CN217777569U - Double-color double-mold structure - Google Patents

Abstract

The utility model relates to a double-color double-mold structure, which is used for solving the problem that the water gap part of the existing double-color mold is obvious; the first rotationally symmetrical mold and the second rotationally symmetrical mold are respectively arranged on the turntable, so that secondary injection molding of a product is realized; through the last end at ejector pin be provided with the secondary of product mould plastics the corresponding intercommunication of position lead to groove four and the interior injection moulding passageway of the through-hole of reserving on injection moulding's the product, realize carrying out the secondary from the product inboard and mould plastics to the product, make the mouth of a river also can stay the inboard, guarantee that the outside of product is level and smooth.

Description

Double-color double-mold structure

Technical Field

The utility model relates to an injection mold neighborhood especially relates to a double-colored bimodulus structure.

Background

The two-color mold refers to a mold in which two plastic materials are injection-molded on the same injection molding machine in two times and are only ejected once, and this molding process is also called two-material injection molding. A two-color mold generally includes two chambers, a front mold and a rear mold, wherein the front mold and the rear mold can rotate around a set portion; after the front die and the rear die complete rotation, the conversion of the front die and the rear die to injection molding ports made of different materials is realized. The demolding product of the double-color mold is usually the composite molding of hard glue and soft glue, the hard glue molding is generally completed by one-time injection molding, and the injection molding of the soft glue part is completed by two-time injection molding on the basis of the hard glue product; in order to ensure the adhesion effect between the hard glue product and the soft glue part, a recessed structure and/or a hole site is usually reserved at the position of the soft glue part on the hard glue product.

In the existing double-color mold, the water inlet of the secondary injection molding is usually positioned at the outer side of the primary injection molding product and is opposite to the part needing to complete the secondary injection molding. In the traditional double-color mold, because the outer side is used for injection molding, inward pressure can be generated on a product in the injection molding process and after the injection molding is finished, and the product is not easy to demould; on the other hand, due to the structures such as hole sites reserved on the primary injection molding product, more overflow edges can be generated, the cleaning is difficult, and the demolding process is further hindered; the water gap formed by the final secondary injection molding is also positioned on the outer side of the product, so that the appearance of the product is influenced. There is a need for a two color dual mold structure that is easy to demold and has no flash.

Disclosure of Invention

The utility model aims at solving the defects of the prior art and providing a double-color double-mold structure.

In order to solve the above problem, the utility model adopts the following scheme:

a double-color double-mold structure comprises a first mold, a second mold and a turntable; the first die and the second die are both arranged on the same side of the turntable; the positions of the first mold and the second mold on the turntable are rotationally symmetrical about the circle center of the turntable; a first mold core and a second mold core are arranged between a first upper mold and a first lower mold in the first mold; a third mold core and a fourth mold core are arranged between the upper mold II and the lower mold II in the second mold; an inner injection thimble corresponding to the secondary injection part of the product is arranged on the first mold core and the second mold core in the first mold; a fourth through groove for injection molding is formed in the upper surfaces of the third core insert in the third core insert and the fourth core insert in the fourth core insert; the through groove IV comprises an inner injection hole which penetrates through the third core insert or the fourth core insert and is connected with an ejector rod in the third core insert or the fourth core insert; the upper end of the ejector rod is made of elastomer materials, an inner injection channel corresponding to the secondary injection part of the product is arranged at the upper end of the ejector rod, one end of the inner injection channel is connected with the inner injection hole, and the other end of the inner injection channel corresponds to the positions of the inner injection ejector pins in the first die core and the second die core.

Furthermore, an upper die I in the first die comprises an upper fixing plate I, a first female die plate, a first sprue bush and a first positioning ring, and the upper fixing plate I is connected with the first female die plate through a first guide pillar; the first mother template comprises a first upper mother plate and a first lower mother plate, and the first upper mother plate is arranged above the first lower mother plate; the upper surface of the first lower mother board is provided with a first through groove for injection molding, and the first through groove is respectively connected with a second through groove arranged on the upper surfaces of the first mold core and the second mold core; the first sprue bush is arranged on the first upper fixing plate and connected with the first through groove on the first lower mother plate; the upper fixing plate I is also provided with a positioning ring I for connecting the sprue bush I and an external injection molding pipeline; the first die core comprises a first female die core arranged on the upper die I and a first male die core arranged on the lower die I; the second die core comprises a second female die core arranged on the first upper die and a second male die core arranged on the first lower die.

