JP2001198617A - Rotary wheel type continuous extrusion machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary wheel type continuous extrusion machine with which a material is heated to a prescribed temperature from both sides of a die chamber and a movable wheel from the begining of starting extrusion and this temperature is maintained. SOLUTION: A heating means is provided for the die chamber and the movable wheel of the extrusion machine with which the material supplied into the groove of the movable wheel is fed into the die chamber and extruded from the die hole of the die chamber as a product. The heating means for the movable wheel consists of the heaters which are provided at fixed intervals in the circumferential direction just under the groove of the mavable wheel. By connecting the heating means of the movable wheel electrically to a slip ring which is connected to the rotary shaft of the movable wheel, a power source is supplied even when the movable wheel is rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary wheel type continuous extruder for extruding a material continuously supplied along a groove of the rotary wheel while heating the extruded material.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional rotary wheel type continuous extruder, and FIG. 5 shows a cross section taken along line AA in FIG.

[0003] In this conventional rotary wheel type continuous extruder, a movable wheel 1, a die chamber 2, a pressing roll 3a, a scraper 3b, an abutment 4 and the like are provided in an extruder main body 3.

The movable wheel 1 has two parallel grooves 1a, 1a formed over the entire outer peripheral surface thereof.
It is made rotatable in the direction of the arrow r shown in the figure, and is rotated by driving and rotating the rotating shaft 1b by a driving device (not shown).

The die chamber 2 has an extrusion chamber 2a and a die hole 2b formed therein.
The material is supplied to the extrusion chamber 2a through the abutment 4 that dams the material supplied to the extrusion chamber 2a. Die chamber 2
A heating plate 6 having a built-in heater 5 is arranged in close contact with the outside.

[0006] The pressing roll 3a and the scraper 3b
It is arranged on both sides of the movable wheel 1. The pressing roll 3 a presses the wire 10 a against the groove 1 a of the movable wheel 1. The scraper 3b is provided with an acute angle portion at the tip thereof, which is in contact with the groove 1a of the movable wheel 1, and is slidably provided as the movable wheel 1 rotates.

Next, the operation of the rotary wheel type continuous extruder having such a configuration will be described. Before the start of the extrusion, the inside of the extrusion chamber 2a inside the die chamber 2 is heated to a predetermined temperature by the heater 5 built in the heating plate 6.

Next, a stick 10b obtained by cutting the wire 10a into a short length as shown in FIG. 6 is inserted into the groove 1a of the movable wheel 1 from under the pressing roll 3a.
At low speed. At this time, the inserted stick 1
Ob flows into the extrusion chamber 2a after colliding with the abutment 4, but the stick 10b is continuously supplied thereafter, so that the pressure in the extrusion chamber 2a gradually increases. Further, frictional heat is generated between the stick 10b, the groove 1a, and the abutment 4, and the stick 10b is in a high-temperature semi-molten state. As a result, the coating state is formed in the groove 1a of the movable wheel 1 by adhering the material so as to fill a slight gap provided for preventing galling between the abutment 4 and the groove 1a. can get.

When this coating is formed, the material does not flow out as a burr from the gap between the abutment 4 and the groove 1a, and the inside of the extrusion chamber 2a becomes more and more high temperature and high pressure. It is extruded as a product from the die hole 2b.

Thereafter, two wires 10a are inserted into the respective grooves 1a, and the movable wheel 1 and the pressing roll 3a are inserted.
Continuous extrusion is started by continuously feeding with a frictional force between.

[0011]

In the rotary wheel type continuous extruder having the above-described structure and operation, when the extrusion is started, the stick 10b is inserted into the groove 1a.
In the initial state, the stick 10b and the movable wheel 1
Since the temperature of the stick 10b does not reach a sufficient temperature, that is, it is in a low temperature state, the deformation resistance when the stick 10b collides with the abutment 4 is large, and the abutment 4 may be broken.
Also, it is difficult to obtain a coating formed in the groove 1a of the movable wheel.

In order to solve such a problem, the stick 10b is sufficiently heated beforehand, and thereafter, the stick is inserted into the groove 1a of the movable wheel.
Even in this case, the movable wheel 1 was in a low temperature state, which caused the temperature of the stick 10b to drop, and the sufficient effect of the above-mentioned heating could not be expected.

