JPS58155912A - Extrusion molding device for board material made of cement into which reinforcing material is inserted - 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 The present invention relates to an extrusion molding apparatus for cement plate material with reinforcement inserted therein.

When extrusion molding a cement board, it is known to embed a reinforcing material such as a wire mesh into the board during extrusion to improve the bending strength of the board.

As an extrusion molding device for cement plate materials with reinforcing material inserted, the rear end of the resistance chamber with a plate forming die attached to the tip is divided into a Y shape, and a screw cylinder is connected to each branch. It is known that a reinforcing material passage core is provided that reaches the vicinity of the cap from the rear end of the resistance chamber. However, since this device requires two screw cylinders, the equipment cost is extremely high, and the control mechanism to ensure the operational balance of each screw cylinder is unavoidably complicated. When an imbalance occurs, product defects are inevitable due to insufficient material discharge volume, insufficient pressure force (pressure force between cement and reinforcing material), etc.

However, in the crosshead type extrusion molding equipment used for plastic extrusion molding, the reinforcing material can be inserted into the molded product by inserting a nipple for passing the reinforcing material into the crosshead, but the crosshead method So,
Because the screw cylinder crosses the molding head at right angles, there is a noticeable drop in discharge force when extruding cement, and forces such as material accumulation at the cross point are unavoidable. Difficult to apply.

Extrusion molding U-type M of reinforcing material inserted cement plate material according to the present invention
This is a structure that allows the use of a single screw cylinder to form high-quality reinforcing material-inserted cement plates.At the tip of the screw cylinder, there is a resistance chamber with a circular cross section at the rear end and a rectangular cross section toward the tip. In a cement plate material extrusion molding device in which a die for forming plate material is attached to the tip of the resistance chamber, a reinforcing material passage core is provided in the resistance chamber, and the reinforcing material insertion opening of the core is connected to the resistance chamber. Derived from the aspect of
The reinforcing material outlet of the core is disposed near the base, and a reinforcing material passing direction changing roll is provided at a bend in the passage inside the core.

The present invention will be explained below with reference to the drawings.

Fig. 1A is a partially cutaway top view showing the device of the present invention, Fig. 1B
FIG. 1C is a side view and a front view of the same device.

In FIGS. 1A to 1C, 1 is a screw cylinder, and 2 is a screw. 3 is a resistance chamber connected to the tip of the screw cylinder 1. The cross section of the rear end of this resistance chamber 3 is circular, which is the same as that of the screw cylinder, and the cross section of the tip is rectangular.
The cross section gradually changes from circular to rectangular from the rear end to the tip. Reference numeral 4 denotes a die for forming a plate material attached to the tip of the resistance chamber 3. 5 indicates a reinforcing material passage core;
As shown in the figure, it is a flat body and has a reinforcing material insertion port 51 and a reinforcing material outlet 52, and the reinforcing material insertion direction X and the reinforcing material removal direction Y cross each other. The core 5 is housed in the resistance chamber 3, the reinforcing material insertion port 51 is led out from the side of the resistance chamber 3, and the reinforcing material outlet 52 faces the cap 4. Reference numeral 6 denotes a reinforcing material passage direction changing roll provided at a bend in the passage inside the core 5.

In order to form a reinforcing material-inserted cement board using the apparatus of the present invention, the water-mixed cement composition is discharged into the resistance chamber 3 by the screw 2, and the reinforcing material A (for example, a net-shaped material, sheet-like material, or multiple parallel wire rods). In this case, since the core 5 is a flat and thin body and the rear end portion 53 is streamlined as shown in FIG. Sufficient extrusion force can be transmitted to 4 locations. Further, the reinforcing material outlet 52 of the core 5 has an outer surface tapered 520 as shown in FIG. 2, and the cement raw material can be brought into close contact with the reinforcing material from the outlet.

In the present invention, the reinforcing material A can be inserted in two layers as shown in FIG. 3A and FIG. 3B, and in this case, the reinforcing material exit of the core needs to be two vertically parallel stripes. . or,
The molded shape of the plate material can also be a hollow irregular cross section, in which case a core metal 40.
It is necessary to intervene. Furthermore, the reinforcing material A is the third
It is also possible to insert the plate material with a corrugated cross section as shown in FIGS.

The reinforcing material insertion cement board extrusion molding apparatus according to the present invention has the above-described configuration, and is capable of supplying the reinforcing material from the side of the resistance chamber and embedding the reinforcing material into the cement board during molding. . Therefore, only one screw cylinder is required, which is advantageous in terms of equipment costs, and the extruder is easy to operate and control.

[Brief explanation of the drawing]

FIG. 1A is a partially cutaway top explanatory view showing an extrusion molding apparatus according to the present invention, FIGS. 1B and 1C are side and front explanatory views respectively showing the apparatus of the present invention, and FIG. FIG. 3A and FIG. 3B are perspective explanatory views showing the core used in the present invention. FIGS. 3O and 3 are explanatory front views showing the base of the device of the present invention, respectively. In the figure, 1 is a screw cylinder, 3 is a resistance chamber,
4 is a base, 5 is a core, 51 is a reinforcing material insertion port, 52 is a reinforcing material outlet, and 6 is a reinforcing material passing direction changing roll. lzliJko. 73ΣD

Claims (1)

[Claims] (1) A cement plate extrusion molding device in which a resistance chamber with a circular cross section at the rear end and a rectangular cross section toward the tip is connected to the tip of a screw cylinder, and a plate rate and door cap are attached to the tip of the resistance chamber. A reinforcing material passage core is provided in the resistance chamber, a reinforcing material insertion opening of the core is led out from the side of the resistance chamber, and a reinforcing material outlet of the core is arranged near the cap. An extrusion molding device for reinforcing material-inserted cement plate material, characterized in that a reinforcing material passing direction changing roll is provided at a curved portion of the inner passage.