CN113510900B

CN113510900B - A bucket injection mold for rapid in-mold molding

Info

Publication number: CN113510900B
Application number: CN202110546417.8A
Authority: CN
Inventors: 胡粲
Original assignee: Taizhou Huangyan Faao Plastic Mould Co ltd
Current assignee: Taizhou Huangyan Faao Plastic Mould Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2025-05-30
Anticipated expiration: 2041-05-19
Also published as: CN113510900A

Abstract

The bucket injection mold comprises a front mold, a rear mold, a pouring system and an ejection mechanism, wherein the front mold comprises a panel, a front template, a front module, a panel, a first insert and a first insert, the rear mold comprises a rear template, square iron, a rear module, a second insert and a second insert, a first molding cavity for injection molding of a bucket body and a second molding cavity for injection molding of a handle are formed after the front mold and the rear mold are assembled, the bucket body and the handle are assembled after injection molding is completed, a product can be taken out after demolding, the mold structure is optimized, and the production efficiency of the product is improved.

Description

Bucket injection mold capable of being molded rapidly in mold

Technical Field

The invention relates to a bucket injection mold capable of being molded rapidly in a mold.

Background

The plastic bucket is generally used in daily life, the conventional plastic bucket comprises a bucket body and a handle, the handle is rotationally connected to the bucket edge of the bucket body, the production of the bucket body and the handle generally adopts injection molding of an injection mold, and the handle and the bucket body can realize batch production by two sets of injection molds.

Therefore, the injection molding of the bucket is finished in a set of injection mold, for example, in the patent application of the application number 201910059538.2, a bucket injection mold is disclosed, in the scheme, a first cavity 50a is used for molding the outer contour of the bucket body 1, a second cavity 50b is used for molding the outer contour of the handle 2, the molded bucket body 1 and the handle 2 are pressed by a side core-pulling mechanism 100 to finish the in-mold assembly, and the injection mold can realize the press mounting of the handle and the bucket body in the demolding process, but the in-mold needs to be provided with the side core-pulling mechanism to finish the assembly process, so that the in-mold direct injection molding bucket injection mold is designed, and the efficiency is further improved, and the meaning is significant for optimizing the structure of the injection mold.

Disclosure of Invention

Aiming at the defects in the problems, the invention provides a bucket injection mold capable of being rapidly molded in a mold. In order to achieve the above purpose, the invention provides a bucket injection mold capable of being rapidly molded in a mold, which comprises a front mold, wherein the front mold comprises a panel, a front mold plate and a front mold block which are sequentially connected from right to left, the left side of the front mold plate is provided with a panel, and the front mold block and the panel form a barrel-shaped accommodating cavity together;

The left end face of the front module is provided with a first notch, a first insert is arranged in the first notch, a first forming groove is formed in the lower part of the left side face of the first insert, a first through hole is formed in the inner side and the outer side of the first insert, a movable first insert is arranged in the first through hole, the first insert is connected with the front module through a first compression spring, and a forming groove I is formed in the first insert;

The rear mould comprises a rear mould plate, square iron and a rear module which are sequentially connected from left to right, and the middle part of the rear module is provided with a protruding part which stretches into the accommodating cavity;

A second notch is formed in the right end face of the rear module, a second insert is arranged in the second notch, a second forming groove is formed in the lower portion of the right side face of the second insert, a second through hole is formed in the inner side and the outer side of the second insert, a movable second insert is arranged in the second through hole, a forming groove II is formed in the second insert, and the second insert is connected with an ejection mechanism;

when the front die and the rear die are clamped, the protruding part, the first insert and the second insert form a first molding cavity for injection molding of the barrel body in the accommodating cavity, and the first molding groove, the second molding groove, the molding groove I and the molding groove II jointly form a second molding cavity for injection molding of the handle;

The first insert is provided with a first convex nozzle, the second insert is provided with a second convex nozzle, and the outer surfaces of the first convex nozzle and the second convex nozzle are conical surfaces;

the first molding cavity and the second molding cavity are directly injection molded to obtain the assembled barrel body and the handle, after the mold is demolded, the first insert and the second insert are separated from the clamping hole of the barrel body, the required water barrel is obtained, the structural design of the injection mold is ingenious, the process of pressing and mounting in the mold is omitted, the production efficiency of product further improves, and after the compound die, first protruding mouth, the protruding mouth internal face of second are used for the joint of shaping handle, and the external wall is used for the draw-in hole of shaping staving, and during the drawing of patterns, first protruding mouth, the protruding mouth of second are the strong draw-out hole of leaving, and the design of conical surface has avoided strong drawing of patterns to lead to the fact the strain, the deformation of product.

