JP2521423Y2 - Resin sheet feeder - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] The present invention is to heat a press-moldable resin sheet (stampable sheet) in a heating furnace,
The present invention relates to a device for feeding onto a lower mold of a molding press.

[0002]

2. Description of the Related Art Stampable sheets are laminated sheets in which a thermoplastic resin (generally polypropylene) is used as a base matrix and is reinforced with a long glass fiber mat or the like. This stampable sheet should be placed in an infrared heating furnace before molding.
It is heated to 0 to 220 ° C, softened, and then fed into the press for bending and drawing. Since the sheet is softened in this way, a loader of the type that holds a few points with a vacuum cup or the like cannot be used as in the case of a metal sheet material.

Conventionally, a small size stampable sheet (for example, 1000 mm × 1000 mm, weight of about 5 kg or less) is manually conveyed to a press or supplied by a supply device (conventional device I) as shown in FIG. ing. This conventional device I
Is a pair of comb-shaped pallets 101,10 that can be opened and closed in the front-rear direction.
The sheet S is placed on the sheet 2, and the sheet S is placed on the lower die after the pallets 101 and 102 are opened (arrow A) after being carried in above the lower die of the press. Pallet 101,
The lifting frame 103 is held by a lifting frame 103, and the lifting frame 103 is attached to the front end of a carriage 104 that can move forward and backward. The comb-shaped pallet that can be opened and closed freely
Instead of 101 and 102, a feeding device (conventional device II) having a piercing piece for piercing the sheet S and holding the sheet and a frame for holding the sheet when the piercing piece is removed from the sheet is also used. ing.

[0004]

When a sheet is conveyed by hand, the work environment is poor because the sheet is hot, and large size (weight of about 5 kg or more) cannot be handled at all.

On the other hand, the conventional feeder I using the comb-shaped pallet that can be opened and closed requires a space twice as large as the sheet S in order to secure the opening and closing strokes of the pallets 101 and 103. Therefore, there is a problem that it is difficult to support a large size stampable sheet. Further, the conventional device II, which feeds a piercing piece into a sheet, has a problem that a piercing scratch remains on a molded product. Further, in any of the above conventional apparatuses, since the softened sheet is partially supported, it may be deformed before being placed on the press die, and the deformation may adversely affect the press working.

In view of such circumstances, the present invention solves the problems of the conventional device and provides a resin sheet supply device capable of supplying a stampable sheet or the like of a large size into a press die without deformation. The purpose is to

[0007]

[MEANS FOR SOLVING THE PROBLEMS] The resin sheet feeding device of the present invention is configured so that (A) it can be moved forward and backward toward the molding press, and the resin sheet is placed and supported on the resin sheet between the upper and lower molds in the press. A table having a flat surface that can enter into (1) and (B) a clamper for holding the tip of the resin sheet so that the resin sheet remains on the lower mold when the table leaves the press. It is a structural feature that it comprises a resin sheet supply device.

According to another aspect of the present invention, there is provided a resin sheet feeding device which further holds the clamper such that the clamper can be moved into and out of the press, and when the table is moved into the press, the clamper is moved into the press. Is equipped with a clamper carriage for retracting the clamper from the press after leaving the press. In the resin sheet feeding device according to claim 3, the clamp carriage has a position of a take-out conveyor of a heating furnace that heats the resin sheet, and a position where the clamp carriage enters the press and passes through a die of the press. It is characterized in that it has a stroke for reciprocating between them, whereby the clamper also functions as a mechanism for pulling out a sheet from the conveyor onto the table.

[0009]

In the apparatus of the present invention, the resin sheet is placed on the flat table and carried into the press, and the table is withdrawn while the clamper holds the leading end of the carried resin sheet. Therefore, the resin sheet is smoothly transferred from the flat table onto the lower mold. Therefore, the softened resin sheet is always supported entirely from below on the table, so that irregular deformation does not occur before processing.
Further, since it is not necessary to provide an opening / closing mechanism or the like on the table itself, the structure is simple and the installation space is small.

The apparatus of claim 2 has the advantage that the clamper can be retracted before the ram of the press descends, so there is no need to pay attention to the engagement between the clamper and the upper mold, and the design is easy. . Further, there is an advantage that the resin sheet can be firmly gripped at a position close to the lower mold. In the apparatus according to the third aspect, first, the clamper carriage is most retracted to grip the tip of the softened resin sheet on the takeout conveyor.
Then, the clamper carriage moves forward and drags the resin sheet onto the table. From that state, the clamper carriage and the table go into the press die in synchronization with each other,
Only the table retreats. As a result, the resin sheet is left on the lower mold, the clamper releases the resin sheet, and the clamper carriage retreats out of the press. Therefore, the clamper and the clamper carriage serve not only as a supply device for the press but also as a removal device for the heating furnace.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a resin sheet feeding device 1 (hereinafter referred to as feeding device 1) according to the present invention, and FIGS. 2, 3 and 4 are plan views, front views and side views, respectively. Is. In FIG. 1, P is a press for forming the sheet S, and the lower die D is set on the bolster Bo of the press P. H is a pallet conveyor of the heating furnace. In FIG. 1, the pallet conveyor H is shown only at the take-out position. The feeding device 1 of the present invention is installed between the press P and the heating furnace, and conveys the softened sheet S from the pallet conveyor H of the heating furnace to the lower mold D. It comprises a moving table 2 and a clamper 3.

