CN212241866U - Double-color injection mold - Google Patents

Abstract

The utility model provides a double-shot injection mold, including first front mold core, second front mold core and back mold core, back mold core is used for optionally cooperating with first front mold core and second front mold core, when back mold core and first front mold core cooperation and be in the compound die state, back mold core and first front mold core together inject the first injection molding chamber that is used for shaping the semi-manufactured goods, be equipped with the concave part and/or convex part that are located the first injection molding chamber on at least one of first front mold core and back mold core; when the rear mold core is matched with the second front mold core and is in a mold closing state, the rear mold core and the second front mold core jointly define a second injection molding cavity for containing the semi-finished product and forming a finished product through injection molding on the basis of the semi-finished product. The semi-finished product is not easy to shrink, and the finished product has high forming quality.

Description

Double-color injection mold

Technical Field

The utility model relates to a mold field particularly, relates to a double-shot injection mold.

Background

With the continuous development of economy and the continuous progress of society, abundant material consumption products are provided, and good conditions are created for improving the living standard of people and pursuing personalized life, so that the demand of the material consumption products is accelerated, a plastic product is one of the material consumption products, and the plastic product is generally formed by injection molding through an injection mold. Such as the manufacture of automotive grille trim strips.

Researches show that the existing double-color automobile grille decoration strip has the following defects in the processing process:

the molding quality is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a double-shot injection mold, its shaping quality that can improve the product.

The embodiment of the utility model is realized like this:

the embodiment of the utility model provides a double-shot injection mold, include:

the injection molding device comprises a first front mold core, a second front mold core and a rear mold core, wherein the rear mold core is used for being selectively matched with the first front mold core and the second front mold core; when the rear mold core is matched with the second front mold core and is in a mold closing state, the rear mold core and the second front mold core jointly define a second injection molding cavity for containing the semi-finished product and forming a finished product through injection molding on the basis of the semi-finished product.

In an alternative embodiment, the rear mold core is provided with a rear mold cavity for cooperation with the first front mold core to form the first injection mold cavity, and the bottom of the rear mold cavity is provided with a recess and/or a projection.

In an alternative embodiment, the first front mold core comprises an insert and a blocking piece, wherein the insert is connected with the blocking piece; the insert is used for filling the part of the rear mold cavity, so that the insert, the plugging piece and the rear mold core form a first injection molding cavity together.

In an alternative embodiment, the number of the concave portions or the convex portions is multiple, and the multiple concave portions or the multiple convex portions are arranged at intervals in the extending direction of the first injection molding cavity.

In an alternative embodiment, the rear mold core is provided with a first flow channel for communication with the first injection molding cavity and a second flow channel for communication with the second injection molding cavity.

In an optional embodiment, the double-color injection mold further comprises an oblique top, the oblique top is embedded in the rear mold core, the oblique top is provided with a first side and a second side which are opposite, the first side is provided with a first connecting groove communicated with the first flow channel, and the first connecting groove is communicated with the first injection molding cavity; and a second connecting groove communicated with the second flow channel is arranged on the second side, and the second connecting groove is communicated with the second injection molding cavity.

In an optional embodiment, the double-color injection mold further comprises an ejector plate, the lifter comprises an ejector block and an ejector rod, the ejector block is embedded in the rear mold core, and the first connecting groove and the second connecting groove are arranged on two opposite side walls of the ejector block; the ejector rod is arranged on the ejector plate, the ejector plate is used for driving the ejector rod to lift, and the ejector rod is connected with the ejector block and used for driving the ejector block to be close to or far away from the first front mold core relative to the rear mold core; when the ejector block drives the finished product to be jacked to be separated from the rear mold core, the ejector rod can move relative to the ejector plate to be separated from the finished product.

In an alternative embodiment, the first front mold core is provided with a plurality of first gates communicated with the first flow channel, and the plurality of first gates are arranged at intervals along the extending direction of the first injection molding cavity.

In an alternative embodiment, the second front mold core is provided with a plurality of second gates communicated with the second flow channel, and the plurality of second gates are arranged at intervals along the extending direction of the second injection molding cavity.

In an alternative embodiment, the number of rear mold cores is two, and the two rear mold cores are used for being matched with the first front mold core and the second front mold core respectively.

