JPS6144655B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film forming apparatus for vacuum molding.

Conventionally, this type of film forming apparatus has a film drawer conveyor for drawing out the film, a heater cart for moving the heater, a film lifter for holding the film by suction on a film holding frame, and a model plate (pattern) for holding the film. It consists of a pattern lifter and the like to be attached to the machine, and each requires a driving device such as a cylinder or a motor. As a result, the entire device became complicated, resulting in increased costs, and there were many problems with the control circuit, and furthermore, maintenance and inspection were troublesome, among other problems.

The present invention aims to solve these problems. The configuration of the present invention will be explained below based on examples. Reference numeral 1 denotes a frame composed of a vertical frame 2 erected on a foundation at a predetermined interval, and a guide frame 3 installed between the upper ends of the vertical frame 2 and having one side protruding. A dolly 5 with wheels 4 engaged with a guide frame 3 is movably provided on the upper part of the frame 1, and a heater box 6 with a hollow bottom opening is mounted on the bottom surface of the dolly 5. A heater 7 is installed and attached to the section. Reference numeral 8 denotes an elevating cylinder attached downward to the end of the truck 5. A film holding frame 10 having a decompression chamber 9 around the outer periphery is suspended and supported from the lower end of the piston rod 8a via a support member 11. ing. On the lower surface of the film holding frame 10, a seat 12 has intake holes (not shown) formed at approximately equal intervals along the periphery. It is installed in line with the air hole (not shown), and by the negative pressure operation of the decompression chamber 9,
Negative pressure is applied to the lower surface of the seat 12. Further, on the outer wall of the film holding frame 10,
A suction hose 13 whose one end is connected in communication with a vacuum pump (not shown) is connected in communication with the decompression chamber 9 . 14 is the bracket 1 at the upper end of the frame 1.
A traveling cylinder is fixedly installed through a piston rod 14a, and a truck 5 is connected to the tip of the piston rod 14a through a cylinder bracket 16.
By the operation of the traveling cylinder 14, the film is moved along the guide frame 3 while the heater 7, film holding frame 10, etc. are suspended from the lower surface. Reference numeral 17 denotes a film stretching plate installed in the middle part of the vertical frame 2 below the trolley 5, and a hollow ventilation plate is provided on the outer surface of one end of the film stretching plate 17, one end of which is connected to a vacuum pump (not shown). A seat 19 having an air intake hole (not shown) is fixed to the upper surface of the film air-fixing suction box 18. It communicates with the ventilation passage through a perforated ventilation hole (not shown). A nichrome wire cutter 20 is disposed on the outside of the film fixing suction box 18 so that the blade surface that contacts the film 25 is located slightly below the film fixing suction box 18, and a nichrome wire cutter 20 is placed on the outside of the other end of the film stretching plate 17. A film roll 21 is installed. Reference numeral 22 denotes a model plate positioned and placed on the upper surface of the reversible fork 23. The model plate 22 is equipped with a decompression chamber 24 inside and has a plurality of ventilation holes (Fig. (not shown) is perforated. In addition, 25 is a film.

In this structure, when the film 25 from the film roll 21 is sucked and held at one end by the fixed suction box 18 and unwound onto the film extension plate 27, the lowering operation of the lifting cylinder 8 causes the film extension plate 27 to be unwound. The film holding frame 10 waiting above is lowered, while the film holding frame 10
A suction action is exerted on the lower surface of the film 25 by the negative pressure operation of the decompression chamber 9, and the film 25 on the film extension plate 27 is suction-held on the lower surface of the film holding frame 10 and transferred to the film holding frame 10 ( (See Figure 1). Thereafter, the film holding frame 10 is again raised to its original position by the operation of the lifting cylinder 8, and moved forward vertically above the model plate 22 while holding the film 25 by suction on the lower surface by the pushing operation of the traveling cylinder 14 ( (See Figure 2). In this state, the film 2 held on the lower surface of the film holding frame 10
5 is heated and softened by a heater 7, and after being heated for a certain period of time, the film holding frame 10 is moved to a lifting cylinder 8.
, the bottom surface of the nichrome wire cutter 2
The film 25, which has been lowered to a position 20 to 30 mm below zero and held by suction to the film fixing suction box 18 and the film holding frame 10, is moved to the nichrome wire cutter 2.
0 and is melted and cut (see Figure 3). Subsequently, the film holding frame 10 is lowered by the lowering operation of the lifting cylinder 8, and as shown in FIG.
Due to the negative pressure on the two surfaces, the film is transferred to the model plate 22 side and attached tightly to the surface of the model plate 22, completing the film forming (see FIG. 4). Thereafter, the film holding frame 10 is raised to its original position by the operation of the lifting cylinder 8, and the above operation is repeated again.

In short, the present invention provides a movable trolley above the model board, a heater device fixed to the lower surface of the trolley, a through opening at the top and bottom directly below the heater device, and an outer circumferential wall. A film holding frame having a decompression chamber connected to a suction device at one end and having a ventilation hole in its lower surface communicating with the decompression chamber is suspended from the lower surface of the trolley so as to be movable up and down, and the heater On the side of the model plate in the lower part of the device, a film stretching plate whose size is larger than the outer size of the film holding frame is arranged, and on the outer surface corresponding to the film stretching plate, the inner part of the trolley is placed. A film fixing suction box is provided, which has a tubular ventilation passage that is elongated in a direction perpendicular to the traveling direction and is connected to a suction device at one end, and has a suction hole in communication with the ventilation passage on the upper surface. Since the film cutting device is installed outside the film fixed suction box, there is no need for a film conveyor, film lifting cylinder, etc., making the entire device simpler and more compact, and there are fewer troubles with the control circuit, etc. Furthermore, it has excellent effects such as easier maintenance and inspection, and a significant reduction in equipment costs.
The impact on this type of industry is significant.

[Brief explanation of the drawing]

1 to 4 are process diagrams showing an embodiment of the present invention. 5... Truck, 7... Heater device, 9... Decompression chamber, 10... Film holding frame, 17... Film extension plate, 18... Film fixing suction box, 22...
model board.

Claims (1)

[Claims] 1. A trolley movably installed above the model board, a heater device fixed to the underside of the trolley, and a heater device that is suspended and supported so as to be movable up and down from the underside of the truck, located directly below the heater device. - a film holding frame having a through opening at the bottom and a decompression chamber with one end connected to a suction device in the outer peripheral wall, and a plurality of ventilation holes in the bottom surface communicating with the decompression chamber; A film stretching plate is disposed on the side of the model plate below the heater device and has a dimension larger than the outer dimension of the film holding frame, and a film extension plate is fixedly attached to one outer end of the film stretching plate corresponding to the model plate. It has a tubular ventilation passage which is elongated in the direction perpendicular to the traveling direction of the trolley and is connected to the suction device at one end, and has a plurality of ventilation holes on the upper surface communicating with the ventilation passage. A molding device for use in a vacuum molding method, comprising a fixed suction box and a film cutting device disposed outside the fixed suction box.