Front mold assembly and injection mold

Abstract

The utility model discloses a front mold assembly and an injection mold, and belongs to the field of injection molds, the upper side of a front mold plate is provided with a fixed mold seat plate, the fixed mold seat plate is fixedly connected with an injection molding machine, the lower side of the front mold plate is movably provided with a plurality of groups of guide columns, the lower ends of the plurality of groups of guide columns are movably sleeved with guide sleeves, and the lower ends of the plurality of groups of guide sleeves are fixedly provided with fixed plates; positioning blocks are fixedly mounted on the upper sides of the multiple sets of guide sleeves, an injection molding cavity is formed in the lower side of the front mold plate, and air inlet assemblies used for ventilation in the water nozzle connectors are arranged in the multiple sets of guide sleeves; through the cooperative use of the devices, the mold has the advantage of easiness in mold opening, and through the reasonable design of the mold structure and the air inlet assembly, the wrapping force of the mold on a product can be reduced in the mold opening process, the mold opening difficulty is reduced, so that the service life of the mold is prolonged, and the production flexibility is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is a front mould assembly and injection mold. BACKGROUND

[0002] The conventional plastic product uses the conventional injection molding method and the ordinary plastic forming, and the forming process has been familiar to people, and the mold has been standardized, for the plastic product, since with the thinning of wall thickness, the cooling speed of plastic melt in the mold cavity is accelerated, and solidification will occur in a very short time, so the forming of thin-walled plastic product must be pressed into the cavity at a high speed with high temperature and good flowability of plastic material in a very short time, which makes the forming process extremely complex and the forming difficulty increases.

[0003] When the plastic product is produced, the product cooling shrinkage will generate a large package tightness on the mold, and a vacuum area may be formed between the product and the front mold, which will lead to an increase in the demand for mold opening force, and at the same time, due to the mechanical structure limitation of the hinge type injection molding machine, the mold opening process will become quite difficult, for this kind of mold which is difficult to open, the traditional solution is to provide a larger mold opening force to directly pull open the mold, but this method will increase the production cost and consume more energy. UTILITY MODEL CONTENTS

[0004] The utility model provides a front mould assembly and injection mold, aims at solving the problem proposed in the background art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: including front mould plate, the upside of front mould plate is provided with fixed mould base plate, the fixed mould base plate is fixedly connected with injection molding machine, the downside of front mould plate movably installs a plurality of guide columns, the lower end of a plurality of guide columns is movably sleeved with guide sleeve, the lower end of a plurality of guide sleeves is fixedly installed with fixed plate, the upside of a plurality of guide sleeves is fixedly installed with locating block, the downside of front mould plate is provided with injection cavity, a plurality of guide sleeves are all provided with air inlet assembly for air in injection cavity.

[0006] As a preferred technical scheme of the application, the air inlet assembly includes a chute, the chute is opened in the guide sleeve, a sealing block is slidably installed in the chute, the upside of the sealing block is rotatably installed with a rotating connecting rod, the upper end of a plurality of rotating connecting rods is rotatably installed with a linkage plate, an air passage is opened in the guide sleeve, and the air passage is connected with the inner wall of the chute.

[0007] As a preferred technical scheme of the application, the air passage in the guide sleeve is L-shaped in cross section, and the air passage is in the chute.

[0008] As a kind of preferred technical scheme of the application, the surface of the sealing block is provided with a sealing sleeve made of rubber, and the sealing sleeve on the surface of the sealing block is attached to the opening connected with the inner wall of the air passage and the chute.

[0009] As a kind of preferred technical scheme of the application, a guide rod is installed in the chute, the sealing block is movably sleeved on the guide rod, a return spring is installed on the guide rod, and the return spring is attached to the side opposite to the sealing block and the injection cavity.

[0010] As a kind of preferred technical scheme of the application, the upper side of the guide sleeve and the upper side of the positioning block are adapted to the lower side of the front mold plate, and the upper side of the linkage plate is flush with the upper side of the guide sleeve.