The embodiment of the utility model provides a beneficial effect is:

to sum up, this embodiment provides a double-colored injection mold, when the double-colored finished product of shaping, make first preceding mold core and back mold core compound die cooperation form first injection molding chamber earlier, then pour into the raw materials into first injection molding chamber to shaping semi-manufactured goods in first injection molding chamber. Meanwhile, as the concave part and/or the convex part are/is arranged in the first injection molding cavity, the convex part and/or the concave part is/are formed at the corresponding position of the semi-finished product in the process of injecting the semi-finished product, namely, the mold is partially embedded with the semi-finished product, so that the semi-finished product is pulled, the semi-finished product is not easy to shrink in the extension direction, the semi-finished product is not easy to have the defects of folds, cracks and the like, and the molding quality of the semi-finished product is high. And then, the rear mold core is matched with the second front mold core by adjusting the position of the mold, the rear mold core and the second front mold core form a second injection molding cavity after mold closing, the semi-finished product is positioned in the second injection molding cavity, and at the moment, the raw materials are injected into the second injection molding cavity to form a finished product on the basis of the semi-finished product. Because the shrinkage of the semi-finished product in the extension direction is small or even can not be shrunk, and the length size of the semi-finished product conforms to the design size, the raw material injected into the second injection molding cavity is well matched with the semi-finished product, the phenomenon of mantle is not easy to generate at the two ends of the product, and the molding quality of the final finished product is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a semi-finished product according to an embodiment of the present invention (the waste material of the runner and the gate is not cut off);

fig. 2 is a schematic structural diagram of a finished product according to an embodiment of the present invention (the waste of the runner and the gate is not cut off);

FIG. 3 is a schematic structural view of a two-color injection mold according to an embodiment of the present invention;

fig. 4 is a schematic view of the first front mold core and the rear mold core according to the embodiment of the present invention;

fig. 5 is a cross-sectional view of a first front mold core and a rear mold core mating structure according to an embodiment of the present invention;

fig. 6 is a schematic view of a second front mold core and a second rear mold core according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a second front mold core and rear mold core mating structure according to an embodiment of the present invention;

FIG. 8 is a schematic view of the lower die holder and the rear die core according to an embodiment of the present invention;

fig. 9 is an exploded view of the rear mold core and the lifter according to an embodiment of the present invention;

FIG. 10 is an enlarged partial schematic view of FIG. 9;

fig. 11 is a schematic structural view of the lifter according to the embodiment of the present invention;

fig. 12 is a schematic view of the first front mold core and the upper mold frame according to the embodiment of the present invention;

fig. 13 is a schematic structural view of a first front mold core according to an embodiment of the present invention;

fig. 14 is a schematic structural view of a first front mold core and a first glue inlet system according to an embodiment of the present invention;

fig. 15 is a schematic structural view of a second front mold core and a second glue inlet system according to an embodiment of the present invention.

Icon:

001-double-color injection mold; 100-a first front mold core; 110-an insert; 120-a closure; 130-a first gate; 200-a second front mold core; 210-a second gate; 300-rear mold core; 310-rear mold cavity; 320-a first flow channel; 330-a second flow channel; 340-a convex part; 350-tiger's mouth position; 360-pitched roof; 361-first connecting groove; 362-a second connecting groove; 400-a first injection molding cavity; 500-a second injection molding cavity; 600-lower die carrier; 700-ejector plate; 800-B plate; 810-a pressure-bearing block; 900-mounting a die carrier; 910-a plate; 010-a first glue feeding system; 020-second glue inlet system; 002-semi-finished product; 003-finished product.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 3, the embodiment provides a two-color injection mold 001, which can be used for processing an automobile grille decoration strip, and obviously, can also be used for processing other two-color plastic products. Finished products 003 obtained by injection molding of the double-color injection mold 001 have high quality.

