Thin-wall injection molding mold

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to a thin-wall injection molding mold which comprises a workbench, and a positioning mechanism and a quick injection molding mechanism are respectively arranged above the workbench; the positioning mechanism is positioned on the outer side of the rapid injection molding mechanism; the positioning mechanism comprises a guide rod; the guide rod is used for guiding the movement of the mold during injection molding; the rapid injection molding mechanism comprises an injection molding opening, and the injection molding opening achieves the action of injecting materials into the mold for injection molding. According to the thin-wall injection molding mold, the positioning mechanism and the rapid injection molding mechanism are arranged, the positioning mechanism guides movement of the mold during injection molding through a guide rod, the rapid injection molding mechanism rapidly injects materials into the mold through a plurality of injection molding openings for injection molding, and the rapid injection molding mechanism discharges gas generated after mold closing in an injection molding cavity; the technical problems that air trapping is caused by rapid mold filling during injection molding of an existing thin-wall mold, and bad products appear during injection molding of the thin-wall mold are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field especially relates to a thin wall injection molding mold. BACKGROUND

[0002] Injection mold is a tool for producing plastic products, and is also a tool for giving plastic products complete structure and accurate size, injection mold is composed of two parts of movable mold and fixed mold, movable mold is installed on the moving template of injection molding machine, fixed mold is installed on the fixed template of injection molding machine, movable mold and fixed mold are closed to form a pouring system and a cavity during injection molding, and movable mold and fixed mold are separated to take out plastic products when the mold is opened.

[0003] In actual use, there is certainly some gas in the mold after the mold is closed, the gas in the cavity can be discharged from the exhaust groove or exhaust hole when filling, when injecting the thin wall mold, in order to prevent uneven cooling, it needs to be filled quickly, the melt will block the exhaust groove and exhaust hole, the gas will be wrapped in the cavity, thereby causing gas trapping, resulting in the phenomenon of lack of glue, bubbles and other phenomena of plastic parts after molding, affecting the quality of plastic parts; at the same time, the pressure in the cavity also rises rapidly due to the compression of gas, high pressure can cause the deformation of the mold, so that overflow is formed in the local part of the mold, and even the mold is damaged, the service life of the mold is shortened. In addition, there are also problems of insufficient filling, compression gas burn plastic parts, high internal stress, surface streamline, line, focal spot and other problems, thereby inconvenient to use. UTILITY MODEL CONTENTS

[0004] Based on the technical problem of gas trapping caused by rapid filling of the existing injection thin wall mold, the utility model provides a thin wall injection molding mold.

[0005] The utility model discloses a thin wall injection molding mold, which comprises a workbench, and a positioning mechanism and a rapid injection mechanism are arranged above the workbench.

[0006] The positioning mechanism is located outside the rapid injection mechanism.

[0007] The positioning mechanism comprises a guide rod, which realizes the guiding action of the mold movement during injection.

[0008] The rapid injection mechanism comprises an injection port, which realizes the action of injecting material into the mold for injection.

[0009] Preferably, the positioning mechanism further comprises a mounting bottom plate, the lower surface of the workbench is fixedly connected with support columns, a plurality of support columns are symmetrically distributed around the axis of the workbench, the upper surface of the workbench is fixedly connected with the lower surface of the mounting bottom plate, the upper surface of the mounting bottom plate is fixedly connected with the lower end of the guide rod, and the upper end of the guide rod is fixedly connected with a mounting top plate.

[0010] Preferably, the outer side of the guide rod is provided with buffer springs, a plurality of guide rods are symmetrically distributed around the length direction axis of the mounting bottom plate, the surfaces of the guide rods are respectively slidably connected with a lower mold plate and an upper mold plate, the lower surface of the mounting top plate is fixedly connected with positioning cylinders, the output ends of the positioning cylinders are fixedly connected with the upper surface of the upper mold plate, and two positioning cylinders are symmetrically distributed around the length direction axis of the mounting top plate.

[0011] Preferably, the lower surface of the lower mold plate is elastically connected with the upper surface of the mounting bottom plate through a plurality of buffer springs, the upper mold plate is located above the lower mold plate, the upper surface of the lower mold plate is provided with positioning holes, two positioning holes are symmetrically distributed around the width direction axis of the lower mold plate, the lower surface of the upper mold plate is fixedly connected with positioning columns, and the positioning columns are used in cooperation with the positioning holes.

[0012] Preferably, the rapid injection molding mechanism further comprises sealing rubber strips, the upper surface of the lower mold plate is provided with sealing grooves, the inner wall of the sealing groove is fixedly connected with the surface of the sealing rubber strip, a plurality of sealing grooves are coaxially and equidistantly arranged around the height direction axis of the lower mold plate, the top of the upper mold plate is fixedly communicated with the inner wall of the injection port, and a plurality of injection ports are circumferentially arranged around the height direction axis of the upper mold plate.

[0013] Preferably, the lower surface of the lower mold plate is fixedly connected with a vacuum pump, the upper end of the vacuum pump is fixedly communicated with an exhaust pipe, the exhaust pipe is located in the lower mold plate, the upper end of the exhaust pipe is fixedly communicated with the upper surface of the lower mold plate, and the surface of the exhaust pipe is fixedly connected with a solenoid valve.

[0014] The beneficial effects in the utility model are as follows:

[0015] By arranging the positioning mechanism and the rapid injection molding mechanism, the positioning mechanism moves to guide the injection molding of the mold through the guide rod, the rapid injection molding mechanism rapidly injects materials into the mold through a plurality of injection ports for injection molding, and the rapid injection molding mechanism discharges the gas in the injection molding cavity after the mold is closed, thereby solving the technical problems of gas trapping caused by rapid mold filling during the injection molding of the existing thin-wall mold and the appearance of defective products during the injection molding of the thin-wall mold. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1A schematic diagram of a thin-wall injection molding mold is provided in the utility model.

[0017] Figure 2 A positioning hole structure perspective view of a thin-wall injection molding mold is provided in the utility model.

[0018] Figure 3 An upper mold plate structure perspective view of a thin-wall injection molding mold is provided in the utility model.

[0019] Figure 4 A lower mold plate structure perspective view of a thin-wall injection molding mold is provided in the utility model.

[0020] In the figure: 1, workbench; 2, guide rod; 3, injection port; 201, mounting bottom plate; 202, support column; 203, mounting top plate; 204, buffer spring; 205, lower mold plate; 206, upper mold plate; 207, positioning cylinder; 208, positioning hole; 209, positioning column; 301, sealing rubber strip; 302, sealing groove; 303, vacuum pump; 304, exhaust pipe; 305, electromagnetic valve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to 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.

[0022] Reference Figures 1-4 A thin-wall injection molding mold, comprising a workbench 1, and a positioning mechanism and a rapid injection mechanism are arranged above the workbench 1.

[0023] The positioning mechanism is located outside the rapid injection mechanism.

[0024] In order to avoid deviation when the mold is closed, resulting in product defects, the positioning mechanism is arranged, such as Figures 1-3 The positioning mechanism comprises a guide rod 2, which realizes the guiding action of the mold movement during injection.

[0025] The positioning mechanism further comprises a mounting bottom plate 201, a plurality of support columns 202 are symmetrically distributed around the axis of the workbench 1, the upper surface of the workbench 1 and the lower surface of the mounting bottom plate 201 are fixedly connected, the upper surface of the mounting bottom plate 201 and the lower end of the guide rod 2 are fixedly connected, and the upper end of the guide rod 2 is fixedly connected with the mounting top plate 203.

[0026] Further, the plurality of support columns 202 stably support the positioning mechanism and the rapid injection mechanism above the workbench 1.

[0027] The outer side of the guide rod 2 is provided with a buffer spring 204, a plurality of guide rods 2 are symmetrically distributed around the length direction axis of the mounting bottom plate 201, the surface of the guide rod 2 is respectively slidably connected with the lower die plate 205 and the upper die plate 206, the lower surface of the mounting top plate 203 is fixedly connected with the positioning cylinder 207, the output end of the positioning cylinder 207 is fixedly connected with the upper surface of the upper die plate 206, and the two positioning cylinders 207 are symmetrically distributed around the length direction axis of the mounting top plate 203.

[0028] Further, the positioning cylinder 207 drives the upper die plate 206 to move downwards along the surface of the guide rod 2 and close to the lower die plate 205, so as to form a closed injection cavity.

