JP2000237517A - Filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new filter suited to be reduced in the cost and to be mass-produced, and being high in efficiency of filtering. SOLUTION: In the filter obtained by filling synthetic resin in a heated and melted state into cavities for forming wefts and warps and solidifying the resin in a state where a pair of upper and lower metallic molds with recessed weft forming cavities and warp forming cavities on the matching faces are matched, weft parts 1 are formed into a wave shape and also warp parts 2 are bridged in such a sate that both ends of the warp parts 2 are continued to the side faces of the weft parts 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a filter by injection molding used for a cooler, an air inlet of a computer, and the like.

[0002]

2. Description of the Related Art Conventionally, this type of filter is obtained by weaving a thin synthetic resin monofilament as a warp and a weft to form a rope and fastening it to a synthetic resin frame by heat welding or the like. ,

[0003] The filter disclosed in Japanese Patent No. 2619757 includes a mold in which a weft yarn forming cavity and a weft line forming cavity are recessed on the mating surface, and a warp yarn forming cavity and a vertical line forming cavity. The other mold is formed by recessing the mating surface, and the mating surfaces of these molds are aligned with the weft forming cavity and the warp forming cavity and the weft forming cavity and the vertical forming cavity being orthogonal to each other. The mold is closed in such a manner that the openings of the orthogonal cavities communicate with each other at the locations, and the openings of the cavities are closed by the mating surfaces of the dies facing each other at the non-orthogonal locations. Is filled with heat-melted synthetic resin from a large number of gates provided in advance in the other mold as appropriate, and the mold is opened after cooling and solidifying the filling. It was of the planar obtained by injection molding taking out the molded product.

[0004] The former has a defect that the process of fastening the synthetic resin frame is relatively complicated, and is not suitable for cost reduction and mass production.

[0005] The latter can obtain a filter by injection molding, and is preferable because it has the effect of enabling cost reduction and mass production. However, filtration holes are arranged in a plane. In this state, the total filtration area was small and the filtration efficiency was low.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel filter having a high filtration efficiency which is suitable for both cost reduction and mass production.

[0007]

In order to achieve the above-mentioned object, a filter according to the present invention comprises a pair of upper and lower molds, each having a cavity for forming a weft yarn and a cavity for forming a warp yarn formed in a mating surface. In a filter obtained by filling a heat-fused synthetic resin into a weft / warp forming cavity and solidifying the same, the weft is formed into a wavy shape, and both ends of the warp are continuous with the side surfaces of the weft. It was handed over in a state,

A warp portion is provided between points on the way from the valley portion of the weft portion to the top portion, between the valley portions of the weft portion, and between the top portions,

[0009] Further, some of the weft yarns are formed as a large-diameter weft.

[0010] In addition, some of the warp yarns are formed as large-diameter horizontal rails,

Further, an outer frame is provided on the outer periphery comprising left and right horizontal sides exhibiting the same waveform as the weft thread, and upper and lower vertical sides exhibiting a rod shape.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in the drawings, a pair of dies (not shown) having a cavity for forming a weft yarn and a cavity for forming a warp yarn formed on a mating surface are formed. The cavity for weft / warp formation is filled with a heat-melted synthetic resin, which is cooled and solidified. A large number of weft yarns 1 exhibiting a corrugation, and from the valley to the top of the weft yarn 1. The number of warp yarns 2 provided between the midpoints of the weft yarns 1 and between the valleys of the weft yarns 1 and between the tops in such a manner that both ends are continuous with the side surface of the weft yarns 1, A horizontal bar portion 3 provided with a large diameter, a vertical bar portion 4 provided with some of the warp yarn portions 2 having a large diameter, a left and right horizontal side portion 5 exhibiting the same waveform as the weft portion 1, 6 and an outer frame 9 composed of upper and lower longitudinal sides 7 and 8 having a straight rod shape. In which obtained the goods 10

The present invention can be carried out without the horizontal bar 3 or without the vertical bar 4 or without the outer frame 9. 1
According to the present invention, it is possible to implement a cylindrical shape, a rectangular tube shape, or the like according to the present invention.

[0014]

The filter according to the present invention has the above-mentioned structure, that is, as can be seen from the drawings, the inclined filtration surface for providing a filtration hole in which each inclined portion of the weft is wider than the conventional flat filtration surface. Since it is a configuration that forms a filter, it is possible to secure a wide filtration area, and has a remarkable effect that can completely achieve the intended purpose of providing a novel filter with high filtration efficiency. Yes, Claim 2
Is suitable for providing fine-grained filters,
The filters according to Claims 3, 4, and 5 have excellent effects such as being optimal for providing a durable and good shape-retaining property since the crosspiece and the outer frame perform a reinforcing function. .

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is an enlarged sectional view taken along the line AA of FIG. 1;

FIG. 5 is an enlarged sectional view taken along the line BB of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Weft part 2 Warp part 3 Horizontal bar 4 Vertical bar 5, 6 Both right and left horizontal sides 7, 8 Upper and lower vertical sides 9 Outer frame 10 Finished product

Claims (5)

[Claims] 1. A weft and warp forming cavity is filled with a synthetic resin in a heated and molten state in a state where a pair of upper and lower molds having a weft forming cavity and a warp forming cavity recessed in a mating surface are put together. What is claimed is: 1. A filter obtained by solidifying a filter, wherein a weft portion has a wavy shape, and a warp portion is provided so that both ends of the warp portion are continuous with side surfaces of the weft portion. 2. The filter according to claim 1, wherein a warp portion is provided between points on the way from the valley portion of the weft portion to the top portion, between valley portions of the weft portion, and between the top portions. 3. The filter according to claim 1, wherein some of the weft yarn portions are formed as large-diameter weft bars. 4. The filter according to claim 1, wherein some of the warp yarn portions are formed as thick vertical bar portions. 5. The filter according to claim 1, wherein an outer frame comprising left and right horizontal sides exhibiting the same waveform as the weft section and upper and lower vertical sides exhibiting a rod shape is provided on the outer periphery.