Furthermore, the first guide post sequentially penetrates through the first upper mother board and the first lower mother board from top to bottom, and a first step corresponding to the first upper mother board and a second step corresponding to the first lower mother board are arranged on the first guide post.

Further, an upper die II in the die II comprises an upper fixing plate II, a female die plate II, a sprue bush II and a positioning ring II, and the upper fixing plate II is connected with the female die plate II through a guide pillar II; the upper surface of the lower die II is provided with a third through groove for injection molding, and the third through groove is respectively connected with the third die core and the fourth through groove on the fourth die core; the sprue bush is arranged on the upper fixing plate II and is connected with the through groove III on the lower die II; the upper fixing plate II is also provided with a positioning ring II for connecting the sprue bush II and an external injection molding pipeline; the lower die II comprises a male die plate, an ejector rod, a lower ejector, an upper ejector, a wear-resisting block and a lower fixing plate I; the two wear-resistant blocks are symmetrically arranged on the edges of the two sides of the upper surface of the lower fixed plate and are positioned between the first lower fixed plate and the male template; the lower ejection part and the upper ejection part are arranged between the two wear-resistant blocks; the third mold core comprises a third female mold core arranged on the upper mold II and a third male mold core arranged on the lower mold II; the second die core comprises a second female die core arranged on the first die core and a second male die core arranged on the second die core; one end of the ejector rod is fixedly arranged between the upper ejector and the lower ejector, and the other end of the ejector rod sequentially penetrates through the upper ejector, the male template, the fourth male mold core or the third male mold core from bottom to top.

Furthermore, a first clamping structure for clamping the first mold core and the second mold core is further arranged on the first upper mold, wherein the first mold core is consistent with the first clamping structure of the second mold core; the first clamping structure comprises a first left clamping block, a first right clamping block and a first side clamping block; the first side clamping block is arranged on one side of the first die core, which is far away from the center of the first die, and the first left clamping block and the first right clamping block are consistent in structure and symmetrically arranged in the direction perpendicular to the first side clamping block.

Furthermore, the left clamping block I comprises two sliding rails which are symmetrically arranged and a sliding block which comprises an inclined plane; the sliding block is arranged between the two sliding rails in a sliding manner, and the two sliding rails are fixedly connected with the first lower mother board; the upper fixing plate I is also provided with an extrusion block corresponding to the inclined plane on the sliding block, and the extrusion block is positioned on one side of the sliding block far away from the first mold core or the second mold core; an elastic piece is arranged between the sliding block and the first mold core or the second mold core; the inner injection thimble in the first mold core and the second mold core is fixedly arranged on the sliding block; the inner injection molding thimble penetrates through the thimble groove on the first mold core or the second mold core and is connected with the ejector rod in the first lower mold.

Furthermore, the first side clamping block is connected with the first upper fixing plate through an inclined guide pillar.

Furthermore, a protruding clamping block is arranged on the side surface of the top of the ejection rod; the clamping block is used for clamping the cavity insert and comprises a first cavity insert, a second cavity insert, a third cavity insert and a fourth cavity insert.

Furthermore, a first seat plate used for being connected with the rotary table is further arranged at the bottom of the first lower fixing plate in the second lower die, the length of the first seat plate is consistent with that of the first lower fixing plate, and the width of the first seat plate is larger than that of the first lower fixing plate.

Furthermore, at least one injection molding hole for one-time injection molding is formed in each of the first cavity plate in the first cavity and the second cavity plate in the second cavity, and the injection molding holes are respectively communicated with the through groove II formed in the upper surface of the first cavity and the internal injection molding space of the first cavity; the injection molding holes are respectively arranged corresponding to the secondary injection molding parts of the product.

The utility model has the advantages that:

the first rotationally symmetrical mold and the second rotationally symmetrical mold are respectively arranged on the turntable, so that secondary injection molding of a product is realized;

the upper end of the ejector rod is provided with a communicating through groove IV corresponding to the secondary injection part of the product and an inner injection channel of a through hole reserved on the product subjected to primary injection molding, so that the secondary injection molding of the product from the inner side of the product is realized, and a water gap can be reserved at the inner side;

the clamping operation of the mold core is realized by arranging the first clamping structure and the second clamping structure;

the injection molding holes in the first mother template and the second mother template are arranged to be over against the secondary injection molding part, so that the water gap of primary injection molding can be covered by the secondary injection molding material, and the smooth appearance of the product is ensured.

