JPH09300440A - Manufacturing method of plastic bottle with handle - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a method for manufacturing a plastic bottle with a handle, by which a plastic parison can be blow-molded and at the same time a handle body can be integrally attached and molded to a bottle body. SOLUTION: The bottomed cylindrical parison has a spigot portion held by a parison holder to heat the parison to a molding temperature, and a pin protruding from a handle body support arranged adjacent to the parison holder, The grip body is fitted into a hole formed in one end of the grip body to support the grip body, and then the half mold is closed so as to wrap the parison and the grip body, and the mold butt is abutted. A method for producing a plastic bottle with a handle, characterized in that the other end of the handle body is sandwiched and fixed by a projection opposite to each other, and then a pressure fluid is blown from the plug portion of the parison to perform blow molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a plastic bottle with a handle, and more particularly, to manufacturing a plastic bottle with a handle capable of blow-molding a plastic parison and simultaneously attaching and molding the handle body to the bottle body. Regarding the method.

[0002]

2. Description of the Related Art Conventionally, as a simultaneous blow molding method in which a handle body is integrally attached to a bottle body made of polyester resin, the applicant has disclosed, for example, in Japanese Patent Laid-Open No. 63-95931, a parison and a handle body separately. A parison that was molded, held on a holding mandrel and heated to the molding temperature,
The handle body fitted to the holding pin is arranged at a predetermined position, and in this state, a method for manufacturing a bottle with a handle has been already proposed, in which both are simultaneously conveyed and arranged in a blow molding die, and then blow molding is performed. Further, in Japanese Unexamined Patent Publication No. 4-1020, the parison and the grip body are separately molded, and the heated parison is arranged between molding halves and provided on the mating surface of the half dies. A method of manufacturing a bottle with a handle is also proposed, in which the handle is temporarily fixed to the handle fitting groove and then blow molded.

However, the former method of manufacturing a bottle with a handle is unstable because one end of the handle body is held at one point by the handle body holding pin, and the latter bottle with a handle is unstable. In the manufacturing method of (1), a handle body mounting head that fits in the half-fitting groove is required to properly and temporarily mount the handle body in the grip-body fitting groove provided on the mating surface of the half-mold type. In addition, it is necessary to use a two-stage system in which the moving mechanism of the mounting head and the alignment mechanism are separated in order to improve the supply ability of the grip body, and therefore, the installation space of the molding device must be increased. There is a problem of not getting it.

[0004]

DISCLOSURE OF THE INVENTION The present invention is to solve the above-mentioned problems, and its gist is to arrange a plastic parison heated to a molding temperature and a grip body in a half mold for blow molding. Then, in the method for producing a plastic bottle with a handle, in which a handle body is integrally attached to the bottle body by blowing a pressure fluid into the parison and blow molding the parison, the parison holder of the bottomed cylindrical parison is provided. The parison is heated to the molding temperature while being held at the same time, and the pin projecting from the handle body support device disposed adjacent to the parison holder is fitted into the hole formed at one end of the handle body to hold the handle. After supporting the body, the half mold is closed so as to wrap the parison and the handle body, and the other end of the handle body is fixed by sandwiching the other end of the handle by the projection opposite to both butts of the mold die. Shishika Later, a method for producing a plastic bottle with a handle, characterized in that the blow molding by blowing the pressurized fluid from the mouth part of the parison.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a side view of the parison holder and the handle support according to the present invention, in which a part thereof is omitted.
Is a schematic side sectional view showing an arrangement state of a parison and a handle body in a blow molding die according to the present invention, and FIG.
The X-ray arrow cross section is shown in an enlarged sectional view, and FIG. 4 is a perspective view of the plastic bottle with a handle obtained by the present invention.

According to the present invention, a plastic parison B heated to a molding temperature and a handle A-2 are placed in a blow molding die C which is divided in half, and a pressure fluid is blown into the parison B for blow molding. Thus, in the method of manufacturing a plastic bottle with a handle, in which the handle body A-2 is integrally attached to the bottle body A-1, the stopper a of the bottomed cylindrical parison B is
1 is held in the parison holder 1 to heat the parison B to the molding temperature, and the pin 23 projecting from the handle body support 2 arranged adjacent to the parison holder 1 is attached to one end of the handle body A-2. After fitting into the hole portion A-22 formed in the portion A-21 to support the handle body A-2, the parison B and the handle body A-2 are supported.
The mold halves C-1 and C-2 are closed so as to wrap around, and the other end A- of the handle body A-2 is provided by the projection C1 that is provided opposite to both butts of the mold C. 23 is sandwiched and fixed, and thereafter, a pressure fluid is blown from the plug portion a1 of the parison B for blow molding.

