CN-224210424-U - Forming exhaust system based on double-shot mold and double-shot mold

Abstract

The application provides a molding exhaust system based on a double-shot injection mold and the double-shot injection mold. The molding exhaust system based on the double-color injection mold comprises a molding front module, a molding rear module and a molding exhaust assembly. The method comprises the steps of closing a die set with a die set before molding when the die set after molding is in a 0-degree state, closing a die set after molding with the die set before molding when the die set after molding is in a 180-degree state, closing a die set before molding when the die set after molding is in a 0-degree state, closing a die set before molding when the die set after molding is in a 180-degree state, and enabling an embedding position of the die set after molding and a glue inlet of the die set after molding to form a 180-degree included angle with the die set before molding.

Inventors

• Zhuang Shaoqian
• LI WENCONG

Assignees

• 惠州速源精密科技有限公司

Dates

Publication Date

20260508

Application Date

20250605

Claims (10)

1. 1. A shaping exhaust system based on double-shot moulding mould for exhaust to the die cavity of second set injection moulding mould, its characterized in that, shaping exhaust system based on double-shot moulding mould includes: A molding front module; The post-molding die set is matched with the pre-molding die set when the post-molding die set is in a 0-degree state, so that a first color annular plastic part is injection molded by a cavity of a first set of injection molding die, and is matched with the pre-molding die set when the post-molding die set is in a 180-degree state, so that a second color annular plastic part is injection molded by a cavity of a second set of injection molding die, and the second color annular plastic part is bonded with the first color annular plastic part; The molding exhaust assembly is embedded into a mold core of the molding rear module, the molding rear module is matched with the molding front module when being in a 0-degree state, the molding exhaust assembly is used for molding an exhaust groove on the first color annular plastic part, the exhaust groove penetrates through the upper end face and the lower end face of the first color annular plastic part, the molding rear module is matched with the molding front module when being in a 180-degree state, an included angle of 180 degrees exists between the embedding position of the molding exhaust assembly and a glue inlet of the second set of injection mold, and at the moment, the molding exhaust assembly is used for exhausting the cavity of the second set of injection mold.
2. 2. The molding exhaust system based on the double-shot injection mold according to claim 1, wherein the molding exhaust assembly comprises a plurality of exhaust inserts, the exhaust inserts are sequentially abutted, an exhaust channel is formed between two adjacent exhaust inserts in a surrounding mode, and the exhaust channel is communicated with a cavity of the second injection mold.
3. 3. The molding exhaust system based on the double-shot injection mold according to claim 2, wherein the exhaust channel comprises a primary exhaust channel and a secondary exhaust channel which are communicated, the primary exhaust channel is communicated with the cavity of the second set of injection mold, and the secondary exhaust channel is used for being communicated with the external environment.
4. 4. The two-shot injection mold-based molding exhaust system according to claim 2, wherein one end of each exhaust insert facing away from the cavity of the second set of injection mold is provided with a through hole; The forming exhaust assembly further comprises a connecting column, and the connecting column sequentially penetrates through the penetrating holes to fix the exhaust inserts in series.
5. 5. The molding exhaust system based on the double-shot injection mold of claim 4, wherein the mold core of the molded mold set is provided with an insert positioning hole and a sinking groove which are vertically communicated, the insert positioning hole is communicated with the cavity of the second set of injection mold, the sinking groove is positioned at the back of the mold core of the molded mold set, a plurality of exhaust inserts are arranged in the insert positioning hole, and the connecting column is arranged in the sinking groove.
6. 6. A two-shot injection mold-based molding vent system in accordance with claim 3, wherein the primary vent passage has a vent gap value of 0.02mm and the secondary vent passage has a vent gap value in the range of 0.2mm to 0.4mm.
7. 7. The two-shot injection mold-based molding exhaust system according to claim 3, wherein a three-stage exhaust passage is formed in the back of the mold core of the molded mold, one end of the three-stage exhaust passage is communicated with the two-stage exhaust passage, and the other end of the three-stage exhaust passage is communicated with a back top pinhole of the mold core of the molded mold.
8. 8. The two-shot mold-based molding exhaust system according to claim 7, wherein, the molding exhaust assembly also comprises at least two exhaust inserts, the two exhaust inserts are embedded in the mold core of the molded mold set, and the two exhaust insert pins are respectively positioned at two sides of the embedding positions of the exhaust inserts, and are used for exhausting the cavity of the second set of injection mold.
9. 9. The two-shot injection mold-based molding exhaust system according to claim 8, wherein the back of the mold core of the post-molding mold set is further provided with at least two hanging-table positioning holes, the two hanging-table positioning holes are used for positioning hanging tables of the corresponding exhaust insert pins, and the two hanging-table positioning holes are communicated with the three-stage exhaust passage, and/or, The glue feeding structure of the first set of injection mold is a point glue feeding structure, and the glue feeding structure of the second set of injection mold is a ox horn glue feeding structure.
10. 10. A two-shot injection mold comprising the two-shot injection mold-based molding exhaust system of any one of claims 1-9.

Description

Forming exhaust system based on double-shot mold and double-shot mold Technical Field The utility model relates to the technical field of double-shot injection molds, in particular to a molding exhaust system based on a double-shot injection mold and the double-shot injection mold. Background Two-color molds, namely two plastic materials are molded on the same injection molding machine and are molded in two times, but the product is only ejected from the mold once, and the two-color molds need to be matched with a special two-color injection molding machine for injection molding. In the prior art, in the injection molding process, after a first set of injection mold forms a first color plastic part, a rear mold of the first set of injection mold rotates 180 degrees and is aligned and clamped with a front mold of a second set of injection mold, but due to the difference of exhaust requirements of a molding exhaust system of the second set of injection mold and a molding exhaust system of the first set of injection mold, how to ensure that a second color plastic part can be fully exhausted in an injection molding process becomes a problem to be solved urgently. That is, if the cavity can not be fully exhausted during the injection molding process, the second color plastic part is easy to be trapped or insufficiently filled, so that the bonding effect of the second color plastic part and the first color plastic part is poor, and the injection molding device is especially aimed at an annular bicolor product with a thinner structure. The thin annular bicolor product shown in fig. 1 and 2 comprises a first color annular plastic part 11 and a second color annular plastic part 12 which are spliced, wherein the first color annular plastic part 11 and the second color annular plastic part 12 are provided with appearance molding surfaces, so that the problem that the second color annular plastic part 12 cannot suffer from air trapping, insufficient filling or glue leakage is solved, namely that the appearance molding surface of the second color annular plastic part 12 cannot suffer from obvious bonding defects with the first color annular plastic part 11. Disclosure of utility model The utility model aims to overcome the defects in the prior art and provide a double-color injection mold-based molding exhaust system and a double-color injection mold, which can avoid obvious bonding defects of a second-color annular plastic part and a first-color annular plastic part, and better ensure the molding quality of two bonding. The aim of the utility model is realized by the following technical scheme: a molding exhaust system based on double-shot mold for exhausting to the die cavity of second set injection mold, the molding exhaust system based on double-shot mold includes: A molding front module; The post-molding die set is matched with the pre-molding die set when the post-molding die set is in a 0-degree state, so that a first color annular plastic part is injection molded by a cavity of a first set of injection molding die, and is matched with the pre-molding die set when the post-molding die set is in a 180-degree state, so that a second color annular plastic part is injection molded by a cavity of a second set of injection molding die, and the second color annular plastic part is bonded with the first color annular plastic part; The molding exhaust assembly is embedded into a mold core of the molding rear module, the molding rear module is matched with the molding front module when being in a 0-degree state, the molding exhaust assembly is used for molding an exhaust groove on the first color annular plastic part, the exhaust groove penetrates through the upper end face and the lower end face of the first color annular plastic part, the molding rear module is matched with the molding front module when being in a 180-degree state, an included angle of 180 degrees exists between the embedding position of the molding exhaust assembly and a glue inlet of the second set of injection mold, and at the moment, the molding exhaust assembly is used for exhausting the cavity of the second set of injection mold. In one embodiment, the molding exhaust assembly comprises a plurality of exhaust inserts, and the exhaust inserts are sequentially abutted against each other, so that two adjacent exhaust inserts are jointly surrounded to form an exhaust channel, and the exhaust channel is communicated with the cavity of the second set of injection mold. In one embodiment, the exhaust channel comprises a primary exhaust channel and a secondary exhaust channel which are communicated, wherein the primary exhaust channel is communicated with the cavity of the second set of injection mold, and the secondary exhaust channel is used for being communicated with the external environment. In one embodiment, a through hole is formed at one end of each exhaust insert, which is away from the cavity of the second set of injection mold; The forming exha