JPH01246000A - Vacuum pressing apparatus and control method - Google Patents

Abstract

PURPOSE:To prevent oxidization of a copper foil, to make unnecessary of time for needing heating and cooling of the hot plate and to enable the pressing work at low cost by executing the carry-in and carry-out of a material to be worked to the hot press in vacuum. CONSTITUTION:While shifting a movable flame of the put-in part 41 for the material to be worked under condition of opening the opening/shutting door (c) to downward along the fixed frame, the material 10 to be worked before treating is laid on the roller table 41a in order through the opening hole of the door (c) from a supplying conveyor 43. Then, when the material 10 to be treated before treating on each roller table 41a, respectively, by shutting the door (c), the air in the vacuum chamber 1 is sucked to again make the vacuum condition. At the time, when opening/shutting door (a), (b) are closed, the pressurized-clamping treatment is progressed with the hot pressurizing press mechanism 5 and cold pressurizing press mechanism 6, and supplying of the material 10 to be worked into the vacuum chamber 1 and removal of the air in the inner part are progressed at the same time with the hot pressurizing press and the cold pressurizing press treatments to the material 10 to be worked. By this method, the time needing the heating and the cooling of the hot plate is made to unnecessary and the loss of heat energy is a little and the work is executed at low cost.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a vacuum press device configured to hot-press a workpiece such as a printed circuit board in a vacuum F8 and then cold-press it, and a method for controlling the same. Regarding.

[Prior art and its problems] In general, methods for press forming glass epoxy copper-clad substrates, etc. include a method in which heating and cooling are performed using a single press machine, and a method in which a hot press and a cold press are respectively dedicated to the press. There is a method using a so-called transfer press (or tandem press) in which the material is moved between two press devices to form the material. The molding temperature is isoC to 200C in the case of a glass epoxy substrate.

In addition, there is a vacuum press machine that performs molding in a vacuum because it is necessary to remove moisture contained in the material and degas the gas generated during molding, but in the latter case, only the hot press machine is kept in a vacuum state and cooled. Generally, pressure press equipment is not evacuated.

By the way, for example, Teflon group J! i, etc. 350
In molding at a high temperature of .degree. C. to 400.degree. C., oxidation of the copper foil due to this high temperature becomes a major problem. That is, when copper foil is exposed to an oxygen-containing atmosphere (large air) at such high temperatures, an oxidation layer immediately forms on its surface. W is formed, resulting in a defective product due to poor conduction.

In a transfer press in which only the hot press device is in a vacuum state, the material is transferred from the hot press device to the cold press device at high temperatures, and the copper foil is exposed to the atmosphere during this transfer. Therefore, it cannot be used for molding at such high temperatures.For this reason, after the material is placed in the press machine, it is heated and cooled in a vacuum state of 7g, so the high temperature copper foil is exposed to the atmosphere. Using a vacuum press machine that performs heating and cooling without exposure, the temperature of the hot plate is gradually raised from room temperature in the pressed state.
It is manufactured by heating and compressing at a predetermined degree of pressure for a predetermined period of time, slowly cooling it to room temperature, and then taking it out.

However, in forming with a vacuum press device in which heating and cooling are performed in one press device as described above, the press device (hot plate) must be heated and cooled to the rB degree when heating and cooling the material. There are problems in that this cycle is time consuming and the cost of thermal energy is high.

[Purpose of the invention] In view of the above circumstances, the present ff1ljJ is capable of preventing oxidation of copper foil, and simultaneously running each manufacturing process in parallel to suppress loss of thermal energy and improve productivity. The purpose of this invention is to provide a vacuum press device and a control method.

[Means for Solving the Problems] To achieve the above objects, the present invention provides a supply mechanism for supplying a workpiece, a hot press mechanism for hot press pressing a workpiece,
A vacuum transfer press device is constructed by installing a cold press mechanism that cold presses a workpiece that has already been hot press pressed into a vacuum chamber adjacent to phase m and isolated via an opening/closing door. vacuum transfer press equipment,
After the workpiece that has been cold-pressed by the cold-pressing mechanism is taken out of the vacuum chamber, the workpiece that has been hot-pressed by the hot-pressing mechanism is transferred to the cold-pressing mechanism by the supply mechanism. At the same time, the workpiece is supplied from the supply mechanism to the hot press ma, and then the workpiece is supplied from outside the vacuum chamber to the supply mechanism while the supply mechanism and the hot press mechanism are isolated. It is something to control.

[Example] Below is Book 11. One embodiment of the present invention will be described based on the drawings.

The vacuum press device shown in Figs. 1 and 2 has three vacuum chambers 1 to 3, which are adjacent to each other and isolated via opening/closing doors a and b, arranged in a row, and is used to hold printed circuit boards, etc. taken in from vacuum chamber 1. The workpiece IO is hot-pressed and then cold-pressed to form the workpiece, and after the forming is completed, it is taken out from the vacuum chamber 3,
This is a so-called transfer press device.

Here, the vacuum chambers 1-3 are made into a vacuum state fm by removing internal air by a vacuum generator (not shown), and the opening/closing doors a, b are connected to the vacuum chambers 1-3 by actuators (not shown). It is configured to slide along the partition wall and close the opening in the partition wall.

A workpiece 10 brought in from outside the vacuum chamber (atmospheric side) is stored in the vacuum chamber l, and the stored workpiece lO is supplied to the adjacent vacuum chamber 2 (and the workpiece 10 inside the vacuum chamber 2 is A supply mechanism 4 is installed for transferring (transferring to the vacuum chamber 3).

The vacuum chamber 2 is equipped with a hot press mechanism 5 for hot pressing the workpiece 10, and the vacuum chamber 3 is equipped with a hot press mechanism 5 for hot pressing the workpiece 10. A cold press mechanism 6 for cold pressing 10 is installed.

The supply mechanism 4 includes a roller stand 41a on which the workpiece 10 is placed.
The rIT motion frame, which is fixed in multiple stages downwards at predetermined intervals, is placed in a vacuum chamber! A workpiece storage section 41 that is movable up and down along a fixed frame fixed therein, and an opening/closing door a
The transport section 42 is constructed by fixing a suppressing member 42b to a movable frame 42a provided on the ceiling of the vacuum chamber l so as to be movable in a direction a in contact with the roller table 41a.

The vacuum chamber 1 is provided with an opening/closing door C that is open to the outside (atmospheric side), and the workpiece 1O is transported by a supply conveyor 43 provided outside the opening/closing door C.
The Jic is carried into the vacuum chamber l through the opening opened,
A is placed on the roller stand 41a.

In addition, the heat press l & structure 5 installed in the vacuum chamber 2 adjacent to the vacuum chamber l via the opening/closing door a is made of aluminum using a fixed platen and hydraulic pressure (not shown). # It is configured by arranging a plurality of hot plates 52 between the movable fi 51 that moves, and the movable fi 51
By raising the hot plate 52 by t-,,h, the plurality of hot plates 52 are sequentially placed on the movable plate 51 from the bottom and finally sandwiched between the fixed plate and each hot plate 52 receives 1LH! In this method, the workpiece 10 to be processed is subjected to thermal compression treatment at a predetermined pressure and heat.

A cold press mechanism 6 installed in a vacuum chamber 3 adjacent to the vacuum chamber 2 via an opening/closing door is moved up and down with a fixed plate (not shown) in the same way as the hot press mechanism 5. A plurality of press plates (cold plates) 62 are provided between the T moving plate 61 and
The workpiece 10 placed on the plurality of press plates 62 is subjected to cold compression treatment by raising the 01 movement q161.

In addition, the vacuum chamber 3 is provided with an opening/closing door d which is configured similarly to the opening/closing doors a and b and is opened to the outside* (atmospheric side), and is cooled by the cold press mechanism 6 of the vacuum chamber 3. The liquid-filled product 10 that has been press-pressed and molded is carried out by opening the opening/closing door d.

On the outside of the opening/closing door d, there is a receiving mechanism 8 to which the workpieces 1O placed on the press plate 62 are transferred, and
A transfer J mechanism 7 for transferring the workpiece 10 to the receiving machine MR8, and a delivery conveyor 9 for sending out the workpiece IO received by the receiver a4IJ8 are provided.

In the receiving mechanism 8, an elevating frame (not shown) to which plates 81 provided in several stages corresponding to the hot plate 52 and the press plate 62 are fixed can be raised and lowered with respect to a fixed frame (not shown) fixed to the main body. It is installed in

Further, the transfer mechanism 7 has claw members 71 supported movably in the transfer direction, respectively, on the lower surface of the tray plate 11 holding the liquid filler 10 placed on the upper surface of the press plate 62. Hook and press plate 62F to plate 81
It moves it all the way up.

The vacuum transfer press apparatus configured as described above is operated and controlled automatically or manually by a control device (not shown) as described below.

First, when the cold compression process by the cold press mechanism 6 installed in the vacuum chamber 3 is completed, the gJ of the cold press mechanism 6 is
@61 is moved downward to open the spaces between the press plates 62, and the opening/closing door d opens the vacuum chamber 3 to the atmosphere.
Then, with the lifting frame of the receiving mechanism 8 raised and lowered to a predetermined position in the h direction, the moving mechanism 7 is moved to the opening/closing door d side, and the claw member 71 is moved to the workpiece placed on each press plate 62. 10 is hooked on the lower surface of the tray plate 11 that supports the
The workpiece 1O is pulled out and transferred to the plate 81H.

The workpieces 1o transferred to the plate 81 are sequentially transferred to the subsequent process by the delivery conveyor 9 starting from the workpiece 10 placed on the plate 81 located at the lowest position by moving the lifting frame downward. It will be transported to the destination.

On the other hand, when the door d is opened and the processed workpiece 10 is removed from the cold press mechanism 6, the door d is closed and the internal air is sucked again to bring the inside of the vacuum chamber j into a vacuum state.

When the hot press process by the hot press mechanism 5 is completed,
The movable g151 is moved downward to widen the space between each hot plate 52, and after the vacuum chamber 3 is in a vacuum state, open 12 (doors a and btt are opened at the same time, vacuum chambers 1 to 3 are kept in a vacuum state, and FM4 is closed) , b.

Here, 41g! tJrih frame 42a of the sending section 42
Move it in the direction approaching the opening/closing door a, and press the hot-pressed workpiece 10 placed on the hot plate 52 of the hot-press press aa5 with the tip of the suppressing member 42b attached to the movable frame 42a. It is moved to the vacuum chamber 2 side and transferred onto the breath plate 62 of the cold press mechanism 6.

Next, after returning the suppressing member 42b to the initial position at the right end in the figure, the workpiece storage section 41 is moved upward, and the unprocessed workpiece placed on the roller stand 41a of the workpiece storage section 41 is The workpiece 10 is also transferred onto the hot plate 52 while being suppressed by the tip of the suppressing member 15.

In this way, the hot press 7m structure 5 and the cold press mechanism 6
When the workpiece lO is supplied to each of the opening/closing doors a,
b is closed to allow the hot press and cold press to proceed at the same time, and the workpiece l is supplied from the outside to the supply mechanism 4 in the vacuum chamber 1.
Replenish O.

That is, with the opening/closing door C open, the workpiece storage fi41
While moving the movable frame downward along the fixed frame, unprocessed workpieces lθ are sequentially placed a on the rotor table 41a from the supply conveyor 43 through the opening of the opening/closing door C. Then, each roller 4.141a has an evil J'[
! When the previous workpiece 10 is placed at 41L, the opening/closing door C is closed and the internal air of the vacuum chamber I is sucked to create a vacuum state again.

The pressing process by the hot press mechanism 5 and the cold press mechanism 6 may be allowed to proceed from the time when the opening/closing doors a and b are closed, and the supply of the workpiece lO to the vacuum chamber l and the removal of internal air are performed as soon as possible. This process is carried out simultaneously with the hot press treatment and the cold press treatment of the workpiece 10.

In the above embodiment, the material conveyance direction is linear and the mechanical parts are arranged in series. However, the arrangement of the mechanical parts can be changed as appropriate. For example, the hot press mechanism and the cold press mechanism can be It is also possible to arrange the pressure press mechanism in parallel and install a supply/takeout mechanism integrating the supply mechanism and the receiving mechanism in front of both devices so as to be movable from side to side.

[Effects of the Invention] As explained above, according to the present invention, the copper foil is not oxidized by carrying the workpiece into and out of the hot press in a vacuum, and the hot press This allows simultaneous operation of the press and cold press, and also allows replenishment of the workpiece to the supply mechanism and evacuating the end of the supply machine during processing of the workpiece.

As a result, the time required for heating and cooling the hot plate is not required, and the vacuum chamber can be suctioned during the processing time.
Furthermore, there is little loss of thermal energy due to heating and cooling of the hot plate, making it possible to perform pressing operations at a reasonable and low cost.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a vacuum press apparatus showing an embodiment of the present invention rJ1, and FIG. R2 is a side view of the configuration.

Claims (2)

[Claims] (1) A supply mechanism that supplies the workpiece, a hot press mechanism that hot presses the workpiece, and a cold press mechanism that cold presses the hot pressed workpiece are adjacent to each other. A vacuum press device characterized in that it is configured by being installed in vacuum chambers that are isolated from each other through an opening/closing door. (2) After the workpiece that has been cold-pressed by the cold-pressing mechanism is taken out of the vacuum chamber, the workpiece that has been hot-pressed by the hot-pressing mechanism is transferred to the cold-pressing mechanism by the supply mechanism. At the same time, supplying the workpiece from the supply mechanism to the hot press mechanism, and then supplying the workpiece from outside the vacuum chamber to the supply mechanism while the supply mechanism and the hot press mechanism are isolated. 2. The method of controlling a vacuum press apparatus according to claim 1, further comprising the step of: