JP2001088184A - Cooling water tank for molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling water tank for moldings capable of cooling the moldings including special-shaped moldings having large capacity by circulated cooling water while spending sufficient time without lengthening a molding cycle of the moldings. SOLUTION: Cooling molds 13a housing the moldings are submerged in a water tank 13d by the cooling mold elevating/lowering opening/closing devices installed in a carrying in/out position E and the mount is intermittently rotated in the inside of the water tank 13d. At time of the intermittent rotation, circulated cooling water is spouted through discharge parts 18 in the countercurrent for the direction of rotation of the moldings and brought into contact with the periphery of the moldings to cool the same. Circulated water applied to an elevated temperature by this cooling is sucked through a suction part 19 and made to low temperature and thereafter returned to the water tank 13d by a pump and circulated to cool the moldings intermittently rotated in the inside of the water tank 13d. In this case, when water level is made higher than the desired water level by submerging the moldings in the water tank 13d, circulated water is overflowed from an overflow part 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling water tank for molded articles in a molded article apparatus made of waste, particularly molded articles mainly composed of waste plastic.

[0002]

2. Description of the Related Art It takes a long time to cool such a recycled product.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the disadvantages of the prior art and to efficiently cool a molded article utilizing waste containing waste plastic in a water tank.

[0004]

In order to solve the above-mentioned problems, a specific invention is to introduce a waste containing waste plastic into an extruder, knead and melt the melt, and then use an accumulator-type plunger type injection machine to melt the melt. Is stored in a desired amount, and then the melt is injected into the cavity of the closed molding die by the forward movement of the plunger in the injection machine to form a molded product. Then, the molding die is opened and the lid of the molding die is opened. Mold, leaving this molded article in one of the receiving mold, taking out this molded article from this lid mold, one of the receiving mold, transferring to the cooling mold,
In a device that cools a cooling mold by injecting it into a cooling water tank,
The water tank is provided with a molded article carry-in / out position, and a plurality of circulating cooling water discharge sections for blowing out circulating cooling water toward the molded article carry-in / out position are arranged, and are separated from these discharge sections. A circulating cooling water suction section is disposed near the molded product carrying-in / out position, and a circulating system is provided for circulating the circulating cooling water in a moving direction and countercurrent of the molded product in the cooling water tank in the water. And a circulating water cooling device for cooling the circulating cooling water having a high temperature and a pump are provided in the circulating system.

[0005] In order to solve the above-mentioned problems, the molded article may be one of a non-decorated injection molded article, an injection molded article mainly composed of waste plastic, and a decorative molded article. is there.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment describes a typical embodiment of the first and second aspects. In FIG. 1, FIG. 2, and FIG. 3, A is an apparatus for manufacturing a molded article using waste. The manufacturing apparatus A is provided with an extruder 10 for kneading and melting waste containing waste plastics. An accumulator-type plunger type injection machine 11 is connected downstream of the extruder 10 in communication therewith. A molding die 12 is connected to the tip. An upper mold (not shown) which is a lid mold of the molding die 12 has a shape (for example, a vacuum mold, an undercut, etc.) for holding a decorative molded product. The molded product held by the upper mold and having a hardened surface is transferred to a cooling mold 13a in a cooling device 13, and then the completely cooled and completely cured molded product P is dried from the cooling mold 13a as a kind of a draining device. A transfer device for transferring to the device 14 is arranged between the molding die 12 and the cooling device 13. The structure of the transfer device (not shown) is not limited, such as an industrial robot and a trolley-type traveling vehicle.

In the cooling device 13, six mounts 13b of the cooling mold 13a are arranged on the turntable 13c at equal intervals of 60 degrees in the circumferential direction. These mounting bases 13b
Is provided submerged in the cooling water tank 13d. The turntable 13c is provided so as to be intermittently rotatable around a vertical axis at a mounting interval angle of the mount 13b. A cooling-type elevating opening / closing device 16 is provided on the frame of the water tub 13d at a molded product carrying-in / out position E near the water tub 13d, and a drive source in an unloading device for taking out a cooled molded product from the cooling mold 13a. The frame is provided with a discharge rod which expands and contracts by a horizontal fluid type cylinder device (not shown) which is a kind of the above. The molded article carrying-in / out position E is provided in the water tank 13d.
A plurality of circulating cooling water discharge portions 18 for blowing out the circulating cooling water toward the molded product carrying-in / out position E are arranged. A circulating cooling water suction unit 19 is disposed near the entry position E, and a circulating system that circulates the circulating cooling water so that the circulating cooling water can flow in the direction in which the molded product P moves in the water of the water tank 13d. The circulating system is provided with a circulating water cooling device 20 for cooling the circulating cooling water having a high temperature and a pump 21 (see FIG. 3).

The operation will be described. The cooling die 13a containing the molded product is submerged in the water tank 13d by the cooling type lifting opening / closing device 16 at the carry-in / out position E, and the mounting base 13b is rotated intermittently in the water tank 13d. At the time of the intermittent rotation, the circulating cooling water is blown out from the discharge portion 18 in a countercurrent to the rotational direction of the molded product P to come into contact with the periphery of the molded product, thereby cooling the periphery of the molded product. The circulating water heated by the cooling is sucked in the suction part 19, cooled down by the circulating water cooling device 20, and then returned to the water tank 13d by the pump 21.
By circulating, the molded product rotating intermittently in the circulating water tank 13d is cooled. The circulating water cooling device 21 may be provided with a temperature control device capable of arbitrarily setting the cooling temperature. At this time, when the water level becomes higher than the desired water level due to the immersion of the molded product P into the water tank 13d, the circulating water overflows from the overflow part 22.

[0009]

According to the first aspect of the present invention, cooling of a molded article including a deformed article having a large capacity is performed by the circulating cooling water in a sufficient time without lengthening the molding cycle of the molded article. It can be carried out. After the molded product is cooled and heated to a high temperature, the circulating water is sucked into the suction section and cooled by the circulating water cooling device, and then returned to the water tank by a pump for circulating use. It can be prevented that the temperature of the water rises and the cooling effect is lost. According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the molded article can be sufficiently cooled regardless of the presence or absence of decoration, and the injection molded article mainly composed of waste plastic can be used. The cooling time can be made sufficiently long.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing the entire first embodiment.

FIG. 2 is a partial vertical sectional front view of FIG.

FIG. 3 is an enlarged plan view of the water tank.

[Explanation of symbols]

 13d cooling water tank 18 discharge part 19 suction part 20 circulating water cooling device

Claims (2)

[Claims] 1. A waste containing waste plastic is put into an extruder, kneaded and melted, and a desired amount of the melt is stored by an accumulator-type plunger type injection machine. After the plunger moves forward, the molded product is injected into the cavity of the closed molding die, and then the molding die is opened and the molded product is left on one of the lid die and the receiving die. , The molded product is taken out from one of the lid mold and the receiving mold and transferred to a cooling mold,
In a device for cooling a cooling mold by projecting and retracting in a cooling water tank, the water tank is provided with a molded article carry-in / out position, and circulating cooling water discharge for blowing out circulating cooling water toward the molded article carry-in / out position. A circulating cooling water suction unit is disposed near the molded product carrying-in / out position, away from the discharge unit, and a moving direction of the molded product in the cooling water tank in the water. And a circulating system for circulating the circulating cooling water in a countercurrent direction is provided, and the circulating system is provided with a circulating water cooling device and a pump for cooling the circulating cooling water heated to a high temperature. Cooling water tank. 2. The molding according to claim 1, wherein said molded article is one of a non-decorated injection molded article, an injection molded article mainly composed of waste plastic, and a decorative molded article. Cooling water tank for goods.