JPS62151304A - Method and device for manufacturing extrusion-molded cement group product - Google Patents

Abstract

(57) [Summary] 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 is a process in which a long member made of a cement-based inorganic material is extruded to have a predetermined cross-sectional shape, is cut to a certain length, and then cured. The present invention relates to a manufacturing method and an apparatus for the same.

(Prior art) When manufacturing small columnar parts with a predetermined cross section, molding them one by one, regardless of the material, increases the number of man-hours even if press molding is used, and the dimensional accuracy of the parts is affected. Also/unevenness occurs. Therefore, even in the case of extrusion-molded parts made from cement-based inorganic materials, it is more convenient to extrude them as long pieces of a certain length and then cut them into fine pieces of predetermined dimensions. However, if the cutting was performed after the extruded long material had hardened, the process would be too slow! 1! Because the cutting process is time-consuming and the tool wears out quickly, care is taken to ensure that the cutting process is done before curing and that the shape does not collapse during cutting and subsequent transportation and drying. By the way, Utility Model Publication No. 59-7052 (clay material cutting machine) is known as a conventional example of a device for cutting such an extruded product of cement material. The device has a tank filled with clay material, has a discharge pipe at the lower end of the tank, and has two fixing plates drilled with holes communicating with the discharge pipe fixed parallel to each other at an appropriate interval. The clay material extruded from the tank is cut into a fixed size by a movable plate that slides between the two fixed plates by cylinder operation. but.

The purpose of this cutting machine is different from that of the cutting equipment used in the manufacturing process of the present invention, and it is intended to accurately cut a selected amount, and there will be no problem if the shape of the extruded clay material is distorted during cutting. Since there is no cutting board, cutting is performed by sliding a movable plate and using a push cutter. On the other hand, there is a device disclosed in Japanese Patent Publication No. 14284/1984 that cuts extruded clay with high precision while maintaining the perpendicularity of the cut surface. This device feeds the clay extruded from the mold onto the conveyor of a trolley, restricts the extruded clay for a certain length with a backing plate, and then moves the clay at the extrusion speed and attaches it to the trolley. Cutting is performed using a cutting member that is attached to the cutting member. The present invention also accurately cuts a cement-based member extruded into a predetermined cross-sectional shape to a certain length, and it is necessary to perform cutting based on the latter idea. The cutting speed is slow, and if the length of the cut parts is short, it is difficult to cut many pieces at once. In many cases, it is not possible to obtain an accurate cut surface using push-cutting. Furthermore, with this device, the cut member must be transported so as not to lose its shape and left to harden, which requires a long time for the transport device and for curing.

(Problems to be Solved by the Present Invention) As described above, in manufacturing cement-based parts obtained by extruding a cement-based material from a mold and cutting it into a predetermined length before it hardens, It is not possible to manufacture such parts at high speed with high dimensional accuracy and vertical surfaces with no wobbling on the cut surface, and also requires large attached equipment and a long time to harden the parts after cutting. The increase in man-hours and equipment will greatly affect costs. The invention was developed with the aim of solving these problems.
To provide a manufacturing method and apparatus for cutting an extruded cement-based member at high speed and hardening it to an extent that it does not deform in a short time.

(Means for Solving the Problems) The present invention aims to extrude a cement-based inorganic material and cut the extruded member into relatively short lengths. Multiple parts are cut and divided at the same time depending on the length of the part. Therefore, multiple cutters are attached, and glass fiber etc. are used as reinforcing material? In order to be able to cut the cut surface with high precision without sagging even when the cut surface is exposed to the cutting edge, a thin disk is used as the cutter, and the cutter cuts while being rotated by a motor. By the way, the above extrusion is performed continuously, and in order to cut the parts that are continuously extruded from the mold, the cutter must be moved in the extrusion direction at the same speed as the extrusion speed. A sensor is installed for detection. A sensor is also provided to detect the length of the extrusion member so that the cutter is activated when the extrusion member is extruded to a certain length.

Therefore, after the member is extruded to a certain length by the action of both sensors, the cutter is activated, and the cutter cuts the member while moving in synchronization with the extrusion speed. After cutting, the cutter is pulled back to its original position, and the cutter is attached and the pedestal that was moved with the extrusion is returned to its original position.The individual cut parts are pushed out by continuous extrusion from the mold. hot water (generally 70℃)
Drop and submerge in 1 step at ~90℃). This takes advantage of the property of cement and thickener that clay decreases under high temperature. In addition, in order to prevent the position of the extruded member from changing when it is cut, a jig with a concave groove for kiting the member and a narrow horizontal groove for the canter to pass through is used. The extrusion member is guided to the jig.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

(Example) Fig. 1 shows one form of the manufacturing apparatus according to the present invention, and shows its main parts. The extruded member 2 is extruded from a mold 1 to have a predetermined cross-sectional shape, but the type, shape, and material of the extruded member are not limited.

