CN216267369U

CN216267369U - Rack type tooth twisting and core withdrawing mold

Info

Publication number: CN216267369U
Application number: CN202122992199.9U
Authority: CN
Inventors: 周寿华; 汪洋; 钟友明
Original assignee: Xiamen Xinhuite Precision Mould Co ltd
Current assignee: Xiamen Xinhuite Precision Mould Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-04-12
Anticipated expiration: 2031-12-01

Abstract

The application discloses rack formula hank tooth moves back mandrel utensil relates to injection mold technical field, including die carrier and demoulding mechanism, be equipped with mould and lower mould that mutually supports the use on the die carrier, it is equipped with the die cavity to go up between mould and the lower mould, demoulding mechanism is including moving back core subassembly and drive assembly, it includes hank tooth axle and first driving piece to move back the core subassembly, first driving piece is located one side of mould, the epaxial cover of hank tooth is equipped with drive gear, drive assembly includes rack and second driving piece, the second driving piece is located one side of lower mould, be equipped with the backup pad on the die carrier, the level is equipped with the spout in the backup pad, the rack slides and sets up in the spout, the tank bottom of spout is equipped with the dog that is used for blocking the rack, the dog is located one side that the second driving piece was kept away from to the backup pad. This application passes through rack drive hank tooth axle and removes, and the dog can block the rack, makes rack movement stroke fixed for the movement stroke of hank tooth axle is fixed.

Description

Rack type tooth twisting and core withdrawing mold

Technical Field

The application relates to the technical field of injection molding, in particular to a rack type thread tooth core withdrawing mold.

Background

Injection molding is a method for producing moldings from industrial products, which generally uses rubber injection molding and plastic injection molding, an injection molding machine is a main molding device for making thermoplastic plastics or thermosetting materials into plastic products with various shapes by using a plastic molding mold, and injection molding is realized by an injection molding machine and a mold.

In the injection molding production, some workpieces with internal threads are produced, a thread-twisting mechanism is generally adopted in the production of the workpieces, one end, with threads, of a thread-twisting shaft is placed in a mold cavity for injection molding, and the thread-twisting shaft is pulled out of the curtain mold cavity after the injection molding is finished.

Generally adopt when hank tooth moves back the core and establish the copper facing at hank tooth epaxial cover, make the copper facing rotate through the motor, but the unable fixed stroke of motor can appear hank tooth axle and remove the stroke difference at every turn, and lead to hank tooth axle not moving back the tooth completely, the unable drawing of patterns of work piece.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that the mobile stroke of the cutter shaft is not fixed and leads to the unable drawing of patterns of work piece, this application provides a rack-type cutter tooth moves back core mould.

The application provides a rack formula hank tooth moves back core mould adopts following technical scheme:

a rack type tooth-twisting core-withdrawing die comprises a die carrier and a demoulding mechanism, wherein an upper die and a lower die which are matched with each other are arranged on the die carrier, a die cavity is arranged between the upper die and the lower die, the demoulding mechanism comprises at least one group of withdrawing core assembly and a transmission assembly, the withdrawing core assembly comprises a tooth-twisting shaft with one end arranged in the die cavity and a first driving piece driving the tooth-twisting shaft to move, the first driving piece is positioned on one side of the upper die, a transmission gear is sleeved on the tooth-twisting shaft, the transmission assembly comprises a rack driving the transmission gear to rotate and a second driving piece driving the rack to move, the rack slides to pass through the lower die, the second driving piece is positioned on one side of the lower die, a support plate is arranged on the die carrier and positioned below the lower die, a sliding groove is horizontally arranged on the support plate, the rack slides to be arranged in the sliding groove, and penetrates through the support plate, the groove bottom of the sliding groove is provided with a stop block used for blocking the rack, and the stop block is positioned on one side, away from the second driving piece, of the supporting plate.

Through adopting above-mentioned technical scheme, open the second driving piece, the second driving piece makes the rack slide in the spout, the rack makes drive gear rotate, drive gear makes the hank tooth axle rotate, the hank tooth axle moves back the tooth from fashioned work piece, the hank tooth axle leaves the work piece under the effect of first driving piece, when the rack contradicts in the dog, the hank tooth axle is accomplished and is moved back the tooth, the dog can control the removal stroke of rack, make the removal formation of rack at every turn the same, make the hank tooth axle can completely move back the tooth at every turn.

Optionally, a main gear used in cooperation with the rack is rotatably disposed in the lower die, the main gear is located below the transmission gear, and the main gear is meshed with the transmission gear.

