Injection molding exhaust mechanism for injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection exhaust mechanism for an injection mold, which comprises an upper injection mold, a lower injection mold is arranged on one side of the upper injection mold, a feed port is arranged on one side of the upper injection mold, and molding cavities communicated with the feed port are arranged on the inner sides of the upper injection mold and the lower injection mold; exhaust grooves are formed in the two sides of the upper injection mold; one side of the upper injection mold is provided with an exhaust assembly for exhausting air from the forming cavity; a prompting assembly is arranged on one side of the exhaust assembly. The exhaust assembly comprises a sucking pump, when a flow guide pipe is blocked due to molten plastic residues, the sucking pump cannot effectively suck gas on the inner side of an exhaust groove, air pressure on the inner side of the flow guide pipe is reduced, movement of a first sliding plate is observed, the first sliding plate is attached to the top of a connecting pipe, and a worker can rapidly recognize the blocking condition of the flow guide pipe; therefore, measures can be taken in time for cleaning or maintaining, the production interruption time can be shortened by cleaning the blocked flow guide pipe in time, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is a kind of injection molding exhaust mechanism for injection mold. BACKGROUND

[0002] Injection molding is also called injection molding, which is a kind of injection molding method. The advantages of injection molding method are high production speed, high efficiency and automatic operation.

[0003] In the Chinese patent with authorization announcement No. CN221562138U, a kind of injection mold with exhaust structure is disclosed, relate to exhaust structure technical field, to solve the problem that the exhaust structure of existing injection mold only exhausts through two exhaust holes in the process of using, the pressure of exhaust duct is larger, and exhaust lacks effective flow guide mechanism, leading to the problem that exhaust impact is larger and affects normal use of mold. Including injection mold, the two sides of injection mold are provided with base plate;It also includes: exhaust hole, which is arranged at the top position of the injection mold, the exhaust hole is provided with six, six exhaust holes are all communicated with the inner cavity of injection mold, and the upper end of exhaust hole is provided with flow guide pipe, one end of three flow guide pipes is provided with movable frame, flow guide pipe is integrated structure with injection mold and movable frame respectively;Plug-in guide rod, which is arranged at the bottom position of the movable frame, the plug-in guide rod is integrated structure with movable frame.

[0004] The above-mentioned patent has the following defects: in the above-mentioned patent, when the air pump extracts gas from the exhaust groove through the flow guide pipe, the plastic may be thermally decomposed or sintered under the high-temperature and high-pressure injection environment, forming solid residues and solidifying, which may be left in the flow guide pipe. At this time, the plastic material may block the inside of the flow guide pipe, the flow guide pipe is blocked, and the air pump cannot effectively extract the gas inside the exhaust groove, thereby affecting the normal progress of the injection process. Therefore, an injection molding exhaust mechanism for injection mold is proposed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an injection molding exhaust mechanism for injection mold to solve the problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an injection molding exhaust mechanism for injection mold, comprising an upper injection mold, the upper injection mold is provided with a lower injection mold on one side, the upper injection mold is provided with a feed inlet on one side, and the upper injection mold and the lower injection mold are both provided with a molding cavity communicated with the feed inlet inside;

[0007] The upper injection mold is provided with an exhaust groove on both sides;

[0008] The upper injection mold is provided with an exhaust assembly for the exhaust of the molding cavity on one side;

[0009] The exhaust assembly is provided with a prompt assembly on one side;

[0010] The exhaust assembly comprises an air suction pump, the air suction pump is communicated with a flow guide pipe at an air inlet end, the air suction pump is communicated with an exhaust pipe at an air outlet end, and the upper injection mold is connected with a connecting frame on one side through bolts.

[0011] As preferred, one side of the connecting frame is mounted on one side of the air suction pump, and the air inlet end of the flow guide pipe is communicated with the exhaust groove.

[0012] As preferred, the prompt assembly comprises a connecting pipe, a sliding groove is arranged in the connecting pipe, and a second sliding plate is connected with the sliding groove on the inner side in a seamless manner.

