JPH0566251B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a resin sheet material molding apparatus for compartmentally housing products that are stacked and stacked in a box such as a container.

[Prior art] As shown in Utility Model Application Publication No. 50-67171, a molding device for resin sheet material is used, for example, as shown in Japanese Utility Model Application Publication No. 50-67171.
A female mold 5 is fixed to the lower surface of the inner lid 3 so that the opening 4 of the inner lid 3 is exposed, and a ventilation hole 6 communicating with the case 2 is formed in the female mold 5. A presser plate 8 having an opening 7 that overlaps with the opening 4 is placed on the inner lid 3, and a lid 10 with a built-in heating element 9 is placed on the presser plate 8. A heat reflecting plate 22 which also serves as a heat shield is provided on the back side of the circumferential surface.

[Problems to be Solved by the Invention] In the conventional molding apparatus described above, the female mold is fixedly attached to the box, so the operator manually removes the female mold from the mold after molding. The molded product must be peeled off and taken out, which poses a problem in that the molding operation efficiency is low and it is time-consuming.

[Object of the Invention] The present invention was invented in order to solve the above-mentioned conventional drawbacks, and its purpose is to form a resin sheet material into a desired shape with a substantially uniform thickness. Another object of the present invention is to provide a molding apparatus for a resin sheet material that allows the molded product to be easily taken out after molding and that can perform molding operations efficiently.

[Means for Solving the Problems] Therefore, the present invention provides a box body in which a fixing member for fixing a resin sheet material is attached to the side edge of the top opening, and a top opening in the upper part of the box body. A heating member that heats a resin sheet material that is movably supported between a covering position and a separated position and that is fixed to the side edge of the upper opening of the box body, and a heating member that slides in the vertical direction within the box body. a mold mounting plate in which a large number of through holes are formed; a vertically operating member that moves the mold mounting plate up and down between the bottom side and the top opening side of the box body within the box body; A suction device is connected to the bottom of the box and forms a negative pressure in the space between the box and the mold mounting plate; The lower part of the box body, where the mold mounting plate is moved upwards while the resin sheet material attached to cover the top opening of the box body is heated and softened by a heating member. The method is characterized in that a negative pressure is created in the upper space of the box while creating a negative pressure in the space, and the softened resin sheet material is attached to each mold of the mold member to be molded into a desired shape.

[Operation of the invention] Since the present invention is configured as described above, the resin sheet material is fixed to the upper opening side edge of the box body by the fixing member, and the actuating member is actuated to move the mold member above the box body. let In this state, the heating member moved above the box softens the resin sheet material to the extent that it does not melt, and the suction device creates a negative pressure inside the box, and the softened resin sheet material is applied to each mold of the mold member. The material is attached to the material and molded into the desired shape. At this time, a suction device connected to the box first forms a negative pressure between the bottom of the box and the mold mounting plate, and then the mold member and the resin sheet material are removed through the through holes of the mounting plate and the mold member. Since a negative pressure is created inside the box between the parts, the suction force of the softened resin sheet material can be made uniform, and the thickness of the molded product can be made uniform.

After the above molding operation, when the mold mounting plate is moved to the lower part of the box body by the actuating member that moves back, the molded product is automatically released from the mold member.

[Example] An example of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows a molding apparatus for resin sheet material;
In FIG. 2, which shows a longitudinal section taken along the line A--A in FIG. 1, a pair of left and right support rails 5 shown in FIG. 1 are attached to the upper part of the main body frame 3 of the resin sheet molding apparatus 1. A pedestal 7 is supported on the support rail 5 so as to be movable in the direction of the solid arrow shown in FIG. A stay 8 extending over the upper left side of the main body frame 3 is attached to the left side surface of the pedestal 7 shown in FIG. 1, and a rack gear 9 is fixed to the stay 8.
An electric motor 11 fixed to the main body frame 3 is connected to the rack gear 9 via a pinion gear 13. As a result, the pedestal 7 is moved in the direction of the solid line arrow and in the direction of the broken line arrow shown in FIG. 1 as the electric motor 11 is driven forward and backward.

A far-infrared ray heater device 15 constituting a heating member is attached to the lower surface of the pedestal 7. The heater device 15 heats a resin sheet material 29, which will be described later, for a required time when the pedestal 7 is moved to the position shown in FIG.

A suction box 17 as a box is disposed within the main body frame 3 below the heater device 15. The suction box 17 has an open top surface;
and the lower surface is occluded. and the suction box 1
A suction device 19 constituting a suction means is connected to the lower part of the box 7, and as the suction device 19 is driven, the air in the suction box 17 is discharged. Further, a swinging lever 23 is rotatably supported on the upper end flange 17a of the suction box 17.
A presser piece 25 is integrally formed on the free end of. The swing lever 23 is always urged upward by the elastic force of a helical spring (not shown).
Further, a hook (not shown) is integrally formed on the free end of the swing lever 23, and the hook (not shown) is used when the swing lever 23 is rotated against the elastic force of the helical spring. When the upper end flange 1
7a and the upper end flange 17a, which will be described later.
Resin sheet material 29 located between and presser piece 25
is held fixed.

A support frame 31 serving as a mold mounting plate is disposed within the suction box 17. The support frame 31
An air cylinder 32 as an operating member is connected to the suction box 17, and moves up and down within the suction box 17 as the air cylinder 32 is operated. A large number of through holes 31a are formed in the support frame 31. A mold 33 constituting a mold member is attached to the upper surface of the support frame 31. The mold 33 is integrally formed with a recess 33a that accommodates products of the resin sheet material 29, which will be described later, and a protrusion 33b that serves as a partition plate between each product. A large number of through holes 33c are formed.

Next, the operation of the embodiment configured as described above will be explained with reference to FIGS. 3 to 6.

FIG. 3 shows the attachment state of the resin sheet material 29 to the suction box 17, FIG. 4 shows the molded state of the resin sheet material 29, FIG. 5 shows the released state, and FIG. 6 shows the molded resin sheet material 29. In the figure, a resin sheet material 29 is provided on the upper surface of the upper end flange 17a.
After arranging the four circumferential parts of the suction box 17, when the swing lever 23 is rotated against the elastic force of the helical spring, the resin sheet material 29 is fixed to the suction box 17 so as to close the upper opening thereof. .

When a start switch (not shown) is turned on in the above state, the pedestal 7 moves the heater device 15 above the resin sheet material 29 as the electric motor 11 is driven. The heater device 15 then heats the resin sheet material 29 for a required time to soften it. The above-mentioned required time is set to a time sufficient for the resin sheet material 29 to not melt and become soft. The resin sheet material 29 softened by heating by the heater device 15 is sucked into the suction box 17 while being stretched throughout as the suction device 19 is driven to suck. As a result, the softened resin sheet material 29 is brought into pressure contact with the mold 33, and the resin sheet material 29 is brought into contact with the concave portions 33a and convex portions 3 of the mold 33.
3b is formed into a required uneven shape. (See FIG. 5) After the required time has elapsed, the pedestal 7 is moved to its original position as the electric motor 11 is driven in reverse. In this state, the support frame 31 and the mold 33 are moved downward by the operation of the air cylinder 32, and the resin sheet material 29 is released from the mold 33. Next, the resin sheet material 2 for the upper end flange 17a
9 is released from the fixed state, and the resin sheet material 29 is removed from inside the suction box 17.

The resin sheet material formed in this way is cut as necessary to form a resin sheet material 29 shown in FIG.
is formed.

After the resin sheet material 29 is accommodated in a container (not shown), products are accommodated in each recess 29a of the resin sheet material 29, respectively. As a result, the convex portions 29b located between the respective concave portions 29a are used as partition plates and step plates for partitioning the products.

In this way, this embodiment has a concave portion 29a for accommodating a product by suctioning the softened resin sheet material 29 and pressing it against the mold 33, and a convex portion 29b constituting a partition plate and a step plate. The resin sheet material 29 can be formed into a resin sheet material 29 with
can be formed efficiently and at low cost.

[Effects of the Invention] As described above, the present invention makes it possible to mold a resin sheet material into a desired shape with a substantially uniform thickness, and also allows the molded product to be easily taken out after molding, making the molding work more efficient. It is possible to provide an apparatus for molding a resin sheet material, which can perform the molding process and save labor.

[Brief explanation of the drawing]

Fig. 1 is a perspective view schematically showing a molding device for resin sheet material, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is an attachment of the resin sheet material to a suction box. 4 is a sectional view showing the molded state of the resin sheet material, FIG. 5 is a sectional view showing the released state of the resin sheet material, and FIG. 6 is a perspective view showing the molded resin sheet material. It is a diagram. In the figure, 15 is a heater device constituting a heating member;
7 is a suction box as a box, 19 is a suction device, 29 is a resin sheet material, and 33 is a mold forming a mold member.

Claims (1)

[Scope of Claims] 1. A box body having a fixing member for fixing a resin sheet material attached to the side edge of the top opening, and a position at the top of the box body between a position covering the top opening and a position away from the top opening. a heating member that heats a resin sheet material that is movably supported in the box body and fixed to the side edge of the upper opening of the box body; a mold mounting plate formed with a mold mounting plate; a vertical operating member that moves the mold mounting plate up and down between the bottom side of the box body and the top opening side within the box body; a suction device that forms a negative pressure in the space between the mold mounting plate and the mold mounting plate in the box body; a mold member that is attached to the upper surface of the mold mounting plate and has a plurality of molds and has a large number of through holes formed therein; The resin sheet material attached to cover the top opening of the box is heated by a heating member to soften it, and the mold mounting plate moves upward to form a negative pressure in the lower space of the box. A molding apparatus for a resin sheet material, characterized in that the resin sheet material softened by forming a negative pressure in the upper space of the body is attached to each mold of a mold member and molded into a desired shape.