JPH0351133Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an apparatus for vulcanization molding rubber in a vacuum.

(Prior Art) Conventionally, a formwork is interposed between a pressure receiving member provided with a heating plate provided on the forming frame body and a pressure member provided with a heating plate provided vertically movably relative to the pressure receiving member, and the formwork is An airtight surrounding frame is provided, and after the inside of the frame is evacuated, the rubber material interposed in the form is vulcanized and molded, and the frame is used to connect the pressure-receiving member and the pressure-applying member. A structure consisting of a cylindrical member provided on one side and a piston-like member inserted into the cylindrical member provided on the other side, and having packing provided on the circumferential surface of the piston-like member is disclosed in Utility Model Application Publication No. 59-155118. Known in the official gazette.

(Problem that the invention aims to solve) However, with this device, the piston-shaped member is heated by the hot plate and its outer circumference is about 150°, so workers may get burns if they touch it. There are other disadvantages, and a further disadvantage is that heat-resistant packing, which has lower strength and durability than ordinary packing, must be used as the packing.

(Means for Solving the Problems) The present invention provides a device free from such inconveniences, which includes a pressure receiving member provided with a heating plate provided in the forming frame body, and a heating plate provided vertically movably with respect to the pressure receiving member. A formwork is interposed between the pressure member provided with the pressure member and a surrounding frame that airtightly surrounds the formwork, and the inside of the surrounding frame is evacuated. A cylindrical member which is sulfur molded and has the surrounding frame provided on either one of the pressure receiving member and the pressure member;
a piston-like member inserted into the cylinder-like member provided on the other side, and packing is provided on the circumferential surface of the piston-like member, wherein the piston-like member is an inner member supported by the heating plate; , and an outer member having the packing on the circumferential surface surrounding the outer member, and the two members are bonded together by a heat insulating material provided between the two members so that they do not come into contact with each other.

(Function) In this case, the heat insulating material can prevent the temperature from rising at the outer periphery. In other words, when no insulation material is used, the temperature at the outer periphery rises to about 150°C, but by using insulation material, it can be maintained at around 90°C. The risk of getting burned is reduced, and the temperature at the outer periphery is lowered, making it possible to use durable packing other than heat-resistant packing, such as nitrile rubber.

(Example) An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawings, reference numeral 1 denotes a pressure receiving member 2 including a heating plate 2a, and a pressure member 3 including a heating plate 3a that is vertically movable relative to the pressure receiving member 2.
4 is a mold interposed between both members 2 and 3; 5 is a surrounding frame that airtightly surrounds the mold 4; inside the surrounding frame 5 is a vacuum device (not shown). ), and after evacuating the inside of the surrounding frame 5, the formwork 4
The rubber material inserted inside is vulcanized and molded. The surrounding frame 5 is composed of a cylindrical member 6 provided on one of the pressure receiving member 2 and the pressure applying member 3, and a piston-like member 7 inserted into the cylindrical member 6 provided on the other. A packing 8 is provided on the circumferential surface of the piston-like member 7, so that when the piston-like member 7 is inserted into the cylinder-like member 6, both members 6,
The 7 spaces were sealed airtight.

The configurations so far are not particularly different from those proposed earlier.

In this invention, the piston-like member 7 is surrounded by an inner member 7a supported by the hot platen 3a, and the packing 8 is provided around the inner member 7a.
and an outer member 7b with both members 7a,
A heat insulating material 9 is provided between the members 7a and 7b so that the members 7a and 7b do not come into contact with each other, and the members 7a and 7b are bonded together. A pressure receiving member 2 is provided in the upper part, and a pressure member 3 is provided in the lower part facing the pressure receiving member 2, and the cylinder-shaped member 6 is attached to the pressure-receiving member 2 side, and a piston-shaped member 7 is attached to the pressure member 3 side, The piston-like member 7 has a support base for the formwork 4 placed on the hot plate 3a provided on the pressure member 3, and the lower outer side of the inner member 7a constituting the piston-like member 7 A protrusion 7a-1 is provided on the circumferential surface, and a protrusion 7 is provided on the inner upper circumferential surface of the outer member 7b.
b-1, and these protrusions 7a-1, 7b-1
The above-mentioned heat insulating materials 9 were interposed between the upper and lower parts, and as shown in FIG. 2, these were tightened and fixed together from the upper surface with screws 10.

The packing 8 applied to the outer periphery of the piston-like member 7 is a hollow O-ring-shaped one made of nitrile rubber, etc., as shown in FIG. A ribbon-shaped concave groove 1 is provided on the circumferential surface of the piston-like member 7.
1 and then fixed with a band 12, or as shown in FIG.
After it is inserted into the packing 8, it is fixed by forcing air or cold water into the hollow part, and in particular, if cold water is forced into the hollow part, the temperature of the packing 8 can be further lowered, which is advantageous. When hiding, the packing 8 can be kept at a relatively low temperature, so
It is also possible to contain lubricating oil within the pleats 8a.

