CN221834889U - Device for improving flash-free exhaust effect of injection mold - Google Patents

Abstract

The utility model relates to the technical field of injection molds, and in particular to a device for improving the flash-free exhaust effect of injection molds. It is mainly aimed at the problem that during the exhaust process of the existing injection molds, raw materials are easily allowed to enter the exhaust pipe, causing the exhaust pipe to be blocked, affecting subsequent use, and the raw materials entering the exhaust pipe will cause flash on the workpiece, and secondary processing is required to remove the flash. The following technical solution is proposed: including a lower mold base, a bracket is installed on the top of the lower mold base, and a hydraulic cylinder is installed on the top wall of the bracket. The output end of the hydraulic cylinder is connected to an upper mold base that is convenient for shaping the raw materials. The utility model can clean the exhaust after the injection molding is completed, avoid clogging of the raw materials, and affect the exhaust during the next use, and facilitate the repair of the generated flash, avoiding separate trimming after the shaping is completed.

Description

A device for improving the flash-free exhaust effect of injection molds

Technical Field

The utility model relates to the technical field of injection molds, in particular to a device for improving the flash-free exhaust effect of injection molds.

Background Art

Injection molds are tools used for plastic injection molding, and they play a vital role in the production of plastic products. Many of today's daily necessities are made by injection molds, such as mobile phone cases, household appliance cases, etc. Usually, the raw materials are injected into the mold, and the upper mold base under the downward pressure is used to extrude the raw materials in the lower mold base. During the extrusion process, the excess gas is discharged through the exhaust pipe opened on the lower mold base to complete the injection molding of the product.

However, during the exhaust process of the existing injection mold, it is easy for the raw materials to enter the exhaust duct, causing the exhaust duct to be blocked, affecting subsequent use, and the raw materials entering the exhaust duct will cause flash on the workpiece, and secondary processing is required to remove the flash. In view of this, we propose a device to improve the flash-free exhaust effect of the injection mold.

Utility Model Content

The utility model aims to solve the problems existing in the background technology and proposes a device for improving the flash-free exhaust effect of injection molds.

The technical solution of the utility model: a device for improving the flash-free venting effect of an injection mold, comprising a lower mold base, a bracket is installed on the top of the lower mold base, a hydraulic cylinder is installed on the top wall of the bracket, the output end of the hydraulic cylinder is connected to an upper mold base for molding the raw material, T-bars are symmetrically welded on the top wall of the upper mold base for assisting the upper mold base in lifting and lowering, a support base is installed on one side wall of the lower mold base, an injection and venting component for venting the lower mold base is arranged in the support base, and a pushing component for demolding the completed workpiece is arranged at the bottom of the molding cavity of the lower mold base.

Preferably, an exhaust duct and an exhaust hole are provided on one side wall of the inner molding cavity of the lower mold base, the exhaust hole is connected to the exhaust duct, and a scraper is welded on the top wall of the exhaust duct.

Preferably, sliding holes are symmetrically opened on the top plate of the bracket, and the bottom ends of the two T-shaped rods respectively pass through the sliding holes corresponding to the positions and are then welded to the top of the upper mold base.

Preferably, a through hole is provided in the middle portion of the bracket top plate, and the output end of the hydraulic cylinder passes through the through hole and is connected to the top wall of the upper die base.

Preferably, the injection and exhaust assembly includes a three-way pipe, the inlet end of the three-way pipe is connected to the exhaust hole, the outlet end of the three-way pipe is respectively connected to an injection pump and an electromagnetic three-way valve, and the electromagnetic three-way valve is installed on the top inner wall of the support seat cover.

Preferably, the discharge end of the electromagnetic three-way valve is connected to a pump, and the pump is installed on the inner wall at the bottom of the support seat cover.

Preferably, the pushing assembly includes an electric push rod motor, and the output ends of the two electric push rod motors are connected to piston plates.