[0013] As preferred, a support rod is fixed on the top of the second sliding plate and penetrates through one side of the top of the connecting pipe, and a first sliding plate is fixed on the top of the support rod.

[0014] As preferred, a limiting ring is fixed on the inner wall of the sliding groove, and a through hole is arranged on one side of the limiting ring.

[0015] As preferred, a spring is connected between the second sliding plate and the limiting ring, when the bottom of the first sliding plate is attached to the top of the connecting pipe, the flow guide pipe is in a blocked state, when the top of the second sliding plate is attached to the top of the inner wall of the connecting pipe, the flow guide pipe is in an exhaust state.

[0016] As preferred, one side of the connecting pipe is communicated with the flow guide pipe, and the connecting pipe is in the shape of a cylinder.

[0017] Compared with the prior art, the above technical scheme has the following technical effects:

[0018] I. The air pressure on the inner side of the forming cavity is reduced by the air suction pump before the molten plastic enters the forming cavity, creating a negative pressure environment, which can accelerate the flow of molten plastic into the forming cavity, thereby filling the entire forming cavity faster, and the molten plastic can fill the forming cavity more uniformly and quickly, so that the appearance and internal structure of the product are more consistent and uniform, which helps to improve the overall quality and consistency of the product.

[0019] II. When the flow guide pipe is blocked due to residual molten plastic, the air suction pump cannot effectively extract the gas on the inner side of the exhaust groove, resulting in a decrease in the air pressure on the inner side of the flow guide pipe, the movement of the first sliding plate is observed and attached to the top of the connecting pipe, and the worker can quickly identify the blockage of the flow guide pipe, so that timely measures can be taken for cleaning or repair, and timely cleaning of the blocked flow guide pipe can shorten the production interruption time, thereby improving production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required by the embodiments or prior art description. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0021] Figure 1 The first perspective structural schematic view of the present application;

[0022] Figure 2 The second perspective structural schematic view of the present application;

[0023] Figure 3 The third perspective structural schematic view of the present application;

[0024] Figure 4 The main front view cross-sectional structural schematic view of the connecting pipe of the present application;

[0025] Figure 5 The main front view cross-sectional structural schematic view of the second sliding plate of the present application;

[0026] Figure 6 The structural schematic view of the first sliding plate of the present application.

[0027] The drawing mark explanation: 1, the upper injection mold; 2, the lower injection mold; 3, the feed inlet; 5, the exhaust assembly; 51, the flow guide pipe; 52, the connecting frame; 53, the exhaust pipe; 54, the air pump; 6, the prompt assembly; 61, the connecting pipe; 62, the first sliding plate; 63, the spring; 64, the support rod; 65, the second sliding plate; 66, the sliding groove; 67, the limiting ring; 68, the through hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0030] Embodiment

[0031] Please refer to Figures 1-6 The utility model provides a technical scheme: a injection mould exhaust mechanism for injection mould, including upper injection mould 1, one side of upper injection mould 1 is equipped with lower injection mould 2, one side of upper injection mould 1 is equipped with feed inlet 3, and the inboard of upper injection mould 1 and lower injection mould 2 is equipped with the forming cavity that communicates with feed inlet 3;The both sides of upper injection mould 1 are equipped with exhaust groove, and the plastic of molten state is injected into the inboard of feed inlet 3, at this time, the plastic of molten state enters the inboard of forming cavity through feed inlet 3, and the air in the inboard of forming cavity is discharged under the action of exhaust assembly 5 under the exhaust groove;

[0032] One side of upper injection mould 1 is equipped with exhaust assembly 5 for forming cavity exhaust;

[0033] In order to guarantee the quality of product, be equipped with exhaust assembly 5, and exhaust assembly 5 includes air suction pump 54, the air suction pump 54 intake end is connected with the flow guide pipe 51, and the air suction pump 54 outlet end is connected with the exhaust pipe 53, and one side of upper injection mould 1 is connected with the connecting frame 52 by bolt, and the air suction pump 54 starts to work, and the air suction pump 54 intake end extracts the gas in the inboard of forming cavity through the flow guide pipe 51, and the gas is discharged through the exhaust pipe 53, and one side of connecting frame 52 is installed on one side of air suction pump 54, and the air suction pump 54 intake end is connected with the exhaust groove, and exhaust assembly 5 makes the gas pressure in the inboard of forming cavity less than the outside, so that the plastic of molten state can quickly fill the inboard of forming cavity.

