TWI515103B - A metal resin composite molding metal member, and a metal resin composite molded article - Google Patents

Description

Insert metal element for metal resin composite molding and metal resin composite molded body

The present invention relates to an insert metal element for a metal resin composite molded body, and a metal resin composite molded body including the above-described insert metal element and resin element.

A metal-resin composite molded body in which a metal element composed of a metal, an alloy, or the like and a resin element composed of a thermoplastic resin composition are integrated is conventionally used in a control box around an instrument panel. Parts such as automotive interior components, engine peripheral parts, internal parts, digital cameras, interface devices such as mobile phones, and power supply terminal parts that come into contact with the outside world.

As a method of integrating the insert metal element and the resin element, there is a method of forming fine irregularities on the joint surface of the insert metal element in advance and joining by anchoring effect; using an adhesive and a double-sided tape, followed by a method; The metal element and/or the resin element are provided with a fixing member such as a folded piece or a hook, and a method of fixing the both by using the fixing element; and a method of joining using a screw or the like. Among these, in terms of the degree of freedom in designing the metal-resin composite molded body, a method of forming minute irregularities in the insert metal element and a method using an adhesive are effective.

In particular, the method of processing the surface of the insert metal member and forming minute irregularities is advantageous without using an expensive adhesive. As a method of processing the surface of the insert metal element and forming fine unevenness, for example, the method described in Patent Document 1 can be mentioned.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2010-167475

The method described in the above Patent Document 1 is one of effective methods for forming a rough surface in a required range on the surface of the insert metal element and for facilitating the work. Further, in the method described in Patent Document 1, a rough surface is formed on the surface by laser irradiation.

However, in recent years, in the electronic devices that are in contact with the outside, such as the interface between the digital camera and the mobile phone, and the power supply terminal, the waterproof function is gradually becoming the standard. In contact with the parts, water becomes a problem from the interface between the metal and the resin. Further, in the manufacturing process, the electronic component must pass through a soldering step (reflow step), and the metal oxide film removing agent used in the process oozes to the substrate along the interface between the metal and the resin, which is a problem.

In order to solve such problems, a method of integrating the insert metal member with the resin member by forming a rough surface on the surface of the insert metal member is necessary for further adhesion between the insert metal member and the plug metal member. Resin The adhesion of the interface of the component, especially the airtightness, is an urgent task.

SUMMARY OF THE INVENTION An object of the present invention is to provide a technique for forming a rough surface on a surface of a metal member of an insert to improve airtightness at an interface between the metal member of the insert and the resin member.

The inventors of the present invention have been concentrating on the above-mentioned problems, and as a result, it has been found that at least the bonding with the resin element is predetermined among the surfaces of the metal element for the metal resin composite molded body having the function of blocking gas or liquid. A part or all of the surface forms a roughened region, wherein the roughened region is from the edge portion of the shielding side of the gas or liquid contact to the edge portion of the open side where the gas or liquid does not contact, without continuous through roughness The present invention has been accomplished by solving the above problems. More specifically, the present invention provides the following matters.

(1) An insert metal element which is a metal element for a metal-resin composite molded body having a function of blocking a gas or a liquid, the insert metal element having a roughened surface having a plurality of rough surfaces on the surface thereof, the rough The surface area is formed on at least a part or all of a predetermined surface of the bonding of the insert metal element and the resin element formed by the insert on the insert metal element, and the roughening area is from the gas or The edge portion on the blocking side of the liquid contact is from the edge portion on the open side where the gas or liquid does not contact, and does not have a rough surface that continuously penetrates.

(2) The insert metal element for a metal resin composite molded body according to (1), wherein the plurality of rough surfaces are formed by laser irradiation.

(3) The insert metal element for a metal resin composite molded body according to (1) or (2), which is chemically treated.

(4) A metal-resin composite molded body comprising a metal element of a plug and a resin element formed by the insert on the metal element of the insert, and a metal-resin composite molded body having a function of blocking gas or liquid, wherein the insert The metal element has a roughened surface having a plurality of rough surfaces on the surface thereof, and the roughened region is formed on at least a part or all of a predetermined surface of the joint of the insert metal element and the resin element, and is on the joint predetermined surface. The roughened surface region does not have a rough surface that continuously penetrates from the edge portion on the blocking side where the gas or liquid contacts the gap to the edge portion on the open side where the gas or liquid does not contact.

(5) The metal resin composite molded body according to (4), wherein the plurality of rough surfaces are formed by laser irradiation.

(6) The metal resin composite molded body according to (4) or (5), wherein the above-mentioned insert metal member is chemically treated.

(7) The metal-resin composite molded body according to (6), wherein an area of the roughened surface per 1 mm ² of the roughened region in the roughened region is 0.15 mm ² or more.

(8) The metal-resin composite molded body according to (4) or (5), wherein, in the roughened region, the roughened surface has an area of 0.2 mm ² or more per 1 mm ² of the rough surface.

The metal-resin composite molded article according to any one of the aspects of the present invention, wherein the depth of the unevenness formed by the rough surface in the roughened region is 100 μm or less.

The metal-resin composite molded body according to any one of the above-mentioned aspects of the above-mentioned roughening region, from the edge portion of the above-mentioned roughening region to the upper side The distance from the edge portion on the open side is 1.5 mm or less.

When the insert metal element of the present invention is integrated with a resin component, the airtightness at the interface with the resin component is extremely high.

1‧‧‧plug metal components

2‧‧‧ holes

3‧‧‧Rough surface area

4‧‧‧The outer perimeter of the joint surface

5‧‧‧Metal resin composite molded body

6‧‧‧Resin components

7‧‧‧Airtight testing machine

8‧‧‧Airtight testing machine body

9‧‧‧Airtight test cover

10‧‧‧O-ring

11‧‧‧ distilled water

12‧‧‧ pipeline

13‧‧‧Inside the airtight tester body

d‧‧‧Process width

Fig. 1 is a view schematically showing an embodiment of the insert metal element of the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a cross-sectional view showing a cross section taken along line AA. Further, the unit of size in the figure is mm (the same applies hereinafter).

Fig. 2 is a plan view showing a pattern of a rough surface in the roughened region 3.

Fig. 3 is a view showing a specific example of a method of irradiating a metal surface with a laser.

Fig. 4 is a perspective view schematically showing another embodiment of the insert metal member of the present invention.

Fig. 5 is a view schematically showing an embodiment of the metal-resin composite molded body of the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a cross-sectional view showing a BB cross section.

Fig. 6 is a longitudinal sectional view showing a method of evaluating the airtightness using the airtightness tester 7.

Hereinafter, embodiments of the present invention will be described. Further, the present invention is not limited by the following embodiments.

<plug metal component>

The insert metal component of the present invention has a plurality of rough surfaces on its surface Roughened area.

First, the insert metal member before the rough surface is formed will be described. Examples of the metal material constituting the metal element of the insert include aluminum, magnesium, stainless steel, copper, and the like. Further, the insert metal member can also be composed of a metal alloy. Further, surface treatment and coating such as anodizing treatment may be performed on the surface of the metal material.

In the present invention, a plug metal member having a desired shape is formed in accordance with the use or the like. For example, by inserting a molten metal or the like into a mold of a desired shape, a desired shape insert metal element can be obtained. Further, in order to form the insert metal member into a desired shape, cutting work by a work machine or the like may be used.

An embodiment of the insert metal element of the present invention will be described with reference to Fig. 1 . Fig. 1 is a view schematically showing an embodiment of the insert metal element of the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a cross-sectional view showing a cross section taken along line AA.

As shown in Fig. 1, the insert metal element 1 of the present embodiment has a disk shape having a diameter of 50 mm and a thickness of 1 mm, and has a hole 2 having a diameter of 20 mm concentrically in the center portion. The insert metal element 1 is provided on the plane around the hole 2, and has a roughened surface 3 which has a processing width d (that is, a distance from the edge portion on the blocking side to the edge portion on the open side which will be described later). The roughened area 3 has a plurality of rough faces. From the viewpoint of design, etc., the processing width d is preferably as small as possible. In the present invention, since the airtightness at the interface between the metal element of the insert and the resin element is improved, for example, it can be set to 2 mm or less, preferably 1.5. Below mm, more preferably 1 mm or less. In the plug metal component 1, the plug metal component 1 is inserted The joining predetermined surface of the resin member formed on the insert metal member 1 is a region surrounded by the circumference of the hole 2 and the outer periphery 4 of the joint predetermined surface on the plane of the insert metal member 1, and the circumferential surface of the hole 2. Composition. The outer periphery 4 of the joint predetermined surface is formed concentrically with the insert metal element 1 and has a diameter of 30 mm. As shown in Fig. 1, the roughened region 3 is formed on a part of the joint preparation surface.

One of the inner peripheral edge and the outer peripheral edge of the roughened region 3 is an edge portion on the blocking side where the gas or liquid contacts, and the other is an edge portion on the open side where the gas or liquid does not contact. Which of the inner peripheral edge and the outer peripheral edge of the roughened region 3 is the edge portion on the blocking side or the edge portion on the open side depends on the method of using the metal-resin composite molded body obtained from the insert metal element 1. In this regard, the metal-resin composite molded body 5 shown in FIG. 5 which will be described later will be specifically described as an example. When the metal-resin composite molded body 5 is used so that the gas or the liquid does not enter the inside from the outside, the outer peripheral edge of the roughened region 3 serves as the edge portion on the blocking side, and the inner peripheral edge of the roughened region 3 becomes The edge of the open side. At this time, the direction of leakage of the gas or liquid that must be blocked is the direction from the outside toward the inside. On the other hand, when the metal-resin composite molded body 5 is used to prevent the gas or the liquid from being discharged outward from the inside, the inner peripheral edge of the roughened region 3 is the edge portion on the blocking side, and the roughened region 3 is formed. The outer periphery is the edge portion on the open side. At this time, the direction of leakage of the gas or liquid that must be blocked is the direction from the inside toward the outside.