Drawings

Fig. 1 is an overall schematic view of a first embodiment of the present invention;

fig. 2 is a schematic view of a mold according to a first embodiment of the present invention;

fig. 3 is a schematic view of a second mold according to an embodiment of the present invention;

fig. 4 is an overall plan view of a first embodiment of the present invention;

FIG. 5 isbase:Sub>A cross-sectional view taken along line A-A of the structure of FIG. 4;

fig. 6 is a partially enlarged view of the first mold in fig. 5 according to the first embodiment of the present invention;

fig. 7 is a partial enlarged view of a second mold in fig. 5 according to a first embodiment of the present invention;

fig. 8 is a top surface structure of a first lower die and a second lower die according to a first embodiment of the present invention;

fig. 9 shows a second upper surface structure of the first lower die and the second lower die according to the first embodiment of the present invention;

fig. 10 is a schematic view of a guide post according to a first embodiment of the present invention;

fig. 11 is a schematic top surface structure view of a first lower die according to a first embodiment of the present invention;

fig. 12 is a schematic view of an upper surface structure of a lower motherboard according to a first embodiment of the present invention;

fig. 13 is a schematic view of a second upper surface structure of the first lower die according to the first embodiment of the present invention;

fig. 14 is a schematic view of an ejector rod according to a first embodiment of the present invention;

the attached drawings indicate the following: the injection molding device comprises a first mold 1, a first upper mold 11, a first upper fixing plate 111, an extrusion block 1111, a first cavity plate 112, a first upper cavity plate 1121, a first lower cavity plate 1122, a first through groove 1123, a first sprue bush 113, a first positioning ring 114, a first guide pillar 115, a first step 1151, a second step 1152, a first lower mold 12, a first mold insert 13, a first cavity insert 131, a thimble groove 1311, an injection molding hole 1312, a second through groove 132, a first core insert 133, a second mold insert 14, a second cavity insert 141, a second core insert 142, a first clamping structure 15, a first left clamping block 151, a slide rail 152, a slide block 153, a first right clamping block 154, a first side clamping block 155, a second mold 2, a second clamping block 151, a first clamping block and a second clamping block 13 the second upper die 21, the second upper fixing plate 211, the second cavity plate 212, the second sprue bush 213, the second positioning ring 214, the second guide pillar 215, the second lower die 22, the male die plate 221, the third through groove 2211, the ejector rod 222, the internal injection channel 2221, the fixture block 2222, the lower ejector 223, the upper ejector 224, the wear-resistant block 225, the first lower fixing plate 226, the third cavity insert 23, the third cavity insert 231, the third core insert 232, the fourth through groove 233, the internal injection hole 2331, the fourth cavity insert 24, the fourth cavity insert 241, the fourth core insert 242, the second clamping structure 25, the second left clamping block 251, the second right clamping block 252, the second side clamping block 253, the abutting block 254 and the rotary table 3.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, amount and proportion of each component may be changed arbitrarily and the layout of the components may be more complicated.

The first embodiment is as follows:

as shown in FIGS. 1 to 14, a two-color and two-mold structure comprises a first mold 1, a second mold 2 and a turntable 3; the first mold 1 and the second mold 2 are both arranged on the turntable 3 and are positioned on the same side of the turntable 3, and the positions of the first mold and the second mold on the turntable 3 are rotationally symmetrical about the circle center of the turntable 3; the first die 1 comprises a first upper die 11, a first lower die 12, a first die core 13 and a second die core 14, wherein the first die core 13 and the second die core 14 are arranged between the first upper die 11 and the first lower die 12; the upper die I11 comprises an upper fixing plate I111, a female die plate I112, a sprue bush I113 and a positioning ring I114, wherein the upper fixing plate I111 is connected with the female die plate I112 through a guide pillar I115; the first mother template 112 comprises a first upper mother board 1121 and a first lower mother board 1122, wherein the first upper mother board 1121 is arranged above the first lower mother board 1122; the first guide pillar 115 sequentially penetrates through the first upper mother plate 1121 and the first lower mother plate 1122 from top to bottom, and a first step 1151 corresponding to the first upper mother plate 1121 and a second step 1152 corresponding to the first lower mother plate 1122 are arranged on the first guide pillar 115; the upper surface of the lower motherboard 1122 is provided with a first through groove 1123 for injection molding, and the first through groove 1123 is respectively connected with a second through groove 132 arranged on the upper surfaces of the first mold core 13 and the second mold core 14; the first sprue bush 113 is arranged on the first upper fixing plate 111 and is connected with the first through groove 1123 on the first lower mother plate 1122; the first upper fixing plate 111 is also provided with a first positioning ring 114 for connecting the first sprue bush 113 and an external injection molding pipeline; the first mold core 13 includes a first cavity core 131 disposed on the first upper mold 11 and a first core 133 disposed on the first lower mold 12; the second mold core 14 includes a second cavity core 141 disposed on the first upper mold 11 and a second core 142 disposed on the first lower mold 12; inner injection thimbles corresponding to the secondary injection parts of the product are arranged on the first cavity insert 131 and the second cavity insert 141, and through the inner injection thimbles, through holes penetrating through the side wall of the product are reserved at the secondary injection parts of the product which is subjected to the primary injection molding; the second die 2 comprises a second upper die 21, a second lower die 22, a third die core 23 and a fourth die core 24; the third mold core 23 and the fourth mold core 24 are arranged between the second upper mold 21 and the second lower mold 22; the upper die II 21 comprises an upper fixing plate II 211, a female die plate II 212, a sprue bush II 213 and a positioning ring II 214, and the upper fixing plate II 211 is connected with the female die plate II 212 through a guide pillar II 215; the upper surface of the lower die II 22 is provided with a third through groove 2211 for injection molding, and the third through groove 2211 is respectively connected with a third die core 23 and a fourth die core 24; the sprue bush is arranged on the second upper fixing plate 211 and is connected with the third through groove 2211 on the second lower die 22; the second upper fixing plate 211 is also provided with a second positioning ring 214 for connecting the second sprue bush 213 with an external injection molding pipeline; the second lower die 22 comprises a male die plate 221, an ejector rod 222, a lower ejector 223, an upper ejector 224, a wear-resistant block 225 and a first lower fixing plate 226; two wear-resistant blocks 225 are symmetrically arranged on the two side edges of the upper surface of the lower fixed plate and are positioned between the first lower fixed plate 226 and the male template 221; the lower ejector 223 and the upper ejector 224 are arranged between two wear-resistant blocks 225; the third mold core 23 comprises a third cavity core 231 arranged on the second upper mold 21 and a third core 232 arranged on the second lower mold 22; the fourth mold core 24 includes a fourth cavity core 241 disposed on the second upper mold 21 and a fourth core 242 disposed on the second lower mold 22; the ejector rod 222 sequentially passes through the third core insert 232 or the fourth core insert 242, the core plate 221 and the upper ejector 224 from top to bottom, and is connected with the upper surface of the lower ejector 223; the upper surfaces of the third core insert 232 and the fourth core insert 242 are provided with a fourth through groove 233 connected with the third through groove 2211; the through groove four 233 includes an inner injection hole 2331 penetrating through the third core insert 232 or the fourth core insert 242 and connected to the ejector pin 222; the upper ends of the ejector rods 222 are made of an elastomer material, in this example, the portions of the ejector rods 222 located in the third core insert 232 or the fourth core insert 242 are made of an elastomer material; the upper end of the ejector rod 222 is provided with an inner injection channel 2221 corresponding to the secondary injection part of the product, one end of the inner injection channel 2221 is connected with the inner injection hole 2331, and the other end corresponds to the positions of the inner injection ejector pins in the first mold core 13 and the second mold core 14, so that the through groove four 233 is communicated with the secondary injection part of the product through the inner injection channel 2221 and the through hole reserved on the product subjected to the primary injection molding. In this example, the first lower die 12 and the second lower die 22 have the same structure, and are arranged rotationally symmetrically with respect to the axis of the turntable 3; the first core insert 133 and the third core insert 232 have the same structure, and are rotationally and symmetrically arranged about the axis of the turntable 3; the second core insert 142 and the fourth core insert 242 have the same structure, and are disposed in rotational symmetry with respect to the axis of the turntable 3.