[0011] As a kind of preferred technical scheme of the application, the chute movably installed on the upper side of the sealing block is obliquely arranged, the lower end of the chute is close to the injection cavity, and the upper end of the chute is close to the positioning block.

[0012] To achieve the above-mentioned purpose, the utility model embodiment provides a kind of injection mold, including front mold plate, rear mold component, ejection mechanism and bib joint, the rear mold component is installed on injection molding machine by pull rod, the upper side of the rear mold component is attached to the lower side of the front mold plate, the upper side of the rear mold component is fixedly connected with the lower side of multiple guide columns by bolt, the ejection mechanism is movably installed in rear mold component, the push rod of the upper side of the ejection mechanism is movably inserted in rear mold component, the push rod of the upper side of the ejection mechanism is attached to the injection cavity of the lower side of the front mold plate, the bib joint is arranged in the front side of front mold plate and rear mold component, the bib joint is connected with the cooling pipeline in the front mold plate and rear mold component.

[0013] Compared with prior art, the utility model has the following beneficial effects: the air inlet assembly design can effectively enter the outside air into the injection cavity after injection molding is completed, avoids the difficulty of opening mold caused by the increase of opening mold force due to the vacuum area formed between the front mold plate and the rear mold component, and the sealing performance of the air inlet assembly is good, which can keep sealing state during injection molding to prevent injection material leakage, ensure the continuity and stability of production, has the advantage of easy mold opening, and by reasonably designing mold structure and air inlet assembly, the clamping force of the mold on the product can be reduced during mold opening, the mold opening difficulty is reduced, and the service life of the mold and the production flexibility are improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view structural schematic diagram of the utility model;

[0015] Figure 2 It is a front view structural split schematic diagram of the utility model;

[0016] Figure 3It is the front view structure schematic diagram of the guide sleeve in the utility model;

[0017] Figure 4 It is the front view structure section schematic diagram of the guide sleeve in the utility model;

[0018] Figure 5 It is Figure 4 The enlarged structure schematic diagram of A.

[0019] In the figure: 1, front template; 2, rear mould assembly; 3, ejection mechanism; 4, fixed die seat plate; 5, guide column; 6, guide sleeve; 7, fixed plate; 8, positioning block; 9, injection cavity; 10, water nozzle joint; 11, sliding groove; 12, sealing block; 13, rotating connecting rod; 14, linkage plate; 15, air passage; 16, guide rod; 17, reset spring. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the utility model.

[0021] As Figures 1 to 4 Indicated, the mould assembly includes front template 1, the upside of front template 1 is provided with fixed die seat plate 4, fixed die seat plate 4 is fixedly connected with injection molding machine, the downside of front template 1 movably installs multiple guide columns 5, the lower end of multiple guide columns 5 is movably sleeved with guide sleeve 6, the lower end of multiple guide sleeves 6 is fixedly installed with fixed plate 7, the upside of multiple guide sleeves 6 is fixedly installed with positioning block 8, the downside of front template 1 is provided with injection cavity 9, multiple guide sleeves 6 are all provided with air inlet assembly for the air exchange in injection cavity 9.

[0022] When using, fixed die seat plate 4 is driven by injection molding machine to work, fixed die seat plate 4 drives front template 1 to move, front template 1 drives multiple guide columns 5 to move, and fixed die seat plate 4 is separated from guide sleeve 6, and then external gas is introduced into injection cavity 9 by air inlet assembly, so that the vacuum area between front template 1 and rear mould assembly 2 is destroyed, the bagging force between front template 1 and rear mould assembly 2 is reduced, and then the mold opening force is reduced, which is convenient for the staff to open the mould and improves the efficiency of opening the mould.

