JPS5924640A - Manufacture of material with raised surface - Google Patents

Abstract

PURPOSE:To improve the abrasion strength and reduce the machining time by a method wherein mixed stock consisting in mixing molding stock with short fibers is press-molded into a predetermined shape and at least a part of the press-molded piece is polished so as to expose the short fibers. CONSTITUTION:The molding stock such as synthetic rubber, plastics or the like and the short fiber cut in a certain fixed length are provided and mixed with each other at a certain fixed ratio. Next, the resultant mixed stock is extruded as it is by an extrusion molding machine and then cooled. The extrusion-molded piece contains fibers in the vicinity of its surface. Polishing is applied onto the area, in which the raised surface is formed. The polishing is performed by rotating a needled mat, a sand paper or the like. As a result of polishing, the molding stock layer in the surface area of the extrusion-molded piece is scraped so that the inner short fibers are protruded over the surface, changing the polished surface into raised state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing automobile wafer strips, runde yarns, bell moldings, etc., and more particularly, to a method for manufacturing materials that form the raised surface. Zuru.

For example, in a car, remove wind and rain strips from the panel and glass.
In addition to preventing the intrusion of water and dust, it also reduces the impact when the door is closed and prevents the door from vibrating while driving. In addition, a glass rande channel is installed on the door lash.
To guide the glass and let it fall smoothly,
Prevents the invasion of mountains, etc.

By the way, this glass land IF tunnel is made of synthetic rubber or plastic, but it is also made of plastic on a part of the surface of the surface of the surface of the sea urchin, etc., to reduce sliding resistance. □-Iron pile (short fibers) is provided to form a raised surface. Conventionally, the production of the element 4rA 17) that forms such a raised surface is performed using a molding raw material such as synthetic rubber or plastic. After extrusion molding and cold IJI, adhesive is applied to a predetermined surface, nylon pile is electro-flocked with hf1, and after drying, the remaining night pile is collected.

However, such conventional methods (!3) have the problems of a high incidence of product defects due to defective joints, low adhesive strength, and insufficient abrasion strength.

Another problem is that the processing time becomes longer due to the time it takes for the adhesive to dry.

The present invention has been made in view of this point.
In the second step of extruding the RJL into a predetermined shape, at least a portion of the extruded product formed in the second step is polished to expose the short fibers. By taking the third step of forming a raised surface by rolling, the incidence of product defects can be reduced to almost zero, the abrasion strength can be improved, and the time required for reconsolidation can be shortened.

Hereinafter, the method for manufacturing Mokukomei will be explained in detail with reference to FIG.

In the method of the present invention, first, a molding raw material such as synthetic rubber or Plus Deck is prepared with fibers cut to a certain length or zero fiber (Culm 1), and these are mixed in a certain ratio (Step 2).
). This fiber is synthetic fiber with a softening point of 180°C or higher (1), such as poly 1 sprue fiber, navy blue Nylon fiber, or rayon, $I11. l.Realette 1 - A hydrophilic fiber IC such as a carded cord, and a weave that does not undergo heat shrinkage or erosion at the molding temperature is used. Further, the mixing ratio will be changed depending on the required napping state.

Next, after extruding the )r1 raw material 1 into an extrusion molding layer d3 as desired, it is cooled (step 3). This extrusion molded product contains fibers (7, ti woven) near the surface E1. So, do you want to form a raised surface on the ribbed part? tll
Decorate with polish. This polishing? 1) Roll something that has a rough surface, such as cloth or lint paper, and has a high degree of bhlIi.

this? +! As a result of the first polishing, the forming stone layer on the surface of the extrusion molded product is scraped off, and the inner chiken structure protrudes from the surface, and the ti
ll 11 faces become piloerected (I culm/l).

In this way, IL′? Unlike the electrostatic 4111 method, where a nylon pile is planted in the adhesive layer, it becomes integrated with the molded product, so it exhibits strong adhesive strength.

The preferable thickness of the type 1 Al strip used in the method of the present invention is 0.7 to 100.0 deniers, and the length is 0.3 to 1 denier.
0.0 millimeter 1-meter. In addition, the mixing ratio (
Heavy lH) is a molding material! -C1 short fiber 1 for 1 ljl 1
1 (0.2 to 1.0).By changing the thickness, length, and mixing ratio, it is possible to obtain 1 g of pilaf with the desired hardness and density.

Note that FIGS. 2 to 4 are cross-sectional views of products molded by the method of the present invention. The cross-sectional shapes and manufacturing methods of these products will be briefly explained below.

First, the belt molding 1 shown in FIG. 2 consists of a molding part 2 and a weather strip part 3. Wellie
The slip portions 1 to 3 are attached to the molding portion 2 so as to cover the inner and outer surfaces of one lunge portion thereof, and are provided with two lips 4° and 5 on the outside thereof. This lip 4,5
The glass sliding contact part has a raised surface of 6
, 7 are provided. The production of the belt molding 1 made of C/C++i starts with a roll forming process (that is, a forming process of the 72-rudding part 2) in which a steel strip material such as stainless steel is formed into a predetermined cross section. Then, after the roll forming process is completed, the extrusion process is started, and in the extrusion process, the lips 4 and 5 are attached, and the lip part 3 is integrally attached to the molding part 2. to adhere to.

Then, in the next step, the glass sliding contact portion is polished 19, and a raised surface of the lip 4.5 is formed by this polishing.

The weather 1 helix 8 shown in Fig. 3 has a lip 11 integrally formed with a base 10 that envelops a core bar 9, and a raised surface 12 is provided at the part of the lip 11 that contacts the glass 1. , is similar to the belt molding 1 described in 11a (
After the roll forming process of the core metal 9, the extrusion process is performed.

The Lande tunnel 13 in Fig. 4 consists of a base 1/I and a tip 7J.
It consists of a tooth-shaped flange part 15.16, and when it is assembled into a door nut etc. (indicated by a single point), a raised surface 17.1ε), 19 is attached to the part that comes into contact with the glass.
are doing. The manufacturing method shown in FIG. 1 is the same as the method of the present invention.

The products shown in FIGS. 2 to 4 are examples of products obtained by applying the method of the present invention, and the present invention can be applied to processes other than the above-mentioned molding of automobile parts. In the invention, there is no adhesion failure, so the incidence of product defects is extremely low.In addition, the adhesive strength is high, so sufficient abrasion strength can be obtained.Furthermore, since there is no independent adhesion process, the adhesive The time required for drying etc. is eliminated, and the processing time is reduced to zero.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the manufacturing process of the present invention, Fig. 2 is a cross-sectional view of a molding made using the method of the present invention, and Fig. 3 is a weather manufactured using the method of the present invention. A cross-sectional view of the I-lip, FIG. 4, shows the lunch 1? FIG. 1... Belt molding 2... Molding part 33... Wearth] ~ Lip part 4.5... Lip 6.7... Raised part 8...
Sea urchin I ground 1-Lip 9... Core bar 10... Base 11... Lip 12... Raised portion 13... Lande tunnel 14... Base 15.16... Flange portion 17.18 .19...Tachimobu Special 81 Applicant: Shiraki Metal] Nigyo Co., Ltd. (1 other person) Representative: Patent Attorney Fujiji Ijima

Claims (1)

[Claims] A first step of mixing short fibers into the forming raw material 1F+;
A second step of extruding the obtained mixed raw material 1 into a predetermined shape, and polishing at least a part of the extruded product obtained in the second step to form the short fibers. A method for manufacturing a material for forming a raised surface, characterized by taking a third step of forming a raised surface to expose the material.