JPH03256722A - Extrusion molding machine utilizing ultrasonic wave - Google Patents

Abstract

PURPOSE:To reduce the resistance at the time of passing through a die, to increase extrusion speed and amt. of extruded product and to prolong the service life of the die by fitting an ultrasonic oscillator to a mandrel provided on an open end part of a cylinder of an extruder main body or placing the ultrasonic oscillator in the mandrel and filling oils therein. CONSTITUTION:A die 2 wherein a molding hole 4 is perforated is fitted on one end part of an extruder main body 1 and a back die 7 is continuously brought into contact with the back thereof. A mandrel 3 is fitted on an open end part of a cylinder and an ultrasonic oscillator 5 is fitted therein or on the back thereof and to strengthen vibration energy, another ultrasonic oscillator 5 is also fitted on the outer periphery of the die 2. A resin or a rubber material 12 to be extruded is passed through between the mandrel and the molding hole 4 of the die 2 and extruded while an ultrasonic vibration is provided by bringing it into contact with the vibrating mandrel 3 is turned into a molding material 10. In this case, extrusion resistance of the molding material 12 is decreased and extrudability is improved and extrusion speed is enlarged and wear of the die 2 is decreased and latent air bubbles are removed by vibration to make a surface smooth. When the ultrasonic oscillator 5 is placed in the mandrel 3, oils are filled therein.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Industrial application field The present invention is directed to mtui, rubber molding materials, and mixed acid type materials in which resins and rubbers are mixed with fibers and powders of metals, carbon, ceramics, glass, etc. A single extrusion molding machine to be used, or a pipe/hose extrusion molding machine for the purpose of composite extrusion of resin or rubber with linear, spiral, etc. wire rods, cylindrical, net-shaped, etc. metal materials, It can be widely used in the field of single extruded acid type as the main material and in the field of composite extruded acid type of resin, rubber and metal materials.

(2) Prior art A conventional extrusion molding machine for pipes and hoss mainly made of resin or rubber is used to extrude a heated resin material or rubber material into a screw inside the extruder main body 1, as shown in Fig. 4. 8, the extruder body 1 is extruded through a mandrel (guiding core) 3 protruding toward the inside of the cylinder at the open end of the cylinder, and the mixture is distributed outwardly between the forming hole 4 formed in the die 2 and the mandrel 3. A hollow shaped material 10 formed into a cut ring shape was continuously extruded by passing through the material.

Mandrels are also used for composite acid shapes that combine metal materials such as wire rods, cylinders, and mesh tubes formed into casings, linear shapes, spiral shapes, etc., with resins and rubber, and when the metal materials pass through a die. A compound acid forming machine is used to extrude and compound resin and rubber.

However, ζ Eve using conventional resin and rubber, *
In the -S extruder, both the mandrel and the die were fixed in a stationary state, and a pressing force was only applied in one direction to the extruded resin or rubber material.

(3) Problems to be solved by the invention In conventional extrusion molding of resin or rubber, the mantle in contact with the extruded resin or rubber is fixed in a stationary state, and a pressing force is applied from one direction. The extrusion speed is almost determined by the shape, material quality, heating temperature, etc., and simply increasing the extrusion force to increase the speed will not only reduce the durability of the die and shorten its lifespan, but also In particular, in the case of molding materials in which fibers or powders such as metal, carbon, ceramics, glass, etc. are mixed with resin or rubber, the durability of the die and extrusion speed will be significantly affected and productivity will be reduced. Moreover, defoaming and uniform mixing are inhibited, resulting in poor surface finish, which poses a problem in maintaining quality.

In addition, even when combined with metal materials such as straight or spiral wires made of iron, aluminum, copper, etc., or metal materials such as cylindrical or mesh tubes, the same method can be used for coating, adhesion, defoaming, etc. of resin or rubber. At present, problems remain.

