CN210336677U

CN210336677U - Four-station double-color toothbrush forming die

Info

Publication number: CN210336677U
Application number: CN201921125695.0U
Authority: CN
Inventors: 徐国良
Original assignee: Cixi Jingcheng Mould Co ltd
Current assignee: Cixi Jingcheng Mould Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-04-17
Anticipated expiration: 2029-07-18

Abstract

The utility model discloses a four-station double-color toothbrush forming die, which comprises a die holder, wherein the die holder is provided with a positioning module, a first forming module, a cooling module and a second forming module, the die holder is connected with a rotary table, and the rotary table is provided with a rotary shaft; a rotating die assembly is arranged on the rotary table and comprises an upper die block and a lower die block, an upper insert is arranged on the upper die block, a lower insert is arranged on the lower die block, and a through hole is formed between the upper insert and the lower insert; the first-time forming module comprises a first fixed die and a first movable die, and a first cavity is formed between the first fixed die and the second movable die; the second molding die comprises a second fixed die and a second movable die, and a second cavity is formed between the second movable die and the second fixed die. The utility model has the advantages of it is following and effect: the new mechanical structure of this scheme utilization adopts the quadruplex position to fix a position simultaneously, the process of cooling and twice moulding plastics, has the more convenient and higher effect of efficiency of moulding plastics of processing.

Description

Four-station double-color toothbrush forming die

Technical Field

The utility model relates to a mould processing technology field, in particular to quadruplex position double-colored toothbrush forming die.

Background

The double-color mold is a mold which is formed by injecting two plastic materials on the same injection molding machine in two times, but an injected part is only demoulded once. This type of molding process, also known as two-shot molding, is usually accomplished with a single set of molds and requires a special two-shot molding machine.

The existing Chinese patent with publication number CN207889062U discloses a double-color toothbrush rotating shaft forming die, which comprises a fixed die and a movable die, wherein a first forming position and a second forming position are arranged between the fixed die and the movable die; in the first molding position, a first fixed mold core and a first fixed mold molding groove are arranged on the fixed mold, and a first movable mold core and a first movable mold molding groove are arranged on the movable mold; at the second molding position, a second fixed mold core and a second fixed mold molding groove are arranged on the fixed mold, and a second movable mold core and a second movable mold molding groove are arranged on the movable mold; the center of the movable mold is provided with a rotating shaft, a rotary table and a pushing mechanism; the turntable is provided with a first rotary mold core, a first rotary forming groove, a second rotary mold core and a second rotary forming groove; the first movable mold molding groove, the first rotating molding groove and the first fixed mold molding groove are combined into a first mold cavity, and the second movable mold molding groove, the second rotating molding groove and the second fixed mold molding groove are combined into a first mold cavity. When the toothbrush blank injection molding device is used, the movable mold and the fixed mold are assembled, a first movable mold molding groove of a first movable mold core of the movable mold and a first rotating molding groove of a first rotating mold core of the rotary table are opposite to a first fixed mold molding groove of a first fixed mold core of the fixed mold and are synthesized into a first mold cavity, a second movable mold molding groove of a second movable mold core of the movable mold and a second rotating molding groove of a second rotating mold core of the rotary table are opposite to a second fixed mold molding groove of a second fixed mold core of the fixed mold and are synthesized into a second mold cavity, the primary color raw materials are injected into the first mold cavity, so that a toothbrush blank is formed, the bicolor raw materials are injected into the second mold cavity, namely, the bicolor raw materials are injected onto the toothbrush.

However, the double-color toothbrush rotating shaft forming die has the following defects: after injecting moulding the toothbrush rudiment in first die cavity, need cool off, wait for in a period again with the toothbrush rudiment move to the second die cavity, thereby inject the dichromatic raw materials and form the toothbrush finished product on the toothbrush rudiment, so, can't continuously mould plastics waiting for in the cooling process, have the problem that processing is more inconvenient and injection molding efficiency is lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a quadruplex position double-colored toothbrush forming die adopts the mode of quadruplex position to mould plastics double-colored toothbrush, can be with brushing the head and being positioned in the mould and cooling the toothbrush after once moulding plastics when moulding plastics, moulds plastics and cools off in step at different stations, has the processing and more convenient and the higher effect of efficiency of moulding plastics.

