JPH05112356A - Container and manufacture thereof - Google Patents

Abstract

PURPOSE:To make fitting and fixing of a frame body to a container main body executable easily without requiring much time, while ensuring strength much stronger than that by a conventional method, and to reduce costs therefor. CONSTITUTION:A container main body 1 made of thermoplastic plastic such as polyester is covered almost all over, except a mouth part 2 thereof, in the direction of its height with a frame body 5 made of a single part, and the frame is fitted and fixed to the container main body. The container is manufactured by a series of processes including a first process for forming a parison, a second process for covering the parison from its lower part with the frame body, a third process for covering the frame body held to the parison with a blow mold and for drawing the parison in its lengthwise direction with a drawing rod inserted therein, while drawing the same in its breadthwise direction with air blown into the parison and a fourth process for taking the molded article out by opening a lip mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container suitable for accommodating, for example, a cosmetic solution and a method for producing the container.

[0002]

2. Description of the Related Art As a container as described above, there is known a container in which a frame body is fitted and fixed so as to cover a surface of a container body made of a thermoplastic material such as polyester, except for a mouth portion, over substantially the entire height.

[0003]

By the way, in the case of molding a container as described above, after molding the container body, a frame body composed of two or more parts is formed on a part of the surface other than the mouth of the body, for example, in the upper and lower parts. Although it will be fitted and fixed over almost the entire height from both directions, it is necessary to fix the two separately molded members (container main body and frame) with an adhesive agent, etc., and it will take a long time to fix and the fixation will peel off. It was easy and weak in strength. In addition, since the frame body requires more than two parts, there are various problems in that the fixation of these frame bodies to the container body must be carefully worked out in order to make the appearance beautiful, and the cost increases. It was

In view of the above, the present invention solves the above-mentioned conventional problems, and the fitting and fixing of the container body and the frame can be easily performed without spending time, and the strength is higher than the conventional one. It is an object of the present invention to provide a container that can be secured and can reduce the cost and a manufacturing method thereof.

[0005]

In order to achieve the above object, in the container according to the present invention, a frame body made of one part has almost the entire surface except a mouth portion of a container body made of a thermoplastic such as polyester. It is fitted and fixed integrally by covering it. If the container body is a thermoplastic, not only polyester but also polyethylene,
It may be polystyrene, polypropylene, polyvinyl chloride, acrylic resin or the like. The surface of the container body, which is not covered with the frame, other than the mouth portion projects outward from the frame. The surface of the frame body and the surface of the container body are continuous without any uneven portion. The frame body can be made of various materials, but it is particularly preferable to make it of one selected from plastic, metal and wood.

The method of manufacturing the container according to the present invention is
First step of injection molding a bottomed parison with a positioning locking part near the lower end of the lip mold by an injection molding machine, and after cutting the gate of the parison, lock the locking part at the upper opening The parison in a state in which the frame body having the positioning locking portion is raised by the actuating member and suspended by the lip type is covered from below by the frame body, and the locking portion of the frame body is engaged with the locking portion of the parison. The second step of stopping and covering the frame locked with the parison by a blow mold having a molding recess on the inner surface, inserting a stretch rod into the parison to stretch the parison in the longitudinal direction, and air in the parison. And a fourth step of drawing the parison from the frame body in the lateral direction having the molding recess of the blow mold and opening the lip mold to take out the molded product. In the second step, the frame is positioned and stored in the heating pot with the upper opening,
It may be adapted to be lifted by an actuating member via the pot.

[0007]

[Function] As described above, the frame body is made into one part.
Since the frame body made of parts is fitted and fixed integrally by covering a part of the surface of the container body other than the mouth portion over almost the entire height, the fitting and fixing does not take time unlike the conventional case.
The strength is higher than the conventional one, and the cost can be reduced.

[0008]

1 and 2 show a container according to an embodiment of the present invention. This container has a quadrangular cross section other than the mouth portion 2 of the container body 1. The container body 1 is made of, for example, polyester, and the body portion 3 not covered with a frame body, which will be described later, has a shape protruding outward from the frame body. The surface of the body portion 3 and the surface of the frame body are continuous without any uneven portion. Reference numeral 5 denotes a frame body, which is a single part made of styrene-based plastic (for example, ABS resin), and includes a surface of the shoulder portion of the container body 1 in contact with the mouth portion 2, a peripheral surface of the bottom portion, and The surfaces of the four corners of the container body are vertically covered and integrally fixed. Reference numeral 6 is a screw portion provided in the mouth portion 2.

