WO2012071259A1 - Method and structure of binding plastic and metal material together - Google Patents

Method and structure of binding plastic and metal material together Download PDF

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Publication number
WO2012071259A1
WO2012071259A1 PCT/US2011/061340 US2011061340W WO2012071259A1 WO 2012071259 A1 WO2012071259 A1 WO 2012071259A1 US 2011061340 W US2011061340 W US 2011061340W WO 2012071259 A1 WO2012071259 A1 WO 2012071259A1
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WO
WIPO (PCT)
Prior art keywords
micro
plastic material
holes
hole
metal substrate
Prior art date
Application number
PCT/US2011/061340
Other languages
French (fr)
Inventor
Sheng-Hung Yi
Shih-Chang Yeh
Chia-Ming Chang
Shaupoh Wang
Original Assignee
Taiwan Green Point Enterprises Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taiwan Green Point Enterprises Co., Ltd. filed Critical Taiwan Green Point Enterprises Co., Ltd.
Publication of WO2012071259A1 publication Critical patent/WO2012071259A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14311—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • B29C45/14221—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure by tools, e.g. cutting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

Definitions

  • the present invention relates to a method and structure of binding plastic and metal material together. Particularly, it relates to the manufacturing method and structure about a casing of a mobile phone or a consumer electronic product.
  • the resulting product enhances the design flexibility and feasibility during possessing the metal component and also increases the aesthetic appearance, strength and the precision of manufacturing. Moreover, this also can solve the poor net-shape capability of plastic for assembly.
  • Die casting process is applicable to produce metal component but the components' strength is low due to excessive porosity and surface defects. Die casting component's cost is high as it requires expensive CNC machining and manual repair.
  • stamping process can provide good quality and smaller dimensional variance, the application of stamping component is very limited as the process cannot produce essential structural features such as ribs, boss or thickness variation.
  • the object of the present invention is to provide a method and structure of binding plastic and metal material together. It can solve the existing problems such as forging process having poor net-shape capability and requiring further expensive CNC machining, die-casting costing too high, stamping process having too much limits about structural features.
  • a method of binding plastic and metal material together comprising:
  • drilling step applying laser beam on a selected surface area of a metal substrate so as to form many micro-holes; the micro-holes being defined as having an hole diameter ranging from 0.05 mm to 0.S mm and having a hole depth substantially equal or smaller than a half of a thickness of the metal substrate; each micro-hole having a rough inner surface;
  • molding step providing a mold having a mold cavity, injecting a melted plastic material into the mold cavity of the mold on the selected surface area by an injection molding process to fill the micro-holes with the melted plastic material, the melted plastic material being above a melting point of the plastic material;
  • solidifying step cooling down the melted plastic material below the melting point of the plastic material so as to become a solidified plastic material in the mold cavity, removing the mold, the solidified plastic material being engaging with the rough inner surfaces of the micro-holes of the metal substrate.
  • a structure of binding plastic and metal material together comprising:
  • a metal substrate having at least one selected surface area, many micro-holes being formed on the selected surface area; the micro-holes being defined as having an hole diameter ranging from 0.0S mm to 0.5 mm and having a hole depth substantially equal or smaller than a half of a thickness of the metal substrate; each micro-hole having a rough inner surface; and a solidified plastic material being engaging with the rough inner surfaces of the micro-holes of the metal substrate.
  • FIG 1 is a flow chart showing the method of the present invention.
  • FIG 2 is a perspective view of a laser processing machine.
  • FIG 3 is a perspective view of a metal substrate with two selected surface area.
  • FIG 4 is a view illustrating that the micro-holes are formed by laser beam.
  • FIG 5A is a view showing the micro-hole is not yet formed.
  • FIG SB is a view showing the micro-hole is forming.
  • FIG SC is a view showing that it continues to form another micro-hole.
  • FIG 6 is a view showing the molding step.
  • FIG 7 is a view showing the solidifying step.
  • FIG 8 is an enlarged view showing a rough inner surface of a micro-hole before filling.
  • FIG 9 is an enlarged view showing the rough inner surface of the micro-hole after filling.
  • FIG 10 is a view illustrating a refined layer on the metal substrate.
  • the present invention includes the method and the structure of binding plastic and metal material together.
  • the method mainly comprises a drilling step SI, a molding step 52, and a solidifying step 53.
  • the drilling step 51 referring to FIGS. 2, 3, 4 and 5A to 5C, applying laser beam (such as by a laser processing machine shown in FIG 2) on a selected surface area 110 of a metal substrate 100 (or called metal component, such as a casing of a consumer electronic product) so as to form many micro-holes 200; the micro-holes 200 being defined as having an hole diameter HI ranging from 0.05 mm to 0.5 mm and having a hole depth H2 substantially equal or smaller than a half of a thickness T of the metal substrate 100; each micro-hole 200 having a rough inner surface 210.
  • laser beam such as by a laser processing machine shown in FIG 2
  • a selected surface area 110 of a metal substrate 100 or called metal component, such as a casing of a consumer electronic product
  • the molding step 52 as illustrated in FIGS. 6, 8, and 9, provide a mold 400 having a mold cavity 410, injecting a melted plastic material 300 into the mold cavity 410 of the mold 400 on the selected surface area 110 by an injection molding process to fill the micro-holes 200 with the melted plastic material 300.
  • the melted plastic material 300 is above a melting point of the plastic material 300.
  • This structure comprises a metal substrate 100 and a solidified plastic material 300, as shown in FIG 7.
  • the metal substrate 100 has at least one selected surface area 110.
  • Many micro-holes 200 are formed on the selected surface area 110.
  • the micro-holes 200 is defined as having an hole diameter HI ranging from 0.0S mm to 0.5 mm and having a hole depth H2 substantially equal or smaller than a half of a thickness T of the metal substrate 100.
  • Each micro-hole 200 has a rough inner surface 210.
  • said solidified plastic material 300 is engaging with the rough inner surfaces 210 of the micro-holes 200 of the metal substrate 100.
  • each micro-hole 200 has a hole axis 220 which is substantially perpendicular to the selected surface area 110.
  • the rough inner surface 210 of each micro-hole 200 includes at least one protruding portion 211 and at least one recessed portion 212 so that the solidified plastic material 300 filled in the micro-holes 200 are firmly bonded on the metal substrate 100.
  • the selected surface area 110 of the metal substrate 100 is optional to be decorated and finished by a refined layer 150 before the molding step 52.
  • the refined layer 150 could be a protective film or a coating layer.
  • the laser beam is preferably at least larger than 15W (Watts) and is emitted at least a hundred times per second; and the melted plastic material 300 might be kept between 180 and 350 degree Celsius (°C).
  • micro-holes 200 can be distributed at least one micro-hole per square millimeter.
  • the temperature of the mold is about 90 (°C) and the temperature of the injection device (including nuzzle, the front of the screw, the middle of the screw, and the back of the screw, all not shown) is approximately 300 (°C).
  • the injection pressure remains at 100 bars and the speed is kept at 50 mm/s.
  • the maximum pull strength of the combination force is around 2.5 kgf/mm 2 and the maximum shear strength of the combination force is around 1.5 kgf/mm 2 .
  • the plastic material can be bonded onto the metal substrate (or component) followed by insert molding at any locations so as to allow great design flexibility.
  • the metal component can be decorated and finished prior to the insert molding.
  • the proposed protective film or coating and the tool design can be applied to avoid cosmetic damage to the finished surface during insert molding.
  • the proposed method can be applied to produce products with more robust design at a lower cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A method and structure of binding plastic and metal material together is disclosed. About the method, the surface of the metal substrate is applied by laser beam to form many micro-holes and then to inject plastic material on a selected area of the metal substrate by a mold. So, the final structure comprises the metal substrate and the solidified plastic material bonded together by these micro-holes. The resulting product enhances the design flexibility and feasibility during possessing the metal component and also increases the aesthetic appearance, strength and the precision of manufacturing. Moreover, this also can solve the poor net-shape capability of plastic for assembly.

Description

TITLE
METHOD AND STRUCTURE OF BINDING PLASTIC AND METAL MATERIAL TOGETHER
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method and structure of binding plastic and metal material together. Particularly, it relates to the manufacturing method and structure about a casing of a mobile phone or a consumer electronic product. The resulting product enhances the design flexibility and feasibility during possessing the metal component and also increases the aesthetic appearance, strength and the precision of manufacturing. Moreover, this also can solve the poor net-shape capability of plastic for assembly.
2. Description of the Prior Art
There is a growing trend for manufacturing the housing covers of consumer electronics with metal alloys so that the product can be thinner, stiffer and more attractive with metallic finish. Many metal forming processes (e.g. die-casting, forging and stamping) have been applied to produce these products. However, the metal components made with die-casting often have excessive porosities, surface defects and large dimensional variance that require expensive secondary operations in machining, repair and finishing. Forging component contains less porosity but its machining cost is even higher due to metal's poor formability in forging process. Although stamping component has good quality and smaller dimensional variance, the application of stamping component is very limited as the process cannot produce essential structural features such as ribs, bosses or thickness variation. Therefore, the existing problems can be listed below. 1. Forging process is applicable to produce metal components with low porosity with alternating cold forging and hot forging. However, forging has poor net-shape capability and the component often requires expensive computer numerical controlled (CNC) machining.
2. Die casting process is applicable to produce metal component but the components' strength is low due to excessive porosity and surface defects. Die casting component's cost is high as it requires expensive CNC machining and manual repair.
3. Stamping process can provide good quality and smaller dimensional variance, the application of stamping component is very limited as the process cannot produce essential structural features such as ribs, boss or thickness variation.
Above all, there are continuing needs for finding suitable methods to produce metal components with lower cost and flexibility in product design.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a method and structure of binding plastic and metal material together. It can solve the existing problems such as forging process having poor net-shape capability and requiring further expensive CNC machining, die-casting costing too high, stamping process having too much limits about structural features.
A method of binding plastic and metal material together comprising:
drilling step: applying laser beam on a selected surface area of a metal substrate so as to form many micro-holes; the micro-holes being defined as having an hole diameter ranging from 0.05 mm to 0.S mm and having a hole depth substantially equal or smaller than a half of a thickness of the metal substrate; each micro-hole having a rough inner surface;
molding step: providing a mold having a mold cavity, injecting a melted plastic material into the mold cavity of the mold on the selected surface area by an injection molding process to fill the micro-holes with the melted plastic material, the melted plastic material being above a melting point of the plastic material; and
solidifying step: cooling down the melted plastic material below the melting point of the plastic material so as to become a solidified plastic material in the mold cavity, removing the mold, the solidified plastic material being engaging with the rough inner surfaces of the micro-holes of the metal substrate.
A structure of binding plastic and metal material together comprising:
a metal substrate having at least one selected surface area, many micro-holes being formed on the selected surface area; the micro-holes being defined as having an hole diameter ranging from 0.0S mm to 0.5 mm and having a hole depth substantially equal or smaller than a half of a thickness of the metal substrate; each micro-hole having a rough inner surface; and a solidified plastic material being engaging with the rough inner surfaces of the micro-holes of the metal substrate.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG 1 is a flow chart showing the method of the present invention.
FIG 2 is a perspective view of a laser processing machine.
FIG 3 is a perspective view of a metal substrate with two selected surface area.
FIG 4 is a view illustrating that the micro-holes are formed by laser beam.
FIG 5A is a view showing the micro-hole is not yet formed.
FIG SB is a view showing the micro-hole is forming.
FIG SC is a view showing that it continues to form another micro-hole.
FIG 6 is a view showing the molding step.
FIG 7 is a view showing the solidifying step.
FIG 8 is an enlarged view showing a rough inner surface of a micro-hole before filling. FIG 9 is an enlarged view showing the rough inner surface of the micro-hole after filling. FIG 10 is a view illustrating a refined layer on the metal substrate.
LIST OF REFERENCE NUMBERS
100 metal substrate
110 selected surface area
ISO refined layer
200 micro-holes
210 rough inner surface
220 hole axis
300 plastic material
400 mold
410 mold cavity
51 drilling step
52 molding step
53 solidifying step
HI hole diameter
H2 hole depth
T thickness
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The present invention includes the method and the structure of binding plastic and metal material together.
About the method, as shown in FIG 1, it mainly comprises a drilling step SI, a molding step 52, and a solidifying step 53.
With regard to the drilling step 51, referring to FIGS. 2, 3, 4 and 5A to 5C, applying laser beam (such as by a laser processing machine shown in FIG 2) on a selected surface area 110 of a metal substrate 100 (or called metal component, such as a casing of a consumer electronic product) so as to form many micro-holes 200; the micro-holes 200 being defined as having an hole diameter HI ranging from 0.05 mm to 0.5 mm and having a hole depth H2 substantially equal or smaller than a half of a thickness T of the metal substrate 100; each micro-hole 200 having a rough inner surface 210.
Concerning the molding step 52, as illustrated in FIGS. 6, 8, and 9, provide a mold 400 having a mold cavity 410, injecting a melted plastic material 300 into the mold cavity 410 of the mold 400 on the selected surface area 110 by an injection molding process to fill the micro-holes 200 with the melted plastic material 300. The melted plastic material 300 is above a melting point of the plastic material 300.
About the solidifying step S3, referring to FIG 6 and FIG 7, cool down the melted plastic material 300 below the melting point of the plastic material 300 so as to become a solidified plastic material 300 in the mold cavity 410. Remove the mold 400. The solidified plastic material 300 is engaging with the rough inner surfaces 210 of the micro-holes 200 of the metal substrate 100.
According to the above mentioned method, the structure of binding plastic and metal material together can be manufactured. This structure comprises a metal substrate 100 and a solidified plastic material 300, as shown in FIG 7.
About the metal substrate 100 has at least one selected surface area 110. Many micro-holes 200 are formed on the selected surface area 110. Referring to FIG SC, the micro-holes 200 is defined as having an hole diameter HI ranging from 0.0S mm to 0.5 mm and having a hole depth H2 substantially equal or smaller than a half of a thickness T of the metal substrate 100. Each micro-hole 200 has a rough inner surface 210.
Regarding this solidified plastic material 300, said solidified plastic material 300 is engaging with the rough inner surfaces 210 of the micro-holes 200 of the metal substrate 100.
Furthermore, as shown in FIGS. 8 and 9, no matter for the method or structure described above, each micro-hole 200 has a hole axis 220 which is substantially perpendicular to the selected surface area 110. The rough inner surface 210 of each micro-hole 200 includes at least one protruding portion 211 and at least one recessed portion 212 so that the solidified plastic material 300 filled in the micro-holes 200 are firmly bonded on the metal substrate 100.
In addition, as illustrated in FIG 10, the selected surface area 110 of the metal substrate 100 is optional to be decorated and finished by a refined layer 150 before the molding step 52. The refined layer 150 could be a protective film or a coating layer.
Besides, the laser beam is preferably at least larger than 15W (Watts) and is emitted at least a hundred times per second; and the melted plastic material 300 might be kept between 180 and 350 degree Celsius (°C).
Moreover, about the said micro-holes 200, they can be distributed at least one micro-hole per square millimeter.
About the actual tests, the temperature of the mold is about 90 (°C) and the temperature of the injection device (including nuzzle, the front of the screw, the middle of the screw, and the back of the screw, all not shown) is approximately 300 (°C). The injection pressure remains at 100 bars and the speed is kept at 50 mm/s.
Based on the test results of the present invention, the maximum pull strength of the combination force is around 2.5 kgf/mm2 and the maximum shear strength of the combination force is around 1.5 kgf/mm2.
The advantages and functions of the present invention can be summarized as follows.
1. The plastic material can be bonded onto the metal substrate (or component) followed by insert molding at any locations so as to allow great design flexibility. 2. The metal component can be decorated and finished prior to the insert molding. The proposed protective film or coating and the tool design can be applied to avoid cosmetic damage to the finished surface during insert molding.
3. Compared with the existing die-casting or forging processes, the proposed method can be applied to produce products with more robust design at a lower cost.
While this invention has been particularly shown and described with references to the preferred embodiments thereof, it will be understood by those skilled in the art that various changes or modifications can be made therein without departing from the scope of the invention by the appended claims.

Claims

WHAT IS CLAIMED IS:
1. A method of binding plastic and metal material together comprising:
drilling step: applying laser beam on a selected surface area of a metal substrate so as to form many micro-holes; said micro-holes being defined as having an hole diameter ranging from 0.05 mm to 0.5 mm and having a hole depth substantially equal or smaller than a half of a thickness of said metal substrate; each micro-hole having a rough inner surface;
molding step: providing a mold having a mold cavity, injecting a melted plastic material into said mold cavity of said mold on said selected surface area by an injection molding process to fill said micro-holes with said melted plastic material, said melted plastic material being above a melting point of said plastic material; and
solidifying step: cooling down said melted plastic material below said melting point of said plastic material so as to become a solidified plastic material in said mold cavity, removing said mold, said solidified plastic material being engaging with said rough inner surfaces of said micro-holes of said metal substrate.
2. The method as defined in Claim 1, wherein each micro-hole has a hole axis which is substantially perpendicular to said selected surface area; and said rough inner surface of each micro-hole includes at least one protruding portion and at least one recessed portion so that said solidified plastic material filled in said micro-holes are firmly bonded on said metal substrate.
3. The method as defined in Claim 1, wherein said selected surface area of the metal substrate being decorated and finished by a refined layer before said molding step; said refined layer being a protective film or a coating layer.
4. The method as defined in Claim 1, wherein said laser beam is at least larger than 1SW; and said melted plastic material being kept between 180 and 3S0 degree Celsius.
5. The method as defined in Claim 1, wherein said micro-holes are distributed at least one micro-hole per square millimeter.
6. A structure of binding plastic and metal material together comprising:
a metal substrate having at least one selected surface area, many micro-holes being formed on said selected surface area; said micro-holes being defined as having an hole diameter ranging from 0.05 mm to O.S mm and having a hole depth substantially equal or smaller than a half of a thickness of said metal substrate; each micro-hole having a rough inner surface; and
a solidified plastic material being engaging with said rough inner surfaces of said micro-holes of said metal substrate.
7. The structure as defined in Claim 6, wherein each micro-hole has a hole axis which is substantially perpendicular to said selected surface area; and said rough inner surface of each micro-hole includes at least one protruding portion and at least one recessed portion so that said solidified plastic material filled in said micro-holes are firmly bonded on said metal substrate.
8. The structure as defined in Claim 6, wherein said selected surface area of the metal substrate being decorated and finished by a refined layer; said refined layer being a protective film or a coating layer.
9. The structure as defined in Claim 6, wherein said micro-holes are distributed at least one micro-hole per square millimeter.
PCT/US2011/061340 2010-11-23 2011-11-18 Method and structure of binding plastic and metal material together WO2012071259A1 (en)

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US41639010P 2010-11-23 2010-11-23
US61/416,390 2010-11-23

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103950147A (en) * 2014-04-30 2014-07-30 东莞劲胜精密组件股份有限公司 Metal wetting agent and preparation method of composite material
EP2743053A3 (en) * 2012-12-11 2015-07-22 Robert Bosch Gmbh Compound material and its use
JP2016203643A (en) * 2016-08-26 2016-12-08 ダイセルポリマー株式会社 Method for producing composite molded body
JP2019018501A (en) * 2017-07-20 2019-02-07 ポリプラスチックス株式会社 Metal resin composite molded article and production method thereof
EP3666492A1 (en) * 2018-12-14 2020-06-17 BSH Hausgeräte GmbH Method for manufacturing a front panel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6610960B2 (en) * 2001-05-23 2003-08-26 Siemens Aktiengesellschaft Method for drilling micro-holes with a laser beam
US20070173187A1 (en) * 2001-02-08 2007-07-26 Inha Park Chemical mechanical polishing pad with micro-holes
US20080070001A1 (en) * 2006-09-19 2008-03-20 Harri Lasarov Plastic-acceptor hybrid components
US20090035589A1 (en) * 2007-08-01 2009-02-05 Kun-Neng Lee Fabricating method of heterogeneous integration of aluminum alloy element and plastic element and heterogeneous integrated structure of aluminum alloy and plastic

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070173187A1 (en) * 2001-02-08 2007-07-26 Inha Park Chemical mechanical polishing pad with micro-holes
US6610960B2 (en) * 2001-05-23 2003-08-26 Siemens Aktiengesellschaft Method for drilling micro-holes with a laser beam
US20080070001A1 (en) * 2006-09-19 2008-03-20 Harri Lasarov Plastic-acceptor hybrid components
US20090035589A1 (en) * 2007-08-01 2009-02-05 Kun-Neng Lee Fabricating method of heterogeneous integration of aluminum alloy element and plastic element and heterogeneous integrated structure of aluminum alloy and plastic

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2743053A3 (en) * 2012-12-11 2015-07-22 Robert Bosch Gmbh Compound material and its use
CN103950147A (en) * 2014-04-30 2014-07-30 东莞劲胜精密组件股份有限公司 Metal wetting agent and preparation method of composite material
JP2016203643A (en) * 2016-08-26 2016-12-08 ダイセルポリマー株式会社 Method for producing composite molded body
JP2019018501A (en) * 2017-07-20 2019-02-07 ポリプラスチックス株式会社 Metal resin composite molded article and production method thereof
EP3666492A1 (en) * 2018-12-14 2020-06-17 BSH Hausgeräte GmbH Method for manufacturing a front panel

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