The manufacturing apparatus according to the present invention is suitable for manufacturing small parts of short length, such as reinforcing bar separators as shown in FIG. 2, by simultaneously cutting a large number of small parts from the extruded member. These parts are made of, for example, cement mixed with sand, asbestos, a thickener, an adhesion improver, water, and alkali-resistant glass fiber as a reinforcing agent. The member 2 enters a jig 3 which has a concave groove that guides the lower end surface and both side surfaces of the member 2, and a chain 6 is connected to both sides of the jig 3 with rollers 5, 5, and so on sandwiched therebetween. , a chain 6 is wrapped around a sprocket, door 7, which are pivoted at a certain distance,
The member 2 extruded from the mold 1 is the roller 5.
... is guided to the jig 3 by sliding on the top. The member 2 guided to the jig 3 is cut by the cutter 4.
is in the shape of a disk with a thickness of 11D, and a plurality of them are fixed at a constant pitch at @lI8. The shaft 8 is supported by arms 9, 9 hanging down from the base 10, and a pulley 11 is attached to the shaft 8, which receives power from a motor 12 mounted on the base 10. belt 1
3 to rotate the shaft 8 as well as the canter 4. A base 1 is equipped with the motor 12, cutter 4, etc.
0 is supported on a rail 16 by a support roller 14, and the base 10 can run on the rail 16 in a direction perpendicular to the plane of the paper via the support roller 14. Attach rail 16
It restricts the inner surface.

On the other hand, two sensors 1 are placed at the positions extruded from the mold l.
7.18 is attached, and one sensor 17 is for detecting the distance, and when the length of the extruded member 2 reaches a predetermined position, the base 10 starts moving in the extrusion direction. and is for operating the cutter 4,
Another sensor 18 serves to synchronize the movement speed of the base IO with the extrusion speed of the part 2. therefore.

As the sensors 17 and 18, any suitable sensor can be selected and used as long as it exhibits the above function. Fig. f33 and Fig. 4 are schematic diagrams of the device, and as is clear from Fig. 3, the motor 1
2 and a cutter 4 mounted thereon runs left and right on a rail 16. As the base 10 travels, the extrusion member 2 is cut by the rotation of the cutter 4. An air cylinder may be used as a means for driving the base 10, and a cylinder may be installed in parallel on the rail 16. , a rack-binion mechanism may be used in which a pinion driven by a separate motor is engaged with the rack.On the other hand, as described above, the base 10 and the jig 3 may be connected together with respect to the base 10 that runs left and right on the page. It has a supporting stand 19, which moves on rails 20 in a direction perpendicular to the plane of the paper. Similarly to the base 10, the support roller 2 is also provided on the mount 19.
1 is pivotally supported, and the inner surface of the rail 20 is guided by a guide roller 22. The movement of the pedestal 19 is driven by a motor 23 attached to a pedestal 25 provided on the frame 24, and sprockets 26 and 27 are installed at a certain distance on both outer sides of the rail 20 on which the pedestal 19 moves. A chain 28 is wound around these sprockets 26 and 27, and the chain 28 is attached to one of the sprockets 26 and 27.
The two points are fixed to the frame 19, and a single nuclear chain 28
When the chain runs due to the rotation of the sprockets 26 and 27, the pedestal 19 moves on the rail 20 together with the chain. The sprocket 26 is connected to the motor 23 via a chain 29, and the pedestal 19 moves in synchronization with the speed of the pushing member 2 detected by the sensor 18. Of course, if the pedestal 19 moves, the base lO mounted within the pedestal 19 will also move.

By the way, the extrusion member 2 is continuously extruded from the mold 1 and cut into a certain length by a cutting device, and the cut individual reinforcing bar separators 30 move on the rollers 5 of the chain 6. and.

The end sprocket 7 around which the chain 6 is wound
A container 31 is arranged below the container 31, and the container 31 contains 7
It is filled with hot water 32 having a temperature of about 0°C to 90°C.

To explain the processing process using this device below, an extrusion member 2 is continuously molded from the mold 1, and the extrusion member 2 is supported by a roller 5 and is supported by a concave groove of a jig 3. Go inside. The sensor 17 constantly detects the length of the extruded member 2 extruded from the mold l, and when the length reaches a certain value, the motor 23 is activated and the pedestal 19 is moved. Furthermore, since the moving speed of the frame 19 must be synchronized with the extrusion speed, the speed of the extrusion member 2 is detected by the sensor 18, and the rotational speed of the motor 23 is controlled. Therefore, the movement of the pedestal 19 results in the movement of the base 10, and the cutter 4 and jig 3 move at the same speed as the extrusion member 2. At the same time as the cutter 4 starts moving, the motor 12 operates to rotate the cutter 4, and the cutter 4 rotates while rotating the base 1o.
moves along the rail 16 and cuts the extrusion member 2 guided into the jig 3 into a predetermined length. That is, each cutter 4,4... passes through the horizontal grooves 33,33,... of the jig 3, so that it is cut to a length between the horizontal grooves 33,33. Of course, the movement of the pedestal 19 continues even during cutting, and continues until the cutting is completed and the cutter 4 is returned to its original position (more precisely, until it leaves the cut extrusion member 2),
When the motor 23 returns to its original position, the motor 23 stops, and the frame 19 is also returned to its original position by reverse rotation.
... sequentially moves on the rollers 5 of the chain 6, is dropped from the sprocket 7 into the container 31, and settles.

