JPH052905U - Panel manufacturing equipment - Google Patents

Abstract

(57) [Summary] [Purpose] When extruding a raw material mainly composed of cement or the like into a panel by an extrusion molding method, the pressure distribution generated at the front end of the die is made uniform to prevent cracking or deformation of the panel. [Constitution] Although the panel material filled in the container receives a large wall sliding resistance when passing through the reduced diameter part of the die and pressure distribution is generated in the panel material, the pressure distribution is canceled near the enlarged part of the die. Therefore, the panel extruded from the die hole does not crack or deform.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to, for example, a manufacturing apparatus for floor materials, wall board materials, ceiling board materials, and composite panels used for OA floors, corridors, and the like, and in particular, an extrusion molding method for the panel materials and the like that imparts crack resistance improving performance. The present invention relates to a device suitable for manufacturing by.

[0002]

[Prior Art]

 Generally, in a room where office automation equipment is installed, a floor may be formed at a certain height from the floor slab due to the wiring of equipment connection wiring. Such floors are installed by combining rectangular panels and attaching legs to them so that they have a constant height. Such a floor panel is usually made of an inorganic material, and as shown in JP-A-1-263357, for example, a concrete material is used, which is fixed by a panel formwork of a prescribed size. It was common to shape it. However, since it cannot be mass-produced by the mold forming method, a continuous molding method by the extrusion molding method has been proposed. For example, as disclosed in Japanese Patent Laid-Open No. 63-246207, a raw material containing cement or the like as a main material is supplied to an extruder to continuously form a predetermined panel.

[0003]

[Problems to be solved by the device]

 However, in the past, when an attempt was made to extrude a raw material mainly composed of cement, etc. by an extrusion molding method, a pressure distribution was generated due to the wall sliding resistance between the die inner wall surface and the material billet, and the panel was formed as it was. As a result, the panel itself is cracked or deformed, making it impossible to consistently manufacture panel products of the specified dimensions. Further, the wall sliding resistance at the front end of the die is small at the center and becomes large at both sides. When the wall sliding resistance becomes large, the pressure distribution on the material billet also becomes large. When trying to match the pressure distribution generated at the front end with the low pressure near the center, the shape of the die became complicated and its processing was not easy.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, a die attached to a container of an extruder and having a die hole corresponding to a cross section of a panel to be formed, and a panel forming material loaded in the container are provided. A pressure reducing stem, a reduced diameter portion having a reduced inner diameter of the die is provided behind the die adjacent to the container, and an enlarged diameter portion is provided between the die hole and the reduced diameter portion. did.

[0005]

[Action]

 The die attached to the container of the extruder is provided with a die hole corresponding to the cross section of the panel to be molded. This is a square cone-shaped cross sectional passage that gradually narrows the cross sectional passage, and the extruded molded product is equivalent to the panel. Make a thin rectangular cross section. The container is filled with panel material, which is mainly made of inorganic material such as cement, which is made into a material billet through a mixer or kneader installed outside the extruder. Alternatively, the kneader may be used to directly fill and supply the inside of the container. Therefore, by pressing the stem with the panel material filled in the container, a continuous panel with a constant cross section is extruded from the die. At this time, when the panel material filled in the container is subjected to a large wall sliding resistance when passing through the reduced diameter portion of the die, a pressure distribution is generated in the panel material, but the pressure distribution is released near the expanded portion of the die. As a result, the panel extruded from the die hole did not crack or deform.

[0006]

【Example】

 Hereinafter, a specific embodiment of the panel manufacturing apparatus according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional view of an essential part of an extrusion molding machine constituting a panel manufacturing apparatus according to an embodiment, and FIG. 2 shows a panel material manufacturing process for supplying a panel molding material to the extrusion molding machine. ing. First, a panel formed by the panel manufacturing apparatus according to the embodiment is made of a hydraulic inorganic material such as cement as a material, and a material billet that can be supplied to an extruder is manufactured in advance. As shown in FIG. 2, for example, Portland cement, sulfonated melamine resin, polyvinyl alcohol fiber, water, etc. are used as raw materials, and these are first agitated and mixed by a mixing machine 10 at an appropriate ratio. After the mixed state becomes homogeneous, the mixture is supplied to the kneading machine 12, where it is kneaded and adjusted so that the kneaded material becomes uniform. As the kneading machine 12, in addition to the vertical type equipment as shown, an appropriate kneading machine such as a screw type can be used. The material kneaded by the kneading machine 12 is supplied to the compression molding machine 14, and is formed into a material billet 16 that can be filled in a container of an extrusion molding machine described later.

In the embodiment, since the hydraulic inorganic material is used as the raw material of the material billet 16, the material billet 16 is manufactured in advance by the above-mentioned process. Alternatively, it may be directly connected to and directly supplied and supplied. In addition to the above-mentioned hydraulic material as the panel material, a resin material or the like can be used, and in such a case, it is desirable to directly fill the container with a resin supply means.

