CN113510900A

CN113510900A - A bucket injection mold for in-mold rapid prototyping

Info

Publication number: CN113510900A
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: 2021-10-19
Anticipated expiration: 2041-05-19
Also published as: CN113510900B

Abstract

An in-mold rapid prototyping bucket injection mold, comprising a front mold, a rear mold, a pouring system, and an ejector mechanism, and the front mold includes a panel, a front template, a front module, a panel, a first insert, a first insert, and a back The mold includes a rear template, a square iron, a rear module, a second insert, and a second insert. After the front mold and the rear mold are closed, a first molding cavity for injection molding of the barrel body and a second molding cavity for injection molding of the handle are formed; the The injection mold realizes the simultaneous injection molding of the barrel body and the handle. After the injection molding is completed, the barrel body and the handle are assembled, and the product can be taken out after demoulding, the mold structure is optimized, and the product production efficiency is improved.

Description

Bucket injection mold for rapid in-mold forming

Technical Field

The invention relates to a bucket injection mold for rapid in-mold molding.

Background

The plastic bucket is generally used in daily life, the existing conventional plastic bucket comprises a bucket body and a handle, the handle is rotatably connected to the bucket edge of the bucket body, the bucket body and the handle are generally produced by injection molding through injection molds, and the handle and the bucket body can be produced in batches only by two sets of injection molds.

Therefore, people begin to research that the injection molding of the water bucket is completed in a set of injection mold, for example, in the invention patent application with the application number of 201910059538.2, an injection mold of the water bucket 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, and the formed bucket body 1 and the handle 2 are pressed and assembled in the mold through a side core-pulling mechanism 100; although the injection mold can realize press mounting of the handle and the barrel body in the demolding process, the side core-pulling mechanism needs to be configured in the mold to complete the assembling process, and how to design the bucket injection mold for direct injection molding in the mold is important for optimizing the structure of the injection mold and further improving the efficiency.

Disclosure of Invention

Aiming at the defects in the problems, the invention provides a bucket injection mold for rapid in-mold molding.

In order to achieve the purpose, the invention provides a bucket injection mold for rapid in-mold molding, which comprises a front mold, wherein the front mold comprises a panel, a front template and a front module which are sequentially connected from right to left, the left side of the front template is provided with an embedded plate, and the front module and the embedded plate form a barrel-shaped accommodating cavity together;

a first notch is formed in the left end face of the front module, a first insert is arranged in the first notch, a first forming groove is formed in the lower portion 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 die comprises a rear template, 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 convex part extending 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, second through holes are formed in the inner side and the outer side of the second insert, a movable second insert is arranged in each second through hole, a forming groove II is formed in each second insert, and each second insert is connected with an ejection mechanism;

when the front mold and the rear mold are closed, the bulge, the first insert and the second insert form a first molding cavity for barrel injection molding 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 handle injection molding;

the assembled barrel body and the handle are obtained through direct injection molding of the first molding cavity and the second molding cavity, and after the mold is demolded, the first insert and the second insert leave the clamping holes of the barrel body, so that the required water barrel is obtained.

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

in the technical scheme, a 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, and the raw material is respectively conveyed into a first forming cavity and a second forming cavity through the second hot sprue and the third hot sprue, so that synchronous injection molding of the two cavities is realized; 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 save the raw materials; meanwhile, as the injection molding is carried out to form a thin-wall part, a high-precision and high-quality product can be easily produced through the hot runner.

Preferably, the first insert block is provided with a first convex mouth, the second insert block is provided with a second convex mouth, and the outer surfaces of the first convex mouth and the second convex mouth are conical surfaces;

in the technical scheme, after the die is closed, the inner wall surfaces of the first convex nozzle and the second convex nozzle are used for forming the clamping joint of the handle, the outer wall surface is used for forming the clamping hole of the barrel body, during the die release, the first convex nozzle and the second convex nozzle are separated from the clamping hole by force, and the design of the conical surface avoids the pulling and deformation of the product caused by the force release.

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 pressure springs are arranged on the T-shaped columns, the second top plate is tightly attached to the first top plate through the acting force of the second pressure 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 labor-consuming 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 includes 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 an upper end of the ejector pin extends into the second molding cavity;

in the technical scheme, after the upper die finishes demoulding, the second insert is ejected out of the second insert by the second ejector rod, the handle is ejected out of the second forming groove by the ejector pin, and the ejection are carried out synchronously.

Preferably, there are two said thimbles, two said thimbles are distributed symmetrically on both sides of said third hot sprue;

in the technical scheme, the two ejector pins act on the middle position of the handle, so that the handle is conveniently and stably ejected out 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 boss, and an ejection disc is mounted at the shaft end of the cylinder shaft;

according to the technical scheme, the ejection cylinder acts finally 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 invention has the beneficial effects that: present cask injection mold, staving, handle injection moulding need the pressure equipment to accomplish assembly between them respectively in the mould, and the injection mold that this scheme provided, after injection moulding, staving, handle are the assembly completion, and the cask that needs is obtained to the drawing of patterns, and the further optimization of mould structure, injection moulding's efficiency further improves.

Drawings

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

FIG. 2 is a front view of a water tub injection mold according to the present invention;

FIG. 3 is a top view of a water tub injection mold according to the present invention;

FIG. 4 is a cross-sectional view taken at the location A-A in FIG. 2;

FIG. 5 is a cross-sectional view taken at location B-B of FIG. 3;

fig. 6 is an exploded view of a water tub injection mold according to the present invention;

fig. 7 is an exploded view of a water tub 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 ejection mechanism;

fig. 12 is an exploded view of the ejection mechanism;

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

In the figure: 10. a front mold; 101. a panel; 102. a front template; 103. a front module; 104. a panel; 11. a first insert; 111. a first forming groove; 12. a first insert; 121. forming a groove I; 122. a first boss; 13. a first compression spring; 20. a rear mold; 201. a rear template; 202. square iron; 2021. a track groove; 203. a rear module; 2031. a boss portion; 21. a second insert; 211. a second forming groove; 22. a second insert; 221. a forming groove II; 222. a second convex nozzle; 30. a first hot sprue; 31. a hot runner plate; 32. a second hot sprue; 33. a third hot sprue; 40. an ejection mechanism; 41. a first top plate; 42. a second top plate; 43. a second compression spring; 44. a T-shaped column; 45. ejecting a lever; 46. a first ejector rod; 47. a second ejector rod; 48. a thimble; 49. ejecting out the cylinder; 50. ejecting the disc; 1. a barrel body; 1a, a clamping hole; 2. a handle; 2b, a clamping joint.