The first upper die 11 is further provided with a first clamping structure 15 for clamping the first die core 13 and the second die core 14, wherein the first die core 13 is identical to the first clamping structure 15 of the second die core 14, and taking the first clamping structure 15 of the first die core 13 as an example, the first clamping structure 15 comprises a first left clamping block 151, a first right clamping block 154 and a first side clamping block 155; the first side clamping block 155 is arranged on one side of the first die core 13, which is far away from the center of the first die 1, and the first left clamping block 151 and the first right clamping block 154 are consistent in structure and symmetrically arranged in the direction perpendicular to the first side clamping block 155. The first side clamping block 155 is connected with the first upper fixing plate 111 through an inclined guide post; the left clamping block I151 comprises symmetrically arranged slide rails 152 and a slide block 153 comprising an inclined plane, wherein the slide block 153 is arranged between the two slide rails 152 in a sliding manner, and the two slide rails 152 are fixedly connected with the lower mother board I1122; the first upper fixing plate 111 is further provided with an extrusion block 1111 corresponding to the inclined surface of the slide 153, the extrusion block 1111 penetrates through the first cavity plate 112 and contacts the inclined surface of the slide 153, and the extrusion block 1111 is located on one side of the slide 153 away from the first mold core 13 or the second mold core 14. An elastic member is further disposed between the slider 153 and the first mold core 13 or the second mold core 14, so that the slider 153 can move in a direction away from the first mold core 13 or the second mold core 14 when not being pressed by the extrusion block 1111, thereby releasing the first mold core 13 or the second mold core 14. In this embodiment, the inner injection thimble in the first mold core 13 and the second mold core 14 is fixed on the slide block 153, wherein the inner injection thimble passes through the thimble groove 1311 of the first mold core 13 or the second mold core 14 and is connected to the ejector pin 222 in the first lower mold 12. In the implementation process, the pressing block 1111 disposed on the first upper fixing plate 111 applies a pressure to the slide block 153 of the first left clamping block 151 and the first right clamping block 154 toward the first mold core 13 or the second mold core 14, and the first side clamping block 155 is driven to move toward the direction close to the first mold core 13 or the second mold core 14 by the inclined guide post, so as to clamp the first mold core 13 and the second mold core 14. The second upper die 21 is also provided with a second clamping structure 25, wherein the second clamping structure 25 is similar to the first clamping structure 15, except that a second side clamping block 253 in the second clamping structure 25 is similar to the first left clamping block 151 or the first right clamping block 154 in structure, and the second side clamping block 253 is arranged on one side of the third die core 23 close to the center of the second die 2; and the left clamping block II 251 and the right clamping block II 252 of the clamping structure II 25 are not provided with inner injection ejector pins, and the left clamping block II 251, the right clamping block II 252 and the side clamping block II 253 are also provided with abutting blocks 254 which are directly contacted with a product in a direction.

A protruding fixture block 2222 is disposed on a side surface of the top of the ejector rod 222, and the fixture block 2222 is used for clamping a cavity, including the first cavity 131 to the fourth cavity 241, to limit a lowest position of the fixture block 2222, so as to limit a lowest position of the ejector rod 222.

The bottom of the first lower fixing plate 226 in the second lower die 22 is further provided with a first seat plate for connecting the rotary table 3, wherein the length of the first seat plate is the same as that of the first lower fixing plate 226, and the width of the first seat plate is greater than that of the first lower fixing plate 226.

At least one injection molding hole 1312 for primary injection molding is formed in each of the first cavity plate in the first cavity 13 and the second cavity plate in the second cavity 14, and the injection molding holes 1312 are respectively communicated with the second through groove 132 formed in the upper surface of the first cavity 13 and the internal injection molding space of the first cavity 13, and the second through groove 132 formed in the upper surface of the second cavity 14 and the internal injection molding space of the second cavity 14; in this example, there are two injection molding holes 1312 on the first mother template, the two injection molding holes 1312 are respectively arranged corresponding to the secondary injection molding parts of the product, and the injection molding hole 1312 arranged on the second mother template is identical to the first mother template 112; wherein, the injection molding hole 1312 corresponds to the secondary injection molding part of the product, so that the water gap of the primary injection molding can be covered by the material of the secondary injection molding, and the appearance of the product is smooth.

