JPH0139326B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of forming an endless belt having a large number of rod-shaped protrusions on its surface, and an apparatus for forming the same. It can be used for various purposes, such as being used as a transport belt for transporting agricultural seedlings to a work destination, as a normal belt conveyor, or as a brush.

Conventional technology Conventionally, a band-shaped endless belt with a large number of rod-shaped protrusions formed on its surface has been used as a transport belt for transporting agricultural seedlings to a work area by connecting it to a combine harvester, etc., or as a normal belt conveyor. Various types of brushes, such as those used as brushes, are known. However, these conventionally known endless belts are formed by providing a large number of bar-like protrusions on the surface of a flat plate with both ends separated, and then connecting both ends of the flat plate using an appropriate connector, adhesive, etc. It was formed into a shape. This conventional method requires a lot of time and effort to connect flat plates in an endless manner, is prone to breakage at the joint, and is often undesirable depending on the purpose of use as it creates unevenness at the joint.

Also, as a method of forming an endless belt,
Invention described in Japanese Patent Publication No. 57-49022, Japanese Patent Publication No. 57-49022
The invention described in Japanese Utility Model Publication No. 23135 and the invention described in Japanese Utility Model Publication No. 1983-29580 are known, but these both have wide protrusions with a low protrusion height protruding from the surface, or flat protrusions with no protrusions. It forms a flexible belt, and does not form an endless belt with a large number of protruding bar-like protrusions. In order to mold an endless belt with a large number of protruding bar-shaped protrusions using a mold, it is time-consuming to remove the endless belt from the mold after molding, and this removal work is difficult when the outer mold is located near the top and bottom. It was a difficult thing to do.

Problems to be Solved by the Invention The present invention attempts to solve the above-mentioned problems, and it is an object of the present invention to easily form an endless belt with bar-like protrusions protruding from the surface, and to form an endless belt from a mold after forming. The purpose is to allow the belt to be easily removed without being affected by the outer shape.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes placing an upper unvulcanized rubber plate on the upper surface of a medium mold in which forming holes for forming rod-shaped projections are formed at appropriate intervals on the outer periphery. Of the outer molds divided into multiple parts, the lower unvulcanized rubber plate is placed on the inner surface of the outer mold located below the middle mold, and the unvulcanized rubber is heated and pressurized between the upper and lower outer molds and the middle mold. Then, the upper and lower unvulcanized rubber plates are press-fitted into the forming hole, and the upper and lower unvulcanized rubber plates are connected in an endless manner to form an endless belt, and then the outer mold and the middle mold are separated to form an endless belt. After the composition has stabilized, the middle mold, which is slidably attached to the outer periphery of the slide pipe, is slid along the slide pipe and moved outward from the position facing the inner periphery of the outer mold, and then the endless belt is formed. It is made so that it can be removed.

In addition, the device for realizing this method consists of a medium mold in which a large number of forming holes for forming rod-shaped protrusions are formed on the outer periphery at appropriate intervals, a slide pipe on which the medium mold is slidably mounted, and an outer periphery of the medium mold. It consists of a plurality of upper and lower outer molds that are pressed together.

Effects Since the present invention is constructed as described above, it is possible to seamlessly connect endless belts, eliminate the need to connect both ends of a flat object, and prevent breakage accidents that conventionally tend to occur from connecting parts. It never occurs. Furthermore, since there is no unevenness in the connecting portion, there are no limitations on the purpose of use. In addition, since the forming holes for forming the rod-shaped protrusions of the endless belt are formed on the outer periphery of the medium mold, the structure of the mold is easier and the unit area is smaller than when forming holes on the inner periphery of the outer mold. It is economical because the per-pressure force is large and the output of the molding device can be reduced.

After molding, after the composition of the endless belt has stabilized, the middle mold is slid along the slide pipe and moved outward from the position facing the inner periphery of the outer mold, and then the elasticity of the formed endless belt is utilized. The molding is completed by peeling it off from the middle mold. This peeling is performed after moving the middle mold to a position where it is not affected by the outer mold, making it easier to peel off the endless belt with many bar-shaped protrusions that are difficult to peel. This improves work efficiency and eliminates strain. This can prevent danger to workers and an increase in the incidence of defective products caused by peeling due to improper posture.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 indicates a medium-sized belt having a cylindrical shape with a through hole 2 provided in the center, and protruding from the surface of an endless belt 3.
An outer peripheral plate 6 provided with forming holes 5 for molding a large number of bar-shaped protrusions 4 is fixed to the outer peripheral surface, and two molds with different outer diameters are successively used to mold endless belts 3 with different diameters. It is formed by providing. 7 is a hollow slide pipe, on the outer periphery,
A dividing wall on which the medium size 1 is slidably mounted, the total length of which is at least twice that of the medium size 1, both ends are sealed with lids 8 and 9, and only one end is left open to form a flow port 11. 12, the internal hollow is divided into a steam passage 13, and an introduction hole 14 and a discharge hole 15 for high-temperature steam are formed at both ends of the steam passage 13. Reference numeral 16 denotes a fixed shaft, the upper end of which is fixed to the upper main body 17 of the device, and a fixed collar 18 is formed toward the lower end, and the slide pipe 7 is fixed to this fixed collar 18 via a bearing 20 that is slidable in the vertical direction. By connecting and fixing at right angles with screws 21, the slide pipe 7 can be freely slid in the vertical direction. Reference numeral 22 denotes an outer mold, which is divided into two parts, an upper body 23 and a lower body 24, and is fixedly formed on the upper body 17 and the lower body 25, respectively, at a position corresponding to the middle mold 1, which is located in the direction of the bearing 20. The main body 25 can be pushed upward.