Referring to fig. 1-7, fig. 2 is a schematic diagram of a finished product, in which the sprue and runner scrap is cut off, and two decorative pieces are obtained after the sprue and runner scrap is cut off. In this embodiment, the two-color injection mold 001 includes a first front mold core 100, a second front mold core 200, and a rear mold core 300, the rear mold core 300 is configured to selectively cooperate with the first front mold core 100 and the second front mold core 200, when the rear mold core 300 cooperates with the first front mold core 100 and is in a mold closing state, the rear mold core 300 and the first front mold core 100 jointly define a first injection molding cavity 400 for molding a semi-finished product 002, and at least one of the first front mold core 100 and the rear mold core 300 is provided with a concave portion and/or a convex portion 340 located in the first injection molding cavity 400; when rear mold core 300 is matched with second front mold core 200 and is in a mold closing state, rear mold core 300 and second front mold core 200 jointly define second injection molding cavity 500 for containing semi-finished product 002 and forming finished product 003 through injection molding on the basis of semi-finished product 002.

The double-color injection mold 001 provided by the embodiment forms a first injection molding cavity 400 by matching the first front mold core 100 and the rear mold core 300 in a mold closing manner when a finished product 003 with two colors is formed, and then injects raw materials into the first injection molding cavity 400, so that a semi-finished product 002 is formed in the first injection molding cavity 400. Meanwhile, as the concave part and/or the convex part 340 are/is arranged in the first injection molding cavity 400, in the process of injecting the semi-finished product 002, the convex part 340 and/or the concave part is formed at the corresponding position of the semi-finished product 002, namely, the mold is partially embedded with the semi-finished product 002, so that the semi-finished product 002 is pulled, the semi-finished product 002 is not easy to shrink in the extending direction, the semi-finished product 002 is not easy to have the defects of folds, cracks and the like, and the molding quality of the semi-finished product 002 is high. Then, the mold position is adjusted to enable the rear mold core 300 to be matched with the second front mold core 200, the rear mold core and the second front mold core form a second injection molding cavity 500 after mold closing, the semi-finished product 002 is located in the second injection molding cavity 500, at the moment, raw materials are injected into the second injection molding cavity 500, and a finished product 003 is formed on the basis of the semi-finished product 002. Because the shrinkage of the semi-finished product 002 is small in the extending direction and even can not shrink, and the length size of the semi-finished product 002 is consistent with the design size, the raw material injected into the second injection molding cavity 500 is well matched with the semi-finished product 002, the flashing phenomenon is not easy to generate at the two ends of the product, and the molding quality of the final finished product 003 is high.

In this embodiment, it should be noted that the first injection molding cavity 400 for molding the semi-finished product 002 has concave and/or convex portions 340, for example, the concave and/or convex portions 340 may be provided on the first front mold core 100, or the concave and/or convex portions 340 may be provided on the rear mold core 300, or both the first front mold core 100 and the rear mold core 300 may be provided with the concave and/or convex portions 340. Referring to fig. 9 and 10, in the present embodiment, the protrusion 340 is disposed on the rear mold core 300 for illustration, and since the protrusion 340 is disposed on the rear mold core 300, after the injection molding is completed, the concave corresponding to the protrusion 340 is formed on the semi-finished product 002, that is, the concave is formed on the final finished product 003, when the finished product 003 is assembled with other components, no additional protruding portion is formed on the finished product 003, so that interference with other components is not easily generated, and the assembly difficulty is reduced.

In this embodiment, the number of the rear mold cores 300 may be one or two, and the two rear mold cores 300 are alternately matched with the first front mold core 100 and the second front mold core 200, in other words, when one of the rear mold cores 300 is matched with the first front mold core 100, the other rear mold core 300 is matched with the second front mold core 200. Thus, when the semi-finished product 002 is molded in the first injection molding cavity 400 corresponding to the first front mold core 100, the finished product 003 can be injected on the finished semi-finished product 002 in the second injection molding cavity 500 corresponding to the second front mold core 200, and the injection molding is circulated in such a way, so that the injection molding efficiency is improved.

Referring to fig. 8, in the present embodiment, the two-color injection mold 001 further includes a lower mold frame 600, an ejector plate 700, and a B plate 800, where the lower mold frame 600 is used to be connected to a rotating device, and the rotating device drives the lower mold frame 600 to rotate. The ejector plate 700 and the B plate 800 are both arranged on the lower die carrier 600, and the ejector plate 700 is farther away from the first front die core 100 relative to the B plate 800. The B plate 800 is provided with two assembling grooves for assembling the rear mold core 300, and the two assembling grooves are respectively used for assembling one rear mold core 300. Correspondingly, an ejector plate 700 is provided at the bottom of each rear mold core 300.

