JPH01196309A - Manufacture and device for hydraulic substance hollow molding with built-in reinforcing material - Google Patents

Abstract

PURPOSE:To prevent a reinforcing material from deviating its built-in position, securing covering thickness and making no limit of inserted position by feeding the same onto a reinforcing material supporting tool provided in a core in the downstream of extrusion direction without passing through a cap. CONSTITUTION:A reinforcing material 21 is fed onto a reinforcing material supporting tool 19a provided in a core 4 by using a frame consisting of a steel conveyor 6 as a lower frame disposed in the extrusion direction of a cap 5 having a core 4 provided next to an extruder 1, an upper frame 9 and side frames 8a and 8b openable. A hydraulic base is cast from the extruder 1 into the frame, molded and integrated with a reinforcing material 21. Said uncured molding is cut off the unformed base and separated from the upper frame 9 and the side frames 8a and 8b by driving the steel conveyor 6, and then cured. The inserted position of the reinforcing material 21 is not deviated and sufficient covering thickness can be secured by said arrangement, and a hydraulic substance hollow molding with the built-in reinforcing material 21 to be able to encircle completely the hollow section is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a method and apparatus for producing a hydraulic material hollow molded body incorporating a reinforcing material.

[Prior Art] Hydraulic substances such as cement, mixtures of silicic raw materials and calcareous raw materials, hemihydrous or type II anhydrite are mixed with asbestos, pulp,
Molded bodies reinforced with reinforcing fibers such as 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, and extruding this base using a screw type, piston type, etc. extruder. The cross section is approximately approximate to the outer circumference of the product, and after passing through a die with a core inside, it is cut to a predetermined length, and the cut uncured molded product is cured naturally, in steam, or in an autoclave. It is cured and made into a product.

Further, in order to increase the strength of the above-mentioned molded body, particularly the bending and impact strength, hollow molded bodies of hydraulic materials are also manufactured which incorporate reinforcing materials such as wire mesh and reinforcing bars.

A conventional manufacturing method for the above-mentioned molded product is a method in which two extrusion molding machines are connected in a Y-shape, and a reinforcing material is inserted along a guide from the extruder side of this connection (for example,
92808), and a modification of the above method using only one extrusion molding machine (for example, JP-A-59-112068) is known.

[Problems to be Solved by the Invention] However, in the conventional method, the insertion position of the reinforcing material was shifted due to the pressure of the base material, and a sufficient covering thickness could not be ensured.

In addition, the reinforcing material passes through a cap with a core, and the core is attached to the cap in the vertical or horizontal direction using metal fittings. Therefore, the inserting position of the reinforcing material is restricted, and in particular, it has been impossible to insert the reinforcing material completely surrounding the hollow part of the molded body.

The present invention has a built-in reinforcing material that does not shift the insertion position of the reinforcing material (ensures a sufficient covering thickness, is not limited to the insertion position of the reinforcing material, and can completely surround a hollow part). The object of the present invention is to provide a method for producing a hollow molded body of a hydraulic material and an apparatus therefor.

[Means for Solving the Problems 1] In order to achieve the above object, the method of the present invention uses a steel conveyor connected to an extruder and disposed in the extrusion direction of a die having a core as a lower frame, and an upper frame as a lower frame. Using a formwork with openable side frames, the upper frame and side frames are opened, the reinforcing material is mounted on the reinforcing material support provided in the core, and the formwork is placed at the position where the formwork will be assembled. The upper frame and side frames are closed to assemble the formwork, and the assembled formwork is filled with a hydraulic base material to form the base material and integrate it with the reinforcing material.
The uncured molded body was cut from the uncured base material, the upper frame and the side frames were opened and separated from the uncured molded body, and the steel conveyor was rotated to separate the uncured molded body from the upper frame and the side frame. Later, in the method of curing the uncured molded body, the apparatus of the present invention includes an extruder that extrudes the hydraulic base material, and a sprayer that is connected to the extruder and that approximates the cross-sectional outer circumference shape of the base material to the cross-sectional outer circumference shape of the product. : A mouthpiece connected to a spretzer and having a preforming frame for preforming the cross-sectional outer circumferential shape of the substrate into the cross-sectional outer circumferential shape of the product, and a core for forming the hollow part of the uncured molded object; Conveying steel conveyor: Disposed with a gap in the extrusion direction on the side of the preform frame, and abuts on the top surface of the steel conveyor so as to be able to slide in a direction perpendicular to the extrusion direction, and conveys both sides of the uncured molded product. A side formwork for forming and two preforming forms; From the extrusion direction end of the side formwork provided at the extrusion direction end of the frame and the end formwork which contacts the upper surface of the steel conveyor, forms the extrusion direction end of the uncured molded product, and has a deaeration hole. An upper member that can move up and down: A reinforcing material holder that is installed on the core and mounts a reinforcing material in a space surrounded by the steel conveyor, the survey part formwork, and the upper member: It is set up so that it can be removed,
An upper cutter that cuts the base material and the uncured molded product: A side cutter that is installed so that it can enter and leave the gap from the side, and that cuts the base material and the uncured molded product, and a steel conveyor that is slidably supported from below. and a blocking plate that abuts against the end of the upper member in the extrusion direction and prevents the upper member from moving in the extrusion direction: the end of the bottom of the preform frame in the extrusion direction and the support plate in the direction of the extruder. A device having a space between the end portion and a space into which a steel conveyor enters, the reinforcing material support is an inner frame that surrounds the core and is slidably fitted to the core, and A device in which the end formwork has an opening through which the inner formwork can be discharged;
Or, the reinforcing material support is a movable protrusion that protrudes from the upper surface of the core, fits into the core due to the pressing force of the hydraulic base, and can be restored when the pressing force of the hydraulic base is removed. Can be done.

[Function] The reinforcing material does not pass through the die, but is mounted on a reinforcing material support provided on the core downstream of the base die in the extrusion direction, and is press-fitted into a formwork that surrounds the reinforcing material and is assembled to be openable. Since the reinforcing material is integrally molded with the base material, the insertion position of the reinforcing material will not shift (
A sufficient covering thickness can be ensured, and the insertion position is not limited, and in particular, the hollow part can be completely surrounded and built-in.

[Example] The present invention will be explained with reference to drawings showing embodiments.

Fig. 1 is a schematic vertical cross-sectional view of an example in which a screw extruder is used as the extruder and an inner frame is used as the reinforcing material support; Fig. 2 is a schematic view taken along arrow A-A in Fig. 1; The figure is B in Figure 1.
4 is an explanatory diagram showing the discharge status of the inner frame in the apparatus shown in FIG. 1, and FIG. 5 is an explanatory diagram showing the operation of the cutter. Side formwork 8a, 8b
The end formwork 11 serves as a side frame, and the steel conveyor 6 serves as a lower frame to form a formwork.

Next, a manufacturing method using the above device will be explained.

The upper member 12 is pulled upward, the side formworks 8a and 8b are slid laterally on the steel conveyor 6 to open the formwork, and a reinforcing material (wire mesh) 21 is attached to the outer periphery of the inner frame 19a. After slidingly fitting into the core 4, the surveying part formwork 8a,
8b is slid in a direction perpendicular to the extrusion direction by coming into contact with the upper surface of the steel conveyor 6 that conveys the uncured molded product 23 through a gap 7 in the extrusion direction on the side of the preforming frame 3, and the uncured molded product is It is fixed at a position where both sides of the body 23 can be molded.

The upper member 12, which is vertically movable, connects the upper formwork 9 and the end formwork 11 with a gap 7 in the extrusion direction of the upper part of the preform 3.
are in contact with the upper surfaces and ends in the extrusion direction of the side forms 8a, 8b, respectively, and the end form 11 is in contact with and fixed on the steel conveyor 6, and the forms are assembled and closed.

Hydraulic substances such as cement, mixtures of silicic and calcareous raw materials, semi-hydrous or type II anhydrite, asbestos, valves, etc.
Reinforcing fibers such as organic synthetic fibers, binders such as methyl cellulose and polyvinyl alcohol, pigments such as titanium yellow and red iron are added, and water is added to the base material, which is then kneaded into a cylindrical shape using a screw extruder. It is extruded into a shape.

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 3 for preforming the cross-sectional outer circumferential shape of the material into the cross-sectional outer circumferential shape of the product. The uncured molded body 23 is preformed using a die 5 having a core 4 for molding the hollow portion of the uncured molded body 23 .

The preformed base material is pushed out into a space surrounded by the steel conveyor 6, the side forms 8a, 8bj5, and the upper member 12, and fills this space while discharging the inner frame 19a from the formwork through the opening 20, When this space is completely filled with the base material and the uncured molded body 23 is molded, the operation of the extruder 1 is stopped.

Upper cutter 13 and side cutter 14a.

14b enters the gap 7 from the top and side, respectively,
After cutting the substrate and the uncured molded body 23, it is separated and returned to its original position.

The upper member 12 is pulled upward, and the side forms 8a and 8b slide laterally on the steel conveyor 6, leaving the uncured molded body 23 and returning to their original positions.

The steel conveyor 6 is operated in the direction of the arrow, and the uncured molded body 23 is also separated from the core 4 and conveyed.

After the uncured molded body 23 is transported, the reinforcing material 21 is attached to the outer periphery of the inner frame 19 again, and the inner frame 19 is slidably fitted to the core 4,
The side forms 8a, 8b and the upper member 12 are fixed in place, the base material is extruded from the die 5, and the above operation is repeated.

Sliding and fixing of the surveying part forms 8a and 8b, vertical movement and fixing of the upper member 12, and the upper cutter 13i5 and the side cutter 1
4a and 14b are moved in and out by an appropriate drive device such as a cylinder/piston, pinion/rack, etc.

As the reinforcing material 21, a reinforcing bar having a shape other than a wire mesh may be used, and it can be placed at any position between the core 4 and the outer periphery of the uncured molded body 23.

The uncured molded body 23 is cured by natural, steam, or autoclave curing.

FIG. 6 is a perspective explanatory view of a movable protrusion used as a reinforcing member support in another embodiment of the present invention.

A plurality of movable protrusions 19b are provided on the upper surface of each core 4, and reinforcing members (reinforcing bars in the figure) 21 are mounted at predetermined positions within the formwork.

When the base material is filled up to the position of the movable protrusion 19b that frames the reinforcing material 21, the movable protrusion 19 fits into the core 4 due to the pressing force of the base material, and does not become an obstacle to the filling of the base material.
The reinforcing material 21 is made of movable protrusion 19b by the filled base material.
It is maintained without shifting from the position where it was mounted.

By using the movable protrusion 19b, compared to the case where the inner frame 19a is used, when a plurality of cores are used, a reinforcing material can be built into the base material between the cores.

The manufacturing procedure when using the movable protrusion 19b is as follows:
This is the same as in the case where the inner frame 19a is slidably inserted and ejected.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the effects described below.

Since the reinforcing material does not pass through the die and is supplied by being mounted on the reinforcing material support provided in the core downstream in the extrusion direction, the built-in position of the reinforcing material does not shift and the covering thickness can be ensured. , there are no restrictions on the insertion position of the reinforcing material.

By making the reinforcing material support an inner frame that surrounds the core and is slidably fitted to the core, the reinforcing material can be inserted surrounding the core, and the reinforcing material support By making it a movable protrusion that protrudes from the upper surface of the core, fits into the core due to the pressing force of the base material, and returns to its original state when the pressing force of the base material is removed, when using a Pj number core, it is possible to Reinforcements can also be inserted into the substrate between the cores.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional schematic diagram showing a state in which the upper frame and side frame are assembled after the reinforcing material of the example using a screw extruder as the extruder and the inner frame as the reinforcing material support is packed. , Fig. 2 is a schematic view taken along the arrow A-A in Fig. 1, Fig. 3 is a schematic view taken along the arrow B-B in Fig. 1, and Fig. 4 shows the discharge status of the inner frame in the device shown in Fig. 1. FIG. 5 is an explanatory diagram showing the operation of the cutter, and FIG. 6 is a perspective explanatory diagram of a movable protrusion in another embodiment of the present invention. ■-Extruder 2... Spreader 3... Preform frame 4... Core 5... Cap
6... Steel conveyor 7... Gap 8
a, 8b...Side formwork 9...Upper formwork 10
- Deaeration hole 11, one end formwork 12, upper member 13, upper cutter 14a, 14b, side force vine

Claims (1)

[Scope of Claims] 1. A steel conveyor connected to an extruder and disposed in the extrusion direction of a die having a core is used as a lower frame, and a formwork with an openable upper frame and side frames is used, and the upper frame and After opening the side frame and placing the reinforcing material on the reinforcing material support provided in the core and placing it in the position where the formwork will be assembled, the upper frame and side frame are closed and the formwork is assembled. By filling the hydraulic base material into the molded formwork, the base material is formed and integrated with the reinforcing material, and the uncured molded body is cut from the unformed base material.
The upper frame and side frames are opened and separated from the uncured molded product, and the steel conveyor is rotated to remove the uncured molded product from the upper frame and side frames. After that, the reinforcing material to cure the uncured molded product is removed. A method for manufacturing a hollow molded body with built-in hydraulic material. 2 An extruder 1 for extruding a hydraulic base: A spreader 2 connected to the extruder 1 and making the cross-sectional outer circumference shape of the base approximate the cross-sectional outer circumference shape of the product: A spreader 2 connected to the spreader 2 and the cross-sectional outer circumference shape of the base material A die 5 having a preform frame 3 for preforming the product into the cross-sectional outer circumferential shape of the product and a core 4 for forming the hollow part of the uncured molded product: A steel conveyor 6 for conveying the uncured molded product: Preforming A side mold is disposed through a gap 7 in the extrusion direction on the side of the frame 3, contacts the upper surface of the steel conveyor 6 so as to be able to slide in a direction perpendicular to the extrusion direction, and forms both sides of the uncured molded body. Frame 8a, 8
b: an upper formwork 9 disposed in the extrusion direction at the upper part of the preform form 3 with a gap 7 in between, abutting on the upper surfaces of the side formworks 8a and 8b and forming the upper surface of the uncured molded body; Formwork 9
An end that is provided at the extrusion direction end of the side forms 8a, 8b and contacts the extrusion direction end of the side forms 8a, 8b and the upper surface of the steel conveyor 6, forms the extrusion direction end of the uncured molded body, and has a degassing hole 10. A reinforcing material is installed in the space provided in the core 4 and surrounded by the steel conveyor 6, the side forms 8a and 8b, and the upper member 12. A reinforcing material holder 19 is provided to be able to enter and leave the gap 7 from above, and an upper cutter 13 is provided to cut the base material and the uncured molded body. side cutters 14a and 14b that cut the substrate and the uncured molded body; a support plate 15 that slides and supports the steel conveyor 6 from below; A blocking plate 16 that prevents movement to
A steel conveyor 6 is disposed between the extrusion direction end of the bottom of the preform 3 and the extruder 1 direction end of the support plate 15.
An apparatus for producing a hollow molded body of a hydraulic material having a built-in reinforcing material and having a space portion 18 into which the material enters. 3 The reinforcing material support 19 surrounds the core 4 and supports the core 4.
The inner frame is slidably fitted to the end formwork 11.
3. The apparatus for manufacturing a hydraulic material hollow molded body incorporating a reinforcing material according to claim 2, wherein the inner frame has an opening 20 through which the inner frame can be discharged. 4. The reinforcing material support 19 is a movable protrusion that protrudes from the upper surface of the core 4, fits into the core 4 due to the pressing force of the base material, and can be restored when the pressing force of the base material is removed. Manufacturing equipment for hollow molded hydraulic material with built-in reinforcing material.