According to the present invention described above, one end portion A-21 of the grip body A-2 is supported outside the molding die C, and the other end portion A-23 is clamped by the projection C1 provided in the molding die C. Since it can be securely and stably fixed,
Handle A-2 by blow pressure applied during blow molding
It is possible to obtain an effect that troubles such as breakage of the attachment part of the handle body A-2 are eliminated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is a side view with a part omitted in FIG.
As shown in the schematic side sectional view of FIG.
1. A parison holder 1 having a mandrel 12 rotating on 1 and a supporting arm 22 on a supporting base 21 adjacent to this.
The handle body support 2 having the pin 23 at the tip thereof is arranged.
Then, the mouthpiece a1 of the inverted bottomed cylindrical parison B is a1.
Is held on the mandrel 12 of the parison holder 1,
While heating the parison B to the molding temperature while rotating it in the direction of the arrow, the pin 23 protruding from the tip of the handle body support 2 arranged adjacent to the parison holder 1 is attached to one end of the handle body A-2. The handle body A-2 is attached to the handle body support tool 2 by fitting the A-21 (base end portion of the upper mounting piece of the handle body A-2) into the hole portion A-22 which is bored upward. Support upside down.

After that, the parison B and the handle A-
Half mold C-1 and C- of the molding die C so as to wrap around 2 and
2 are butt-closed, and as shown in the enlarged sectional view of FIG.
Protrusions C1 protruding from both of the half molds C-1 and C-2
The other end A-23 of the handle A-2 by C1 (handle A
-2 lower part of the lower mounting piece) is sandwiched and fixed,
At this time, one end A-21 and the other end A of the handle body A-2
The insert dies C2 and C2 attached to both the half halves C-1 and C-2 are butt-disposed between them and -23.

Then, as shown in FIG. 2, if a pressure fluid is blown from the mouth plug portion a1 of the parison B in the direction of the arrow and blow molding is carried out in the usual manner, the bottle body A-1 to which the handle body A-2 is attached is attached. At the same time that the concave portion a2 is formed, the upper and lower end portions A-21 and A-23 of the handle body A-2 are formed in the concave portion a2.
Is partially embedded and fixed. Then, the molding die C is cooled and then opened, and the handle body support tool 2 is lowered to remove the plug portion a.
If 1 is pulled out from the mandrel of the parison holder 1 and taken out, the plastic bottle with a handle shown in the perspective view of FIG. 4 is obtained.

The one end portion A-21 of the handle body A-2 applied to this embodiment has a hole portion A extending downward from above.
-22 are drilled at two places and the other end A-23
On both sides of the mold, half molds C-1 and C are used when the blow mold is closed.
-2, the holding grooves A-24 and A-24 for receiving the protrusions C1 and C1 protruding from both sides are formed thinly.
The secondary effect that the weight of the bottle A is reduced while maintaining the required strength is also obtained.

According to the present invention, the one end portion A-21 of the handle body A-2 is supported by using the simple handle body support tool 2 arranged from outside the molding die C, and the handle body A-2 is also supported. Since the other end A-23 can be securely and stably fixed by being sandwiched by the projection C1 provided in the molding die C, it is easily caused by the blow pressure applied during blow molding as in the conventional case. The trouble that the handle A-2 and the attachment part of the handle A-2 are damaged is eliminated, and the handle A-2
Is a hole A-22 formed at one end A-21 thereof,
It is also possible to reduce the weight due to the holding groove 24 formed at the other end A-23.

[0013]

Since the present invention has the above-described structure, the following effects can be obtained. That is, according to the present invention, one end portion of the handle body is supported outside the molding die, and the other end portion is sandwiched by the protrusions provided in the molding die to securely and stably fix the grip body. As a result, the blow pressure applied during blow molding eliminates problems such as damage to the handle body and the handle body attachment portion, and the weight of the bottle can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of the parison holder and the handle body holder according to the present invention, in which some parts are omitted.

FIG. 2 is a schematic side sectional view showing an arrangement state of a parison and a handle body in a blow molding die according to the present invention.

3 is an enlarged cross-sectional view showing a cross section taken along line XX of FIG.

FIG. 4 is a perspective view showing a plastic bottle with a handle obtained by the present invention.

[Explanation of symbols]

 1 parison holder 11 parison holder 12 mandrel 2 handle support 21 support stand 22 support arm 23 pin A bottle A-1 bottle body a1 spout part a2 concave part A-2 handle body A-21 one end part A- 22 Hole A-23 Other end A-24 Clamping groove B Parison C Mold D C-1 Half mold C-2 Half mold C1 Protrusion C2 Nested mold

Claims (1)

[Claims] 1. A plastic parison heated to a molding temperature and a handle are placed in a half blow molding die, and a pressure fluid is blown into the parison to perform blow molding, whereby the handle is attached to the bottle body. In the method of manufacturing a plastic bottle with a handle that is integrally attached, a handle body that holds the cap of the bottomed tubular parison in a parison holder to heat the parison to a molding temperature, and is arranged adjacent to the parison holder. After the pin protruding from the support is fitted into the hole formed at one end of the handle body to support the handle body, the half mold is closed so as to wrap the parison and the handle body. Then, the other end of the handle body is sandwiched and fixed by the projections provided opposite to each other of the butts of the molding die, and thereafter, the pressure fluid is blown from the plug portion of the parison for blow molding. You Manufacturing method of plastic bottle with handle.