JPS606422A - Molding machine - Google Patents

Abstract

PURPOSE:To obtain a uniform and good molded item of a natural or synthetic resin, by passing mixture consisting of prescribed components in prescribed proportions for the intended item through a staggered narrow passage and at the same time subjecting it to ultrasonic waves before it is pressed into a mold. CONSTITUTION:Pellets or powders materials to be mixed that are in proper proportions are formed into a primary compact 25, the compact 25 is charged into a hopper 30, is reduced between projections 26A of a grinding roll 26 and projections 27A of a roll 27 to a very fine powder, and is formed into a prescribed composition in a mixing and pressing space 28 with a heating mechanism, the prescribed compositin being to be heated and mixed. The prescribed composition is allowed to flow through a narrow staggered passage. During this flow, it is subjected to ultrasonic waves generated by ultrasonic wave generators 5A, 5B, 5C. The ultrasonic waves are directly applied to the composition flowing through the passage or are applied indirectly thereto via wires or the like from the horns. Thus, a uniform and good molded item can be produced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molding device for heating and casting a composition containing a mixture of natural or synthetic resin components.

In contrast to molding natural or synthetic organic compounds as they are or as a main component or with necessary additional compositional additives, the present invention is capable of molding the organic compounds into microscopic powders rather than pellets. other ingredients or additional additives are pulverized and mixed, heated and mixed before or after mixing, and then the heated mixed composition is passed through slit channels of appropriate size before being poured into molds. The cross-sectional area is changed in size and jittery, and heating and mixing are carried out.
The material is made larger than that used in the conventional method, and is injected into a forming mold while being uniformly mixed and heated by applying the necessary ultrasonic strength, heated, and formed. By doing this, it is possible to improve the so-called mass deviation caused by the difference in mass of molded products and obtain a uniform composition and perfect molded product using conventional methods.
It is an object of the present invention to provide a mounting M of the present invention.

Next, one embodiment of the present invention will be explained based on the drawings. FIG. 1 is a side view showing a partially enlarged cross section when applied to an injection molding method according to an embodiment of the present invention, and FIG.
Figure B is a partially enlarged side sectional view of the applied example with some modifications. FIG. 3A is a front sectional view of another embodiment, and FIG. 3B is a partially enlarged detailed view thereof.

In FIG. 1, extremely fine powder 15 made from flakes of synthetic resin or high-molecular chemical substances is supplied to a hopper 10 installed at the top of an injection machine 1, and a hopper preheating system installed at one end of the injection machine 1 is used. An inner shell heated by a heating solvent or a heater 12 and an outer shell 13 containing the heater 12
The required amount is fed into the injection mechanism section of the injection machine 1 through the charging port 10A of the hopper 10, which is mounted on the hopper 10. A rotary shaft 7 equipped with a diagonal continuous feed screw 6 with a thread close to the inner surface of the inner shell 13 of the illustrated injection machine 1 connects the shaft 18 through a gear 8A of a drive shaft 18 connected to a power source 8. The shaft 7 fixed to the drive shaft 18 is rotated, and the thread of the screw 6 is inserted into the inner shell 13.
The granular material 14 rotates together with the shaft 7 within the shaft 7, and the powder 14 heated between the screw threads 6 is delivered to the forming mold 3. A jagged slit passage body 2 is provided in front of a mold 3. The illustrated example is a part that further heats and pressurizes the heated mixed composition A sent out from the injection machine 1 to make a mixed composition f: the required mixture. The third building attached to
Either the mechanism shown in Figure A is made thinner, or the above-mentioned mechanism is provided in place of this portion 2. Any combination of these may be used to produce the desired mixed composition. This selection is made in order to produce a good selection of the arbitrarily chosen one, so as to suit its purpose and purpose of use. The heated mixing and delivery performed in the narrow passageway 22 produce a good product that is compatible with the injection material 14 and the mixed composition 15 in the injection machine 1.

The narrow passageway 22 not only sends out the composition in the order in which it is fed, but also mixes the composition while making it flow in a zigzag path, so that the uniform heating process is sufficiently performed in small amounts. In addition, coagulation is performed in multiple directions such as front, rear, left, and right to ensure a uniform and good mixing of the components. An ultrasonic generator is provided in the slit passage 22,
Ultrasonic waves can be applied to the mixed composition to further improve thermal mixing. 9 is a heater for heating.

The results of a series of tests showed that the thickness of the slit passage was 0.1 to 11!
u! The resin pellet is made into a fine powder of 10 to 50 microns, and the required proportions of ingredients are added to form a predetermined composition, heated and mixed, and then pressurized. Let it flow.

FIG. 2A is an embodiment in which a zigzag slit flow passage 22 is formed in a part of the mold daughter 3 in communication with the mold cavity 23. The same is true for FIG. 2B.

FIG. 3A shows another application example of the apparatus for heating and mixing a mixed molded product. The primary solidified material 25 formed from pellets of the material to be mixed or powder mixed at an appropriate ratio is put into the hopper 30, and the protrusion 26A of the crushing roll 26 and the protrusion 2 of the roll 27 are placed in the hopper 30.
7A to produce extremely fine powder, a required heated mixed composition is formed in the mixing valve containing space 28 equipped with a heating mechanism, and the mixture is made to flow through the slits. During the flow, the required ultrasonic waves are generated and applied using the necessary ultrasonic generators 5A, 5B, and 5C. Ultrasonic waves are applied directly through the horn to the heated mixed composition flowing through channel 22, as shown in Figure 3B. Also, add it by spreading it from the horn to a wire, etc.

As explained above, when molding resins, natural or synthetic compounds using conventional injection, extrusion, or other equipment, the requirements for each component to be mixed, any additional components, etc. Before pushing the mixture into the mold, it is passed through a slit channel to uniformly mix and heat the mixture, and then ultrasonic waves are applied to the mixture at the lowest possible temperature and within the shortest possible time. Since a good mixing is carried out in the above step to produce a good heat-mixed composition, a uniform and good molded article can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged side sectional view of one embodiment of the present invention, and FIG.
Fig. A and Fig. 2B are partially modified enlarged views thereof, Fig. 3A is a side sectional view of another embodiment, and Fig. 3B is a partially enlarged detailed view thereof. 1 Injection machine 2 Jiggly slit passage body 3 Mold type 5A, 5B, 5C ultrasonic generator 1o, ao hopper 22 Jiggly slit passage 23 Mold cavity patent applicant Bengami Shitsukkusu Institute Co., Ltd. Agent Benrido Nakanishi −

Claims (1)

[Scope of Claims] 1. In molding of natural or synthetic resins, a jagged thin material is provided before being pushed into the desired mold from a mixer that mixes the desired proportions of the necessary components of the molded object. A mold forming device characterized by having a gap passage. 2. In molding of natural or synthetic resin, a jagged slit passage is provided in front of the mixing machine that mixes the required proportions of the required components of the molded object into the required mold. A mold forming device characterized by being provided with an ultrasonic vibration generating mechanism that applies ultrasonic vibrations to a mixture flowing through a narrow passageway.