[0023] The air inlet assembly includes sliding groove 11, sliding groove 11 is formed in guide sleeve 6, sealing block 12 is slidably installed in sliding groove 11, rotating connecting rod 13 is rotatably installed on the upside of sealing block 12, linkage plate 14 is rotatably installed on the upper end of multiple rotating connecting rods 13, air passage 15 is formed in guide sleeve 6, and air passage 15 is connected with the inner wall of sliding groove 11.

[0024] When the fixed mold base plate 4 is separated from the guide sleeve 6, the sealing block 12 slides in the sliding groove 11, and the rotating connecting rod 13 and the linkage plate 14 are slid upward, and the sealing block 12 is separated from the opening of the air passage 15 connected with the inner wall of the sliding groove 11. At this time, the external gas enters the injection cavity 9 through the air passage 15, so that the vacuum area between the front mold plate 1 and the rear mold assembly 2 is destroyed.

[0025] The air passage 15 in the guide sleeve 6 is L-shaped in cross section, and the air passage 15 is folded in the sliding groove 11.

[0026] The L-shaped air passage 15 design ensures the normal operation of the air inlet assembly, and the L-shaped air passage 15 can also increase the length of the air inlet path, further improving the sealing performance of the air inlet assembly.

[0027] The surface of the sealing block 12 is provided with a sealing sleeve made of rubber material, and the sealing sleeve on the surface of the sealing block 12 is attached to the opening connected with the inner wall of the air passage 15 and the sliding groove 11.

[0028] The sealing sleeve made of rubber material improves the sealing performance of the air inlet assembly, prevents external gas from entering the injection cavity 9 during injection molding, and ensures the normal operation of the injection molding process.

[0029] The sliding groove 11 is provided with a guide rod 16, and the sealing block 12 is movably sleeved on the guide rod 16. The guide rod 16 is provided with a reset spring 17, and the reset spring 17 is attached to the side of the sealing block 12 opposite to the injection cavity 9.

[0030] When the sealing block 12 slides in the sliding groove 11, the guide rod 16 and the reset spring 17 can provide good guiding effect, so that the sealing block 12 can slide smoothly, ensuring the normal flow of gas and the normal work of the mold during mold opening,

[0031] The upper side of the guide sleeve 6 and the upper side of the positioning block 8 are matched with the lower side of the front mold plate 1, and the upper side of the linkage plate 14 is flush with the upper side of the guide sleeve 6.

[0032] It ensures the stability of the air inlet assembly on the guide sleeve 6, and makes the connection between the upper side of the linkage plate 14 and the front mold plate 1 more closely, further improving the sealing performance of the air inlet assembly.

[0033] The sliding groove 11 rotatably installed on the upper side of the sealing block 12 is inclined, the lower end of the sliding groove 11 is close to the injection cavity 9, and the upper end of the sliding groove 11 is close to the positioning block 8.

[0034] The inclined chute 11 is designed so that when the fixed mold base plate 4 is separated from the guide sleeve 6, the sealing block 12 can more easily slide in the chute 11, and the rotating connecting rod 13 and the linkage plate 14 can more smoothly move upward, thereby ensuring that external gas can smoothly enter the injection cavity 9 through the air passage 15, and further improving the mold opening efficiency.

[0035] The injection mold comprises a front mold plate 1, a rear mold assembly 2, an ejection mechanism 3 and a water nozzle joint 10, the rear mold assembly 2 is installed on an injection molding machine through a pull rod, the upper side of the rear mold assembly 2 is attached to the lower side of the front mold plate 1, the upper side of the rear mold assembly 2 is fixedly connected to the lower side of a plurality of guide columns 5 through bolts, the ejection mechanism 3 is movably installed in the rear mold assembly 2, a push rod on the upper side of the ejection mechanism 3 is movably inserted into the rear mold assembly 2, the push rod on the upper side of the ejection mechanism 3 is attached to the injection cavity 9 on the lower side of the front mold plate 1, and the water nozzle joint 10 is arranged on the front side of the front mold plate 1 and the rear mold assembly 2 and connected with cooling pipelines in the front mold plate 1 and the rear mold assembly 2.

