JPS59192536A - Primary product for blow molded bottle - Google Patents

Abstract

PURPOSE:To mold a bottomed cylinder, by injection molding an uppermost ring having a mating cylindrical piece at the lower part, an intermediate ring having mating cylindrical pieces at the upper and lower parts, and a bottomed ring having a mating cylindrical ring at the upper part and a domed bottom, the rings having clear different colors, mating the rings, and welding them integrally. CONSTITUTION:A uppermost ring 20 has at the top end a finish section 4 via a flange, the finish section 4 having a helical thread 1 on the circumference. The upper half section 20a below the flange is twice as thick as the lower half section 20b that is a mating cylindrical piece, and a circumferential step (c) is formed between the inner circumference of the upper half section 20a and the inner circumference of the lower half section 20b. An intermediate ring 21 is made up of an upper mating cylindrical piece 21a, an intermediate section 21b and a lower mating cylindrical piece 21c that are equal in length. A bottomed ring 22 has an upper half mating cylindrical piece 22a. The upper half mating cylindrical piece 22a is mated firmly into the lower half section 20b of the uppermost ring 20 or the lower part 21c of the intermediate ring 21, and the connected sections are welded integrally by means of ultrasonic welding or the like to form a bottomed cylinder.

Description

[Detailed Description of the Invention] The present invention performs stretch blow molding using a bottomed cylindrical body formed by fitting a plurality of colored transparent rings of color W into each other at one end and a lower end. This relates to a single primary molded product with a horizontal striped pattern in multiple colors, and the object is to obtain an enlarged product with a horizontal striped pattern in various colors by using a small number of pieces of different colors.

Nowadays, synthetic resin containers with extremely rich colors in appearance are often used in containers for cosmetics, etc., mainly to enhance the design effect, but most of them are The design was still unsatisfactory because the colors were academic and the color tone did not change.

For example, even if an attempt was made to make a multi-colored horizontal striped pattern appear on the filler, there were many inconveniences in the conventional blow molding method used when molding the filler made of synthetic resin. That is, in conventional blow molding, all the colors to be obtained are required, and the boundaries between each color are not clear, so the sharpness is lost, so to speak, and furthermore, it is difficult to set each color during molding.

The present invention relates to a primary molded product used for blow molding extension having a multicolored horizontal striped pattern devised to eliminate the above-mentioned conventional drawbacks and inconveniences. An upper ring, an intermediate ring with fitting cylinder pieces on the upper and lower parts, and a bottomed ring with a fitting cylinder piece on the upper part and a hemispherical bottom are injection molded, and they are mutually colored. The above-mentioned rings of different colors and transparency are fitted vertically and welded together to form a cylinder shape with a bottom.

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

First of all, FIG. 1 shows a piece P which is a next-molded product, in which a plurality of colored transparent rings 2 injection-molded from thermoplastic synthetic resin such as polyethylene terephthalate resin are placed on top of each other. The lower part is fitted into the lower part to form a bottomed cylindrical body P2.

FIG. 5 is a perspective view showing each ring 2 individually before being molded into a bottomed cylinder, with the top ring 2
0, an intermediate ring 21, and a bottomed ring 22.

The desirable shape of one embodiment of these rings 2 is as follows:
As shown by the imaginary line in FIG. 5, the uppermost ring 20 has a bottle mouth part 4 connected to its upper end via a flange part, and an ovary 1 is provided around the outer periphery of the bottle mouth part 4. , and the wall thickness a of the ten cliff part 20a below the flange is the lower) 1' part 2 which becomes the fitting cylinder piece.
It is molded to twice the wall thickness a° of 0b, so the upper half 2
A step 20c is formed in the circumferential direction at the center of the inner peripheral surface between the inner inner surface 0a and the inner circular surface of the lower half portion 20b.

Further, the length of the intermediate ring 21 is one and a half times the length of the uppermost ring 20 in the illustrated embodiment, and is divided into equal parts.
1 part fitting cylinder piece 21a, center part 21b, lower fitting cylinder piece 2
Let it be 1c.

