JPS63108191A - Hot press device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a press device for uniaxially pressing and sintering raw materials to be pressed such as ceramics, and in particular, to The present invention relates to a hot press device that can continuously perform molding.

[Prior art 1] Hot pressing of ceramics and the like is generally carried out by placing a mold filled with raw material powder to be pressed into a closed container and pressing it in a uniaxial direction in a vacuum or inert gas electric heating atmosphere. This produces dense fired crystals.

[Problem to be Solved by the Invention 1] However, most of the conventional hot press apparatuses are chamber-type batch furnaces, and the process from charging the mold to gas replacement, hot pressing, and cooling of the mold is performed. Only one piece can be processed in one cycle up to removal, and both productivity and heat exchange rate are poor.

On the other hand, multi-chamber semi-continuous furnaces have become popular in recent years, but they cannot be expected to significantly improve productivity, and equipment costs tend to be relatively high compared to production volume, so it is difficult to see any total benefits. There is a problem that is difficult to discuss.

The present invention has been made in consideration of the above circumstances, and provides a hot press device that enables complete continuous processing from supplying raw material powder to be pressed to taking out a pressed product within a mold forming a chamber. The purpose is to

[Means and effects for solving the problems] In order to achieve the above-mentioned object, the present invention has a method of forming a press material powder inlet on one side, a hot press product outlet on the other side, and a hot press product outlet. a cylindrical mold having a heating means for heating the raw material powder to be pressed; a raw material charging means for charging a predetermined amount of the raw material powder to be pressed into the mold from the inlet;
It is provided to reciprocate within the formwork from the input port side at a predetermined stroke, and sequentially presses the raw material powder to be pressed, which is input every predetermined meter from the input port side, to the press pedestal on the output port side. Hole 1 - A press ram means for sequentially moving the stacked pressed products to the press pedestal on the outlet side, and a press ram means for moving the pressed products in a stacked state to the press pedestal on the outlet side, and a press ram means for moving the pressed products in a stacked state, and a press ram means for moving the pressed products in a stacked state, and a press ram means for moving the pressed products in a stacked state, and a press ram means for moving the pressed products in a stacked state to the press pedestal. A mold release sub-supply means for supplying a mold release agent to the contact surface of the hot-pressed product and into the mold, and a product take-out device for taking out the hot-pressed product discharged from the take-out port to the press pedestal. By introducing the raw material powder to be pressed at a predetermined rate from the raw material powder inputting means, pressing it with the press ram means, and repeating this process in sequence, hot pressed products can be manufactured continuously. By supplying a mold release agent to the contact surfaces of hot-pressed products and the inside of the mold prior to the process, the hot-pressed products do not stick to each other and the pressed products within the mold can be smoothly moved to the outlet. This is what I did.

[Embodiment] A preferred embodiment of the pot press device of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a closed container, the inside of which is kept in a vacuum or inert gas atmosphere. A formwork 2 made of a cylindrical body is provided inside the container 1, and a heating means 4 made of a heating coil is provided on the outer periphery of the formwork 2 via a heating chamber heat insulating material 3.

A raw material powder inlet 5 is formed in the upper part of the mold 2, and a hot-pressed product outlet 6 is formed in the lower part.

A press ram means 8 is provided on the raw material powder inlet 5 side of the mold 2 for pressing the charged raw material powder 7 to be pressed.

This press ram means 8 consists of a press ram 9 that fits into the raw material powder inlet 5 of the mold 2 and a pressing cylinder 10 for reciprocating the press ram 9 by a predetermined stroke. A press ram 9 is attached to the top and is provided to reciprocate up and down within the closed container 1.

A press pedestal 11 is provided at the bottom of the closed container 1, and the press ram means 8 above the pedestal 11 presses the raw material powder 7 to be pressed in the mold 2.

The input port 5 of the formwork 2 is provided with means 12 for supplying a predetermined amount of pressed material powder 7 into the formwork 2.
and mold release sub-supply means 14 for supplying mold release agent 13.

