JPS643680Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for manufacturing synthetic resin products, and its purpose is to manufacture a large number of products with excellent shapes in a short period of time without requiring post-processing.

For example, when molding a synthetic resin product such as a base cup that has a cylindrical shape with a bottom, it is extremely inefficient to mold each product one by one from a single molding die, which takes time, effort, and cost. It was hot.

Therefore, a large synthetic resin plate is compressed and deformed by a pair of molds, and a synthetic resin body, which is a primary molded product having many bottomed cylindrical product parts, is compression molded. It is conceivable to simultaneously punch and form the product parts such as the following with a punch.

Alternatively, the synthetic resin body described above may be injection molded.

According to such means, it is possible to form a large number of bottomed cylindrical products in a short period of time, but when making a large number of products as described above, it is necessary to use a punch and an opposing punch. With respect to die,
If the product part of the synthetic resin body is not aligned accurately, burrs will form on the punched edges of the product part, requiring post-processing, which will not only not improve work efficiency but also result in a large number of defective products. It ends up.

The present invention is an apparatus devised to eliminate the above-mentioned drawbacks and inconveniences of the conventional method. The apparatus comprises a die having an opening diameter slightly larger than the product parts of a synthetic resin body obtained by continuously molding a number of cylindrical product parts with a bottom, and a synthetic resin body portion around the product parts is pressed and clamped between the die,
The stripper is made up of a stripper plate that presses and deforms the stripper, and a punch that slides through the stripper plate.

An embodiment of the present invention will be described below with reference to the drawings.

First, FIG. 1 shows a primary molded product used in the apparatus of the present invention.

This primary molded product is a synthetic resin body 1 that is compression molded by pressing and deforming a single large synthetic resin plate between a pair of molds, and includes a plurality of product parts in the shape of a cylinder with a bottom. 2 is continuously molded so as to protrude from a single side through a flat connecting part 3, and this product part 2
A ring-shaped groove portion 4 is bent in the peripheral connecting portion 3 portion.

Alternatively, this synthetic resin body 1 may be injection molded.

2 and 3 show an apparatus of the present invention for individually separating and cutting each product part 2 of this synthetic resin body 1, and shows a die 5 and a stripper plate 7.
and punch 9.

A large number of dies 5 are provided corresponding to the arrangement of each product part 2, and the diameter thereof is slightly larger than the outer diameter of the upper end of the product part 2. Also, between adjacent dies 5, there is a die around each product part 2. A guide groove 6 is formed into which the bent groove 4 fits. Synthetic resin body 1
is mounted on each die 5 described above in such a manner that each product part 2 is fitted into each die 5 and each groove part 4 is fitted into each guide groove part 6, but the stripper plate 7 is mounted on the die 5. It is located opposite to 5 and can be moved up and down freely,
At the lower limit, the main body portion 7a presses and clamps the connecting portion 3 of the synthetic resin body 1 with the upper end of the die 5. At the lower center end of the main body 7a of the stripper plate 7, a short cylindrical pressing part 8 is suspended at a position facing the guide groove 6 formed between each die 5. When the stripper plate 7 is lowered with the resin body 1 mounted on each die 5 at a predetermined position, the push-down portion 8 will fit into the groove portion 4. Further, the punch 9 is disposed at an upper position facing the inner edge of each die 5 through the stripper plate 7 so as to be slidable up and down.

Now, in the above-described structure, as shown in FIG. 2, the synthetic resin body 1, which is a primary molded product molded into a desired shape, is placed on each die 5 by fitting the product part 2 and the groove part 4 into predetermined positions. the stripper plate 7 is lowered.

This lowering first causes the stripper plate 7 to
The tip of the pushing part 8 fits into the groove 4 of the synthetic resin body 1, and the connecting part 3 of the synthetic resin body 1 is pushed into the guide groove 6 together with the groove 4, thereby being pulled and deformed. Due to this deformation of the connecting part 3, the upper end of the product part 2 is spread out in the radial direction with a uniform force, and the outer periphery of the upper end of the product part 2 comes into contact with the inner periphery of the upper end of the die 5.

At the lower limit of the stripper plate 7,
While maintaining the above state of product part 2, connect part 3,
The main body portion 7a and the upper end of the die 5 are pressed and clamped.

FIG. 3 shows this pressing and clamping state. In this state, the punch 9 descends, separates and cuts between the outer peripheral edge of the product part 2 and the connecting part 3, and forms the desired product 1.
0 (Figure 4) is obtained.

Since the downward movement of each of the punches 9 is performed simultaneously, all the product parts 2 of the synthetic resin body 1 are punched out into the product 10 in one operation.

As is clear from the above description, the synthetic resin product manufacturing apparatus of the present invention uses, as a primary molded product, a synthetic resin body 1 in which a large number of product parts 2 are continuously molded via connecting parts 3, and each product part 2 are simultaneously punched out through the punch 9, and during this punching, the diameter of each product part 2 is expanded until it becomes equal to the diameter of the die 5, and the stripper plate 7
The surrounding connection parts are clamped by the holder.

Therefore, the outer edge of the upper end, which is the cut portion of the molded product 10, can be cut smoothly and accurately without the occurrence of burrs or the like on the connecting portion 3.

Therefore, according to the device of the present invention, it is possible to simultaneously manufacture a large number of bottomed cylindrical products, and since no burrs are generated on the cut parts of the products, there is no need for post-processing, and there is no possibility of defective products. It has many excellent functions and effects, such as no generation, good workability, can be manufactured in a short time and at low cost, and the structure of the device is simple.

[Brief explanation of the drawing]

FIG. 1 is a sectional perspective view of a primary molded product used in the device of the present invention, FIGS. 2 and 3 are sectional views of the device, and FIG. 4 is a sectional view of the product. Explanation of symbols, 1...Synthetic resin body, 2...Product part, 3...Connection part, 4...Groove part, 5...Die, 6
...Guide groove, 7...Stripper plate,
8...Press part, 9...Punch, 10...Product.

Claims (1)

[Scope of utility model registration request] A synthetic resin product manufacturing apparatus that individually separates and cuts a plurality of bottomed cylindrical product parts of a synthetic resin body continuously molded by protruding to a single side via a flat connecting part, A plurality of dies having a diameter slightly larger than the outer diameter of the upper end of the product part and arranged corresponding to the arrangement of each product part, and a peripheral edge of the product part located opposite to the die and movable up and down. a main body portion that presses and clamps the connection portion of the die with the upper end of the die;
a stripper plate having a short cylindrical pressing part hanging down to push down the connecting part to the outside of the die;
A synthetic resin product manufacturing device comprising: a punch that slidably passes through the stripper plate.