JPH0512003Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a lining insert plate device for a square hole nozzle of a carbon extrusion press.

(Prior Art) It is desirable that the dimensions of a molded product extruded from a square hole nozzle of a carbon extrusion press be as close as possible to the dimensions of the final product in order to save on materials and processing costs. Therefore, a lining plate is attached to the inner surface of the nozzle so that it can be replaced depending on the product size.

Figures 9 and 10 relate to a conventional example in which four plate bodies 6', 7', 8', and 9' are lined on the inner surface of a square hole nozzle 1' of a carbon extrusion press. Ta. This inner lining consists of left and right plate bodies 8', 9' sandwiched between upper and lower plate bodies 6', 7', and a bolt 2 inserted from the outside of the nozzle 1'.
1' fixed the left and right plate bodies 8', 9' to the nozzle 1'.

(Problem to be solved by the invention) In the conventional device, the plate fixing bolt 2
It is necessary to provide an insertion hole 1' in the nozzle 1', and in order to maintain the strength of the nozzle 1', the nozzle wall thickness must be increased, which is a waste of material. There was a problem that heat transfer from the provided heater to the extruded material deteriorated.

In addition, due to the bolt tightening, the four plate bodies were insufficiently connected, and it was difficult for all the plate bodies to come into close contact with the inner surface of the nozzle, resulting in poor heat transfer.

Furthermore, since the bolts protrude from the nozzle surface, the mounting position of the heater is restricted, making it difficult to achieve efficient heat transfer.

The present invention aims to solve the above problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention takes the following measures. In other words, the features of this invention are:
The inner surface of the square hole nozzle of the carbon extrusion press is lined with four plate bodies, and the adjacent corner parts of the squarely assembled plate bodies are connected by a wedge, and the wedge is connected to the axis of the nozzle. When relatively moved in the center direction, each plate main body is pushed out toward the inner surface of the nozzle facing toward each other.

(Function) According to the present invention, the corner portions of the four squarely assembled plate bodies are wedge-connected, and when the wedge is relatively moved in the axial direction of the nozzle,
Each plate body is shaped to be pushed out toward the inner surface of the nozzle facing each other. Therefore, by pushing the wedge in, forces act on each plate body in two directions perpendicular to each other, and each plate body is pressed against the inner surface of the nozzle, so there is no need for fixing means such as bolts. It is tightly fixed to the inner surface of the nozzle.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 and 2 show a nozzle 1 of a carbon extrusion press, with a bayonet coupling device 3 attached to a container 2.
The raw material powder filled in the nozzle 1 and the container 2 is pushed out from the tip opening 4 by a ram (not shown) to obtain a molded product of a desired shape. Note that a heater (not shown) is arranged around the nozzle to heat the raw material.

The inner periphery of the tip of the nozzle 1 is a square hole, the inner surface 5 of which is lined with four plate (insert plate) bodies 6, 7, 8, 9, and the inner surface 10 of the rear end is made to gradually increase in diameter. It is connected to the inner surface of the container 2.

As shown in FIGS. 3 and 4, the upper and lower plate bodies 6, 7, 8, and 9 in FIGS. The rear end is formed into an inclined portion 12 that becomes gradually thinner. A concave groove 13 is formed in the thick portion 11 and opens into the nozzle from the nozzle tip toward the rear end. The bottom surface 14 of the groove 13 becomes gradually shallower from the nozzle tip to the rear end, and the distance between the side surfaces 15, 15 becomes gradually narrower from the nozzle tip to the rear end. Further, the rear end of the thick portion 11 is an inclined portion 16 that becomes gradually thinner.

As shown in FIGS. 5 and 6, the plate bodies 6, 7, 8, and 9 on the left and right in FIGS. 1 and 2 are rectangular plates, and the rear ends become gradually thinner. This is an inclined portion 17. A wedge 18 is integrally protruded from its upper and lower surfaces. This wedge 18 extends from the tip of the nozzle to the rear end,
The upper and lower wall thicknesses are gradually reduced, and the left and right widths are gradually reduced.

The nozzle inner surface 5 is lined with the plate bodies 6, 7, 8, 9 by first aligning the upper and lower plates 6, 7 along the upper and lower sides of the nozzle inner surface 5, then the left and right plates 8,
9 is inserted along the left and right sides of the inner surface 5 of the nozzle hole, and is held between the upper and lower parts 6 and 7. At the same time as this insertion, the wedge 18 is inserted into the groove 13. As a result, the plate body 6,
7, 8, and 9 are pressed against the nozzle inner surface 5.

Reference numeral 10 denotes a frame-shaped presser plate, which is attached to the tip of the nozzle 1 with bolts, so that it comes into contact with the tip surfaces of the plate bodies 6, 7, 8, and 9, and the plate bodies 6, 7, 8, and 9. This prevents the nozzle from slipping out of the nozzle hole.

7 and 8 relate to different embodiments, and the difference from the above embodiment is that the wedge 18 is shaped like a key separate from the left and right plate bodies 8, 9, and Similar to the grooves 13 of the upper and lower plate bodies 6 and 7, grooves 20 are provided on the upper and lower surfaces, the depth and width of which gradually decrease from the tip to the rear end of the nozzle. Thereby, after arranging each plate body 6, 7, 8, 9 along the nozzle inner surface 5, the key-shaped wedge 18 is inserted into the groove 13,
20 and press the plate bodies 6, 7, 8, 9 against the inner surface 5 to form an inner lining. That is, the wedge 18 is inserted between the opposing surfaces of the four plate bodies 6, 7, 8, 9, and
8 and 9 may be pressed against the nozzle inner surface 5.

(Effects of the invention) According to the invention, the lining plate body on the inner surface of the nozzle can be pressed against the inner surface using a wedge, and there is no need to attach it with bolts as in the conventional method. There is no decrease in strength, the nozzle can be made as thin as possible, and since the bolts do not protrude to the nozzle periphery, the heater installation space is not restricted and heat conduction from the heater to the raw material around the nozzle periphery is good. , high quality extruded products can be obtained.

[Brief explanation of drawings]

Fig. 1 is a sectional view of essential parts of a carbon extrusion press according to an embodiment of the present invention, Fig. 2 is a front sectional view thereof, Fig. 3 is a front view of the upper plate main body, Fig. 4 is a bottom view thereof, and 5 is a front view of the wedge and the side plate main body, FIG. 6 is a bottom view of the same, FIG. 7 is a front view of the wedge and the side plate main body according to different embodiments, and FIG. 8 is a front view of the wedge and the side plate main body.
The figure is a bottom view of the same side plate main body, FIG. 9 is a partial sectional view of a conventional carbon extrusion press, and FIG.
Figure 0 is a front sectional view of the same. 1... Nozzle, 5... Nozzle inner surface, 6, 7,
8, 9...Plate body, 18...Wedge.

Claims (1)

[Scope of utility model registration request] Inner surface 5 of square hole nozzle 1 of carbon extrusion press
is lined with four plate bodies 6, 7, 8, 9, and the squarely assembled plate bodies 6, 7,
Adjacent corner portions 8 and 9 are wedge-connected, and when the wedge 18 moves relative to each other in the axial direction of the nozzle 1, the respective plate bodies 6, 7,
A lining insert plate device for a square hole nozzle of a carbon extrusion press, characterized in that the lining insert plate device has a shape in which the nozzle inner surfaces 8 and 9 are extruded toward the opposing inner surface 5 side of the nozzle.