For this reason, conventionally, at the start of extrusion, the state of the coating in the groove 1a of the movable wheel and
The movable wheel 1 had to be rotated at a very low speed while monitoring the temperature and the like of the die chamber 2 with a measuring device (not shown), which required a great deal of time and effort to start continuous extrusion.

If the coating is not formed on the groove 1a of the movable wheel, the material will flow out between the groove 1a and the abutment 4 as burrs, and the pressure in the extrusion chamber 2a will not increase, and the extrusion will not proceed. There is also a problem of instability.

It is an object of the present invention to provide a rotary wheel type continuous extruder which can be heated to a predetermined temperature from both sides of a die chamber and a movable wheel from the beginning of extrusion and can maintain the temperature.

[0016]

SUMMARY OF THE INVENTION A rotary wheel type continuous extruder provided by the present invention comprises an extruder which feeds a material supplied to a groove of a movable wheel into a die chamber and extrudes a product from a die hole of the die chamber. The heating means is provided in the die chamber and the movable wheel.

To heat the movable wheel, it is conceivable to heat the wheel before the start of extrusion, that is, before the rotation. However, this heating alone lowers the temperature during the subsequent setup. Also decided to heat the movable wheels.

A preferred mode of the heating means for the movable wheel comprises heaters provided at equal intervals in the circumferential direction immediately below the groove of the movable wheel.

The heating means for the movable wheel is electrically connected to a slip ring connected to a rotating shaft of the movable wheel, so that power can be supplied even when the movable wheel rotates.

[0020]

FIG. 1 shows a rotary wheel type continuous extruder according to an embodiment of the present invention in a partially sectional view. FIG. 2 shows a movable wheel in the extruder, and FIG. 3 shows left and right rings of the movable wheel in the extruder.

The rotary wheel type continuous extruder of this embodiment comprises a movable wheel 1 supported by a rotary shaft 1b with respect to an extruder main body 3, and a die chamber 2 engaged with the outer peripheral surface of the rotary wheel 1. The rotary wheel 1 is a main component of the extrusion, and has two grooves 1a, 1a formed on the outer circumference in parallel on the entire circumference. The rotating wheel 1 is set at a predetermined position on the rotating shaft 1b while being held between the rings 8a and 8b from the side.

The die chamber 2 has an extrusion chamber 2a formed at a position engaging with the outer peripheral surface of the movable wheel 1; a position facing the grooves 1a, 1a, and a die hole 2b connected to the extrusion chamber 2a.
Is formed. Further, an abutment 4 serving as a barrier to the grooves 1a, 1a is provided.

In the rotary wheel type continuous extruder having such a main structure, a heating plate 6 with a built-in heater 5 is attached to the outside of the die chamber 2 so as to be in a tightly enclosed state. Further, the movable wheel 1 itself is also provided with a heater 7, and a slip ring 13 is attached to the rotating shaft 1 b corresponding to the heater 7. A brush 14 slides on the slip ring.

As shown in FIG. 2, the heater 7 on the side of the movable wheel 1 has grooves 1a,
It is located just below 1a and is provided at equal intervals in the circumferential direction, and itself is made of an electric resistance heating element, and therefore a power supply cable 7a is attached.

One side of the movable wheel 1; the power supply cable 7a of the heater 7 on the left surface is connected to the movable wheel 1
Through the passage 9a provided on the surface of the ring 8a adjacent to
Further, the vehicle reaches a right surface of the movable wheel 1 through a passage 10 passing through the movable wheel 1 provided on an inner surface of the movable wheel 1. The power supply cable 7a for the heater 7 on the right surface of the movable wheel 1 also passes through the passage 9b provided on the surface of the right ring 8b, and is provided on the inner surface of the ring 8b together with the cable 7a for the heater on the left surface. Ring 8
b. Next, these cables pass through the passage 12 around the rotation axis shown in FIG.
Is connected to a slip ring 13 attached to the rotating shaft 1b. 14 is a brush. The passage 12 is a passage provided inside a component that rotates integrally with the rotating shaft 1b. Accordingly, when the extruder operates and the rotating shaft 1b starts rotating, the movable wheel 1, the rings 8a and 8b, the components forming the passage 12, the rotating shaft 1b, and the slip ring 13 all rotate integrally, so that the extruding is performed. Inside heater 7
To heat the movable wheel 1.

