JPS5890318A - Rotary wheel type continuous extruding device - Google Patents

Abstract

PURPOSE:To prevent damage and destruction of parts and safety of the titled device by separating the abutment from the outer peripheral groove when a detector that detects relative position of a rotary wheel and a fixed shoe detects previously fixed abnormal value. CONSTITUTION:When a driving shaft 11 is started and a material 19 is inserted into a passage 16 from an inlet port, the material 19 is sent into the passage 16 by frictional force of contact between both sides oif an outer peripheral groove, and when the material pressure is raised to required pressure, the material is extruded from an extruding die 18 as a product 20. The temperature of the rotary wheel 12 is nearly normal immediately after starting of operation, but it becomes very high with the lapse of time due to frictional heat. The wheel 12 and shaft 11 cause thermal expansion by the heat and the wheel 12 is thermally displaced in axial direction. The displacement is detected by a micrometer 29, and when the displacement becomes previously fixed abnormal value, a cylinder 25 is driven. Then, the whole of a fixed shoe 4 is raised upward and an abutment is taken off completely from the outer peripheral groove 13.

Description

[Detailed description of the invention] The present invention relates to a rotating wheel type continuous extrusion processing apparatus.

The rotary wheel continuous extrusion processing apparatus is basically constructed as shown in FIG. 3 is fixedly arranged, and the fixed shoe 5
As shown in the second figure, a segment 4 provided on the inner circumferential surface of the outer circumferential groove 2 is shallowly fitted into the outer circumferential groove 2 and partially covers it in the local direction.

An abutment 5 is provided at the end of the fixing shoe 3 and fits into the bottom of the outer circumferential groove 2, thereby closing one end of the passage formed by the outer circumferential groove 2 and the segment 4. Further, an extrusion die 6 that opens into the passageway in front of the abutment 5 is provided on the fixed shoe 3. Therefore, when the rotary wheel 1 is rotationally driven in the direction of the arrow and a material 7 slightly larger than the passage is fed from the opening side of the passage, the material 7 is partially deformed by the groove 2, and the material 7 and the outer periphery #lI2 As the wheel 1 rotates, it is drawn into the passage by the propulsive force due to the contact friction force between both sides of the wheel (
This area is called the primary grip zone. ),
In the abutment 5 (abutment 5, abutment grip zone), the material 7 yields and collapses, completely filling the groove 2, which reduces the frictional force between the groove 2 and the material 7 in the primary grip zone. It acts to enhance
As the wheel 1 rotates, the material pressure is further increased, and finally, when the material 7 is forced out of the extrusion die 6, the product 8 is continuously extruded from the extrusion die 6. In such a device, actually segment 4
And is there a small gap between abutment 5 and groove 2? + -9* (see Figure 2). This gap fI *fR determines the amount of flash escaping from it and therefore has a very large influence on the quality of the product 8.

On the other hand, although this device starts operating at room temperature, after the start of operation, the area around the wheel 1 of the device becomes as high as 500 to 600° C. mainly due to frictional heat. This heat generation thermally expands the wheel 1 and its driving shaft force, and the wheel 1 is displaced in the axial direction relative to the segments 4 and abutments 5.

As a result, the gaps V□ and t are no longer uniform, and uneven contact begins to occur, which may cause damage to the surface of the groove 2 by the segments 4 and abutment 5, or damage to the segments 4 and abutment 5 themselves.

In view of the above-mentioned current situation, the present invention aims to prevent the above-mentioned destruction accident and improve the safety of the device, and one embodiment thereof will be described below.

In FIG. 3, a drive shaft 11 is rotatably supported on the seven-lem main body 10, and this drive shaft 11 is driven by a motor (not shown). A rotating wheel 12 fixed to the drive shaft 11 has an outer circumferential groove 13, and a fixing shoe 14 is disposed in close opposition to the rotating wheel 12. The fixed shell 14 has a segment 15 on its inner circumferential portion that fits shallowly into the outer circumferential groove 13, and the outer circumferential groove 13 and the segment 15 form a passage 16 having a rectangular cross section in the shape of a tunnel. An abutment 17 protrudes from the end of the fixing shoe 14 and fits deeply into the bottom of the outer circumferential groove 13, and this abutment 17 closes one end of the passage 16. Furthermore, an extrusion die 18 that opens into the passage 16 near the closed part of the passage 16 is installed in the fixed shell 14, and the material 19 supplied from the insertion opening of the passage 16 (the right end in FIG. 4) is passed through the extrusion die 18. The product 20 is extruded from the product 18.