It should be noted that in some other embodiments, other numbers of mold cores may be disposed in the first mold 1 and the second mold 2, for example, one mold core or more than two mold cores are disposed in both the first mold 1 and the second mold 2.

In the implementation process, a first rotationally symmetrical mold 1 and a second rotationally symmetrical mold 2 are respectively arranged on the turntable 3, so that secondary injection molding of a product is realized; through the arrangement of the communicating through groove four 233 corresponding to the secondary injection part of the product and the inner injection channel 2221 of the through hole reserved on the product formed by one-time injection molding at the upper end of the ejector rod 222, the secondary injection molding of the product from the inner side of the product is realized, and a water gap can be reserved on the inner side; the clamping operation of the mold core is realized by arranging a first clamping structure 15 and a second clamping structure 25; the injection molding holes 1312 in the first mother template and the second mother template are arranged to be over against the secondary injection molding part of the product, so that the water gap of primary injection molding can be covered by the material of secondary injection molding, and the appearance of the product is ensured to be smooth.

The above description is only one specific example of the present invention and does not constitute any limitation to the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in form and detail without departing from the principles and structures of the invention, but such modifications and variations are within the scope of the appended claims.

Claims (10)

1. A double-color double-mold structure comprises a first mold (1), a second mold (2) and a turntable (3); the first die (1) and the second die (2) are both arranged on the same side of the turntable (3); the positions of the first mold (1) and the second mold (2) on the turntable (3) are rotationally symmetrical about the circle center of the turntable (3); a first mold core (13) and a second mold core (14) are arranged between a first upper mold (11) and a first lower mold (12) in the first mold (1); a third mold core (23) and a fourth mold core (24) are arranged between the second upper mold (21) and the second lower mold (22) in the second mold (2); the injection molding device is characterized in that an inner injection thimble corresponding to a secondary injection part of a product is arranged on a first mold core (13) and a second mold core (14) in the first mold (1); the upper surfaces of a third core insert (232) in the third core insert (23) and a fourth core insert (242) in the fourth core insert (24) are provided with a through groove four (233) for injection molding; the through groove four (233) comprises an inner injection hole (2331) which penetrates through the third core insert (232) or the fourth core insert (242) and is connected with the ejector rod (222) in the third core insert (232) or the fourth core insert (242); the upper end of the ejector rod (222) is made of an elastomer material, an inner injection channel (2221) corresponding to the secondary injection part of the product is arranged at the upper end of the ejector rod (222), one end of the inner injection channel (2221) is connected with the inner injection hole (2331), and the other end of the inner injection channel corresponds to the positions of the inner injection thimbles in the first mold core (13) and the second mold core (14).

2. The structure of the double-color and double-mold according to claim 1, wherein the first upper mold (11) in the first mold (1) comprises a first upper fixing plate (111), a first female mold plate (112), a first sprue bush (113) and a first positioning ring (114), and the first upper fixing plate (111) is connected with the first female mold plate (112) through a first guide pillar (115); the first mother template (112) comprises a first upper mother plate (1121) and a first lower mother plate (1122), wherein the first upper mother plate (1121) is arranged above the first lower mother plate (1122); a first through groove (1123) for injection molding is formed in the upper surface of the first lower mother plate (1122), and the first through groove (1123) is connected with a second through groove (132) formed in the upper surfaces of the first mold core (13) and the second mold core (14) respectively; the first sprue bush (113) is arranged on the first upper fixing plate (111) and is connected with the first through groove (1123) on the first lower motherboard (1122); the upper fixing plate I (111) is also provided with a positioning ring I (114) used for connecting the sprue bush I (113) with an external injection molding pipeline; the first die core (13) comprises a first female die core (131) arranged on the first upper die (11) and a first male die core (133) arranged on the first lower die (12); the second mold core (14) comprises a second female mold core (141) arranged on the first upper mold (11) and a second male mold core (142) arranged on the first lower mold (12).

3. The dual-color dual-mold structure as claimed in claim 2, wherein the first guide pillar (115) sequentially passes through the first upper mother plate (1121) and the first lower mother plate (1122) from top to bottom, and the first guide pillar (115) has a first step (1151) corresponding to the first upper mother plate (1121) and a second step (1152) corresponding to the first lower mother plate (1122).

