JPS59104296A - Hot press - Google Patents

Abstract

PURPOSE:To provide a hot press which permits processing with high accuracy by fixing metallic plates or resin plates to the top and bottom side of a honeycomb material and uniting both into the sandwitch construction having parallelism with high accuracy in constituting the heat insulating plates to be inserted between a bolter and a hot plate. CONSTITUTION:Upper and lower heat insulating plates 21, 22 attached by means of lock bolts 7, 14 to upper and lower bolsters 4, 13 of a hot press are provided between the above-mentioned upper and lower bolsters 4, 43 and upper and lower hot plates 6, 11. Materials to be formed, such as multilayered printed plates, are inserted between the plates 6, 11 and intermediate hot plates 8, 8. Heat energy for forming is applied on the respective plates 6, 8, 11 from a heater 15 and an oil pressure is supplied from a hydraulic device 16 to a ram cylinder 2 and a counter cylinder 9 to press and adhere the materials to be processed. Said plates 21, 22 are made into the construction wherein a honeycomb material 17 is sandwiched, via an adhesive agent 18, by metallic plates 19, 19 and the outside circumference thereof is protected by heat insulating fibers 20. A good heat insulating effect is thus obtd. and the parallelism of high accuracy obtd. by by machining is prevented from changing with age.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a hot press suitable for bonding multilayer printed wiring boards of various electronic devices such as computers.

[Prior art]

As shown in FIG. 1, in a conventional hot press used for bonding multilayer printed wiring boards, a lower bolster 4 is placed on a ram 3 of a ram cylinder 2 fixed to a press body 1. On top, there is a lower heat insulating board 5,
The lower heating plate 6 is fixed with a tightening port 7, and an opening for carrying in and out of the molded object is provided.

An intermediate heating plate 8 is placed on the upper part of the counter cylinder 9.
At the top, an upper hot plate 10 is thermally insulated by an upper heat insulating plate 11 and is fixed with tightening bolts 14 to an upper bolster 13 connected to the press body 1 by struts 12. This hot press inserts a molded object such as a multilayer printed board between a lower hot plate 6 and an intermediate hot plate 8, and between an intermediate hot plate 8 and an upper hot plate 10,
Molding thermal energy is applied to each of the hot plates 6, 8, and 11 by a heating device 15, and at the same time, hydraulic pressure is supplied to the ram cylinder 2 and counter cylinder 9 from a hydraulic device 16 to bond the objects to be processed under pressure.

By the way, the upper and lower bolsters 4 and 13 and the upper and lower hot plates 6.1
0't - Since the upper and lower heat insulating plates 5, 11 that thermally insulate are inserted into the upper and lower bolsters 4, 13, the upper and lower heat insulating plates 5, 11 have a length of 0.03 mm for a length of 500 mm due to accuracy.
Parallelism of less than a millimeter is required.

However, the conventionally used heat insulating boards 5 and 11 made of asbestos fiber have a standard length of 50 mm due to the machining of the insulating boards alone.
Since parallelism of only about 0.1 to 0.2 mm can be obtained with respect to 0 mm, after assembling it to the bolster,
Sushi was used after being adjusted by processing or shims.

Parallelism is obtained using this method, and asbestos fibers change over time due to thermal cycles, making it difficult to maintain parallelism, so the drawback is that parallelism correction work is carried out approximately every year. there were.

[Purpose of the invention]

In view of the above points, the present invention has been developed based on the accuracy of the parallelism of the hot plate into which the object to be adhered is inserted. The aim is to improve / ζ.

[Summary of the invention]

In order to manufacture a hot press with high precision, it is necessary to use a heat insulating board between the heating part and the main body that has a good insulation effect, can be processed with high precision, has a homogeneous compressive elastic modulus, and has little change over time. Based on this idea, we created a @heat plate that is integrated into a sand inch structure using a metal or resin plate that is easy to process on honeycomb material.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

In FIGS. 2 and 3, the same reference numerals as in FIG. 1 indicate the same parts.

21.22 are the upper and lower bolsters 4, 13 and the upper and lower hot plates 6,
The upper and lower heat insulating boards 21 and 22 are inserted between the upper and lower heat insulating boards 110, and the upper and lower heat insulating boards 21 and 22 are made of nicum material 17 which is sandwiched with a metal plate 19 via adhesive 18, and the outer periphery of which is covered with insulating fibers 20. The structure is protected by

The insides of the heat insulating plates 21 and 22, which are formed by sandwiching the honeycomb material 17 with the metal plate 19, have countless small airtight chambers, so that no convection occurs and the heat insulating effect is extremely good. In addition, since the sandwich inch is made of a metal plate, high-precision parallelism can be obtained by machining after forming the cam sandwich, and the accuracy as a hot press can also be improved.

For example, as the heat insulating board 21, 22, a metal plate made of Nomex (nylon nonwoven fabric) as a base material is formed into a sandwich structure with metal plates using phenol resin, and then sandwiched. If processed, compressive elasticity modulus is 5.0×10' kg/cr/l, parallelism standard length is 0.02, thermal conductivity is 0.0
3 to 2 I/m-h-'I:: A heat insulating board with a aging change of about 5 times that of asbestos fiber can be obtained. If this heat insulating board is used in a hot press, there is no need for any combination modifications, and the press accuracy can maintain the parallelism of JISB6403 precision class special grade for about 5 years.

〔Effect of the invention〕

According to the hot press of the present invention, the parallelism of the hot plates into which the objects to be adhered are inserted can be obtained with high precision.

Therefore, it has a great effect on bonding work of objects to be bonded, such as multilayer printed wiring boards.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of a conventional hot press, FIG. 2 is a sectional view of a heat insulating plate in the hot press of the present invention, and FIG. 3 is a schematic front view of the hot press of the present invention. 1... Press body, 2... Ram cylinder, 4.1
3... Upper and lower bolsters, 15... Heating device, 16...
・Hydraulic device, 17...Honeycomb material, 20...Insulating fiber, 21° 22...Upper and lower insulation board. Agent Patent attorney Toshiyuki Usuda 1 mouth μ Figure 2 'f, 3 mouth

Claims (1)

[Claims] In a hot press, a workpiece is heated and pressurized between bolsters, and a heat insulating plate is inserted between the bolster and the hot plate.
A hot press characterized in that the heat insulating plate is formed into a sandwich structure by integrally fixing the upper and lower sides of the non-nikum material to a metal plate or a resin plate.