By adopting the technical scheme, the rack drives the main gear to rotate, the main gear drives the transmission gear to enable the twisted tooth shafts to rotate, and the occupation of space can be reduced while the plurality of twisted tooth shafts can be driven to rotate simultaneously.

Optionally, a pinion is arranged on one side of the main gear, the pinion and the main gear are coaxially arranged, the diameter of the pinion is smaller than that of the main gear, and the rack is meshed with the pinion.

By adopting the technical scheme, the rack drives the pinion to drive the main gear to rotate, the diameter between the pinions is smaller than that of the main gear, the revolution of the main gear can be increased by driving the pinion, the moving stroke of the rack is reduced, the length of the rack can be shortened, and the phenomenon that the occupied space is too large is avoided.

Optionally, the output end of the first driving piece is connected with a sliding block, the hinge shaft is connected with the sliding block, one side, away from the hinge shaft, of the sliding block is provided with a braking block, the braking block is connected with an upper die, and one side, close to the sliding block, of the braking block is provided with an inclined plane inclined towards the lower die.

Through adopting above-mentioned technical scheme, first driving piece drive slider drives the hank tooth axle and removes, can connect many hank tooth axles on the slider, can accomplish the tooth that moves back of many hank tooth axles simultaneously, and tight piece of stopping simultaneously can block the slider, will go up the mould and open the in-process tight piece rebound of stopping, and tight piece of stopping second driving piece can stimulate the slider removal simultaneously when rebound.

Optionally, a clamping groove is formed in the sliding block, the output end of the first driving piece is connected with a clamping block, the clamping block is connected with the clamping groove in a clamped mode, and a movable space is formed between the clamping block and the clamping groove.

Through adopting above-mentioned technical scheme, when drawing of patterns, go up the mould rebound also can start first driving piece, have the space between the cell wall of fixture block and draw-in groove, make one section distance of output idle running of first driving piece, make the slider and stop and pull the slider after appearing one section distance between the tight piece, can avoid the slider and stop the tight piece card extremely.

Optionally, the output end of the first driving piece is connected with the clamping block through threads.

By adopting the technical scheme, the clamping block is convenient to disassemble and assemble

Optionally, one end of the bottom surface of the rack, which is far away from the second driving element, is provided with a moving groove capable of accommodating a stopper, and the stopper is located on a moving path of the moving groove.

By adopting the technical scheme, the moving groove can provide a longer stroke distance for the rack, and the phenomenon that the rack is too long and occupies too large space can be avoided.

Optionally, a clamping plate is arranged on the bottom surface of the rack, a limiting plate is arranged on the groove wall of the sliding groove, and the limiting plate is located above the clamping plate and abuts against the clamping plate.

Through adopting above-mentioned technical scheme, the limiting plate is spacing in the spout with the cardboard, makes the rack only can slide along the spout, can avoid the rack to take place to beat.

In summary, the present application includes at least one of the following advantages: the rack driving gear drives the tooth-twisting shaft to retreat from a formed workpiece, the stop block enables the stroke of the rack to be fixed, the moving distance of the tooth-twisting shaft can be controlled to be the same every time, and the situation that the tooth-twisting shaft does not retreat completely can be avoided.

Drawings

Fig. 1 is a solid view of a rack-type tooth-twisting core-withdrawing mold structure.

Fig. 2 is a structural solid view of a rack-type tooth-twisting core-withdrawing mold.

Fig. 3 is a solid view of a rack-type tooth-twisting core-withdrawing mold structure.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is an enlarged view of a portion B in fig. 2.

Description of reference numerals:

1. a mold frame; 2. a demolding mechanism; 21. withdrawing the core assembly; 211. a thread twisting shaft; 212. a first driving member; 213. a transmission gear; 214. a main gear; 215. a pinion gear; 216. a slider; 217. a brake block; 218. a card slot; 219. a clamping block; 22. a transmission assembly; 221. a rack; 222. a second driving member; 223. a moving groove; 224. clamping a plate; 3. an upper die; 4. a lower die; 41. mounting a plate; 42. an installation table; 5. a mold cavity; 6. a support plate; 61. a chute; 62. a stopper; 63. and a limiting plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses rack formula hank tooth moves back core mould. Referring to fig. 1 and 2, the rack-type tooth-twisting core-stripping die comprises a die carrier 1 and a stripping mechanism 2, wherein an upper die 3 and a lower die 4 which are matched with each other are mounted on the die carrier 1, and a die cavity 5 is arranged between the upper die 3 and the lower die 4. The demolding mechanism 2 includes at least one set of ejector components 21 and a transmission component 22. Two sets of core withdrawing components 21 are provided in this embodiment.

