JPH03256721A - Extrusion molding machine utilizing ultrasonic wave - Google Patents

Abstract

PURPOSE:To reduce the resistance at the time of passing through a die, to increase the extrusion speed and to prolong the service life of die by fitting the die piled with an ultrasonic oscillator and making a molding hole through in the die and the ultrasonic oscillator. CONSTITUTION:A die 2 piled with an ultrasonic oscillator on its rear face side is adhered on one end of an extruder main body 1 through a vibrationproof material 3 and a molding hole 4 is perforated through both devices. A resin or a rubber material to be extruded is extruded through the molding hole 4 perforated in the continuously vibrated die 2 and the ultrasonic oscillator 5 oscillating it to form a molded item 10. In this case, vibration is efficiently transmitted to a molding material 12 from a cylinder of the extruder main body 1 and extrudability of the molding material passing through the molding hole 4 is improved and extrusion speed is enlarged and wearing of the die is reduced and air bubbles are removed by vibration to improve surface finishing. In addition, an ultrasonic vibration hole 5 may be furnished on the outer periphery of the die 2 or an ultrasonic oscillator 5 wherein a molding hole 4 is perforated may be used both as an oscillator and as a die.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Industrial application field The present invention is applicable to resin and rubber molding materials, resin and rubber metals,
Single extrusion molding using mixed molding materials mixed with short fibers and powders such as carbon, ceramics, glass, casings, foaming agents, etc., or molding materials with various cross-sectional shapes made of resin, rubber and metal, linear shapes, helical shapes, etc. Concerning extrusion molding machines for the purpose of composite extrusion molding with wire rods such as shapes, single extrusion molding with resin or rubber as the main material, and composite extrusion molding with metal molding materials such as aluminum and iron and resin or rubber. It can be widely used.

(2) Prior Art A conventional extrusion molding machine for wood or rubber extrudes heated resin material or rubber material using a screw 8 inside the extruder main body 1, as shown in FIG. By passing the molded material 10 through a die 2 provided with a molding hole 4, a molded material 10 having a cross-sectional shape corresponding to the shape of the molding hole 4 was continuously extruded.

Composite molding materials have also been developed in which metal molding materials such as aluminum and iron are combined with resins and rubber. When a metal molded material passes through a die using a welded sheet or an extrusion molding machine, a composite molding machine is used in which a resin or rubber material is extruded onto the outer surface of the molded material to form a compound.

However, in all conventional resin or rubber extrusion molding machines, the die is in a stationary state, and a pressing force is only applied in one direction to the extruded resin or rubber.

Patent application 1986-23 concerning an invention developed by the present inventor in recent years
No. 3457 is an extrusion molding method that uses ultrasonic vibration, but as illustrated in FIG. 8, it has a structure in which an ultrasonic vibrator 5 is pressed into a die 2 with a small area and fitted into a housing or a back dia. It is shown.

(3) Problem to be solved by the invention Conventional tree mt
Or rubber extrusion molding is a resin that is extruded! The die through which the rubber or rubber passes is fixed in a stationary state, and a pressing force is applied from one direction.The extrusion speed is approximately determined by the shape of the molded product, the quality of the material, the heating temperature, etc. Increasing the speed not only reduces the durability of the die and shortens its lifespan, but also deteriorates the quality of the molded material, which can cause damage to resins, rubbers, metals, fibers and powders such as carbon, ceramics, and glass. In the case of molding materials mixed with molding materials, it significantly affects die durability and extrusion speed, lowering productivity, and also poses problems in maintaining quality because defoaming and uniform mixing are inhibited, resulting in poor surface finish. .

In addition, in Japanese Patent Application No. 62-233457, the ultrasonic vibrator to be fitted is limited by the dimensions of the die or back die and the shape of the molding hole, and there is a limit to the output of ultrasonic vibration energy that can be generated. There are many phenomena in which vibration is suppressed due to pressure, and if the material, shape, and dimensions of the ultrasonic transducer differ depending on the vibration frequency, there is a fundamental problem that the vibration effect is significantly reduced due to the structure. The attachment and replacement of the child also had the disadvantage of being extremely inconvenient.

There are many problems with resin and rubber coating, adhesion, adhesion, injection, etc. when extruding composite molding materials with metal molding materials such as iron and aluminum. Currently, many problems remain unresolved.

(4) Means for Solving the Problems The present invention applies ultrasonic vibration to a die and extrudes resin or rubber while exciting it, thereby increasing the extrusion speed and increasing the durability of the die, which had conventional problems. Enables longevity,
In addition to improving the quality of molded materials such as defoaming and surface finishing, it also promotes uniform mixing of mixed powders mixed into resins and rubbers, directional alignment of fibers and chip-like mixtures, and uniform foaming of mixed foaming agents. The purpose of this invention is to provide an extrusion molding machine that facilitates this process.

