JPH041021A - Preparation of handled bottle - Google Patents

Abstract

PURPOSE:To efficiently prepare a handled bottle by a method wherein a bottomed cylindrical parison is molded by an injection mold and adjusted to molding temp. to be fed in a blow mold and a handle body prepared in a separate process is arranged in the blow mold and the blow mold is closed to perform blow molding. CONSTITUTION:A molten synthetic resin is injected in a cavity from an extruder through an injection nozzle 23 and cooled by an injection mold 2 to mold a parison 6. The parison 6 stopped at a predetermined position is fitted in a heating hole 31 from below so as to be covered with said hole 31. The parison 6 adjusted to molding temp. is fed in a blow mold 4 after a temp. control mold 3 falls and a handle body 7 prepared in a separate process is arranged to an opened split mold 41 by a handle inserting arm 8. By fitting the handle body 7 in one of split molds as mentioned above, the handle body 7 can be arranged without being obstructed by the movement of the parison 6 going in and out of the blow mold and that of a product bolt 62 and, therefore, extremely efficient effect is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a bottle with a handle by an in-line injection blow molding method.

(Prior art) Conventionally, handles have been manufactured using an in-line injection blow molding method in which a cylindrical parison with a bottom is molded using an injection mold, then transported into a temperature control mold to adjust the molding temperature, and then blow molded in a blow mold. In order to manufacture a bottle with a handle, a technique has been proposed in which cavities for both a parison and a handle are formed in an injection mold, and the cavities are transported into a blow mold while maintaining their relative position, and then blow molded. was. (Unexamined Japanese Patent Publication No. 63-9
(No. 5931) (Problems to be Solved by the Invention) In the conventional method described above, the parison and the handle body are injection molded in parallel and transported, which makes the injection device complicated and makes it difficult to match the injection timing of both. There were problems in that it was difficult to adjust the molding temperature of the parison alone, and that it was difficult to adjust only the parison to the molding temperature.

(Means for Solving the Problems) The present invention has been made to solve the above problems, and its gist is that a cylindrical parison with a bottom is molded using an injection mold, and then transported into a temperature control mold. Adjust the parison to the molding temperature, then transport the parison into the blow mold, place the handle body manufactured in a separate process into the blow mold, close the blow mold, and perform blow molding to integrate it with the handle body. This is a method for producing a bottle with a handle, which is characterized in that the bottle with a handle can be manufactured extremely efficiently using an in-line injection blow molding method.

Description will be given below based on the attached drawings.

FIG. 1 is a schematic plan view showing an example of an apparatus for carrying out the method for manufacturing a bottle with a handle according to the present invention, and FIG.
-■ sectional view, FIG. 3 is a sectional view taken along ■--■ of FIG. 1, FIG. 4 is a plan view of only the vicinity of the blow mold, and FIG. 5 is a side view of the handle body.

1 is a circulation transfer means, and an injection mold 2 arranged in an annular shape
, temperature control mold 3, blow molding mold 4 and discharge station 5
It is designed to move sequentially through 4 fill locations.

The circulation transfer means 1 is attached to a support plate 13 together with a drive device 11, for example, and can be in the form of a disk that is intermittently rotated by the drive device 11. A required number of neck molds 12 are attached to the outer peripheral end of the disk. These are provided for each stopping position. This neck type 12 is the neck part 61 of the parison 6.
The robot holds and transports the robot to each stop position. As shown in FIG. 2, the neck mold 12 forms a part of the injection mold together with the outer mold 21 and the core mold 22 at the position of the injection mold 2, and defines the shape of the parison neck 61. Also, at the position of the blow molding mold 4, the mold is closed in cooperation with the half molds 41 and 42. Also, at the discharge station 5, the neck mold 12 is opened to discharge the product bottle 62.

In the present invention, the injection mold 2 defines the shape of the parison 6 from a divisible outer mold 21, a core mold 22 that defines the inner surface of the parison 6, and a neck mold 12 that defines the shape of the threaded portion of the neck 61, etc. A mold cavity is constructed.

Then, the molten synthetic resin is injected into the cavity from an extruder outside the system through the injection nozzle 23, and is then injected into the injection mold 2.
The parison 6 is molded by cooling.

Next, the core mold 22 is pulled out from the parison 6, the outer mold 21 is opened, and the circulation transfer means 1 is rotated, so that the parison 6 is moved to the position of the temperature control mold 3 while being held by the neck mold 12.

As shown in FIG. 3, the temperature control mold 3 is movable up and down, has a heating hole 31 that wraps around the outside of the parison 6, and is regulated to a predetermined temperature by a heater. Then, the parison 6 stopped at a predetermined position is fitted from below so as to cover the heating hole 31.

