JPH07342B2 - Thermoforming machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoforming machine for a continuous resin sheet, in which heat shield plates for sandwiching the resin sheet are provided above and below the boundary between the heating zone and the molding zone.
The upper and lower heat blocking plates are composed of a vertical motion blocking plate that only moves up and down, and swingable rocking blocking plates on both sides of the vertical motion blocking plate. The swing blocking plate is configured to swing to a position sandwiching the resin sheet.

[0002]

2. Description of the Related Art In Japanese Utility Model Publication No. 62-26179, in order to prevent the heat of the heating zone of a continuous resin sheet from affecting the molding zone as much as possible, it is heated above and below the boundary between the heating zone and the molding zone. There is disclosed a configuration of a heat shield device which sandwiches the resin sheet and blocks heat from entering the molding zone. According to this structure, the center between the edges of both sides of the resin sheet is a fixed dividing plate on the upper and lower sides, and the left and right sides are movable dividing plates. The clamp chains, which sandwich the edge edges on both sides of the resin sheet, and the guide rails that guide and support the traveling of the chains are arranged on the left and right outer sides of each movable split plate. However, the guide rail is limited in length and is sturdy, and it is necessary to adjust the width of the clamp chain according to the width of the resin sheet, which makes the structure for performing the movement adjustment complicated in the known device. , Feel inconvenience.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides an apparatus in which the heat shield plate is adapted to the movement adjustment of the guide rail and the heat shield plate is easily automatically adjusted corresponding to the width of the resin sheet. It is an object of the invention to provide a thermoforming machine equipped with the thermoforming machine.

[0004]

The thermoforming machine according to the present invention meets the above-mentioned object, and includes a lower or upper heat shield plate and a vertical motion shield plate at a central portion in the width direction and a width of a continuous sheet. Adjusting the spacing according to changes Left and right with each outer end swingably connected to the connecting shaft provided on each guide rail of the left and right clamp chains, and the pin at the inner end formed on the vertical motion blocking plate A pair of swing blocking plates that are slidably fitted in the guide long holes in the direction, and a vertical movement member is connected to the vertical movement blocking plate. Then, each swing blocking plate is swung to a position sandwiching the resin sheet.

[0005]

The vertical moving member 1 of the lower heat shield plate 17 of the lower or upper heat shield device 6 installed in the thermoforming machine of the present invention.
By the upward movement and the downward movement of the telescopic rod 20 of 9, the operation of heat cut off on the thermoforming zone II of the heating zone I is performed.

This is as described in the operation of the lower heat shield plate 17 of the embodiment of FIGS. Even when the upper and lower heat shield plates 11a and 17a are formed as in the embodiment of FIG.
This is the same as the lower heat shield plate 17 shown in FIGS.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The accompanying drawings illustrate an embodiment of the present invention, in which FIGS.
FIG. 1 is a front view and FIG. 2 is an enlarged front view of the same portion, showing an operating state of heat blocking, which is an embodiment in which the present invention is applied to a lower heat blocking plate. 2 is a vertical sectional side view of FIG. 2A-A line, FIG. 4 is a partially enlarged perspective view of the upper heat shield plate, and FIG. 5 is a partially enlarged perspective view of the lower heat shield plate. FIG. 6 shows an embodiment in which the present invention is applied to upper and lower heat shield plates.

1 to 5, a machine frame 1 of a thermoforming machine comprises a plurality of vertical frames 2 on the left and right, an upper connecting frame 3 and a lower connecting frame 4 for connecting the upper and lower parts of these vertical frames, and Each vertical frame 2, 2
And a horizontal frame 5 for connecting them in the length direction of the thermoforming machine. As shown in FIG. 3, the thermoforming machine has a heating zone equipped with a heater.
I and a molding zone II formed by a mold are connected to each other, and heat is blocked by sandwiching a continuous resin sheet C between the zones I and II to block heat or to release the sheet to move the sheet C. A device 6 is provided. In addition, guide rails 8 and 8 of a pair of left and right clamp chains 7 and 7 that clamp the edges of both sides of the continuous sheet C and run intermittently are arranged.
The guide rails 8 and 8 are moved by a device (not shown) to change the corresponding widths of the clamp chains 7 and 7 each time the width of the resin sheet to be molded is different.