[0036] Working principle: when the injection mold is used, the mold is first installed on an injection molding machine, the fixed mold base plate 4 is fixedly connected to the injection molding machine, the rear mold assembly 2 is stably installed on the injection molding machine through a pull rod, and the upper side of the rear mold assembly 2 is tightly attached to the lower side of the front mold plate 1, then the injection molding machine starts to work, plastic melt is injected into a mold cavity, at this time, the air inlet assembly is in a sealed state to prevent injection material from leaking, after injection is completed, the injection molding machine drives the front mold plate 1 and the fixed mold base plate 4 to move, so that the lower side of the front mold plate 1 is separated from the guide sleeve 6, along with the separation of the lower side of the front mold plate 1 from the guide sleeve 6, the air inlet assembly starts to work, the sealing block 12 is slid in the chute 11 under the action of the guide rod 16 and the return spring 17, and the rotating connecting rod 13 and the linkage plate 14 are moved upward, in the sliding process of the sealing block 12, the sealing sleeve on the surface of the sealing block 12 is gradually separated from the opening connected with the inner wall of the air passage 15 and the chute 11, so as to allow external gas to enter the inside of the injection cavity 9 through the air passage 15, when the external gas enters the injection cavity 9, the vacuum area between the front mold plate 1 and the rear mold assembly 2 is destroyed, the clamping force between the front mold plate 1 and the rear mold assembly 2 is reduced, and then the mold opening force is reduced.

[0037] The above merely describes a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the application concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A front mould assembly comprising a front mould plate (1), characterised in that: The upper side of the front mold plate (1) is provided with a fixed mold base plate (4) which is fixedly connected with an injection molding machine, the lower side of the front mold plate (1) is movably provided with a plurality of guide columns (5), the lower end of each of the plurality of guide columns (5) is movably sleeved with a guide sleeve (6), the lower end of each of the plurality of guide sleeves (6) is fixedly provided with a fixed plate (7), the upper side of each of the plurality of guide sleeves (6) is fixedly provided with a positioning block (8), the lower side of the front mold plate (1) is provided with an injection cavity (9), and each of the plurality of guide sleeves (6) is provided with an air inlet assembly for air exchange in the injection cavity (9).

2. A front die assembly as defined in claim 1, wherein: The air inlet assembly comprises a chute (11) which is formed in the guide sleeve (6), the chute (11) is movably provided with a sealing block (12), the upper side of the sealing block (12) is rotatably provided with a rotating connecting rod (13), the upper end of each of the plurality of rotating connecting rods (13) is rotatably provided with a linkage plate (14), the guide sleeve (6) is provided with an air passage (15), and the air passage (15) is connected with the inner wall of the chute (11).

3. A front die assembly as defined in claim 2 wherein: The air passage (15) in the guide sleeve (6) has an L-shaped cross section, and the air passage (15) is located in the chute (11).

4. A front die assembly as defined in claim 2 wherein: The surface of the sealing block (12) is provided with a sealing sleeve made of rubber, and the sealing sleeve on the surface of the sealing block (12) is attached to the opening connected with the inner wall of the air passage (15) and the chute (11).

5. A front die assembly as defined in claim 2 wherein: Each of the plurality of guide sleeves (6) is movably sleeved with a sealing block (12), and each of the plurality of guide sleeves (6) is movably sleeved with a sealing block (12).

6. A front die assembly as defined in claim 2 wherein: The upper side of the guide sleeve (6) and the upper side of the positioning block (8) are adapted to the lower side of the front mold plate (1), and the upper side of the linkage plate (14) is flush with the upper side of the guide sleeve (6).

7. A front die assembly as defined in claim 2 wherein: The chute (11) rotatably provided on the upper side of the sealing block (12) is obliquely arranged, the lower end of the chute (11) is close to the injection cavity (9), and the upper end of the chute (11) is close to the positioning block (8).

8. A mold characterized in that, The mold comprises: The front mold plate (1) according to any one of claims 1 to 7; The rear mold assembly (2) is movably provided with a plurality of guide columns (5), the lower end of each of the plurality of guide columns (5) is movably sleeved with a guide sleeve (6), the lower end of each of the plurality of guide sleeves (6) is fixedly provided with a fixed plate (7), the upper side of each of the plurality of guide sleeves (6) is fixedly provided with a positioning block (8), the lower side of the front mold plate (1) is provided with an injection cavity (9), and each of the plurality of guide sleeves (6) is provided with an air inlet assembly for air exchange in the injection cavity (9). The air inlet assembly comprises a chute (11) which is formed in the guide sleeve (6), the chute (11) is movably provided with a sealing block (12), the upper side of the sealing block (12) is rotatably provided with a rotating connecting rod (13), the upper end of each of the plurality of rotating connecting rods (13) is rotatably provided with a linkage plate (14), the guide sleeve (6) is provided with an air passage (15), and the air passage (15) is connected with the inner wall of the chute (11). The air passage (15) in the guide sleeve (6) has an L-shaped cross section, and the air passage (15) is located in the chute (11). The surface of the sealing block (12) is provided with a sealing sleeve made of rubber, and the sealing sleeve on the surface of the sealing block (12) is attached to the opening connected with the inner wall of the air passage (15) and the chute (11). Each of the plurality of guide sleeves (6) is movably sleeved with a sealing block (12), and each of the plurality of guide sleeves (6) is movably sleeved with a sealing block (12). The upper side of the guide sleeve (6) and the upper side of the positioning block (8) are adapted to the lower side of the front mold plate (1), and the upper side of the linkage plate (14) is flush with the upper side of the guide sleeve (6). The chute (11) rotatably provided on the upper side of the sealing block (12) is obliquely arranged, the lower end of the chute (11) is close to the injection cavity (9), and the upper end of the chute (11) is close to the positioning block (8). The mold comprises: The front mold plate (1) according to any one of claims 1 to 7; The rear mold assembly (2) is movably provided with a plurality of guide columns (5), the lower end of each of the plurality of guide columns (5) is movably sleeved with a guide sleeve (6), the lower end of each of the plurality of guide sleeves (6) is fixedly provided with a fixed plate (7), the upper side of each of the plurality of guide sleeves (6) is fixedly provided with a positioning block (8), the lower side of the front mold plate (1) is provided with an injection cavity (9), and each of the plurality of guide sleeves (6) is provided with an air inlet assembly for air exchange in the injection cavity (9). The air inlet assembly comprises a chute (11) which is formed in the guide sleeve (6), the chute (11) is movably provided with a sealing block (12), the upper side of the sealing block (12) is rotatably provided with a rotating connecting rod (13), the upper end of each of the plurality of rotating connecting rods (13) is rotatably provided with a linkage plate (14), the guide sleeve (6) is provided with an air passage (15), and the air passage (15) is connected with the inner wall of the chute (11). The air passage (15) in the guide sleeve (6) has an L-shaped cross section, and the air passage (15) is located in the chute (11). The surface of the sealing block (12) is provided with a sealing sleeve made of rubber, and the sealing sleeve on the surface of the sealing block (12) is attached to the opening connected with the inner wall of the air passage (15) and the chute (11). Each of the plurality of guide sleeves (6) is movably sleeved with a sealing block (12), and each of the plurality of guide sleeves (6) is movably sleeved with a sealing block (12). The upper side of the guide sleeve (6) and the upper side of the positioning block (8) are adapted to the lower side of the front mold plate (1), and the upper side of the linkage plate (14) is flush with the upper side of the guide sleeve (6). The chute (11) rotatably provided on the upper side of the sealing block (12) is obliquely arranged, the lower end of the chute (11) is close to the injection cavity (9), and the upper end of the chute (11) is close to the positioning block (8). The mold comprises:

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