JPH0396617A - Dust preventive net for radiator and its manufacturing method - Google Patents

Abstract

PURPOSE:To make it possible to manufacture even a dust preventive net at low cost in a simple manner, which is excellent in performance while being formed into a 3 dimensional multi-face structural body, by heating a frame body so as to be fused, which is made of thermoplastic synthetic resin while being so formed as to support a dust preventive net, and thereby integrating said net and said frame body into one body. CONSTITUTION:When a dust preventive net 1 for a radiator, for example, the dust preventive net 1 which is set on the front surface of a flat type radiator in use, is manufactured, a metallic net 2 roughly 0.5 to 0.8mm in mesh size is first cut out into a rectangular shape in a specified dimension. In the second place, thermoplastic resin sheets 3 which are provided with suitable width and thickness while being suitably cut off in length, are interposed to 4 peripheral sections of the aforesaid metallic net 2 while a suitable over-lapping margin for the both surfaces of the net is maintained. Following which, the thermoplastic resin sheets 3 are held between paired upper and lower metal molds which are formed into a specified shape with specified dimensions while being heated at ambient temperature so that a frame 4 is thereby formed, whereas being temporarily fitted concurrently. After that, the frame 4 is fused in a high temperature environment, the frame 4 and the respective periph eral sections of the metallic net are concurrently integrated into one body.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dustproof screen for a radiator in which a dustproof screen body is integrally joined to a frame, and a method for manufacturing the same.

As shown in Fig. 1, the conventional dustproof screen attached to the front of the radiator has a metal frame curved with a U-shaped cross section around the four peripheries of a plain-woven wire mesh 01. 02 and 03, the metal frames 02 and 03 were pressed and caulked from both front and rear surfaces, and the overlapping parts of the adjacent frames 02 and 03 were spot welded.

However, it is a fortune telling. However, it took a lot of man-hours to caulk the metal frame around the periphery of the cut wire mesh, and it was expensive for a simple product.

In addition, in order to reduce the size of the radiator while maintaining a high level of heat dissipation, many radiators have recently narrowed the distance between the heat dissipation fins, so by increasing the area of the front air intake port of the radiator, There is a demand to reduce the wind speed in front of the radiator and prevent dust from adhering to the heat dissipation fins, but in order to do so, the dustproof wire mesh needs to have a three-dimensional multi-sided structure, and the metal frame as mentioned above is required. However, this method inevitably increases production costs and makes it difficult to make the dustproof screen three-dimensional.

Furthermore, a wire mesh made of injection molded resin in place of the metal frame has been proposed, but the mold for the hollow shape is very expensive and the purpose of cost reduction could not be achieved.

The present invention relates to a dustproof screen for a radiator that overcomes these difficulties and a method for manufacturing the same, and includes a thermoplastic resin or resin frame formed in a shape capable of supporting the dustproof screen body. The dustproof net main body is integrated, the thermoplastic synthetic resin is shaped into a shape capable of supporting the dustproof net body, and the dustproof net main body is applied to the thermoplastic synthetic resin frame. The invention is characterized in that the thermoplastic resin frame and the dust-proof screen body are exposed to a high-temperature atmosphere to integrate them after being clamped between two molds.

According to the present invention, it is extremely easy to manufacture a dustproof screen for a radiator having a three-dimensional polyhedral structure, and the number of manufacturing steps is significantly reduced compared to the conventional one.

Further, the mounting portion of the frame body can be appropriately embossed to improve the adhesion of the frame body to the vehicle body or the like.

Therefore, a dustproof net for a radiator that is inexpensive and has excellent performance and a method for manufacturing the same are provided.

An embodiment of the present invention illustrated in FIG. 2 will be described below.

The dust-proof rope 1 for a flat-plate radiator shown in Fig. 2 is made by cutting a wire mesh 2 with a mesh size of approximately 0.5 to 0.8 mm into a rectangular shape with a predetermined size, and then cutting the four peripheral edges of the wire mesh 2 into a rectangular shape with an appropriate width. A thermoplastic resin sheet 3 having a thickness and cut to an appropriate length is cut from both sides with an appropriate overlap, and is placed between a pair of upper and lower molds (not shown) having a predetermined size and shape, and heated at room temperature. Press,
It is obtained by temporarily attaching the frame 4 by stamping molding, and then melting and integrating the peripheral part of the wire mesh 2 to the frame 4 in a high temperature atmosphere.

Note that mounting holes 5 are provided at required locations on the frame 4.

In the embodiment shown in FIG. 2, the peripheral edge of the wire mesh 2 is integrated with the thermoplastic resin sheet frame 4, so that the wire mesh 1i12 does not deform and the dustproof Y41 has high strength and rigidity. ,
Rich in durability.

In addition, there is no need for special molds, and the number of processing steps is small.
Significant cost reductions are possible.

Next, the embodiment shown in FIG. 3 will be described.

The thermoplastic resin frame 7 has a side portion 7b standing upright from the flange portion 7a, an inclined portion 7c tapered from the top end of the side portion 7b, and a top portion 7d formed at the top end of the inclined portion 7c. The frame 7 is formed by injection molding.

In addition, the side part 7b, the inclined part 7c and the top part 7d of the frame 7 have
The radiator dustproof mesh 6 having a three-dimensional polyhedral structure can be obtained by temporarily attaching the peripheral edges of the wire meshes 8a, 8b, and 8c by stamping, and then heating and melting them to integrate them.

Further, a mounting hole 9 is also provided in the flange portion 7a of the frame 7.

In the embodiment shown in FIG.
6, it is possible to reliably remove dust from the air with little ventilation resistance, and prevent dust from adhering to the fins of the radiator.

[Brief explanation of drawings]

FIG. 1 is an exploded explanatory view showing the structure of a conventional dustproof net for a radiator, and FIG. 2 is an exploded explanatory diagram showing the structure of a conventional dustproof net for a radiator, and FIG. FIG. 3 is a perspective view of a dustproof screen for a radiator having a three-dimensional polyhedral structure according to the first embodiment. 1... Dustproof net for radiator, 2... Wire mesh, 3...
Thermoplastic resin sheet, 4... frame, 5... mounting hole,
6... Dustproof net for radiator, 7... Thermoplastic resin frame, 7a... Flange part, 7b... Side part, 7c...
- Inclined part, 7d...Top part, 8a, 8b, 8c...Wire mesh, 9...Mounting hole.

Claims (2)

[Claims] (1) A dustproof screen for a radiator, characterized in that the dustproof screen body is integrated with a thermoplastic synthetic resin frame formed in a shape capable of supporting the dustproof screen body. (2) After molding a thermoplastic synthetic resin into a shape that can support the dustproof net body, and pressing the dustproof net body onto the thermoplastic synthetic resin frame between a pair of molds, A method for manufacturing a dustproof screen for a radiator, characterized in that a frame made of plastic synthetic resin and the main body of the dustproof screen are integrated by exposing them to a high temperature atmosphere.