Preferably, the bucket injection mold further comprises a pouring system, the pouring system comprises a hot runner plate, a first hot sprue, a second hot sprue and a third hot sprue, the first hot sprue is connected with a nozzle of an injection molding machine, the hot runner plate is positioned in the front mold plate, the first hot sprue is communicated with the second hot sprue and the third hot sprue through the hot runner plate, wherein the end face of the second hot sprue is connected with the first molding cavity, and the third hot sprue is connected with the second molding cavity;

According to the technical scheme, molten raw materials firstly enter a first hot sprue from a nozzle of an injection molding machine, the first hot sprue conveys the raw materials to a second hot sprue and a third hot sprue through a hot runner plate, the raw materials are respectively conveyed into a first molding cavity and a second molding cavity through the second hot sprue and the third hot sprue, synchronous injection molding of the two molding cavities is achieved, secondly, the arrangement of the hot runner can improve the fluidity of the raw materials, eliminate a water gap in the injection molding process and achieve the effect of saving the raw materials, and meanwhile, the injection molded products with high precision and high quality can be easily produced through the hot runner because the injection molded products are thin-wall parts.

Preferably, the ejection mechanism comprises a first top plate and a second top plate which are arranged between the rear template and the rear module, a plurality of T-shaped columns are fixed on the first top plate, second compression springs are arranged on the T-shaped columns, the second top plate is tightly attached to the first top plate by acting force of the second compression springs, an ejection lever is arranged between the first top plate and the second top plate, and a track groove for the ejection lever to move is processed on the square iron;

in the technical scheme, the ejection lever is a laborious lever, and when the ejection lever is in contact with the track groove, ejection of a product can be accelerated.

Preferably, the ejection mechanism further comprises a first ejector rod, a second ejector rod and an ejector pin, the first ejector rod fixedly connects the first top plate with the second insert, the second ejector rod fixedly connects the second top plate with the second insert, the ejector pin is fixedly connected with the second top plate, and the upper end of the ejector pin extends into the second molding cavity;

in the technical scheme, after the upper die is demolded, the second ejector rod ejects the second insert out of the second insert, and the ejector pin ejects the handle out of the second molding groove, so that the second insert and the second ejector rod are synchronously carried out.

Preferably, two ejector pins are arranged, and the two ejector pins are symmetrically distributed on two sides of the third hot sprue;

In the technical scheme, the two ejector pins act on the middle position of the handle, so that the handle can be stably ejected out of the position of the second forming groove.

Preferably, an ejection cylinder is further fixed on the second top plate, a cylinder shaft of the ejection cylinder penetrates through the protruding portion, and an ejection disc is mounted at the shaft end of the cylinder shaft;

in the technical scheme, the ejection cylinder finally acts to eject the barrel body and the handle simultaneously, so that the step-by-step demolding process is realized.

Compared with the prior art, the injection mold has the beneficial effects that the barrel body and the handle are assembled by pressing in the mold through injection molding respectively, the barrel body and the handle are assembled after injection molding, the required barrel is obtained through demolding, the mold structure is further optimized, and the injection molding efficiency is further improved.

Drawings

Fig. 1 is a perspective view of a bucket injection mold according to the present invention;

fig. 2 is a front view of a bucket injection mold according to the present invention;

fig. 3 is a top view of a bucket injection mold according to the present invention;

FIG. 4 is a cross-sectional view taken at the A-A position of FIG. 2;

FIG. 5 is a cross-sectional view of the B-B position of FIG. 3;

Fig. 6 is an exploded view of a bucket injection mold according to the present invention;

Fig. 7 is an exploded view of a bucket injection mold according to the present invention;

FIG. 8 is a schematic view of a first insert;

FIG. 9 is a schematic view of a first insert;

FIG. 10 is a schematic view of a second insert;

FIG. 11 is an exploded view of the ejector mechanism;

FIG. 12 is an exploded view of the ejector mechanism;

fig. 13 is a schematic view of a water tub according to the present invention.