For convenience of description, the two rear mold cores 300 are a first rear mold core and a second rear mold core, respectively, and it should be noted that the first rear mold core and the second rear mold core are only used for distinguishing names, and the structures of the first rear mold core and the second rear mold core may be designed to be identical. In addition, the first rear mold core and the first front mold core 100 can cooperate to form a first injection molding cavity 400, and the first rear mold core and the second front mold core 200 can cooperate to form a second injection molding cavity 500; the second rear mold core can cooperate with the first front mold core 100 to form a first injection molding cavity 400 and the second rear mold core can cooperate with the second front mold core 200 to form a second injection molding cavity 500.

It should be noted that the first rear mold core and the second rear mold core are both in a strip-shaped structure.

Optionally, a bearing block 810 is disposed on the B plate 800 to reduce damage to the parting surface caused by mold clamping force.

Furthermore, a tiger's mouth position 350 is arranged on the rear mold core 300, the tiger's mouth position 350 is arranged at one end of the rear mold core 300 in the length direction, and after the mold is closed, the positions of the front mold core and the rear mold core 300 are firmer and are not easy to shift.

Further, the rear mold core 300 is provided with a rear mold cavity 310, and a first runner 320 and a second runner 330 both communicated with the rear mold cavity 310, wherein the rear mold cavity 310 extends along the length direction of the rear mold core 300. The first flow passage 320 is adapted to communicate with the first injection molding chamber 400 and the second flow passage 330 is adapted to communicate with the second injection molding chamber 500. The number of the first flow channels 320 and the second flow channels 330 is set as required, in this embodiment, the number of the first flow channels 320 is three, and the three first flow channels 320 are arranged at intervals in the length direction of the rear mold core 300; the number of the second flow channels 330 is three, and the three second flow channels 330 are arranged at intervals in the length direction of the rear mold core 300. Wherein one first flow channel 320 and one second flow channel 330 are paired.

Referring to fig. 10 and 11, optionally, a slanted ejecting part 360 is provided on the rear mold core 300, the slanted ejecting part 360 is connected to the ejector plate 700, and the slanted ejecting part 360 can move in the width direction of the rear mold core 300. The lifter 360 is embedded in the rear mold core 300, the lifter 360 has a first side and a second side opposite to each other in the length direction of the rear mold core 300, a first connecting groove 361 is formed on the first side, and a second connecting groove 362 is formed on the second side. In a mold closing state, the lifter 360 is embedded in the rear mold core 300, and the paired first runner 320 and second runner 330 communicate with the first connecting groove 361 and second connecting groove 362, respectively, that is, the first runner 320 communicates with the rear mold cavity 310 through the first connecting groove 361, and the second runner 330 communicates with the second cavity through the second connecting groove 362; and first connecting groove 361 is located the lateral part of first injection molding chamber 400, and second connecting groove 362 is located the lateral part of second injection molding chamber 500 to adopt the mode of advancing glue of diving, the product appearance is more pleasing to the eye.

Further, the first connecting groove 361 is communicated with the rear mold cavity 310 at the top of the rear mold cavity 310, and after mold closing is performed, raw materials are injected from a sprue, and enter the first injection molding cavity 400 through the first runner 320 and the first connecting groove 361 to form a semi-finished product 002. Then, the position of the rear mold core 300 is adjusted, the lower mold base 600 can be rotated to drive the rear mold core 300 to rotate to the position of the second front mold core 200, raw materials are injected from the second flow passage 330 after mold closing, and a finished product 003 is formed in the second injection molding cavity 500 on the basis of the semi-finished product 002.

Meanwhile, the inclined top 360 is movably connected with the ejector plate 700, after the injection molding of the finished product 003 is completed, the mold is opened, the inclined top 360 is lifted and drives the finished product 003 to lift and be separated from the rear mold core 300, then the inclined top 360 moves along the width direction of the rear mold core 300, the inclined top 360 is separated from the finished product 003, and finally the finished product 003 is taken out.

