JPH05193023A - Manufacture of filter made of plastic by use of mesh cylinder with joint - Google Patents

Abstract

PURPOSE:To manufacture a filter made of plastics, in which the joint of a mesh cylinder is buried positively into a rib in the axial direction of the filter using the mesh cylinder with the joint as a filtering surface. CONSTITUTION:Recessed sections 13A, 13B for forming ribs in the axial direction are formed to parting surfaces brought into contact in split molds 11a, 11B and recessed sections 15A, 15B for shaping resin reservoirs communicated through clearances 14A, 14B to the recessed sections 13A, 13B, and the joint 1' of a mesh cylinder 1 is penetrated into the recessed sections 15A, 15B for forming the ribs, thus forming a filter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an oil filter for automobile traction control, which filters by a meshed mesh tube, and other small, cylindrical plastic filters.

[0002]

2. Description of the Related Art For example, nylon 6 having a wire diameter of 0.05 mm
In the case of manufacturing a filter for filtering with a resin mesh material having a thickness of 0.09 mm and a 200 mesh according to No. 6, either side edges of one mesh material are welded as shown in FIG. One side edge portion and the other side edge portion are welded to each other to form a mesh tube 1 having axial seams 1'and 1 ', and this is fitted to a core pin between two split molds. , The joint is directed to the rib-forming recess forming the axial rib of the filter, both split molds are closed to mold the filter with plastic, and the mold is opened to remove the product (filter) from the mold.

[0003]

An example of the filter thus manufactured is shown in FIG. 4 and its sectional view taken along the line AB is shown in FIG. 5. As shown in FIG. 5A, the joint 1'of the mesh tube 1 is shown.
Need only be buried in the rib 3 in the axial direction of the filter 2. However, when the seam 1'is not properly oriented to the rib-forming recess of the split mold, the mold may be closed to form the filter, and then the seam 1'is obtained from a position other than the rib as shown in FIG. 5B. When this product is used, the mesh material is ruptured from the seam 1'at the internal pressure of oil, and the filter function is lost, causing a serious failure. Therefore, in order to select and remove defective products whose seams are exposed to the outside, it is necessary to carefully inspect each product,
The inspection is very troublesome.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, the seam 1'of the mesh cylinder 1 is always buried in the axial ribs 3 of the filter, and the second half of the filter is molded. In a method of manufacturing a plastic filter by a seamed mesh tube, in which a mesh tube with a seam is embedded in one split mold, and a filter is molded around the mesh tube with plastic, the parting surface of the two split shoulders is used. A rib forming recess is provided in the axial direction of the filter, and a resin pool forming recess communicating with the recess via a gap, and the seam of the mesh tube is inserted from the rib forming recess through the gap into the resin pool forming recess. It is characterized in that it is made to plunge and the plastic for forming the filter is made to enter the resin pool forming recess.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, 11A and 11B are two split molds for molding a filter half body, and axial part ribs 3 of the filter 2 are half-formed on each parting surface 12A, 12B. Two rib forming recesses 13A, 1
3B, and two resin pool forming recesses 15A, 15B for forming half the resin pool communicating with the respective recesses via the gaps 14A, 14B. Gap 14A, 14
The gap formed by combining B is slightly thicker than the thickness of the seam 1'where the mesh materials are combined (for example, when the thickness of the mesh material is 0.09 mm, twice that is 0.18 mm). 0.2 mm.

[0006] The length of the joint 1'for making the mesh material into the mesh tube 1 has been made as short as possible in the past.
The ribs are made long so that they pass through the rib forming recesses 13A, 13B and the gaps 14A, 14B and reach the resin pool forming recesses 15A, 15B.

The molds 11A and 11B opened by this
The mesh tube 1 is fitted to the core pin 16 between the mold 11
When A and 11B are closed, even if the joints 1'and 1'are not oriented to the rib-forming recesses as shown in FIG. 3, the joints 1'and 1'are pushed by both molds and the core pin 16 is pressed. When the molds are turned up and both molds are closed, the outer ends of the joints are located in the resin pool forming recesses 15A and 15B (see FIG. 1).

Therefore, when the resin is injected into the mold to mold the filter 2, a part of the resin will be a rib forming recess 13A,
After filling 13B, the resin pool forming recesses 15A, 15B are filled through the gaps 14A, 14B.

When the molds 11A and 11A are opened after molding and the filter 2 is removed from the mold, the resin reservoir 15 is connected to the axial rib 3 by the thin wall 14 (see FIG. 2). The thin portion 14 is composed of the seam 1'of the mesh cylinder and the plastic film attached to it, and can be easily cut. Therefore, the thin portion 14 is cut by this to separate the resin pool 15 from the filter to obtain a product.

The filter 2 has a cylindrical open frame portion 4 at one end in the axial direction and a closed end portion 5 at the other end, and each end portion of the mesh tube is connected to the open frame portion 4 and the closed end portion 5. It is buried shallowly. Therefore, the open frame portion 4 of both molds, the gaps 14A and 14B communicating with the respective concave portions for forming the closed end portion 5, and the resin pool forming concave portions 15A and 15B are formed on the parting surface 1.
2A, 12B, and axial rib forming recess 13A,
14A and 14B provided on 13B and 15A and 15B may be connected in series.

[0011]

As is apparent from the above, according to the present invention, since the joint 1'of the mesh cylinder is embedded in the axial rib of the filter to form the filter, the joint 1'is not exposed from other than the rib. There is no room for good products. Therefore, it is troublesome,
It is possible to omit the laborious and time-consuming inspection work.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state where a filter is molded according to the present invention.

FIG. 2 is a perspective view of the filter with the mold opened and the mold removed.

FIG. 3 is a cross-sectional view showing a state in which a core cylinder is covered with a mesh cylinder and a mold is closed.

FIG. 4 is a perspective view of a mesh cylinder.

FIG. 5 is a perspective view of a filter.

6 is a cross-sectional view of the conventional filter taken along the line AB of FIG.

[Explanation of symbols]

 1 mesh cylinder 1'seam of mesh cylinder 2 filter 3 rib in the axial direction of filter 4 open frame part 5 closed end part 11A split mold 11B split mold 12A parting surface 12B parting surface 13A rib forming recess 13B rib forming Recessed portion 14 Thin portion 14A Gap 14B Gap 15 Resin pool 15A Resin pool formation recess 15B Resin pool formation recess 16 Core pin

Claims (2)

[Claims] 1. A method of manufacturing a plastic filter using a seamed mesh tube, wherein a mesh tube with a seam is provided inside two split molds for molding half of the filter, and the filter is molded with plastic around the mesh tube. In the method, a rib forming recess is provided on the parting surface of the two split shoulders in the axial direction of the filter, and a resin pool forming recess communicating with the recess through a gap, and the seam of the mesh cylinder is ribbed. A method for manufacturing a plastic filter using a mesh cylinder with a joint, characterized in that the plastic for filter molding is made to penetrate into the recess for forming the resin pool through the gap from the recess for forming the resin to enter the recess for forming the resin pool. .. 2. The method of manufacturing a plastic filter using a meshed mesh tube according to claim 1, wherein the resin pool of the molded filter is separated from the ribs. ..