The means 12 for supplying raw material powder to be pressed includes a raw material supply tank 15 provided above the input port 5 of the formwork 2 and surrounding the press ram 9, and a raw material supply tank 15 provided outside the closed container 1 for supplying the raw material powder 7 to be pressed. A storage tank 16 for storage, a gas exchange chamber 18 connected to the storage tank 16 via an upper gate valve 17, a gas exchange chamber 18 connected to the gas exchange chamber 18 via a lower gate valve 19, and a raw material supply tank connected to the gas exchange chamber 18 through a closed container 1. 15 and a supply pipe 20 facing inside.

Further, in the mold release sub-supply means 14, a mold release agent supply tank 22 is formed by a cutout step 21 formed at the upper inner periphery of the input port 5 of the mold 2 and the outer periphery of the raw material supply tank 15, and the mold release agent In order to supply the mold release agent 13 from the mold release agent storage tank 23 outside the closed container 1 to the supply tank 22, the −L portion gate valve 24. Gas replacement chamber 25. A lower gate valve 26 is connected, and the lower gate valve 2
6 is connected to a supply pipe 27 facing the swelling agent supply tank 22.

A take-out device 29 such as a hydraulic cylinder for taking out the hot-pressed product 28 discharged onto the press pedestal 11 is provided at the bottom of the closed container 1, and the hot-pressed product 28 is removed from the formwork 2 using the take-out bag @29. A take-out device 29 is provided for discharging the hot-pressed product 28 out of the closed container 1.

This takeout device 29 consists of a product takeout hole 31 provided at the bottom of the closed container 1, and upper and lower gate valves 3 are connected to the product takeout hole 31.
2.33 are provided, and a gas exchange chamber 34 is formed between the gate valves 32 and 33.

In the above, the mold 2 is formed to a size that allows 8!1 layers of a plurality of hot-pressed products 28 to be molded in sequence, and the heating means 4 is configured to heat the hot-pressed products 28 in the mold 2 in a predetermined heat pattern. It is divided into multiple zones for induction heating, and the temperature can be controlled in each zone. This heating means 4 determines the number of hot-pressed products 28 in the heating zone based on the relationship between the heating time of the hot-pressed products 28 and the production cycle time (removal cycle! vI), and at the same time determines the length of the heating zone. decide.

Also, a cooling zone 3 is located between the outlet 6 of the formwork 2 and the press pedestal 11.
5 is formed, and the hot-pressed product 28 is exposed from the mold 2 for cooling, and cooling is promoted by cooling the outside of the closed container 1 with water. The length of this cooling zone 35 and the number of products in the chamber are determined based on the relationship between the cooling time of the hot-pressed product 28 and the period of taking it out.

To perform hot press, first, when starting hot press,
Since the inside of the formwork 2 is empty, the formwork 2 is opened from above the press pedestal 11.
A dummy material (for example, graphite) is charged up to the upper part of the dummy material, and a predetermined amount of the raw material powder 7 to be pressed is supplied onto the dummy material from the raw material powder charging means 12, and at the same time, the mold is released from the mold release agent supplying means 14. After supplying the agent 13 to the inner surface of the formwork 2 above the dummy material, the press ram means 8 presses the raw material powder 7 to be pressed, and then one dummy material on the press pedestal 11 is removed using the take-out bag 2t30. As described above, the raw material powder 7 to be pressed is charged into the mold 2 and the release agent 13 is added.
is supplied and pressed by the press ram means 8, and by sequentially repeating this process, substantially continuous hot pressing can be performed.

The raw material powder 7 to be pressed and the mold release agent 13 are supplied from each storage tank 16.23 outside the closed container 1, and are supplied from each upper and lower gate valve 1.
7.24.19.26 are opened and closed alternately to open and close the gas exchange chamber 18.
．． By setting the pressure inside 25 to atmospheric pressure and the pressure inside the closed container 1, the hot-pressed product 28 can be supplied without any problem, and after the hot-pressed product 28 is also transferred to the take-out hole 31 by the take-out device 30, the upper and lower gate valves 32. 33 can be opened and closed alternately to adjust the pressure in the gas replacement chamber 34, thereby making it possible to take out the gas without any trouble.

Next, details of this hot press will be explained with reference to FIGS. 2 to 6.

