JP2521008B2 - Injection molding method and injection molding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding method and an injection molding machine, and more particularly, to a plurality of molds that are alternately exchanged through a single injection device and a cylinder under different molding conditions. It relates to a new improvement for molding.

[0002]

2. Description of the Related Art Conventionally, when a molten resin injected from a single injection device and a cylinder of this type, which have been used in the past, is molded into each replaceable mold, this injection device is controlled. Molding was performed under common molding conditions from the molding condition control setter.

[0003]

Since the conventional injection molding method is constructed as described above, there are the following problems. That is, since the molding condition built in the molding condition control setting device is single, when the molds are exchanged and alternately molded, a single molding condition is always sufficient if the mold cavity shapes are the same. However, when the cavity shape of each mold is different (for example, when the parts are symmetrical as in the case of automobile headlights), if the same molding condition is satisfied for one mold, The conditions were unsuitable for other molds, and it was impossible for the molded product to satisfy the delicate and detailed conditions. Also,
As the quality of industrial products such as automobiles has become high-grade, molding conditions for fine parts, which have not been a problem in the past, influence the success or failure of the value of industrial products using the molded products. Therefore, the molding condition setter having only the single molding condition that has been used up to now cannot handle it.

The present invention has been made in order to solve the above problems, and particularly, different molding conditions are applied to a plurality of molds which are alternately replaced through a single injection device and a cylinder. It is an object of the present invention to provide an injection molding method and an injection molding machine that are molded by.

[0005]

An injection molding method according to the present invention is an injection molding method in which a plurality of movable dies are alternately used through a single injection device and a cylinder. This is a method in which the molding conditions are different for each mold.

More specifically, the fixed side molds of the respective molds are fixed as common fixed side molds, and only the movable side molds of the respective molds are alternately arranged with respect to the common fixed side mold. Is a way to move.

Further, the injection molding machine according to the present invention is an injection molding machine configured to alternately use a plurality of movable dies through a single injection device and a cylinder.
A plurality of condition control setters connected to the injection device and having a plurality of different molding conditions are provided, and molding is performed under different molding conditions for each of the molds.

More specifically, each of the molds comprises a fixed mold and a movable mold, and each mold is provided on a movable plate.

More specifically, the fixed-side molds of the respective molds are provided as common fixed-side molds on the fixed plate on the cylinder side, and only the movable-side molds of the respective molds are mounted on the fixed plate. This is a configuration provided on the movable plates facing each other.

More specifically, the fixed-side mold and the movable-side mold are arranged vertically.

[0011]

In the injection molding method and the injection molding machine according to the present invention, since a plurality of molding conditions are set in the plural condition control setting device, by changing the molding condition for each movable mold, for example, When molding symmetrical molded products, it is possible to set the optimum molding conditions for each molding, making it possible to create slightly different details by changing the molding conditions of each mold, which was impossible in the past. Can be done.

[0012]

The preferred embodiments of the injection molding method and the injection molding machine according to the present invention will be described in detail below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an injection device, and the injection device 1 is connected with a plurality of condition control setters 2 having a plurality of molding conditions therein via a cable 3.

The injection device 1 is connected to a cylinder 5 to which a hopper 4 is connected, and a nozzle 6 of this cylinder 5 is a fixed side metal which is an upper die provided on a fixed plate 7 fixedly arranged. Injection port 8 leading to fixed side cavity 8a of mold 8
It is joined to b. The fixed mold 8 constitutes a common fixed mold.

A movable plate 10 having a first movable mold 9 as a lower mold is disposed below the fixed plate 7 so as to be movable in the directions of arrows A and B. The first movable cavity 9a of 9 communicates with the fixed cavity 8a to form a mold cavity 11.

The fixed mold 8 and the first movable mold 9 constitute a first mold 12, which is located on the movable plate 10 at a predetermined distance from the first movable mold 9. Is fixedly provided with a second movable side mold 14 for forming the second mold 13, and the second movable side cavity 14a of the second movable side mold 14 is the fixed side cavity 8
It is configured to communicate with a. The movable platen 10 is not limited to the linear reciprocating structure described above, but may be a rotating platen that rotates although not shown.

