JP2001038415A - Continuous extruder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous extruder which can prolong wheel life without imparing a cooling effect. SOLUTION: When a metallic material is extruded and molded, the groove 2a of a wheel 2 becomes hot due to friction and temperature difference occurs between the groove 2 and the neighborhood of a cooling passage 8a, thus causing thermal strain. By providing the cooling passage 8a on the side of the rotating wheel 2, the thermal strain caused inside the rotating shaft 2 is decreased, thus making it possible to prevent the strength decrease of the rotating wheel 2 in comparison with the through hole provided as the cooling passage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous extrusion apparatus called a "conform" for continuously extruding a metal raw material by a rotating wheel system, and more particularly to extending a wheel life without impairing a cooling effect. And a continuous extrusion device.

[0002]

2. Description of the Related Art FIG. 3 shows a basic structure of a continuous extruder. The continuous extruder is for forming a linear metal material 1 such as aluminum into a formed material 1 ′ having a desired outer diameter by a rotating wheel type, and a rotating wheel 2 having a groove 2a over the entire circumference; A rotating shaft 3 for rotating the rotating wheel 2 and a fixed shoe 4 provided to cover a part of the groove 2a of the rotating wheel 2 are provided. Fixed shoe 4
Has a die 4 having an inner diameter corresponding to the outer diameter of the molding material 1 '.
a.

In such a configuration, when the metal raw material 1 is supplied to the raw material supply path 5 formed between the groove 2 a provided in the rotating wheel 2 and the fixed shoe 4, the metal raw material 1 is provided at the back of the raw material supply path 5. The metal raw material 1 is pressurized by the abutment 4b, and the metal raw material 1 is in a plastic state, and a molding material 1 ′ having a desired outer diameter is extruded from the die 4a of the fixing shoe 4, and is formed.

FIGS. 4 and 5 show a conventional continuous extruder having the above-described basic configuration. This continuous extrusion device presses the housings 7A and 7B into the tapered collar 6 from both sides to thereby rotate the rotating wheel 2 to the rotating shaft 3.
Attached to. A cooling passage 8a is formed in the rotating wheel 2, and a cooling passage 8a is formed in one housing 7A.
A cooling supply path 8b for supplying a coolant to the cooling medium a is formed, and a cooling discharge path 8c for discharging the cooling medium from the cooling path 8a is formed in the other housing 7B.
When extruding the molding material 1 ′ from the metal raw material 1, a large amount of heat is generated due to friction, and the rotating wheel 2 is heated to a high temperature.
b, and discharged from the cooling discharge passage 8c of the housing 7B through the cooling passage 8a of the rotating wheel 2,
The inside of the rotating wheel 2 is cooled. A cooling discharge passage (not shown) extends from the cooling discharge passage 8c to the rotary shaft 3, so that the rotary shaft 3 can also be cooled. As a result, a rise in the temperature of the rotating wheel 2 can be suppressed to prevent a decrease in wear resistance, and the rotating shaft 3 is also cooled.

[0005]

However, according to the conventional continuous extruder, when extruding the molding 1 'from the metal raw material 1, the groove 2a of the rotating wheel 2 becomes hot due to friction, and the heat is generated by the rotating wheel. 2 and the cooling path 8
Since the cooling is rapidly performed in the vicinity of “a”, a remarkable temperature difference occurs between the groove 2 a and the vicinity of the cooling passage 8 a, and thermal distortion occurs radially from the shaft hole 2 b of the rotating wheel 2. When such thermal strain is repeatedly generated for a long time, the rotating wheel 2
Cracks occur in the cooling passage 8a, and eventually the rotary wheel 2 is cracked. If a crack occurs in the rotating wheel 2, it must be replaced, repair equipment costs are incurred, and productivity is significantly reduced due to the stoppage of the operation of the extrusion device.

Accordingly, an object of the present invention is to provide a continuous extruder capable of extending the life of a wheel without impairing the cooling effect.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a metal raw material based on the rotation of a wheel in a passage formed between a fixed shoe block and a circumferential groove of a rotating wheel. In a continuous extrusion device that extrudes a metal material formed from a die communicating with the inside of the passage by plasticizing the metal raw material at the back of the passage by pushing in, a concave cooling passage provided on the surface of the wheel; And a coolant supply means for cooling the wheel by supplying a coolant to the cooling path. According to the above configuration, when extruding the metal raw material, the circumferential groove of the wheel becomes high temperature due to friction, the heat is transmitted through the wheel, rapidly cooled near the cooling path, and the peripheral groove and the vicinity of the cooling path are cooled. Although a temperature difference is generated between the wheels to generate thermal distortion, the thermal distortion generated inside the wheel can be reduced. Further, by providing the cooling path on the surface of the wheel, it is possible to prevent the strength of the wheel from being reduced as compared with the case where the through hole is provided. As a result, even if thermal distortion is repeatedly generated for a long period of time, the occurrence of cracks in the wheel can be prevented. Further, by providing a concave cooling passage on the surface of the wheel, a cooling area equal to or larger than the through hole is secured, and a necessary cooling effect can be obtained.

[0008]

1 and 2 show a continuous extruder according to an embodiment of the present invention. This continuous extruder uses a rotating wheel type to feed a metal material 1 such as aluminum.
Is formed into a molding material 1 ′ having a desired outer diameter. As shown in FIG. 3, a rotating wheel 2 having a groove 2 a over the entire circumference, and a rotating shaft for rotating the rotating wheel 2. 3 and a fixed shoe 4 provided so as to cover a part of the groove 2a of the rotating wheel 2. Further, similarly to the conventional example shown in FIG. The rotating wheel 2 is attached to the rotating shaft 3 by press-fitting the rotating wheel 2 and a cooling unit (not shown) for cooling the rotating wheel 2 and the rotating shaft 3.