Detailed Description

As shown in fig. 1 to 12, the bucket injection mold for rapid in-mold molding according to the embodiment of the present invention includes a front mold 10 and a rear mold 20 which are matched with each other, where the front mold 10 includes a front plate 101, a front mold plate 102, and a front mold block 103 which are connected in sequence from right to left, a panel 104 is disposed on the left side of the front mold plate 102, and the front mold block 103 and the panel 104 form a barrel-shaped accommodating cavity together; a first notch is formed in the left end face of the front module 103, a first insert 11 is arranged in the first notch, a first forming groove 111 is formed in the lower portion of the left side face of the first insert 11, a first through hole is formed in the inner side and the outer side of the first insert 11, a movable first insert 12 is arranged in the first through hole, the first insert 12 is connected with the front module 103 through a first compression spring 13, and a forming groove I121 is formed in the first insert 12; the rear mold 20 comprises a rear mold plate 201, square iron 202 and a rear mold block 203 which are connected in sequence from left to right, and the middle part of the rear mold block 203 is provided with a bulge 2031 extending into the accommodating cavity; a second notch is formed in the right end face of the rear module 203, a second insert 21 is arranged in the second notch, a second forming groove 211 is formed in the lower portion of the right side face of the second insert 21, second through holes are formed in the inner side and the outer side of the second insert 21, a movable second insert 22 is arranged in each second through hole, a forming groove II221 is formed in each second insert 22, and each second insert 22 is connected with the ejection mechanism 40; when the front mold 10 and the rear mold 20 are closed, the bulge 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 I121 and the molding groove II221 jointly form a second molding cavity for injection molding of the handle 2; the water bucket injection mold further comprises an injection system, the injection system comprises a hot runner plate 31, a first hot runner 30, a second hot runner 32 and a third hot runner 33, the first hot runner 30 is connected with a nozzle of the injection molding machine, the hot runner plate 31 is positioned in the front mold plate 102, the first hot runner 30 is communicated with the second hot runner 32 and the third hot runner 33 through the hot runner plate 31, the end face of the second hot runner 32 is connected with the first molding cavity, and the third hot runner 33 is connected with the second molding cavity; the molten raw material 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, and the raw material is conveyed into a first molding cavity and a 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; 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 save the raw materials; meanwhile, as the injection molding is a thin-walled part, a high-precision and high-quality product can be easily produced through a hot runner; the first insert 12 is provided with a first convex mouth 122, the second insert 22 is provided with a second convex mouth 222, the outer surfaces of the first convex mouth 122 and the second convex mouth 222 are conical surfaces, after die assembly is carried out, the inner wall surfaces of the first convex mouth and the second convex mouth are used for forming a clamping joint 2b of a handle, the outer wall surface is used for forming a clamping hole 1a of a barrel body, during demoulding, the first convex mouth and the second convex mouth are separated from the clamping hole by force, and the design of the conical surfaces avoids pulling and deformation of a product caused by the force 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, second pressure springs 43 are arranged on the T-shaped columns 44, the second top plate 42 is tightly attached to the first top plate 41 through the acting force of the second pressure springs 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-consuming lever, and when the ejection lever is in contact with the track groove, ejection of a product can be accelerated; the ejection mechanism 40 further comprises a first ejector rod 46, a second ejector rod 47 and an ejector pin 48, wherein the first ejector rod 46 fixedly connects the first ejector plate 41 with the second insert 21, the second ejector rod 47 fixedly connects the second ejector plate 42 with the second insert 21, the ejector pin 48 is fixedly connected with the second ejector plate 42, the upper end of the ejector pin 48 extends into the second molding cavity, after the upper die is demolded, the second insert is ejected by the second ejector rod to be separated from the second insert, and the handle is ejected by the ejector pin to be separated from the second molding cavity, which are performed synchronously; two thimbles 48 are arranged, the two thimbles 48 are symmetrically distributed at two sides of the third hot sprue 33, and the two thimbles act on the middle position of the handle so as to be convenient for stably ejecting the handle out of the second forming groove; the second top plate 42 is also fixed with an ejection cylinder 49, a cylinder shaft of the ejection cylinder 49 penetrates through the bulge 2031, an ejection disc 50 is mounted at the shaft end of the cylinder shaft, and the ejection cylinder finally acts to eject the barrel body and the handle simultaneously, so that the step-by-step demolding process is realized.

The assembled barrel body and the handle are obtained by direct injection molding in the first molding cavity and the second molding cavity, and after the mold is demolded, the first insert and the second insert leave the positions of the clamping holes of the barrel body, so that the required water barrel is obtained; present cask injection mold, staving, handle injection moulding need the pressure equipment to accomplish assembly between them respectively in the mould, and the injection mold that this scheme provided, after injection moulding, staving, handle are the assembly completion, and the cask that needs is obtained to the drawing of patterns, and the further optimization of mould structure, injection moulding's efficiency further improves.

In particular use, the invention will be described with reference to the accompanying drawings for the convenience of understanding;

with reference to fig. 4, 5, 6, and 7, after the front mold and the rear mold are closed, the protrusion 2031, the first insert 11, and the second insert 21 form a first molding cavity for injection molding of the barrel 1 in the receiving cavity, the first molding cavity 111, the second molding cavity 211, the molding cavity I121, and the molding cavity II221 together form a second molding cavity for injection molding of the handle 2, the melted raw material enters the first thermal nozzle from the nozzle of the injection molding machine, the first thermal nozzle conveys the raw material from the hot runner plate to the second thermal nozzle and the third thermal nozzle, and the raw material is conveyed into the first molding cavity and the second molding cavity through the second thermal nozzle and the third thermal nozzle, respectively, so as to realize synchronous injection molding of the two molding cavities;

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 bottom of the barrel body is separated from the embedded plate, the outer wall of the barrel body is separated from the first insert, the first insert is abutted against the edge of the barrel body under the action of the elastic force of the first compression spring, when the first compression spring is restored to the original length, the first insert moves along with the first insert of the front die block, the first convex mouth 122 leaves the position of the clamping hole 1a of the barrel body, the first insert is lagged behind the first insert to be released, step-by-step demolding is carried out, the pulling deformation of a product structure is effectively avoided, and the releasing mode of the first convex mouth is forced releasing;

