JPH10296784A - Rotating type injection molding machine with three mold clamping devices - Google Patents

Abstract

PROBLEM TO BE SOLVED: To release easily a molded product by utilizing a bed rear end even for a mold clamping device with narrow and limited working spaces on both sides because of mold clamping devices adjoining obliquely. SOLUTION: In a rotating type injection molding machine in which an injection device 1 is mounted on a turn table 3 provided on a bed upper face and three mold clamping devices 4, 5 and 6 are disposed radially on beds 7, 8 and 9 along the circumference of the turn table 3 and the injection device 1 can correspond to respective mold clamping devices by the rotation movement, a bed 8 of the mold clamping device 5 on a central section is formed into a frame structure, and a space 19 for transferring a molded product backward is secured inside the frame structure. Openings of the space 19 are formed on the front of the bed upper face of the front section and the rear end. The openings are used as a molded product dropping opening 20 and molded product release openings 21 and 22. Hydraulic pressure equipments such as an oil tank, a motor and a pump required for the hydraulic operation of the mold clamping device 5, a heat exchanger and a control box are stored together with the equipments, the heat exchanger and the control box of the injection device 1 in a bed 2 on the injection device 1 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding machine capable of injecting a material resin for each mold clamping device by rotating one injection device with respect to three mold clamping devices.

[0002]

SUMMARY OF THE INVENTION In a rotary injection molding machine in which three mold clamping devices are radially arranged together with a bed along the circumference of a turntable on which an injection device is mounted, space efficiency is increased as much as possible. For this reason, it is common to install the bed of the mold clamping device so that the heel contacts the side opposite to the injection device. For this reason, the working space of the central clamping device in which the clamping devices are obliquely located on both sides is narrowed toward the front part connected to the bed of the injection device.

[0003] As a result, with the two mold clamping devices located at both ends of the arrangement, it is possible to use the outside of the bed as an operation space to discharge a molded product or to install a transfer device by means of a conveyor or the like. In such a case, it is extremely difficult to install a transfer device, even though it is possible to take out a molded product.

[0004] Such a problem can be solved by increasing the arrangement interval of the mold clamping device or by disposing the mold clamping device at a position far from the injection device. However, if the former method is employed, the turning angle increases. If the latter method is adopted, the forward / backward distance of the moving part of the injection device will increase, and the bed of the mold clamping device will need to be widened. As a result, the space efficiency is deteriorated, and the time required to perform the backward / turn / forward movement is increased, resulting in a problem that the production efficiency is deteriorated.

[0005] It is an object of the present invention to provide a new rotary injection molding machine which can solve the above-mentioned problem by removing a molded product from a mold clamping device at a central portion at a rear end of a bed. .

[0006]

According to the present invention, the injection device is mounted on a turntable provided on the upper surface of a bed, and three mold clamping devices are mounted together with the bed along the circumference of the turntable. In the rotary injection molding machine which is arranged radially and the injection device can be adapted to each mold clamping device by pivotal movement, the bed of the central mold clamping device is formed as a frame structure, and the rearward transfer of the molded product inside is performed. In addition to securing a possible empty space, open holes are provided at the front and both sides and the rear end of the upper surface of the bed, and these openings are formed as molded product dropouts and molded product discharge ports. Hydraulic equipment such as an oil tank, a motor, and a pump necessary for hydraulic operation of the apparatus, a heat exchanger, and a control box are housed together with those of the injection apparatus in a bed on the injection apparatus side.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawing, reference numeral 1 denotes an injection device which is mounted on a central portion of a turntable 3 provided on an upper surface of a bed 2 having a box-shaped structure. On three sides of the bed 2, first to third mold clamping devices 4, 5, 6, which are radially located on the side of the bed along the circumference of the turntable 3, are provided with respective beds 7, 8, 8. 9 are integrally connected to each other so that the heel contacts the side surface of the bed 2.

A plate 1 on which a pair of guide rails 11 are laid in parallel on the upper surface of the turntable 3.
A movable plate 12 is mounted on the installation plate 10 such that a slider 13 attached to the front and rear sides of the lower surface is fitted to the guide rails 11 and movably mounted thereon. is there.

The injection device 1 has a movable plate 12
A piston rod 14 of a hydraulic cylinder (not shown) formed in a seat body below the injection cylinder on the upper side is connected to a pressure receiving member 15 projecting on the outer edge of the installation plate 10,
The operation of the hydraulic cylinder causes the pressure receiving member 15 to move forward and backward with the movable plate 12 with respect to the mold clamping devices 4, 5, and 6 with the reaction force side.

[0010] Of the above-mentioned mold clamping devices, the first and third mold clamping devices 4, 6 located at both ends of the arrangement have a working space on the outside, and therefore, are formed in the same manner as a normal mold clamping device. The molded product drop openings 16 are fixed on box-shaped beds 7 and 9 each having an upper surface, and molded product discharge ports 17 are provided on the side surfaces of the bed on both sides of the molded product fall ports 16. Although hydraulic devices such as oil tanks, motors, and pumps for operating the mold clamping devices 4 and 6, heat exchangers, control boxes, and the like are omitted in the drawing, they are housed in the beds 7 and 9 as they are.

In the second mold clamping device 5 at the center, the working spaces 18 on the operation side and the non-operation side of the mold clamping device 5 are narrowed in a wedge shape because the mold clamping devices 4 and 6 are obliquely located on both sides. hand,
Since it is difficult to discharge the molded product as it is, the central bed 8 has a space 19 inside the frame structure for the rearward transfer of the molded product, and an opening is formed on the front upper surface of the cavity 19. An opening 21 is provided on both sides of the bed below the opening 20 and an opening 22 is provided at the rear end. The opening 20 serves as a molded product outlet, and the opening 22 serves as a molded product outlet. A belt conveyor 23 is disposed in the space 19 extending from the opening 20 to the molded article discharge port 22 at the rear end, and the molded article from the molded article dropping port 20 is removed from the molded article discharge port 22 at the rear end.
From the bed.

Since the hydraulic equipment necessary for the operation of the mold clamping device 5 cannot be installed in the bed 8 due to the arrangement of the belt conveyor 23, the hydraulic equipment such as an oil tank, a motor and a pump is omitted in the drawing. The heat exchanger, the control box, and the like are housed in the bed 2 of the injection device 1 together with hydraulic equipment such as an oil tank, a motor, and a pump for driving the injection device 1 and the heat exchanger, the control box, and the like. ing.

In such a configuration, in the first and third mold clamping devices 4 and 6 at both ends of the array, the molded product can be discharged using the outside of the beds 7 and 9 as a working space as in the past. Also, in the second mold clamping device 5 at the center, the molded product can be discharged from the rear end of the bed by using the space 19 inside the bed 8 as a discharge path for the molded product. Even if the working space is limited by the devices 4 and 6, the molded product can be discharged without any trouble, and the discharge of the molded product can be easily performed by installing the transfer device at the rear end of the bed.

Also, it is possible to employ a take-out machine for each mold clamping device by mounting it on a fixed plate at the front, and since the take-out machine is of a swing type, interference between the take-out machines can be prevented. Even with a rotary injection molding machine in which the mold clamping devices are radially arranged along with the bed along the circumference of the turntable, the molded product and the runner can be discharged for each mold clamping device without any problem. Also, since there is enough room in the bed on the injection device side, even if the hydraulic equipment of the mold clamping device in the center is stored, it does not affect the drive of the injection device, making maintenance work difficult. Nor.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a rotary injection molding machine including three mold clamping devices according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a side view of a mold clamping device in a central portion.

FIG. 4 is a rear end view of a mold clamping device in a central portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Injection apparatus 2 Injection apparatus side bed 3 Turntable 4 First mold clamping apparatus 5 Second mold clamping apparatus 6 Third mold clamping apparatus 7, 8, 9 Bed on mold clamping apparatus side 18 Work space 19 Empty space Reference Signs List 20 Mold drop port 21 Mold discharge port on both sides of bed 22 Mold discharge port at rear end of bed 23 Belt conveyor

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[Procedure amendment]

[Submission date] January 7, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004] Such a problem can be solved by increasing the arrangement interval of the mold clamping device or disposing the mold clamping device at a position far from the injection device. However, if the former method is employed, the turning angle increases. If the latter method is adopted, the forward / backward distance of the moving part of the injection device increases, and the bed of the mold clamping device needs to be widened. As a result, the space efficiency is deteriorated, and the time required for retreating / turning / forwarding becomes longer, resulting in a problem that the production efficiency is deteriorated.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshiaki Kudo Nagano Prefecture, Hanishina-gun, Sakajo-cho, 2110 Nanjo, Nissei Plastics Co., Ltd. Seisin Kogyo Co., Ltd.

Claims (1)

[Claims] 1. An injection device is mounted on a turntable provided on the upper surface of a bed, and three mold clamping devices are radially arranged along with the bed along the circumference of the turntable.
In the revolving type injection molding machine, which is configured so that the above-mentioned injection device can be adapted to each mold clamping device by pivoting movement, the bed of the mold clamping device in the central part is framed to secure an empty space inside which the molded product can be transferred backward. At the same time, openings are provided at the front part of the bed upper surface, at both sides of the front part, and at the rear end, and these openings are formed as a molded product drop port and a molded product discharge port, which is necessary for hydraulic operation of the mold clamping device. Hydraulic equipment such as an oil tank, a motor, a pump, etc., and a heat exchanger and a control box are equipped with three mold clamping devices, which are housed together with those of the injection device in a bed on the injection device side. Swivel injection molding machine.