(4) Means for Solving the Problems The present invention is capable of increasing the extrusion speed, which had conventional problems, by extruding resin or rubber while excitation by applying ultrasonic vibration to the mandrel. It not only improves the quality of molded materials such as defoaming and surface finish, but also improves uniform mixing of mixed powders mixed into resins and rubbers, fibers, etc.
A pipe that promotes and facilitates directional alignment of chip-like contaminants,
A hose extrusion molding machine is provided.

In other words, a single extrusion molding machine extrudes a molding material mainly made of resin or rubber while applying ultrasonic vibration to the die, and a composite molding machine that continuously composites resin or rubber into the metal material that passes through the button and die. In an extrusion molding machine, an ultrasonic vibrator is attached to a mandrel provided at the open end of the cylinder of the extruder body, and the ultrasonic vibrator is housed inside the mandrel and filled with oil. This is an extrusion molding machine that uses sound waves.

(5) Function The present invention is a resin or rubber pipe or hose extrusion molding machine in which a mandrel provided at the open end of the extruder body is excited by applying ultrasonic vibrations to extrude the resin pipe or rubber. , casings, molding materials mainly made of resin or rubber mixed with various short fibers or powders, or resins and rubber composited with linear, spiral, etc. wires, cylindrical, net-shaped, etc. metal materials. Vibration is transmitted to the composite acid type material when it comes into contact with the mandrel, and the application of ultrasonic vibration is continued when the material reaches the molding hole of the die from inside the cylinder of the extruder main body and is molded. Therefore, the resistance when passing through the die is reduced, making it possible to increase the extrusion speed, increase the amount of extrusion, and extend the durable life of the die.

In the case of molding materials in which short fibers or powders of metals, carbon, ceramics, glass, etc. are mixed with resin or rubber materials, the average Promote uniform mixing and defoaming for uniform distribution.
In the case of a molding material mixed with short fibers or chip-like materials, it also has the effect of aligning the direction of the mixed materials.

(6) Examples Next, examples of the present invention will be described. Figure 1 is a tree.
An example of an extrusion molding machine for pipes and hoses made of Wt or rubber material alone, or resin or rubber pipes or hoses mixed with short fibers such as metal, carbon, ceramics, glass, powder, etc. is shown, and one end of the extruder body 1 is A die 2 having a forming hole 4 is mounted thereon, and a back die is connected behind it. Extruder body 1
At the open end of the cylinder (container) is a mandrel (
An ultrasonic vibrator 5 is installed inside the mandrel 3, on the casing or behind the mandrel (indicated by dotted lines), and ultrasonic vibration is also applied from the forming hole 4 side of the die 2 to generate vibration energy. If the force is to be increased, an ultrasonic transducer 5 is also attached to the outer periphery of the die 2 (indicated by dotted lines).

In addition, in order to prevent deformation of a soft molded material immediately after molding, a vibration isolating material 6 can be loaded behind the ultrasonic vibrator 5 to reduce vibrations on the back side, as shown in FIG. .

As is well known, the extruder main body 1 has a built-in screw 8 and the like, and by rotation of the screw 8 and the like, the heated resin or rubber material injected from the injection port 9 is continuously extruded in the direction of the die 2. The extruded resin or rubber material comes into contact with a continuously vibrating mandrel 3 and is subjected to ultrasonic vibrations while being extruded through between the forming hole 4 of the die 2 and the mandrel 3, and is formed into a predetermined pipe or hose. The molded material 1o is obtained.

In this case, the molding material 12 made of raw resin or rubber that is extruded under pressure projects into the cylinder of the extruder body 1 and comes into contact with the mandrel 3, which has a large contact surface, before reaching the molding hole 4. Ultrasonic vibrations are transmitted, and the vibrations pass through the molding holes 4 and continue in the molded grooves, so the vibrations are efficiently applied and extruded while the vibrations continue. Therefore,
The extrusion resistance of the molding material 12 passing through the molding hole 4 of the die 2 is reduced, improving extrusion performance, making it possible to increase the extrusion rate by increasing the extrusion rate, and reducing wear and tear on the die 2 to increase durability. Extends life and improves quality by removing latent bubbles and smoothing the surface through vibration.

