JP3245370B2 - Vertical molding machine for multilayer molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical molding machine for a multilayer molded product comprising a vertical mold clamping device and a horizontal injection device. The present invention relates to a vertical molding machine for a multilayer molded product, which can easily and easily achieve the movement of a die and the injection of a molten resin when supplying a molten resin.

[0002]

2. Description of the Related Art Generally, a vertical molding machine for a multilayer molded product is provided with a movable plate vertically moving above a lower die attached to a fixed plate, and an upper die is attached to the movable plate. A mold clamping device for vertically opening and closing the upper mold with respect to a molding portion of the molten resin formed in the lower mold, and a die provided so as to face the lower mold, and a molten resin And an injection device in which a plurality of injection machines each having a discharge port connected so as to supply the same are supplied.

[0003] The injection device is mounted on a gantry, and is configured to move horizontally to and away from the mold clamping device. The die is set at an injection position in the molding part and is separated from the die. At the die injection position, the molten resin is injected from the die into a sheet, and then, at the die standby position, the movable platen of the mold clamping device is lowered to lower the upper die. At the same time as the mold is clamped against the mold to press the molded product, each injection machine plasticizes and measures the fat material for the next cycle.

Therefore, according to the vertical molding machine for a multilayer molded product having such a configuration, a molded product composed of a multilayer sheet can be continuously pressed.

However, in the above-mentioned conventional vertical molding machine, the dies attached to the injection device are respectively connected to the discharge ports at the tips of the long plasticizing barrels of the plurality of injection machines via connection pipes. And is itself composed of a large and heavy composite die.
That is, the die is made larger and heavier than a normal die, and is also supported in a cantilever manner via a relatively long elongated object to the injection machine.

For this reason, in the conventional vertical molding machine, when the die moves forward and backward between the injection position and the standby position, there arises a disadvantage of unstable operation such as run-out, and a die sheet is formed. However, there is a problem that unevenness of the wall thickness and quality deterioration occur.

Therefore, in the conventional vertical molding machine, the injection device is arranged horizontally on the floor surface, and the injection machine moves horizontally on the installation table before and after the injection, etc. In order to eliminate the inconvenience of having to set the installation area of the injection device large in accordance with the movement, it is necessary to form the injection device in a vertical mold so as to move in the vertical direction similarly to the mold clamping device. (Japanese Utility Model Publication No. 7-55055).

[0008] However, in the molding machine according to the above proposal, the movement of the injection device is set in the vertical direction,
Although it is possible to reduce the installation area in the horizontal direction, in this case, when injecting the molten resin into the molding portion of the lower mold, the lower mold is horizontally moved to the die side located at the lower end of the injection device. Need to be done. Therefore, in order to move the lower die in this way, it is necessary to perform appropriate positioning settings between the lower die and the upper die as well as proper positioning settings between the die and the lower die, and high-precision positioning control is required for each. If the positioning is slightly deviated, a defective product is immediately generated, and the control operation is complicated.

In addition, in the case where the size of the die is increased in size and weight, the load exerts an influence on the control characteristics when controlling the injection device in the vertical direction. Therefore, there are disadvantages such as an increase in manufacturing cost.

[0010]

Therefore, the present inventor has proposed:
As a result of intensive research, the configuration of the mold clamping device and the injection device is basically the same as the conventional configuration, and the dies are always held stably by movably holding or supporting the dies by independent guide means. It was also found that by linking the guide means to the forward and backward movement of the injection device, a vertical molding machine having low positioning cost and high positioning accuracy can be obtained without providing special control means.

Accordingly, an object of the present invention is to increase the size of a die for injecting a multilayer molding material made of a molten resin in a combination of a mold clamping device and an injection device which moves horizontally in a horizontal direction with respect to the mold clamping device. Another object of the present invention is to provide a vertical molding machine for a multilayer molded article which can stably operate its movement and injection of a molten resin even if it is heavy, and can manufacture it at low cost.