As shown in FIGS. 1 and 2, the heat shield device 6 comprises an upper heat shield plate 11 and a lower heat shield plate 17, and the upper heat shield plate 11 is a fixed shield plate 12 in the widthwise center of the resin sheet C.
And a pair of adjustable blocking plates 15 and 15 on the left and right sides. The fixed blocking plate 12 has its upper end fixed to one of the upper connecting frames 3 of the machine frame 1 and is hung, and the left and right elongated holes 13 in the left and right direction. 1
3 is provided, and a sandwiching plate 14 that is in contact with the central upper surface of the width of the upper surface of the resin sheet C is attached to the lower ends of the lower left and right cutouts. The adjustable blocking plates 15, 15 are arranged on the rear surface of the fixed blocking plate 12, the lower edge is aligned with the lower edge of the sandwiching plate 14 in the horizontal direction, and each outer end is fixed to the upper piece of the guide rails 8, 8. ,
The pins 16 and 16 at the inner ends are slidably passed through the back surfaces of the slots 13 and 13. (See Figure 4)

The lower heat shield plate 17 is composed of a vertical motion shield plate 18 in the central portion in the width direction and a pair of left and right swing shield plates 23, 23. The lower end of the vertical motion shield plate 18 is connected to one of the lower connecting frames. 4 is connected to a telescopic rod 20 of a vertically moving member 19 such as a cylinder. In addition, to the left and right above
1, 21 are provided, the upper left and right are cut out, and the sandwiching plate 22 corresponding to the center lower surface in the width direction of the resin sheet C is provided at the upper end.
Install. The swing blocking plates 23, 23 are the vertical motion blocking plates 18.
When the vertical movement blocking plate 18 is lifted by the telescopic rod 20 of the vertical moving member 19, the upper edge is aligned with the upper edge of the sandwiching plate 22 as shown in FIG. The protruding pieces 23 'and 23' are swingably connected to the shafts 24 and 24 of the lower pieces of the guide rails 8 and 8, and the pins 25 and 25 at the inner ends are slid from the rear surfaces of the slots 21 and 21. Pass it freely. (See Figure 5)

In this embodiment, the upper heat shield plate 11 is made immovable, and when the resin sheet C is intermittently fed,
The heat shield plate 1 below the telescopic rod 20 of the vertically moving member 19
As shown in FIG. 1, the vertical movement shutoff plate 18 of FIG.
2 below the sandwich plate 14 of the upper heat shield plate 11,
The movement blocking plates 23, 23 use the pins 25, 25 as the long holes 21, 2,
1, it is slid outward in the left-right direction, and swings about the shafts 24, 24 so that the upper edge is inclined as shown in FIG. Although FIG. 1 illustrates the case where the width of the guide rails 8, 8 is wide and the resin sheet C having a large width is used, the guide rails 8, 8 are used because the resin sheet C having a small width is used.
Even if the space between is narrowed as shown by the arrow, the pins 25, 25
The position of is only inward, and there is no other change.

The vertical movement blocking plate 18 of the lower heat blocking plate 17 is raised by the telescopic rod 20 of the vertical moving member 19 to move the sandwiching plate 22 to the lower surface of the sandwiching plate 14 of the upper heat blocking plate 11, as shown in FIG. When the resin sheet C is sandwiched and molding is performed in the molding zone II, the rocking block plates 23, 23 have pins 25, 25.
Slide inward in the left-right direction in the long holes 21, 21,
The upper edge is horizontal with 4, 24 as the center, and the upper heat shield plate 1
The first adjustable blocking plate 15 swings in contact with the lower edge of the adjustable blocking plate 15 to block the heat in the heating zone I from reaching the forming zone II.

FIG. 6 shows that the upper heat shield plate 11a and the lower heat shield plate 17a are moved up and down together with the movement of the resin sheet.
An example is shown in which the sandwiching plates 14a and 22a are joined to the upper and lower surfaces of the resin sheet C at the same time as the movement is completed. As is clear from the drawings, the lower heat of the embodiment of FIGS. The same thing as the blocking plate 17 is provided above and below. Figure 6
Is indicated by adding a sign symbol "a" to the code of the lower heat shield plate 17.

