CN102310566A - Forming method for combining metal with plastic - Google Patents
Forming method for combining metal with plastic Download PDFInfo
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- CN102310566A CN102310566A CN2010102247867A CN201010224786A CN102310566A CN 102310566 A CN102310566 A CN 102310566A CN 2010102247867 A CN2010102247867 A CN 2010102247867A CN 201010224786 A CN201010224786 A CN 201010224786A CN 102310566 A CN102310566 A CN 102310566A
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Abstract
The invention relates to a forming method for combining metal with plastic. The forming method comprises the following steps of: coating an attaching medium to the surface of a metal piece; arranging the metal piece in a die; and injecting the plastic into the die to enable the plastic to form a plastic piece and using the attaching medium to be combined with the metal piece, wherein the temperature of the injected plastic is higher than a melting point of the attaching medium. According to the forming method disclosed by the invention, the plastic piece can be smoothly combined with the metal piece and better combining strength is obtained.
Description
Technical field
The relevant a kind of plastics injection forming method of the present invention, and be particularly to a kind of forming method that combines metal and plastics.
Background technology
Plastic product forming is easy, cheap, and the accuracy of manufacture is easy to reach requirement again, and therefore the finished product with plastics ejection formation manufactured has been widely used on the industries such as electronics, communication, machinery.With technology now; There is increasing working of plastics to combine with metalwork; For example the back of the body of laptop computer covers and need locate other parts securely; Possess simultaneously the high mechanical property of hardness again, in this case with metal with integrally moulded be most economical and the timesaving manufacture, this manufacture also can reach the effect of high bonding strength.
Yet present operating type is, the dealer pastes one usually in advance and sticks together adhesive tape on the metalwork surface, with as the medium between metalwork and plastics, and then metalwork inserted the operation of carrying out ejection formation in the mould.When carrying out the ejection formation operation, the thickness condition of different of adhesive tape per unit length on the metalwork surface appears sticking together easily, and make each local strength of plastic tie metal part different, poor effect.
Summary of the invention
The object of the present invention is to provide a kind of forming method that combines metal and plastics, make to have preferable bond strength between metal and plastics.
The present invention provides a kind of forming method that combines metal and plastics, comprises the following step: coating is sticked together medium in the metalwork surface.Metalwork is set in mould.Inject plastics to mould with moulding plastics spare, the working of plastics utilization is sticked together medium and is combined with metalwork, and wherein the operating temperature of plastics is higher than the fusing point that sticks together medium.
In preferred embodiment, mould comprises male model and master mold, the step of metalwork in mould is set comprises and cover male model and master mold.
In preferred embodiment, coating is sticked together medium and is accomplished with spray pattern in the step on metalwork surface.
In preferred embodiment, forming method provided by the present invention also is contained in coating and sticks together medium before the step on metalwork surface, with organic matter clean metal spare surface.
In preferred embodiment, after forming method provided by the present invention also is contained in the step with organic matter clean metal spare surface, improve the surface ability on metalwork surface with inorganic matter.Wherein, accomplish via the Surface Treatment with Plasma mode with the step of the surperficial surface ability of inorganic matter raising metalwork.
In preferred embodiment, metalwork is one of them or its combination of aluminium, almag.
In preferred embodiment, the fusing point that sticks together medium is lower than 100 ℃, and its material is one of them or its combination of plastics, rubber, resin.
In preferred embodiment, the bond strength of sticking together medium and metalwork surface is more than or equal to 4.5MPa.
Description of drawings
Fig. 1 is provided with the sketch map of metalwork for adopting forming method of the present invention on master mold;
Fig. 2 is for adopting forming method of the present invention that male model is superimposed on master mold and form the sketch map of die cavity;
Fig. 3 injects the sketch map in the die cavity for adopting forming method of the present invention with liquid plastic;
Fig. 4 solidifies metalwork and liquid plastic in the sketch map of the finished product that combines for adopting forming method of the present invention;
Fig. 5 is the sketch map of another finished product of adopting forming method of the present invention and making; And
Fig. 6 is the block diagram of forming method of the present invention.
The specific embodiment
The present invention is a kind of forming method that combines metal and plastics, and it makes working of plastics combine metalwork smoothly and has preferable bond strength.
In preferred embodiment, this forming method is applied to make the surface structure spare and the inner structural members of notebook computer, but the present invention does not desire as limit.In addition, the material of metalwork can be aluminium, almag one of them or its combination.
Like Fig. 1～shown in Figure 3; Employed mould in the forming method of combination metal of the present invention and plastics; It comprises master mold 100, male model 200, and metalwork 300 among the figure (shown here is the outward appearance sheet metal of electronic product, but does not desire as limit) is set on the master mold.Master mold 100 and male model 200 shapes symmetry, in the present embodiment, master mold 100 and male model 200 shapes are preferably rectangle.Yet in other various embodiment, can be circle or other particular geometric shapes.Master mold 100 has a plurality of runners 110 that water, and the liquid plastic (figure does not show) that supplies to penetrate gets in the mould.In addition, in other various embodiment, can comprise caster and male model plate (figure does not show) in addition, respectively in abutting connection with being arranged at master mold 100 and male model 200 1 sides, with location master mold 100 and male model 200.
In the present embodiment, after metalwork 300 several operation/operations of preferable prior process of desiring to combine, begin to such an extent that be arranged in the mould with plastics.For example: with the impurity on similar acetone of organic matter or relevant chemical substance removal/clean metal spare 300 surfaces.Again the surface inorganic thing is removed, for example: with modes such as plasma improve metalwork 300 the surface can, and confirm that with the dyne ratio metalwork surface after cleaning can surpass 70 dyne, high surface energy can increase the bond strength of sticking together medium and metalwork.
Then, evenly coating is sticked together medium 150 on metalwork 300 surfaces.At last, just will be placed in the mould, carry out the operation of ejection formation according to the metalwork 300 that the above-mentioned steps manufacturing is accomplished.In principle, stick together medium 150 coating scopes preferably on the surface for the metalwork 300 that combines with plastics; Yet in other various embodiment, also can coat on the surface of whole metalwork 300, look closely demand and change.
In like Fig. 1 and embodiment shown in Figure 2, metalwork 300 preferable being located on the master mold 100 make master mold 100 move to relative male model 200 1 sides, so that carry out relevant operations such as matched moulds.Yet in other various embodiment, male model 200 also can initiatively move to master mold 100 1 side positions, looks closely demand and changes.When master mold 100 and male model 200 cover each other, can form die cavity 250.At this moment, the compressing that metalwork 300 is understood owing to feature die 100,200, and be embedded in the die cavity 250.The shape of die cavity 250 and structure are looked required finished size/shape and are decided, and not delimit the scope of the invention.
As shown in Figure 3, inject liquid plastic 400 and make it be full of whole die cavity 250 from watering runner 110.In the present embodiment, the operating temperature of liquid plastic 400 is preferably and is higher than the fusing point that sticks together medium 150, makes to stick together liquid plastic 400 dissolving that dielectric surface suffers high temperature, and then makes liquid plastic and stick together medium and combine.
Then, please be simultaneously with reference to shown in Figure 4, after liquid plastic 400 solidified, the working of plastics of moulding can be incorporated on metalwork 300 surfaces through sticking together medium 150.Referring to Fig. 5, it makes the enforcement illustration of the backboard of notebook computer for adopting the present invention.In the present embodiment, metalwork 300 is preferable to account for the bigger area of backboard 500, and plastics 400 promptly the demand of looking take shape on backboard 500 1 sides, promptly the periphery of metalwork 300 supplies and other spare part (figure does not show) assembling.Sticking together medium 150 preferably coats between metalwork 300 and the liquid plastic 400.In addition, in embodiment as shown in Figure 5,, can also adopt for example fixation kit such as screw, rivet 450 if desire increases the bond strength of 300 of plastics and metalworks.
Sum up said method, Fig. 6 shows the forming method of combination metal provided by the present invention and plastics, comprises the following step: step 510, coating (coating) are sticked together medium in the metalwork surface.Step 520 is provided with metalwork in mould.Step 530 is injected plastics to mould.Step 540, making plastic shaping is working of plastics, and makes the working of plastics utilization stick together medium to combine with metalwork, wherein the operating temperature of liquid plastic is higher than the fusing point that sticks together medium.So-called operating temperature refers to that plastics are in the temperature of the liquid aspect that can supply operate.
Particularly, in embodiment as shown in Figure 6, like step 510, the method that medium is sticked together in coating can be will stick together medium with (spreading) mode of spraying to coat on the metalwork surface, so also can make to stick together being formed on the metalwork of homogeneous media.At this moment, it is preferable more than or equal to 4.5MPa to stick together the bond strength (adhesion strength) of medium.In step 520, the step that metalwork is arranged in the mould comprises the storing metalwork in being covered in the mould that forms die cavity by male model and master mold.When male model and master mold closure, metalwork will be embedded in the die cavity.In addition, before step 510, that is metalwork also comprises the surface with organic matter clean metal spare before medium is sticked together in coating.Said organic matter for example comprises: chemical substances such as acetone, toluene, methyl alcohol, carbon tetrachloride.After removing the impurity on metalwork surface, other comprises the surface ability that improves metalwork with inorganic matter.In other words, the step that improves metalwork surface ability improves preferable comprising with plasma (Plasma) mode.
In preferred embodiment, the fusing point that sticks together medium is lower than 100 ℃, and its material comprises plastics, rubber, resin one of them or its combination.In other words, liquid plastic then is the mixed solution that operating temperature is formed at the various plastics more than 100 ℃.In addition, metalwork is preferable comprises aluminium, almag one of them or its combination.
The present invention obtains explanation by above-mentioned related embodiment, yet the foregoing description is merely the example of embodiment of the present invention.It must be noted that disclosed embodiment does not limit scope of patent protection of the present invention.Modification of making according to spirit of the present invention and principle and equalization are provided with and all are contained in the claim scope of the present invention.
Claims (9)
1. a forming method that combines metal and plastics is characterized in that, comprises following steps:
Coating is sticked together medium in the metalwork surface;
Above-mentioned metalwork is set in mould; And
Inject plastics to above-mentioned mould with moulding plastics spare, above-mentioned working of plastics utilizes the above-mentioned medium that sticks together to combine with above-mentioned metalwork;
Wherein the operating temperature of above-mentioned plastics is higher than the above-mentioned fusing point that sticks together medium.
2. forming method according to claim 1 is characterized in that above-mentioned mould comprises male model and master mold, and is provided with in the step of above-mentioned metalwork in above-mentioned mould in above-mentioned, and above-mentioned forming method also comprises:
Cover above-mentioned male model and above-mentioned master mold.
3. forming method according to claim 1 is characterized in that, the above-mentioned medium that sticks together of above-mentioned coating is accomplished with spray pattern in the step on above-mentioned metalwork surface.
4. forming method according to claim 1 is characterized in that, before the step on above-mentioned metalwork surface, above-mentioned forming method also comprises in the above-mentioned medium that sticks together of above-mentioned coating:
Clean above-mentioned metalwork surface with organic matter.
5. forming method according to claim 4 is characterized in that, after the above-mentioned step that cleans above-mentioned metalwork surface with above-mentioned organic matter, above-mentioned forming method also comprises:
Improve the surface ability on above-mentioned metalwork surface with inorganic matter.
6. forming method according to claim 5 is characterized in that, above-mentioned with above-mentioned inorganic matter improve above-mentioned metalwork surface the surface can step accomplish via the Surface Treatment with Plasma mode.
7. forming method according to claim 1 is characterized in that, above-mentioned metalwork is one of them or its combination of aluminium, almag.
8. forming method according to claim 1 is characterized in that, the above-mentioned fusing point that sticks together medium is lower than 100 ℃, and its material is one of them or its combination of plastics, rubber, resin.
9. forming method according to claim 1 is characterized in that, above-mentioned bond strength of sticking together medium and above-mentioned metalwork surface is more than or equal to 4.5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102247867A CN102310566A (en) | 2010-07-05 | 2010-07-05 | Forming method for combining metal with plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102247867A CN102310566A (en) | 2010-07-05 | 2010-07-05 | Forming method for combining metal with plastic |
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| Publication Number | Publication Date |
|---|---|
| CN102310566A true CN102310566A (en) | 2012-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102247867A Pending CN102310566A (en) | 2010-07-05 | 2010-07-05 | Forming method for combining metal with plastic |
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| CN (1) | CN102310566A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103142A (en) * | 1993-11-20 | 1995-05-31 | 申文清 | Once through moulding technology for brake disc assembly |
| CN1300304A (en) * | 1999-04-02 | 2001-06-20 | 巴塞尔技术有限公司 | Coupling metal parts with a plastic material |
| CN101547778A (en) * | 2007-05-09 | 2009-09-30 | 三荣联合有限公司 | Metal adhesive moulding method and the product made by the method |
-
2010
- 2010-07-05 CN CN2010102247867A patent/CN102310566A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103142A (en) * | 1993-11-20 | 1995-05-31 | 申文清 | Once through moulding technology for brake disc assembly |
| CN1300304A (en) * | 1999-04-02 | 2001-06-20 | 巴塞尔技术有限公司 | Coupling metal parts with a plastic material |
| CN101547778A (en) * | 2007-05-09 | 2009-09-30 | 三荣联合有限公司 | Metal adhesive moulding method and the product made by the method |
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Application publication date: 20120111 |