JPS6243643Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a film holding frame for a film forming apparatus in vacuum molding.

Conventionally, when creating vertical casting molds using vacuum molding, it was difficult to automate the film forming around the sprue of the model plate, and the process had to be done manually, which caused problems from a productivity standpoint. .

The present invention was developed in view of these problems, and the shape of the model plate near the sprue model part is made into an inclined surface, and the film holding frame in the area corresponding to this inclined surface is closely fitted along the inclined surface. It is an object of the present invention to provide a film holding frame for a film forming apparatus that can be provided in a flexible manner.

The configuration of the present invention will be explained below based on examples. As shown in FIG. 1, a trolley 3 having wheels 2, 2 engaged with a frame 1 is provided so as to be able to move freely, and a cover member 5 having a built-in heating device 4 is attached to the lower surface of the trolley 3. A cylinder 6 is attached to the end of the truck 3, and a frame body 8 of a film holding frame 7 is suspended from the tip of a piston rod 6a via a bracket 9. The film holding frame 7
The frame main body 8 has an inclined surface 8a with a positive slope formed from the lower end to the upper end on one outer side surface, and an inclined surface 10a with a negative slope in the opposite direction to the inclined surface 8a at the lower end of the inclined surface 8a. A rotary frame body 10, which has a rotary frame body 10 on its opposing surface, is rotatably supported by a pin 11 at the lower end of its inclined surface 10a. As described above, the film holding frame 7 is composed of a frame body 8 and a rotating frame body 10, and the lower surfaces of the frame body 8 and the rotating frame body 10 communicate with decompression chambers 8b and 10b provided around the outer periphery. A plurality of film suction holes (not shown) are provided to attract and hold the film 12. A reversing cylinder 13 is rotatably attached to the upper surface of the frame body 8 of the film holding frame 7 via a cylinder bracket 14, and a rotating frame 10 is rotatably attached to the tip of the piston rod 13a via a support bracket 15. connected. Reference numeral 16 denotes a model plate having a decompression chamber 17 inside thereof, and a model 18 is mounted on the upper surface of the model plate 16, and a decompression chamber 17 is provided on the surfaces of the model plate 16 and the model 18. A plurality of communicating ventilation holes (not shown) are drilled, and a sprue model 1
The upper surface of the model plate 16 in the vicinity of 8a is formed with an inclined surface 16a forming an obtuse angle counterclockwise with respect to the horizontal mold mating surface, and the inclined surface 16a can be brought into close contact with the lower surface of the rotating frame 10. has been done.

Next, the operation of the device configured as described above will be explained. As shown in FIG. 1, when the frame body 8 of the film holding frame 7 and the lower surface of the rotary frame body 10 are aligned, the frame body 8
After the film 12 is adsorbed and held on the lower surface of the film holding frame 7 consisting of the rotary frame body 10, the trolley 3 is moved above the model plate 16 by the operation of a traveling cylinder (not shown), and the surface of the model 18 is moved by the operation of the heating device 4. The film 12 is heated and softened so that it can be easily attached to the surface. Subsequently, the cylinder 6 is operated to hold the film on the surface of the model plate 16 and the model 18 which are in a negative pressure state through the decompression chamber 17 and ventilation holes (not shown) by the operation of the vacuum pump (not shown). Lower the frame 7 and move the film 12
The rotating frame 10 is rotated clockwise around the pin 11 by the operation of the reversing cylinder 13 while closely attaching the model plate 1 to the lower surface of the rotating frame 10.
The film 12 on the lower surface of the film holding frame 7 is moved to the model plate 16 by pressing the film 12 on the lower surface of the film holding frame 7 and releasing the negative pressure acting on the lower surface of the film holding frame 7.
Then, the film 12 is transferred to the surface of the model 18, and the film 12 is reliably attached to the surface of the model plate 16, etc. After the transfer of the film 12 is completed, the film holding frame 7 is raised by the reverse operation of the cylinder 6 and separated from the upper surface of the model plate 16, and the rotating frame 10 is rotated counterclockwise by the reverse operation of the reversing cylinder 13. It stops when it is aligned with the lower surface of the frame body 8.

Thereafter, the carriage 3 is moved backward to a film station (not shown) by the operation of a traveling cylinder (not shown), and the film 12 is sucked and held on the lower surface of the film holding frame 7 again. Thereafter, repeat the above operation.

As is clear from the above explanation, according to the present invention, the attachment of film to the model board and the model surface is automated without manual work, resulting in a dramatic improvement in productivity. The contribution it makes to this type of industry is significant.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a model plate and the process of attaching a film to the model surface. 7: Film holding frame, 8: Frame body, 10: Rotating frame body, 8a, 10a: Inclined surface.

Claims (1)

[Scope of utility model registration request] A frame body 8 having an inclined surface 8a forming an acute angle with respect to a lower horizontal plane on one outer side surface, and an inclined surface 10a substantially symmetrical to the inclined surface 8a on the opposite surface of the inclined surface 8a in the frame main body 8. The inclined surface 10a
A film holding frame for a film forming apparatus, comprising a rotating frame body 10 whose lower end is rotatably supported at a lower end position of an inclined surface 8a of the frame body 8.