Next, a description will be given of a case in which the respective molds 12 and 13 are actually alternately used to perform injection molding through the single injection device 1 and the cylinder 5 in the above-mentioned configuration. First, in the above-described configuration, with the movable plate 10 at the position shown in FIG. 1, the first molding condition for the molded product of the mold cavity 11 of the first mold 12 is output from the plural molding condition control setting device 2, and The injection device 1 is controlled under molding conditions.

Therefore, in the molding step, the mold is closed by a mold clamping device (not shown), and the injection / molding based on the first molding condition is performed.
It is the process of holding pressure, cooling the mold, opening the mold, and ejecting. Further, when the movable platen 10 is moved in the direction of arrow B by the moving means (not shown) after the first molding step by the first mold 12 is completed, the second movable side mold 14 is moved to the position shown in FIG. First
The second cavity 20 is formed by moving to the position of the movable mold 9.

In the above-mentioned state, the second molding condition of the plural molding condition control setting device 2 is input to the injection device 1 in conjunction with the operation of the movable platen 10, and the mold closing device (not shown) closes the mold. , Injection / pressure holding, cooling, mold opening, and ejecting steps, and the second molding step by the second mold 13 is completed.

Therefore, while repeating the above-mentioned molding process, each mold 1 is manufactured by using the single injection device 1 and the cylinder 5.
By changing the molding conditions for each of the molds 2 and 13, it is possible to freely mold the cavities 11 and 20 of the molds 12 and 13 based on the optimum molding conditions. For example, in the case of a light part for an automobile, 1 mold 12 to right part, second
The left part can be molded from the mold 13 under optimum molding conditions.

In the above-mentioned method, the fixed-side mold 8 is a common fixed-side mold, and only the pair of movable-side molds 9 and 14 are provided on the movable plate 10 and used. However, for example, each die 12, 13 is a die having a combination of a fixed side die and a movable side die, and each die is directly used as a movable plate without using the common fixed side die 8. Even when configured to move by 10, the same operation as described above can be obtained.

Further, the structure is not limited to the vertical injection molding machine 30 in which the fixed mold 8 and the movable mold 9 are vertically arranged as shown in FIG. It goes without saying that you can do it. In addition, in the above-mentioned embodiment, the case where two molds are used is described, but the number of molds may be two or more.

[0022]

Since the injection molding method and the injection molding machine according to the present invention are configured as described above, the following effects can be obtained. In other words, different molding conditions are given to each mold that moves alternately using a single injection device and cylinder that are commonly used, so that the molding quality of molded products that are alternately molded can be freely and optimally adjusted. Therefore, it is possible to easily mass-produce high-quality symmetrical molded products.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an injection molding machine according to the present invention.

[Explanation of symbols]

 1 injection device 5 cylinder 8 fixed side mold (common fixed side mold) 9,14 movable side mold 10 movable plate 12,13 mold 2 multiple molding condition control setter

Claims (6)

(57) [Claims] 1. An injection molding method in which a plurality of movable molds (12, 13) are alternately used for molding through a single injection device (1) and a cylinder (5). Mold (12,
An injection molding method, characterized in that the molding is performed under different molding conditions in 13). 2. The fixed side mold in each of the molds (12, 13)
(8) is fixed as a common fixed mold, and each mold (12,1
Injection molding method of claim 1 Symbol <br/> placing the movable mold only (9, 14), characterized in that the moving alternately to the common fixed side mold in 3). 3. An injection molding machine configured to alternately use a plurality of movable molds (12, 13) through a single injection device (1) and a cylinder (5), wherein the injection is performed. Equipment (1)
Injection molding characterized in that it has a plurality of condition control setters (2) connected to each other and having a plurality of different molding conditions, and is configured to mold under different molding conditions for each of the molds (12, 13). Molding machine. 4. The molds (12, 13) are composed of a fixed mold (8) and a movable mold (9, 14), and each mold (12, 13) is a movable plate (10). The injection molding machine according to claim 3 , wherein the injection molding machine has a structure provided in the. 5. The fixed side mold in each of the molds (12, 13)
(8) is a fixed plate on the cylinder (5) side as a common fixed mold
It is provided in (7), and each movable mold (9, 14) in each mold (12, 13) is provided on the movable plate (10) facing the fixed plate (7). The injection molding machine according to claim 4, which is characterized in that. 6. The fixed mold (8) and the movable mold (9, 1)
The injection molding machine according to claim 4 or 5 , characterized in that 4) is disposed in a vertical position.