The pattern of the rough surface of the roughened region 3 is not particularly limited as long as it does not have a rough surface that continuously penetrates between the inner peripheral edge and the outer peripheral edge of the roughened region 3. Fig. 2 is a plan view showing a pattern of a rough surface in the roughened region 3. In Fig. 2, on the plane of the insert metal component 1, The curve existing in the region surrounded by the circumference of the hole 2 and the outer periphery 4 of the joint predetermined surface shows a rough surface. For example, as shown in Fig. 2(a), a pattern composed of a plurality of rough surfaces arranged in a circular shape is exemplified. Here, the plurality of rough surface systems may be arranged concentrically, or may have some or all of them having different centers. Also, the rough surfaces can be crossed. Moreover, the rough surface may not be circular, for example, it may be elliptical or may be composed of a wavy curve. Moreover, the rough surface may also be formed by a slippery curve, for example, it may be formed in a polygonal shape. As shown in Fig. 2(b), a part of the rough surface which is arranged in a circular shape in Fig. 2(a) may be interrupted. As shown in Fig. 2(c), the rough surface may be spiral. Moreover, in order to show the pattern of a rough surface easily, in FIG. 2, the process width d of the roughened area 3 is set larger than the 1st figure.

In either of Figs. 2(a) to (c), since the rough surface continuously penetrated between the inner peripheral edge and the outer peripheral edge of the roughened surface region 3, the insert metal member and the resin are not present. When the components are integrated, the gas or liquid system does not easily leak through the rough surface, and the airtightness at the interface between the metal element of the insert and the resin element can be effectively improved.

In the present invention, the method of forming a rough surface on the metal surface is not particularly limited, and a general roughening method can be used, and for example, laser treatment and chemical etching can be mentioned. Since the rough surface can be easily formed in a desired range, and the work is simple and efficient, the rough surface is preferably formed by laser irradiation. In the laser processing, specifically, the rough surface processing is performed by subjecting the metal surface to trenching, melting, and resolidifying using an irradiation laser. In chemical etching, the desired range is roughened by using shading or the like. To form a rough surface pattern.

The plurality of rough faces in the roughened region may be arranged in parallel or may not be arranged in parallel. The distance between the centers of the rough surfaces in the direction in which the rough surfaces are arranged is the interval between the adjacent rough surfaces. In the present specification, the interval between the adjacent rough surfaces is referred to as the "hatched width". In the present invention, it is preferable to adjust the hatching width to 250 μm or less. When the hatching width is 250 μm or less, the adhesion between the metal part and the resin part is easily improved. It is preferable that the range of the hatching width is 50 μm or more and 250 μm or less. When the hatch width is not constant (for example, when the plurality of rough faces are not arranged in parallel), it is preferable that at least a part of the hatch width is the above range. When the hatching width is in the above range, the adhesion between the insert metal element and the resin element in the portion having the hatching width of 250 μm or less is improved, and the adhesion between the entire insert metal element and the resin element is improved. However, in order to make the above-mentioned adhesiveness extremely excellent, it is preferable to adjust so that the maximum value of the above-mentioned hatching width becomes 250 μm or less.

Further, the roughened surface area per 1mm ² of the rough surface area, preferably based at least 0.2mm ² to 0.3mm ² or more is preferred. When the roughened surface has an area of 0.2 mm ² or more per 1 mm ² of the rough surface, the physical adhesion (anchor) effect is easily obtained between the metal element and the resin element formed by the insert, so that the airtightness is easily improved. In particular, as will be described later, when the insert metal element 1 is chemically treated, the area of the roughened surface per 1 mm ² of the roughened region is preferably 0.15 mm ² or more. Further, when a rough surface is formed by laser irradiation, the product of the total length of the laser beam formed by the irradiation and the spot diameter of the laser light is set as the area of the rough surface.

The number of rough surfaces is not particularly limited as long as it is plural. When the number of rough faces is 3 or more, it is preferably the hatching width of any adjacent rough faces. At least a portion thereof is 250 μm or less.

Also, the plurality of rough surfaces may also intersect.