In other words, there are single extrusion molding machines that extrude molding materials mainly made of resin or rubber while applying and exciting ultrasonic vibrations to a die, and composite molding machines that continuously composite resin or rubber into metal molding materials that pass through a die. In extrusion molding machines, ultrasonic vibrators are mounted on the die in a superimposed manner, and the die and ultrasonic transducer pass through the molding hole, or the ultrasonic vibrator is mounted on the outer periphery of the die, and the molding hole is drilled. This is an extrusion molding machine that utilizes ultrasonic waves, with the installed ultrasonic vibrator also serving as a die.

(5) Function The present invention is used in an extrusion molding machine for resin or rubber, in which a die provided with a molding hole corresponding to the cross-sectional shape of the molded material is excited by applying ultrasonic vibration, and extruded. Molding materials mainly made of resin or rubber, resin or rubber mixed with various short fibers, powders, foaming agents, etc., or resins, rubber, etc. that are coated with metal molding materials such as aluminum or iron, or wire rods. Since the composite molding material is subjected to vibration when passing through the molding hole of the die, the resistance during passage through the die is reduced, making it possible to increase the extrusion speed and extend the durable life of the die.

In addition, since the molding material reaches the die and the molding hole of the ultrasonic vibrator from inside the cylinder of the extruder main body 1 and is molded, ultrasonic vibrations are transmitted and applied, so latent air bubbles in the molding material are removed from the surface. In the case of molding materials in which short fibers or powders of metals, carbon, ceramics, glass, etc. are mixed into the resin or rubber material, uniform mixing and defoaming are performed to ensure an even distribution. It has a promoting effect.

Furthermore, in the case of molding materials that contain short fibers or chips, it has the effect of aligning the direction of the contaminants, and in the case of molding materials that contain foaming agents, it has the effect of diffusing foam and promoting uniform foaming. have

(6) Examples Next, examples of the present invention will be described. Figure 1 is! waste,
An example of an extrusion molding machine for resin or rubber mixed with short fibers such as metal, carbon, ceramics, glass, powder, etc. is shown, and vibration isolating material 3 is attached to one end of the extruder body 1. The die 2 is mounted through the die 2, and the ultrasonic transducer 5 is superimposed and glued on the back side, and the die 2 and the ultrasonic transducer 5 are passed through to form a molding hole 4 corresponding to the fragmented shape of the molded material 10. to be drilled. A back diamond is connected to the back surface of the ultrasonic vibrator 5 via a vibration isolating material 6 to improve the efficiency of ultrasonic excitation of the die 2.

The extruder main body 1 includes a well-known screw 8, etc., and by rotation of the screw 8, etc., the heated wood 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 is extruded through a molding hole 4 drilled in a continuously vibrating die 2 and an ultrasonic vibrator 5 that excites it, to form a continuous molded body 10 with a predetermined cross-sectional shape. The bottom of the tank is In this case, the molding material 12 made of resin or rubber that is extruded under pressure is
Ultrasonic vibrations are transmitted from within the cylinder of the extruder main body 1 before reaching the forming hole 4, and the extruder body 1 comes into direct contact with the ultrasonic-vibrating die 2, so the vibrations are efficiently transmitted and extruded while vibrating. .

Therefore, the extrusion resistance of the molding material passing through the molding hole 4 of the die 2 is reduced, the extrudability is improved, the extrusion speed can be increased, and wear and tear on the die is reduced. Improved finish and quality.

In addition, during molding, ultrasonic vibrations are transmitted and applied to the molding material 12 not only when the die 2 passes through the molding hole 4 but also before reaching the molding hole 4, thereby defoaming latent air bubbles in the molding material 12. It promotes uniform mixing of the short fibers and powder mixed in, and also aligns the direction of the fibrous contaminants and promotes uniform foaming of the mixed foaming agent.

FIG. 2 shows an embodiment in which an ultrasonic vibrator 5 is attached to the outer periphery of the die 2, and the die 2 is ultrasonically vibrated from the outer periphery to
This not only makes it possible to easily replace the ultrasonic vibrator 5 and apply a particularly large amount of ultrasonic energy, but also to apply vibrations to the molding material 12 passing through the die 2. There is an advantage that the direction of vibration can be selected appropriately. In addition, an oil-filled case 11 is provided at the contact between the ultrasonic vibrator 5 and the die 2 as shown by dotted lines, and filled with oil such as castor oil, so that the ultrasonic vibrations generated by the ultrasonic vibrator 5 are transmitted through the oil. can also be efficiently transmitted to dice 2.

