CN216267370U

CN216267370U - Twisted tooth core withdrawing mold

Info

Publication number: CN216267370U
Application number: CN202122993261.6U
Authority: CN
Inventors: 周寿华; 彭重霄; 陈节盛
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 hank tooth moves back core mould relates to injection mold technical field, including the die carrier, be provided with the front mould in the die carrier, back mould and at least a set of core subassembly that moves back, be equipped with the shaping chamber between front mould and the back mould, move back the first hank tooth axle and the second hank tooth axle that the core subassembly includes horizontal setting, the one end of first hank tooth axle is rotated and is set up in the front mould, first hank tooth axle is equipped with screwed one end and is located the shaping intracavity, the second hank tooth axle is equipped with screwed one end and is located the shaping intracavity, the compression is equipped with first spring between front mould and the back mould, the both ends of first spring are connected with front mould and back mould respectively, one side that the front mould was kept away from to the back mould is equipped with the backup pad, second hank tooth axle rotates with the backup pad to be connected, the backup pad slides and sets up on the die carrier, and the one end and the backup pad of second hank tooth axle are connected, and the compression is equipped with the second spring between backup pad and the back mould. This application can reduce the wearing and tearing of pair hank tooth axle when using the hank tooth to move back the core, and life is longer.

Description

Twisted tooth core withdrawing mold

Technical Field

The application relates to the technical field of injection molds, in particular to a thread-twisting and core-withdrawing mold.

Background

Injection molding is a method of producing a shape for an industrial product, the resulting shape is often the final product, and the final product can be obtained by injection molding, and many details on the product, such as protrusions, ribs, threads, can be formed in one injection molding operation.

In using injection molding processing production, can often produce the work piece that has the internal screw thread, especially both sides all have the internal screw thread work piece, just need use hank tooth mechanism production, will hank tooth mold core insert the one-tenth die cavity, mould plastics, need the drawing of patterns behind the formation work piece, a copper sheathing is established to the cover mostly adoption on hank tooth axle to present current drawing of patterns mode, the inside screw thread that has the cooperation hank tooth to use of copper sheathing, it takes out from the work piece to make hank tooth axle rotate through rotating the copper sheathing when moving back the core.

But the screw thread in the copper sheathing can receive wearing and tearing in long-time use, also can be with the epaxial screw thread wearing and tearing of hank tooth simultaneously, causes the copper sheathing to drive the hank tooth axle and rotate and can't move back the core.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that the copper sheathing makes the hank tooth axle receive wearing and tearing and can't move back the core, this application provides a hank tooth moves back core mould.

The application provides a hank tooth core mould that moves back adopts following technical scheme.

A front die, a rear die and at least one group of withdrawing core assembly are arranged in a die carrier, a forming cavity is arranged between the front die and the rear die, the withdrawing core assembly comprises a first twisting shaft and a second twisting shaft which are transversely arranged, one end of the first twisting shaft is rotatably arranged on the front die, the first twisting shaft is connected with a motor which drives the first twisting shaft to rotate outside the die carrier, one end of the first twisting shaft provided with threads is positioned in the forming cavity, the second twisting shaft is connected with a motor which drives the second twisting shaft to rotate outside the die carrier, one end of the second twisting shaft provided with threads is positioned in the forming cavity, a plurality of first springs are compressed between the front die and the rear die, two ends of the first springs are respectively connected with the front die and the rear die, a supporting plate is arranged on one side of the rear die, which is far away from the front die, and the second twisting shaft is rotatably connected with the supporting plate, the support plate is arranged on the die frame in a sliding mode, a plurality of second springs are arranged between the support plate and the rear die in a compression mode, and two ends of each second spring are connected with the rear die and the support plate respectively.

Through adopting above-mentioned technical scheme, during the drawing of patterns, first hank tooth axle and second hank tooth axle rotate, make first hank tooth axle and second hank tooth axle establish that the screwed one end rotates to take off to the direction removal of keeping away from the molding chamber in following the molding chamber, first hank tooth axle drives the front mould and removes, first spring between front mould and the back mould gives and applys elasticity between front mould and the back mould, can play the effect of auxiliary stay, the pressure of first hank tooth axle is given to the front mould has been reduced, the wearing and tearing that first hank tooth axle received withdrawing the core in-process have been reduced, second hank tooth axle promotes the backup pad and slides on the die carrier, the second spring can reduce the backup pad and to the pressure of second hank tooth axle, reduce the wearing and tearing that second hank tooth axle received at the removal in-process.

Optionally, a moving groove is formed in one side, close to the front mold, of the rear mold, a top plate is arranged in the moving groove in a sliding mode, the top plate is connected with the supporting plate, a space is reserved between the top plate and the bottom of the moving groove, the second hinge tooth shaft penetrates through the top plate, and a limiting block used for limiting the top plate is arranged in the rear mold in a sliding mode.

Through adopting above-mentioned technical scheme, leave the space between the tank bottom of shifting chute and roof, can avoid being died by the card at the first hank tooth axle of tooth in-process that moves back, can't move back the tooth, the stopper can avoid taking place the displacement at the in-process kicking block of moulding plastics in the shifting chute.

Optionally, a braking block is arranged on the front mold, the other end of the braking block penetrates through the limiting block, and an inclined block used for enabling the limiting block to slide is arranged at one end of the braking block penetrating through the limiting block.

Through adopting above-mentioned technical scheme, during the die sinking, the front mould removes and drives and stops tight piece and remove, stops that the sloping block on tight piece makes the stopper remove to the direction of keeping away from the roof, makes the stopper leave the roof for the roof can remove under the drive of second hank tooth axle pair.

Optionally, a bayonet used for clamping the braking block on the limiting block is arranged on the braking block.

Through adopting above-mentioned technical scheme, the bayonet socket on the tight piece of stopping can be spacing on the stopper with the tight piece of stopping, can avoid stopping during tight piece inserts the bayonet socket stopper, causes wearing and tearing to the stopper.

Optionally, a limiting plate is fixedly arranged in the rear mold, a limiting groove is formed in the limiting plate, one end, far away from the top plate, of the limiting plate is arranged in the limiting groove in a sliding mode, and a movable hole for the inclined block to move up and down is formed in the limiting plate.

Through adopting above-mentioned technical scheme, in order to avoid the stopper follow mould roll-off, the limiting plate makes the stopper only can remove in the spacing groove.

Optionally, at least one group of core pulling assemblies are arranged between the front mold and the rear mold, each core pulling assembly comprises a sliding block and a pull rod, the sliding blocks are arranged on the rear mold in a sliding mode, one end of each sliding block is connected with a mold core, one end of each mold core is located in the forming cavity, one end of each pull rod is connected with the front mold, the other end of each pull rod penetrates through the corresponding sliding block, and the pull rods are obliquely arranged in the direction back to the forming cavity.

By adopting the technical scheme, the front mold drives the pull rod to move when moving, the pull rod enables the slide block to move in the rear mold, the mold core on the slide block leaves the molding cavity, and core pulling is completed.

Optionally, one side of the slider, which is far away from the forming cavity, is provided with an inclined plane having the same inclination direction and angle as the pull rod, one side of the slider, which is provided with the inclined plane, is provided with a stop block, the stop block abuts against the slider, and the stop block is connected with the front mold.

Through adopting above-mentioned technical scheme, the dog can avoid the slider from the back mould roll-off mould, can be spacing the slider on the back mould.

Optionally, a first supporting rod is arranged on the front mold, the other end of the first supporting rod penetrates through the rear mold and is slidably arranged on the rear mold, the first supporting rod is sleeved with the first spring, a second supporting rod is fixedly arranged on the supporting plate, the second supporting rod penetrates through the rear mold and is slidably arranged on the rear mold, and the second supporting rod is sleeved with the second spring.

Through adopting above-mentioned technical scheme, the bracing piece can avoid the spring to take place lateral displacement at tensile and compression in-process for the wearing and tearing of spring.

In summary, the present application includes at least one of the following advantages: retreat the tooth through rotating first hank tooth axle and second hank tooth axle, first spring and second spring can play the effect of auxiliary stay simultaneously, can reduce the wearing and tearing that hank tooth axle received in the use.

Drawings

Fig. 1 is a first schematic structural diagram of an embodiment of the present application.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a schematic structural diagram of the second embodiment of the present application.

Fig. 4 is a schematic structural view of the core back assembly.

Description of reference numerals:

1. a mold frame; 2. a front mold; 21. a brake block; 211. a sloping block; 212. a bayonet; 22. a first spring; 23. a first support bar; 3. a rear mold; 31. a moving groove; 32. a top plate; 33. a limiting block; 331. a slide hole; 34. a limiting plate; 341. a limiting groove; 342. a movable hole; 4. withdrawing the core assembly; 41. a first hinge pin; 42. a second hinge pin; 5. a molding cavity; 6. a support plate; 61. a second spring; 62. a second support bar; 7. a core pulling assembly; 71. a slider; 72. a pull rod; 73. a mold core; 74. and a stop block.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses hank tooth moves back core mould. Referring to fig. 1 and 2, a hank tooth moves back core mould, including die carrier 1, install front mould 2 and the back mould 3 that mutually supports the use on the die carrier 1, be provided with between front mould 2 and the back mould 3 and become die cavity 5, still install in the die carrier 1 and move back core subassembly 4, move back core subassembly 4 and include first hank tooth axle 41 and second hank tooth axle 42, first hank tooth axle 41 is equipped with the screwed one end and is located and becomes die cavity 5, the other end rotates and sets up at front mould 2, first hank tooth axle 41 is connected with the first hank tooth axle pivoted motor of die carrier 1 external drive.

The support plate 6 is arranged on the die carrier 1 in a sliding mode, the support plate 6 is located on one side, away from the front die 2, of the rear die 3, the end, provided with the threads, of the second thread twisting shaft 42 is located in the forming cavity 5, the other end of the second thread twisting shaft is rotatably connected with the support plate 6, and the second thread twisting shaft 42 is connected with a motor outside the die carrier 1. The first and

second reamer shafts

41 and 41 rotate under the action of the motor to screw out the end with the thread from the workpiece.

In order to reduce the abrasion of the threads on the first and

second reamer shafts

41 and 42 during use, a plurality of first springs 22 are compressed between the front mold 2 and the rear mold 3, and two ends of the first springs 22 are respectively connected with the front mold 2 and the rear mold 3. The first spring 22 can reduce the pressure of the front die 2 on the first reamer spindle 41, can play a role of auxiliary support, and reduces the abrasion of the first reamer spindle 41 in the using process. A second spring 61 is compressed between the rear die 3 and the support plate 6, and two ends of the second spring 61 are respectively connected with the rear die 3 and the support plate 6. The second spring 61 can reduce the pressure of the support plate 6 on the second reamer spindle 42, so that the auxiliary support function is achieved, and the abrasion of threads of the second reamer spindle 42 in the using process is reduced. In the present embodiment, the number of the first springs 22 and the second springs 61 is four and four, and the number of the first springs 22 and the second springs 61 may be 2 or 3 in other embodiments.

In order to prevent the first spring 22 and the second spring 61 from being displaced laterally during the extension or compression process, the front mold 2 is provided with the first support rod 23, the other end of the first support rod 23 is inserted into the rear mold 3 and is slidably arranged on the rear mold 3, and the first spring 22 is ejected on the first support rod 23. A second support rod 62 is mounted on the support plate 6, the other end of the second support rod 62 is inserted into the rear mold 3 and slidably disposed in the rear mold 3, and a second spring 61 is sleeved on the second support rod 62.

Referring to fig. 1 and 2, in order to reduce the possibility that the second hinge shaft 42 is stuck when moving back the core, a moving groove 31 is formed in one side of the rear mold 3 close to the front mold 2, a top plate 32 is slidably arranged in the moving groove 31, a space is reserved between the top plate 32 and the bottom of the moving groove 31, the second hinge shaft 42 penetrates through the top plate 32, a limit block 33 is slidably arranged in the rear mold 3, and the limit block 33 is inserted into one side of the top plate 32 far away from the molding cavity 5 to limit the top plate 32.

In order to facilitate the sliding of the limit block 33, the front mold 2 is fixedly provided with the brake block 21, one end of the brake block 21, which is far away from the front mold 2, is provided with an inclined block 211 in a direction away from the top plate 32, the limit block 33 is provided with a sliding hole 331 with the same inclination direction and angle as those of the inclined block 211, and the inclined block 211 penetrates through the sliding hole 331. The front die 2 drives the braking block 21 to move, the inclined block 211 enables the limiting block 33 to slide in the rear die 3, and the limiting block 33 can leave the top plate 32.

In order to avoid that the insertion of the brake block 21 into the slide hole 331 causes the inside of the slide hole 331 to be worn, one end of the brake block 21, which is provided with the inclined block 211, is provided with a bayonet 212 for clamping the brake block 21 in the opening of the slide hole 331.

A limiting plate 34 is installed in the rear mold 3, a limiting groove 341 is formed in the limiting plate 34, one end, far away from the top plate 32, of the limiting plate 33 is slidably arranged in the limiting groove 341, and a movable hole 342 for the inclined block 211 to move up and down is formed in the limiting plate 34. The limiting block 33 can prevent the limiting block 33 from sliding off the rear mold 3 in the sliding process of the limiting block 33.

Referring to fig. 3 and 4, a core pulling assembly 7 is further arranged in the mold base 1, the core pulling assembly 7 comprises a sliding block 71 and a pull rod 72, the sliding block 71 is slidably arranged on the rear mold 3, one end of the sliding block 71 is connected with a mold core 73, one end of the mold core 73 is located in the molding cavity 5, one end of the pull rod 72 is connected with the front mold 2, the other end of the pull rod 72 penetrates through the sliding block 71, and the pull rod 72 is obliquely arranged in a direction away from the molding cavity 5. The slide block 71 is pulled by the pull rod 72 to slide the slide block 71 in the rear die 3, so that the die core 73 connected with the slide block 71 can be drawn out from the forming cavity 5, and the core can be synchronously withdrawn with the first and

second hinge shafts

41 and 42.