When the rough surface is formed, the depth of the unevenness forming the rough surface is preferably 100 μm or less, and the depth of the unevenness forming the rough surface is preferably 5 to 100 μm. When the depth of the concavities and convexities is 100 μm or less, since the processing time for forming the rough surface does not become too long, it is preferable from the viewpoint of production. The method of adjusting the depth of the concavities and convexities to 100 μm or less includes repeating the irradiation of the laser light twice or three times (adjusting the number of scans) at a position after the irradiation of the laser light, adjusting the spot diameter of the laser light, and adjusting the output of the laser light. Power; adjusting the frequency of the laser light; adjusting the scanning speed of the laser light; performing multiple chemical etchings at the same position; and adjusting the composition of the etching liquid and the etching time method. The specific conditions are different depending on the type of the metal material constituting the insert metal element, etc., and therefore preferable conditions are appropriately employed in accordance with the type of the metal material and the like.

The depth of the unevenness is a value measured using a laser microscope. Further, when the rough surfaces are crossed, deeper irregularities are formed at the intersecting portions than the portions that do not intersect. In the case of such a cross portion, the depth of the concavities and convexities is measured by the above method for the portions that do not intersect.

Hereinafter, a specific method of forming a rough surface on a metal surface will be described as an example of irradiating a laser beam with a pulse wave. As described in Fig. 3(a), the laser light is irradiated onto the metal surface. A rough surface is formed in the portion irradiated by the laser. Further, the hollow arrow in Fig. 3 indicates the scanning direction of the laser.

Further, in Fig. 3(a), a method of irradiating a laser formed so as to be arranged in a rough surface is shown. In the irradiation method described in Fig. 3(a), the two rough surfaces are arranged substantially in parallel. In Fig. 3(a), the distance between the centers of the pulses in the direction in which the rough faces are arranged is the hatching width. In the case shown in Fig. 3(a), it is preferable to adjust the hatching width to be constant and the hatching width to be 250 μm or less. Preferably, the range of the hatching width is 50 μm or more and 250 μm or less. Further, the area of the rough surface formed by laser irradiation per 1 mm ² of the roughened region is preferably 0.2 mm ² or more, and more preferably 0.3 mm ² or more.

Further, as shown in Fig. 3(b), the laser may not be irradiated substantially in parallel. As shown in Fig. 3(b), although the hatching width is not constant, it is preferable that at least a part of the hatching width is 250 μm or less. In the case where the hatching width is in the above range, the adhesion between the insert metal element and the resin element in the portion having the hatching width of 250 μm or less is improved, and the adhesion between the entire insert metal element and the resin element is improved. However, in order to make the above-mentioned adhesiveness very excellent, it is preferable to adjust so that the maximum value of the above-mentioned hatching width is 250 μm or less.

Further, as shown in Fig. 3(c), the laser light may not be irradiated linearly. In this case, as in the case of FIG. 3(b), the hatching width is not constant, and it is preferable that at least a part of the hatching width is 250 μm or less, and it is preferable that the maximum value of the hatching width is 250 μm or less. The situation is the same as in the case of Fig. 3(b).

Further, Fig. 3(d) shows a case where the plurality of rough surfaces are intersected.

The spot diameter of the laser light (as shown in Fig. 3, when the irradiation range of the laser light is a circle, the diameter of the circle showing the irradiation range) is 200 μm or less. Good, preferably 30~130μm.

The insert metal component 1 can also be chemically treated. By chemical treatment, a chemical bonding effect of a covalent bond, a hydrogen bond, or an intermolecular force can be imparted between the insert metal element 1 and the resin element formed by the insert, and the metal element 1 and the resin element are interposed. The airtightness of the interface is easy to increase. Moreover, it is possible to maintain the same airtightness even when the chemical processing is not performed, even if the processing area of the rough surface is small. Examples of the chemical treatment include dry treatment such as corona discharge, and the like. The treatment (see JP-A-2000-218935), chemical etching (JP-A-2001-225352), and the like. In addition, when the metal material constituting the insert metal element 1 is aluminum, warm water treatment (Japanese Laid-Open Patent Publication No. Hei 8-142110) is also known. The warm water treatment may be immersed in water at 100 ° C for 3 to 5 minutes. It can also be carried out by combining a plurality of chemical treatments.

As described above, in the first embodiment, the disk-shaped insert metal element is shown, but the shape of the insert metal element of the present invention is not limited by the disk shape. As another embodiment of the insert metal element of the present invention, for example, the one shown in Fig. 4 can be cited. Fig. 4 is a perspective view schematically showing another embodiment of the insert metal member of the present invention. In Fig. 4, the line drawn on the side of the square column or cylinder shows a rough surface. Figure 4 (a) shows a square columnar insert metal component. The rough surface may be formed on all four sides, or may be formed only on a part of the side surface. The rough surface may be continuous between a side surface and a side surface adjacent thereto, and may be discontinuous as shown in Fig. 4(a). Figure 4(b) shows a cylindrical insert metal component. In Fig. 4(b), the rough surface is interrupted in the same manner as in Fig. 2(b). Figure 4(c) shows an additional cylindrical insert metal component. In Fig. 4(c), the rough surface is spiral like the second figure (c). The insert metal element shown in Fig. 4(a) can be used, for example, as a square terminal. Further, the insert metal element shown in FIGS. 4(b) and 4(c) can be used, for example, as a round terminal.