[0034] The prompt assembly 6 includes the connecting pipe 61, the connecting pipe 61 is equipped with the sliding groove 66 inside, the second sliding plate 65 is slidably connected in the inboard of sliding groove 66, after the air suction pump 54 constantly sucks the air, at this time, the gas pressure in the inboard of flow guide pipe 51 is less than the outside atmospheric pressure, and the pressure of outside air pressure is greater than the elastic force of spring 63, so that the second sliding plate 65 slides in the inboard of sliding groove 66, the support rod 64 that penetrates the top side of connecting pipe 61 is fixed on the top of second sliding plate 65, the first sliding plate 62 is fixed on the top of support rod 64, the limit ring 67 is fixed on the inner wall of sliding groove 66, the through hole 68 is formed in one side of limit ring 67, the spring 63 is compressed by the second sliding plate 65, so that the second sliding plate 65 approaches one side of limit ring 67, and the second sliding plate 65 drives support rod 64 and first sliding plate 62 to move downwards, at this time, when the worker visually finds that first sliding plate 62 moves downwards and adheres to the top of connecting pipe 61, it can be known that the inboard of flow guide pipe 51 is blocked at this time.

[0035] The spring 63 is connected between the second sliding plate 65 and the limiting ring 67. When the bottom of the first sliding plate 62 is attached to the top of the connecting pipe 61, the flow guide pipe 51 is in the blocked state. When the top of the second sliding plate 65 is attached to the top of the inner wall of the connecting pipe 61, the flow guide pipe 51 is in the exhaust state. One side of the connecting pipe 61 is in communication with the flow guide pipe 51. The shape of the connecting pipe 61 is a cylinder.

[0036] The model of the air suction pump 54 is KMDP. Since the internal structure and operating principle of the air suction pump 54 of this model are prior art, they will not be described here.

[0037] Working principle: Connect the upper injection mold 1 and the lower injection mold 2 to the operating table of the injection molding machine, then the injection molding machine injects molten plastic into the inside of the feed port 3. At this time, the molten plastic enters the inside of the forming cavity through the feed port 3, and the exhaust groove discharges the air inside the forming cavity under the action of the exhaust assembly 5, avoiding the situation that the air pressure inside the forming cavity is greater than the outside air pressure, so that the plastic contains bubbles inside during forming, resulting in poor injection molding parts products.

[0038] At this time, before the molten plastic enters the inside of the forming, the air suction pump 54 starts to work. The air suction pump 54 sucks the gas inside the forming cavity through the flow guide pipe 51, and discharges the gas through the exhaust pipe 53. Before the molten plastic enters the inside of the forming cavity, the air pressure inside the forming cavity is less than the outside, so that the molten plastic can quickly fill the inside of the forming cavity.

[0039] In a high-temperature and high-pressure injection molding environment, the plastic may undergo thermal decomposition or sintering, forming solid residues and solidifying, remaining inside the flow guide pipe 51, causing the flow guide pipe 51 to be blocked. When the air suction pump 54 starts to work, the air suction pump 54 cannot suck the gas inside the exhaust groove through the flow guide pipe 51. After the air suction pump 54 continuously sucks the gas, the air pressure inside the flow guide pipe 51 is less than the outside air pressure. The pressure of the outside air pressure is greater than the elastic force of the spring 63, so that the second sliding plate 65 slides inside the sliding groove 66, and at the same time, the second sliding plate 65 compresses the spring 63, so that the second sliding plate 65 moves towards the limiting ring 67, and at the same time, the second sliding plate 65 drives the support rod 64 and the first sliding plate 62 to move downwards. At this time, the worker can know that the flow guide pipe 51 is blocked when the first sliding plate 62 moves downwards and attaches to the top of the connecting pipe 61.

