Forming exhaust system based on double-color injection mold and double-color injection mold

Abstract

The utility model provides a forming exhaust system based on a double-color injection mold and the double-color injection mold. The molding exhaust system based on the double-color injection mold comprises a front molding module, a rear molding module and a molding exhaust assembly. When the forming rear module is in a 0-degree state, the forming rear module is combined with the forming front mold, so that a first-color annular plastic part is formed in a cavity of the first injection mold in an injection molding manner, and when the forming rear module is in a 180-degree state, a second-color annular plastic part is formed in a cavity of the second injection mold in an injection molding manner; the second-color annular plastic part is bonded with the first-color annular plastic part; when the forming rear module is in a 0-degree state, the forming rear module and the forming front mold are combined, and the forming exhaust assembly is used for forming an exhaust groove in a first-color annular plastic part; when the forming rear module is in a 180-degree state, the forming rear module is combined with the forming front mold, an included angle of 180 degrees is formed between the embedding position of the forming exhaust assembly and a glue inlet of the second set of injection mold, and at the moment, the forming exhaust assembly is used for exhausting air in a cavity of the second set of injection mold.

Description

Technical Field

[0001] This utility model relates to the field of two-color injection mold technology, and in particular to a molding venting system based on a two-color injection mold and a two-color injection mold. Background Technology

[0002] Two-color molds are molds made by injecting two plastic materials on the same injection molding machine in two stages, but the product is only ejected from the mold once. They require a special two-color injection molding machine for injection molding.

[0003] In existing two-color injection molds, during the injection molding process, after the first set of injection molds has formed the first color plastic part, the rear mold of the first set of injection molds rotates 180° and aligns with the front mold of the second set of injection molds to close the mold. However, due to the difference in venting requirements between the molding venting system of the second set of injection molds and the molding venting system of the first set of injection molds, ensuring that the cavity of the second color plastic part can be fully vented during the injection molding process has become an urgent problem to be solved.

[0004] In other words, if the cavity cannot be adequately vented during the injection molding process of the second-color plastic part, it can easily lead to trapped air or insufficient filling, resulting in poor adhesion between the second-color and first-color plastic parts, especially for thin-structured ring-shaped two-color products. For example... Figure 1 and Figure 2 The thin, ring-shaped, two-color product shown includes a first-color ring-shaped plastic part 11 and a second-color ring-shaped plastic part 12 that are spliced ​​together. Both the first-color ring-shaped plastic part 11 and the second-color ring-shaped plastic part 12 have an appearance molding surface, which requires that the second-color ring-shaped plastic part 12 must not have problems such as air trapping, insufficient filling, or glue leakage. That is, it requires that the appearance molding surface of the second-color ring-shaped plastic part 12 must not have obvious adhesion defects with the first-color ring-shaped plastic part 11. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a molding venting system and a two-color injection mold that can avoid obvious adhesion defects between the second-color annular plastic part and the first-color annular plastic part, thus better ensuring the molding quality of the two adhered parts.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A molding venting system based on a two-color injection mold is used to vent air from the cavity of a second injection mold. The molding venting system based on the two-color injection mold includes:

[0008] Pre-forming module;

[0009] After molding, the molded module is combined with the pre-molding mold when it is at 0°, so that the cavity of the first set of injection molds is injection molded into a first color ring-shaped plastic part. When the molded module is at 180°, it is combined with the pre-molding mold, so that the cavity of the second set of injection molds is injection molded into a second color ring-shaped plastic part, and the second color ring-shaped plastic part is bonded to the first color ring-shaped plastic part.

[0010] A molding venting component is embedded in the mold core of the molding post-molding module. When the molding post-molding module is in a 0° state, it is combined with the molding pre-molding module. The molding venting component is used to form venting grooves on the first color ring-shaped plastic part, and the venting grooves penetrate the upper and lower end faces of the first color ring-shaped plastic part. When the molding post-molding module is in a 180° state, it is combined with the molding pre-molding module. The embedded position of the molding venting component has a 180° angle with the sprue of the second set of injection molds. At this time, the molding venting component is used to vent the cavity of the second set of injection molds.

[0011] In one embodiment, the molding venting assembly includes a plurality of venting inserts; the plurality of venting inserts abut against each other in sequence, such that two adjacent venting inserts together form a venting channel, the venting channel being connected to the cavity of the second injection mold.

