JPS6258295B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a molded product having a material supply rotary table having a plurality of material supply hoppers individually filled with a plurality of types of materials to be tested, and a plurality of molded product storage containers mounted thereon. The present invention relates to an injection molding apparatus for testing resin materials comprising a storage rotary table, and in particular, a reference material having known physical properties is filled adjacent to the supply hopper on the material supply rotary table. hoppers are respectively disposed, and the molded product storage rotary table is configured to rotate so that the molded product storage container advances by one piece while the supply hopper advances by two pieces due to the rotation of the material supply rotary table. This relates to injection molding equipment for testing resin materials.

Conventionally, molding materials, especially thermoplastic resin materials such as polyethylene, have variations in molecular weight due to the large number of parameters involved in the manufacturing process of the material. If used as is, there is a disadvantage that molded products may have different physical properties such as strength and hardness.

For this reason, the actual molding process is performed using a molding device set to standard operating conditions (temperature, pressure, holding time, injection speed, etc.), and the physical properties of the finished molded product (tensile strength, A method has been proposed in which the variation in molecular weight, that is, the uniformity, of a resin material is tested by measuring the bending fracture, flow length, hardness, etc.

However, when testing many types of test materials using this method, even after being molded with one test material A, the test material A remains in the molding device.
remains, and then, when molding another test material B, the remaining test material A is removed in the molding device.
There was a drawback that it was difficult to tell whether the molded product was made from test material A, another test material B, or a mixture of the two, A+B.

Therefore, in order to wipe out the remaining components in the molding equipment of the preceding test material A, there is a disadvantage that the number of molding shots of the subsequent test material B is required to be more than necessary, and the cleaning period is also not experienced. The problem was that they had to rely on their own intuition.

In view of the above technical problems, the purpose of this invention is to
By intervening the molding process using a reference material whose physical properties are readily known during the molding process using a large number of test materials, the above-mentioned drawbacks are not only eliminated, but also the disadvantages are eliminated. It is an object of the present invention to provide a highly efficient injection molding apparatus for testing resin materials that can continuously test a large number of types of materials to be tested.

The configuration of the present invention in accordance with the above object is such that when continuously supplying a wide variety of test materials to a molding device,
Between supplying each test material, a reference material whose physical properties are known is supplied to the molding equipment, and when storing the molded products, only molded products made from one test material and molded products made from the reference material are combined together. The gist of this is that it can be stored in one container.

Next, embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a material supply rotary table, and a large number of material supply hoppers 2 are disposed on the rotary table in the circumferential direction.
Reference numeral 3 denotes a rotation shaft of the rotary table 1, which is rotationally driven by an appropriate drive source (for example, an oil motor). A linear vibrator feeder 4 supplies the resin material in the material supply hopper 2 to a material supply port of an injection unit, which will be described later. The above material supply hopper 2 contains every other material to be tested A, B, C,
Filled material supply hoppers 2a, 2b,
Hopper 2', 2'', 2 located between 2c...
... is filled with a reference material X whose physical properties are known in advance.

Next, 5 is a molded product storage rotary table, and molded product storage containers 6 are disposed on the rotary table 5 in the circumferential direction, and the storage containers 6', 6'', 6
The number of ... is 1/2 of the number of material supply hoppers 2 mentioned above.
It is. Reference numeral 7 denotes a rotation axis of the rotary table 5, on which the material supply rotary table 1 rotates, and the material supply hopper 2 is divided into two parts (for example, the supply hopper 2a filled with the material to be tested A and the reference material X).
While the filled material supply hopper 2') advances, the molded product storage rotary table 5 is driven by an appropriate means to rotate so that the storage container 6 advances by one piece.

Reference numeral 8 designates a known injection unit, which consists of a heating cylinder 9 and a screw 12 inserted into the heating cylinder 9. A nozzle 10 is attached to the lower tip of the heating cylinder 9, and a material supply port 11 is provided to the upper rear end. A vibrator feeder 4 is connected. A drive oil motor 13 and an injection drive source 14 are provided at the rear end of the screw 12.

In addition, 15 is a mold, which consists of an upper mold 16 and a lower mold 17, and 18 is a molded product ejecting device.

