CN214082550U

CN214082550U - Three-shot forming die assembly

Info

Publication number: CN214082550U
Application number: CN202022282887.1U
Authority: CN
Inventors: 郑海涛; 朱继飞; 何瑞坚
Original assignee: Tongda Xiamen Precision Rubber & Plastic Co ltd
Current assignee: Tongda Xiamen Precision Rubber & Plastic Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-08-31
Anticipated expiration: 2030-10-14

Abstract

The utility model relates to a three injection molding mould subassembly, this three injection molding mould subassembly are used for shaping metal plastic part, and this metal plastic part includes metalwork and the plastic of parcel on this metalwork, and wherein this metalwork one end exposes and is equipped with a locating hole, and the plastic thickness of metal plastic part interlude is uneven and discontinuous, and this three injection molding mould subassembly includes: the first mould is used for carrying out injection molding on the metal plastic part so that the silicon rubber covers the middle section of the metal plastic part, and the middle section is uniform in thickness and is basically flush with the plastics at two ends; the second die is used for carrying out secondary injection molding on the metal plastic part so as to enable the silicon rubber to wrap the upper half part of the metal plastic part; and the third mould is used for carrying out three-shot molding on the metal plastic part so as to enable the silicon rubber to coat the lower half part of the metal plastic part.

Description

Three-shot forming die assembly

Technical Field

The utility model relates to a rubber coating shaping field specifically relates to a three injection molding mould subassembly.

Background

Fig. 9 shows a metal plastic part 100, the metal plastic part 100 includes a metal part 101 and a plastic 102 wrapped on the metal part, wherein one end of the metal part is exposed and provided with a positioning hole 1011, and the plastic thickness of the middle section 103 of the metal plastic part is uneven and discontinuous. The outer ring of the metal plastic part needs to be wrapped with silicone rubber to obtain the desired product 200 (requiring uniform upper and lower encapsulation), as shown in fig. 10. Because only one positioning hole of the metal piece is exposed, the metal piece cannot be completely positioned in the die cavity; meanwhile, the silicone rubber raw material is harder, the thickness of the sheet is thicker, and after the sheet is placed into a cavity, a plastic part is lifted, the positioning effect is lost, and the sheet is easy to extrude and deform, so that the uniform and in-place encapsulation of the periphery of a product cannot be ensured.

Disclosure of Invention

The utility model aims at providing a three injection molding mould subassembly to solve above-mentioned problem. Therefore, the utility model discloses a specific technical scheme as follows:

the utility model provides a three injection molding mould subassembly, this three injection molding mould subassembly is used for shaping metal plastic part, and this metal plastic part includes the metalwork and wraps up the plastic on this metalwork, and wherein this metalwork one end exposes and is equipped with a locating hole, and the plastic thickness of metal plastic part interlude is uneven and discontinuous, and this three injection molding mould subassembly includes:

the first mould is used for carrying out injection molding on the metal plastic part so that the silicon rubber covers the middle section of the metal plastic part, and the middle section is uniform in thickness and is basically flush with the plastics at two ends;

the second die is used for carrying out secondary injection molding on the metal plastic part so as to enable the silicon rubber to wrap the upper half part of the metal plastic part;

and a third mold: the injection molding device is used for performing three-shot molding on the metal plastic part so as to coat the lower half part of the metal plastic part with the silicon rubber.

Furthermore, first mould and second mould all include mould and lower mould, are equipped with in the lower mould and inlay needle and die cavity, realize fixing a position the metal plastic part in first mould and second mould through inlaying needle and die cavity respectively with the plastic cooperation at the locating hole of metal plastic part and both ends.

Furthermore, an upper die of the second die takes a product as a lower die of a third die, an insert pin is arranged on the upper die of the third die, and the metal plastic part is positioned in the third die through the matching of the insert pin and the positioning hole and the two-shot molded silicon rubber.

Further, the first mold, the second mold and the third mold are oil pressure forming molds or injection molding molds.

The utility model adopts the above technical scheme, the beneficial effect who has is:

1. the requirements of uniform rubber coating and incapability of positioning of metal plastic part products are met;

2. the plastic part is supported and protected without deformation;

3. the problem of product because of the uneven plastic thickness of self, sunken of silicon rubber shrink production is improved.

Drawings

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

Fig. 1 is a perspective view of a first mold of a three-shot molding mold assembly of the present invention;

fig. 2 is a schematic view of the metal plastic part shown in fig. 9 positioned in a lower mold of the first mold shown in fig. 1;

FIG. 3 is a schematic view of an injection molded metal-plastic part;

fig. 4 is a perspective view of a second mold of the three shot molding mold assembly of the present invention;

FIG. 5 is a schematic view of the metal-plastic part shown in FIG. 3 positioned in a lower mold of the second mold shown in FIG. 4;

FIG. 6 is a schematic view of a product after two-shot molding of a metal plastic part;

fig. 7 is a perspective view of a third mold of the three-shot molding mold assembly of the present invention;

FIG. 8 is a bottom perspective view of the upper die of the third die shown in FIG. 7;

FIG. 9 is a perspective view of a metal-plastic part;

fig. 10 is a schematic view of a product (final product) of the metal plastic part after three-shot molding.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 10, a three-shot molding die assembly for molding the metal plastic part 100 shown in fig. 9 is described. The three-shot forming die assembly can be an oil pressure forming die or an injection molding die. The present embodiment will be described by taking an oil pressure forming mold as an example. The three-shot forming die assembly includes a first die 1, a second die 2 and a third die 3. The first mold 1 is used for performing injection molding on the metal plastic part 100 to coat the middle section 103 of the metal plastic part with silicone rubber, thereby improving the problem of uneven thickness of the original middle section. Specifically, the first mold 1 includes an upper mold 11 and a lower mold 12, an insert pin 121 and a cavity 122 are disposed in the lower mold 12, and the metal plastic part 100 is positioned in the first mold 1 by the insert pin 121 and the cavity 122 respectively cooperating with a positioning hole 1011 of the metal plastic part 100 and plastics 102 at both ends. A product 100' after one-shot molding needs to be demolded and taken out from the first mold 1 and then transferred to the second mold 2 for two-shot molding. The product 100 'is shown in fig. 3, wherein the intermediate section 103' is formed by the first mould 1.

The second mold 2 is used for performing a two-shot molding on a metal plastic part 100' after the one-shot molding, so that the silicon rubber covers the upper half part of the metal plastic part. Specifically, the second mold 2 includes an upper mold (female mold) 21 and a lower mold (male mold) 22, an insert pin (not shown) and a cavity 222 are provided in the lower mold 22, and the metal plastic part 100 'is positioned in the second mold 2 by the insert pin and the cavity 222 respectively cooperating with the positioning hole 1011 of the metal plastic part 100' and the plastics 102 at both ends. The product 100 "after two injection molding does not demold from the upper mold 21, and directly transfers the upper mold 21 and the product 100" together to the third mold 3 as the lower mold 32 (female mold) of the third mold 3, so that on one hand, the demolding time can be saved, the working efficiency is improved, on the other hand, the product cannot be injured in the demolding process, and the yield is improved. It will be appreciated that after the two-shot moulding, the product 100 "may also be released and transferred to the third mould 3.

The third mold 3 is used for performing three-shot molding on the metal plastic part 100 ″ after one-shot molding, so that the lower half part of the metal plastic part is coated with the silicone rubber, and the final product 200 is obtained. Specifically, the third mold 3 includes an upper mold (male mold) 31 on which an insert (not shown) and a cavity 312 are provided on the upper mold 31, and a lower mold, which is the upper mold 21 of the second mold 2 with the product 100 ″. The product 100 "after the two-shot molding is positioned in the third mold 3 by the insert pin and the positioning hole 1011 and the two-shot molded silicone rubber 101" on the product 100 ". The molded final product 200 is removed after being demolded, and the lower mold can be returned to the second mold 2 as the upper mold 21 of the second mold.

In this embodiment, the metal plastic part is coated with silicone rubber, but it should be understood that the present invention can also be applied to solid silicone rubber, liquid silicone rubber, or special rubber.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a three injection molding mould subassembly, its characterized in that, this three injection molding mould subassembly is used for shaping metal plastic spare, and this metal plastic spare includes the metal part and wraps up the plastic on this metal part, and wherein this metal part one end exposes and is equipped with a locating hole, and the plastic thickness of metal plastic spare interlude is uneven and discontinuous, and this three injection molding mould subassembly includes:

2. The mold assembly of claim 1, wherein the first mold and the second mold each comprise an upper mold and a lower mold, the lower mold having an insert pin and a cavity, the insert pin and the cavity being adapted to engage with the positioning hole of the plastic metal piece and the plastic at both ends of the plastic metal piece to position the plastic metal piece in the first mold and the second mold.

3. A three-shot moulding tool assembly as claimed in claim 2 wherein the upper die of the second tool carries the product as the lower die of the third tool, the upper die of the third tool being provided with insert pins for locating the item in the third tool by engagement of the insert pins with the locating holes and the two-shot moulded silicone rubber.

4. A three-shot moulding assembly as claimed in any one of claims 1 to 3 wherein the first, second and third moulds are oil pressure or injection moulding moulds.