CN103112130B - Plastic mold and production method thereof - Google Patents
Plastic mold and production method thereof Download PDFInfo
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- CN103112130B CN103112130B CN201310064549.2A CN201310064549A CN103112130B CN 103112130 B CN103112130 B CN 103112130B CN 201310064549 A CN201310064549 A CN 201310064549A CN 103112130 B CN103112130 B CN 103112130B
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Abstract
The invention discloses a plastic mold and a production method thereof. The plastic mold comprises an upper die and a lower die, and is characterized in that a forming die cavity is arranged on the lower die, and an electrothermal film is arranged on the forming die cavity and is composed of a nano ceramic base coating sprayed on the surface of the forming die cavity, an indium tin metal oxide conducting resistive film layer plated on the nano ceramic base coating, and a nano ceramic surface coating sprayed on the indium tin metal oxide conducting resistive film layer; and two conductive terminals electrically connected with the indium tin metal oxide conducting resistive film layer are fixed on the left and right edges of the forming die cavity. A plastic product produced by the plastic mold has the advantages of high surface gloss and few weld marks, and the appearance quality and production efficiency of the plastic product are substantially improved.
Description
Technical field
The present invention relates to a kind of mould, particularly relate to the plastic mould that a kind of die cavity inner surface can generate heat.
Background technology
In recent years, develop rapidly and general and engineering plastics improving constantly at aspects such as intensity and precision along with plastics industry, the range of application of plastic products is also in continuous expansion, as: household electrical appliance, instrument and meter, construction equipment, the various fields such as auto industry, haberdashery and hardware, the shared ratio of plastic products just rapidly increases.A working of plastics reasonable in design often can replace a plurality of conventional metals parts.The shape of mould is determining the profile of these products, and the crudy of mould and precision are also just determining the quality of these products.Yet, in today of die industry develop rapidly, still there are many defects in injection-molded item, such as pressing from both sides water wave, surface not gloss, shrink, burr, bubble, weld mark etc.Due to reasons such as material property, technology of die manufacturing, these injection defects exist for many years always, do not obtain real solution.
Summary of the invention
In order better to overcome the existing above-mentioned defect of prior art, the object of the present invention is to provide a kind of plastic mould and production method thereof.
Plastic mould of the present invention comprises upper die and lower die, shaping mold cavity is arranged on counterdie, be provided with Electric radiant Heating Film on shaping mold cavity, described Electric radiant Heating Film by being sprayed on the lip-deep nano ceramics priming coat of shaping mold cavity, be plated in the indium tin metal oxide conducting resistive layer on described nano ceramics priming coat, the nano ceramics finishing coat be sprayed on indium tin metal oxide conducting resistive layer forms, and is fixed with two conducting terminals that are electrically connected to indium tin metal oxide conducting resistive layer on the left and right edges of shaping mold cavity; The percentage by weight of nano ceramics priming coat is configured to: inorganic nano level sol-gel silica is 20%-40%; IPA (isopropyl alcohol) is 40%-45%; ZrO
2(zirconia) 10%-15%; Ethyl orthosilicate is 10%-15%; Acetic acid is 1%-3%; The percentage by weight of nano ceramics finishing coat is configured to: inorganic nano level sol-gel silica is 10%-40%; IPA (isopropyl alcohol) is 20%-25%; PMA (1-Methoxy-2-propyl acetate) is 15%-21%; ZrO
2(zirconia) is 15%-20%; Ethyl orthosilicate is 10%-15%; Acetic acid is 1%-2%; HMW silicone oil 1%-3%, the molecular weight of described HMW silicone oil is in the 5000-11000g/mol scope.
Wherein, nano ceramics priming coat and nano ceramics finishing coat thickness are 10 ~ 30 microns, and preferably, the nano ceramics primer thickness is 25 microns, and nano ceramics finishing coat thickness is 20 microns.
More preferably, indium tin metal oxide conducting resistive layer is to utilize magnetron sputtering technique and the SnO2 conducting film of mixing indium that forms, and thicknesses of layers is 150-350nm, preferably 250nm.
The method of manufacturing above-mentioned plastic mould is specially: the shaping mold cavity to machining completion carries out surface degreasing scrubbing cleaning, then sandblast, electrostatic spraying insulating nano ceramic bottom coating, baking makes the nano ceramics subbing solidify to form the nano ceramics priming coat under 200 ℃; Utilize magnetron sputtering technique to plate indium tin metal oxide conducting resistive layer on the nano ceramics priming coat; After oven dry again on indium tin metal oxide conducting resistive layer the electrostatic spraying easy-to-release ceramic be not stained with the nano ceramics coating materials, baking under 280 ℃ afterwards, make easy-to-release ceramic not be stained with the nano ceramics coating materials and solidify to form nano ceramics face finishing coat.
The plasthetics surface gloss of utilizing plastic mould of the present invention to produce is high, weld mark is few, even there is no weld mark, has significantly promoted the quality of plasthetics.In addition, injection moulding tool of the present invention is simple in structure, production technology is simple, can solve due to material cause, mould is former thereby the plasthetics blemish that causes, makes product have higher added value, adopts the heating of Electric radiant Heating Film secondary cavity, electrothermal calefactive rate is fast, thermal inertia is little, can reduce the injection moulding production cycle, enhances productivity and benefit.
the accompanying drawing explanation
Further illustrate the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is mould structure schematic diagram of the present invention.
The specific embodiment
In order to be easier to understand the present invention, below in conjunction with concrete diagram, further set forth Spirit Essence of the present invention.
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment: the application of the home appliance panel injection mold of certain brand porous PC material.
The crudy of an injection-molded item is to a great extent by die quality and Shooting Technique decision, and the present invention realizes the change of Shooting Technique in the structure by changing plastic mould, and then promotes the quality of injection-molded item.As shown in Figure 1, plastic mould of the present invention comprises patrix 1 and counterdie 2, and shaping mold cavity is arranged on counterdie 2, is provided with Electric radiant Heating Film 3 on shaping mold cavity.Described Electric radiant Heating Film 3, by being sprayed on the lip-deep nano ceramics priming coat of shaping mold cavity, being plated in the indium tin metal oxide conducting resistive layer (ITO conductive resistance rete) on described nano ceramics priming coat, the nano ceramics finishing coat formation on spraying ITO conductive resistance rete, is fixed with two conducting terminals 4 that are electrically connected to ITO conductive resistance rete on the left and right edges of shaping mold cavity.
Nano ceramic coat (comprising nano ceramics priming coat and nano ceramics finishing coat) has excellent heat-insulation and heat-preservation insulation effect, does not come off, does not burn, acid-alkali-corrosive-resisting, to solidify and form through electrostatic spraying by ceramic coating, nano ceramics priming coat and nano ceramics finishing coat thickness after solidifying are 10 ~ 30 microns, can select the thickness of priming coat to be greater than the thickness of finishing coat, for example primer thickness is 20 microns, and the thickness of finishing coat is 10 microns.
ITO conductive resistance rete can be a kind of SnO that mixes indium formed through magnetron sputtering
2semiconductor conducting film, thicknesses of layers is 150-350nm, can difference as required select to adjust, as selects 200nm, 250nm or 320nm etc.In addition, can form described resistive layer by the mode of magnetron sputtering repeatedly, the thicknesses of layers that for example sputter for the first time forms is the 250nm left and right, and then adjusts the thicknesses of layers of local electrical resistance rete by the local magnetron sputtering of secondary.Different thicknesses of layers has different resistance, actual with the time can change the resistance sizes of resistive layer and then the caloric value of regulating resistance rete by changing thicknesses of layers, adopt this method to solve the distribution in the interior plastic material of mould molding die cavity temperature field.Before shaping mold cavity is carried out to magnetron sputtering, adopt the method for paster protection, keep the conduction of resistive mode layer and the metal material of shaping mold cavity own to cut off, and draw conductive electrode.
While utilizing mould of the present invention to carry out injection moulding, can solve in injection moulding process the goods glossiness not high enough, plastic material produces the problem of weld mark in position, hole fusion.Mould is in the mould filling process, ITO conductive resistance rete heating power, the shaping mold cavity internal temperature raises, can compensate on the one hand the temperature loss of plastic material when filling die cavity, increase the mobility of plastic material, make plastic material unimpededly be full of fast shaping mold cavity and mould, the plasthetics surface gloss of producing is high; On the other hand, because the conductive resistance rete can also improve the temperature of the plastic material at weld mark place, the fusion of can fully flowing of melt run place plastic material, thus reduce or eliminate weld mark, significantly promoted the quality of plasthetics.In addition, due to the very thin thickness of Electric radiant Heating Film (nano ceramic coat and ITO conductive resistance rete) own, after outage, the entrained heat of Electric radiant Heating Film can be absorbed by die steel and plastic material very soon, can not exert an influence to plastic material.
The percentage by weight of nano ceramics priming coat is configured to: inorganic nano level sol-gel silica ((silica Sol-Gel) SiO
2) be 30%; IPA (isopropyl alcohol) is 40%; ZrO
2(zirconia) 15%; Ethyl orthosilicate is 12%; Acetic acid is 3%.The nano ceramics priming coat provides adherence, insulation, corrosion resistant high rigidity base coat on the shaping mold cavity surface.
The percentage by weight of nano ceramics finishing coat is configured to: inorganic nano level sol-gel silica ((silica Sol-Gel) SiO
2) be 20%; IPA (isopropyl alcohol) is 25%; PMA (1-Methoxy-2-propyl acetate) is 20%; ZrO
2(zirconia) is 15%; Ethyl orthosilicate is 15%; Acetic acid is 2%; HMW silicone oil 3%.The high rigidity face coating that the nano ceramics finishing coat is adherence, insulation, corrosion-resistant, high surface tension, the easily demoulding.
Inorganic nano level sol-gel silica dioxide coating because it is heat-resisting, high rigidity, insulation meet requirement of the present invention, but its reactionless functional group, adhesion force is poor, thereby overcome the adhesion force problem with inorganic nano level sol-gel silica and organic resin hydridization, reach that the present invention is heat-resisting, high rigidity, adherence are good, insulating requirements, its molecular formula is as follows:
According to technique with to the requirement of coating performance, the molecular weight of described HMW silicone oil can be chosen in the 5000-11000g/mol scope.
Concrete shaping mold cavity spraying coating process is as follows:
Shaping mold cavity to the completion of machining carries out surface degreasing scrubbing cleaning, then sandblast, and spraying insulating nano ceramic coating, baking makes ceramic coating solidify to form the nano ceramics priming coat under 200 ℃; Utilize magnetron sputtering technique to plate ITO conductive resistance rete on the nano ceramics priming coat; After oven dry again on ITO conductive resistance rete the spraying easy-to-release ceramic be not stained with ceramic coating, baking under 280 ℃ afterwards, make easy-to-release ceramic not be stained with ceramic coating and solidify to form the nano ceramics finishing coat, the shaping mold cavity spraying process has just completed like this.The shaping mold cavity completed is assemblied on mould, notes in assembling process damaging mold cavity surface, connect conducting terminal in Electric radiant Heating Film after having assembled mould.The mould completed is arranged on injection machine, and on the conducting terminal of mould, access DC controlled case, when machine is adjusted in injection moulding, adjust voltage swing, to adjust the temperature on mold cavity surface, until produce the plasthetics of high-quality.
Practice shows, Tool and Die Technology of the present invention is applied on the home appliance panel of certain brand, when the injection molding PC material, can obtain high glaze, the high-grade panel of weldless trace.
Claims (5)
1. a plastic mould, it comprises patrix (1) and counterdie (2), shaping mold cavity is arranged on counterdie (2), it is characterized in that: be provided with Electric radiant Heating Film (3) on shaping mold cavity, described Electric radiant Heating Film (3) is by being sprayed on the lip-deep nano ceramics priming coat of shaping mold cavity, be plated in the indium tin metal oxide conducting resistive layer on described nano ceramics priming coat, the nano ceramics finishing coat be sprayed on indium tin metal oxide conducting resistive layer forms, be fixed with two metal terminals (4) that are electrically connected to indium tin metal oxide conducting resistive layer on the left and right edges of shaping mold cavity, described nano ceramics priming coat is adherence, insulation, corrosion resistant high rigidity base coat, the high rigidity face coating that described nano ceramics finishing coat is adherence, insulation, corrosion-resistant, high surface tension, the easily demoulding,
The percentage by weight of described nano ceramics priming coat is configured to: inorganic nano level sol-gel silica is 20%-40%; IPA (isopropyl alcohol) is 40%-45%; ZrO
2(zirconia) 10%-15%; Ethyl orthosilicate is 10%-15%; Acetic acid is 1%-3%; The percentage by weight of nano ceramics finishing coat is configured to: inorganic nano level sol-gel silica is 10%-40%; IPA (isopropyl alcohol) is 20%-25%; PMA (1-Methoxy-2-propyl acetate) is 15%-21%; ZrO
2(zirconia) is 15%-20%; Ethyl orthosilicate is 10%-15%; Acetic acid is 1%-2%; HMW silicone oil 1%-3%, the molecular weight of described HMW silicone oil is in the 5000-11000g/mol scope;
Described indium tin metal oxide conducting resistive layer is to utilize magnetron sputtering technique and the SnO that mixes indium that forms
2conducting film, thicknesses of layers is 150-350nm.
2. plastic mould as claimed in claim 1, it is characterized in that: nano ceramics priming coat and nano ceramics finishing coat thickness are 10 ~ 30 microns.
3. plastic mould as claimed in claim 2, it is characterized in that: the nano ceramics primer thickness is 25 microns, nano ceramics finishing coat thickness is 20 microns.
4. plastic mould as claimed in claim 3, it is characterized in that: indium tin metal oxide conducting resistive layer thickness is 250nm.
5. produce the method for the described plastic mould of above-mentioned arbitrary claim, it is characterized in that: the shaping mold cavity to machining completion carries out surface degreasing scrubbing cleaning, then sandblast, electrostatic spraying insulating nano ceramic bottom coating, baking makes the nano ceramics subbing solidify to form the nano ceramics priming coat under 200 ℃; Utilize magnetron sputtering technique to plate indium tin metal oxide conducting resistive layer on the nano ceramics priming coat; After oven dry again on indium tin metal oxide conducting resistive layer the electrostatic spraying easy-to-release ceramic be not stained with the nano ceramics coating materials, baking under 280 ℃ afterwards, make easy-to-release ceramic not be stained with the nano ceramics coating materials and solidify to form nano ceramics face finishing coat.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3023214A1 (en) * | 2014-11-20 | 2016-05-25 | Kunststoff-Technik Scherer & Trier GmbH & Co. KG | Injection moulding tool, method for producing an injection moulding component and injection moulding component |
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| CN109803508B (en) * | 2017-11-16 | 2021-04-20 | 比亚迪股份有限公司 | Shell of electronic equipment, preparation method of shell and electronic equipment |
| CN109466038A (en) * | 2018-12-18 | 2019-03-15 | 滁州迪蒙德模具制造有限公司 | A kind of intelligent decorative panel injection molding temprature control method of mold |
| CN110900999A (en) * | 2019-11-19 | 2020-03-24 | 湖南工业大学 | Quick-drying and shaping device for fiber reinforced starch composite material |
| CN111645271B (en) * | 2020-06-12 | 2022-04-29 | 瑞声科技(新加坡)有限公司 | Injection mold for manufacturing basin stand structure of sound production device |
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| CN100509693C (en) * | 2007-09-26 | 2009-07-08 | 山东轻工业学院 | Method for preparing micro-nano composite ceramic die material |
| CN101210325B (en) * | 2007-12-25 | 2010-06-09 | 浙江工业大学 | Nano composite anti-wear coating composition used for hot forging die and application thereof |
| CN102301040B (en) * | 2009-01-30 | 2014-10-15 | 夏普株式会社 | Mold, mold manufacturing method and method for manufacturing anti-reflection film using the mold |
| CN102108534A (en) * | 2010-11-30 | 2011-06-29 | 华侨大学 | Mold making method based on ultrasonic pulse electrodeposition and spray forming and mold |
| CN102650029A (en) * | 2012-04-25 | 2012-08-29 | 常州大学 | Preparation method for nanometer ceramic composite coating material on surface of hot work die steel |
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| EP3023214A1 (en) * | 2014-11-20 | 2016-05-25 | Kunststoff-Technik Scherer & Trier GmbH & Co. KG | Injection moulding tool, method for producing an injection moulding component and injection moulding component |
| EP3431243A1 (en) * | 2014-11-20 | 2019-01-23 | Samvardhana Motherson Innovative Autosystems B.V. & Co. KG | Injection moulding tool and method for producing an injection moulding component and injection moulding component |
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Address after: 528306 Guangdong province Foshan city Shunde District Ronggui street high Li Industrial Zone chaoguang Road No. 23 Patentee after: Guangdong Cole Technology Development Co., Ltd. Address before: 528306 Guangdong province Foshan city Shunde District Ronggui street high Li Industrial Zone chaoguang Road No. 23 Patentee before: Foshan Koer Technology Development Co., Ltd. |