The above technical purpose of the present invention can be achieved by the following technical solutions: a four-station double-color toothbrush forming die comprises a die holder, wherein a positioning module, a first forming module, a cooling module and a second forming module are sequentially arranged on the die holder in the circumferential direction, the positioning module and the cooling module are arranged oppositely, the first forming module and the second forming module are arranged oppositely, the center of the die holder is rotatably connected with a rotary table, and a rotary shaft for driving the rotary table to rotate is arranged at the center of the rotary table;

a rotating die assembly is arranged on the rotary table and comprises an upper die block and a lower die block which are oppositely buckled, a plurality of upper inserts are arranged on the upper die block, a plurality of lower inserts corresponding to the upper inserts are arranged on the lower die block, and through holes are formed between the upper inserts and the lower inserts;

the first-time forming module comprises a first fixed die and a first movable die, wherein a first fixed die core is arranged on the first fixed die, and a first fixed die forming groove is formed in the first fixed die core; the first movable die is provided with a first movable die core, the first movable die core is provided with a first movable die forming groove, and a first cavity is formed between the first movable die forming groove and the first fixed die forming groove after the first movable die core is buckled with the first fixed die core;

the second secondary molding module comprises a second fixed die and a second movable die, a second fixed die core is arranged on the second fixed die, and a second fixed die molding groove is formed in the second fixed die core; and a second movable die core is arranged on the second movable die, a second movable die molding groove is formed in the second movable die core, and a second cavity is formed between the second movable die molding groove and the second fixed die molding groove after the second movable die core is buckled with the second fixed die core.

By adopting the technical scheme, in the injection molding process of the toothbrush, firstly, the steel wires for shaping in the toothbrush are placed in the positioning module, the steel wires respectively penetrate through the through holes to be positioned, then the turntable is jacked away from the mold base through external equipment and rotates the rotating shaft, the turntable drives the rotating mold assembly to rotate for 90 degrees, so that the rotating mold assembly rotates to the position above the first molding module and falls to the first fixed mold core of the first molding module, the first movable mold core and the first fixed mold core are matched, the steel wires are respectively positioned in the corresponding first mold cavities, then, injection molding is carried out in the first mold cavity, the brush handle prototypes can be obtained, after mold separation, the turntable is jacked up through the external equipment and rotates the rotating shaft, the turntable drives the rotating mold assembly to rotate for 90 degrees, so that the rotating mold assembly rotates to the cooling module to cool the brush handle prototypes; and jacking the rotary table and rotating the rotary table for 90 degrees to enable the rotary die assembly to rotate to the position above the second forming die and fall to the second fixed die core, closing the second movable die core and the second fixed die core, correspondingly positioning the brush holder rudiment in the second die cavity, performing injection molding in the second die cavity to obtain a toothbrush finished product, jacking the rotary table and rotating the rotary table for 90 degrees to enable the toothbrush finished product to be rotated to the positioning module, and taking out the toothbrush finished product through a manipulator after the upper die block is separated from the lower die block. So, can be fixed a position the steel wire in the mould and cool off the toothbrush after once moulding plastics when moulding plastics, mould plastics, cool off and fix a position in step at different stations, have the effect that processing is more convenient and injection moulding efficiency is higher.

The utility model discloses a further set up to: the rotating die assembly comprises a positioning block, the positioning block is arranged between the upper die block and the lower die block, the lower die block is provided with an embedded groove, the positioning block is embedded in the embedded groove, and the positioning block is provided with a plurality of positioning holes which are arranged corresponding to the through holes; the positioning module comprises a top plate arranged on the die holder and a pushing cylinder for driving the top plate to move, a top rod is arranged on the top plate, a communicating hole for the top rod to pass through is formed in the lower module, and the top rod pushes the positioning block to be far away from the embedded groove.

By adopting the technical scheme, when the toothbrush is initially positioned, the toothbrush head with the bristles penetrates into the positioning hole for positioning, and the steel wire connected with the toothbrush head penetrates through the through hole; when the toothbrush finished product is taken out of the positioning module, the upper module is separated from the lower module, the pushing cylinder is started and jacks up the ejector rod through the top plate, the ejector rod penetrates through the communication hole to jack the positioning block away from the embedded groove, so that the positioning hole drives the toothbrush finished product to be far away from the upper insert and the lower insert, and the toothbrush finished product can be taken out quickly and conveniently through the manipulator.

The utility model discloses a further set up to: the embedded groove is internally provided with a guide post, and the positioning block is provided with a guide hole which is matched with the guide post in a guiding way.