[0029] The lower surface of the lower die plate 205 is elastically connected with the upper surface of the mounting bottom plate 201 through a plurality of buffer springs 204, the upper die plate 206 is located above the lower die plate 205, the upper surface of the lower die plate 205 is provided with a positioning hole 208, the two positioning holes 208 are symmetrically distributed around the width direction axis of the lower die plate 205, and the lower surface of the upper die plate 206 is fixedly connected with a positioning column 209.

[0030] Further, the positioning column 209 below the upper die plate 206 cooperates with the positioning hole 208 on the surface of the lower die plate 205, so as to avoid deviation of the cooperation between the upper die plate 206 and the lower die plate 205, thereby preventing product deformation.

[0031] In order to avoid defects such as lack of glue caused by gas accumulation in the cavity product during rapid injection molding of thin-walled products, a rapid injection molding mechanism is arranged, such as Figure 1 and Figures 3-4 The rapid injection molding mechanism comprises an injection port 3, which realizes the action of injecting material into the mold for injection molding.

[0032] The rapid injection molding mechanism further comprises a sealing rubber strip 301, the upper surface of the lower die plate 205 is provided with a sealing groove 302, the inner wall of the sealing groove 302 is fixedly connected with the surface of the sealing rubber strip 301, a plurality of sealing grooves 302 are coaxially and equidistantly arranged around the height direction axis of the lower die plate 205, and the top of the upper die plate 206 is fixedly communicated with the inner wall of the injection port 3.

[0033] Further, the lower surface of the upper die plate 206 is connected with the upper surface of the lower die plate 205 through the sealing rubber strip 301, and a closed injection space is formed between the upper die plate 206 and the lower die plate 205.

[0034] The lower surface of the lower mold plate 205 is fixedly connected with a vacuum pump 303, the upper end of the vacuum pump 303 is fixedly communicated with an exhaust pipe 304, the exhaust pipe 304 is located in the inside of the lower mold plate 205, the upper end of the exhaust pipe 304 is fixedly communicated with the upper surface of the lower mold plate 205, and the surface of the exhaust pipe 304 is fixedly connected with a solenoid valve 305.

[0035] Further, after the upper mold plate 206 and the lower mold plate 205 form a sealed space, the air in the sealed space is exhausted by the vacuum pump 303, so that the rapid filling of injection molding is facilitated.

[0036] By setting the positioning mechanism and the rapid injection mechanism, the positioning mechanism moves to guide the injection molding of the mold through the guide rod 2, the positioning cylinder 207 arranged on the lower surface of the top plate 203 drives the upper mold plate 206 to move downward along the surface of the guide rod 2, the multiple buffer springs 204 arranged below the lower mold plate 205 make the lower mold plate 205 and the upper mold plate 206 be tightly connected through the sealing rubber strip 301, the rapid injection mechanism rapidly injects the material into the inside of the mold through multiple injection ports 3 to perform injection molding, the vacuum pump 303 arranged below the lower surface exhausts the gas in the injection cavity after the upper mold plate 206 and the lower mold plate 205 form a sealed space, so that the technical problems of existing injection molding thin-wall mold, such as air trapping caused by rapid filling and defective products caused by injection molding of thin-wall mold, are solved.

[0037] Working principle:

[0038] Before use, the lower part of the workbench 1 supports the positioning mechanism and the rapid injection mechanism above the workbench 1 through a plurality of supporting columns 202, the surface of the workbench 1 is provided with a mounting bottom plate 201, the upper part of the mounting bottom plate 201 is provided with a mounting top plate 203, the upper surface of the mounting bottom plate 201 is fixedly connected with the lower surface of the mounting top plate 203 through a plurality of guide rods 2, the surface of each guide rod 2 is slidably connected with an upper mold plate 206 and a lower mold plate 205, the outer side of each guide rod 2 is provided with a buffer spring 204, the lower surface of the lower mold plate 205 is elastically connected with the upper surface of the lower mounting plate through a plurality of buffer springs 204, the lower surface of the upper mounting plate is provided with a positioning air cylinder 207, the positioning air cylinder 207 drives the upper mold plate 206 to slide along the surface of the guide rod 2, the upper mold plate 206 drives the lower mold plate 205 to slide downwards along the surface of the guide rod 2, the lower surface of the lower mold plate 205 is elastically connected with the upper surface of the mounting bottom plate 201 through a plurality of buffer springs 204, a plurality of sealing grooves 302 are formed in the surface of the lower mold plate 205, sealing rubber strips 301 are arranged in the sealing grooves 302, the upper surface of the lower mold plate 205 is connected with the lower surface of the upper mold plate 206 through a plurality of sealing rubber strips 301, after the closed space between the upper mold plate 206 and the lower mold plate 205 is formed, an electromagnetic valve 305 on the surface of an exhaust pipe 304 is opened, a vacuum pump 303 arranged below the lower mold plate 205 is opened, air in the cavity between the upper mold plate 206 and the lower mold plate 205 is exhausted through the exhaust pipe 304, the electromagnetic valve 305 on the surface of the exhaust pipe 304 is closed, and the cavity between the upper mold plate 206 and the lower mold plate 205 is injected with plastic through a plurality of injection ports 3 arranged above the upper mold plate 206, so that rapid injection and filling are facilitated.

[0039] The above merely describes a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacements or changes within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. Thin-walled injection-molding tool comprising a work table (1), characterized in that: The upper part of the workbench (1) is respectively provided with a positioning mechanism and a rapid injection mechanism; The positioning mechanism is located outside the rapid injection mechanism; The positioning mechanism comprises a guide rod (2), which realizes the action of guiding the movement of the mold during injection; The rapid injection mechanism comprises an injection port (3), which realizes the action of injecting material into the mold for injection.

2. A thin-walled injection moulding tool according to claim 1, characterised in that: The positioning mechanism further comprises a mounting bottom plate (201), the lower surface of the workbench (1) is fixedly connected with a support column (202), a plurality of support columns (202) are symmetrically distributed around the axis of the workbench (1), the upper surface of the workbench (1) is fixedly connected with the lower surface of the mounting bottom plate (201), the upper surface of the mounting bottom plate (201) is fixedly connected with the lower end of the guide rod (2), and the upper end of the guide rod (2) is fixedly connected with a mounting top plate (203).

3. A thin-walled injection moulding tool according to claim 2, characterised in that: The outer side of the guide rod (2) is provided with a buffer spring (204), a plurality of guide rods (2) are symmetrically distributed around the length direction axis of the mounting bottom plate (201), the surface of the guide rod (2) is respectively slidably connected with a lower mold plate (205) and an upper mold plate (206), the lower surface of the mounting top plate (203) is fixedly connected with a positioning cylinder (207), the output end of the positioning cylinder (207) is fixedly connected with the upper surface of the upper mold plate (206), and two positioning cylinders (207) are symmetrically distributed around the length direction axis of the mounting top plate (203).

4. A thin-walled injection moulding tool according to claim 3, characterised in that: The lower surface of the lower mold plate (205) is elastically connected with the upper surface of the mounting bottom plate (201) through a plurality of buffer springs (204), the upper mold plate (206) is located above the lower mold plate (205), the upper surface of the lower mold plate (205) is provided with a positioning hole (208), two positioning holes (208) are symmetrically distributed around the width direction axis of the lower mold plate (205), and the lower surface of the upper mold plate (206) is fixedly connected with a positioning column (209).

5. A thin-walled injection moulding tool according to claim 4, characterised in that: The rapid injection mechanism further comprises a sealing rubber strip (301), the upper surface of the lower mold plate (205) is provided with a sealing groove (302), the inner wall of the sealing groove (302) is fixedly connected with the surface of the sealing rubber strip (301), a plurality of sealing grooves (302) are coaxially and equidistantly arranged around the height direction axis of the lower mold plate (205), the top of the upper mold plate (206) is fixedly communicated with the inner wall of the injection port (3), and a plurality of injection ports (3) are circumferentially arranged around the height direction axis of the upper mold plate (206).

6. A thin-walled injection moulding tool according to claim 5, characterised in that: The lower surface of the lower mold plate (205) is fixedly connected with a vacuum pump (303), the upper end of the vacuum pump (303) is fixedly communicated with an exhaust pipe (304), the exhaust pipe (304) is located in the inside of the lower mold plate (205), the upper end of the exhaust pipe (304) is fixedly communicated with the upper surface of the lower mold plate (205), and the surface of the exhaust pipe (304) is fixedly connected with a solenoid valve (305).

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