CN213733191U

CN213733191U - Mould exhaust structure

Info

Publication number: CN213733191U
Application number: CN202022739049.2U
Authority: CN
Inventors: 方迪成; 蒋燕; 黄锐; 黄学佳
Original assignee: SHANTOU POLYTECHNICAL
Current assignee: SHANTOU POLYTECHNICAL
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-07-20
Anticipated expiration: 2030-11-24

Abstract

The utility model relates to a mould exhaust structure, its characterized in that: the mold comprises a mounting groove, an insert mounting seat and a plurality of exhaust inserts, wherein the mounting groove, the insert mounting seat and the exhaust inserts are arranged in a mold cavity of the mold; the insert mounting seat is mounted in the mounting groove, a plurality of exhaust grooves are formed in the insert mounting seat, the bottoms of the exhaust grooves are communicated with the corresponding empty avoiding grooves, each exhaust insert is mounted on the notch of the corresponding exhaust groove, and at least one air guide through hole communicated with the corresponding exhaust groove is formed in each exhaust insert. The exhaust structure of the mold can rapidly exhaust gas in the mold cavity to the outside of the mold, solves the problems of surface defects such as shrinkage, gas trapping, scorching, flow marks and the like in the molding process, and is favorable for improving the qualification rate of injection molding finished products.

Description

Mould exhaust structure

Technical Field

The utility model relates to a mould field, concretely relates to mould exhaust structure.

Background

There are a large number of injection-molded parts in automobile parts, and the injection-molded parts are generally produced by an injection molding processing method, which directly affects the molding quality of finished products. The injection mold is a key device in the production of injection molding parts, and directly influences the quality of finished injection molding parts. In the injection molding process, when plastic in a molten state enters a mold cavity, air in the cavity needs to be discharged instantly, wherein the air comprises air existing in the cavity and a pouring system, water vapor generated by evaporation of water contained in plastic raw materials at high temperature, gas generated by decomposition of the plastic at high temperature, gas generated by volatilization or chemical reaction of certain additives in the plastic, and the like. The exhaust groove is reasonably arranged, so that parameters such as injection pressure, injection time, pressure maintaining time, mold locking pressure and the like can be greatly reduced, the production efficiency is improved, the production cost is reduced, the energy consumption of a machine is reduced, and the molding quality is improved. However, the existing injection mold has low exhaust efficiency, and cannot quickly exhaust gas in a mold cavity, so that the problems of surface defects such as shrinkage, gas trapping, scorching, flow marks and the like occur in the molding process, and the qualification rate of finished products is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a mould exhaust structure is provided, this kind of mould exhaust structure can be fast with the gas outgoing outside of mould die cavity in, solved and appear shrinking, the stranded gas burns, surface defect problems such as flow mark appearing in the forming process, be favorable to improving the off-the-shelf qualification rate of injection molding. The technical scheme is as follows:

the utility model provides a mould exhaust structure which characterized in that: the mold comprises a mounting groove, an insert mounting seat and a plurality of exhaust inserts, wherein the mounting groove, the insert mounting seat and the exhaust inserts are arranged in a mold cavity of the mold; the insert mounting seat is mounted in the mounting groove, a plurality of exhaust grooves are formed in the insert mounting seat, the bottoms of the exhaust grooves are communicated with the corresponding empty avoiding grooves, each exhaust insert is mounted on the notch of the corresponding exhaust groove, and at least one air guide through hole communicated with the corresponding exhaust groove is formed in each exhaust insert.

In the injection molding process, gas in the mold cavity enters the corresponding gas guide channels through the gas guide through holes on the exhaust inserts, then enters the corresponding clearance grooves, and finally is discharged out of the mold through the corresponding exhaust through holes. According to the mold exhaust structure, the plurality of exhaust channels formed by the plurality of air guide through holes and the plurality of exhaust grooves are used for simultaneously guiding out the gas in the mold cavity, the gas in the mold cavity can be rapidly exhausted to the outside of the mold, the exhaust efficiency is effectively improved, the purposes of reducing the injection pressure, the injection time, the pressure maintaining time and the mold locking pressure are achieved, the problems of surface defects such as shrinkage, air trapping, scorching and flow marks in the molding process are solved, and the improvement of the qualified rate of injection molding products is facilitated.

In a preferred scheme, the insert mounting seat is provided with a strip-shaped through hole extending along the left-right direction, a plurality of partition plates sequentially arranged from left to right are arranged in the strip-shaped through hole, and each partition plate divides the strip-shaped through hole into a plurality of exhaust grooves sequentially arranged from left to right; the exhaust insert is detachably mounted on the notch of the exhaust groove. The exhaust inserts are typically attached to the edge of the slot opening of the exhaust slot by a locking anchor bolt.

In a more preferred scheme, two clearance grooves arranged side by side are formed in the groove bottom of the mounting groove, one air guide through hole is formed in the middle of the groove bottom of each clearance groove, and the notches of the two clearance grooves are communicated with the groove bottoms of the exhaust grooves.