[0012]

In order to achieve the above object, a vertical molding machine for a multilayer molded product according to the present invention comprises a movable plate vertically moving above and below a lower die attached to a fixed plate. A mold clamping device for mounting and dismounting the upper die on the movable platen and vertically opening and closing the upper die with respect to the molded portion of the molten resin formed on the lower die, and facing the lower die. And an injection device in which a plurality of injection machines each having a discharge port connected to supply the molten resin to the die are arranged, and the injection device is mounted on a gantry and the mold is formed. Vertical molding for a multilayer molded product, wherein the molding device is configured to move horizontally in a horizontal direction with respect to a tightening device, and the die is set to an injection position in the molding portion and set to a standby position apart from the injection position. Machine, straddle the lower die against the die A guide means for holding and holding the lower die and moving forward and backward in conjunction with the injection device on the fixed plate attached with the lower die is provided, and the molten resin is injected from the injection device to the lower mold part at the die injection position. Injecting, and then moving down the movable platen at the standby position of the die to clamp the upper die to the lower die.

In this case, the guide means for holding the die so as to be able to advance and retreat is provided with a slider for holding the die symmetrically across the lower mold, and on a fixed plate on both the left and right sides of the lower mold. And the slider can be configured to move along the guide rail.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a vertical molding machine for a multilayer molded product according to the present invention will be described in detail with reference to the accompanying drawings.

The vertical molding machine for a multilayer molded product according to the present invention comprises:
The configuration is basically the same as the configuration of the conventional vertical molding machine described above. That is, in FIG. 1 and FIG.
Indicates a vertical type clamping device, and reference numeral 30 indicates an injection device arranged in a horizontal type.

However, the mold clamping device 10 is provided with a movable plate 16 which moves up and down above the lower die 14 attached on the fixed plate 12, and an upper die 18 is attached to the movable plate 16. By vertically moving the upper die 18 vertically in the vertical direction through the mold clamping means 20 and the guide column 22, a molding portion (injection position L) of the molten resin formed in the lower die 14 is formed.
It is configured to open and close the upper die 18 with respect to 2).

On the other hand, the injection device 30 transfers the molten resin on a gantry 32 which horizontally moves horizontally between a standby position M1 and an injection position M2 via a drive hydraulic cylinder 32a and a guide member 32b. It has a configuration in which a plurality (three in the illustrated example) of injection machines 34, 36, and 38 for injection are arranged. In this case, the discharge ports 34b, 36b, 38b at the tips of the plasticizing barrels 34a, 36a, 38a of the injection machines 34, 36, 38 are connected to the connecting pipes 34, respectively.
It is connected to the die 40 via c, 36c and 38c. The die 40 is configured to move forward and backward between the injection position L2 of the mold clamping device 10 and the standby position L1 separated therefrom as the gantry 32 moves forward and backward.

With this configuration, at the injection position L2 of the die 40, the mold clamping device 10 in which the molten resin has been injected into the molding portion, then moves the die 40 to the standby position L1 so that the die is moved to the standby position L1. The clamping means 20 operates to lower the upper die 18 together with the movable plate 16, and the lower die 14 and the upper die 18 are clamped.

During this mold clamping step, each of the injection machines 34, 36 and 38 in the injection device 30 performs a plasticization measuring step for obtaining a molten resin for the next molding cycle.

Therefore, in the present invention, the injection position L 2 and the standby position L
A guide means 50 is provided for moving back and forth between the two. That is, as shown in FIG. 3, the guide means 50 includes a slider 54 for holding the dice 40 so as to straddle the lower mold 14 on the fixed board 12, and a slider 54 on both sides of the lower mold 14 on the fixed board 12. Guide rails 52 arranged in parallel with each other.
, The slider 54 is slidably mounted on the slider 54.

Therefore, in this embodiment, the die 40
Is larger and heavier than a normal die, and even if it is supported in a cantilever manner by a relatively long object that is relatively vulnerable to the injection device 30,
Can be smoothly moved following the forward / backward movement of the gantry 32, the operation of the die 40 can be stabilized, and the quality of the multilayer molded product can be improved.