Through adopting above-mentioned technical scheme, under the mating reaction of guide post and guiding hole, the position is difficult for taking place the skew when the inserted groove is kept away from or is lain in the inserted groove again to the locating piece under the promotion of pushing away the cylinder.

The utility model discloses a further set up to: a cushion block is arranged between the top plate and the die holder.

Through adopting above-mentioned technical scheme, set up the cushion between roof and die holder, can reduce the roof to a certain extent and fall back to the produced wearing and tearing of die holder when on the die holder.

The utility model discloses a further set up to: the piston rod of the pushing cylinder is circumferentially provided with an annular groove, the top plate is provided with a U-shaped opening, and the side wall of the U-shaped opening is provided with a lug matched with the annular groove in an embedded mode.

By adopting the technical scheme, when the pushing cylinder is arranged on the die holder, the piston rod of the pushing cylinder slides in along the radial direction to the U-shaped opening, so that the convex block is embedded into the annular groove, and the piston rod of the pushing cylinder can push the top plate to move under the action of the embedding of the convex block and the annular groove.

The utility model discloses a further set up to: the rotary table is in a cross shape, two symmetrical guide rods are arranged on the die holder, and guide holes matched with the guide rods in a guiding mode are formed in the rotary table.

By adopting the technical scheme, when the rotary table rotates and falls onto the die holder, the guide hole of the rotary table is aligned with the guide rod and slides relatively, initial positioning is carried out, and a better guiding effect is achieved.

The utility model discloses a further set up to: the positioning module is provided with a first supporting block.

Through adopting above-mentioned technical scheme, when the toothbrush finished product rotated to the location module along with rotating the mould subassembly on, first supporting block can play the supporting role to the toothbrush finished product, can prevent to a certain extent that the toothbrush finished product of just having moulded plastics the completion from receiving self gravity and taking place deformation.

The utility model discloses a further set up to: the cooling module is provided with a second supporting block.

Through adopting above-mentioned technical scheme, when the toothbrush rudiment rotates to cooling module along with rotating the mould subassembly and cools off, the second supporting shoe can play the supporting role to the toothbrush rudiment, can prevent to a certain extent that the toothbrush finished product of just having moulded plastics the completion from receiving self gravity and taking place deformation.

The utility model discloses a further set up to: the upper die block is provided with double rows of upper inserts, the lower die block is correspondingly provided with double rows of lower inserts, the first molding die group is correspondingly provided with double rows of first cavities, and the second molding die group is correspondingly provided with double rows of second cavities.

Through adopting above-mentioned technical scheme, can carry out two rows simultaneously and mould plastics at the in-process of moulding plastics to improve production efficiency.

To sum up, the utility model discloses following beneficial effect has:

1. the double-color toothbrush is injection molded in a four-station mode, the four stations are respectively and simultaneously subjected to positioning, primary injection molding, cooling and secondary injection molding, the double-color toothbrush has the effects of convenience in processing and high injection molding efficiency, and in addition, the toothbrush blank is cooled between the primary injection molding and the secondary injection molding, so that the time is saved and the secondary injection molding effect is good;

2. the positioning block is adopted to drive the toothbrush finished product to be separated from the upper insert and the lower insert, and then the toothbrush finished product is taken out quickly and conveniently;

3. the first supporting block and the second supporting block are adopted, so that the toothbrush rudiment and the toothbrush finished product can be supported respectively, and the toothbrush rudiment and the toothbrush finished product are not easy to deform.

Drawings

Fig. 1 is a schematic diagram of the overall structural relationship of the embodiment.

Fig. 2 is a schematic view of a connection structure of the turntable and the rotary die assembly according to the embodiment.

Fig. 3 is a schematic structural relationship diagram of a part of the structure of the embodiment in a separated state.

Fig. 4 is a schematic structural relationship diagram of the first movable mold core according to the embodiment.

Fig. 5 is a schematic structural relationship diagram of the rotary die assembly and the positioning module according to the embodiment, wherein the upper die block and the lower die block are in a separated state.

In the figure: 1. a die holder; 11. a guide bar; 2. a positioning module; 21. a top plate; 211. a U-shaped opening; 212. a bump; 22. a push cylinder; 221. an annular groove; 23. cushion blocks; 24. a top rod; 25. a first support block; 3. a first molding module; 31. a first stationary mold; 32. a first movable mold; 33. a first fixed die core; 331. a first fixed die forming groove; 34. a first movable mold core; 341. a first movable die forming groove; 4. a cooling module; 41. a second support block; 5. a second molding module; 51. a second stationary mold; 52. a second movable mold; 53. a second fixed mold core; 531. a second fixed die forming groove; 54. a second movable mold core; 6. a turntable; 61. a rotating shaft; 62. a guide hole; 7. rotating the mold assembly; 71. an upper module; 72. a lower module; 721. a groove is embedded; 722. a communicating hole; 73. mounting an insert; 74. a lower insert; 75. a through hole; 8. positioning blocks; 81. positioning holes; 82. a guide hole; 9. and a guide post.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model provides a quadruplex position double-colored toothbrush forming die, as shown in fig. 1 and fig. 2, including die holder 1, circumference has set gradually location module 2 on the die holder 1, first one shot forming module 3, cooling module 4 and second shot forming module 5, location module 2 sets up with cooling module 4 relatively, first shot forming module 3 sets up with second shot forming module 5 relatively, die holder 1 center is rotated and is connected with criss-cross revolving stage 6, revolving stage 6 center is provided with the pivot 61 that drives revolving stage 6 rotation, be provided with the guide arm 11 of two symmetries on the die holder 1, seted up four on the revolving stage 6 four directions and guide arm 11 direction complex guide hole 62. The external device can jack up the rotary table 6 through the rotating shaft 61 and drive the rotary table 6 to rotate, and the rotation angle of the rotary table 6 in the same direction is 90 degrees each time. When the rotary table 6 falls onto the die holder 1 after rotating, the guide hole 62 of the rotary table 6 aligns with the guide rod 11 and slides relatively to perform initial positioning, and has a better guiding effect.

As shown in fig. 3 and 4, the first molding module 3 includes a first fixed mold 31 and a first movable mold 32, the first fixed mold 31 is fixedly connected to the mold base 1, a first fixed mold core 33 is disposed on the first fixed mold 31, and the first fixed mold core 33 is provided with a first fixed mold molding groove 331; the first movable die 32 is provided with a first movable die core 34, the first movable die core 34 is provided with a first movable die molding groove 341, and when the first movable die core 34 is fastened with the first fixed die core 33, a first cavity is formed between the first movable die molding groove 341 and the first fixed die molding groove 331; the second secondary molding module 5 comprises a second fixed die 51 and a second movable die 52, the second fixed die 51 is fixedly connected to the die holder 1, a second fixed die core 53 is arranged on the second fixed die 51, and a second fixed die molding groove 531 is formed in the second fixed die core 53; the second movable mold 52 is provided with a second movable mold core 54, the second movable mold core 54 is provided with a second movable mold molding groove, and when the second movable mold core 54 is fastened with the second fixed mold core 53, a second cavity is formed between the second movable mold molding groove and the second fixed mold molding groove 531.

As shown in fig. 1, 2 and 5, the cross-shaped turntable 6 is provided with four identical rotating mold assemblies 7, the rotating mold assemblies 7 are located at four ends of the turntable 6, and the four rotating mold assemblies 7 are respectively arranged corresponding to the positioning module 2, the first forming module 3, the cooling module 4 and the second forming module 5. The rotary die assembly 7 comprises an upper die block 71 and a lower die block 72 which are oppositely buckled, wherein the upper die block 71 is provided with a plurality of upper inserts 73, the lower die block 72 is provided with a plurality of lower inserts 74 corresponding to the upper inserts 73, and through holes 75 are formed between the upper inserts 73 and the lower inserts 74; the rotary die assembly 7 further comprises a positioning block 8, the positioning block 8 is arranged between the upper die block 71 and the lower die block 72, the lower die block 72 is upwards provided with an embedded groove 721, the positioning block 8 is embedded in the embedded groove 721, and the positioning block 8 is provided with a plurality of positioning holes 81 which are arranged corresponding to the through holes 75; the positioning module 2 comprises a top plate 21 arranged on the die holder 1 and a pushing cylinder 22 for driving the top plate 21 to move, a cushion block 23 is arranged between the top plate 21 and the die holder 1, and the cushion block 23 is arranged between the top plate 21 and the die holder 1, so that abrasion to the die holder 1 when the top plate 21 falls back to the die holder 1 can be reduced to a certain extent. When the push cylinder 22 is mounted on the die holder 1, the piston rod of the push cylinder 22 slides in the U-shaped opening 211 along the radial direction, so that the protrusion 212 is embedded into the annular groove 221, and the piston rod of the push cylinder 22 can push the top plate 21 to move under the effect of the embedding of the protrusion 212 and the annular groove 221. The top plate 21 is provided with a top rod 24, the lower module 72 is provided with a communication hole 722 through which the top rod 24 passes, the top rod 24 pushes the positioning block 8 to be away from the embedded groove 721, the embedded groove 721 is internally provided with a guide post 9, the positioning block 8 is provided with a guide hole 82 which is matched with the guide post 9 in a guiding way, and under the matching action of the guide post 9 and the guide hole 82, the position of the positioning block 8 is not easy to deviate when being pushed by the pushing cylinder 22 to be away from the embedded groove 721 or being re-positioned in the embedded groove 721.

As shown in fig. 1 and 2, each upper mold block 71 is provided with two rows of upper inserts 73, each lower mold block 72 is correspondingly provided with two rows of lower inserts 74, the first molding module 3 is correspondingly provided with two rows of first cavities, and the second molding module 5 is correspondingly provided with two rows of second cavities, so that two rows of injection molding can be performed simultaneously in the injection molding process, thereby improving the production efficiency. The upper surface of the positioning module 2 is provided with two first supporting blocks 25, the upper surface of the cooling module 4 is provided with two second supporting blocks 41, the upper module 71 and the lower module 72 are corresponding to be annular and hollow all around, so when the rotating module assembly 7 is placed on the positioning module 2 or the cooling module 4, the first supporting blocks 25 and the second supporting blocks 41 can extend into the hollow parts of the upper module 71 and the lower module 72, when a toothbrush finished product rotates to the positioning module 2 along with the rotating module assembly 7, the first supporting blocks 25 can support a toothbrush finished product, when the toothbrush prototype rotates to the cooling module 4 along with the rotating module assembly 7 to be cooled, the second supporting blocks 41 can support the toothbrush prototype, and the toothbrush prototype or the finished product which is just molded by injection can be prevented from bending deformation due to gravity to a certain degree.

The utility model discloses a basic operating principle does: in the injection molding process of the toothbrush, a brush head with bristles on the toothbrush is firstly inserted into the positioning hole 81 for positioning, and a steel wire connected with the brush head passes through the through hole 75; then, the turntable 6 is jacked away from the die holder 1 through external equipment and rotates the rotating shaft 61, the turntable 6 drives the rotating die assembly 7 to rotate 90 degrees clockwise, the rotating die assembly 7 is made to rotate to the position above the first primary forming die set 3 and fall to the first fixed die core 33, the first rotating die core 34 and the first fixed die core 33 are matched, steel wires are respectively located in corresponding first die cavities, then injection molding is carried out in the first die cavity, a brush handle blank can be obtained, the turntable 6 is jacked up through the external equipment after die separation and rotates the rotating shaft 61, the turntable 6 drives the rotating die assembly 7 to rotate 90 degrees clockwise, and the rotating die assembly 7 is made to rotate to the cooling die set 4 to cool the brush handle blank; and then the rotating table 6 is jacked up and rotated 90 degrees clockwise, so that the rotating die assembly 7 rotates to the position above the second secondary forming die set 5 and falls down to the second fixed die core 53, the second movable die core 54 and the second fixed die core 53 are closed, the brush holder rudiment is correspondingly positioned in the second die cavity, injection molding is carried out in the second die cavity, a finished toothbrush product can be obtained, finally the rotating table 6 is jacked up and rotated 90 degrees clockwise, so that the finished toothbrush product is rotated to the positioning die set 2, when the finished toothbrush product is taken out from the positioning die set 2, the upper die block 71 is separated from the lower die block 72, the pushing cylinder 22 is started, the pushing cylinder 22 jacks up the ejector rod 24 through the top plate 21, the ejector rod 24 pushes the positioning block 8 away from the embedded groove 721 after passing through the communication hole 722, so that the positioning hole 81 drives the finished toothbrush product to be far away from the upper insert 73 and the lower insert.

