JPH1142709A - Manufacture of resin-molded item having inner member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture an item with a member being housed and fixed in a main body simply and correctly by disposing the peripheral part of an inner member at the joint parts of both main body members, welding the main bodies mutually, and implementing the securement of the inner members with flashes of the main body members generated at this instance. SOLUTION: Welding surfaces 41, 42 are formed respectively at a part where a thermoplastic resin main body upper member 31 and lower member 32 are joined to each other, and the welding surface 42 of the lower member 32 is formed as an upper surface of the projected part. In addition, ribs 43 are provided on the upper member 31 for surrounding the welding surface 41 so as to conceal flashes generated during the welding period, and these ribs at the inside work to fix a strainer 33. On the other hand, a strainer receiving surface 44 is formed at the lower member 32 in conformity with the configuration of the strainer 33 periphery, followed by forming a step part 45 at the periphery of the strainer 33 for stiffening and configurational stabilization for housing and fixing the strainer 33 at welding the upper and lower members 31, 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an article comprising a resin body and a member housed in the body and fixed to the body.

[0002]

2. Description of the Related Art A typical article composed of a resin body and a member fixed to and housed in the body is an oil reservoir tank used in an automobile. The oil reservoir tank is composed of a reservoir body made of resin and a strainer for preventing foreign matter from being incorporated therein, and this strainer is generally made of metal.

FIG. 10 is an exploded perspective view of such an oil reservoir tank. In this figure, 11 is a reservoir tank upper member, 12 is a reservoir tank lower member, 1
3 is a strainer, 14 is a baffler (frame) for fixing the strainer 13 to the reservoir tank lower member 12.
Of these, the reservoir tank upper member 11,
The lower member 12 and the baffler 14 are made of resin, and the strainer 13 is made of metal.

FIG. 11A shows a state before an oil reservoir tank is manufactured by assembling these parts. At the junction of the reservoir tank upper member 11 and the lower member 12,
Protrusions 21 and 22 for welding and ribs 23 and 24 for hiding burrs at the time of welding are provided, respectively. To fix the strainer 13, the lower part 1 of the reservoir tank 1
Insert strainer 13 between 2 and baffler 14
Welding using a technique such as ultrasonic welding. Next, the reservoir tank upper member 11 and the lower member 12 are butted so that the projections 21 and 22 thereof are opposed to each other, and the projections of the two are welded and joined by a technique such as vibration. FIG. 11B shows the oil reservoir tank that has been assembled in this way.

[0005]

The production of the oil reservoir tank by the conventional method as described above requires two welding steps, takes time and effort, and the equipment becomes complicated accordingly. There is a drawback that the number of components is large and the management becomes complicated.

Accordingly, the present invention has been made to solve the above-mentioned drawbacks of the prior art and to provide an article, such as an oil reservoir tank, composed of a resin body and a member housed in the body and fixed to the body. Is intended to provide a simple and reliable method of producing a.

[0007]

SUMMARY OF THE INVENTION The method of the present invention comprises a first body member and a second body member forming a resin body;
A method of manufacturing an article composed of an internal member fixed to the main body and housed therein, wherein a peripheral portion of the internal member is arranged at a portion where both main body members are joined, and then the main body members are joined together. It is characterized in that the inner member is fixed by burrs generated from the material of the main body member at the time of welding and welding.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An article manufactured by the method of the present invention comprises a resin body and an internal member fixed to the body and housed therein. The resin body is made from a thermoplastic resin and is divided into two parts, first and second, before being treated by the method of the present invention. The thermoplastic resin forming the main body may be, for example, polyamide (nylon) or the like. On the other hand, the inner member is generally made of a material that does not dissolve when the main body member is welded, for example, a material such as a metal.
However, the internal member may be made of resin as long as no harmful deformation or the like is caused when the main body member is welded.

Next, the present invention will be described with reference to an example of manufacturing an oil reservoir tank for an automobile. FIG. 1 shows an exploded perspective view of a reservoir tank manufactured by the method of the present invention,
FIG. 2 shows a state before the method of the present invention is performed. In these figures, reference numerals 31 and 32 denote an upper member and a lower member of a thermoplastic resin main body, respectively.
A strainer 3 is a metal wire mesh. In the reservoir tank manufactured by the method of the present invention, since the fixing of the strainer and the welding of the main body constituting members are performed in a single step as described later, it is necessary for the tank manufactured by the conventional method. There is no baffler. Upper member 31
As shown in FIG. 2, welding portions 41 and 42 are formed at portions where the lower member 32 and the lower member 32 are joined to each other, and the welding surface 42 of the lower member 32 is formed as an upper surface of the protruding portion. I have. Further, ribs 43 are provided on the upper member 31 so as to surround the welding surface 41, and these ribs make burrs generated at the time of welding invisible. Also plays the role of fixing. On the other hand, the lower member 32 is formed with a strainer pressing surface 44 corresponding to the shape of the peripheral portion of the strainer 33. Further, a step 45 for fixing and stabilizing the shape is provided at the peripheral edge of the strainer 33.