[0012] In one embodiment, the exhaust channel includes a primary exhaust channel and a secondary exhaust channel that are connected to each other; the primary exhaust channel is connected to the cavity of the second injection mold, and the secondary exhaust channel is used to connect to the external environment.

[0013] In one embodiment, each of the venting inserts has a through hole at one end facing away from the cavity of the second injection mold.

[0014] The molded exhaust assembly also includes connecting posts, which are sequentially inserted through multiple through holes to connect and fix multiple exhaust inserts in series.

[0015] In one embodiment, the mold core of the molded module has a vertically connected insert positioning hole and a recess; the insert positioning hole is connected to the cavity of the second injection mold, and the recess is located on the back of the mold core of the molded module; a plurality of venting inserts are provided in the insert positioning hole, and the connecting post is provided in the recess.

[0016] In one embodiment, the exhaust gap value of the primary exhaust channel is 0.02 mm, and the exhaust gap value of the secondary exhaust channel ranges from 0.2 mm to 0.4 mm.

[0017] In one embodiment, the mold core of the molded module has a three-stage venting channel on its back. One end of the three-stage venting channel is connected to the two-stage venting channel, and the other end of the three-stage venting channel is connected to the ejector pin hole on the back of the mold core of the molded module.

[0018] In one embodiment, the molding venting assembly further includes at least two venting pins, both of which are embedded in the core of the molded post-molding module, and the two venting pins are respectively located on both sides of the embedding positions of the plurality of venting inserts, and the two venting pins are used to vent the cavity of the second injection mold.

[0019] In one embodiment, the back of the mold core of the molded module is further provided with at least two mounting holes, which are used to position the mounting bases of the corresponding exhaust pins, and both mounting holes are connected to the three-stage exhaust channel; and / or,

[0020] The first set of injection molds has a dot injection structure, while the second set of injection molds has a horn injection structure.

[0021] A two-color injection mold, comprising the molding venting system based on the two-color injection mold described in any of the above embodiments.

[0022] Compared with the prior art, the present invention has at least the following advantages:

[0023] This invention relates to a molding venting system based on a two-color injection mold. A molding venting component is embedded in the core of the molded post-molding mold. When the molded post-molding mold is at 0° and closed, the molding venting component can simultaneously form venting grooves on the first-color annular plastic part during injection molding of the first-color annular plastic part in the cavity of the first injection mold. When the molded post-molding mold is at 180° and closed, even during injection molding of the second-color annular plastic part in the cavity of the second injection mold, the adhesive is injected through the inlet of the second injection mold. This ensures that the adhesive disperses and fills the venting component along the same path, filling the venting grooves on the first-color annular plastic part. This evenly vents air from the cavity of the second injection mold through the embedded location of the molding venting component, preventing air trapping, insufficient filling, or adhesive leakage in the second-color annular plastic part. Consequently, it avoids significant adhesion defects between the second and first-color annular plastic parts, thus effectively ensuring the molding quality of the two bonded parts. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 It is a thin, ring-shaped, two-color product;

[0026] Figure 2 A cross-sectional view of a thin, ring-shaped, two-color product;

[0027] Figure 3 This is a schematic diagram of the molding venting system based on a two-color injection mold in one embodiment;

[0028] Figure 4 for Figure 3 The diagram shows the structure of the molding venting system based on a two-color injection mold.

[0029] Figure 5 for Figure 3 The diagram shows the structure of the molding venting system based on a two-color injection mold.

[0030] Figure 6 for Figure 3 The diagram shows the structural schematic of the molding venting component of the molding venting system based on a two-color injection mold.

[0031] Figure 7 for Figure 3 The diagram shown is an exploded view of the molding venting system based on a two-color injection mold.