The temperature of the temperature control mold 3 must be set so that the parison 6 reaches the molding temperature in the next blow molding step. For example, when polyethylene terephthalate is used as the synthetic resin, it is necessary to control the temperature to about 100°C. For example, when the molding cycle becomes long and the temperature on the surface of parison 6 drops to about 60°C, it is necessary to control the temperature to about 150°C at the surface of the parison, and the molding cycle becomes shorter and the temperature reaches the position of temperature control mold 3. If the surface of the parison 6 is kept at about 120°C, it is preferable to adjust the temperature to about 50°C.The parison 6, whose temperature has been adjusted to the molding temperature in this way, is In synchronization with the movement of the circulation transfer means 1, the material is transferred into the blow molding mold 4 while being held by the neck mold 12.

As shown in FIGS. 2 and 4, the blow molding mold 4 consists of half molds 41, 42 and a bottom mold 43, and when these are opened, the parison 6 held in the wooden mold 12 is is transported and stops between the mold halves 41, 42.

On the other hand, as shown in FIG. 4, blow cavities 411 and 421 corresponding to the product bottles are formed in the half molds 41 and 42, as well as handle grooves 412 and 42 for holding the handle body 7.
2 is formed.

The parison 6 is carried into the blow mold 4, and a handle body 7 manufactured in a separate process is placed in the open half mold 41 using the handle insert arm 8. That is, after the handle body 7 is fitted into the handle groove 412, the handle insert arm 8 returns to its original position. In this way, by fitting the handle body 7 into one of the half molds, it is possible to arrange the parison 6 and the product bottle 62 without being disturbed by the movement of them going in and out between the blow molds. Extremely efficient.

In addition, since the gripping body can be carried in using the time when the blow molding mold 4 is open for loading and unloading the parison 6 and the product bottle 62, it is easy to synchronize with the intermittent movement of the circulation movement chamber 1, and other processes can be carried out. No adverse effects.

For example, as shown in FIG. 5, the handle body 7 has fitting arms 72 and 73 formed above and below the grip portion 71 to form a U-shape, and furthermore, the fitting arms 72 and 73 have locking protrusions 74. 75 is formed. And the fitting arms 72 and 73 are the cavities 41
1.421, so that the wall of the blow-molded parison 6 is molded into a bottle shape along the inner surface of the cavity, and at the same time wraps around the locking protrusion 74.75 of the handle body. , the bottle body and handle body are integrated. Of course, adhesive may be used, or the locking protrusion and adhesive may be used together.

After placing the parison 6 and the handle body 7 in the blow mold 4, as shown in FIG.
3 to close the blow molding mold 4, and stretch the parison 6 in the axial direction using the stretch rod 46.
By blowing high-pressure air and stretching in the radial direction, it can be formed into the shape of the product bottle 62 and integrated with the handle body 7. Thereafter, the pressure is released, the stretch rod 46 is removed, the blow molding mold 4 is opened, and the product bottle 62 is transported to the discharge station 5 while being held by the neck mold 12 in synchronization with the movement of the circulation transport device 1. Ru.

At the discharge station 5, the neck mold 12 is opened to release the product bottle 62 and finally a handle bottle is obtained.

(Effects of the Invention) The present invention molds a parison in the shape of a cylinder with a bottom using an injection molding mold, then transports the parison into a temperature control mold to adjust the molding temperature, and then transports the parison into a blow molding mold. This method of manufacturing a bottle with a handle is characterized in that the handle body manufactured in a separate process is placed in a blow molding mold, the blow mold is closed, and the handle body is integrated with the handle body, so the parison and the handle There is no need to time the injection molding of the body, there is no risk of the injection equipment becoming complicated, and it is not only easy to heat only the parison to the molding temperature, but also the blow molding equipment The efficient arrangement of the handles has the advantage that it is easy to synchronize the intermittent movement of the circulation transfer device with each step at the four positions.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing an example of an apparatus for carrying out the method for manufacturing a bottle with a handle according to the present invention, and FIG.
-■ sectional view, FIG. 3 is a sectional view taken along ■--■ of FIG. 1, FIG. 4 is a plan view of only the vicinity of the blow mold, and FIG. 5 is a side view of the handle body. 2... Injection mold, 3... Temperature control mold, 4... Blow molding mold, 6... Parison, 7... Handle body. Figure 1

Claims (1)

[Claims] A cylindrical parison with a bottom is molded using an injection mold, then transported into a temperature control mold to adjust the molding temperature, and then transported into a blow molding mold and a handle body manufactured in a separate process. A method for manufacturing a bottle with a handle, characterized in that the bottle is placed in a blow mold, and the bottle is integrated with a handle by closing the blow mold and blow molding.