Next, the operation of the rotary wheel type continuous extruder of this embodiment will be described. First, the die chamber 2 and the extrusion chamber 2a are heated by the heater 5. Further, the movable wheel 1 and the groove 1a are heated by the heating heater 7 load. At this time, the rotating shaft 1b and the rings 8a, 8b are provided with a cooling and heat insulating structure (not shown) to minimize heat conduction to parts other than the movable wheel 1. After the die chamber 2, the extrusion chamber 2a, and the movable wheel 1 reach a predetermined temperature, the stick (see FIG. 6) is moved to the groove 1 of the movable wheel.
Then, the movable wheel 1 is rotated at a low speed to start extrusion.

The supplied stick is pulled in by the frictional force and collides with the abutment 4. However, since the groove 1a of the movable wheel 1 is sufficiently heated, the stick is continuously supplied to generate the stick. The material is fed into the extrusion chamber without losing heat. Therefore, it is possible to prevent the deformation resistance of the material from increasing due to the temperature drop and prevent the abutment 4 from being broken. Further, since the tools such as the die chamber and the movable wheel are maintained at a high temperature, the material is brought into a semi-molten state early, a coating is formed in the groove 1a, and the material is prevented from flowing out as burrs. . As a result, the pressure in the extrusion chamber is stabilized, and the extrusion is also stabilized.

As described above, according to the rotary wheel type continuous extruder according to this embodiment, since the movable wheel is preheated, the start-up of the extrusion becomes easy, and the deformation resistance of the material is reduced. By lowering, there is an effect that breakage of a tool such as an abutment can be prevented.

The arrangement of the heater on the movable wheel 1 differs from that of the above-described embodiment in that the stick-shaped heaters 7 are arranged at equal intervals in the circumferential direction, and a ring-shaped heater is provided on the movable wheel. Mounting along the circumferential direction is also possible.

[0030]

As described above, according to the present invention, there is provided a rotary wheel type continuous extruder capable of heating to a predetermined temperature from both sides of a die chamber and a movable wheel from the beginning of extrusion and maintaining the temperature. The intended task of providing; the goal can be achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a rotary wheel type continuous extruder according to the present invention in a partially sectioned manner.

FIG. 2 shows a movable wheel of the extruder in FIG. 1,
(A) is a sectional view, and (b) is a side view.

FIG. 3 shows left and right rings of the extruder in FIG. 1,
(A) is a sectional view and a side view of the right ring, and (B) is a sectional view and a side view of the left ring.

FIG. 4 is an explanatory side view showing an example of a conventional rotary wheel type continuous extruder.

FIG. 5 is a sectional view of a portion taken along line AA in FIG. 4;

FIG. 6 is a perspective view showing a wire stick.

[Explanation of symbols]

 Reference Signs List 1 movable wheel 1a groove 1b rotating shaft 2 die chamber 2a extrusion chamber 2b die hole 3 extruder body 3a pressing roll 3b scraper 4 abutment 5 heater 6 heating plate 7 heating heater 7a power supply cable 8a left ring 8b right ring 9a passage 9b passage 10 passage 10a wire rod 10b stick 11 passage 12 passage 13 slip ring 14 brush

Claims (3)

[Claims] A movable wheel having a groove on an outer periphery thereof; and a die chamber engaged with an outer peripheral portion of the movable wheel, wherein a material supplied to a groove of the movable wheel is fed into the die chamber, and A rotary wheel type continuous extruder, wherein a heating means is provided in a die chamber and a movable wheel of an extruder for extruding a product from a die hole. 2. The rotary wheel type continuous extruder according to claim 1, wherein said heating means for said movable wheel comprises heaters provided at equal intervals in a circumferential direction immediately below a groove of said movable wheel. 3. The rotating device according to claim 1, wherein the heating means of the movable wheel is supplied with power by being electrically connected to a slip ring connected to a rotating shaft of the movable wheel. Wheel type continuous extruder.