[0032] Figure 8 This is an exploded view of the structure of a two-color injection mold;

[0033] Reference numerals: Molding venting system 10 based on a two-color injection mold; first-color annular plastic part 11; second-color annular plastic part 12; venting groove 13; pre-molding module 100; post-molding module 200; insert positioning hole 201; recess 202; three-stage venting channel 203; mounting plate positioning hole 204; injection port 205; molding venting assembly 300; venting insert 310; through hole 3101; venting channel 301; primary venting channel 3011; secondary venting channel 3012; connecting post 320; venting pin 330; first injection mold 10a; second injection mold 10b. Detailed Implementation

[0034] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] This disclosure provides a molding venting system based on a two-color injection mold for venting the cavity of a second injection mold. The molding venting system based on the two-color injection mold includes a pre-molding module, a post-molding module, and a molding venting assembly. When the post-molding module is in a 0° state, it is combined with the pre-molding mold to allow the cavity of the first injection mold to be injection molded into a first-color ring-shaped plastic part. When the post-molding module is in a 180° state, it is combined with the pre-molding mold to allow the cavity of the second injection mold to be injection molded into a second-color ring-shaped plastic part, thus bonding the second-color ring-shaped plastic part to the first-color ring-shaped plastic part. The molding venting component is embedded in the core of the post-molding module. When the post-molding module is in a 0° state, it is combined with the pre-molding mold. The molding venting component is used to form venting grooves on the first-color ring-shaped plastic part, and the venting grooves penetrate the upper and lower end faces of the first-color ring-shaped plastic part. When the post-molding module is in a 180° state, it is combined with the pre-molding mold. The embedded position of the molding venting component has a 180° angle with the sprue of the second injection mold. At this time, the molding venting component is used to vent the cavity of the second injection mold.

[0038] Please see Figures 1 to 8 To better understand the molding venting system 10 based on a two-color injection mold of this application, the molding venting system 10 based on a two-color injection mold will be further explained below:

[0039] One embodiment of the molding venting system 10 based on a two-color injection mold includes a pre-molding module 100, a post-molding module 200, and a molding venting assembly 300. When the post-molding module 200 is in a 0° state, it closes with the pre-molding module 100, allowing the cavity of the first injection mold 10a to injection mold a first-color annular plastic part 11. When the post-molding module 200 is in a 180° state, it closes with the pre-molding module 100, allowing the cavity of the second injection mold 10b to injection mold a second-color annular plastic part 12, bonding the second-color annular plastic part 12 to the first-color annular plastic part 11. The molding venting assembly 300 is embedded in the core of the post-molding module 200, which is in a 0° state. When the molding module 200 is in the pre-molding module 100, the molding venting component 300 is used to mold the venting groove 13 on the first colored ring-shaped plastic part 11, and the venting groove 13 penetrates the upper and lower end faces of the first colored ring-shaped plastic part 11; when the molding module 200 is in the 180° state, it is molded with the pre-molding module 100, and the embedded position of the molding venting component 300 has a 180° angle with the glue inlet 205 of the second set of injection molds 10b. At this time, the molding venting component 300 is used to vent the cavity of the second set of injection molds 10b.

[0040] In this embodiment, the molding venting system 10 based on a two-color injection mold of this invention, through the molding venting component 300 embedded in the core of the molded post-molding module 200, allows the molding venting component 300 to be used to simultaneously mold the first-color annular plastic part 11 in the cavity of the first injection mold 10a and the venting groove 13 on the first-color annular plastic part 11 when the molded post-molding module 200 is in the 180° state and the mold is closed, so that even during the process of the second-color annular plastic part 12 being molded in the cavity of the second injection mold 10b, the adhesive liquid... The glue is injected through the sprue 205 of the second injection mold 10b, ensuring that the glue is dispersed and filled along the same path to the embedding position of the molding venting component 300. This allows the glue to fill the venting groove 13 on the first colored annular plastic part 11, so that the air in the cavity of the second injection mold 10b is evenly discharged through the embedding position of the molding venting component 300. This avoids problems such as air trapping, insufficient filling, or glue leakage in the second colored annular plastic part 12, and thus avoids obvious bonding defects between the second colored annular plastic part 12 and the first colored annular plastic part 11. This better ensures the molding quality of the two bonded parts.

[0041] It should be noted that the molding cavity of the front mold core of the first injection mold 10a is not entirely the same as that of the front mold core of the second injection mold 10b. Specifically, regardless of whether the rear mold core of the first injection mold 10a or the rear mold core of the second injection mold 10b is closed with the front mold core of the first injection mold 10a, a first molding cavity will be formed. This first molding cavity is used to mold the first-color annular plastic part 11. Similarly, regardless of whether the rear mold core of the first injection mold 10a or the rear mold core of the second injection mold 10b is closed with the front mold core of the second injection mold 10b, a second molding cavity will be formed. This second molding cavity is used to mold the second-color annular plastic part 12. The injection molding principle of the two-color injection mold is existing technology and will not be elaborated here.