Incidentally, when the heat insulating material 13 is also applied to the cylinder member 6, the amount of heat transmitted to the packing 8 via the cylinder member 6 can be reduced.

Note that the pressure member 3 has a work table 1 that protrudes to the side thereof.
4, and the surrounding frame 5 is attached to the workbench 1 together with the formwork 4.
4 by a piston cylinder device 15, so that work such as taking out the product from the formwork 4 can be performed on the workbench 14.

To explain this, the piston-like member 6 and the cylinder-like member 7 are connected by a connecting member 16, and the work table 14 and the forming frame body 1 are connected to each other at the same time via the connecting member 16.
The cylindrical member 7 has one end thereof connected to the connecting member 16 by a shaft 17, and a piston cylinder is connected between the cylindrical member 6 and the connecting member 16. A device 18 is interposed, and by the action of the device 18, the cylindrical member 6 is reversed approximately 90 degrees on the workbench 14 about the shaft 17 as shown in FIG. I did it like that.

The formwork is divided into upper and lower parts, an upper mold 4a and a lower mold 4b.
The upper frame 4a was attached to a cylinder-shaped member 6, and the lower mold 4b was attached to a piston-shaped member 7.

Next, a method for attaching a mold and vulcanization molding using this apparatus will be explained.

First, as shown in FIG. 6a, the surrounding frame 5 is moved to the top of the work No. 14, and in this state, the lower mold 4b is attached to the piston-like member 7, and then the upper mold 4a is placed on the lower mold 4b.
The cylinder-shaped member 6 is placed opposite to the piston-shaped member 7 as shown in FIG. Then, the upper die 4b is tightened and fixed to the cylindrical member 6 with screws 20. (Fig. 6c) Next, in order to perform vulcanization molding, the pressure member 3 is moved downward to separate the upper and lower molds 4a and 4b, and after supplying the rubber material during this time, the cylindrical member 6
and the piston-like member 7 are moved onto the forming frame main body 1, the piston-like member 7 is pushed up, the piston-like member 4b is inserted into the cylinder-like member 6, and the surrounding frame 5 is moved.
After the inside is made airtight and evacuated using a vacuum device, the upper and lower molds 4a and 4b are pressed together by the pressure member 3, and the rubber applied inside the molds is pressure-molded.

(Effect of the invention) As described above, according to the invention, the piston-like member is composed of an inner member supported by a heating plate and an outer member having the packing on the circumferential surface surrounding the inner member, and the piston-like member is configured to have Since the two members are bonded together with a heat insulating material provided to prevent the two members from coming into contact with each other, the outer member is prevented from being extremely heated by the heat from the heating plate, and this prevents the outer member from being heated excessively by the heat from the heating plate. A device that can reduce the risk of getting burnt by touching it, and also allows the use of general packing provided on the outer periphery of the piston-like member, which is stronger than heat-resistant packing, and can be used safely for a long period of time. There are effects such as obtaining.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of an example of the implementation of the present invention, Fig. 2 is an enlarged cutaway sectional view of the main part, and Fig. 3 is a partially cutaway side view of an example of implementing the present invention.
The figures are a plan view of the piston-like member, Figures 4 and 5.
The figure is an enlarged cross-sectional view of main parts showing a modification, and FIG. 6 is a diagram illustrating the operating state. 1... Pressure member, 2... Pressure receiving member, 3... Pressure member, 4... Formwork, 5... Surrounding frame, 6... Cylinder-shaped member, 7... Piston-shaped member, 7a... Inside Member, 7b... Outer member, 8... Packing.

Claims (1)

[Scope of utility model registration request] a pressure receiving member including a heating plate provided in the forming frame body;
On the other hand, a formwork is interposed between the pressurizing member having a heating plate that is movable up and down, and a surrounding frame is provided to airtightly surround the formwork, and the inside of the surrounding frame is evacuated. A cylindrical member in which a rubber material interposed in a mold is vulcanized and formed, the surrounding frame being provided on one of a pressure receiving member and a pressure member, and the cylindrical member provided on the other. A piston-like member inserted into the inner member and a packing provided on the circumferential surface of the piston-like member, wherein the piston-like member is connected to an inner member supported by the heating plate, and the inner member surrounding the inner member. An apparatus for vulcanizing and molding a rubber material, comprising an outer member provided with packing, and a heat insulating material provided between the two members so that they do not come into contact with each other.