Fig. 2 shows a hot-pressed product 2 to be heat-treated after the raw material powder 7 to be pressed is charged and pressed by a press ram.
8a is located at the top of the formwork 2.

As shown in FIG. 2, the pressing part 9a of the press ram 9 is placed in a position Δ such that it covers the lower part of the raw material supply tank 15, and in this state, the mold release agent is inserted into the lower gap 36 of the mold release agent supply tank 22. 1
Supply 3. Next, as shown in FIG. 3, the pressing part 9a of the press ram 9 is raised to position B of the enlarged hopper part 15a at the upper part of the raw material supply tank 15, and a predetermined amount of raw material powder to be pressed is placed in the raw material supply tank 15. 7 and is pressed by the pressing portion 9a of the press ram 9 as shown in FIG. Along with this pressing, the release agent is supplied (release agent 13 in n22).
is sequentially supplied between the raw material powder 7 to be pressed and the inner surface of the mold 2 through the gap 36.

The pressing part 9a of the press ram 9 is moved to a position C that closes the upper part of the formwork 2 as shown in FIG.
After compressing for a certain period of time, the hot-pressed product 28 on the press pedestal 11 is removed, and as shown in FIG. is pressed down to move each hot-pressed product 28 in the formwork 2 downward.

Thereafter, the suppressor 9a is pulled up to the position shown in FIG. 2 and the above-described operation is repeated.

The hollow 1-pressed product 28 in the formwork 2 is press-molded and then heat-treated through the heating means 4, exposed to the atmosphere inside the closed container 1 from the outlet 6 of the formwork 2, and the press pedestal It is cooled in a cooling zone 35 between 11, reaches the upper surface of the press pedestal 11, is taken out by a take-out device 30, is transferred to a take-out hole 31, is discharged outside the closed container 1, and is collected.

[Effects of the Invention] As is clear from the detailed description above, the present invention exhibits the following excellent effects.

(1) By putting the raw material powder to be pressed at a predetermined temperature into the mold and compressing it, and repeating this process in sequence, continuous hot pressing can be performed, which improves productivity and enables mass production.

(2) The formwork is fixed and the formwork is taken into the furnace.

Since there is no need to take out the mold, it not only saves labor in handling, but also eliminates the obvious loss associated with heating and cooling the formwork, greatly improving the heat exchange rate.

(3) In addition to putting the raw material powder to be pressed into the mold, a release agent is also added to prevent the hot-pressed products from joining together, so each hot-pressed product can be separated and taken out, eliminating the need for a cutting process. Allows for smooth movement within the formwork.

(4) Because the formwork has a compact single-chamber structure, equipment costs are lower than multi-chamber types, and by reducing utility consumption and improving productivity, it contributes to lower product costs.

[Brief explanation of the drawing]

FIG. 1 is an overall sectional view showing one embodiment of a hot press apparatus of the present invention, and FIGS. 2, 3, and 4. FIGS. 5 and 6 are sectional views of essential parts for explaining one cycle of hot pressing in FIG. 1. In the figure, 2 is a mold, 4 is a heating means, 5 is an inlet for powder to be pressed, 6 is an outlet for hot-pressed products, 7 is a powder to be pressed, 8 is a press ram means, 11 is a press pedestal, 12
13 is a release agent, 14 is a release agent supply means, and 28 is a hot press product. Figure 1 Figure 5 Figure 6

Claims (1)

[Claims] A cylindrical formwork having one side forming an inlet for the raw material powder to be pressed and the other forming an outlet for taking out the hot-pressed product, and having a heating means for heating the raw material powder to be pressed; a means for charging raw material to be pressed into which a predetermined amount of raw material powder to be pressed is input; A press ram means for sequentially pressing the raw material powder to be pressed and sequentially moving the hot-pressed products in a stacked state to an outlet, and prior to inputting the raw material from the raw material powder inputting means,
A mold release agent supply means for supplying a mold release agent to the contact surface of the hot-pressed product that has been previously input and pressed and into the mold, and a product for taking out the hot-pressed product discharged from the above-mentioned take-out port to the press pedestal. A hot press device comprising a take-out device.