On the other hand, a frame 21 for supporting the fixed shell 14 is disposed on the upper surface of the seven-frame main body 10.

A guide groove 22 is vertically recessed in the hollow inner wall surface of the frame 21, and a protrusion 23 that protrudes from the outer surface of the fixed shade 14 is slidably fitted into the guide groove 22. There is. A cylinder 25, which is an example of a lifting drive device, is fixed to the upper surface of the support frame 21, and its operating shaft 25α
extends through the supporting frame 21, and the fixed shaft 14 is connected to the lower end thereof. Therefore, the fixed cylinder L-14 moves in the vertical direction (rotating wheel 1) by the operation of the cylinder 25.
It is possible to move up and down in the radial direction of 2).

Further, the shaft portion 28 of the crank lever 27 is rotatably fitted into a retainer 26 fixedly provided on the upper surface of the central opening of the frame body 10. A differential voltage electric micrometer 929, which is an example of a position detector, is attached to the tip of the crank lever 27 in order to detect the relative positional relationship between the rotating wheel 12 and the fixed seat. The tip of the detector 30 is part of the rotating wheel 12 (right side)
is in contact with.

Next, to explain the operation, when the drive shaft 11 is started and the material 19 is inserted from the passage 16 through its insertion port, the material 19 is pushed into the passage 16 by the frictional force of contact with both sides of the outer circumferential groove 13, as described above. The 0-rotation wheel 12, through which the product 20 is pushed out from the pushing die 18 when the material pressure is increased to the required pressure, is at approximately room temperature immediately after the start of operation, but as time passes, it becomes extremely hot due to frictional heat (
It varies depending on the material of material 19, but about 500℃~600℃
℃). This frictional heat is transmitted to the drive shaft 11 and the like, causing thermal expansion of the rotary wheel 12 and the drive shaft 11, thereby thermally displacing the rotary wheel 12 in the axial direction. This displacement is detected by a micrometer 29, and when this displacement reaches a predetermined abnormal value, the cylinder 25 is driven. Then, the operating shaft 25g of the cylinder 25 contracts, and the entire fixing shoe 14 moves upward so that the hair spring 17 is in the outer circumferential groove 1.
3 to a position where it is completely removed.

Note that the cylinder 25 of the lifting drive device and the electric micrometer 29 of the position detector are shown only as examples, and are not limited thereto.

According to the present invention described above, damage or destruction of parts can be prevented, the safety of the device is increased, and the operator can work with peace of mind.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the basic structure of a rotary wheel type continuous extrusion processing apparatus, and FIG. 2 is an enlarged sectional view taken along the line 1--1 in FIG. 1. 3 to 5 relate to one embodiment of the present invention, FIG. 3 is a partially sectional front view thereof, and FIG. 4 is a front view of the fifth embodiment.
Figure ■v - ■v 11m sectional view, and Figure 5 is its plan view. 10... Frame body 11... Drive shaft 12...
Rotating wheels 1 to 3...Outer circumferential groove 14...Fixed shade 15...Segment 16...fill
17...Annotation 18...Extrusion die 19...Material 20...Product 21.
... Support frame 25 ... Lifting drive device (cylinder) 251 ... Operating axis 29 ... Position detector (differential voltage electric micrometer or higher) Applicant Seikosha Co., Ltd. Agent Patent Attorney Mogami Figure 5

Claims (1)

[Claims] A drive shaft including a rotating wheel having an outer circumferential groove,
A fixed shade, which is rotatably supported by the seven-frame main body and is disposed close to and facing the outer periphery of the rotating wheel, corrugates a part of the outer periphery groove in the circumferential direction to form a tunnel of material. Rotating wheel type continuous extrusion comprising a segment forming a passage, an abutment that fits into the outer circumferential groove to close the terminal end of the passage, and an extrusion die opening into the passage near the closing part of the passage. In the processing device, seven support frames are arranged on the upper part of the frame main body, and the fixed shoe is arranged to be movable in the radial direction of the rotary wheel via an elevating drive device arranged on the support frame. A position detector is provided to detect the relative positional relationship in the groove width direction between the wheel and the fixed shaft, and when the detection value of the position detector detects a predetermined abnormal value, the lifting drive device is driven. and moving the fixed shell to a position where the abutment separates from the outer circumferential groove.