CN221161370U - Mold exhaust structure and injection mold using same - Google Patents

Abstract

The utility model discloses a mold exhaust structure and an injection mold using the same, wherein the injection mold comprises an upper template, a lower template and a lower mold forming insert arranged on the lower template; the lower die is provided with an insert mounting hole penetrating downwards at the molding surface position of the lower die molding insert, and an exhaust assembly is arranged in the insert mounting hole; the exhaust assembly comprises a plurality of exhaust sheets which are sequentially and transversely laminated and respectively arranged vertically, and the surfaces of the exhaust sheets are respectively provided with exhaust grooves which vertically penetrate through and the size of which is determined according to the edge overflow value of the plastic product material; the lower template is provided with an air extraction channel, an air extraction joint is arranged at the opening position of the outer end of the air extraction channel, and the air exhaust grooves of the air exhaust plates are respectively communicated with the inner end of the air extraction channel. Through the structural design, the die exhaust structure has the advantages of novel structural design and low processing and use cost; correspondingly, the injection mold applying the mold exhaust structure also has the advantages of novel structural design and low processing and use cost.

Description

Mold exhaust structure and injection mold using same

Technical Field

The utility model relates to the technical field of injection molds, in particular to a mold exhaust structure and an injection mold using the same.

Background

In the prior art, for the injection mold with thin glue position, large filling area or difficult injection filling, exhaust steel is generally adopted to realize exhaust, for example, patent number is: ZL 202221089554.X, patent name: chinese patent utility model of gas back pressure micropore foaming injection mold, and patent application number is: 202310079514.X, patent name: a high-pressure jet combined negative pressure cavity quick injection mold and a method thereof are disclosed, which all disclose a mold structure for realizing exhaust by adopting exhaust steel.

It should be noted that the air-permeable steel can be exhausted because of its honeycomb-shaped internal structure, but also because of this structure, the molding surface cannot be machined by a grinding machine, and the product surface can be machined only by an EDM machining mode, which makes the exhaust steel machining efficiency lower and the machining cost higher. In addition, after the exhaust steel is produced for a while, there is a problem in that the cost is increased due to the need of replacement due to the contamination, and the contaminated exhaust steel cannot be used continuously.

Disclosure of utility model

The utility model aims to provide a die exhaust structure aiming at the defects of the prior art, and the die exhaust structure is novel in design and low in processing and use cost.

Another object of the present utility model is to provide an injection mold that is novel in structural design and low in processing cost, which addresses the shortcomings of the prior art.

In order to achieve the above object, the present utility model is achieved by the following technical scheme.

The mold exhaust structure is applied to an injection mold, and the injection mold comprises a lower template and a lower mold forming insert arranged on the lower template;

The method is characterized in that: the lower die is provided with an insert mounting hole penetrating downwards at the molding surface position of the lower die molding insert, and an exhaust assembly is arranged in the insert mounting hole;

The exhaust assembly comprises a plurality of exhaust sheets which are sequentially and transversely laminated and respectively arranged vertically, and the surfaces of the exhaust sheets are respectively provided with exhaust grooves which vertically penetrate through and the size of which is determined according to the edge overflow value of the plastic product material;

The lower template is provided with an air extraction channel, an air extraction joint is arranged at the opening position of the outer end of the air extraction channel, and the air exhaust grooves of the air exhaust plates are respectively communicated with the inner end of the air extraction channel.

The lower die forming inserts are fastened to the lower die plates through locking screws in a threaded mode, clamping shoulders are respectively arranged at the lower end portions of the exhaust sheets, and the clamping shoulders of the exhaust sheets are respectively clamped and fastened between the lower die forming inserts and the lower die plates.

And a sealing rubber ring encircling the periphery of the opening at the inner end of the air exhaust channel is clamped between the lower die forming insert and the lower die plate.

An injection mold comprises an upper template, a lower template and a lower mold forming insert arranged on the lower template; the injection mold further comprises the mold exhaust structure.

Compared with the prior art, the utility model has the following beneficial effects: the mold exhaust structure disclosed by the utility model realizes exhaust in injection molding through the exhaust component, the exhaust channel and the exhaust connector, so as to meet the exhaust requirement of an injection mold with thin product glue position, large filling area or difficult injection filling. The exhaust assembly is assembled by a plurality of exhaust sheets and can be reused, so that the use cost can be obviously reduced; in other words, the exhaust grooves of each exhaust sheet can be directly machined by a grinding machine, and a DM machining mode with higher E machining cost and lower machining efficiency is not needed, namely, the machining cost of the exhaust component is lower. Therefore, the mold exhaust structure has the advantages of novel structural design and low processing and use cost. Correspondingly, the injection mold with the mold exhaust structure has the advantages of novel structural design and low processing and use cost.

Drawings

The utility model will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the utility model.

FIG. 1 is a schematic view of an injection mold according to the present utility model in semi-section.

Fig. 2 is a schematic structural view of an exhaust assembly according to the present utility model.

Fig. 3 is a schematic structural view of an exhaust sheet of the present utility model.

Fig. 1 to 3 include:

1-lower template; 2-lower die molding insert; 21-insert mounting holes; 3-an exhaust assembly; 31-exhaust sheets; 311-an exhaust groove; 312-a catch shoulder; 4-an air extraction channel; 5-an air extraction joint; 6, sealing the rubber ring; 7-upper template; 8-forming chamber.

Detailed Description

The utility model will be described with reference to specific embodiments.

In a first embodiment, as shown in fig. 1, a mold venting structure is applied to an injection mold, and the injection mold includes a lower mold plate 1 and a lower mold molding insert 2 mounted on the lower mold plate 1.

Specifically, as shown in fig. 1, an insert mounting hole 21 penetrating downward is formed in the molding surface of the lower mold molding insert 2, and the exhaust assembly 3 is installed in the insert mounting hole 21.

Further, as shown in fig. 2 and 3, the exhaust assembly 3 includes a plurality of exhaust sheets 31 which are sequentially and transversely stacked and respectively arranged vertically, and the surface of each exhaust sheet 31 is respectively provided with an exhaust slot 311 which vertically penetrates and the size of which is determined according to the edge overflow value of the plastic product material.

In addition, the lower die plate 1 is provided with an air extraction channel 4, and the lower die plate 1 is provided with an air extraction joint 5 at the opening position of the outer end of the air extraction channel 4, and the air exhaust grooves 311 of the air exhaust plates are respectively communicated with the inner end of the air extraction channel 4. It should be noted that the suction connection 5 is connected to the respective suction device via the respective suction line.

In the first embodiment, the step of applying the mold exhaust structure to an injection mold and performing injection molding processing on a plastic product is as follows:

Step a, the injection mold is closed, before the molten rubber is injected into the molding cavity 8, the molding cavity 8 of the injection mold is filled with air, and the molding cavity 8, the exhaust grooves 311 of the exhaust sheets 31 and the exhaust channel 4 of the lower template 1 are communicated;

Step b, starting an air extracting device and extracting air from the molding cavity 8 through the air extracting device, wherein in the process, air in the molding cavity 8 is extracted to the outside of the injection mold through a plurality of air exhaust grooves 311 of the air exhaust assembly 3 and the air exhaust channels 4, and at the moment, an injection molding space which is close to a vacuum environment and has a certain negative pressure is formed in the molding cavity 8 of the injection mold;

Step c, after the air suction action is started, the injection molding machine injects the melt adhesive into the molding cavity 8, and in the process, the molding cavity 8 is in a negative pressure environment, namely, the melt adhesive can rapidly and smoothly fill the molding cavity 8 and injection-mold plastic products;

Step d, after the molten rubber entering the forming cavity 8 is filled in the position of the exhaust groove 311 of the exhaust assembly 3, the exhaust groove 311 cannot exhaust air due to the filling of the rubber, and the air exhaust pressure gauge of the air exhaust rotating shaft also displays the rising of the air exhaust pressure, so that the air exhaust action is stopped;

Step e, after the plastic product is completely molded, the injection mold performs mold opening action, and the plastic product is taken out of the injection mold;

And f, after the plastic product is demoulded, performing actions according to the steps a-e and completing injection molding of the next plastic product.

It should be noted that, after the injection mold works for a period of time, the exhaust assembly 3 will block the exhaust slot 311 due to dirt such as plastic residual glue, and only the exhaust assembly 3 needs to be disassembled, cleaned, and reinstalled for continuous use.

It should be emphasized that the mold exhaust structure of the first embodiment is matched with the exhaust assembly 3, the exhaust channel 4 and the exhaust connector 5 to realize the exhaust during injection molding, so as to meet the exhaust requirement of the injection mold with thin glue level, large filling area or difficult injection filling. The exhaust assembly 3 is assembled by a plurality of exhaust sheets 31, and the exhaust assembly 3 can be reused, so that the use cost can be obviously reduced; further, the exhaust grooves 311 of the exhaust sheets 31 can be directly machined by a grinding machine, and the DM machining mode, which is higher in E machining cost and lower in machining efficiency, i.e., the machining cost of the exhaust assembly 3 of the first embodiment is lower, is not required.

Through above-mentioned structural design, the mould exhaust structure of this embodiment one has structural design novel, processing use cost low advantage.

In the second embodiment, as shown in fig. 1 to 3, the difference between the second embodiment and the first embodiment is that the exhaust component 3 of the second embodiment can be installed in a clamping manner, and in order to meet the requirement of disassembly and assembly, the second embodiment can adopt the following structural design: the lower die molding insert 2 is fastened to the lower die plate 1 by screwing a locking screw, the lower end parts of the exhaust sheets 31 are respectively provided with a clamping shoulder 312, and the clamping shoulders 312 of the exhaust sheets 31 are respectively fastened between the lower die molding insert 2 and the lower die plate 1.

As shown in fig. 1, the third embodiment is different from the first embodiment in that: a sealing rubber ring 6 surrounding the periphery of the opening at the inner end of the air suction channel 4 is clamped between the lower die molding insert 2 and the lower die plate 1.

The sealing rubber ring 6 of the third embodiment can ensure the sealing performance of the opening position of the upper end of the air suction channel 4.

In the fourth embodiment, as shown in fig. 1, an injection mold comprises an upper die plate 7, a lower die plate 1, and a lower mold molding insert 2 mounted on the lower die plate 1.

In addition, the injection mold further comprises the mold exhaust structure.

Because the above-mentioned mould exhaust structure has structural design novel, processing use cost advantage low, the injection mold of this embodiment fourth also has structural design novel, processing use cost advantage low promptly.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims (4)

1. The mold exhaust structure is applied to an injection mold, and the injection mold comprises a lower template (1) and a lower mold forming insert (2) arranged on the lower template (1);

The method is characterized in that: an insert mounting hole (21) penetrating downwards is formed in the molding surface position of the lower die molding insert (2), and an exhaust assembly (3) is arranged in the insert mounting hole (21);

The exhaust assembly (3) comprises a plurality of exhaust sheets (31) which are sequentially and transversely stacked and are respectively arranged vertically, and the surfaces of the exhaust sheets (31) are respectively provided with an exhaust groove (311) which vertically penetrates and the size of which is determined according to the edge overflow value of the plastic product material;

The lower template (1) is provided with an air extraction channel (4), and the lower template (1) is provided with an air extraction joint (5) at the opening position of the outer end of the air extraction channel (4), and the air exhaust grooves (311) of the air exhaust plates are respectively communicated with the inner end of the air extraction channel (4).

2. A mold vent structure according to claim 1, wherein: the lower die forming insert (2) is fastened to the lower die plate (1) through locking screws in a threaded mode, clamping shoulders (312) are respectively arranged at the lower end portions of the exhaust sheets (31), and the clamping shoulders (312) of the exhaust sheets (31) are respectively clamped and fastened between the lower die forming insert (2) and the lower die plate (1).

3. A mold vent structure according to claim 1, wherein: and a sealing rubber ring (6) encircling the periphery of the inner end opening of the air suction channel (4) is clamped between the lower die forming insert (2) and the lower die plate (1).

4. An injection mold comprises an upper mold plate (7), a lower mold plate (1) and a lower mold molding insert (2) arranged on the lower mold plate (1);

The method is characterized in that: the injection mold further comprising a mold vent structure according to any one of claims 1-3.