So, four stations are processed simultaneously, can be fixed a position the steel wire in the mould when moulding plastics, still can cool off the toothbrush after once moulding plastics, mould plastics in step, cooling and location at different stations, have the effect that processing is more convenient and injection moulding efficiency is higher, in addition mould plastics for the first time and mould plastics the process for the second time between cooling through the air current toothbrush rudiment, not only save time but also the effect of moulding plastics for the second time is better.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. The utility model provides a quadruplex position double-colored toothbrush forming die, includes die holder (1), its characterized in that: a positioning module (2), a first forming module (3), a cooling module (4) and a second forming module (5) are sequentially arranged on the die holder (1) in the circumferential direction, the positioning module (2) is arranged opposite to the cooling module (4), the first forming module (3) is arranged opposite to the second forming module (5), the center of the die holder (1) is rotatably connected with a rotary table (6), and a rotating shaft (61) for driving the rotary table (6) to rotate is arranged at the center of the rotary table (6);

a rotary die assembly (7) is arranged on the rotary table (6), the rotary die assembly (7) comprises an upper die block (71) and a lower die block (72) which are oppositely buckled, a plurality of upper inserts (73) are arranged on the upper die block (71), a plurality of lower inserts (74) corresponding to the upper inserts (73) are arranged on the lower die block (72), and through holes (75) are formed between the upper inserts (73) and the lower inserts (74);

the first-time forming module (3) comprises a first fixed die (31) and a first movable die (32), a first fixed die core (33) is arranged on the first fixed die (31), and a first fixed die forming groove (331) is formed in the first fixed die core (33); a first moving die core (34) is arranged on the first moving die (32), a first moving die molding groove (341) is formed in the first moving die core (34), and when the first moving die core (34) is buckled with the first moving die core (33), a first cavity is formed between the first moving die molding groove (341) and the first moving die molding groove (331);

the second secondary molding module (5) comprises a second fixed mold (51) and a second movable mold (52), a second fixed mold core (53) is arranged on the second fixed mold (51), and a second fixed mold molding groove (531) is formed in the second fixed mold core (53); the second movable die (52) is provided with a second movable die core (54), the second movable die core (54) is provided with a second movable die molding groove, and after the second movable die core (54) is buckled with the second fixed die core (53), a second cavity is formed between the second movable die molding groove and the second fixed die molding groove (531).

2. The four-station bicolor toothbrush molding die according to claim 1, characterized in that: the rotating die assembly (7) comprises a positioning block (8), the positioning block (8) is arranged between the upper die block (71) and the lower die block (72), the lower die block (72) is provided with an embedded groove (721), the positioning block (8) is embedded in the embedded groove (721), and the positioning block (8) is provided with a plurality of positioning holes (81) which are arranged corresponding to the through holes (75); the positioning module (2) comprises a top plate (21) arranged on the die holder (1) and a pushing cylinder (22) for driving the top plate (21) to move, a top rod (24) is arranged on the top plate (21), a communicating hole (722) for the top rod (24) to pass through is formed in the lower module (72), and the top rod (24) pushes the positioning block (8) to be far away from the embedded groove (721).

3. The four-station bicolor toothbrush molding die according to claim 2, characterized in that: the embedded groove (721) is internally provided with a guide post (9), and the positioning block (8) is provided with a guide hole (82) which is matched with the guide post (9) in a guiding way.

4. The four-station bicolor toothbrush molding die according to claim 2, characterized in that: and a cushion block (23) is arranged between the top plate (21) and the die holder (1).

5. The four-station bicolor toothbrush molding die according to claim 2, characterized in that: annular groove (221) have been seted up to circumference on the piston rod of push cylinder (22), U-shaped opening (211) have been seted up on roof (21), the lateral wall of U-shaped opening (211) be provided with annular groove (221) embedding complex lug (212).

6. The four-station bicolor toothbrush molding die according to claim 1, characterized in that: the rotary table (6) is in a cross shape, two symmetrical guide rods (11) are arranged on the die holder (1), and guide holes (62) matched with the guide rods (11) in a guiding mode are formed in the rotary table (6).

7. The four-station bicolor toothbrush molding die according to claim 1, characterized in that: the positioning module (2) is provided with a first supporting block (25).

8. The four-station bicolor toothbrush molding die according to claim 1, characterized in that: the cooling module (4) is provided with a second supporting block (41).

9. The four-station bicolor toothbrush molding die according to claim 1, characterized in that: go up module (71) and be provided with double upper insert (73), lower module (72) correspond and are provided with double lower insert (74), first one-time forming module (3) corresponds and is provided with double first die cavity, second one-time forming module (5) corresponds and is provided with double second die cavity.