FIG. 3 shows another type of container having different shapes. This container has an elliptical cross section, and other configurations are similar to those of the container. Therefore, the same parts will be denoted by the same reference numerals and the description thereof will be omitted. As described above, various shapes can be considered as the shape of the cross section, and the shape may be other than those mentioned here, for example, a circular shape or the like.

Of the above-mentioned two containers, a method for manufacturing a container having a rectangular cross section will be described below with reference to the drawings.

FIG. 4 is a schematic plan view of a biaxial stretch blow molding machine 10 for molding the above-mentioned container. The injection molding station 11, the gate cutting and heating station 12 of the parison, and the stretch blow are shown in the rotational direction indicated by the arrow. station
13 and take-out station 14.

The molding process in each station will be described with reference to FIG. First, in the injection molding station 11, as shown in FIG. 5, the bottomed parison having the tapered positioning locking projections 23 (see FIG. 6) near the lower ends of the lip dies 17 and 18 by the injection molding machine 16 is provided. 24 injection molding. After molding, the center pins 19 of the lip molds 17 and 18 are removed, and the parison molds 20 and 21 are opened, so that the parison 24 has the mouth part 2 of the container body 1 with the lip mold 17,
It is suspended in 18 and is sent to the parison gate cutting and heating station 12 in this state. As shown in FIG. 6B, a plurality of locking projections 23 of the parison 24 are provided in the circumferential direction of the parison 24 (four in this example).

In the gate cutting and heating station 12 of the parison, the gate of the parison 24 is first cut. Figure 6 (A) shows the parison after the gate has been cut.
24 states are shown. Next, as in the case of the parison 24, injection molding is separately performed, and a plurality of locking recesses 26 (four in this example) are provided at the upper end opening for locking the fitting by engaging with the locking projections 23 of the parison 24 by press fitting. The frame body 27 as the inserted insert part is positioned and stored in the heating pot 28 having the upper end opening as shown in FIGS. 7 (A) and 7 (B). The positioning is performed by a positioning member (not shown) in the heating pot 28, for example, so that the locking concave portion 26 and the locking convex portion 23 correspond well.
Next, the heating pot 28 accommodating the frame 27 is raised by the cylinder 30, and the parison 24 suspended by the lip molds 17 and 18 is covered with the frame 27 from below as shown in FIG. 8 (A). ,
The locking concave portion 26 of the frame 27 is press-fitted into the locking convex portion 23 of the parison 24 to lock them. After locking, the heating pot 28 is lowered by the cylinder 30 as shown in FIG. 8 (B). As a result, the frame 27 is suspended from the parison 24. Then, in this state, it is sent to the next stretch-blow station 13. The reason why the frame 27 is housed in the heating pot 28 and raised is that the frame 27 can be raised at an accurate position and the parison 24 is heated.

In the stretch-blow station 13, as shown in FIG. 9 (A), a molding recess 32 for forming the body 3 of the container,
33 covers the frame body 27 locked to the parison 24 by the blow molds 35 and 36 and the bottom mold 37 provided on the inner surface, and the extension rod 38 is inserted into the parison 24 as shown in FIG. twenty four
Is stretched in the vertical direction, and air is blown into the parison 24 to stretch the parison 24 from the frame 27 in the lateral direction in which the molding recesses 32, 33 of the blow molds 35, 36 are provided. After this biaxial stretching,
Open the blow molds 35 and 36 and the bottom mold 37. Then, it is sent to the next take-out station 14.

At the take-out station 14, FIG.
From the state of (A), the lip molds 17 and 18 are opened and the molded product 40 is dropped and taken out as shown in FIG.

The above four stations 11, 12, 13, 14
One cycle of molding is completed by each step in (1), and a large number of containers as shown in FIGS. 1 and 2 can be obtained by continuously performing such a cycle.

In this example, the surface of the body 3 of the container body 1 and the surface of the frame 27 are formed so as to be continuous without any uneven portion, but this is not necessarily the case in the present invention. Also,
Although the locking convex portion 23 and the locking concave portion 26 which are fitted by press fitting are given as the locking portions, the detailed configurations of these can be variously modified without changing the gist.