[0042] like Figures 1 to 5 As shown, in one embodiment, the molding venting assembly 300 includes a plurality of venting inserts 310; the plurality of venting inserts 310 abut against each other in sequence, such that two adjacent venting inserts 310 together form a venting channel 301, the venting channel 301 being connected to the cavity of the second injection mold 10b.

[0043] It is understood that the molded module 200 is fixedly mounted on the turntable, and can be rotated 180° by the turntable. At this time, the molded module 200 and the pre-molding module 100 are closed, so that the embedded position of the molding venting component 300 has a 180° angle with the inlet 205 of the second injection mold 10b. This results in multiple venting inserts 310 having a 180° angle with the inlet 205 of the second injection mold 10b. Furthermore, because the multiple venting inserts 310 form the first colored annular plastic part 1... The venting groove 13 on the first color injection mold 11 allows the adhesive to be dispersed and filled into the venting groove 13. This means that the adhesive can be dispersed and filled into multiple venting inserts 310 along the same path, so that the air in the cavity of the second injection mold 10b can be evenly discharged through the venting channel 301. This avoids problems such as air trapping, insufficient filling, or adhesive leakage in the second color annular plastic part 12, and thus avoids obvious bonding defects between the second color annular plastic part 12 and the first color annular plastic part 11. This better ensures the molding quality of the two bonding parts.

[0044] like Figures 6 to 8 As shown, in one embodiment, the exhaust channel 301 includes a primary exhaust channel 3011 and a secondary exhaust channel 3012 that are connected to each other; the primary exhaust channel 3011 is connected to the cavity of the second injection mold 10b, and the secondary exhaust channel 3012 is used to connect to the external environment. In one embodiment, the exhaust gap value of the primary exhaust channel 3011 is 0.02 mm, and the exhaust gap value of the secondary exhaust channel 3012 is in the range of 0.2 mm to 0.4 mm.

[0045] It is understood that in this embodiment, by setting the exhaust gap value of the primary exhaust channel 3011 to 0.02mm, specifically making the exhaust gap value 0.02mm less than the overflow value of the glue injected into the cavity of the second injection mold 10b, it is ensured that the air in the cavity of the second injection mold 10b can be discharged sequentially from the primary exhaust channel 3011 and the secondary exhaust channel 3012, and the glue overflow into the primary exhaust channel 3011 is avoided.

[0046] like Figures 4 to 7 As shown, in one embodiment, each of the venting inserts 310 has a through hole 3101 at one end facing away from the cavity of the second injection mold 10b; the molding venting assembly 300 also includes a connecting post 320, which is sequentially inserted through a plurality of the through holes 3101 to connect and fix the plurality of venting inserts 310 in series. In one embodiment, the core of the molded module 200 has a vertically connected insert positioning hole 201 and a recess 202; the insert positioning hole 201 is connected to the cavity of the second injection mold 10b, and the recess 202 is located on the back of the core of the molded module 200; the plurality of venting inserts 310 are disposed in the insert positioning hole 201, and the connecting post 320 is disposed in the recess 202.

[0047] It is understood that in this embodiment, multiple venting inserts 310 are connected in series and fixed at one end away from the cavity of the second injection mold 10b by the connecting post 320. This makes it easier for production personnel to first connect and fix multiple venting inserts 310 in series, and then position and install multiple venting inserts 310 together into the insert positioning hole 201. The connecting post 320 is located in the recess 202, thereby improving the flexibility of assembling the venting inserts 310 and the convenience of installation.

[0048] like Figure 7 and Figure 8 As shown, in one embodiment, the mold core of the molded post-molding module 200 has a three-stage venting channel 203 on its back. One end of the three-stage venting channel 203 is connected to the secondary venting channel 3012, and the other end is connected to the ejector pin hole on the back of the mold core of the molded post-molding module 200. In this way, air in the cavity of the second injection mold 10b can be discharged sequentially through the primary venting channel 3011, the secondary venting channel 3012, and the tertiary venting channel 203, ultimately allowing the air to enter the ejector pin hole on the back of the mold core of the molded post-molding module 200. This allows the air to be discharged from the molded post-molding module 200 through the sliding gap between the ejector pin and the ejector pin hole, thus cleverly and rationally utilizing the structural design of the molded post-molding module 200 to effectively discharge air from the cavity of the second injection mold 10b.

[0049] It should be noted that, typically, ejector pins are sequentially inserted into the rear mold plate and the rear mold core of the injection mold. The sliding clearance between the ejector pins and the rear mold plate is relatively large, while the sliding clearance between the ejector pins and the rear mold core is relatively small. Since the three-stage venting channel 203 is located on the back of the mold core of the molded mold assembly 200, even if the three-stage venting channel 203 can connect with the sliding clearance between the ejector pins and the rear mold plate, the exhausted air can be directly discharged through the sliding clearance between the ejector pins and the rear mold plate.

[0050] like Figures 4 to 7 As shown, in one embodiment, the molding venting assembly 300 further includes at least two venting pins 330. Both venting pins 330 are embedded in the mold core of the molded module 200, and are located on either side of the embedding positions of the plurality of venting inserts 310. The two venting pins 330 are used to vent the cavity of the second injection mold 10b. In one embodiment, at least two mounting holes 204 are also provided on the back of the mold core of the molded module 200. The two mounting holes 204 are used to position the mountings of the corresponding venting pins 330, and both mounting holes 204 are connected to the three-stage venting channel 203.

[0051] It is understood that in this embodiment, by adding at least two venting pins 330 located on both sides of the embedding position of multiple venting inserts 310, auxiliary venting is performed on the air in the cavity of the second injection mold 10b, thereby increasing the air discharge rate.

[0052] like Figures 3 to 5 As shown, in one embodiment, the injection structure of the first injection mold 10a is a dot injection structure, and the injection structure of the first injection mold 10a is a horn injection structure.

[0053] It is understood that in this embodiment, since the first-color annular plastic part 11 has splicing gaps, the second-color annular plastic part 12 can be spliced ​​and assembled with the first-color annular plastic part 11 through the splicing gaps. Specifically, the first injection mold 10a can directly inject glue at the splicing gaps by dot injection, while the second injection mold 10b can inject and mold the second-color annular plastic part 12 at the splicing gaps by horn injection. This allows the second-color annular plastic part 12 to be directly bonded to the first-color annular plastic part 11 after molding, while covering the glue inlet 205 of the first-color annular plastic part 11, thereby effectively ensuring that the first-color annular plastic part 11 and the second-color annular plastic part 12 have good appearance molding surfaces.

[0054] This application also provides a two-color injection mold, including the molding venting system 10 based on the two-color injection mold described in any of the above embodiments.

[0055] In this embodiment, the two-color injection mold employs the aforementioned molding venting system based on the two-color injection mold. The molding venting component is embedded in the mold core of the molded post-molding assembly. When the molded post-molding assembly is at 0° and closed, the molding venting component can simultaneously mold venting grooves on the first-color annular plastic part during the injection molding of the first-color annular plastic part in the cavity of the first injection mold. Thus, even when the molded post-molding assembly is at 180° and closed, during the injection molding of the second-color annular plastic part in the cavity of the second injection mold, the adhesive... The glue is injected through the sprue of the second injection mold, ensuring that the path of the glue to the venting component is the same. This allows the glue to fill the venting grooves on the first colored annular plastic part, so that the air in the cavity of the second injection mold can be evenly discharged through the venting component. This avoids problems such as air trapping, insufficient filling, or glue leakage in the second colored annular plastic part, and thus avoids obvious bonding defects between the second colored annular plastic part and the first colored annular plastic part. This better ensures the molding quality of the two parts.