Fig. 3 shows an embodiment in which the die 2 is omitted and an ultrasonic vibrator 5 with a molding hole 4 is used as the die 2.
This has the advantage that the efficiency of applying vibration to the molding material 12 is the best.

Figure 4 shows an example of a composite molding material extrusion molding machine that combines a resin or rubber molding material with a metal molding material whose bottom is made of aluminum, iron, or copper. An extruder body is connected to a metal molding material feeder 15 provided with a through hole 17 corresponding to the cross-sectional shape, and a molding material supply hole 16 is provided near the die 2 to extrude resin or rubber molding material 12. and the metal forming material 13, and when passing through the forming hole 4 of the die 2 through which ultrasonic vibrations are transmitted, the forming material is applied to the entire outer casing or one surface of the metal forming material 13 while applying ultrasonic vibrations. 12 are successively combined.

When filling a molding material into the internal gap of a metal molding material, or when injecting a molding material between two gold@forming materials to form a composite molding material, the vibration transmission system moves the metal molding material. The installation of the ultrasonic transducer 5 is the same as in each of the above embodiments, except for the difference in the intermediate points.

For the ultrasonic vibrator 5, the excitation format is selected as electrostrictive or magnetostrictive, and the material is selected as ceramic or ferrite, depending on the dimensions and shape of the die, the resonance frequency, the cross-sectional shape and dimensions of the molded material, and the type of molding material and its 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 appropriately selected such as longitudinal vibration, transverse vibration, circular vibration, etc. with respect to the extrusion direction. In addition, the mounting method is heating temperature,
Adhesion or bolting is selected as appropriate depending on extrusion pressure, extrusion speed, etc.

(7) Effects of the invention The present invention is a resin casing, a molding material mainly made of rubber, or a resin or rubber mixed with various short fibers, powders, foaming agents, etc.
Or, in extrusion molding machines that use molding materials such as resins and rubbers that are combined with metal molding materials and wire rods, it is possible to increase the extrusion rate by increasing the extrusion rate, and to extend the durability life by reducing die damage, thereby increasing productivity. It has the effect of improving quality by defoaming the molded material and smoothing the surface.

It is especially suitable for extrusion molding of thin-walled molded products, ultra-fine molded materials, and molded materials with complex cross-sectional shapes, and the improvement in production efficiency and quality is remarkable. It also has the effect of promoting uniform mixing of contaminants and uniform foaming of the mixed foaming agent, and improving the directional alignment of the mixed short fibers and the adhesion to the metal forming material to be composited.

[Brief explanation of drawings]

Figures 1 to 5 show the configuration of an embodiment of an extrusion molding machine for molding materials based on resin shavings or combs according to the present invention. Figure 2 is a configuration diagram of an embodiment in which the ultrasonic vibrator is passed through a molding hole, Figure 2 is a configuration diagram of an example in which the ultrasonic vibrator is attached to the outer periphery of a die, and Figure 3 is a diagram in which the die is omitted and a molding hole is drilled. Fig. 4 is a block diagram of an embodiment in which the ultrasonic transducer also serves as a die; Fig. 4 is a block diagram of an embodiment in which the outer surface of a metal molded material is coated with a molding material such as resin or rubber; and Fig. 5 is a diagram of a conventional resin FIG. 6 is a block diagram of a conventional extrusion molding machine that utilizes ultrasonic vibration for extrusion molding of resin and rubber. In the figure, 1... Extruder main body, 2...
Dice, 3... Vibration isolating material, 4... Molding hole, 5... Ultrasonic vibrator, 6... Vibration isolating material, 7... ...back die, 8...scree:
L-'l... Inlet, 10... Molding material, 1
DESCRIPTION OF SYMBOLS 1... Oil-filled case, 12... Molding material, 13... Metal forming material, 14... Through hole, 15... Metal Molding material supply machine, 16...
...Indicates the molding material supply hole.

Claims (1)

[Scope of 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;
In a composite extrusion molding machine that continuously composites resin or rubber into a metal molded material passing through a die, an ultrasonic vibrator is superimposed on the die, and the molding hole is passed through the die and the ultrasonic vibrator. An extrusion molding machine that uses ultrasonic waves. 2. An extrusion molding machine using ultrasonic waves, which is characterized in that an ultrasonic vibrator is attached to the outer periphery of a die in a single extrusion molding machine and a composite extrusion molding machine. 3. An extrusion molding machine utilizing ultrasonic waves, which is characterized in that an ultrasonic vibrator having a forming hole also serves as a die in a single extrusion molding machine and a composite extrusion molding machine.