To manufacture a reservoir tank according to the present invention, first, a strainer 33 is temporarily fixed to the lower member 32. This temporary fixing can be performed by setting the inner diameter of the lower member 32 and the outer diameter of the strainer 33 so as to interfere with each other, and setting the strainer 33 while pushing the strainer 33 into the lower member 32. By doing so, it is possible to correct the deformation of the strainer 33 and to cope with the displacement at the time of welding.

Next, the welding surface 41 of the upper member 31 and the welding surface 42 of the lower member 32 to which the strainer 33 is temporarily fixed are made to face each other, and both members are joined using an appropriate welding method, for example, a vibration welding method. The welding surfaces 41 and 42 are welded. In this manner, as shown in FIG. 3A, the upper member 31 and the lower member 32 are integrated, and the welding surface 41 of the upper member is shown in FIG. Strainer 3 between the lower surface and the holding surface 44 of the lower member.
The oil reservoir tank 50 in which the oil tank 3 is inserted is completed.

In the process of welding, the lower member 3
As shown in FIG. 3B, the material of the portion where the welding surface 42 is formed, which protrudes from the surface 45 for fixing the strainer and stabilizes the shape, is melted, and the rib of the upper member 31 is formed as shown in FIG. It flows as a burr 53 into the space 52 between the 43 and the lower member 32 and firmly fixes the reservoir tank body and the strainer. In addition, the rib 4 of the upper member 31
The tip of 3 comes into contact with the strainer 33 and contributes to fixing the strainer 33.

Next, some other embodiments of the present invention will be described. In the previous example, the part that can be used to sandwich the peripheral edge of the strainer between the upper member and the lower member could be made relatively large, but if this part cannot be so widened, the strainer peripheral Figure 2
4A, the strainer 63 having only the vertical rising portion 66 as shown in FIG. 4A can be used. This strainer 6
3 is an upper member 61 on which a welding surface 69 and a rib 65 are formed.
When the upper portion of the projection 67 is disposed between the lower member 62 having the welding surface 64 as the welding surface 64 and both members are subjected to vibration welding,
As shown in FIG. 4B, which is an enlarged view of the welded joint, the strainer 63 is securely fixed by the burrs 68 generated from a part of the material of the convex portion 67. The fact that the ribs inside the upper member 61 contribute to fixing the strainer 63 is the same as in the previous example.

As shown in FIGS. 5A and 5B, it is also possible to use a strainer 73 in which a frame 76 made of a resin material or the like is attached to the outer peripheral portion by insert molding or welding. In this case, as shown in FIG. 5A, the strainer 73 is provided between the upper member 71 having the welding surface 79 and the rib 75 and the lower member 72 having the upper surface of the projection 77 as the welding surface 74. FIG. 5 is an enlarged view of a welded joint when both members are arranged and vibration welded.
As shown in (b), the strainer 73 is securely fixed at the frame 76 by the burr 78 generated from a part of the material of the projection 77. The ribs inside the upper member also contribute to fixing the strainer 73. This example is suitable when a resin strainer is used.

Next, an example in which spin welding is used instead of vibration welding will be described. As shown in FIG. 6A, in this case, the strainer 83 provided with the step portion 86 as described in FIG. 3 is used. The upper member 81 has a welding surface 89 and a rib 85, and the lower member 82 has a welding surface 84.
And a strainer pressing surface 87. After temporarily fixing the strainer 83 to the lower member 82 as in the example described with reference to FIG. 3, the welding surface 89 of the upper member 81 and the welding surface 84 of the lower member 82 are opposed to each other, and both members are welded by spin welding. Let it. FIG. 6B in which the welded joint is enlarged.
As shown in FIG. 8, the strainer 83 is formed by the burr 88 generated by welding and the rib inside the upper member 81.
The mechanism for fixing is as described above.

As still another embodiment, an example using hot plate welding will be described. As shown in FIG. 7A, the upper member 91 used in this case is provided with a welding surface 99, but is not provided with a rib. The strainer 93
The step portion 96 is provided as described with reference to FIGS. 3 and 6. After the strainer 93 is temporarily fixed to the lower member 92 as described with reference to FIGS.
9 and the welding surface 94 of the lower member 92 are opposed to each other, and hot plate welding is performed. As shown in FIG. 7B, which is an enlarged view of the welded joint, the strainer 93 has a burr 98 generated by welding.
Thus, it is firmly and securely fixed.