In a preferred scheme, the mounting groove is a strip-shaped groove arranged along the left-right direction, and the groove depth of the mounting groove gradually decreases from left to right; the insert mounting seat is detachably mounted in the mounting groove, and the shape and the size of the insert mounting seat are matched with the inner cavity of the mounting groove. By adopting the structure, the fool-proof structure can effectively prevent the insert mounting seat from being fooled when the insert mounting seat is mounted in the mounting groove, and the relative positions of the exhaust grooves and the clearance grooves on the insert mounting seat are ensured to be accurate. The insert mount is typically attached to the bottom of the mounting groove by a locking anchor bolt.

The utility model discloses a mould exhaust structure utilizes a plurality of exhaust passage that a plurality of air guide through-holes and a plurality of air discharge ducts constitute to the gaseous derivation in the mould die cavity simultaneously, can be fast with the gaseous discharge outside the mould in the mould die cavity, effectively improve exhaust efficiency, reach and reduce injection pressure, subtract short injection time, subtract short dwell time and reduce the purpose of mode locking pressure, solved and contracted to appear in the forming process, the stranded gas burns burnt, surface defect problems such as flow mark, be favorable to improving the off-the-shelf qualification rate of injection molding.

Drawings

Fig. 1 is a schematic structural view of a mold venting structure according to a preferred embodiment of the present invention.

Fig. 2 is a schematic view of the completed assembly of the venting structure of the mold shown in fig. 1.

Detailed Description

As shown in fig. 1 and 2, the mold exhaust structure includes an installation groove 1, an insert installation seat 2 and a plurality of exhaust inserts 3, which are arranged in a mold cavity 4 of the mold, wherein two evacuation grooves 101 are arranged side by side at the bottom of the installation groove 1, and an exhaust through hole 102 is arranged at the bottom of the evacuation groove 101; the insert mounting seat 2 is mounted in the mounting groove 1, a plurality of exhaust grooves 201 are formed in the insert mounting seat 2, the bottoms of the exhaust grooves 201 are communicated with the corresponding empty avoiding grooves 101, the exhaust inserts 3 are mounted on the notches of the corresponding exhaust grooves 201 respectively, and the exhaust inserts 3 are provided with air guide through holes 301 communicated with the corresponding exhaust grooves 201.

In this embodiment, the insert mounting base 2 is provided with a strip-shaped through hole 21 extending along the left-right direction, the strip-shaped through hole 21 is provided with a plurality of partition plates 22 arranged in sequence from left to right, and each partition plate 22 divides the strip-shaped through hole 21 into a plurality of exhaust grooves 201 arranged in sequence from left to right; the exhaust insert 3 is detachably mounted on the notch of the exhaust groove 201.

In this embodiment, the mounting groove 1 is a strip-shaped groove arranged along the left-right direction, and the groove depth of the mounting groove 1 gradually decreases from left to right; the insert mounting seat 2 is detachably mounted in the mounting groove 1, and the shape and the size of the insert mounting seat 2 are matched with the inner cavity of the mounting groove 1. With this structure, the insert attachment seat 2 can be effectively fooled when attached to the attachment groove 1, and the relative positions of the vent grooves 201 and the clearance grooves 101 on the insert attachment seat 2 can be ensured to be accurate.

The working principle of the exhaust structure of the mold is briefly described as follows:

in the injection molding process, a plurality of exhaust channels formed by a plurality of air guide through holes 301 and a plurality of exhaust grooves 201 are used for simultaneously guiding out the gas in the mold cavity 4, and then the gas is discharged to the outside of the mold through two clearance grooves 101 and two exhaust through holes 102 in sequence, so that the exhaust efficiency is high, the purposes of reducing the injection pressure, the injection time and the pressure holding time and reducing the mold locking pressure are achieved, the problems of surface defects such as shrinkage, air trapping, scorching, flow marks and the like in the molding process are solved, and the percent of pass of finished injection molded parts is favorably improved.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and all the equivalent or simple changes made according to the structure, the features and the principle of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a mould exhaust structure which characterized in that: the mold comprises a mounting groove, an insert mounting seat and a plurality of exhaust inserts, wherein the mounting groove, the insert mounting seat and the exhaust inserts are arranged in a mold cavity of the mold; the insert mounting seat is mounted in the mounting groove, a plurality of exhaust grooves are formed in the insert mounting seat, the bottoms of the exhaust grooves are communicated with the corresponding empty avoiding grooves, each exhaust insert is mounted on the notch of the corresponding exhaust groove, and at least one air guide through hole communicated with the corresponding exhaust groove is formed in each exhaust insert.

2. The mold venting structure of claim 1, wherein: the insert mounting seat is provided with a strip-shaped through hole extending along the left-right direction, a plurality of partition plates sequentially arranged from left to right are arranged in the strip-shaped through hole, and each partition plate divides the strip-shaped through hole into a plurality of exhaust grooves sequentially arranged from left to right; the exhaust insert is detachably mounted on the notch of the exhaust groove.

3. The mold venting structure of claim 2, wherein: two keep away the dead slot that sets up side by side are seted up to the tank bottom of mounting groove, keep away the tank bottom middle part of dead slot and seted up one the air guide through-hole, the notch of two keep away the dead slot all with each the tank bottom intercommunication of air discharge duct.

4. The mold venting structure of any one of claims 1-3, wherein: the mounting groove is a strip-shaped groove arranged along the left-right direction, and the groove depth of the mounting groove gradually decreases from left to right; the insert mounting seat is detachably mounted in the mounting groove, and the shape and the size of the insert mounting seat are matched with the inner cavity of the mounting groove.