JPH0258087B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a molding machine for fiber-reinforced hydraulic material hollow plates, and more specifically, the present invention relates to a molding machine for forming fiber-reinforced hydraulic material hollow plates, and more specifically, the present invention relates to a molding machine for forming hollow plates of fiber-reinforced hydraulic material. This invention relates to a molding machine that can perform the following steps.

[Conventional technology]

Hydraulic substances such as cement, mixtures of silicic and calcareous raw materials, semi-hydrated or molded anhydrite,
Molded bodies reinforced with reinforcing fibers such as asbestos, pulp, and organic synthetic fibers and formed into a shape having hollow holes extending through them in the length direction are used as interior and exterior materials.

This molded body is made by kneading hydraulic substances, reinforcing fibers, water, and if necessary thickeners, pigments, etc. to form a base, extruding this base using a screw type, piston type, etc. The cross section is made almost similar to the outer periphery of the cross section of the product, and after passing through a die with a core inside, it is cut to a specified length, and the cut uncured molded product is cured naturally, with steam, or in an autoclave. It is made into a product.

[Problem that the invention seeks to solve]

However, in the conventional technology, the base material is not necessarily kneaded completely, which may cause non-uniform extrusion moldability, and when the base material is extruded using a screw extruder, Due to the residual strain inside the substrate due to the rotation of the screw, the uncured molded body extruded from the die meanders in the width direction of the product, impeding the linearity of the product in the longitudinal direction.

In order to obtain linearity in the longitudinal direction of the product, a method is used in which both sides of the uncured molded product being extruded from the die are held between side plates, and the uncured molded product is moved forward while sliding on the side plates to straighten the product. However, this sliding causes deformation on both sides of the uncured molded body, and even when the advancement of the uncured molded body is temporarily stopped and both sides are pressed with side plates to correct the deformation, the uncured molded body is deformed. There was a problem in that both sides of the cured molded product were deformed due to pressure.

In addition, in order to create a pattern on the surface of the product, there is a method of making uneven notches on the inner surface of the upper side of the nozzle and extruding it. There was a problem that the pattern had to be monotonous with only strips.

In order to create a discontinuous pattern in the longitudinal direction of the product, a roll engraved with unevenness that is opposite to the unevenness of the pattern is pressed and rotated on the top surface of the uncured molded product that has just been extruded from the die, or There is also a method of introducing a flexible belt with unevenness into the die, or pressing and rotating it on the top surface of the uncured molded product immediately after being extruded from the die, but both methods have the problem of complicating the equipment. It was hot.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes: an extruder 1 that extrudes a substrate; a spreader 2 that is connected to the extruder and makes the cross-sectional outer circumferential shape of the substrate approximate to the cross-sectional outer circumferential shape of the product.
and; a preforming frame 3 connected to the spreader and preforming the cross-sectional outer circumferential shape of the base material into the cross-sectional outer circumferential shape of the product; and a core 4 for forming the hollow part of the uncured molded body.
a base 5 having; a steel conveyor 6 for conveying the uncured molded product;
and; disposed with a gap 7 in the extrusion direction of the side portion of the preform frame, abuts the upper surface of the steel conveyor so as to be able to slide in a direction perpendicular to the extrusion direction, and molds both sides of the uncured molded body. side formworks 8a, 8b; and an upper formwork disposed with a gap in the extrusion direction above the preforming formwork, and abutting on the upper surface of the side formworks to form the upper surface of the uncured molded product. 9, which is provided at the end of the upper mold in the extrusion direction and abuts against the end of the side mold in the extrusion direction and the upper surface of the steel conveyor to form the end of the uncured molded body in the extrusion direction, and has a degassing hole. an end member 11 having a diameter of 10, and an upper member 12 that is movable up and down;
Upper cutter 13 for cutting the substrate and the uncured molded body
and; provided so as to be able to enter and leave the gap from the side;
Side cutter 14 for cutting the substrate and the uncured molded body
a, 14b; a pedestal having a support plate 15 that slides and supports the steel conveyor from below, and a blocking plate 16 that abuts an end of the upper member in the extrusion direction and prevents movement of the upper member in the extrusion direction; 17; a space 18 into which the steel conveyor enters between the extrusion direction end of the bottom of the preform frame and the extruder direction end of the support plate; and a space 18 for sliding the side forms 8a and 8b. The present invention provides a molding machine characterized by having: side formwork drive devices 21a, 21b; and an upper member drive device 22 that moves the upper member 12 up and down.

[Effect] The present invention will be explained with reference to figures showing examples.

This example is a molding machine using a screw type extruder as an extruder.

FIG. 1 is a longitudinal cross-sectional schematic diagram of an embodiment of the present invention, and FIG.
The figure is a schematic diagram taken along the line A-A in Figure 1, Figure 3 is a schematic view taken along line B-B in Figure 1, Figure 4 is an explanatory diagram showing the operation of the cutter, and Figure 5 is another example. FIG. 2 is a schematic diagram showing the surroundings of a space.

For hydraulic substances such as cement, mixtures of silicic and calcareous raw materials, semi-hydrated or molded anhydrous gypsum,
The base material is made by adding reinforcing fibers such as asbestos, pulp, and organic synthetic fibers, thickeners such as methyl cellulose and polyvinyl alcohol, and pigments such as titanium yellow and red iron, and adding water and kneading them. It is extruded into a cylindrical shape by an extruder 1.

The extruded cylindrical material is passed through a spreader 2 whose cross-sectional outer circumferential shape approximates the cross-sectional outer circumferential shape of the product, and then a preforming frame is used to preform the cross-sectional outer circumferential shape of the material into the cross-sectional outer circumferential shape of the product. 3 and a core 4 for forming the hollow part of the uncured molded body.

The side forms 8a and 8b are in contact with the upper surface of the steel conveyor 6 that conveys the uncured molded product 19 through a gap 7 in the extrusion direction of the side part of the preform 3, and are arranged on the side in a direction perpendicular to the extrusion direction. Part formwork drive device 21a,
21b, and is fixed at a position where both sides of the uncured molded body 19 can be molded.

The upper member 12, which is movable up and down by the upper member drive device 22, has a gap 7 in the extrusion direction of the upper part of the preform 3, and the upper mold 9 and the end member 11 are connected to the side molds 8a and 8b, respectively. At the same time, the end member 11 abuts on the steel conveyor 6 and is fixed.

The preformed substrate is conveyed on a steel conveyor 6,
The material is extruded into the space surrounded by the side forms 8a, 8b and the upper member 12 to fill this space, and when the space is completely filled with the material and the uncured molded body 19 is formed, the extruder 1 is turned off. Stop driving.

Upper cutter 13 and side cutters 14a, 14
b enters the gap 7 from the top and the sides, cuts the base material and the uncured molded body 19, and then leaves and returns to the original position.

The upper member 12 is pulled upward and the side formwork 8
a and 8b slide laterally on the steel conveyor 6, each leaving the uncured molded body 19 and returning to its original position.

The steel conveyor 6 is operated in the direction of the arrow, and the uncured molded body 19 is also separated from the core 4 and conveyed.

After the uncured molded body 19 has been conveyed, the side forms 8a, 8b and the upper member 12 are again fixed at predetermined positions, the base material is extruded from the die 5, and the above operation is repeated.

Sliding/fixing/upper member 1 of side formwork 8a, 8b
The vertical movement and fixation of the cutter 2 and the entry and removal of the upper cutter 13 and the side cutters 14a and 14b are performed by an appropriate drive device such as a cylinder/piston or pinion rack.

For convenience in handling the uncured molded body 19, the template 20 is placed on a steel conveyor 6 as shown in FIG.
The substrate is placed between the side forms 8a and 8b which have already been fixed from the space part 18, and the base material is placed in the space surrounded by the form plate 20, the side forms 8a and 8b, and the upper member 12. Can be filled and molded. The template 20 is conveyed by the steel conveyor 6 while carrying the uncured molded body 19.

The shape and size of each part of the molding machine of the present invention are as follows:
This is determined by the shape and size of the product, and by engraving the lower surface of the upper formwork 9, it is possible to create a pattern on the upper surface of the uncured molded body 19 with the unevenness opposite to that of the engraving.

〔Effect of the invention〕

By using the molding machine of the present invention, a strong base material with sufficient shape retention can be molded by extrusion filling, so that the sides of the uncured molded product can be molded into an accurate shape, and the top surface With a simple device, it is possible to create not only a continuous pattern of grooves and protrusions in the longitudinal direction, but also a free discontinuous pattern.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional schematic diagram of an embodiment of the present invention, and FIG.
The figure is a schematic diagram taken along the line A-A in Figure 1, Figure 3 is a schematic view taken along the line B-B in Figure 1, Figure 4 is an explanatory diagram showing the operation of the cutter, and Figure 5 is another example. FIG. 2 is a schematic diagram showing the surroundings of a space. 1... Extruder, 2... Spreader, 3... Preform frame, 4... Core, 5... Mouthpiece, 6... Steel conveyor, 7... Gap, 8a, 8b... Side formwork, 9... Upper formwork, 10... Deaeration hole, 11...
End member, 12... Upper member, 13... Upper cutter, 14a, 14b... Side cutter, 15... Support plate, 16... Blocking plate, 17... Frame, 18...
Space portion, 19... uncured molded body, 20... template,
21a, 21b... Side formwork drive device, 22...
Upper member drive device.

Claims (1)

[Scope of Claims] 1. An extruder 1 that extrudes a substrate; and a spreader 2 that is connected to the extruder and makes the cross-sectional outer circumferential shape of the substrate approximate to the cross-sectional outer circumferential shape of the product.
and; a preforming frame 3 connected to the spreader and preforming the cross-sectional outer circumferential shape of the base material into the cross-sectional outer circumferential shape of the product; and a core 4 for forming the hollow part of the uncured molded body.
a base 5 having; a steel conveyor 6 for conveying the uncured molded product;
and; disposed with a gap 7 in the extrusion direction of the side of the preform frame, abuts the upper surface of the steel conveyor so as to be able to slide in a direction perpendicular to the extrusion direction, and holds both sides of the uncured molded product. Side forms 8a and 8b to be formed; and an upper part disposed in the extrusion direction of the upper part of the preforming form with a gap in between, and in contact with the upper surface of the side formwork to form the upper surface of the uncured molded product. A formwork 9, which is provided at the extrusion direction end of the upper formwork and comes into contact with the extrusion direction end of the side formwork and the upper surface of the steel conveyor to form the extrusion direction end of the uncured molded body, and an end member 11 having a deaeration hole 10, and an upper member 12 which is movable up and down;
Upper cutter 13 for cutting the substrate and the uncured molded body
Between the two, it is provided so that it can be entered and removed from the side,
Side cutter 14 for cutting the substrate and the uncured molded body
a, 14b; a pedestal having a support plate 15 that slides and supports the steel conveyor from below, and a blocking plate 16 that abuts an end of the upper member in the extrusion direction and prevents movement of the upper member in the extrusion direction; 17; a space 18 into which the steel conveyor enters between the extrusion direction end of the bottom of the preform frame and the extruder direction end of the support plate; and a space 18 for sliding the side forms 8a and 8b. A molding machine comprising: side formwork drive devices 21a, 21b; and an upper member drive device 22 that moves the upper member 12 up and down.