of fig. 6.

FIG. 8 is a schematic view of the lower die and the cushion portion of the present invention.

Fig. 9 is a schematic structural view of the cushion.

Wherein:

1 upper die, 2 punch heads, 21 cooling holes, 3 chamfering mechanisms, 31 base plates, 32 sleeves, 33 gear rings, 34 tensioning wheels, 35 driving motors, 36 driving gears, 37 synchronous belts, 38 bearings, 4 cooling mechanisms, 41 connecting pipes, 42 air inlet pipes, 5 prepressing mechanisms, 51 pressing plates, 52 guide pillars, 53 springs, 54 nuts, 6 lower dies, 61 die cavities, 7 cooling sleeves, 71 annular grooves, 72 exhaust holes and 1000 shock pads.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

A damping material is prepared from the following raw materials in parts by weight: 40-50 parts of natural rubber, 20-30 parts of chlorinated butyl rubber, 10-15 parts of fluororubber, 10-15 parts of carbon black, 1-10 parts of zinc oxide, 1-5 parts of stearic acid, 1-5 parts of an anti-aging agent RD, 10-15 parts of diatomite, 5-10 parts of a silane coupling agent, 8-12 parts of carbon fiber, 10-20 parts of glass fiber, 1-5 parts of microcrystalline wax and 1-3 parts of an accelerator.

In this embodiment, carbon black N326 is used as the carbon black, a silane coupling agent KH560 is used as the silane coupling agent, and an accelerator M is used as the accelerator.

As shown in FIG. 1, the preparation method of the shock pad adopting the shock absorbing material is characterized by comprising the following steps:

s1, weighing the raw material components according to the weight ratio;

s2, uniformly dispersing carbon fibers, glass fibers, microcrystalline paraffin, carbon black, zinc oxide and diatomite in a silane coupling agent to form a mixed solution;

s3, adding the natural rubber, the chlorinated butyl rubber and the fluororubber into an internal mixer for internal mixing for 10-15 minutes, then adding the mixed solution obtained in the step S2, and uniformly stirring to obtain a required mixed rubber material;

s4, adding the mixed rubber material into an internal mixer, adding stearic acid, an anti-aging agent RD and an accelerator, mixing for 15-25 minutes at the mixing temperature of 100 ℃ and 110 ℃, putting the mixed sheet material into a flat vulcanizing machine for vulcanization molding, and slicing to obtain the primary product of the shock pad;

and S5, feeding the primary product of the shock pad into a punching die, and punching and chamfering to obtain a required shock pad finished product.

The embodiment also discloses a punching die for punching the shock pad, as shown in fig. 2 to 9, the punching die specifically comprises an upper die 1, a punch 2, a chamfering mechanism 3, a cooling mechanism 4, a pre-pressing mechanism 5 and a lower die 6, wherein the punch 2 is provided with a plurality of punches which are symmetrically arranged at the lower end of the upper die 1, the chamfering mechanism 3 is arranged at the lower end of the upper die 1 and is used for chamfering the punched through hole, the cooling mechanism 4 is connected with the upper die 1 and is used for cooling the shock pad 1000 and the chamfering mechanism 3, the pre-pressing mechanism 5 is slidably arranged on the upper die 1 by means of a guide pillar 52 and is used for pre-pressing the shock pads 1000 before punching, and the lower die 6 is positioned below the pre-pressing mechanism 5 and is provided with a plurality of die cavities 61 for placing the shock pads 1000 at the upper ends thereof.

In this embodiment, the chamfering mechanism 3 includes a base plate 31, sleeves 32, gear rings 33, a tension pulley 34, a driving motor 35 and a driving gear 36, the base plate 31 is connected and fixed with the upper die 1 by means of a connecting column, the number of the sleeves 32 is consistent with the number of the punches 2 and corresponds to one another, the sleeves 32 are rotatably connected in mounting holes on the base plate 31 by means of bearings 38, the lower end of each sleeve 32 is provided with a truncated cone-shaped chamfering part, the outer surface of each chamfering part is of a rough surface structure and is used for polishing, the upper end of each sleeve 32 is connected with the gear rings 33, the gear rings 33 are connected by a synchronous belt 37, the synchronous belt 37 is further connected to the driving gear 36, the synchronous belts 37 on two sides of the driving gear 36 are tensioned by the tension pulley 34, the driving gear 36 is;

the punch 2 has a section which is located within the sleeve 32 and is a clearance fit therewith.

In this embodiment, the punch 2 is a shell structure with an open upper end, and a plurality of cooling holes 21 are formed in the side wall of the lower part of the punch 2;

the cooling mechanism 4 comprises a connecting pipe 41 and an air inlet pipe 42, wherein the two punches 2 are communicated through the connecting pipe 41, and the air inlet pipe 42 is arranged in the middle of the connecting pipe 41 and is communicated with the connecting pipe 41.

In this embodiment, the pre-pressing mechanism 5 includes a pressing plate 51, a guide post 52, a spring 53 and a nut 54, the pressing plate 51 is slidably connected to the upper die 1 through the guide post 52 at the upper end thereof, the nut 54 is connected to the upper end of the guide post 52, the spring 53 is mounted on the guide post 52 between the upper die 1 and the pressing plate 51, a guide hole matched with the sleeve 32 is formed in the pressing plate 51, and the inner diameter of the guide hole is larger than the outer diameter of the sleeve 32;

considering that the chamfer part needs to be cooled after the chamfer of the shock pad 1000 is finished, but the cooling hole 21 can only cool the punch 2 and cannot blow the chamfer part, the cooling sleeve 7 is detachably connected in the guide hole on the press plate 51, the cooling sleeve 7 is internally provided with an annular groove 71 with an opening at the inner ring, the upper end of the annular groove 71 is provided with an exhaust hole 72 which is obliquely arranged, when the punch 2 is reset to the highest point, the cooling hole 21 on the side wall of the punch 2 directly faces the opening of the annular groove 71, high-speed air flow discharged from the cooling hole 21 enters the annular groove 71 and is discharged from the exhaust hole 72, and the air flow discharged from the exhaust hole 72 is just blown to the chamfer part due to the oblique arrangement of the exhaust hole 72, and the chamfer part is cooled by means of the cooling air flow in the punch 2, so that the structural design is simplified. The number of the exhaust holes 72 is plural and is circumferentially arranged on the cooling jacket 7 with the axial center of the cooling jacket 7 as the center.

In this embodiment, a discharge hole is further formed on the lower die 6 below the die cavity 61.

The punching working process of the punching die is as follows:

the shock absorbing pads 1000 are placed in the die cavity 61 of the lower die 6 manually or by means of a manipulator, the air source and the driving motor 35 connected with the air inlet pipe 42 are opened, the upper die 1 moves downwards, the pressing plate 51 is firstly contacted with the lower die 6 and presses the shock absorbing pads 1000, the upper die 1 continues to move downwards until the punch 2 is contacted with the shock absorbing pads 1000 and punches the mounting holes, in the process, the chamfering part rotates and performs chamfering processing on the mounting holes, the punching part of the shock absorbing pads 1000, the punch 2 and the chamfering part can be cooled by means of the cooling holes 21 formed in the side walls of the punch 2 and the cooling sleeves 7 in the guide holes, and adverse effects on the shock absorbing pads 1000 and the parts caused by overhigh temperature in the punching process are reduced.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.