[0018]

According to the first aspect of the present invention, since it has the above-described structure, it is possible to easily carry out the fitting and fixing of the container body and the frame body without taking time as in the conventional case. Further, it is possible to secure the strength higher than that of the conventional one. Furthermore, since the frame body is made up of only one part, it is possible to make a beautiful and seamless product and reduce costs.
According to the second aspect of the present invention, the form of the container body with respect to the frame body can be accented, and the closeness between the frame body and the container body can be increased. According to the third aspect of the present invention, the surface of the frame body and the container body are free from any irregularities, and the texture is good, the appearance is beautiful, and the design value is high. In the invention of claim 4, the range of selection of the material of the frame body is further expanded, and the frame body can be made of a material suitable for the material and color of the container body.

According to the invention of claim 5, the container of claim 1 can be produced quickly and easily. Moreover, since the biaxially stretch blow molding is used, the material of the container body may be thin plastic, and the material cost is low. According to the sixth aspect of the present invention, the frame body can be raised more accurately, and the dimension after molding becomes accurate.

[Brief description of drawings]

FIG. 1 is a perspective view of a container showing an embodiment of the present invention.

FIG. 2 is a vertical sectional front view of the same.

FIG. 3 is a perspective view of another type of container having different shapes.

FIG. 4 is a schematic plan view of a biaxial stretch blow molding machine.

FIG. 5 is a vertical cross-sectional front view of the above injection molding station.

6A is a partial cross-sectional view showing a state in which a gate is cut after parison molding, and FIG. 6B is a plan view of a parison portion.

7A is a partial cross-sectional view showing a state in which a frame is housed in a heating pot, and FIG. 7B is a plan view of FIG.

FIG. 8A is a partial cross-sectional view showing a state in which a heating pot accommodating a frame is raised by a cylinder, and the locking recess of the frame and the locking projection of the parison are fitted and locked by press fitting. FIG. 1B is a partial cross-sectional view showing a state where the heating pot is lowered by the cylinder after locking.

FIG. 9A is a partial cross-sectional view showing a state in which a frame that is engaged with a parison by a blow mold is covered, and FIG. 9B is a partial cross-sectional view showing a state in which blow molding is performed.

10A is a partial cross-sectional view showing a state after blow molding and before taking out, and FIG. 10B is a partial cross-sectional view showing a state in which a lip mold is opened and a product is dropped and taken out.

[Explanation of symbols]

 1 Container Main Body 2 Mouth 3 Body 5 Frame 6 Screw 10 Biaxial Stretch Blow Molding Machine 11 Injection Molding Station 12 Parison Gate Cutting and Heating Station 13 Stretching Blow Station 14 Ejection Station 16 Injection Molding Machine 17, 18 Lip Mold 20,21 Parison type 23 Locking convex part 24 Parison 26 Locking concave part 27 Frame 28 Heating pot 30 Cylinder 32,33 Molding concave part 35,36 Blow mold 38 Stretching rod 40 Molded product

Front page continuation (72) Inventor Hiroyuki Naruse, 3-6-1 Tamagawa, Setagaya-ku, Tokyo Inside High-voltage Kako Co., Ltd. (72) Inventor Sadao Kubo 3-6-1, Tamagawa, Setagaya-ku, Tokyo Inside High-voltage Kako Co., Ltd.

Claims (6)

[Claims] 1. A container in which a frame made of one part is fitted and fixed integrally so as to cover a part of the surface of the container body made of a thermoplastic material such as polyester other than the mouth part over substantially the entire height. 2. The container according to claim 1, wherein the surface of the container body, which is not covered with the frame body, except the mouth portion projects outwardly from the frame body. 3. The container according to claim 2, wherein the surface of the frame body and the surface of the container body are continuous without any uneven portion. 4. The container according to claim 1, wherein the frame body is made of one selected from plastic, metal and wood. 5. A first step of inject-molding a bottomed parison having a positioning locking portion at a position near the lower end of the lip mold by an injection molding machine; The parison in the state of being suspended by the lip type is lifted by the actuating member to raise the frame body having the positioning locking portion to be locked to the stop portion from below and the locking portion of the frame body is covered with the parison. The second step of locking the locking part, and covering the frame locked with the parison with a blow mold having a molding recess on the inner surface, inserting an extension rod into the parison and extending the parison in the longitudinal direction. , A third step of blowing air into the parison to laterally stretch the parison from the frame body with a blow mold molding recess, and a fourth step of opening the lip mold and taking out the molded product. Claim 1 How to make the above container. 6. The method for producing a container according to claim 5, wherein in the second step, the frame is positioned and housed in a heating pot having an upper end opening, and is raised by an operating member through the pot.