In Figs. 4(a) to 4(c), the edge portion of the roughened region exists at two places in the longitudinal direction of the square column or the cylinder. When the gas or liquid system that must be interrupted is in contact with one end side of the square column or the longitudinal direction of the cylinder (that is, when the leakage direction of the gas or liquid that must be interrupted is the length direction of the square column or the cylinder), the roughened area One of the edge portions is an edge portion on the blocking side, and the other is an edge portion on the open side, because there is no rough surface that continuously penetrates between the edge portions of the two portions. When these insert metal elements are integrated with the resin element, gas or liquid leakage does not easily occur through the rough surface, so that the airtightness at the interface between the insert metal element and the resin element can be effectively improved.

<Metal resin composite molded body>

As described above, the metal-resin composite molding system of the present invention has a gas or liquid blocking function, and includes an insert metal element and a resin element which is formed by the insert on the insert metal element. Since the unevenness formed on the surface of the insert metal element is formed so as not to be a path of gas or liquid, the metal resin composite molding system of the present invention has high airtightness at the interface between the insert metal element and the resin element.

First, the resin element will be briefly described. The material constituting the resin element is not particularly limited, and a conventional thermoplastic composition containing a thermoplastic resin can be used. Further, the thermoplastic resin composition also contains only a trace amount of impurities other than the thermoplastic resin, and the like. The case of a thermoplastic resin.

Examples of the thermoplastic resin include polyethylene (PE), polypropylene (PP), polystyrene (PS), acrylonitrile/styrene resin (AS), and acrylonitrile/butadiene/styrene resin. ABS), methacrylic resin (PMMA), vinyl chloride (PVC); as a thermoplastic resin (general engineering resin), for example, polyamine (PA), polyacetal (POM), ultrahigh molecular weight Polyethylene (UHPE), polybutylene terephthalate (PBT), GF-reinforced polyethylene terephthalate (GF-PET), polymethylpentene (TPX), polycarbonate (PC), modification Polyphenylene ether (PPE); as the thermoplastic resin (super engineering resin), for example, polyphenylene sulfide (PPS), polyetheretherketone (PEEK), liquid crystalline resin (LCP), Polytetrafluoroethylene (PTFE), polyether phthalimide (PEI), polyarylate (PAR), polyfluorene (PSF), polyether oxime (PES), polyamidoximine (PAI); Examples of the thermosetting resin include a phenol resin, a urea resin, a melamine resin, an unsaturated polyester, an alkyd resin, an epoxy resin, and diallyl phthalate; as the elastomer, for example, Thermoplastic elastomer and rubber, for example, styrene. Butadiene-based, polyolefin-based, urethane-based, polyester-based, polyamidiamine-based, 1,2-polybutadiene, polyvinyl chloride-based, and ionic polymers. Further, a glass fiber or a polymer alloy may be added to the thermoplastic resin.

Further, in order to impart desired physical properties, various inorganic substances conventionally known as the glass fiber may be contained in a range that does not impair the effects of the present invention. Additives such as organic fillers, flame retardants, ultraviolet absorbers, heat stabilizers, light stabilizers, colorants, carbon black, mold release agents, plasticizers, and the like.

Among the thermoplastic resin compositions, in order to obtain a better density Preferably, the melting point of the thermoplastic resin + 20 ° C or higher and the melting point of the thermoplastic resin + 50 ° C or lower, particularly the melting point of the thermoplastic resin + 20 ° C or higher and the melting point of the thermoplastic resin + 30 ° C are preferably used. The following temperature is measured at a shear rate of 1000/sec. The melt viscosity is 500 Pa. The following thermoplastic resin composition. The thermoplastic resin composition may contain a conventionally known filler and/or additive in addition to the thermoplastic resin.

In the above case, polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), polyetheretherketone (PEEK), liquid crystalline resin (LCP), etc. are preferred thermoplastic resins, especially capable of Polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), and liquid crystalline resin (LCP) are suitably used.

An embodiment of the metal-resin composite molded body of the present invention will be described with reference to Fig. 5 . Fig. 5 is a view schematically showing an embodiment of the metal-resin composite molded body of the present invention, wherein (a) is a plan view, (b) is a front view, and (c) is a cross-sectional view showing a BB cross section.

As shown in Fig. 5, the metal-resin composite molded body 5 of the present embodiment includes an insert metal element 1 and a resin element 6 which is insert-molded onto the insert metal element 1. The insert metal element 1 is as described above. The resin element 6 is composed of a disk-shaped upper portion having a diameter of 30 mm and a thickness of 2 mm, and a disk-shaped lower portion having a diameter of 20 mm and a thickness of 1 mm, and the lower portion fills the hole 2 in the insert metal element 1. In the metal-resin composite molded body 5, the joint surface of the insert metal member 1 and the resin member 6 is a region surrounded by the circumference of the hole 2 in the plane of the insert metal member 1 and the outer periphery of the resin member 6, and the hole 2 The composition of the sun. The outer periphery of the resin element 6 on the plane of the insert metal element 1 corresponds to the outer periphery 4 of the joint predetermined surface of Fig. 1. As shown in Figure 5, the roughened area 3 It is formed on a part of the joint surface.

In the metal-resin composite molded body 5, since a part of the joint surface of the insert metal element 1 and the resin element 6 is formed by the roughened region 3, the second drawing is employed, and as described above, gas is generated because it is not easily transmitted through the rough surface or Since the liquid leaks, the airtightness at the interface between the insert metal member 1 and the resin member 6 can be effectively improved.

As described above, since the airtightness of the interface between the insert metal element and the resin element is excellent, the metal resin composite molding system of the present invention can be suitably used for applications requiring high airtightness. For example, the metal-resin composite molded body of the present invention is suitable for being electrically contained inside as being susceptible to adverse effects due to humidity and moisture. A metal resin composite molded body such as an electronic component. In particular, it is suitable for use in areas where it is required to be waterproof at a high level, for example, as a component for electrical or electronic equipment that is invaded by moisture and humidity gas used in rivers, swimming pools, ski resorts, bathrooms, and the like. The metal-resin composite molded body of the present invention is useful as, for example, a sensor such as a tilt sensor or a fuel sensor. As the tilt sensor, it is possible to exemplify a posture control or the like for use in an in-vehicle use and a game machine controller. As the fuel sensor, a fuel amount measurement or the like can be exemplified for use in an in-vehicle use. Further, the metal-resin composite molded body of the present invention is, for example, electrically provided with a resin bobbin, a holding member, and the like. Housings for electronic machines are also useful. Here, as electrical. The casing for an electronic device can be a mobile phone, a casing for a portable imaging electronic device such as a camera, a video camera, or a digital camera; a notebook personal computer, a pocket computer, and an electronic table; Portable information or communication terminal equipment for computers, electronic organizers, PDCs, PHS, mobile phones, etc. Housing; casing for portable audio electronic equipment such as MD, cassette stereo, radio, etc.; LCD TV. A housing for a household electric appliance such as a monitor, a telephone, a facsimile machine, or a hand-held scanner.

<Method for Producing Metal Resin Composite Molded Body>

The specific steps of the method for producing the metal-resin composite molded body are not particularly limited, and the resin element and the insert metal element may be integrated by allowing the melted thermoplastic resin composition to enter the uneven surface of the rough surface.

For example, an insert metal element in which a rough surface is formed is placed in a mold for injection molding, and a thermoplastic resin composition in a molten state is injected into the mold for injection molding to produce a resin element and an insert metal element. A method of forming a metal resin composite molded body. The conditions for the injection molding are not particularly limited, and the conditions can be appropriately set in accordance with the physical properties of the thermoplastic resin composition and the like. Further, a method such as transfer molding or compression molding is also effective for forming a metal resin composite molded body in which a resin element and an insert metal element are integrated.

As another example, a resin element is produced by a usual molding method such as an injection molding method, and a metal element having a rough surface is brought into contact with the resin element at a desired bonding position, and the contact is made by a pair. The surface is supplied with heat, and the vicinity of the contact surface of the resin element is melted to produce a metal resin composite molded body in which the resin element and the insert metal element are integrated.

[Examples]

Hereinafter, the present invention will be specifically described by showing examples and comparative examples, but the present invention is not limited by the examples.

<Method for Producing Metal Resin Composite Molded Body>

In the examples and comparative examples, the metal-resin composite molded body shown in Fig. 5 was used.

As the insert metal element 1, a plate made of aluminum (A5052, thickness 1 mm) and having a rough surface as described below was used. These plate-shaped insert metal members have a roughened region 3 as shown in Fig. 5(a).

As the thermoplastic resin composition constituting the resin element 6, a polyphenylene sulfide resin composition (containing 35 mass% of glass fiber as a filler, and a melting point of the thermoplastic resin of 280 ° C and a melting point of the thermoplastic resin + 30) is used. A resin composition having a melt viscosity of 160 Pa·s measured at a cutting speed of 1000/sec, a temperature of ° C, a proprietary product of "Pot PLASTICS Co., Ltd., "Fortron (registered trademark) 1135 MF1") or a polybutylene terephthalate system. The resin composition (containing 30% by mass of glass fiber as a filler, and having a melting point of 210 ° C of a thermoplastic resin, a melting point of the thermoplastic resin + 50 ° C, and a melt viscosity of 1000 Pa per second measured at a cutting speed of 140 Pa .s resin composition, "WINRAN POLYMER (registered trademark) 303RA").

Further, the method for measuring the melting point and the melt viscosity is as follows. In addition, in Tables 1 and 2, the polyphenylene sulfide resin composition was marked as "PPS", and the polybutylene terephthalate resin composition was marked "PBT".

[melting point]

The melting point of the thermoplastic resin was measured from a room temperature at a temperature rising condition of 20 ° C / min using a differential scanning calorimeter (DSC manufactured by Perkinelmer Co., Ltd.). The thermoplastic resin contained in the polyphenylene sulfide resin composition has a melting point of 280 °C. Further, the thermoplastic resin contained in the polybutylene terephthalate resin composition had a melting point of 210 °C.

[melt viscosity]

The melt viscosity was measured using a Toyo Seiki Co., Ltd. CAPILLOGRAPHY and using a 1 mm Φ x 20 mm L/Flat die as a capillary tube at a predetermined cylinder temperature and a shear rate of 1000 / sec. Further, when the polyphenylene sulfide resin composition is used as the cylinder temperature, it is 310 ° C (corresponding to the melting point of the thermoplastic resin + 30 ° C), and when the polybutylene terephthalate resin composition is used, it is 260 ° C ( Corresponding to the melting point of the thermoplastic resin +50 ° C).

<Formation of rough surface>

Use LASER MARKER (laser marker) MD-V9900 (made by KEYENCE, laser type: YV04 laser, transmission wavelength: 1064nm, maximum rated output power: use 13W (average)), output power 90%, shadow Line width 100 μm or 200 μm, frequency 40 kHz, scanning speed 1000 mm/s, number of scans 100 times (when the depth of the unevenness is 30 μm) or 300 times (when the depth of the unevenness is 70 μm), processing width (d in the fifth figure) 1 mm Under the condition of 1.5 mm or 2 mm, a portion of the metal surface before the formation of the rough surface corresponds to the roughened region 3, and a rough surface is formed. In Examples 1 to 10, as shown in Fig. 2(a), a rough surface was formed so as to be a concentric pattern. On the other hand, in Comparative Examples 1, 3, and 4, a rough surface is formed in a cross hatch pattern in which a plurality of rough faces which are arranged substantially parallel to a predetermined direction are formed and formed The direction in which the predetermined direction is rotated by 90° is formed by intersecting a plurality of rough faces arranged in a substantially parallel manner. Further, in Comparative Example 2, a plurality of rough faces arranged in a direction substantially parallel to a predetermined direction were formed, and a rough surface was formed so as to be a single hatching pattern. Further, the spot diameter of the laser light was adjusted to 50 μm. Further, in Examples 1 to 2 and 9 and Comparative Examples 1 to 4, the total width of the hatching was adjusted so that the total length of the laser beam formed by laser irradiation per 1 mm ² of the roughened region and the laser light were obtained. The area of the rough surface defined by the product of the dot diameter is 0.5 mm ² . Further, in Examples 3 to 6 and 10, the hatching width was adjusted so that the total length of the laser beam formed by laser irradiation per 1 mm ² of the roughened region and the product of the spot diameter of the laser light were used. The defined rough surface has an area of 0.25 mm ² . Further, in the seventh and eighth embodiments, the hatching width is adjusted so that the total length of the laser beam formed by the laser irradiation per 1 mm ² of the roughened region and the product of the spot diameter of the laser light are defined. the area of the rough surface, each line and 0.13mm ² 0.17mm ^2.

In Examples 3, 5, 7, 8, and 10, the chemical treatment was performed by immersing the plug metal element 1 having the rough surface in water at 100 ° C for 3 to 5 minutes.

Further, the depth of the unevenness of the rough surface was measured using a laser microscope ("VK-9510" manufactured by KEYENCE Co., Ltd.). Moreover, in the comparative example, the depth Y of the unevenness was measured in the portion where the rough surface did not intersect. The measurement results are shown in Tables 1 and 2.

The insert metal element 1 is placed in each mold and an integration step is performed. The molding conditions are as follows. The shape of the metal-resin composite molded body 5 is as shown in Fig. 5.

[forming conditions]

(When using a polyphenylene sulfide resin composition)

Forming machine: SODICK TR-40VR (longitudinal injection molding machine)

Cylinder temperature: 310°C-320°C-310°C-290°C

Mold temperature: 150 ° C

Injection speed: 100mm/s

Pressure: 49MPa × 5 seconds

(When using a polybutylene terephthalate resin composition)

Forming machine: SODICK TR-40VR (longitudinal injection molding machine)

Cylinder temperature: 260°C-260°C-240°C-220°C

Mold temperature: 140 ° C

Injection speed: 100mm/s

Pressure: 49MPa × 10 seconds

<Evaluation of air tightness>

The following airtightness evaluation was performed about the metal-resin composite molded body 5 manufactured by the above-mentioned method.

Fig. 6 is a longitudinal sectional view showing a method of evaluating the airtightness using the airtightness tester 7. The airtightness tester 7 is provided with an airtight tester main body 8 and an airtight tester cover 9.

The metal-resin composite molded body 5 is attached to the airtight tester main body 8 through the O-ring 10, and the lower portion of the metal-resin composite molded body 5 is sealed. Subsequently, the airtight tester cover 9 is placed on the insert metal member 1 of the metal-resin composite molded body 5 and clamped. Distilled water 11 is injected into the metal-resin composite molded body 5, and the metal-resin composite molded body 5 is completely immersed in the distilled water 11. A pressure of 450 MPa was applied to the inside 13 of the airtight tester body through the pipe 12 for 6 minutes, and the presence or absence of air bubbles was visually observed to leak from the interface between the insert metal member 1 and the resin member 6. The results of the airtightness evaluated in accordance with the following evaluation criteria are shown in Tables 1 and 2.

○: When the above test was carried out three times, even if the bubble leak could not be confirmed once, The evaluation was good in airtightness.

X: The above test was carried out three times, and when it was confirmed that the bubble leaked once or more, it was evaluated that the airtightness was poor.

As shown in Tables 1 and 2, when the pattern of the rough surface was a concentric pattern, not only the processing width was 2 mm, but also the airtightness was good at a processing width of 1.5 mm. Moreover, when the pattern of the rough surface is a single hatch pattern and a cross hatch pattern, the above-described situation is improved even if the same rough surface is processed, and the airtightness is further improved, and the processing time is also short. Moreover, when the insert metal element 1 is chemically treated as compared with the case where the chemical treatment is not performed, the airtightness is further improved (comparison of the third embodiment with the fourth embodiment or the comparison between the fifth embodiment and the sixth embodiment) Moreover, even a small rough surface processing area shows good airtightness (comparison of the first embodiment with the third embodiment, the comparison between the first embodiment and the eighth embodiment, the comparison between the second embodiment and the fifth embodiment, or It is a comparison between Example 9 and Example 10. Further, in the case where the insert metal element 1 is chemically treated, the air-tightness is better when the laser-processed area per 1 mm ² of the roughened region is 0.15 mm ² or more (comparison between Example 7 and Example 8) .

1‧‧‧plug metal components

2‧‧‧ holes

3‧‧‧Rough surface area

4‧‧‧The outer perimeter of the joint surface

d‧‧‧Process width

Claims (12)

An insert metal member having a metal element for a metal-resin composite molded body having a function of blocking a gas or a liquid, wherein the insert metal member has a roughened surface having a plurality of rough surfaces on a surface thereof, and the roughened surface region Forming at least a part or all of a predetermined surface of the bonding of the insert metal element and the resin element formed by the insert on the insert metal element, wherein the roughened area is covered by the gas or liquid contact The edge portion on the broken side is from the edge portion on the open side where the gas or liquid does not contact, and does not have a rough surface that continuously penetrates. The insert metal element for a metal resin composite molded body according to claim 1, wherein the plurality of rough surfaces are formed by laser irradiation. The insert metal element for a metal resin composite molded body according to claim 1 or 2, which is chemically treated. A metal-resin composite molded body comprising an insert metal element and a resin element formed by the insert on the insert metal element, and a metal-resin composite molded body having a function of blocking gas or liquid, the plug-in metal element a roughened surface having a plurality of roughened surfaces formed on at least a part or all of a predetermined surface of the joint between the insert metal element and the resin element, and the roughened surface on the joint predetermined surface The region is from the edge portion of the interruption side of the gas or liquid contact to the opening of the gas or liquid. The edge portion of the side is not provided with a continuous rough surface. The metal resin composite molded body according to claim 4, wherein the plurality of rough surfaces are formed by laser irradiation. The metal resin composite molded body according to claim 4, wherein the insert metal member is chemically treated. The application of the metal-resin Item 6 patentable scope of the molded composite, wherein the roughened surface region, the surface roughening of the roughened surface area per 1mm ² of the area of 0.15mm ² or more. The metal-resin composite molded body according to claim 4, wherein in the roughened region, the roughened surface has an area of 0.2 mm ² or more per 1 mm ² of the rough surface. The metal-resin composite molded body according to the fourth aspect of the invention, wherein the depth of the unevenness formed by the rough surface in the roughened region is 100 μm or less. The metal-resin composite molded body according to the fourth aspect of the invention, wherein the distance from the edge portion on the blocking side of the roughened region to the edge portion on the open side is 1.5 mm or less. The insert metal element for a metal-resin composite molded body according to claim 1 or 2, wherein the plurality of rough surfaces are arranged concentrically. The metal-resin composite molded body according to claim 4, wherein the plurality of rough surfaces are arranged concentrically.