The wall thickness of the central portion 21b is equal to the wall thickness a of the -L half 20a of the uppermost ring 20, and the inner diameter and outer diameter are also equal to that of the -L half 20a. , the inner diameter corresponds to
The inner diameter of the two half parts 20a and the outer diameter are equal to the inner diameter of the lower half part 20b of the uppermost ring 20, and the wall thickness is also equal to the inner diameter of the lower half part 20b of the uppermost ring 20.
The thickness is equal to the wall thickness a', and it fits tightly into the lower half part 2Ob. The lower fitting cylinder piece 21c of the intermediate ring 21 has an inner diameter equal to the outer diameter of the upper fitting cylinder piece 21a, and an outer diameter of the lower fitting cylinder piece 21c of the middle ring 21.
b is equal to the outer diameter, and the wall thickness a is equal to that of the upper fitting cylinder piece 21a.
has.

Therefore, a step 21d is formed on the outer circumferential surface between the upper fitting cylindrical piece 21a and the central part 21b of the intermediate ring 21, and a step 21d is formed on the inner circumferential surface between the central part 21b and the lower fitting cylindrical piece 21c.
e is formed, and the intermediate ring 21 is connected to its upper fitting cylinder piece 2.
The uppermost ring 20 is connected to the uppermost ring 20 by tightly fitting the lower half portion 20b of the uppermost ring 20 into the lower half portion 20b.

Next, the bottomed ring 22 has almost the same length as the top ring 20 and has a flush inner surface, but the lower half 22b has an approximately spherical roundness, and the upper half fits into the bottom ring 22. Cylinder piece 22a
This wall thickness a is equal to the wall thickness a of the uppermost ring upper half 20a, and the upper half fitting 1 fitting cylinder piece 22
The outer diameter of a is the lower fitting cylinder piece 21c of the intermediate ring 21.
is equal to the inner diameter of

Therefore, the bottomed ring 22 has its upper half fitting cylindrical piece 5-22a tightly fitted into the lower half 20h of the uppermost ring 20 or the lower half 21c of the intermediate ring 21. It is connected to the ring 21, and the connecting portions of each ring 2 are welded and integrated by means such as ultrasonic bonding, and are formed into a bottomed cylindrical shape.

A plurality of transparent rings 2G having such a structure are each decorated with an appropriate color, and each fitting cylinder piece is fitted into each other at one end and the lower end, so that the outer surface is flush with each other. A bottom cylindrical body and the like are formed to obtain a piece P which is a next molded product.

Here, since the ring 2 is a colored transparent body as described above, the color of the first ring 20 appears alone on the uppermost ring upper half 20a, and the color of the uppermost ring 20 appears alone on the uppermost ring lower half 20b. Since the intermediate ring upper part 21a is fitted, a composite neutral color of the uppermost ring 20 and the intermediate ring 21 appears.

Similarly, the intermediate ring center part 21b has the color of the intermediate ring 21 alone, the intermediate ring lower part 21c has the intermediate color of the intermediate ring 21 and the bottomed ring 22, and the bottomed ring lower half part 22b has the bottomed ring 22 alone. In this Example 6, by combining rings 2 of three different colors, a horizontal striped pattern of three different colors is created on piece P.
This makes it possible to give

Moreover, in this case, it is also possible to directly connect the top ring 20 and the bottomed ring 22, and three different color tones can be obtained with two rings 2 of different colors.
More color tones can be investigated by increasing the number of intermediate rings 21, and in the above embodiment, the upper half 20a and lower half 20b of the uppermost ring 20, the upper fitting cylinder piece 21a of the intermediate ring 21 and the center 21b, the lower fitting cylinder piece 21c, etc. are all set to the same length, so the width of each color stripe is uniform, but if you change these lengths appropriately, you can select a thin line or a wide line. Let's get it.

Next, FIG. 3 shows another embodiment of the present invention, -
The next molded piece P is a piece base P having a cylindrical shape with a bottom,
Welding the bottomed cylindrical body P2 to the exterior.)
Consisted of.

- of the piece base P1 injection-molded with thermoplastic synthetic resin such as polyethylene terephthalate resin
A flange is provided on the outer periphery of the end portion, and a thread 1 for the cap member 1F is provided on the outer periphery above the flange.