[0056] Compared with the prior art, the present invention has at least the following advantages:

[0057] This invention relates to a molding venting system based on a two-color injection mold. A molding venting component is embedded in the core of the molded post-molding mold. When the molded post-molding mold is at 0° and closed, the molding venting component can simultaneously form venting grooves on the first-color annular plastic part during injection molding of the first-color annular plastic part in the cavity of the first injection mold. When the molded post-molding mold is at 180° and closed, even during injection molding of the second-color annular plastic part in the cavity of the second injection mold, the adhesive is injected through the inlet of the second injection mold. This ensures that the adhesive disperses and fills the venting component along the same path, filling the venting grooves on the first-color annular plastic part. This evenly vents air from the cavity of the second injection mold through the embedded location of the molding venting component, preventing air trapping, insufficient filling, or adhesive leakage in the second-color annular plastic part. Consequently, it avoids significant adhesion defects between the second and first-color annular plastic parts, thus effectively ensuring the molding quality of the two bonded parts.

[0058] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A molding venting system based on a two-color injection mold, used for venting the cavity of a second injection mold, characterized in that, The molding venting system based on a two-color injection mold includes: Pre-forming module; After molding, the molded module is combined with the pre-molding mold when it is at 0°, so that the cavity of the first set of injection molds is injection molded into a first color ring-shaped plastic part. When the molded module is at 180°, it is combined with the pre-molding mold, so that the cavity of the second set of injection molds is injection molded into a second color ring-shaped plastic part, and the second color ring-shaped plastic part is bonded to the first color ring-shaped plastic part. A molding venting component is embedded in the mold core of the molding post-molding module. When the molding post-molding module is in a 0° state, it is combined with the molding pre-molding module. The molding venting component is used to form venting grooves on the first color ring-shaped plastic part, and the venting grooves penetrate the upper and lower end faces of the first color ring-shaped plastic part. When the molding post-molding module is in a 180° state, it is combined with the molding pre-molding module. The embedded position of the molding venting component has a 180° angle with the sprue of the second set of injection molds. At this time, the molding venting component is used to vent the cavity of the second set of injection molds.

2. The molding venting system based on a two-color injection mold according to claim 1, characterized in that, The molding venting assembly includes multiple venting inserts; the multiple venting inserts abut against each other in sequence, so that two adjacent venting inserts together form a venting channel, and the venting channel is connected to the cavity of the second set of injection molds.

3. The molding venting system based on a two-color injection mold according to claim 2, characterized in that, The exhaust channel includes a primary exhaust channel and a secondary exhaust channel that are connected to each other; the primary exhaust channel is connected to the cavity of the second set of injection molds, and the secondary exhaust channel is used to connect to the external environment.

4. The molding venting system based on a two-color injection mold according to claim 2, characterized in that, Each of the aforementioned venting inserts has a through hole at one end facing away from the cavity of the second injection mold. The molded exhaust assembly also includes connecting posts, which are sequentially inserted through multiple through holes to connect and fix multiple exhaust inserts in series.

5. The molding venting system based on a two-color injection mold according to claim 4, characterized in that, The mold core of the molded module has a vertically connected insert positioning hole and a recess; the insert positioning hole is connected to the cavity of the second injection mold, and the recess is located on the back of the mold core of the molded module; a plurality of venting inserts are provided in the insert positioning hole, and the connecting post is provided in the recess.

6. The molding venting system based on a two-color injection mold according to claim 3, characterized in that, The exhaust gap value of the primary exhaust channel is 0.02mm, and the exhaust gap value of the secondary exhaust channel ranges from 0.2mm to 0.4mm.

7. The molding venting system based on a two-color injection mold according to claim 3, characterized in that, The mold core of the molded module has a three-stage venting channel on its back. One end of the three-stage venting channel is connected to the two-stage venting channel, and the other end of the three-stage venting channel is connected to the ejector pin hole on the back of the mold core of the molded module.

8. The molding venting system based on a two-color injection mold according to claim 7, characterized in that, The molding venting assembly further includes at least two venting pins, both of which are embedded in the core of the molded post-molding module, and the two venting pins are respectively located on both sides of the embedding positions of the plurality of venting inserts. The two venting pins are used to vent the cavity of the second injection mold.

9. The molding venting system based on a two-color injection mold according to claim 8, characterized in that, The mold core of the molded module is further provided with at least two mounting holes on its back. These two mounting holes are used to position the mounting bases of the corresponding venting inserts, and both mounting holes are connected to the three-stage venting channel; and / or, The first set of injection molds has a dot injection structure, while the second set of injection molds has a horn injection structure.

10. A two-color injection mold, characterized in that, The molding venting system based on a two-color injection mold, as described in any one of claims 1-9.

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