阅读说明：本技术 一种汽车内饰件的双色电镀加工方法 (Double-color electroplating processing method for automotive interior parts ) 是由 盛夕军 于 2021-08-31 设计创作，主要内容包括：一种汽车内饰件的双色电镀加工方法,该双色电镀加工方法包括以下步骤：S1：双色注塑；S2：双色毛坯件的电镀与解胶；S2.1电镀前处理；S2.2解胶；S2.2化学镀。本发明通过双色注塑模具将ABS&PC零件一次性注塑成型,然后,直接双色电镀,并根据PC与ABS的性质不同,通过解胶药水保证PC面在电镀时不会上镀；本发明在工序上节省了一次注塑工序和一次组装工序,从而简化了生产工序,压缩了生产周期,不仅提高了汽车内饰件的产量和质量,也提高了工作效率,减少了人工成本；同时,受镀零件的PC背面不会再上镀层,节省了原材料成本。(A double-color electroplating processing method of an automotive interior part comprises the following steps: s1: performing double-color injection molding; s2: electroplating and dispergating the bicolor blank piece; s2.1, electroplating pretreatment; s2.2, dispergating; s2.2, chemical plating. According to the invention, ABS & PC parts are subjected to one-time injection molding through a double-color injection mold, then direct double-color electroplating is performed, and according to the different properties of PC and ABS, the PC surface is ensured not to be plated during electroplating through a peptizing agent; the invention saves one-time injection molding process and one-time assembly process in the process, thereby simplifying the production process, compressing the production cycle, improving the yield and the quality of the automotive upholstery, improving the working efficiency and reducing the labor cost; meanwhile, the PC back of the plated part can not be plated any more, so that the raw material cost is saved.)

1. A double-color electroplating processing method of an automotive interior part is characterized by comprising the following steps:

s1: two-color injection molding

During injection molding, firstly, assembling a double-color injection mold, then, automatically injecting a PC part by an injection molding machine according to a flow set by a PLC, and after the PC part is completed, automatically rotating the double-color injection mold in an injection molding machine and then molding and encapsulating an ABS (acrylonitrile butadiene styrene) electroplating part, so that one-time molding is realized and a double-color plastic blank is obtained;

s2: electroplating and dispergating of bicolor blank

S2.1 pretreatment before electroplating

Sequentially carrying out oil removal, hydrophilization, coarsening, neutralization and palladium water activation procedures on the bicolor plastic blank obtained in the step S1 to obtain a bicolor plastic blank after electroplating pretreatment;

s2.2 dispergation

Soaking the electroplated and pretreated double-color plastic blank obtained in the step S2.1 in prepared dispergation liquid medicine, controlling the PC surface of the double-color plastic blank not to be plated through the dispergation liquid medicine, and adopting dispergation liquid medicine with different concentrations according to different materials of the structural surface of the plated part of the ABS;

s2.2 electroless plating

And (3) soaking the work piece after the glue is removed in the step (S2.2) in a container containing a plating solution to obtain a bicolor plastic electroplated part.

2. The double-color electroplating processing method of the automotive interior part according to claim 1, characterized in that: the plating solution in the step S2.2 is any one of a copper plating solution, a nickel plating solution, and a chromium plating solution.

3. The double-color electroplating processing method of the automotive interior part according to claim 1, characterized in that: the dispergation liquid medicine is mainly prepared by mixing the following components:

3-15 g/L of sodium hydroxide, 1-10 g/L of disodium ethylene diamine tetraacetate and 1-10 g/L of sodium carbonate.

4. The double-color electroplating processing method of the automotive interior part according to claim 1, characterized in that: the double-color mold comprises a front mold and a rear mold, and the front mold and the rear mold are in butt joint fit in a separable mode;

the front mold comprises a front mold base plate, three first square irons are vertically arranged on the top surface of the front mold base plate at equal intervals, a first injection upper fixing plate and a second injection upper fixing plate are horizontally arranged between the adjacent first square irons respectively, a first injection runner plate is arranged on the first injection upper fixing plate, a second injection runner plate is arranged on the second injection upper fixing plate, a first injection front mold plate and a second injection front mold plate are erected on the top surfaces of the adjacent first square irons respectively, the first injection heat runner plate is connected with the first injection front mold plate in a sliding mode through a guide pillar, the second injection heat runner plate is connected with the second injection front mold plate in a sliding mode through the guide pillar, the first front mold plate is connected with the second front mold plate through a front mold extruding block, a first front mold core is arranged in the first front mold plate, and a second front mold core is arranged in the second front mold plate;