[0009] As shown in FIG.
An annular concave cooling passage 8a is formed on both side surfaces, and a cooling supply passage 8b for supplying a coolant (for example, cooling water) to the cooling passage 8a and a cooling passage 8a are provided in each of the housings 7A and 7B. A cooling discharge passage 8c for discharging the supplied coolant is formed, and a cooling discharge passage (not shown) extends from the cooling discharge passage 8c to the rotating shaft 3.

The cooling unit pumps the coolant and circulates the coolant pumped by the pump through the cooling passages 8a, 8b and 8c to cool the rotating wheel 2 and the rotating shaft 3. And a reservoir for receiving the cooled coolant. The supply amount of the coolant from the pump is adjusted so that the temperature difference between the high temperature portion and the cooling portion of the rotating wheel 2 does not exceed the range of the allowable thermal strain of the constituent material of the rotating wheel 2.

Next, the operation of the present apparatus will be described. As shown in FIG. 3, a groove 2a in which a metal raw material 1 is provided on a rotating wheel 2
When the metal material 1 is supplied to the material supply path 5 formed between the metal material 1 and the fixing shoe 4, the metal material 1 is pressurized by the abutment 4 b, and the metal material 1 is brought into a plastic state, and the metal material 1 is pressed from the die 4 a of the fixing shoe 4. A molding 1 ′ having an outer diameter is extruded and molded. On the other hand, the pump of the cooling unit
The coolant is supplied to the cooling supply path 8b of the housings 7A and 7B in the direction indicated by the arrow. The coolant is a concave cooling passage 8
a, and is discharged from the cooling discharge passage 8c of the housings 7A, 7B, partly flows toward the rotating shaft 3, and is collected in the reservoir. As a result, the metal material 1 is converted into the molding material 1 ′.
When extruding, a lot of heat is generated by friction,
Although the rotating wheel 2 and the rotating shaft 3 are heated to a high temperature, the rotating wheel 2 and the rotating shaft 3 are cooled by the cooling by the coolant.

According to the above-described apparatus, since the supply amount of the coolant is determined in consideration of the strength of the rotating wheel 2, the side surface of the rotating wheel 2 can be appropriately cooled. Further, by providing the cooling passage 8a in a ring shape on the side surface of the rotating wheel 2, a cooling area equal to or larger than the through hole is secured, and a necessary cooling effect can be obtained. Further, by providing the cooling path 8a on the side surface of the rotating wheel 2, the heat distortion generated inside the rotating wheel 2 can be reduced, and the strength of the rotating wheel 2 can be prevented from lowering as compared with the case where the through hole is provided. . As a result, even if thermal distortion is repeatedly generated for a long period of time, the occurrence of cracks in the rotating wheel 2 can be prevented. Further, since the rotating shaft 3 is sufficiently cooled, the life of the rotating wheel 2 and the rotating shaft 3 is greatly extended, and the productivity of the continuous extrusion molding can be remarkably improved.

The present invention is not limited to the above embodiment, but can be variously modified. For example, in the above embodiment, the cooling path is provided on the side surface of the rotating wheel.
It may be provided on the peripheral surface or the shaft hole. Further, the coolant may be supplied to the rotating wheel through the inside of the rotating shaft.

[0014]

As described above, according to the continuous extrusion apparatus of the present invention, since the cooling passage is provided on the surface of the wheel, the heat distortion generated inside the wheel can be reduced, and the through hole is provided. Therefore, even if thermal distortion is repeatedly generated for a long period of time, the occurrence of cracks in the wheel can be prevented, and the life of the wheel can be extended. Further, by providing a concave cooling path on the surface of the wheel, a cooling area equal to or larger than the through hole is secured, and a necessary cooling effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a continuous extruder according to an embodiment of the present invention.

FIG. 2 is a diagram showing a rotating wheel according to an embodiment of the present invention.

FIG. 3 is a diagram showing a basic configuration of a continuous extrusion device.

FIG. 4 is a longitudinal sectional view of a conventional continuous extrusion device.

FIG. 5 is a diagram showing a rotating wheel of a conventional continuous extrusion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal raw material 1 'Molding material 2 Rotating wheel 2a Groove 2b Shaft hole 3 Rotating shaft 4 Fixed shoe 4a Die 4b Abutment 5 Raw material supply path 6 Taper collar 7A, 7B Housing 8a Cooling path 8b Cooling supply path 8c Cooling discharge path

Claims (3)

[Claims] 1. A metal material is pushed into a passage formed between a fixed shoe block and a circumferential groove of a rotating wheel based on rotation of the wheel, and the metal material is plasticized deep in the passage. In a continuous extruder that extrudes a metal material formed from a die communicating with the inside of the passage by a die, a concave cooling path provided on the surface of the wheel, and supplying the coolant to the cooling path to form the wheel. A continuous extruder comprising: a cooling agent supply means for cooling. 2. The continuous extrusion apparatus according to claim 1, wherein said cooling passage is provided on a side surface of said wheel. 3. The wheel is fixed to a rotating shaft by a pair of housings provided on both sides of the wheel. The cooling path is provided annularly on both side faces of the wheel. And a discharge path for discharging the coolant supplied to the cooling path, wherein the cooling medium supply means supplies the cooling medium to the supply path and the cooling path. 2. The continuous extrusion apparatus according to claim 1, wherein said wheel is cooled by passing through said discharge passage.