the injection molding machine is used for ejecting, so that the first top plate and the second top plate move simultaneously, the first ejector rod fixedly connected with the first top plate enables the second insert to be separated from a second notch of the rear module for a certain distance, the inner wall of the barrel body is separated from the bulge 2031 of the rear module, then the ejection lever is in contact with the track groove of the square iron and plays a role in accelerating ejection, the second top plate and the first top plate move relatively, the second ejector rod fixedly connected with the second top plate ejects the second insert so that the second insert is separated from the second insert, meanwhile, an ejector pin fixedly connected with the second top plate ejects the handle so that the handle is separated from the second forming groove, finally, the ejection cylinder acts, the ejection disc ejects the barrel body, and the barrel body is separated from the assembled handle together to obtain a finished product.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a quick fashioned cask injection mold in mould which characterized in that: comprises that

The front die (10) comprises a panel (101), a front die plate (102) and a front die block (103) which are sequentially connected from right to left, a panel (104) is arranged on the left side of the front die plate (102), and the front die block (103) and the panel (104) form a barrel-shaped accommodating cavity together;

a first notch is formed in the left end face of the front module (103), a first insert (11) is arranged in the first notch, a first forming groove (111) is formed in the lower portion of the left side face of the first insert (11), a first through hole is formed in the inner side and the outer side of the first insert (11), a movable first insert (12) is arranged in the first through hole, the first insert (12) is connected with the front module (103) through a first compression spring (13), and a forming groove I (121) is formed in the first insert (12);

the rear die (20) comprises a rear die plate (201), square iron (202) and a rear die block (203) which are sequentially connected from left to right, and a bulge part (2031) extending into the accommodating cavity is arranged in the middle of the rear die block (203);

a second notch is formed in the right end face of the rear module (203), a second insert (21) is arranged in the second notch, a second forming groove (211) is formed in the lower portion of the right side face of the second insert (21), second through holes are formed in the inner side and the outer side of the second insert (21), a movable second insert (22) is arranged in each second through hole, a forming groove II (221) is formed in each second insert (22), and each second insert (22) is connected with the ejection mechanism (40);

when the front mold (10) and the rear mold (20) are closed, a first molding cavity for barrel body (1) injection molding is formed in the accommodating cavity by the bulge (2031), the first insert (11) and the second insert (21), and a second molding cavity for handle (2) injection molding is formed by the first molding groove (111), the second molding groove (211), the molding groove I (121) and the molding groove II (221) together.

2. The in-mold rapid prototyping water barrel injection mold as set forth in claim 1, wherein: the water bucket injection mold further comprises an injection system, the injection system comprises a hot runner plate (31), a first hot sprue (30), a second hot sprue (32) and a third hot sprue (33), the first hot sprue (30) is connected with a nozzle of an injection molding machine, the hot runner plate (31) is located 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), 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.

3. The in-mold rapid prototyping water barrel injection mold as set forth in claim 1, wherein: the first insert (12) is provided with a first convex mouth (122), the second insert (22) is provided with a second convex mouth (222), and the outer surfaces of the first convex mouth (122) and the second convex mouth (222) are conical surfaces.

4. The in-mold rapid prototyping water barrel injection mold as set forth in claim 2, wherein: 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), second pressure springs (43) are arranged on the T-shaped columns (44), the second top plate (42) is tightly attached to the first top plate (41) through the acting force of the second pressure springs (43), an ejection lever (45) is arranged 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).

5. The in-mold rapid prototyping water barrel injection mold as set forth in claim 4, wherein: the ejection mechanism (40) further comprises a first ejector rod (46), a second ejector rod (47) and an ejector pin (48), the first ejector rod (46) fixedly connects the first top plate (41) with the second insert (21), the second ejector rod (47) fixedly connects the second top plate (42) with the second insert (21), the ejector pin (48) is fixedly connected with the second top plate (42), and the upper end of the ejector pin (48) extends into the second molding cavity.

6. The in-mold rapid prototyping water barrel injection mold as set forth in claim 5, wherein: the number of the ejector pins (48) is two, and the two ejector pins (48) are symmetrically distributed on two sides of the third hot sprue bush (33).

7. The in-mold rapid prototyping water barrel injection mold as set forth in claim 5 or 6, wherein: an ejection cylinder (49) is further fixed on the second top plate (42), a cylinder shaft of the ejection cylinder (49) penetrates through the boss (2031), and an ejection disc (50) is mounted at the shaft end of the cylinder shaft.