In the figure, 10, front mold, 101, panel, 102, front mold plate, 103, front mold plate, 104, panel, 11, first insert, 111, first forming groove, 12, first insert, 121, forming groove I, 122, first flange, 13, first compression spring, 20, rear mold, 201, rear mold plate, 202, square iron, 2021, track groove, 203, rear mold plate, 2031, boss, 21, second insert, 211, second forming groove, 22, second insert, 221, forming groove II, 222, second flange, 30, first heat flange, 31, hot runner plate, 32, second heat flange, 33, third heat flange, 40, ejection mechanism, 41, first top plate, 42, second top plate, 43, second compression spring, 44, T-shaped post, 45, ejection lever, 46, first ejector pin, 47, second ejector pin, 48, 49, ejection cylinder, 50, ejection disc, 1, barrel, clip 1, clip 2, handle 2, hole 2, and joint.

Detailed Description

As shown in FIGS. 1-12, the bucket injection mold for in-mold rapid molding in the embodiment of the invention comprises a front mold 10 and a rear mold 20 which are matched, wherein the front mold 10 comprises a panel 101, a front template 102, a front mold plate 102, a back mold 20 and a front mold plate 10 which are sequentially connected from right to left, The front module 103, the left side of the front template 102 is provided with a panel 104, the front module 103 and the panel 104 form a barrel-shaped accommodating cavity together, the left end face of the front module 103 is provided with a first notch, a first insert 11 is arranged in the first notch, the lower part of the left side face of the first insert 11 is provided with a first forming groove 111, the first insert 11 is provided with a first through hole on the inner side and the outer side, the first through hole is internally provided with a movable first insert 12, the first insert 12 is connected with the front module 103 through a first compression spring 13, the first insert 12 is provided with a forming groove I121, the rear module 20 comprises a rear template 201, a first forming groove I121, a second forming groove I and a second forming groove I, The square iron 202, the rear module 203, the middle part of the rear module 203 is provided with a protruding part 2031 extending into the accommodating cavity, the right end face of the rear module 203 is provided with a second notch and is internally provided with a second insert 21, the lower part of the right side face of the second insert 21 is provided with a second molding groove 211, the inner side and the outer side of the second insert 21 are provided with second through holes, the second through holes are internally provided with movable second inserts 22, the second inserts 22 are provided with molding grooves II221, the second inserts 22 are connected with the ejection mechanism 40, when the front mold 10 and the rear mold 20 are assembled, the protruding part 2031, the first insert 11 and the second insert 21 form a first molding cavity for injection molding of the barrel 1 in the accommodating cavity, the first molding groove 111, the second molding groove 211, the molding groove I121 and the molding groove II221 form a second molding cavity for the injection molding of the handle 2, wherein the water bucket injection mold also comprises a pouring system, and the pouring system comprises a hot runner plate 31, a first hot sprue 30, The second hot sprue 32 is communicated with the third hot sprue 33, the first hot sprue 30 is connected with the nozzle of the injection molding machine, the hot runner plate 31 is positioned in the front mold plate 102, the first hot sprue 30 is communicated with the second hot sprue 32 and the third hot sprue 33 through the hot runner plate 31, wherein the end face of the second hot sprue 32 is connected with the first molding cavity, and the third hot sprue 33 is connected with the second molding cavity; the molten raw material firstly enters a first hot sprue from a nozzle of an injection molding machine, the first hot sprue conveys the raw material to a second hot sprue and a third hot sprue from a hot runner plate, the raw material is respectively conveyed into a first molding cavity and a second molding cavity through the second hot sprue and the third hot sprue to realize synchronous injection molding of the two molding cavities, secondly, the arrangement of the hot runner can improve the fluidity of the raw material, eliminate a water gap in the injection molding process and achieve the saving effect on the raw material, meanwhile, the injection molding is produced into a thin-wall part, high-precision and high-quality products can be easily produced through the hot runner, the first insert 12 is provided with a first convex nozzle 122, the second insert 22 is provided with a second convex nozzle 222, the outer surfaces of the first convex nozzle 122 and the second convex nozzle 222 are conical surfaces, after mold closing, the first convex nozzle, The second protruding mouth inner wall surface is used for forming the clamping joint 2b of the handle, the outer wall surface is used for forming the clamping hole 1a of the barrel body, the first protruding mouth and the second protruding mouth are separated from the clamping hole in a strong manner during demolding, the conical surface is designed to avoid the pull damage and deformation of products caused by strong separation, the ejection mechanism 40 comprises a first top plate 41 and a second top plate 42 which are arranged between the rear template 201 and the rear module 203, a plurality of T-shaped columns 44 are fixed on the first top plate 41, a second compression spring 43 is arranged on the T-shaped columns 44, the second top plate 42 is tightly attached to the first top plate 41 by the acting force of the second compression spring 43, an ejection lever 45 is arranged between the first top plate 41 and the second top plate 42, a track groove 2021 for the ejection lever 45 to move is processed on the square iron 202, the ejection lever is a labor-saving lever, the ejection of products can be accelerated when the ejection lever is contacted with the track groove, the ejection mechanism 40 further comprises a first ejector rod 46, a second ejector rod 47, The ejector pins 48, the first ejector pin 46 is used for fixedly connecting the first top plate 41 with the second insert 21, the second ejector pin 47 is used for fixedly connecting the second top plate 42 with the second insert 22, the ejector pins 48 are fixedly connected with the second top plate 42, the upper ends of the ejector pins 48 extend into the second molding cavity, after the demolding of the upper die is completed, the second insert is ejected out of the second insert by the second ejector pin, the handles are ejected out of the second molding groove by the ejector pins, the ejector pins 48 and the second molding groove are synchronously performed, the two ejector pins 48 are symmetrically distributed on two sides of the third hot sprue 33, the two ejector pins act on the middle position of the handles, so that the handles can be conveniently and stably ejected out of the second molding groove, the second top plate 42 is also fixedly provided with an ejection cylinder 49, a cylinder shaft of the ejection cylinder 49 penetrates through the boss 2031, an ejection disc 50 is arranged at the shaft end of the cylinder shaft, and the ejection cylinder acts at last, the barrel and the handles are ejected simultaneously, and the step-by step demolding process is realized.

The first molding cavity and the second molding cavity are directly subjected to injection molding to obtain the assembled barrel body and the handle, after the mold is demolded, the first insert and the second insert are separated from the clamping hole of the barrel body, so that the required water barrel is obtained; the assembly of the barrel body and the handle is completed by pressing in the mold by the existing barrel injection mold, after injection molding, the barrel body and the handle are assembled, the required barrel is obtained by demolding, the mold structure is further optimized, and the injection molding efficiency is further improved.

When in specific use, the invention is described with reference to the drawings for convenient understanding;

With reference to fig. 4, 5, 6 and 7, after the front mold and the rear mold are closed, the boss 2031, the first insert 11 and the second insert 21 form a first molding cavity for injection molding of the barrel 1 in the accommodating cavity, the first molding groove 111, the second molding groove 211, the molding groove I121 and the molding groove II221 together form a second molding cavity for injection molding of the handle 2, molten raw materials enter the first hot sprue from the nozzle of the injection molding machine first, the first hot sprue conveys the raw materials into the second hot sprue and the third hot sprue through the hot runner plate, and the raw materials are conveyed into the first molding cavity and the second molding cavity respectively through the second hot sprue and the third hot sprue, so that synchronous injection molding of the two molding cavities is realized;

the demolding process of the injection mold is as follows:

The front die moves relative to the rear die, so that the outer wall of the barrel bottom of the barrel body is separated from the panel, the outer wall of the barrel body is separated from the first insert, the first insert is propped against the edge of the barrel body under the action of the elastic force of the first compression spring, when the first compression spring returns to the original length, the first insert moves along with the first insert of the front die, the first boss 122 leaves the position of the clamping hole 1a of the barrel body, the first insert is delayed from the first insert to be separated, the pull deformation of a product structure is effectively avoided by step-by-step demolding, and the separation mode of the first boss is strong separation;

The injection molding machine is ejected, make first roof, the simultaneous movement of second roof, first ejector pin that links firmly with first roof makes the second mold insert deviate from the second notch of back module a certain distance, the ladle body inner wall of staving and the bellying 2031 of back module take place the separation, afterwards, ejector lever and the orbital slot contact of square iron, ejector lever play the ejecting effect of acceleration, the relative motion takes place for second roof, first roof, the ejector pin that links firmly with second roof makes the second mold insert with the ejecting of second mold insert of second ejector pin that links firmly of second roof, simultaneously, ejector pin that links firmly with second roof makes the position that the handle left the second shaping groove with the handle top, finally, the action of ejecting cylinder, ejecting disc is ejecting the staving, the staving is deviate from together with the handle of assembly and is obtained the finished product.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold for a bucket for in-mold rapid prototyping, characterized in that: it comprises a front mold (10), the front mold (10) comprises a panel (101), a front template (102), and a front module (103) connected in sequence from right to left, a panel (104) is provided on the left side of the front template (102), and the front module (103) and the panel (104) together form a barrel-shaped accommodating cavity;