In the above configuration, the injection unit 8 has temperature, pressure, stroke, pressure holding time, screw rotation speed,
Operating conditions such as injection speed are preset to standard values. As the material supply rotary table 1 rotates, the material to be tested A is supplied from the supply hopper 2a filled with the material to be tested into the heating cylinder 9 via the linear vibrator feeder 4 and the material supply port 11. Then, by the rotation of the screw 12, it is transferred to the tip of the heating cylinder 9. During this time, the material to be tested A is plasticized by the heat from the heating tube 9 and the heat generated by friction during the rotation of the screw. The plasticized material is accumulated at the tip of the heating cylinder 9, and this reaction force causes the screw 12 to retreat, and when a predetermined amount of accumulation is completed, the molding machine performs mold clamping and injection.

Subsequently, the mold is opened, and the molded product is taken out of the mold by the molded product removal device 18 and stored in the molded product storage container 6'. Thereafter, this cycle is repeated, and about 20 shots of the same material to be tested are formed.

When the molding of the first material to be tested A is completed, the material supply rotary table 1 rotates, and the subsequent reference material
A material supply hopper 2' filled with is connected to the material supply port 11. Then, the injection molding operation using the reference material X is performed in the same manner as described above. During this time, the first test material A remaining in the heating cylinder 9 is completely wiped away by the reference material X.
Washed. The molded product of the reference material X is stored together with the molded product of the first material to be tested A in the storage container 6'.

Next, the material supply table 1 rotates, and the material supply hopper 2b filled with the subsequent second material to be tested B is connected to the material supply port 11, but at this time, the molded product storage rotary table 5 also rotates, and the next storage container 6'' comes to be located below and opposite to the molded product removal device 18.

In this way, the second material to be tested B does not mix with the first material to be tested A in the injection unit 8.
Further, the molded product is also stored in a storage container 6'' that is different from the storage container 6' for the molded product of the first material to be tested.

By repeating the above operations and molding all test materials A, B, C..., each molded product will be placed in a separate storage container 6', 6'', 6 for each test material.
...It will be stored inside.

In another embodiment of the present invention, by coloring the reference material X, the transition from one test material to another test material can be visually confirmed, and the reference material Since the time when cleaning of the injection unit is completed can be quickly detected, the cleaning period can be shortened.

Furthermore, in another embodiment, cleaning of the injection unit can be further facilitated by adding a cleaning agent to the reference material X, thereby further reducing the number of molding shots required for cleaning.

As described above, according to the present invention, when molding a molded article for each of multiple types of test materials, a reference material whose physical properties are known in advance is supplied between each test material and molded. This has the excellent effect of preventing mixing of one material to be tested with another material to be tested, and making it possible to obtain a molded product that accurately corresponds to each material to be tested.

In addition, the material supply rotary table 1 rotates and the molded product is stored while moving from the hopper of one material to be tested through the hopper of the reference material to the hopper of another material to be tested, that is, by two hoppers. Since the molded product storage rotary table 5 is configured to rotate so that one container is transferred, molded products of one type of test material are stored in each storage container according to the molding order of the test material. The molded product is stored completely separated from that of other materials to be tested, which has the effect of making it extremely easy to accurately confirm molded products made of each material to be tested. Furthermore, by appropriately coloring the reference material, the separation between various test materials can be visually confirmed, which facilitates the work and improves workability.

Furthermore, by adding a cleaning agent to the reference material, the cleaning and wiping of the residual material to be tested inside the injection unit by the reference material is further facilitated, and the number of shots for cleaning is significantly reduced. It also has the effect of being able to.

[Brief explanation of the drawing]

The figure shows an embodiment of the invention.
The figure is an overall view of the injection device for resin material testing, FIG. 2 is a top view of the material supply rotary table, and FIG. 3 is a top view of the molded product storage rotary table. 1... Material supply rotary table, 2... Material supply hopper, 5... Molded product storage rotary table, 6...
... Molded product storage container, 8... Injection unit, A,
B, C...Test material, X...Reference material.

Claims (1)

[Scope of Claims] 1. A material supply rotary table in which a plurality of material supply hoppers each individually filled with a plurality of types of test materials are disposed in the circumferential direction, and a plurality of molded product storage containers are arranged in the circumferential direction. In an injection molding apparatus for testing a resin material, the injection molding apparatus is equipped with a molded product storage rotary table disposed in hoppers each filled with a reference material are disposed, and the molded product storage rotary table rotates and the material supply rotary table advances by two material supply hoppers while the molded product storage container is filled with one molded product storage container. An injection molding apparatus for testing resin materials, characterized in that it is configured to rotate as it advances. 2. An injection molding apparatus for testing resin materials according to claim 1, wherein the reference material is colored. 3. The injection molding apparatus for resin material testing according to claim 1 or 2, characterized in that a cleaning agent is added to the reference material.