Compared with the prior art, the utility model has the following beneficial technical effects:

The utility model starts the injection pump to inject the raw material into the plastic cavity opened in the lower mold base. When the injection molding is completed, the hydraulic cylinder is started to drive the upper mold base to separate from the plastic cavity, and then the electric push rod motor is started to drive the piston plate to push the workpiece up. During the rising process, the part located in the exhaust pipe is trimmed under the cutting action of the scraper to avoid subsequent separate processing. At the same time, under the action of the electromagnetic three-way valve, the exhaust end is opened to facilitate the exhaust of the plastic cavity. When demoulding is completed, the electromagnetic three-way valve is started to close the exhaust end, thereby opening the discharge end, and cooperating with the extraction pump to extract the raw material in the exhaust pipe to avoid affecting the next exhaust and raw material injection.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an isometric perspective view of a device for improving the flash-free exhaust effect of an injection mold;

FIG2 is a schematic diagram of the cross-sectional structure of FIG1 in a front view;

FIG. 3 is an enlarged schematic diagram of the structure at point A in FIG. 2 .

Figure numerals: 1. lower die base; 2. bracket; 3. hydraulic cylinder; 4. upper die base; 5. T-bar; 7. support base; 8. injection and exhaust assembly; 81. three-way pipe; 82. injection pump; 83. electromagnetic three-way valve; 84. extraction pump; 9. pushing assembly; 91. electric push rod motor; 92. piston plate; 10. scraper.

DETAILED DESCRIPTION

The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figures 1-3, the utility model proposes a device for improving the flash-free exhaust effect of an injection mold, comprising a lower mold base 1, a molding cavity provided in the lower mold base 1 is convenient for molding the raw materials injected therein; an exhaust duct is provided on one side wall of the molding cavity, a scraper 10 is arranged in the exhaust duct, and the top of the scraper 10 is welded to the top wall of the exhaust duct, which is used to cut the raw materials located in the exhaust duct to avoid burrs, resulting in the need to trim the finished workpiece later; an exhaust hole is provided on one side of the exhaust duct, the exhaust duct is connected to the exhaust hole, a partition plate is installed in the exhaust hole, the partition plate is located in the middle of the exhaust hole, and the exhaust hole is equally divided into two parts, one part is convenient for injection molding of the molding cavity, and the other part is convenient for exhausting the inside of the molding cavity to prevent gas accumulation in the molding cavity and affect the quality of the finished product.

Furthermore, the bracket 2 is fixedly mounted on the top wall of the lower mold base 1, and the hydraulic cylinder 3 is fixedly mounted in the middle part of the top plate of the bracket 2. The output end of the hydraulic cylinder 3 passes through the through hole opened on the top plate of the bracket 2, and the output end of the hydraulic cylinder 3 is fixedly connected to the top of the upper mold base 4, which is convenient for driving the upper mold base 4 to rise and fall, and is beneficial for cooperating with the molding cavity opened on the lower mold base 1 to realize molding of the material; the bottom ends of the two T-shaped rods 5 pass through two sliding holes symmetrically opened on the top plate of the bracket 2, and the bottom ends thereof are fixedly connected to the top of the upper mold base 4, which is beneficial for guiding the upper mold base 4 in the lifting state, avoiding deviation in the moving trajectory of the upper mold base 4 during the lifting process, affecting the alignment of the upper mold base 4 and the molding cavity, and hindering the subsequent injection molding work; the top diameters of the two T-shaped rods 5 are larger than the corresponding sliding holes, avoiding the upper mold base 4 from detaching from the bracket 2 and affecting the next use.

Furthermore, the support seat 7 is located on one side of the lower die seat 1, and the cover of the support seat 7 is fixedly connected to the side wall of the lower die seat 1; an injection exhaust assembly 8 for exhausting the lower die seat 1 is arranged in the support seat 7, and the injection exhaust assembly 8 includes a three-way pipe 81, which is arranged inside the cover of the support seat 7, and a baffle is arranged in the middle part of the three-way pipe 81, so as to divide the internal space of the three-way pipe 81 into equal parts, and the side wall of the baffle is welded to the side wall of the partition plate, so that the space above the baffle can be used to inject raw materials into the lower die seat 1, and the space below is convenient for exhausting the interior thereof; the injection pump 82 and the extraction pump 84 are symmetrically arranged, The injection pump 82 is fixedly mounted on the top inner wall of the support seat 7 cover, and the extraction pump 84 is fixedly mounted on the bottom inner wall of the support seat 7 cover. The inlet end of the injection pump 82 is connected to the existing material box, and the outlet end of the extraction pump 84 is connected to the existing collection container; the electromagnetic three-way valve 83 is installed at the inlet end of the extraction pump 84, and the inlet end of the electromagnetic three-way valve 83 is connected to one discharge end of the three-way pipe 81, and the outlet end of the injection pump 82 is connected to the inlet end of the three-way pipe 81. When it is necessary to exhaust the interior of the lower mold base 1, the air outlet end of the electromagnetic three-way valve 83 is in an open state and the discharge end is in a closed state.

