JPS6145934B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-cavity molded body of molded parts.

It has a design function, such as the operating knobs of switches in consumer electronic devices, and needs to be treated with decorative processing to avoid scratches, stains, damage, etc., and maintain its aesthetic appearance. When processing design parts using plastic materials using the molding method, there are some problems with the appearance of the molded parts during the handling, packaging, transportation, and assembly of individual parts up to the assembly process after molding. Particular care should be taken when handling the parts, as they may cause scratches, stains, damage, etc., and special consideration should be given to the contents of the packaging when transporting the parts. Therefore, the cost is higher than that for structures, mechanical parts, etc. The purpose of the present invention is to protect the appearance of parts and enable easy packaging during handling and packaging.In particular, the present invention aims to protect the appearance of parts and enable easy packaging. This is intended for use when the product is removed from the mold and used before the product assembly process or by cutting the assembly process gate.

FIG. 1 shows the shape of a single operating knob as an example. 1 is the tip of the knob that you press with your finger, 2 is the lever insertion part that has a square hole that is inserted or press-fitted into the lever of the switch (not shown), and the area around the tip 1 is designed to protrude from the device exterior. become a part.

Conventionally, when molding multiple pieces of the above-mentioned operation knob using plastic material,
The layout is shown in Figures 2 and 3,
The material washed out from the spool 3 is molded into a shape with knobs arranged on both sides of a runner 4 placed in the center.If many of the same knobs are used in a device, molding is performed to reduce assembly man-hours. Instead of cutting the rear gate opening 5 immediately, a method is used in which the gate opening 5 is cut before the assembly process or after a plurality of simultaneous assembly processes.

In such a case, it is necessary to package and transport the product with a runner gate, and since it is necessary to protect the design area near the knob tip 1, various packaging contents have been considered (not shown). The content is complicated and increases costs, and the parts must be handled with care to avoid scratches, dirt, or damage to the designed parts.

The present invention is an attempt to improve the above-mentioned problems. FIGS. 4 and 5 show the multi-cavity molding shape of the present invention. In the conventional configuration where the knobs 8 are arranged on both sides of the runner 7 from the spool 6, by providing runners 9 extending outside the row of knobs 8 at right angles from both ends of the runner 7, an H-shaped runner shape is created. While doing so,
A pin 10 is provided near both ends of the runner so as to be higher than the tip 11 of the knob 8, and a pin 12 which is one step thinner than the pin 10 is provided above the pin 10.
Further, there is a hole 1 which allows the pin 12 to be inserted into the back side of the runner where the pin 10 is provided and which is longer than the pin 12.
3 are provided for each.

With the above structure, by cutting the spool 6 at a position lower than the pin 10, it is possible to stack and connect multiple pieces as shown in FIG. 9. It will be located more internally than the pin 10.

With the above configuration, packaging for resin plating and transportation to the next process can be stacked and placed inside the box, making it easier to use partitions made of different materials inside the box than in the past. There is no need for packaging materials, reducing packaging work, packaging man-hours, packaging material costs, and increasing the number of packaging storage personnel.In addition, the design of knob 8 is protected by runners and pins during handling. For,
It is possible to reduce the risk of scratches, stains, and damage to the design area.

[Brief explanation of the drawing]

FIG. 1 is a sketch showing an example of an operating knob, FIG. 2 is a sketch showing a state of multi-cavity molding in a conventional example, FIG. 3 is a side view of the state shown in FIG. 2, and FIG. A sketch showing the state of multi-cavity molding, FIG. 5 is a side view of the state of FIG. 4, and FIG. 6 is a diagram showing the state of FIG.
It is a side view when the molded products shown in the figure are stacked. 1...Knob tip, 2...Lever insertion part, 6
...Spool, 7...Runner, 8...Knob,
9...Runner, 10...Pin, 11...Tip,
12...pin, 13...long hole.

Claims (1)

[Claims] 1 When molding parts that require an aesthetically pleasing appearance, such as operating knobs for switches in equipment, using plastic materials in multiple pieces, the runners are made into an H-shape. A protrusion is provided in the vicinity of each of the four tips of the H-shape in a direction perpendicular to the runner, and the protrusion is made higher than the height of the product. A multi-piece molded part characterized in that a hole is formed on the back side of the runner of each of the protrusions into which a one-step narrower protrusion can be inserted, so that the multi-piece molded parts can be stacked and connected. Molded object.