On the other hand, the bottomed cylinder P is almost the same as the embodiment shown in FIG. 1, and has an inner diameter similar to that of the piece base P.

This differs from the embodiment shown in FIG. 1 in that there is no flange or bottle opening at the upper end of the top ring 20.

Then, below the flange of the piece base PI, the most partial ring 20, the intermediate ring 21, and the bottomed ring 22 are fitted and welded while fitting the fitting cylindrical pieces into each other in this order to form the piece P. be.

Now, if above, the sticky piece P is heated to a temperature suitable for blow molding and fitted into a mold, and after stretching the stretching bottle in the axial direction or at the same time, pressure fluid is injected into the piece P and blow molding is performed. However, the molding method of the present invention produces a multicolored horizontally striped tank body.

That is, the enlargement shown in FIG. 2 is obtained by stretch blow molding the piece P shown in FIG. It is necessary to securely weld each piece 2 to each other.

The increase shown in FIG. 4 is obtained by stretch-blow molding the piece P shown in FIG. The piece P is stretched integrally with the body Pa-a, and the piece P is formed into the enlarged body 3. Therefore, each of the rings 2, each having several incorporated colors, is stretched to form several kinds of horizontal striped patterns that increase in size and have good freshness, and the piece base P, which becomes the inner shell PH-a,
If it is given a cloudy color, it will be possible to change the color of the outer shell PJL-a, and if it is transparent, it will be possible to give it depth.

When using the piece P shown in FIG. 1, the molding operation of the piece itself is simple and the number of parts can be reduced.
When using piece P shown in Figure 3, it has a double-walled structure, so when it is molded into an enlarged product, it has good resistance to contents, strength, and color clarity (as mentioned above, the piece has a cloudy color). It will be better in 9- cases).

- As explained above, according to the primary molded product of the present invention, a multi-colored horizontal striped pattern can be imparted to a synthetic resin extension by effectively stitching together a small number of pieces of different colors. I can do it.

Therefore, it is useful for reducing the cost of pigments, materials, etc., and since the boundaries between each color are extremely clear, it is possible to obtain an excellent design and beauty for guests, especially in cosmetic bottles and the like.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional view of a primary molded product showing an embodiment of the present invention, and FIG. 2 is a half-sectional view of an enlarged product obtained by stretch-blow molding the same.
Fig. 3 is a half-sectional view of a primary molded product showing another embodiment;
The figure is a half-sectional view of the enlarged body which has been stretched and treated with acid, and FIG. 5 is a cutaway perspective view of each ring. DESCRIPTION OF SYMBOLS 1... Thread, 2... Ring, 3... Top ring, 21... Intermediate ring, 22... Bottomed ring, 3
... Bottle body, 410- ... Bottle opening, P... Piece, PI... Piece base, PL... Bottomed cylinder, PHa... Inner shell, P,
1-a...Outer shell 1ala゛...Thickness of the ring. Inventor: Hiroshi Ishii Applicant: Yoshino Kogyo Co., Ltd. Representative: Yatabe Yoshino

Claims (2)

[Claims] (1) A colored transparent two-part ring with a fitting cylinder piece provided at the lower part; a colored transparent intermediate ring different from the uppermost ring, and a fitting cylinder piece provided in the lower part and the bottom part; A blow-molded extension formed by providing fitting cylinder pieces in two parts, making the lower part almost hemispherical, and at least a colored transparent bottomed ring different from the intermediate ring, which are fitted and welded vertically to each other to form a knotted shape. Primary molded product. (2) a colored transparent lowermost ring with a fitting cylinder piece provided at the lower part; a colored transparent intermediate ring different from the uppermost ring, with fitting cylinder pieces provided in the -1 second part and the lower part; A bottomed cylindrical shape that is injection molded by providing a fitting cylindrical piece on the upper part, making the lower part almost hemispherical, and fitting at least the intermediate ring and a colored transparent bottomed ring different from the intermediate ring into two parts. A primary molded product made by blow molding, which is made by welding the exterior to a base.