JPH034467Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to an improvement of a confirmation device for a work proceeding to a pressing process in a hot press or the like.

(Prior art) Conventionally, in a hot press, for example, when molding a printed wiring board, the product to be molded is placed on a plurality of hot platens, and the movable platen is pushed up by a ram between the upper platen and the heated hot platen. In this step, heating and compaction is carried out, and when moving to the increasing step for compaction, the transition is made by a signal from a limit switch that determines the timing.

(Problems to be Solved by the Invention) However, in the conventional device described above, if the limit switch is fixed, there is a risk of damage if the switch is brought into strong contact with the rise of the hot platen, and It is difficult to adjust the elevation of the heating platen in consideration of the thickness of the product, and it is not possible to accurately set the transition to each process, making it impossible to obtain a highly accurate molded product.

Therefore, this invention is intended to improve the above-mentioned drawbacks of the conventional method, and is intended to operate the limit switch without fear of damage and to obtain a highly accurate molded product.

(Means for solving the problem) In order to do this, a limit switch that confirms the rising process is suspended on the side of the upper plate so that it can be moved up and down via a support part, and a cam plate that fixes it to the heating plate is lifted. In order to prevent the rod containing the limit switch from falling from a predetermined position, the rod is provided with a stopper that engages with the support section.

(Function) With the above configuration, when pressing the molded product, place the molded product on the hot platen, push it up with the ram, and use the cam plate provided on the side of the hot platen to press the molded product.
Activate the limit switch attached to the tip of a rod that is movably suspended from a support fixed to the side of the upper panel. The limit switch is designed to operate before starting the clamping process (pressure increase process), so when the cam plate comes into contact with it and pushes it further upwards, the limit switch is pressed against the cam plate by the rod's own weight and is activated. The molded product is heated by the hot platen and is heated and pressed between the hot platen and the upper platen. When the pressing process is completed, the conductive plate is lowered, but after a predetermined time, the stopper of the rod is engaged with the support portion, and the limit switch is prevented from falling at a predetermined position by the stopper.

In this way, the limit switch operates without being subjected to an excessive load, and furthermore, the fixing position of the stopper and rod can be easily changed depending on the thickness of the molded product.

(Example) This invention will be further explained with reference to illustrated examples. 1
is a hot press equipped with the device of this invention,
This hot press 1 includes an upper plate 2, a movable plate 3, and a plurality of hot plates 4 sandwiched between them.
A movable platen 3 is supported and fixed by four stays 5 fixed on a lower platen 15, and is guided by a guide shoe 6 along these stays 5, so that the movable platen 3 can be moved upward by a ram 7. . A plurality of heating plates 4 are placed on this movable platen 3, each of which has a built-in heating section and a cartridge heater that is activated by wiring from the outside of the heating plate 4, thereby generating heat. It's summery. Instead of this cartridge heater, it is also possible to heat the cartridge through steam.

A wide cam plate 9 is provided horizontally protruding from the side surface of an appropriate heating plate 4, and this cam plate 9
Above, a rod 10 to which a limit switch 11 is attached to the lower end is supported by a support part 12 so as to be movable up and down, and the support part 12 constituting the lift confirmation device 8 is fixedly provided on the side of the upper board 2. and a stopper 13 that abuts the upper edge of the support portion 12.
is screwed to a predetermined position on the rod 10. The cam plate 9 is adjusted in its screw position with the rod 10 of the stopper 13 so that it comes into contact with the limit switch 11 immediately before the start of the pressing process of the hot platen.

Since the embodiment of this invention has the above-mentioned configuration, the heating platens 4 each place a molded product 14 thereon and rise through the movable platen 3 as the ram 7 rises (FIG. 2A). When it comes to the step of clamping the molded product 14 between the molded parts, the cam plate 9 protruding to the side of the hot platen 4 is connected to the limit switch 1 attached to the tip of the rod 10.
1 and check that the heating plate is rising.

Then, the press enters the clamping (pressure increase) process, but
During this time, the limit switch 11 is operated by being pressed against the cam plate 9 by the weight of the rod 10 alone. (Fig. 2B) When the pressing process is completed, the hot platen 4 is lowered together with the movable platen 3 by the ram 7, but during this time the rod 10 and limit switch 11 are lowered for a predetermined distance while remaining in contact with the cam plate 9. (Figure 2 C) Rod 1
When the stopper 13 fixing the limit at 0 is engaged with the upper edge of the support portion 12, the rod 10 stops lowering, and the limit switch 11 is separated from the cam plate 9 and becomes independent of the cam plate 9.

(Effects of the invention) As mentioned above, the cam plate and the limit switch are in contact and operate only by the rod's own weight, so the limit switch will not be damaged due to excessive load, and the cam plate can be used with a wide width. Since the limit switch is received by the area, there is no misalignment of the rod, and the fixing position of the stopper can be easily moved, so the starting position of the pressing process can be precisely adjusted depending on the thickness of the molded product.
This has the effect of making it possible to press the molded product uniformly.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a hot press equipped with this invention, and FIGS. 2A to 2C show the operation of the lift confirmation device of this invention. 1... Hot press, 2... Upper plate, 3... Movable plate, 4... Heat plate, 5... Stay, 7... Ram, 8
...Rise confirmation device, 9...Cam plate, 10...
... Rod, 11... Limit switch, 12...
Support part, 14... Molded product, 15... Lower plate.

Claims (1)

[Scope of utility model registration request] A rod is movably supported by a support section attached to the side of the upper panel, and a limit switch is provided below the rod that comes into contact with a cam plate attached to the side of the heating plate, so that the limit switch does not fall below a predetermined position with respect to the upper panel. A lifting confirmation device for hot presses, etc., consisting of a stopper attached to the rod.