4. The structure of claim 3, wherein the second upper mold (21) of the second mold (2) comprises a second upper fixing plate (211), a second female mold plate (212), a second sprue bush (213) and a second positioning ring (214), and the second upper fixing plate (211) is connected with the second female mold plate (212) through a second guide pillar (215); a third through groove (2211) for injection molding is formed in the upper surface of the second lower die (22), and the third through groove (2211) is respectively connected with a third through groove (23) and a fourth through groove (233) on the fourth through groove (24); the sprue bush is arranged on the second upper fixing plate (211) and connected with the third through groove (2211) in the second lower die (22); a second positioning ring (214) for connecting the second sprue bush (213) with an external injection molding pipeline is further arranged on the second upper fixing plate (211); the second lower die (22) comprises a male die plate (221), an ejector rod (222), a lower ejector (223), an upper ejector (224), a wear-resistant block (225) and a first lower fixing plate (226); the two wear-resistant blocks (225) are symmetrically arranged on the edges of the two sides of the upper surface of the lower fixed plate and are positioned between the first lower fixed plate (226) and the male template (221); the lower ejection (223) and the upper ejection (224) are arranged between the two wear-resistant blocks (225); the third die core (23) comprises a third female die core (231) arranged on the second upper die (21) and a third male die core (232) arranged on the second lower die (22); the fourth die core (24) comprises a fourth female die core (241) arranged on the second upper die (21) and a fourth male die core (242) arranged on the second lower die (22); one end of the ejector rod (222) is fixedly arranged between the upper ejector (224) and the lower ejector (223), and the other end of the ejector rod sequentially penetrates through the upper ejector (224), the male die plate (221), the fourth male die core (242) or the third male die core (232) from bottom to top.

5. The double-color double-mold structure according to claim 3, wherein the first upper mold (11) is further provided with a first clamping structure (15) for clamping the first mold core (13) and the second mold core (14), wherein the first mold core (13) is consistent with the first clamping structure (15) of the second mold core (14); the first clamping structure (15) comprises a first left clamping block (151), a first right clamping block (154) and a first side clamping block (155); the first side clamping block (155) is arranged on one side, away from the center of the first die core (13), of the first die core (1), the first left clamping block (151) and the first right clamping block (154) are identical in structure and symmetrically arranged in the direction perpendicular to the first side clamping block (155).

6. The structure of two-color and two-mold according to claim 5, wherein the first left clamping block (151) comprises two slide rails (152) arranged symmetrically and a slide block (153) comprising an inclined plane; the sliding block (153) is arranged between the two sliding rails (152) in a sliding mode, and the two sliding rails (152) are fixedly connected with the lower mother board I (1122); the first upper fixing plate (111) is also provided with an extrusion block (1111) corresponding to the inclined surface on the sliding block (153), and the extrusion block (1111) is positioned on one side of the sliding block (153) far away from the first mold core (13) or the second mold core (14); an elastic piece is arranged between the sliding block (153) and the first mold core (13) or the second mold core (14); the inner injection thimble in the first mold core (13) and the second mold core (14) is fixedly arranged on the sliding block (153); the inner injection thimble penetrates through a thimble groove (1311) on the first mold core (13) or the second mold core (14) and is connected with a thimble (222) in the first lower mold (12).

7. The structure of two-color double mold according to claim 5, characterized in that the first side clamping block (155) is connected with the first upper fixing plate (111) through an inclined guide post.

8. The dual color and dual mold structure according to claim 4, wherein the top side of the ejector rod (222) is provided with a protruding latch (2222); the clamping block (2222) is used for clamping the cavity, and comprises a first cavity (131), a second cavity (141), a third cavity (231) and a fourth cavity (241).

9. The double-color double-mold structure as claimed in claim 4, wherein the bottom of the first lower fixing plate (226) in the second lower mold (22) is further provided with a first seat plate for connecting the turntable (3), wherein the length of the first seat plate is consistent with the length of the first lower fixing plate (226), and the width of the first seat plate is larger than the width of the first lower fixing plate (226).

10. The structure of claim 4, wherein the first cavity plate of the first cavity (13) and the second cavity plate of the second cavity (14) are each provided with at least one injection molding hole (1312) for injection molding, and the injection molding holes (1312) are respectively communicated with the through groove (132) formed in the upper surface of the first cavity (13) and the internal injection molding space of the first cavity (13); the injection molding holes (1312) are respectively arranged corresponding to the secondary injection molding parts of the product.

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