The left end surface of the front module (103) is provided with a first notch and a first insert (11) is arranged in the first notch, a first molding groove (111) is processed on the lower part of the left side surface of the first insert (11), the first insert (11) is provided with a first through hole on the inner and outer sides, a movable first insert (12) is arranged in the first through hole, the first insert (12) is connected to the front module (103) via a first compression spring (13), and a molding groove I (121) is processed on the first insert (12);

A rear mold (20), the rear mold (20) comprising a rear mold plate (201), a square iron (202), and a rear module (203) connected in sequence from left to right, wherein the middle portion of the rear module (203) has a protruding portion (2031) extending into the accommodating cavity;

A second notch is provided on the right end face of the rear module (203) and a second insert (21) is arranged in the second notch, a second molding groove (211) is processed on the lower right side face of the second insert (21), a second through hole is provided on the inner and outer sides of the second insert (21), a movable second insert (22) is arranged in the second through hole, a molding groove II (221) is processed on the second insert (22), and the second insert (22) is connected to the ejection mechanism (40);

When the front mold (10) and the rear mold (20) are molded together, the protruding portion (2031), the first insert (11), and the second insert (21) form a first molding cavity for injection molding of the barrel body (1) in the accommodating cavity, and the first molding groove (111), the second molding groove (211), the molding groove I (121), and the molding groove II (221) together form a second molding cavity for injection molding of the handle (2);

The first insert (12) has a first protrusion (122), and the second insert (22) has a second protrusion (222). The outer surfaces of the first protrusion (122) and the second protrusion (222) are conical surfaces.

2. According to claim 1, a bucket injection mold for in-mold rapid prototyping is characterized in that: the bucket injection mold also includes a casting system, the casting system includes a hot runner plate (31), a first hot nozzle (30), a second hot nozzle (32) and a third hot nozzle (33), the first hot nozzle (30) is connected to the nozzle of the injection molding machine, the hot runner plate (31) is located in the front template (102), the first hot nozzle (30) is connected to the second hot nozzle (32) and the third hot nozzle (33) through the hot runner plate (31), wherein the end face of the second hot nozzle (32) is connected to the first molding cavity, and the third hot nozzle (33) is connected to the second molding cavity.

3. An in-mold rapid prototyping bucket injection mold according to claim 2, characterized in that: the ejection mechanism (40) includes a first top plate (41) and a second top plate (42) arranged between the rear template (201) and the rear module (203), a plurality of T-shaped columns (44) are fixed on the first top plate (41), and a second compression spring (43) is provided on the T-shaped column (44), and the second top plate (42) is tightly attached to the first top plate (41) through the action of the second compression spring (43), an ejection lever (45) is provided between the first top plate (41) and the second top plate (42), and a track groove (2021) for the ejection lever (45) to move is processed on the square iron (202).

4. An in-mold rapid prototyping bucket injection mold according to claim 3, characterized in that: the ejection mechanism (40) also includes a first ejector rod (46), a second ejector rod (47), and an ejector pin (48), the first ejector rod (46) fixes the first ejector plate (41) and the second insert (21), the second ejector rod (47) fixes the second ejector plate (42) and the second insert (22), the ejector pin (48) is fixedly connected to the second ejector plate (42), and the upper end of the ejector pin (48) extends into the second molding cavity.

5. The bucket injection mold for in-mold rapid prototyping according to claim 4, characterized in that: there are two ejector pins, and the two ejector pins (48) are symmetrically distributed on both sides of the third hot nozzle (33).

6. An in-mold rapid prototyping bucket injection mold according to claim 4 or 5, characterized in that: an ejection cylinder (49) is also fixed on the second top plate (42), the cylinder shaft of the ejection cylinder (49) passes through the protruding portion (2031), and an ejection disc (50) is installed on the axial end of the cylinder shaft.