[0013]

INDUSTRIAL APPLICABILITY According to the present invention, a continuous resin sheet is intermittently transferred at a constant length by a clamp chain to sequentially stop the heating zone and the molding zone, and the resin is provided above and below the boundary between the heating zone and the molding zone. In the configuration in which the heat shield plates 11 and 17 (17a) sandwiching the sheet are provided, the vertical motion shield plate 18 is provided at the center of the width direction of both the heat shield plates 11a and 17a or the lower heat shield plate 17 and the width of the continuous sheet is changed. The outer ends are swingably connected to the shafts 24, 24 of the guide rails 8, 7 of the left and right clamp chains 7, 7 for adjusting the intervals, and the pins 25, 25 at the inner ends are used as the vertical movement blocking plate. It is constituted by a pair of swing blocking plates 23, 23 slidably fitted in the formed guide slots 21 in the left-right direction, and the vertical movement blocking plate 18 is provided with the telescopic rod 2 of the vertical moving member 19.
It is a structure that is connected to 0,

Since the movable blocking plates 23, 23 have one ends pivotably connected to the shafts 24, 24 of the guide rails 8, 8 as described above, the guide rails 8, 8 (clamp chains 7, 7) are prevented from moving. Even if the corresponding interval is expanded or contracted, the movable blocking plate 23,
23, the pins 25, 25 are slid together in the long holes 21, 21 to interlock with the expansion and contraction, and the conventional inconvenience can be solved. Descends and guide rails 8, 8
There is no change in the swinging and horizontal angles of the movable blocking plates 23 and 23 even if they are expanded or contracted, and there is an effect that the feeding and molding of the resin sheet C can be smoothly synchronized. (In FIG. 6, the reference symbol a is added to each symbol to replace the symbol.)

[Brief description of drawings]

The attached drawings illustrate one embodiment of the present invention, FIGS. 1 to 5 show an embodiment in which the upper heat shield plate is kept stationary, and the present invention is applied to a lower heat shield plate, and FIG. 6 shows upper and lower heat shield plates. It is an example in which the present invention is applied to a blocking plate.

1] Front view

FIG. 2 is an enlarged front view of the same part, showing an operating state of heat insulation.

FIG. 3 is a vertical sectional side view of FIG. 2A-A line.

FIG. 4 is a partially enlarged perspective view of an upper heat shield plate.

FIG. 5 is a partially enlarged perspective view of a lower heat shield plate.

FIG. 6 is a front view of an embodiment in which the present invention is applied to upper and lower heat shield plates.

[Explanation of symbols]

C resin sheet, 1 machine frame, 2 vertical frame, 3 upper connecting frame, 4 lower connecting piece, 5 horizontal frame, 6 heat insulating device, 7 clamp chain, 8 guide rail, 11
Upper heat shield plate, 12 fixed shield plate, 13 long hole,
14 sandwich plate, 15 adjustable blocking plate, 16 pin,
17 Lower heat shield plate, 18 Vertical motion shield plate, 19
Vertical movement member, 20 telescopic rods, 21 guide elongated holes,
22 sandwiching plate, 23 rocking blocking plate, 23 ', 23'
One piece, 24 axes, 25 pins

Claims (1)

[Claims] 1. A continuous resin sheet is intermittently transferred at a constant length by a clamp chain to sequentially stop at a heating zone and a molding zone, and the resin sheet is sandwiched above and below a boundary between the heating zone and the molding zone. In the case where a heat shield plate is provided, the upper and lower heat shield plates are the vertical motion shield plate in the center of the width direction and the shafts provided on the guide rails of the left and right clamp chains that adjust the spacing according to the change in the width of the continuous sheet. The outer end is swingably connected, and the pin at the inner end is constituted by a pair of swing blocking plates that are slidably fitted in the horizontal guide slots formed in the vertical motion blocking plate, The vertical movement blocking plate is connected to the telescopic rod of the vertical movement member, and each rocking blocking plate is rocked to a position sandwiching the resin sheet in association with the movement of the vertical movement blocking plate by the member. Thermoforming machine.