Still another embodiment will be described with reference to FIGS. In FIG. 8, 101 is an upper member made of a thermoplastic resin, 102 is a lower member made of a thermoplastic resin,
03 is a strainer which is a metal wire mesh. The upper member 101 has a flat welding surface 1 on its end surface.
04 is formed, and a rib 105 is formed on the outer periphery of the end face. Further, the lower member 102 has a welding portion 107 having a welding surface 106 protruding from an end surface thereof, and a rib 108 formed on an inner periphery of the end surface. Further, the strainer 103 has a step portion 109 formed on the outer periphery thereof, which is fitted between the welding portion 107 of the lower member 102 and the rib 108. The outer diameter of the strainer 103 and the inner diameter of the welded portion 107 of the lower member 102 are set close to interference for temporary fixing.

In order to assemble the member formed as described above, as shown in FIG.
09 is pressed between the welded portion 107 of the lower member 102 and the rib 108 to temporarily set the strainer 103 on the lower member 102. Next, the welding surface 104 of the upper member 101 is placed facing the welding surface 106 of the lower member 102, and both are welded by a vibration welding method or the like. In this welding process, as shown in FIG.
The second welding portion 107 is melted, and the burr 110 of the resin that has flowed out fills the space above the step portion 109 of the strainer 103 and fixes the strainer 103. This simplifies the method of fixing the strainer and prevents the strainer from shifting.

As described above, according to the present invention, the resin material of the burr generated during the welding operation is welded from the portions of the first member and the second member forming the article main body which are joined and welded to each other. By flowing into the periphery of the internal member located in the region adjacent to the region and cooling and solidifying at that position, a strong and reliable fixation of the internal member is possible.

Although an oil reservoir tank for an automobile has been described as an example, the present invention is not limited to this, and includes a resin body and a member fixed to the body and housed therein. Applicable to manufacture of any article. Further, the welding method of the first and second members forming the resin body is not limited to the method described in the above description, and any welding method may be adopted.

[0021]

As described above, according to the present invention,
It is possible to easily and reliably manufacture an article composed of a resin body and a member housed in the body and fixed to the body.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an oil reservoir tank manufactured by the method of the present invention.

FIG. 2 is a diagram illustrating an oil reservoir tank manufactured according to one embodiment of the present invention and a manufacturing process thereof.

FIG. 3 is a diagram illustrating an oil reservoir tank manufactured according to the embodiment described in FIG. 2;

FIG. 4 is a diagram illustrating an oil reservoir tank manufactured according to another embodiment of the present invention and a manufacturing process thereof.

FIG. 5 is a diagram illustrating an oil reservoir tank manufactured according to still another embodiment of the present invention and a manufacturing process thereof.

FIG. 6 is a diagram illustrating an oil reservoir tank manufactured according to another embodiment of the present invention and a manufacturing process thereof.

FIG. 7 is a diagram illustrating an oil reservoir tank manufactured by still another embodiment of the present invention and a manufacturing process thereof.

FIG. 8 is a diagram illustrating an oil reservoir tank manufactured in still another embodiment of the present invention and a manufacturing process thereof.

9A and 9B are diagrams illustrating an oil reservoir tank manufactured according to still another embodiment of the present invention and a manufacturing process thereof, wherein FIG.
Is a sectional view before welding, and (b) is an enlarged sectional view of a welded portion after welding.

FIG. 10 is an exploded perspective view of an oil reservoir tank manufactured by a conventional method.

FIG. 11 is a diagram illustrating an oil reservoir tank manufactured by a conventional method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Upper member 12 ... Lower member 13 ... Strainer 14 ... Baffler 31 ... Upper member 32 ... Lower member 33 ... Strainer 41, 42 ... Welding surface 43 ... Rib 44 ... Strainer holding surface 45 ... Step part 50 ... Oil reservoir tank 61 71, 81, 91, 101: Upper member 62, 72, 82, 92, 102: Lower member 63, 73, 83, 93, 103: Strainer 64, 69, 74, 79, 84, 89, 94, 99, 1
04, 106 ... welding surface 65, 75, 85, 95, 105, 108 ... rib 66 ... strainer rising portion 68, 78, 88, 98, 110 ... burr 76 ... frame 86, 96, 109 ... stepped portion

Claims (4)

[Claims] 1. A method for producing an article comprising a first main body member and a second main body member forming a resin main body, and an internal member fixed to the main body and housed therein. A peripheral portion of the internal member is disposed at a portion where the two main body members are joined, then the main body members are welded to each other, and the internal member is fixed by burrs generated from a material of the main body member at the time of the welding. A method for producing a resin article having an internal member. 2. The oil reservoir according to claim 1, wherein the resin article is an oil reservoir tank having a strainer as an internal member.
The described method. 3. A resin article having an internal member produced by the method according to claim 1. 4. A welding surface and a rib are respectively formed on an upper member and a lower member of the reservoir tank, and a step portion is formed on the strainer to be fitted between the welding portion having the welding surface of the lower member and the rib. Then, the step portion is fitted between the welded portion of the lower member and the rib and temporarily fixed, and thereafter,
3. The method for producing a resin article having an internal member according to claim 2, wherein the welding is performed by bringing the welding surfaces of the upper member and the lower member into contact with each other.