Referring to fig. 2 and 3, the core withdrawing assembly 21 includes a tooth twisting shaft 211 having one end disposed in the mold cavity 5 and a first driving member 212 driving the tooth twisting shaft 211 to move, a mounting plate 41 is mounted on one side of the lower mold 4, the first driving member 212 is mounted on the mounting plate 41, a transmission gear 213 is sleeved on the tooth twisting shaft 211, a main gear 214 is rotatably mounted in the lower mold 4, and the main gear 214 is engaged with the transmission gear 213. The transmission assembly 22 includes a rack 221 for driving the main gear 214 to rotate and a second driving member 222 for driving the rack 221 to move, the rack 221 slides through the lower mold 4, a mounting table 42 is fixed on one side of the lower mold 4, the second driving member 222 is mounted on the mounting table 42, and one end of the rack 221 is slidably mounted in the mounting table 42 and is connected with an output end of the second driving member 222 through a thread. In this embodiment, both the first driving member 212 and the second driving member 222 are oil cylinders, and in other embodiments, both the first driving member 212 and the second driving member 222 may be air cylinders.

The die carrier 1 is provided with a support plate 6, the support plate 6 is positioned below the lower die 4, the support plate 6 is horizontally provided with a sliding groove 61, the rack 221 is arranged in the sliding groove 61 in a sliding manner, the sliding groove 61 penetrates through the support plate 6, a stop block 62 used for stopping the rack 221 is arranged at the bottom of the sliding groove 61, and the stop block 62 is positioned on one side, away from the second driving piece 222, of the support plate 6. When the demoulding is carried out, the second driving piece 222 drives the rack 221 to move in the sliding chute 61, the rack 221 enables the main gear 214 to rotate, the main gear 214 drives the transmission gear 213 to enable the thread twisting shaft 211 to rotate, the thread twisting shaft 211 retreats teeth from a formed workpiece in the rotating process, and meanwhile the first driving piece 212 withdraws the thread twisting shaft 211. The stopper 62 in the slide groove 61 can stop the rack 221, so that the moving distance of the rack 221 is the same each time, the moving distance of the twisted tooth shaft 211 is the same each time, and the situation that the twisted tooth shaft 211 is not completely withdrawn from the workpiece due to different moving distances of the twisted tooth shaft 211 can be avoided.

The auxiliary gear 215 is welded on one side of the main gear 214, the auxiliary gear 215 is coaxially arranged with the main gear 214, the diameter of the auxiliary gear 215 is smaller than that of the main gear 214, the rack 221 is meshed with the auxiliary gear 215, the auxiliary gear 215 with the smaller diameter is driven by the rack 221 to drive the main gear 214 to rotate, the rack 221 moves for the same distance to enable the main gear 214 to rotate, and the phenomenon that the rack 221 is too long and occupies too large space can be avoided.

Referring to fig. 3 and 4, in order to make the moving distance of the rack 221 longer, a moving groove 223 is formed at one end of the bottom surface of the rack 221 away from the second driving member 222, the moving groove 223 can accommodate the stopper 62, and the stopper 62 is located on the moving path of the moving groove 223. When the rack 221 moves on the sliding groove 61, the stopper 62 enters the moving groove 223 when the rack 221 moves to the stopper 62, the rack 221 can further move continuously until the stopper 62 collides with the groove wall of the moving groove 223, so that the rack 221 stops moving, the moving groove 223 can increase the moving distance of the rack 221, and the rack 221 can be prevented from being too long.

In order to prevent the rack 221 from jumping during the moving process, a clamping plate 224 is fixedly arranged on the bottom surface of the rack 221, the clamping plate 224 abuts against the two side groove walls of the sliding groove 61, a limiting plate 63 is arranged on the groove wall of the sliding groove 61, and the limiting plate 63 is located above the clamping plate 224 and abuts against the clamping plate 224. The limit plate 63 abuts against the catch plate 224, so that the rack 221 can only slide along the extending direction of the sliding groove 61, and the rack 221 is prevented from jumping in the moving process.

Referring to fig. 5, the output end of the first driving member 212 is threadedly connected with a fixture block 219, the lower die 4 is slidably mounted with a slider 216, the slider 216 is connected with the thread spindle 211, the slider 216 is provided with a fixture groove 218 in a clamping manner, the fixture block 219 is clamped in the fixture groove 218, and a space is left between the groove wall of the fixture groove 218 and the fixture block 219. The slider 216 can be connected to a plurality of the hinge shafts 211 at the same time, and can pull the first driving member 212 away from the plurality of the hinge shafts 211 at the same time. When the first driving element 212 pulls the sliding block 216, the fixture block 219 moves in the fixture groove 218 to abut against the groove wall of the fixture groove 218, so that the first driving element wire runs for a certain distance without moving the upper mold 3, and the first driving element 212 starts to pull the sliding block 216 to cause the sliding block 216 to be locked.

One side of the sliding block 216 far away from the hinge shaft 211 is provided with a braking block 217, the braking block 217 is connected with the upper die 3, one side of the braking block 217 close to the sliding block 216 is provided with an inclined plane inclined towards the lower die 4, and the sliding block 216 is provided with the same inclined plane. When the upper die 3 moves upwards, the brake block 217 is pulled to move upwards, and meanwhile, the first driving piece 212 can pull the sliding block 216 to move.

The implementation principle of the rack-type thread-twisting and core-withdrawing die is as follows: the upper die 3 is moved upwards to enable the brake block 217 to move upwards, the first driving piece 212 and the second driving piece 222 are started, the second driving piece 222 pushes the rack 221 to slide in the sliding groove 61, the rack 221 drives the main gear 214 to rotate, the main gear 214 drives the transmission gear 213 to rotate the hinge shaft 211, the hinge shaft 211 retreats from a formed workpiece in the rotating process, and the first driving piece 212 pulls the sliding block 216 to enable the hinge shaft 211 to be drawn away from the workpiece.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a rack-type hank tooth moves back core mould, includes die carrier (1) and demoulding mechanism (2), is equipped with last mould (3) and lower mould (4) that mutually support and use on die carrier (1), its characterized in that: the demolding mechanism comprises at least one group of demolding assembly (21) and a transmission assembly (22), wherein the demolding assembly (2) comprises a twisted tooth shaft (211) with one end arranged in the molding cavity (5) and a first driving piece (212) driving the twisted tooth shaft (211) to move, the first driving piece (212) is located on one side of the upper mold (3), a transmission gear (213) is sleeved on the twisted tooth shaft (211), the transmission assembly (22) comprises a rack (221) driving the transmission gear (213) to rotate and a second driving piece (222) driving the rack (221) to move, the rack (221) penetrates through the lower mold (4) in a sliding mode, the second driving piece (222) is located on one side of the lower mold (4), a supporting plate (6) is arranged on the mold base (1), and the supporting plate (6) is located below the lower mold (4), the supporting plate (6) is improved horizontally and is provided with a sliding groove (61), the rack (221) is arranged in the sliding groove (61) in a sliding mode, the sliding groove (61) penetrates through the supporting plate (6), a stop block (62) used for blocking the rack (221) is arranged at the bottom of the sliding groove (61), and the stop block (62) is located on one side, away from the second driving piece (222), of the supporting plate (6).

2. The rack-type thread retracting die of claim 1, wherein: a main gear (214) matched with the rack (221) for use is rotatably arranged in the lower die (4), the main gear (214) is located below the transmission gear (213), and the main gear (214) is meshed with the transmission gear (213).

3. The rack-type thread retracting die of claim 2, wherein: a pinion (215) is arranged on one side of the main gear (214), the pinion (215) and the main gear (214) are coaxially arranged, the diameter of the pinion (215) is smaller than that of the main gear (214), and the rack (221) is meshed with the pinion (215).

4. The rack-type thread retracting die of claim 1, wherein: the output end of the first driving piece (212) is connected with a sliding block (216), the hinge shaft (211) is connected with the sliding block (216), one side, far away from the hinge shaft (211), of the sliding block (216) is provided with a braking block (217), the braking block (217) is connected with the upper die (3), and one side, close to the sliding block (216), of the braking block (217) is provided with an inclined plane inclined towards the lower die (4).

5. The rack-type thread retracting die of claim 4, wherein: the sliding block (216) is provided with a clamping groove (218), the output end of the first driving piece (212) is connected with a clamping block (219), the clamping block (219) is connected with the clamping groove (218), and a movable space is formed between the clamping block (219) and the clamping groove (218).

6. The rack-type thread retracting die of claim 5, wherein: the output end of the first driving piece (212) is connected with the fixture block (219) through threads.

7. The rack-type thread retracting die of claim 1, wherein: one end of the bottom surface of the rack (221), which is far away from the second driving piece (222), is provided with a moving groove (223) capable of accommodating the stop block (62), and the stop block (62) is positioned on the moving path of the moving groove (223).

8. The rack-type thread retracting die of claim 7, wherein: the bottom surface of the rack (221) is provided with a clamping plate (224), the groove wall of the sliding groove (61) is provided with a limiting plate (63), and the limiting plate (63) is located above the clamping plate (224) and abuts against the clamping plate (224).