The material billet 16 thus obtained is supplied to the panel manufacturing apparatus configured by the extrusion molding machine shown in FIG. As shown in the figure, the apparatus comprises a container 20 having a loading hole 18 in which a material billet 16 made of a hydraulic inorganic material such as cement as described above is loaded. A die 22 is attached to the front end surface of the container 20, and the die 22 is sandwiched between the die 20 and the end platen 26 so that the die hole 24 is arranged concentrically with the billet loading hole 18 of the container 20. Has been done. The die hole 24 of the die 22 has a cross-section that matches the cross-sectional shape of the panel where the outlet hole is to be formed, and is formed in a rectangular cone shape so that the cross-section expands toward the billet loading hole 18 of the container 20. Then, the material billet 16 is extruded toward the die 22 so that the cross section of the panel is smoothly formed.

A cross head 28, which is pressurized and driven by a ram cylinder, is disposed behind the container 20, and a stem 30 protruding toward the billet loading hole 18 of the container 20 is integrally formed therewith. Is attached to. A push plate 32 is provided at the tip of the stem 30 and is fitted into the billet loading hole 18 in a close contact state to press the rear end face of the material billet 16 during extrusion molding.

FIG. 3 is an enlarged cross-sectional view of a main part of the die according to this embodiment. The die 22 is composed of a reduced diameter portion 40, an enlarged diameter portion 41, and a die hole 24, and has a side cross section having a weight shape along the flow direction of the material billet 16.

Conventionally, when the rear end surface of the material billet 16 formed of a hydraulic inorganic material such as cement using an extruder is pressed during extrusion molding, the material billet 16 passes through a die hole 24 having a flat cross section. Extruded as a panel 50. At this time, the wall sliding resistance between the material billet 16 and the inner wall 51 of the die front end at the front end 52 of the die becomes large near both sides of the die hole 24 and becomes small near the center. When the wall sliding resistance is large, the pressure distribution applied to the material billet 16 also becomes large, and if the panel 50 is produced with the pressure distribution accumulated in the material billet 16, both ends of the panel 50 are cracked and it is not a product. .. Therefore, in order to release the pressure distribution generated in the material billet 16, the side cross-sectional shape of the die 22 is made into a weight shape, and when the material billet 16 passes through the reduced diameter portion 40, a high pressure distribution is obtained. In order to prevent this from occurring inside, the expanded diameter portion 41 is provided in the die 22 to cancel the pressure distribution generated in the material billet 16.

The material billet 16 whose diameter has been once expanded and whose pressure has been released is taken out from the die hole 24 as a panel 50 of the product.

The operation of the panel manufacturing apparatus thus configured will be described. First, the molding material of the panel is mixed and kneaded, and the material billet 16 is molded by the molding device so that it can be loaded into the extruder. The material billet 16 is transferred to the front surface of the container 20 by the billet supply device attached to the extruder and the preparation is completed. In the extrusion molding machine, the stem 30 is moved forward, the material billet 16 is fed into the loading hole 18, and the mandrel 34 which has been in the retracted state is projected from the pressing plate 32 to face the die 22. After that, a molding operation is started, in which the stem 30 is extruded by driving the crosshead 28 by a ram cylinder, and the material billet 16 is pressed toward the die 22 by the pressing plate 32 at the tip.

As a result, a high internal pressure is not generated in the vicinity of both end surfaces of the panel 50, both side portions of the molded panel 50 are not cracked, and dimensional accuracy is good, and it is possible to perform panel molding without distortion. ..

By this pressurizing operation, the material billet 16 in the container 20 is formed into a shape set by the die hole 24, is formed into a rectangular flat panel 50, and is discharged. As the material billet 16, one that can be plastically deformed at room temperature is used. For example, a hydraulic inorganic material made of cement, calcium silicate, gypsum, etc., aggregate such as river sand, amino resin such as urea resin, chloride It is also possible to use a mixture of a curing agent such as ammonium in an appropriate ratio.

In the above embodiment, the material billet 16 is formed by the billet forming device so that it can be loaded into the container 20. However, the kneading machine 12 directly feeds the material into the loading hole 18 of the container 20 for filling. You can With such a configuration, continuous panel molding is possible, which has the advantage of facilitating the procedure.

[0017]

[Effect of the device]

 As is clear from the above description, in the present invention, the die mounted on the container of the extruder and having the die hole corresponding to the cross section of the panel to be molded is loaded into the container. A stem for pressing the panel molding material is provided, and a reduced diameter portion having a reduced diameter inside the die is provided behind the die adjacent to the container, and an enlarged diameter portion is provided between the die hole and the reduced diameter portion. With this structure, it is possible to mold the panel without cracking, with high dimensional accuracy and without distortion.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a panel manufacturing apparatus according to an embodiment.

FIG. 2 is an explanatory diagram of a forming process of a material billet.

FIG. 3 is an enlarged cross-sectional view of a main part of a die according to an embodiment.

[Explanation of Codes] 16 Material Billet 18 Billet Loading Hole 20 Container 22 Die 24 Die Hole 26 End Platen 28 Crosshead 30 Stem 32 Pusher 40 Reduced Diameter 41 Expanded Diameter 50 Panel 51 Die Front End Inner Wall 52 Dice Front End

Claims (1)

[Claims for utility model registration] [Claim 1] A die attached to a container of an extrusion molding machine and having a die hole corresponding to a cross section of a panel to be molded, and a panel molding material loaded into the container are added. A stem for pressing, a reduced diameter portion having a reduced inner diameter of the die is provided behind the die adjacent to the container, and an enlarged diameter portion is provided between the die hole and the reduced diameter portion. Panel manufacturing equipment characterized by.