The embodiment described above is only one example of the present invention, and the present invention is not limited to the embodiment, but the following effects can be obtained.

(Effects) (1) Manufacturing of cement-based products such as reinforcing bar separators according to the present invention is carried out in a continuous extrusion process from a mold, so that there is no variation in the external dimensions of the extruded member 2, and there is no variation in the internal dimensions. The structure also becomes continuous and uniform.

(2) This device uses multiple cutters 4.4 arranged and fixed at regular intervals to cut multiple parts at once, so the cutting process is low and the cutting process is easy. The length of the part is determined by the pitch between the cutters 4.4 and is made uniform.

(3) Also, in the cutting process, the extrusion member 2 is removed from the mold 1 and
This is done in the subsequent extrusion process, and the cutters 4, 4, etc. must cut while moving in synchronization with the extrusion speed. A sensor is installed to directly detect the cutter 4, 4, etc. by the signal from the sensor.
・Since the movement of the cutter 4.4 is controlled, the cut surface of the part can be cut vertically. Even if fibers such as glass fibers are mixed into the material, it can be cut without any resistance.

(5) On the other hand, the cut parts are dropped into hot water and do not receive a large impact, and even if they are extruded materials that do not harden, they settle to the bottom without losing their shape. In addition, thickeners are mixed into the raw materials to facilitate extrusion molding.
Methylcellulose and cement, which are often used as thickeners, are at high temperatures! (in a region exceeding 50°C), the viscosity decreases extremely, and the precipitated parts harden in a short period of time to the extent that they do not deform. Therefore, a series of manufacturing steps can be completed in a much shorter time than when natural curing at room temperature is used.

[Brief explanation of drawings]

FIG. 1 shows an example of a manufacturing device according to the present invention and its main parts, FIG. 2 shows an example of a part to be cut by uJ using the device, and FIGS. FIG. 3 is a schematic diagram of the apparatus, and FIG. 3 is a front view, and FIG. 4 is a side view.

Claims (3)

[Claims] (1) Manufacture of cement-based products obtained by continuously extruding a raw material whose main component is cement-based inorganic material from a mold of a predetermined shape, cutting the extruded member into a certain length, and then curing it. A method for producing a cement-based product to be extruded, characterized in that the parts cut to a certain length are precipitated in hot water heated to about 70°C to 90°C to harden them. (2) A raw material whose main component is a cement-based inorganic material is continuously extruded from a mold of a predetermined shape, the extruded member is guided to a jig having a groove, and the extruded material is extruded from the mold. The length and speed of the member are detected, and when the extrusion member reaches a predetermined length, a plurality of thin disc-shaped cutters fixed at regular intervals to a shaft driven by a motor are pushed out. moving the extrusion member along with the jig in the extrusion direction at the same speed as the extrusion speed and cutting the extrusion member guided into the jig into a plurality of uniform lengths while rotating the cutter;
A method for producing an extrusion-molded cement-based product, which comprises dropping individual cut parts into hot water at about 70°C to 90°C to precipitate them. (3) In a device that cuts an extruded member into a certain length by extruding a raw material mainly composed of cement-based inorganic material from a mold of a predetermined shape, the length of the extruded member extruded from the mold and the extrusion A jig equipped with a sensor to detect speed and for positioning the extruded member during cutting, which has a plurality of concave grooves in the extrusion direction and narrow lateral grooves in a direction perpendicular to the extrusion direction at regular intervals. The formed product is provided on an extension of the mold, and a plurality of thin disk-shaped cutters are fixed to a shaft rotated by a motor with the same pitch as the horizontal groove, and an arm supporting the shaft is attached to the base. is mounted so as to be slidable in a direction perpendicular to the shaft, and a pedestal to which the base and the jig are attached is mounted so as to be slidable in the extrusion direction of the extrusion member by a motor controlled by the sensor, Furthermore, a container filled with hot water at approximately 70°C to 90°C is placed below the tip of the conveyance chain connected to the above jig in order to drop and precipitate the parts cut to a certain length. A manufacturing device for extrusion-molded cement-based products, which is characterized by: