JP3054008U - Multi-stage vacuum press - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a multi-stage vacuum press using a heating and cooling medium, by shortening the length of a medium flow pipe connecting a flat plate for mounting a medium flow pipe to be incorporated into a vacuum case and a manifold pipe, A large bending stress is generated in the medium flow pipe due to a difference in expansion and contraction of the manifold pipe due to heating and cooling, and fatigue fracture occurs. SOLUTION: A flat plate to which a medium flow passage pipe attached to a manifold pipe is attached, the hole portion through which the medium flow passage pipe is inserted is formed in a horn shape open to the outside of a vacuum case,
The packing is tightly fitted in the gap where the medium flow path pipe is loosely fitted, and is bonded with an adhesive, thereby absorbing the bending stress of the medium flow path pipe due to the difference in expansion and contraction of the manifold pipe, resulting in fatigue. Breaking was alleviated, and the vacuum sealing force was increased as the inside of the vacuum case became more vacuum.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a connection structure of a manifold pipe for supplying a heating and cooling medium into a hot plate of a multi-stage vacuum press.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, in a multi-stage vacuum press using a heating and cooling medium, a predetermined vacuum state must always be maintained in a vacuum case, so that a plurality of hot plates provided inside the vacuum case are heated and cooled. It is necessary to close the gap with the medium flow path pipe for supplying the medium and completely seal the vacuum case so that air or the like does not enter the vacuum case and destroy the inside vacuum state. For this reason, the member for attaching the medium flow pipe (currently a flat plate is used) and the medium flow pipe are joined by welding so as not to leak.

[0003]

[Problems to be solved by the invention]

 However, with recent space savings in factories, the length of the media flow pipe connecting the manifold pipe to the flat plate on which the media flow pipe to be incorporated into the vacuum case is shortened, thereby increasing the length of the manifold pipe due to heating and cooling. A large bending stress is generated in the medium flow pipe due to the difference in shrinkage and shrinkage, resulting in fatigue failure. The present invention solves the above problem, and provides an improved connection structure of a medium flow pipe connecting a flat plate on which the medium flow pipe is mounted and a manifold pipe.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention places a plurality of hot plates on which a workpiece is placed and presses the workpiece, and heats and cools the inside of the hot plate to a predetermined temperature. A medium flow pipe for supplying a medium and connected to a hot plate, a heating and cooling medium supply device for supplying a medium into the medium flow pipe, and an opening for inserting the medium flow pipe. In a multi-stage vacuum press provided with a vacuum case formed and a vacuum pump operating to evacuate the inside of the vacuum case, the medium flow path of a member for mounting a medium flow path pipe mounted on a manifold pipe The hole through which the pipe is inserted is formed in the shape of a bevel that is open to the outside of the vacuum case, and packing is tightly fitted in the gap where the medium flow path pipe is loosely fitted and adhered with an adhesive, The difference in expansion and contraction of the manifold pipe That together to relieve fatigue fracture by absorbing bending stresses in the medium flow path pipe, as the inside vacuum case is if the vacuum is the vacuum sealing force was Unishi by increasing.

[0005]

[Embodiment of the invention]

 FIG. 2 is a cross-sectional view showing a state where the manifold pipes for heating and cooling are assembled in the multi-stage vacuum press machine 11. The airtightness in the vacuum case 6 is maintained by a vacuum pump not shown. The front end flange of the medium flow pipe 8 is connected to the hot plate 10 by a flexible hose 9 to allow the heat medium to flow, thereby performing heating and cooling. The manifold pipe 1 is provided for supply and discharge, and may be attached to both sides of the multi-stage vacuum press 11 or may be attached to one side in parallel. FIG. 2 shows a case in which both sides are mounted.

FIG. 1 will be described in detail with reference to the cross section taken along the line AA shown in FIG. The manifold pipe 1 is connected to a medium supply source for heating and cooling (not shown), and a medium flow path which is disposed in a line on the side surface of the manifold pipe 1 with the vacuum packing 5 sandwiched in the opening of the vacuum case 6. The flat plate 4 to which the pipe 8 is attached is fastened with bolts 7.

The medium flow pipe 8 is fixed to the manifold pipe 1 by welding, and the relative position between the manifold pipe 1 and the flat plate 4 is supported by a positioning plate (not shown). The hole in which the pipe 8 is loosely fitted is formed into a bevel shape opened to the outside of the vacuum case 6, and the packing 2 (an O-ring-shaped heat-resistant silicon sponge packing) is tightly fitted, and elasticity is set in a solidified state. The medium flow path pipe 8 is adhered and held by the adhesive 3 (Cemedine Silicon KE45T in the embodiment). The close contact with the adhesive 3 makes it possible to absorb the bending stress of the medium flow pipe 8 due to the difference in expansion and contraction of the manifold pipe 1 due to thermal expansion. Further, as the inside of the vacuum case 6 is evacuated, the packing 2 is brought closer to the flared side surface of the flat plate 4 and pressed against it, so that the vacuum sealing force is increased.

[0008]

[Effect of the invention]

 The connection structure of the media flow path pipe attached to the manifold pipe of the multi-stage vacuum press according to the present invention is such that a flat medium flow pipe pipe for attaching the manifold pipe to the vacuum case opening has a hole outside the vacuum case. Formed in the form of an open flap and glued with an O-ring packing with an adhesive to absorb the bending stress of the medium flow pipe due to the difference in expansion and contraction of the manifold pipe, so the medium flow pipe can be shortened. This has made it possible to reduce the installation area of the multi-stage vacuum press in the factory, and the structure has been such that the vacuum sealing force increases as the degree of vacuum increases.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line AA in FIG. 2, and is a cross-sectional view showing details of a mounting structure of a manifold pipe and a medium flow path pipe.

FIG. 2 is a cross-sectional view illustrating a multi-stage vacuum press machine incorporating a heating and cooling manifold pipe according to the present invention.

[Explanation of symbols]

 1 ‥‥‥ Manifold pipe 2 ‥‥‥ Packing 3 ‥‥‥ Adhesive 4 平板 Flat plate 5 真空 Vacuum packing 6 真空 Vacuum case 7 ボ ル ト Bolt 8 ‥‥‥ Medium flow pipe 9 ‥‥ ‥ Flexible hose 10 ‥‥‥ Hot plate 11 ‥‥‥ Multi-stage vacuum press

Claims (1)

[Utility model registration claims] 1. A plurality of hot plates for placing a workpiece and pressurizing the workpiece, and supplying a heating and cooling medium to the inside of the hot plate to maintain a predetermined temperature. A medium flow path pipe connected to the plate, a heating and cooling medium supply device for supplying a medium into the medium flow path pipe, and a vacuum case formed with an opening for inserting the medium flow path pipe When,
In a multi-stage vacuum press equipped with a vacuum pump that operates to evacuate the inside of the vacuum case, a hole through which the medium flow path pipe of the member for attaching the medium flow path pipe attached to the manifold pipe is inserted into the vacuum A multi-stage equipped with a heating and cooling manifold pipe, characterized in that it is formed in the shape of a slash open to the outside of the case, packing is tightly fitted in a gap in which the medium flow path pipe is loosely fitted, and bonded with an adhesive. Vacuum press.