FIG. 4 shows another embodiment of the guide means of the die 40 in the vertical molding machine for a multilayer molded product according to the present invention. That is, the guide means 60 of the present embodiment.
Is a configuration in which the guide rail 62 in the above embodiment is formed at a position higher than the lower mold 14, the structure of the slider 64 is miniaturized, and the slider 64 is slidably mounted on the guide rail 62 via wheels 64a. Consists of With such a configuration, the weight of the slider 64 can be reduced and the movement thereof can be further facilitated. The other operations and effects on the die 40 are the same as those in the above-described embodiment, and thus detailed description will be omitted.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and many design changes can be made without departing from the spirit of the present invention.

[0024]

As described above, the vertical molding machine for a multilayer molded product according to the present invention is provided with a movable plate vertically moving above a lower die attached to a fixed plate. A mold clamping device that attaches an upper mold to the upper and lower molds and opens and closes the upper mold vertically with respect to a molded portion of the molten resin formed in the lower mold.
A die is provided so as to face the lower mold,
An injection device in which a plurality of injection machines each connected to a discharge port so as to supply a molten resin to the die is arranged, and the injection device is mounted on a gantry and laterally with respect to the mold clamping device. In a vertical molding machine for a multilayer molded product configured to move horizontally and to be separated from the injection position in the molding section and to be in a standby position while the die is in the injection position, A guide means for holding and holding the lower mold so as to straddle the lower mold and moving forward and backward in conjunction with the injection device on the fixed plate having the lower mold attached thereto, and moving the lower mold from the molding apparatus at the injection position of the die. By injecting molten resin into the molding part, and then moving down the movable platen at the standby position of the die and clamping the upper die to the lower die, the die becomes larger than a normal die And weight Even if it is supported in a cantilever manner by a relatively long object that is relatively vulnerable to the injection machine, it can follow the operation of the base of the injection device and operate smoothly without special control means. Can be.

Therefore, according to the present invention, the conventional difficulties in the dies of this type of vertical molding machine, namely, the movement of the dies and the operation of the injection of the molten resin due to the large weight of the dies and their cantilever support. Of the multilayer molded product can be improved and the quality of the multilayer molded product can be improved, and many advantages such as low-cost production can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing one embodiment of a vertical molding machine for a multilayer molded product according to the present invention.

FIG. 2 is a schematic side view of the vertical molding machine for a multilayer molded product shown in FIG.

FIG. 3 is an enlarged view taken along the line III-III of FIG. 2 showing guide means for dies of the vertical molding machine for multilayer molded products in FIGS. 1 and 2;

FIG. 4 is an enlarged view similar to FIG. 3, showing another embodiment of the guide means of the dies of the vertical molding machine for a multilayer molded product according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 mold clamping device 12 fixed plate 14 lower mold 16 movable plate 18 upper mold 20 mold clamping means 30 injection device 32 gantry 32a hydraulic cylinder 32b guide member 34, 36, 38 injection machine 34a, 36a, 38a plasticizing barrel 34b, 36b, 38b Discharge port 34c, 36c, 38c Connecting pipe 40 Dice 50, 60 Guide means 52, 62 Guide rail 54, 64 Slider 54a, 64a Wheel

Claims (2)

(57) [Claims] 1. A movable plate vertically moving above a lower die attached to a fixed plate, and an upper die is attached to the movable plate, and a molding portion of a molten resin formed on the lower die is provided. A plurality of die clamping devices for opening and closing the upper die in the vertical direction, a die provided so as to face the lower die, and discharge ports connected to supply the molten resin to the die. The injection device is arranged on the gantry, and configured to move horizontally to the mold clamping device in a horizontal direction with respect to the mold clamping device. In a vertical molding machine for a multilayer molded product, which is set so as to be separated from the die and set as a standby position, the die is held across the lower die and the lower die is removed. Works with the injection device on the fixed platen Providing guide means for moving forward and backward, injecting the molten resin from the injection device to the molding part of the lower die at the injection position of the die, and then lowering the movable platen at the standby position of the die to move the upper die to the lower die A vertical molding machine for a multilayer molded product, wherein the vertical molding machine is configured to be clamped. 2. A guide means for holding a die so that it can move forward and backward, a slider for holding the die symmetrically across the lower die, and guides disposed on the left and right sides of the lower die on a fixed platen. The vertical molding machine for a multilayer molded article according to claim 1, comprising a rail, and configured to move the slider along the guide rail.