In this embodiment, it should be noted that two rear mold cavities 310 may be disposed on the rear mold core 300, and the two rear mold cavities 310 are arranged at intervals in the width direction of the rear mold core 300, and obviously, each rear mold cavity 310 has a first flow channel 320 and a second flow channel 330 which are communicated with a gate. Correspondingly, after the rear mold core 300 and the first front mold core 100 are assembled, two first injection molding cavities 400 are formed in a matched mode, and after the rear mold core 300 and the second front mold core 200 are assembled, two second injection molding cavities 500 are formed in a matched mode, two finished products 003 can be formed simultaneously, and machining efficiency is improved.

Correspondingly, each rear mold cavity 310 is correspondingly provided with an inclined top 360, after the injection molding of the finished product 003 is completed, the two inclined tops 360 ascend to drive the finished product 003 to ascend, and then the two inclined tops 360 approach each other to be separated from the finished product 003.

In this embodiment, optionally, the lifter 360 includes a top block and a top rod, the top rod is connected to the top block, the top block is embedded in the rear mold core 300, and the first connecting groove 361 and the second connecting groove 362 are disposed on two opposite sidewalls of the top block; the ejector rods are arranged on the ejector plate 700, the ejector plate 700 is used for driving the ejector rods to lift, and the ejector rods are connected with the ejector blocks and used for driving the ejector blocks to approach or depart from the first front mold core 100 relative to the rear mold core 300; after the ejector block drives the finished product 003 to lift up to be separated from the rear mold core 300, the ejector rod can move relative to the ejector plate 700 to drive the ejector block to move relative to the finished product 003, so that the inclined ejector 360 is separated from the finished product 003.

Referring to fig. 12, in the present embodiment, optionally, a plurality of first gates 130 are disposed on the first front mold core 100, and the plurality of first gates 130 are arranged at intervals along the extending direction of the first injection molding cavity 400. In the present embodiment, the number of the first gates 130 is three, and each of the first gates 130 communicates with two first runners 320, in other words, one first gate 130 is shared by two first runners 320 communicating with different first injection cavities 400.

Referring to fig. 13, further, the first front mold core 100 includes an insert 110 and a blocking piece 120, the insert 110 is connected to the blocking piece 120; the insert 110 is used to fill a portion of the space of the rear mold cavity 310 on the rear mold core 300, so that the insert 110, the closing member 120 and the rear mold core 300 together form the first injection mold cavity 400.

It should be noted that, when two rear mold cavities 310 are provided on the rear mold core 300, the number of the blocking pieces 120 is two, and both the blocking pieces 120 are connected to the insert 110.

Optionally, the insert 110 is processed by linear cutting, so that the processing quality is high, the outline of the semi-finished product 002 obtained by injection molding is clear, and the stereoscopic impression of the product is improved.

Referring to fig. 12, optionally, a plurality of second gates 210 are disposed on the second front mold core 200, and the plurality of second gates 210 are arranged at intervals along the extending direction of the second injection molding cavity 500. In the present embodiment, the number of the second gates 210 is three, and each of the second gates 210 communicates with two second flow channels 330, in other words, one second gate 210 is shared by two second flow channels 330 communicating with different second injection cavities 500.

In this embodiment, optionally, the two-color injection mold 001 further includes an upper mold frame 900, the upper mold frame 900 is provided with an a plate 910, and the first front mold core 100 and the second front mold core 200 are both connected to the a plate 910.

Referring to fig. 14 and fig. 15, in the present embodiment, optionally, the two-color injection mold 001 further includes a first glue inlet system 010 and a second glue inlet system 020, where the first glue inlet system 010 is simultaneously communicated with the plurality of first gates 130; the second glue feeding systems 020 are simultaneously communicated with the second gates 210.

According to the double-color injection mold 001 provided by the embodiment, in an initial state, the first rear mold core is matched with the first front mold core 100, the second rear mold core is matched with the second front mold core 200, and the upper mold frame 900 and the lower mold frame 600 are in sliding fit through the guide pillars and the guide sleeves to play a role in guiding and positioning. After the first mold closing, the first rear mold core and the first front mold core 100 form a first injection molding cavity 400, raw materials are injected through the first glue inlet system 010, and a semi-finished product 002 is formed in the first injection molding cavity 400, wherein the semi-finished product 002 can be blue; then, the mold is opened, the lower mold base is rotated, the positions of the first rear mold core and the second rear mold core are interchanged, the first rear mold core and the second front mold core 200 are matched to form a second injection molding cavity 500, the second rear mold core and the first front mold core 100 are matched to form a first injection molding cavity 400, at the moment, the first glue feeding system 010 and the second glue feeding system 020 can be used for feeding glue simultaneously, a semi-finished product 002 is formed in the first injection molding cavity 400, and a finished product 003 is formed in the second injection molding cavity 500 on the basis of the semi-finished product 002. The portion of the second injection mold cavity 500 that is molded by injecting the material may be white. The final formed product is blue-white. That is, in the width direction of the product 003, a part is blue and the other part is white.

Obviously, in other embodiments, the finished product 003 may not be a two-color product having alternating blue and white colors, but may be composed of two different colors.

The double-shot injection mold 001 provided by the embodiment has high product forming quality.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A two-color injection mold, comprising:

the injection molding device comprises a first front mold core, a second front mold core and a rear mold core, wherein the rear mold core is used for being selectively matched with the first front mold core and the second front mold core, when the rear mold core is matched with the first front mold core and is in a mold closing state, the rear mold core and the first front mold core jointly define a first injection molding cavity for molding a semi-finished product, and at least one of the first front mold core and the rear mold core is provided with a concave part and/or a convex part which is positioned in the first injection molding cavity; when the rear mold core is matched with the second front mold core and is in a mold closing state, the rear mold core and the second front mold core jointly define a second injection molding cavity for containing the semi-finished product and forming a finished product on the basis of the semi-finished product in an injection molding mode.

2. The two-color injection mold according to claim 1, characterized in that:

the rear mold core is provided with a rear mold cavity which is used for being matched with the first front mold core to form the first injection molding cavity, and the bottom of the rear mold cavity is provided with the concave part and/or the convex part.

3. The two-color injection mold of claim 2, wherein:

the first front mold core comprises an insert and a blocking piece, and the insert is connected with the blocking piece; the insert is used for filling a part of the rear mold cavity, so that the insert, the blocking piece and the rear mold core together form the first injection molding cavity.

4. The two-color injection mold according to claim 1, characterized in that:

the number of the concave parts or the convex parts is multiple, and the concave parts or the convex parts are arranged at intervals in the extending direction of the first injection molding cavity.

5. The two-color injection mold according to claim 1, characterized in that:

the rear mold core is provided with a first runner communicated with the first injection molding cavity and a second runner communicated with the second injection molding cavity.

6. The two-color injection mold according to claim 5, characterized in that:

the double-color injection mold further comprises an inclined top, the inclined top is embedded in the rear mold core and provided with a first side and a second side which are opposite, a first connecting groove communicated with the first flow channel is formed in the first side, and the first connecting groove is communicated with the first injection molding cavity; and a second connecting groove communicated with the second flow channel is arranged on the second side, and the second connecting groove is communicated with the second injection molding cavity.

7. The two-color injection mold according to claim 6, characterized in that:

the double-color injection mold further comprises an ejector plate, the inclined ejector comprises an ejector block and an ejector rod, the ejector block is embedded in the rear mold core, and the first connecting groove and the second connecting groove are formed in two opposite side walls of the ejector block; the ejector rod is arranged on the ejector plate, the ejector plate is used for driving the ejector rod to lift, and the ejector rod is connected with the ejector block and used for driving the ejector block to be close to or far away from the first front mold core relative to the rear mold core; and when the ejector block drives the finished product to be ejected to separate from the rear mold core, the ejector rod can move relative to the ejector plate to separate from the finished product.

8. The two-color injection mold according to claim 5, characterized in that:

the first front mold core is provided with a plurality of first gates communicated with the first flow channel, and the first gates are arranged at intervals along the extending direction of the first injection molding cavity.

9. The two-color injection mold according to claim 5, characterized in that:

the second front mold core is provided with a plurality of second gates communicated with the second flow channel, and the plurality of second gates are arranged at intervals along the extending direction of the second injection molding cavity.

10. The two-color injection mold according to claim 1, characterized in that:

the number of the rear mold cores is two, and the two rear mold cores are used for being matched with the first front mold core and the second front mold core respectively.

Images