JPS63149114A - Molding method of weather strip mold - Google Patents

Abstract

PURPOSE:To enable the title method to insert a core metal even after setting of a form of a core and decision of a mold structure, by fitting a bushing concurrently serving for fixing the core metal beforehand in a hole bored in an appropriate position of the core metal. CONSTITUTION:Holes 3a, 3b are bored in appropriate positions of a core metal 3, a core metal fixing bushing 4 made of rubber or synthetic resin is fitted in the hole 3a and a bushing 6, which is made of the same material as the above, provided with an insertion hole 6a of a fitting clip 5 and serves also for fixation of the core metal, is fitted in the hole 3b. The bushings 4, 6 are provided with fitting grooves 4a, 4b for fitting over the core metal 3. An insertion hole 6a of the bushing 6 is provided with a lip 6c to set up the bushing 6 on a mold after setting up of the bushing on the core metal 3. The core metal 3 is provided with an intrusion through hole 7 for the rubber or the synthetic resin. After the core metal 3, in which the bushings 4, 6 have been fitted, has been set up between a top and bottom forces, a molding material of the mold is cast and molding with a mold is performed. Although the core metal 3 is set up on the bottom force, to begin with, at the time when the core metal 3 is set up on the mold, in the case where the core metal 3 is set up in advance, the diameter of the bushing is made smaller than that of a pin of the mold.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a method for forming a weather strip at a molded portion such as an end portion or a portion of a corner of a weather strip attached to the periphery of an automobile door. It is.

[Prior Art] A conventional weather strip molding method will be described with reference to FIGS. 7 to 11.

8 is a core metal, 9 is a weatherstrip molding part, 9a is a weatherstrip mounting hole, 10 is a counterbore, 11 is a groove for fixing the core metal, 12 is a protrusion to prevent the attachment clip and screw from falling off, 13 is a core Metal holding pin, 14 is core metal holding groove, 15
is a through hole for rubber injection provided in the core metal.

When inserting the core bar 8 into the molded product, the core bar 8 must be set at a position in the lower mold, and the shape of the weather strip must also be considered to match the side structure of the mold. did not become.

[Problems to be Solved by the Invention] As described above, various problems have occurred because the shape of the mold must be determined in accordance with the core metal.

This invention was made in view of these problems.
A weather strip that allows the core metal to be inserted even after the weatherstrip shape and mold structure have been determined separately, without having to match the weatherstrip to the core metal, by fitting a bushing for fixing the core metal onto the core metal in advance. The purpose of this invention is to provide a molding method.

[Means for solving problems] This will be explained with reference to FIGS. 1 to 7.

The molding method for a weatherstrip according to the present invention is a method for molding a molding part 2 of a weatherstrip for an automobile. The core metal fixing bushes 6 provided with clip insertion holes 6a are fitted in advance, and the core metals are set in the lower mold or the upper mold.

[Function] When inserting the core metal fixing bushing 4 into the mold, which is fitted into the proper position of the core metal 3, it comes into contact with the mold to form an appropriate cavity.

[Embodiment] An embodiment of this invention will be described based on FIGS. 1 to 7.

1 is the extruded part of the weather strip, 2 is the weather strip
The molded part 3 of the strip is a plate-shaped core metal embedded in the molded part 2.

Prior to molding the molded part 2, as shown in FIG.
A bushing 4 for fixing the core metal made of rubber or synthetic resin is fitted into the hole 3b, and a hole 6a for inserting a mounting clip 5 made of the same material as shown in FIG. Bush 6 is fitted.

Both bushings 4.6 are provided with fitting grooves 4a and 6'b, respectively, for fitting into the core bar 3, as shown in FIGS. 4 and 5. As a modification of the bushing 6, as shown in FIG. 6, a lip 6C is provided in the insertion hole 6a to prevent the bushing from falling off when the bushing 6 is set on the core bar 3 and then set in the mold.
has been established.

Further, as shown in FIG. 3, the core metal 3 is provided with through holes 7 for biting rubber or synthetic resin at appropriate locations.

After the core metal 3 with the bushings 4 and 6 fitted therein is set between upper and lower molds, molding material of rubber or synthetic resin is poured into the mold and molding is performed.

When the core bar 3 is set in a mold, it is usually set in the lower mold first, but if it is set in the upper mold first, the upper mold is set by making the bushing diameter smaller than the pin diameter of the mold. It is now possible to set the mold.

[Effects of the Invention] According to the present invention, there is no exposed part of the core metal, which is conventionally required for weather strip mounting holes, etc., so rusting of the core metal can be prevented, and the core metal presser that was previously required can be avoided. This eliminates the need for pins and provides an improved appearance by eliminating indentations in the weatherstrip.

[Brief explanation of the drawing]

1 to 7 illustrate one embodiment of the present invention, in which FIG. 1 is a perspective view of the weather strip at section A in FIG. 7, FIG. 2 is a sectional view of the main parts of the same, Figure 3 is the first
4 to 6 are sectional views of each bushing, and FIG. 7 is a side view of the automobile. Figure 8 is a diagram corresponding to Figure 3 of a conventional weather strip;
The figure is a view taken along the line IX-IX in FIG. 8, FIG. 10 is a view taken along the line X-X in FIG. 8, and FIG.
FIG. 1 Extrusion molding section 2 Mold molding section 3 Core bars 3a, 3b holes 4 Bushing for fixing the core bar 4a Fitting groove 5 Mounting clip 6 Bush 6a hole 6b for fixing the core bar Fitting groove 6c Lip 7 Through-hole for biting 8 Core Metal 9 Mold forming part 9a Mounting hole 10 Counterbore 11 Core metal fixing groove 12 Protrusion 13 Core metal holding pin 14 Core metal holding groove 15 Through-hole for injection patent Applicant Agent Nishikawa Rubber Industries Co., Ltd.
Person Patent Attorney Furu 1) Kei Tsuyoshi 1st Prisoner 2nd Figure 3

Claims (1)

[Claims] In the molding method for the molded part of automotive weather strips, a core metal fixing bush or a core metal fixing bush equipped with a hole for inserting a mounting clip is fitted in advance into holes drilled at appropriate locations in the core metal. A weather strip molding method characterized in that the core metal is placed in a lower mold or an upper mold.