In the structure as described above, an upper unvulcanized rubber plate 26 is placed on the upper surface of the middle mold 1 in which forming holes 5 for forming rod-shaped protrusions 4 are formed at appropriate intervals on the outer periphery as shown in FIGS. 1 and 3. A lower unvulcanized rubber plate 27 is placed on the inner surface of the lower body 24 of the outer mold 22 located below the middle mold among the plurality of divided outer molds. Next, high temperature steam is introduced from the introduction hole 14 of the slide pipe 7 to heat the slide pipe 7,
Raise the lower body 25 and lower the lower body 2 of the outer mold 22.
4 from below against the lower surface of the middle mold 1, push up the middle mold 1 together with the slide pipe 7, press it against the upper body 23 of the outer mold 22 located above as shown in FIG. 4, and heat and pressurize it. The unvulcanized rubber plates 26 and 27 are press-fitted into the forming hole 5, and the upper and lower unvulcanized rubber plates 26 and 27 are connected in an endless manner to form the endless belt 3. This unvulcanized rubber plate 2
6 and 27, the lower body 24 of the outer mold 22 is lowered to separate the outer mold 22 and the middle mold 1, and after the composition of the endless belt 3 has stabilized, the middle mold 1 is moved along the slide pipe 7. Then, slide the lid at one end in 8 directions,
After moving from the position facing the inner periphery of the outer mold 22 to the outside where it is not affected by the outer mold 22, the molded endless belt 3 is peeled off from the middle mold 1 using the elasticity of the molded endless belt 3, thereby completing the molding. Complete.

Effects of the Invention Since the present invention is configured as described above,
Endless belts can be connected seamlessly, there is no need to connect both ends of a flat object, there is no breakage that is likely to occur from conventional joints, and there is no unevenness at the joint. Therefore, the purpose of use is not limited. In addition, the forming holes for forming the rod-like protrusions of the endless belt are
Since it is formed on the outer periphery of the medium mold, it is easier to manufacture the mold than when it is formed on the inner periphery of the outer mold, and the receiving pressure per unit area is larger, which can reduce the output of the molding device. It is economical. In addition, by forming the molding holes on the outer periphery of the middle mold, the rod-shaped protrusions of the endless belt remain connected to the middle mold even when the outer mold and the middle mold are separated, so that they are not forcibly separated when the outer mold and the middle mold are separated. By peeling off from the middle mold after the material forming the endless belt is stabilized, it is possible to separate the endless belt from the mold without causing damage. shall be.

After molding, after the composition of the endless belt has stabilized, the middle mold is slid along the slide pipe and moved outward from the position facing the inner periphery of the outer mold, and then the elasticity of the molded endless belt is The molding is completed by peeling it off from the middle mold. This peeling is performed after moving the middle mold to a position where it is not affected by the outer mold, making it easier to peel off the endless belt with many bar-shaped protrusions that are difficult to peel. This improves work efficiency and eliminates strain. This can prevent danger to workers and an increase in the incidence of defective products caused by peeling that is performed improperly.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view, FIG. 2 is a sectional view, FIGS. 3 to 5 are schematic sectional views showing the molding process, and FIG. 3 is an exploded perspective view. Showing the vulcanized rubber plate placed on the middle and outer molds,
Fig. 4 shows the pressurized state of the middle mold and the outer mold, Fig. 5 shows the separated state of the middle mold and the outer mold, and Fig. 6 is a perspective view of the endless belt, which is turned upside down from the molded state. It is. 1... Medium size, 2... Endless belt, 4... Rod-shaped projection, 5... Forming hole, 7... Slide pipe, 2
2... Outer mold, 26... Upper unvulcanized rubber plate, 27...
...Lower unvulcanized rubber plate.

Claims (1)

[Scope of Claims] 1. An upper unvulcanized rubber plate is placed on the upper surface of a medium mold in which forming holes for forming rod-shaped protrusions are formed at appropriate intervals on the outer periphery. With the lower unvulcanized rubber plate placed on the inner surface of the outer mold, the upper and lower unvulcanized rubber plates are heated and pressurized between the upper and lower outer molds and the middle mold to place the upper and lower unvulcanized rubber plates inside the forming hole. After the upper and lower unvulcanized rubber plates are connected in an endless manner to form an endless belt, the outer mold and the middle mold are separated, and after the composition of the endless belt has stabilized, it can be slid on the outer periphery of the slide pipe. The middle mold glued to the outer mold is slid along the slide pipe, and after moving outward from a position facing the inner periphery of the outer mold, the molded endless belt is removed. A method for forming an endless belt with bar-shaped protrusions. 2. The slide pipe is slidable in the vertical direction, and among the outer molds divided into a plurality of parts, the outer mold located below the middle mold is pressed from below against the middle mold, the middle mold is pushed up together with the slide pipe, and the outer mold is pushed up above the middle mold. A method of forming an endless belt having a large number of bar-shaped protrusions on its surface as claimed in claim 1, characterized in that the belt is pressed against a positioned upper outer mold and heated and pressurized. 3. A medium mold in which a large number of forming holes for forming rod-shaped protrusions are formed on the outer periphery at appropriate intervals, a slide pipe to which the medium mold is slidably mounted on the outer periphery, and an upper and lower portion divided into a plurality of parts that are pressed against the outer periphery of the medium mold. What is claimed is: 1. An endless belt forming device having a large number of bar-like protrusions on its surface, comprising an outer mold. 4. The endless belt forming device having a large number of bar-like protrusions on the surface according to claim 4, wherein the slide pipe is vertically slidable.