Furthermore, a pushing assembly 9 is arranged at the bottom of the molding cavity of the lower mold base 1 for demolding the completed workpiece. The pushing assembly 9 includes an electric push rod motor 91. Positioning grooves are symmetrically provided on the bottom wall of the molding cavity of the lower mold base 1. Two electric push rod motors 91 are respectively installed in the two positioning grooves. The piston plate 92 is located at the top opening of the positioning groove to seal the top of the positioning groove to prevent the raw material from entering during the injection molding process. The output ends of the two electric push rod motors 91 are fixedly connected to the bottom wall of the piston plate 92. The piston plate 92 is pushed up by the electric push rod motor 91 to facilitate the delivery of the injection molded workpiece from the lower mold base 1, avoiding the problem of difficulty in demolding and difficult removal. Several preferred embodiments, based on the technical scheme of the utility model and the relevant inspiration of the above-mentioned embodiments, technical personnel in this field can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims (7)

1. A device for improving the flash-free exhaust effect of an injection mold, comprising a lower mold base (1), characterized in that: a bracket (2) is installed on the top of the lower mold base (1), a hydraulic cylinder (3) is installed on the top wall of the bracket (2), the output end of the hydraulic cylinder (3) is connected to an upper mold base (4) for molding raw materials, a T-shaped rod (5) is symmetrically welded on the top wall of the upper mold base (4) for assisting the upper mold base (4) to rise and fall, a support base (7) is installed on one side wall of the lower mold base (1), an injection exhaust assembly (8) for venting the lower mold base (1) is arranged in the support base (7), and a pushing assembly (9) for demoulding the finished workpiece is arranged at the bottom of the molding cavity of the lower mold base (1). 2. A device for improving the flash-free exhaust effect of an injection mold according to claim 1, characterized in that an exhaust duct and an exhaust hole are opened on one side wall of the inner plastic cavity of the lower mold base (1), the exhaust hole is connected to the exhaust duct, and a scraper (10) is welded on the top wall of the exhaust duct. 3. A device for improving the flash-free venting effect of an injection mold according to claim 1, characterized in that sliding holes are symmetrically opened on the top plate of the bracket (2), and the bottom ends of the two T-shaped rods (5) respectively pass through the corresponding sliding holes and are welded to the top of the upper mold base (4). 4. A device for improving the flash-free venting effect of an injection mold according to claim 1, characterized in that a through hole is opened in the middle of the top plate of the bracket (2), and the output end of the hydraulic cylinder (3) passes through the through hole and is connected to the top wall of the upper mold base (4). 5. A device for improving the flash-free exhaust effect of an injection mold according to claim 1, characterized in that the injection exhaust component (8) includes a three-way pipe (81), the inlet end of the three-way pipe (81) is connected to the exhaust hole, and the outlet end of the three-way pipe (81) is respectively connected to an injection pump (82) and an electromagnetic three-way valve (83), and the electromagnetic three-way valve (83) is installed on the inner wall of the top of the support seat (7) cover. 6. A device for improving the flash-free venting effect of injection molds according to claim 5, characterized in that the discharge end of the electromagnetic three-way valve (83) is connected to a suction pump (84), and the suction pump (84) is installed on the bottom inner wall of the support seat (7) cover. 7. A device for improving the flash-free venting effect of an injection mold according to claim 1, characterized in that the pushing component (9) includes an electric push rod motor (91), and the output ends of the two electric push rod motors (91) are connected to a piston plate (92).