Further, it promotes uniform mixing of the short fibers and powder mixed in, and assists in directional alignment of the fibrous contaminants.

Figure 2 shows a case in which a resin or rubber molding material is combined with a wire rod made of aluminum, iron, or copper formed in a straight or spiral shape, or a metal material configured in a cylindrical shape or a mesh tube shape.
An example of this is an extrusion molding machine for pipes and hoses made of composite molded materials, which incorporates a spiral metal wire 11. In the figure, the extruder main body 1 is connected to a metal material feeder 14 that supplies metal wire 11, and a molding material supply hole 15 is provided to allow the extruded resin or rubber molding material 12 and metal wire 11 to merge. The metal wire 11 and the molding material 12 are continuously combined by dividing the molding material 12 while applying ultrasonic vibrations by bringing them into contact with the mandrel 3 through which the ultrasonic vibrations are transmitted, thereby forming a spiral metal wire. It is used to extrude pipes and hoses.

FIG. 3 shows another embodiment for mounting the ultrasonic vibrator 5, in which the ultrasonic vibrator 5 is housed inside the mandrel 3, and the inside is filled with oil 13 such as mustard oil. This embodiment transmits vibrations to the mandrel 3 via the oil 13, so there is no acoustic loss due to the air on the mounting surface, and vibrations can be transmitted in all directions, which has the advantage of significantly improving vibration transmission efficiency. There is.

For the ultrasonic vibrator 5, the excitation type is selected as electrostrictive or magnetostrictive, and the material is selected as ceramic or ferrite, depending on the dimensions and shape of the mandrel, the resonance frequency, the cross-sectional shape and dimensions of the molded material, and the type and shape of the molded material. The optimum vibration frequency is determined depending on the hardness and viscosity, or the type, shape, amount of contaminants, etc., and the mode of excitation is also appropriately selected, such as vertical vibration, transverse vibration, or circular vibration with respect to the extrusion direction. The mounting method for the housing is appropriately selected from adhesion or bolt tightening depending on the heating temperature, extrusion pressure, extrusion speed, etc.

(7) Effects of the invention The present invention provides molding materials mainly made of resin or rubber, resins or rubber mixed with various short fibers, powders, etc., metal materials such as casings, wire rods, cylinders, net cylinders, etc. In pipe and hose extrusion molding machines that use molding materials such as resins and rubbers that are composited with molding materials, productivity is improved by increasing the extrusion rate by increasing the extrusion rate, and by reducing die damage and extending the durability life. At the same time, it has the effect of improving quality by defoaming the molded material and smoothing the surface. It also has the effect of improving uniform mixing of contaminants, directional alignment of the short fibers, and adhesion to metal materials to be composited.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of an embodiment of the present invention, Figure 2 is a diagram of metal materials and wood @
3 is a longitudinal cross-sectional view of an embodiment showing another mounting structure for the ultrasonic transducer, and FIG. 4 is a conventional resin casing or rubber pipe. , is a configuration diagram of a hose extrusion molding machine. As shown in the figure, 1... The extruder body, 2...
・Dice, 3...Mandrel, 4...
Molding hole, 5... Ultrasonic vibrator, 6...
Vibration isolating material, 7... Bakukudai, 8... Screw 9... Inlet, 10... Molding material, 11... Metal wire material , 12...Molding material, 13...Oil, 14...Metal material feeder, 15...Molding material supply hole 0

Claims (1)

[Claims] 1. A single extrusion molding machine that extrudes a molding material mainly made of resin or rubber while applying and exciting ultrasonic vibrations to a die, and a metal material passing through the die that continuously extrudes resin or rubber. 1. An ultrasonic extrusion molding machine that combines an ultrasonic vibrator with a mandrel provided at the open end of a cylinder of an extruder body. 2. Utilization of ultrasonic waves in a single extrusion molding machine and a compound extrusion molding machine, characterized in that an ultrasonic vibrator is housed inside a mandrel provided at the open end of the cylinder of the extruder body, and the mandrel is filled with oil. Extrusion machine.