In order to prevent the sliding block 71 from sliding out of the rear die 3 in the sliding process, the rear die 3 is provided with a stop 74 for stopping the sliding block 71, the stop 74 is connected with the front die 2 and abuts against the sliding block 71, one side of the sliding block 71, which is close to the stop 74, is provided with an inclined surface, and the inclined direction and the angle of the inclined surface are the same as those of the pull rod 72.

The implementation principle of the twisted tooth core-withdrawing die is as follows: the motor drives first hank tooth axle 41 and second hank tooth axle 42 and rotates, and preceding mould 2 removes to drive and stops tight piece 21 and remove, is that stopper 33 leaves roof 32, and second hank tooth axle 42 rotates and promotes backup pad 6 and slide, and first spring 22 and second spring 61 can reduce the wearing and tearing that first hank tooth axle 41 and second hank tooth axle 42 received.

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 hank tooth moves back core mould, includes die carrier (1), is provided with front mould (2), back mould (3) and at least a set of moving back core subassembly (4), its characterized in that in die carrier (1): a forming cavity (5) is arranged between the front die (2) and the rear die (3), the withdrawing component (4) comprises a first twisted tooth shaft (41) and a second twisted tooth shaft (42) which are transversely arranged, one end of the first twisted tooth shaft (41) is rotatably arranged on the front die (2), the first twisted tooth shaft (41) is connected with a motor which drives the first twisted tooth shaft (41) to rotate outside the die carrier (1), one end of the first twisted tooth shaft (41) provided with threads is positioned in the forming cavity (5), the second twisted tooth shaft (42) is connected with a motor which drives the second twisted tooth shaft (42) to rotate outside the die carrier (1), one end of the second twisted tooth shaft (42) provided with threads is positioned in the forming cavity (5), a plurality of first springs (22) are arranged between the front die (2) and the rear die (3) in a compression mode, and two ends of the first springs (22) are respectively connected with the front die (2) and the rear die (3), one side of the rear die (3) far away from the front die (2) is provided with a supporting plate (6), the second hinge shaft (42) is rotatably connected with the supporting plate (6), the supporting plate (6) is slidably arranged on the die carrier (1), a plurality of second springs (61) are compressed between the supporting plate (6) and the rear die (3), and two ends of each second spring (61) are respectively connected with the rear die (3) and the supporting plate (6).

2. The threading die of claim 1, wherein: one side that back mould (3) are close to front mould (2) is equipped with shifting chute (31), it is equipped with roof (32) to slide in shifting chute (31), roof (32) are connected with backup pad (6), leave the space between the tank bottom of roof (32) and shifting chute (31), roof (32) are passed in second hank tooth axle (42), it is used for spacing stopper (33) of roof (32) to slide in back mould (3).

3. The threading die of claim 2, wherein: be equipped with tight piece (21) of stopping on front mould (2), the other end of tight piece (21) of stopping passes stopper (33), the one end that tight piece (21) of stopping passed stopper (33) is equipped with and is used for making gliding sloping block (211) of stopper (33).

4. The threading die of claim 3, wherein: the brake block (21) is provided with a bayonet (212) used for clamping the brake block (21) on the limit block (33).

5. The threading die of claim 4, wherein: a limiting plate (34) is fixedly arranged in the rear die (3), a limiting groove (341) is formed in the limiting plate (34), one end, far away from the top plate (32), of the limiting block (33) is arranged in the limiting groove (341) in a sliding mode, and a movable hole (342) for the inclined block (211) to move up and down is formed in the limiting plate (34).

6. The threading die of claim 1, wherein: be equipped with at least a set of subassembly (7) of loosing core between front mould (2) and back mould (3), it includes slider (71) and pull rod (72) to loose core subassembly (7), slider (71) slide and set up in back mould (3), slider (71) one end is connected with mold core (73), the one end of mold core (73) is located into die cavity (5), the one end and the front mould (2) of pull rod (72) are connected, slider (71) are passed to the other end of pull rod (72), pull rod (72) set up to the slope of separating from die cavity (5) direction dorsad.

7. The threading die of claim 6, wherein: one side of the slider (71) far away from the forming cavity (5) is provided with an inclined plane with the same inclination direction and angle as the pull rod (72), one side of the slider (71) provided with the inclined plane is provided with a stop block (74), the stop block (74) is abutted to the slider (71), and the stop block (74) is connected with the front die (2).

8. The threading die of claim 1, wherein: be equipped with first bracing piece (23) on front mould (2), the other end of first bracing piece (23) passes back mould (3) and slides and set up in back mould (3), first bracing piece (23) are located in first spring (22) cover, second bracing piece (62) have set firmly on backup pad (6), second bracing piece (62) pass back mould (3) and slide and set up in back mould (3), second bracing piece (62) are located in second spring (61) cover.