JPH03166909A - Method of molding fire-proof brick by friction press - Google Patents

Abstract

PURPOSE:To prevent body from being shocked by an excessively higher pressure and thus improve the quality stability of a molding by controlling the height of a screw in a friction press which gives body impact and the speed of a fly-wheel. CONSTITUTION:A friction press 1 is used in order that left and right press discs 5, 6 driven rotationally at constant speed by a driving motor 4 is pressed alternately to a fly-wheel attached to the upper part of a screw 2 via a cylinder disc control device 7, and through the ascent and descent of the screw 2, the body 9 in a mold frame 8 is beaten via an upper mold 10 so as to form fire- proof bricks. At this time, a screw guide rod 11 is attached to bearings 12 and further a position detecting rod 13 is disposed on the screw guide rod 11 wherein the position of the screw 2 or descent speed and ascent speed are detected by the detector 14 of a potention meter. And, the cylinder disc control device 7 is driven and controlled so as to control the screw 2 at predetermined speed and in consequence the body is beaten in order to make the quality of fire-proof bricks uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for shaping refractory bricks using a flixin press, and more particularly to a method for shaping refractory bricks using a flixin press that can stabilize the quality of the refractory bricks. Conventional technology Traditionally, the shape of refractory bricks made by flixin press was
This is done using methods such as setting the number of strokes of the press, controlling the pressing force, and controlling the size of the refractory bricks. The method for controlling the set number of strokes of the press described above is a method in which a refractory brick mold is filled with clay, and the molding is performed by repeating pressure with a friction press a set number of times through the upper die of the mold. It is. In addition, the pressure control method is the same set pressure force,
This is done by applying pressure with a flixin press for a predetermined period of time. In addition, the sizing control method involves filling a clay mixture into a refractory brick mold, pressurizing and compressing the clay mixture filled through the upper mold of the form with a flixin press, and compressing the clay mixture to a predetermined size. The molding is automatically completed when the dimensions are reached. Furthermore, there is a method in which these methods are combined to automatically complete the shape if the compact is compressed to a certain size within the set number of strokes and pressurization time. However, in the conventional method described above, the number of strokes and pressure of the Flixin press are set in advance based on experience, so there is a risk of wear and heat generation of the leather belt of the Flixin press.
The pressurizing force changed moment by moment depending on the temperature and humidity. Therefore, the number of strokes and pressure settings of the friction press are changed in response to these changes, but since the control of these changes is delayed, the quality of the molded product is unstable. there were. Problems to be Solved by the Invention In view of the above, a strain gauge has recently been attached to the main body of the Frixian press 6, and the number of strokes of a certain shape is controlled based on the applied E force value detected by this strain meter to perform an n-shape press. It is proposed that However, the applied pressure value detected by a strain meter has a large error.
Furthermore, although it is possible to control the number of molding strokes based on the measured pressure force value, it is not possible to control the pressure force itself, making it difficult to stabilize the quality of the molded product. Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has been made in view of the above-mentioned points. To provide a method for molding refractory bricks using a friction press, characterized in that the refractory bricks are molded by controlling the pressing force of a press disk and also by controlling the descending speed of the screw as described above. According to the present invention, by controlling the height of the screw and the speed of the flywheel by the pressing force of the press disk, it is possible to control the descending speed of the screw that applies an impact to the clay. The descending speed of the screw is closely related to the press force, so by controlling the descending speed of the screw, unnecessary pressure can be prevented and the quality of the molded product can be maintained at a constant level. EXAMPLES Hereinafter, the present invention will be explained based on examples.

Figure 1 and the following are one embodiment of the present invention. As shown in FIG. 1, in the friction press 1, left and right press disks 5 and 6, which are driven to rotate at a constant speed by a drive motor 4, are alternately connected to a flywheel 3 attached to the top of a screw 2 via a cylinder disk control device 7. The refractory bricks are pressed against each other, and the screw 2 is moved up and down to strike the clay 9 of the formwork 8 installed below through the upper mold 10, thereby shaping the refractory bricks. As shown in FIG. 1, a screw guide rod 11 is attached to the screw 2, which is driven up and down via the flywheel 3, and is vertically attached to the friction brace 1 using a linear bearing 12, and is positioned on the screw guide rod 11. The detection rod 13 is arranged to detect the detection l4 of the botensin meter.
This makes it possible to detect the position of screw 2, its descending speed, and its rising speed. The detector 14 of the potentiometer detects the position of the screw 2 by detecting the vertical position of the position detection rod 13 via the variable resistor 15 as shown in FIG.
The descending speed and rising speed of screw 2 are calculated as described below. Then, through a predetermined setting device IT (not shown), the cylinder disk control device W7 is deceptively controlled to press the press disks 5 and 6 against the flywheel 3, and the height of the screw 2 and the speed of the flywheel 3 are controlled. The descending speed of the screw 2 is freely adjustable. 16 is a power supply unit, and l7 is a recorder. This shows the relationship between the change in momentum of the refractory brick (C2) and the pressing force when the refractory brick is in its final shape. To measure the change in the momentum of the screw, use the above detector to measure the displacement of the screw guide rod every 5"Oms before and after the impact of the clay, calculate the screw speed by the first derivative of the displacement, and calculate the screw weight m1. From the speed Vl of the screw at the time of downward impact and the speed v2 at the time of repulsion, the amount of change in the momentum of the screw F is calculated as F=
It is obtained from the mX (v, -■,) formula.

As can be seen from the table, there is a linear correlation between the change in screw momentum and the press force.

Since the upward speed of the screw can be kept almost constant, the friction press can be driven to form refractory bricks based on the downward speed of the screw, and the quality of the refractory bricks can be made constant.

The higher the highest point of the screw, the higher the potential energy and the faster the screw descends.
The pressing force can be controlled by controlling the height of the screw.

The higher the screw speed, the greater the kinetic energy of the screw and the higher the pressing force, which can be controlled by the pressing force of the press disc. Effects of the Invention As described above, in the present invention, the pressure force of the friction press can be directly controlled by controlling the height of the clay impact screw and the speed of the flywheel.
This prevents the clay from being hit with more pressure than necessary and stabilizes the quality of the molded product. In addition, the load on the press body and mold can be reduced, increasing durability, and the molding time of refractory bricks can be shortened, improving the efficiency of molding refractory bricks.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of one embodiment of the present invention, Fig. 2 is a measurement circuit diagram of the detector part of the above, and Fig. 3 is the speed change and pressing force of the breath screw before and after the clay impact. This is a relationship diagram. 1...flixin press, 2...screw. Figure 1 Figure 2

Claims (1)

[Claims] (1) The height of the screw that applies the clay impact of the friction press and the speed of the flywheel are controlled by the pressing force of the press disk, and the refractory bricks are formed based on the above-mentioned control of the descending speed of the screw. A method for forming refractory bricks using a friction press.