CN210082266U

CN210082266U - Manufacturing mold of highlight injection molding part capable of being directly and locally electroplated

Info

Publication number: CN210082266U
Application number: CN201920123714.XU
Authority: CN
Inventors: 成惊雷
Original assignee: Hunan Hao Run Beijing Great Automotive Components Co Ltd
Current assignee: Hunan Hao Run Beijing Great Automotive Components Co Ltd
Priority date: 2019-01-24
Filing date: 2019-01-24
Publication date: 2020-02-18
Anticipated expiration: 2029-01-24

Abstract

The utility model discloses a preparation mould of highlight injection molding that can directly electroplate locally, including cover half and movable mould set up the first die cavity and the core in the first chamber of moulding plastics of formation that correspond respectively in cover half and the movable mould, in addition set up respectively in cover half and the movable mould with the second die cavity and the core in the second chamber of moulding plastics of formation of first die cavity and core rotational symmetry the rotational symmetry center of first, second core of movable mould is equipped with the rotary mechanism that has ejecting function, rotary mechanism is equipped with symmetry and surface and constitutes respectively first, the cantilever of second core part. The utility model discloses can be with two kinds of materials of highlight and electroplating through twice integrative decoration of the preparation of moulding plastics, because the highlight body does not produce electroplating reaction, only electroplate the body and produce electroplating reaction, the part that the decoration was not electroplated need not shield the processing, can directly electroplate according to normal electroplating process, directly obtain the product of local electroplating to keep the highlight effect of other parts (being greater than 70 GS).

Description

Manufacturing mold of highlight injection molding part capable of being directly and locally electroplated

Technical Field

The utility model belongs to injection mold, concretely relates to preparation mould of highlight injection molding that can directly electroplate locally.

Background

In the exterior trimming parts of automobiles, a large number of painted parts are applied and electroplated trimming parts, such as automobile front grilles, automobile signs, automobile body decorative plates, automobile lamp decorative frames and the like, are embedded; currently, the most two methods are used: firstly, a highlight paint spraying part and an electroplated part are respectively manufactured and then assembled into a decoration product, namely, common injection molding and painting are carried out to form the highlight paint spraying part, other common injection molding is carried out to form the electroplated part after electroplating, and finally the electroplated part and the highlight paint spraying part are combined together; and secondly, obtaining a decoration product by adopting shielding electroplating and shielding spraying, namely carrying out local electroplating after shielding by single-color common injection molding, and then carrying out local highlight spraying after shielding. These methods all have the disadvantages of complex process and low efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple process, efficient preparation mould of highlight injection molding that can directly electroplate locally.

Realize the utility model discloses the technical scheme that the purpose was adopted as follows:

the utility model provides a preparation mould of highlight injection molding that can directly electroplate locally, including cover half and movable mould set up the first die cavity and the first core in the first chamber of moulding plastics of formation that correspond respectively in cover half and the movable mould, in addition set up respectively in cover half and the movable mould with the second die cavity and the second core in the second chamber of moulding plastics of formation of first die cavity and first core rotational symmetry the rotational symmetry center of first, second core of movable mould is equipped with the rotary mechanism that has ejecting function, rotary mechanism is equipped with symmetry and surface and constitutes respectively first, the cantilever of second core part.

The fixed die is provided with a first sprue which is communicated with the first cavity and used for injection molding of the first body in the first injection molding cavity, and the first sprue is located in an area where the second body is to be injection molded in the second injection molding cavity.

The first core of the movable mold is provided with a gate core pin and a bulge connected with the gate core pin, the gate core pin is used for forming a second gate which is used for injection molding of a second body positioned on the front face of the first body on the first body, and the bulge is used for forming a flow channel communicated with the second gate on the first body.

And a second sprue communicated with the second core and the flow channel on the first body is arranged on the movable die.

And a conductive through hole needle which is used for penetrating through the second body, the second pouring gate and the runner to form a conductive through hole is arranged in the second cavity of the fixed die.

Advantageous effects

The utility model discloses can be with two kinds of materials of highlight and electroplating through twice integrative decoration of the preparation of moulding plastics, because the highlight body does not produce electroplating reaction, only electroplate the body and produce electroplating reaction, the part that the decoration was not electroplated need not shield the processing, can directly electroplate according to normal electroplating process, directly obtain the product of local electroplating to keep the highlight effect of other parts (being greater than 70 GS).

Because first runner and electrically conductive via hole all establish in electroplating the body region, the second runner is established at electroplating the body quilt face, and the runner is established at highlight body quilt face, can not see first runner at the outward appearance face of highlight body behind the electroplating body of moulding plastics, and electroplating process highlight effect can not corroded, need not polish after the electroplating and repair.