the rear mould comprises a rear mould base plate, wherein a first lower injection fixing plate and a second lower injection fixing plate are horizontally and oppositely arranged at two ends of the top surface of the rear mould base plate respectively, second square irons are vertically and oppositely arranged at two ends of the top surface of the first lower injection fixing plate and the top surface of the second lower injection fixing plate respectively, a first lower injection thimble plate and a second lower injection thimble plate are horizontally arranged between the adjacent second square irons respectively, a first upper injection thimble plate is arranged on the top surface of the first lower injection thimble plate in a butt joint mode, a second upper injection thimble plate is arranged on the top surface of the second lower injection thimble plate in a butt joint mode, a first rear injection mould plate and a second rear injection mould plate are erected on the top surface of the adjacent second square irons respectively, the first upper thimble plate is connected with the first rear injection mould plate in a sliding mode through a guide pillar, the second upper thimble plate is connected with the second rear injection mould plate in a sliding mode through a guide pillar, and a first rear injection mould core is arranged in the first lower injection mould plate, and a second injection rear mold core is arranged in the second injection rear mold plate.

Technical Field

The invention belongs to the technical field of processing of automotive interior parts, and particularly relates to a double-color electroplating processing method of an automotive interior part.

Background

Automotive interior spare occupies a great proportion in automobile manufacturing, for example the handle of car, interior trim panel, inboard bounding wall, preceding wall decorative board etc. all belong to automotive interior decoration, these decorations all are injection moulding earlier, then handle through surface treatment technique, reach higher quality, better outward appearance and stronger performance, thereby let the function of automotive interior more distantly, and the decoration that passes through surface treatment is plastic material because of its main part, and its surface plating metal, light quality and better aesthetic property can be guaranteed to such decoration.

In the prior art, the automotive interior part made of ABS & PC composite plastic needs to be processed by a plurality of processes in the injection molding and surface electroplating treatment process, and the method comprises the following specific steps: 1. injection molding of an ABS piece blank; 2. injection molding a PC piece blank; 3. electroplating the ABS part; 4. assembling an ABS electroplated part and a PC part; the processing method has complex procedures, can not perform one-time injection molding on ABS & PC parts, not only prolongs the production period and increases the labor cost, but also can not ensure the quality of the assembled parts.

Disclosure of Invention

The invention provides a double-color electroplating processing method of an automotive interior part aiming at the defects in the prior art, and the specific technical scheme is as follows:

a double-color electroplating processing method of an automotive interior part comprises the following steps:

s1: two-color injection molding

During injection molding, firstly, assembling a double-color injection mold, then, automatically injecting a PC part by an injection molding machine according to a flow set by a PLC, and after the PC part is completed, automatically rotating the double-color injection mold in an injection molding machine and then molding and encapsulating an ABS (acrylonitrile butadiene styrene) electroplating part, so that one-time molding is realized and a double-color plastic blank is obtained;

s2: electroplating and dispergating of bicolor blank

S2.1 pretreatment before electroplating

Sequentially carrying out oil removal, hydrophilization, coarsening, neutralization and palladium water activation procedures on the bicolor plastic blank obtained in the step S1 to obtain a bicolor plastic blank after electroplating pretreatment;

s2.2 dispergation

Soaking the electroplated and pretreated double-color plastic blank obtained in the step S2.1 in prepared dispergation liquid medicine, controlling the PC surface of the double-color plastic blank not to be plated through the dispergation liquid medicine, and adopting dispergation liquid medicine with different concentrations according to different materials of the structural surface of the plated part of the ABS;

s2.2 electroless plating

And (3) soaking the work piece after the glue is removed in the step (S2.2) in a container containing a plating solution to obtain a bicolor plastic electroplated part.

Further, the plating solution in the step S2.2 is any one of a copper plating solution, a nickel plating solution, and a chromium plating solution.

Further, the dispergation liquid medicine is mainly prepared by mixing the following components:

3-15 g/L of sodium hydroxide, 1-10 g/L of disodium ethylene diamine tetraacetate and 1-10 g/L of sodium carbonate.

Further, the double-color mold comprises a front mold and a rear mold, and the front mold and the rear mold are in detachable butt joint fit;

the front mold comprises a front mold base plate, three first square irons are vertically arranged on the top surface of the front mold base plate at equal intervals, a first injection upper fixing plate and a second injection upper fixing plate are horizontally arranged between the adjacent first square irons respectively, a first injection runner plate is arranged on the first injection upper fixing plate, a second injection runner plate is arranged on the second injection upper fixing plate, a first injection front mold plate and a second injection front mold plate are erected on the top surfaces of the adjacent first square irons respectively, the first injection heat runner plate is connected with the first injection front mold plate in a sliding mode through a guide pillar, the second injection heat runner plate is connected with the second injection front mold plate in a sliding mode through the guide pillar, the first front mold plate is connected with the second front mold plate through a front mold extruding block, a first front mold core is arranged in the first front mold plate, and a second front mold core is arranged in the second front mold plate;

the rear mould comprises a rear mould base plate, wherein a first lower injection fixing plate and a second lower injection fixing plate are horizontally and oppositely arranged at two ends of the top surface of the rear mould base plate respectively, second square irons are vertically and oppositely arranged at two ends of the top surface of the first lower injection fixing plate and the top surface of the second lower injection fixing plate respectively, a first lower injection thimble plate and a second lower injection thimble plate are horizontally arranged between the adjacent second square irons respectively, a first upper injection thimble plate is arranged on the top surface of the first lower injection thimble plate in a butt joint mode, a second upper injection thimble plate is arranged on the top surface of the second lower injection thimble plate in a butt joint mode, a first rear injection mould plate and a second rear injection mould plate are erected on the top surface of the adjacent second square irons respectively, the first upper thimble plate is connected with the first rear injection mould plate in a sliding mode through a guide pillar, the second upper thimble plate is connected with the second rear injection mould plate in a sliding mode through a guide pillar, and a first rear injection mould core is arranged in the first lower injection mould plate, and a second injection rear mold core is arranged in the second injection rear mold plate.

The invention has the beneficial effects that:

according to the invention, ABS & PC parts are subjected to one-time injection molding through a double-color injection mold, then direct double-color electroplating is performed, and according to the different properties of PC and ABS, the PC surface is ensured not to be plated during electroplating through a peptizing agent; the invention saves one-time injection molding process and one-time assembly process in the process, thereby simplifying the production process, compressing the production cycle, improving the yield and the quality of the automotive upholstery, improving the working efficiency and reducing the labor cost; meanwhile, the PC back of the plated part can not be plated any more, so that the raw material cost is saved.

Drawings

Fig. 1 shows a schematic perspective view of a front mold in a two-color mold according to the present invention;

fig. 2 shows a schematic perspective view of a rear mold in the two-color mold of the present invention.

Shown in the figure: 1. a front mold; 101. a front mold base plate; 102. a first square iron; 103. a first shooting upper fixing plate; 104. a second shooting upper fixing plate; 105. a first heat jet runner plate; 106. a second heat jet runner plate; 107. a first pre-injection template; 108. a second pre-injection template; 109. a front mold compaction block; 1010. a first front mold core; 1011. a second front mold core; 2. a lower die; 201. a rear mold base plate; 202. second square iron; 203. a first lower injection fixing plate; 204. a second lower fixed plate; 205. a first injection lower ejector plate; 206. a first ejector pin plate; 207. a second injection lower ejector plate; 208. a second ejector pin plate is shot; 209. a first post-injection template; 2010. a second post-injection template; 2011. a first injection rear mold core; 2012. a first injection rear mold core; 2013. a first PC injection material part; 2014. the second shot ABS material part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A double-color electroplating processing method of an automotive interior part comprises the following steps:

s1: two-color injection molding

During injection molding, firstly, assembling a double-color injection mold, then, automatically injecting a PC part by an injection molding machine according to a flow set by a PLC, and after the PC part is completed, automatically rotating the double-color injection mold in an injection molding machine and then molding and encapsulating an ABS (acrylonitrile butadiene styrene) electroplating part, so that one-time molding is realized and a double-color plastic blank is obtained;

s2: electroplating and dispergating of bicolor blank

S2.1 pretreatment before electroplating

Sequentially carrying out oil removal, hydrophilization, coarsening, neutralization and palladium water activation procedures on the bicolor plastic blank obtained in the step S1 to obtain a bicolor plastic blank after electroplating pretreatment;

s2.2 dispergation

Soaking the electroplated and pretreated double-color plastic blank obtained in the step S2.1 in prepared dispergation liquid medicine, controlling the PC surface of the double-color plastic blank not to be plated through the dispergation liquid medicine, and adopting dispergation liquid medicine with different concentrations according to different materials of the structural surface of the plated part of the ABS;

s2.2 electroless plating

And (3) soaking the work piece after the glue is removed in the step (S2.2) in a container containing a plating solution to obtain a bicolor plastic electroplated part.

According to the technical scheme, the double-color electroplating processing method is characterized in that ABS & PC parts are subjected to one-time injection molding through a double-color injection mold, then direct double-color electroplating is performed, and according to the different properties of PC and ABS, the PC surface is prevented from being plated during electroplating through peptizing liquid medicine; the double-color electroplating processing method saves a one-time injection molding process and a one-time assembling process in the process, thereby simplifying the production process, compressing the production cycle, improving the yield and the quality of the automotive interior trim part, improving the working efficiency and reducing the labor cost; meanwhile, the PC back of the plated part can not be plated any more, so that the raw material cost is saved.

The plating solution in the step S2.2 is any one of a copper plating solution, a nickel plating solution, and a chromium plating solution.

The dispergation liquid medicine is mainly prepared by mixing the following components:

3-15 g/L of sodium hydroxide, 1-10 g/L of disodium ethylene diamine tetraacetate and 1-10 g/L of sodium carbonate.

Through the technical scheme, the electroplating workshop environment is acidic, and certain acid-base neutralization is carried out in the using process, so that the peptizing liquid medicine is easy to lose efficacy, and therefore, in the peptizing liquid medicine, a proper amount of disodium ethylene diamine tetraacetate is added to serve as a complexing stabilizer, so that a longer service cycle of the alkaline peptizing liquid medicine is obtained, and the production process of the double-color injection molding part is stabilized.

As shown in fig. 1 and 2, the two-color mold comprises a front mold and a back mold, and the front mold and the back mold are in detachable butt fit;

the front mold comprises a front mold base plate, three first square irons are vertically arranged on the top surface of the front mold base plate at equal intervals, a first injection upper fixing plate and a second injection upper fixing plate are horizontally arranged between the adjacent first square irons respectively, a first injection runner plate is arranged on the first injection upper fixing plate, a second injection runner plate is arranged on the second injection upper fixing plate, a first injection front mold plate and a second injection front mold plate are erected on the top surfaces of the adjacent first square irons respectively, the first injection heat runner plate is connected with the first injection front mold plate in a sliding mode through a guide pillar, the second injection heat runner plate is connected with the second injection front mold plate in a sliding mode through the guide pillar, the first front mold plate is connected with the second front mold plate through a front mold extruding block, a first front mold core is arranged in the first front mold plate, and a second front mold core is arranged in the second front mold plate;

the rear mould comprises a rear mould base plate, wherein a first lower injection fixing plate and a second lower injection fixing plate are horizontally and oppositely arranged at two ends of the top surface of the rear mould base plate respectively, second square irons are vertically and oppositely arranged at two ends of the top surface of the first lower injection fixing plate and the top surface of the second lower injection fixing plate respectively, a first lower injection thimble plate and a second lower injection thimble plate are horizontally arranged between the adjacent second square irons respectively, a first upper injection thimble plate is arranged on the top surface of the first lower injection thimble plate in a butt joint mode, a second upper injection thimble plate is arranged on the top surface of the second lower injection thimble plate in a butt joint mode, a first rear injection mould plate and a second rear injection mould plate are erected on the top surface of the adjacent second square irons respectively, the first upper thimble plate is connected with the first rear injection mould plate in a sliding mode through a guide pillar, the second upper thimble plate is connected with the second rear injection mould plate in a sliding mode through a guide pillar, and a first rear injection mould core is arranged in the first lower injection mould plate, and a second injection rear mold core is arranged in the second injection rear mold plate.

Through above-mentioned technical scheme, the double-shot moulding mould that sets up can be collected the mould of two kinds of material parts to a pair mould on, this double-shot moulding mould can be with ABS & PC part once only injection moulding, has saved once injection moulding process and once assembly process in the process to production processes has been simplified.

The working principle of the invention is as follows:

(one) two-color injection molding

In the design of the mold, two materials are designed on a set of double-color mold, and a joint sealing adhesive for controlling a first injection and a second injection is designed;

the reasonable design of the flow channel of the double-color mold is mainly used for compensating pressure and controlling cold charge;

in the injection molding process, the problems of plating leakage, cracking and the like caused by the fact that the electroplating coarsening cannot reach the position are prevented by controlling the stress of the plastic part;

during injection molding, firstly, assembling a double-color injection mold, then, automatically injecting a PC part by an injection molding machine according to a flow set by a PLC, and after the PC part is completed, automatically rotating the double-color injection mold in an injection molding machine and then molding and encapsulating an ABS (acrylonitrile butadiene styrene) electroplating part, thereby realizing one-time molding in place;

electroplating and dispergating of (II) bicolor blank

During electroplating, the PC surface of the workpiece is controlled not to be plated by the peptizing agent, and the alkaline peptizing agent with different concentrations is adopted according to different materials of the structure surface of the ABS plated part; the effective components in the dispergation generate proper chemical reaction on stannate on the surface of the workpiece, so that the PC surface cannot be plated; meanwhile, because the environment of an electroplating workshop is acidic, certain acid and alkali neutralization can be carried out in the using process, so that the peptizing liquid medicine is easy to lose efficacy, and therefore, a proper amount of disodium ethylene diamine tetraacetate is added into the peptizing liquid medicine as a complexing stabilizer, so that the longer service cycle of the alkaline peptizing liquid medicine is obtained, and the production process of the double-color injection molding part is stabilized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.