[0040] In summary, by reducing the air pressure inside the forming cavity before the molten plastic enters the forming cavity through the air suction pump 54, a negative pressure environment is created. The negative pressure environment can accelerate the flow of molten plastic into the forming cavity, so that the entire forming cavity can be filled more quickly. The molten plastic can fill the forming cavity more uniformly and quickly, so that the appearance and internal structure of the product will be more consistent and uniform, which helps to improve the overall quality and consistency of the product.

[0041] When the flow guide pipe 51 is blocked by the residual molten plastic, the exhaust pump 54 cannot effectively extract the gas inside the exhaust groove, causing the gas pressure inside the flow guide pipe 51 to drop, and the first sliding plate 62 to move and adhere to the top of the connecting pipe 61. Workers can quickly identify the blockage of the flow guide pipe 51, so that timely measures can be taken to clean or repair, and the time of production interruption can be shortened by cleaning the blocked flow guide pipe 51 in time, thereby improving the production efficiency.

[0042] Those skilled in the art can understand that the features described in various embodiments and / or claims of the present application can be combined or / and combined, even if such combinations or combinations are not explicitly described in the present application. In particular, the features described in various embodiments and / or claims of the present application can be combined and / or combined without departing from the spirit and teachings of the present application. All these combinations and / or combinations fall within the scope of the present application.

Claims

1. An injection molding venting mechanism for an injection mold comprising an upper injection mold (1), characterized in that: The upper injection mold (1) is provided with a lower injection mold (2) on one side, the upper injection mold (1) is provided with a feeding port (3) on one side, and the upper injection mold (1) and the lower injection mold (2) are provided with a molding cavity in communication with the feeding port (3) on the inner side; Both sides of the upper injection mold (1) are provided with exhaust grooves; One side of the upper injection mold (1) is provided with an exhaust assembly (5) for the exhaust of the molding cavity; One side of the exhaust assembly (5) is provided with a prompt assembly (6); The exhaust assembly (5) includes an air suction pump (54), the air suction pump (54) is communicated with a flow guide pipe (51) at the air inlet end, the air suction pump (54) is communicated with an exhaust pipe (53) at the air outlet end, and the upper injection mold (1) is connected with a connecting frame (52) on one side through bolts.

2. The injection mold venting mechanism for an injection mold according to claim 1, characterized by: One side of the connecting frame (52) is mounted on one side of the air suction pump (54), and the air inlet end of the flow guide pipe (51) is communicated with the exhaust groove.

3. The injection mold venting mechanism of claim 1, wherein: The prompt assembly (6) includes a connecting pipe (61), the connecting pipe (61) is provided with a sliding groove (66) inside, and the sliding groove (66) is connected with a second sliding plate (65) on the inner side.

4. The injection mold venting mechanism of claim 3, wherein: The second sliding plate (65) is fixed on the top of the first sliding plate (62) and the support rod (64) penetrates the top of the connecting pipe (61) on one side.

5. The injection mold venting mechanism of claim 4, wherein: The sliding groove (66) is fixed with a limiting ring (67) on the inner wall, and a through hole (68) is formed in one side of the limiting ring (67).

6. The injection mold venting mechanism of claim 5, wherein: The second sliding plate (65) and the limiting ring (67) are connected by a spring (63), when the first sliding plate (62) is attached to the top of the connecting pipe (61), the flow guide pipe (51) is in a blocked state, when the top of the second sliding plate (65) is attached to the inner wall of the connecting pipe (61), the flow guide pipe (51) is in an exhaust state.

7. The injection mold venting mechanism for an injection mold according to claim 6, wherein: One side of the connecting pipe (61) is in communication with the flow guide pipe (51), and the shape of the connecting pipe (61) is a cylinder.

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