The appearance surface of the electroplating body (comprising one or more electroplating matrixes) can not see the second sprue, glue is injected from the reverse side of the highlight body through the sprue during secondary injection molding, the surface of the highlight body does not need to be treated before electroplating, and the surfaces of the electroplating matrixes do not need to be connected into a whole.

The conductive via hole on the high-light body can be subjected to light leakage sealing treatment after being assembled.

The utility model has the advantages of simple process and high efficiency, and can replace the traditional production mode of electroplated parts and paint highlight parts.

The technical scheme of the utility model is further explained in the following with the attached drawings.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2-7 are schematic diagrams of the steps of the method for manufacturing the high-gloss injection molding part.

Fig. 8 is the utility model discloses well cover half sets up the schematic diagram of sealing the gluey muscle.

Fig. 9 is a schematic structural diagram of the rotating mechanism of the present invention.

Detailed Description

Referring to fig. 1, 2, 4, 5, 7, the utility model provides a mold for manufacturing highlight injection molding parts capable of being directly plated locally, which comprises a fixed mold 2 and a movable mold 1, wherein a first mold cavity 5 and a first mold core 9 which form a first injection molding cavity are respectively arranged in the fixed mold 2 and the movable mold 1, a second mold cavity 4 and a second mold core 13 which form a second injection molding cavity are respectively arranged in the fixed mold 2 and the movable mold 1 and are rotationally symmetric with the first mold cavity 5 and the first mold core 9, a rotating mechanism 11 with an ejection function is arranged at the rotational symmetry center of the first mold core 9 and the second mold core 13 of the movable mold 1, the rotating mechanism 11 is provided with a cantilever 10 which is symmetric and the surface of which respectively forms a part of the first mold core and the second mold core; a first sprue 7 which is communicated with the first cavity 5 and used for injection molding of a first body in the first injection molding cavity is arranged on the fixed die 1, and the first sprue 7 is positioned in an area where a second body b is to be injection molded in the second injection molding cavity; a gate core pin 6 and a bulge 8 connected with the gate core pin 6 are arranged on a first core 9 of the movable mold 1, the gate core pin 6 is used for forming a second gate a2 on the first body a for injection molding of a second body b positioned on the front surface of the first body a, and the bulge 8 is used for forming a flow passage a3 communicated with the second gate a2 on the first body a; the movable die 1 is provided with a third sprue 12 which is communicated with the second core 13 and is communicated with a runner a3 on the first body a; and a conductive through-hole needle 3 for penetrating the second body b, the second gate a2 and the runner a3 to form a conductive through-hole b1 is arranged in the second cavity 4 of the fixed die 2.

As shown in fig. 9, the rotating mechanism 11 includes a base 1105, a rotating shaft 1101 mounted on the base 1105 through a bearing seat and connected to the cantilever 10, a gear 1102 fixed on the rotating shaft 1101, a driving cylinder 1106 mounted on the base 1105 and engaged with the gear 1102 on the rotating shaft 1101 through a rack 1103 for driving the rotating shaft 1101 to rotate, and a lift cylinder 1107 connected to the bottom of the base 1105 for driving the rotating shaft 1101 and the cantilever 10 to move up and down.

The first body is a high-gloss PMMA (Polymethyl Methacrylate) body, and can also be a high-gloss body made of materials such as PC (Polycarbonate), PTFE (polytetrafluoroethylene), PA (Polyamide or nylon), LCP (Liquid crystal polymer), PPS (polyphenylene sulfide), and the like, and the high-gloss body has the commonness of acid resistance, high gloss, no electroplating reaction, suitability for high gloss and free spraying, and the like.

The second body is an ABS electroplating body, and mainly adopts a material containing ABS (electroplating refers to water plating and utilizes the principle of electrolysis, the part to be plated serves as a cathode and needs to be conductive, so that the electroplated plastic needs to be activated first, and the sensitized plastic is conductive, and the ABS is easy to activate and sensitize, so that the water-plated plastic is generally selected from ABS or a material containing ABS). Including ABS (Acrylonitrile-Butadiene-Styrene copolymer, Acrylonitrile Butadiene Styrene), ABS/PC (polycarbonate and Acrylonitrile-Butadiene-Styrene copolymer and blends).

The method for manufacturing the highlight injection molding piece capable of being directly and locally electroplated comprises the following steps:

step 1, as shown in fig. 3, after the movable mold 1 and the fixed mold 2 are closed, performing one-time injection molding on a1 st injection molded part through a first gate 7 arranged on the fixed mold 2 and located in an electroplating body area, injecting a highlight PMMA body a into a first injection molding cavity formed by the first core 9 and the cavity 5, forming a second gate a2 for injecting an electroplating body located on the front side of the highlight PMMA body a and a runner a3 communicated with the second gate a2 on the highlight PMMA body a, wherein the runner a3 is arranged on the back side of the highlight PMMA body, the second gate a2 is arranged at a position corresponding to the back side of the electroplating body, and simultaneously, a gate residue a1 is left on the highlight PMMA body a, and after the mold is opened, as shown in fig. 4 and 5, the highlight PMMA body a is ejected out through a rotating mechanism 11 and a cantilever 10 thereof by 180 degrees to a position of a second core 13;

step 2, as shown in fig. 6, the high-gloss PMMA body a is retracted into the second mold core 13, mold assembly is performed, secondary injection molding is performed through the third gate 12 arranged on the movable mold 1 via the runner a3 and the second gate a2, the ABS electroplated body b of the 1 st injection molding piece is injected on the high-gloss PMMA body a by using the second injection molding cavity formed by the high-gloss PMMA body a in the second mold core 13 and the second cavity 4, a conductive via hole b1 (see fig. 7) penetrating through the second gate a2 and the runner a3 is formed in the injection molding through the conductive via pin 3, and meanwhile, a sealant rib 16 (see fig. 8) with a width of 0.2 mm and a height of 0.1 mm is added on the high-gloss PMMA body a corresponding to the edge of the second cavity 4 of the fixed mold 2, so that the high-gloss surface of the high-gloss PMMA body a is lightly attached to the fixed mold 2 during mold assembly, and the problem of secondary compression bonding of the high gloss surface can be effectively solved, preparing a1 st high-gloss injection molding finished product;

step 3, as shown in fig. 6 and 7, when the electroplating body b is injected, a2 nd high-gloss PMMA body a is injected into the first injection molding cavity, the mold is opened, and a1 st high-gloss injection molding part finished product is taken out;

and 4, repeating the step 1 to the step 3.

If the electroplating body in the injection molding part is composed of a plurality of independent electroplating matrixes, the second gate a2 and the runner a3 are correspondingly arranged according to each independent electroplating matrix.

Based on the consideration of appearance, the front surface of the high-gloss PMMA body a cannot be provided with a sprue, and the resin ABS penetrates through the bottom of the high-gloss PMMA body and forms the electroplating body b on the surface of the high-gloss PMMA body. Highlight PMMA body an will block linking up of ABS conducting layer in electroplating process, leads to surperficial ABS body can not electroplate, for this reason, the utility model discloses conductive via hole b1 has been designed at highlight PMMA body a to adopt the design of line bar shape, can ensure to satisfy under the electrically conductive prerequisite outward appearance influence minimum. After assembly, the conductive via b1 is subjected to light leakage sealing treatment.

Claims

1. The utility model provides a preparation mould of highlight injection molding that can directly electroplate locally, characterized by includes cover half and movable mould set up corresponding first die cavity and the first core that forms first injection molding chamber in cover half and the movable mould respectively, in addition set up respectively in cover half and the movable mould with first die cavity and first core rotational symmetry's second die cavity and the second core that forms the second injection molding chamber rotary symmetry the rotational symmetry center of first, second core of movable mould is equipped with the rotary mechanism that has ejecting function, rotary mechanism is equipped with the symmetry and the surface constitutes respectively the cantilever of first, second core part.

2. The mold for manufacturing high-gloss injection-molded parts capable of being directly and locally electroplated according to claim 1, wherein the fixed mold is provided with a first gate communicated with the first cavity for injection-molding the first body in the first injection-molding cavity, and the first gate is located in a region where the second body is to be injected in the second injection-molding cavity.

3. The mold for manufacturing high-gloss injection-molded parts capable of being directly and locally electroplated according to claim 2, wherein the first core of the movable mold is provided with a gate core pin and a protrusion connected with the gate core pin, the gate core pin is used for forming a second gate on the first body for injection-molding a second body located on the front surface of the first body, and the protrusion is used for forming a runner communicated with the second gate on the first body.

4. The mold for manufacturing high-gloss injection-molded parts capable of being directly and locally electroplated according to claim 3, wherein the movable mold is provided with a second gate communicated with the second core and the flow channel of the first body.

5. The mold for manufacturing high-gloss injection-molded parts capable of being directly and locally electroplated according to claim 4, wherein a conductive through-hole pin for forming a conductive through-hole through the second body, the second gate and the runner is arranged in the second cavity of the fixed mold.