First, the guide relationship and drive relationship of the table 2 will be described. As shown in FIGS. 2 and 3, table rails 5 are attached to the left and right sides of the base 4 supporting the entire apparatus via brackets 41 in the front-rear direction. Further, a rodless cylinder 6 is attached to the center of the base 4 in the front-rear direction via a bracket 42. The left and right edges (both ends in the width direction) of the table rail 5 have a V-shaped projection as shown in FIG.

As shown in FIG.
The pair of two V-groove rollers 7 shown in (1) are attached as follows. That is, the pair of V-groove rollers 7 is the table 2
Mounted on the left and right of the table 2 toward the rear by the stroke S1 of the table 2 and on the left and right of the rear end of the table 2, and each pair of V-groove rollers 7 mounts the respective table rails 5 from the left and right. It is sandwiched and rotatably provided. With this configuration, the table 2 is guided and supported by sandwiching the table rail 5 between the front and rear V-groove rollers 7 even when the table 2 is overhung as shown in FIG. Further, a fixture 9 shown in FIG. 5 is provided at the center of the lower surface on the rear side of the table 2, and the rodless cylinder 6 is attached to the fixture 9.
The driving member 10 is attached. When the rodless cylinder 6 is moved forward and backward, the table 2 is driven to reciprocate by the stroke S1 shown in FIG.

Next, the guide / drive mechanism of the clamper 3 will be described. As shown in FIGS. 2 to 4, along the left and right edges of the base 4 up to the bolster Bo of the press P (see FIG. 1), a square pipe clamper rail 12 is provided via a U-shaped bracket 11. Is attached in the front-rear direction of the feeding device 1, and the clamper rail 12 is attached at an angle of 45 ° around its own axis so that the corners are vertically arranged.
And, on the left and right clamper rails 12, the table 2
Further, a gate-shaped clamper carriage 13 is placed so as to straddle the lower die (D in FIG. 1) of the press. As shown in FIG. 7, an inverted L-shaped bracket 15 is provided below the leg portion 14 of the clamper carriage 13.
A pair of V groove rollers 16 and 17 are rotatably attached to the clamp rail 12 so as to sandwich the clamper rail 12 from above and below.

A traveling motor M1 is provided above the leg portion 14 of the clamper carriage 13, and a traveling pinion 19 is fixed to an end portion of a rotary shaft 18 of the traveling motor M1. On the other hand, a bracket having a U shape along the clamper rail 12
The rack 20 attached to 11 extends and the rack 20
And the traveling pinion 19 mesh with each other. Therefore, the forward / reverse rotation of the traveling motor M1 allows the clamper carriage 13 to reciprocate by the stroke S2 shown in FIG. 4 while being guided by the clamper rail 12.

Further, as shown in FIG. 10, two shafts 22 and 23 for opening and closing the clamper 3 pass through the lower surface of the lateral beam 21 of the clamper carriage 13, and each of them has a bearing.
It is rotatably suspended at 24 (see Fig. 7). As shown in FIG. 9, two gears 25 and 26 having different pitch circle diameters are attached near the shaft ends of the two shafts 22 and 23, and both gears mesh with each other. The pitch circle diameter of the gear 25 of the shaft 22 on the rear side in the traveling direction is larger than that of the gear 26 on the front side. Further, a drive shaft 27 of a clamper opening / closing motor M2 is connected to the shaft end of the rear side shaft 22. Then, as shown in FIGS. 7 to 8, a large number of upper clamp pieces 28 are fixed to the rear shaft 22 in a rearward direction at intervals with each other,
A lower clamp piece 29 is fixed rearward to the front shaft 23. Therefore, the upper and lower clamp pieces 28 and 29 are simultaneously opened and closed by the forward and reverse rotation of the clamper opening / closing motor M2. In that case, due to the difference in the pitch circle diameters of the gears 25 and 26, as shown in FIG. 10, the clamp piece 2 below the rotation angle θ1 of the rear shaft 22 that drives the upper clamp piece 28 is used.
The rotation angle θ 2 of the front shaft 23 that drives 9 becomes larger. As a result, when the clamp pieces 28, 29 are closed, the clamp pieces 28, 29 can be closed rearward by grasping the horizontal plane, and when the clamp pieces 28, 29 are opened, the rear and lower portions can be sufficiently opened. Therefore, when the sheet S is placed on the lower die D and the clamp pieces 28, 29 are retracted rearward, the necessary minimum opening that does not contact the softened resin sheet S is possible.

Next, referring to FIGS.
The whole movement will be explained. Incidentally, K in FIG. 11 is a heating furnace. When the resin sheet (not softened) S is placed on the pallet conveyor H from the stack, the softened resin sheet S passes through the heating furnace K and comes out to the take-out position. That is, the front end and the rear end of each pallet T are connected to the chains 31 and 32 of different rectangular loops, respectively, so that the cycle of forward-downward-backward-upward is repeated while maintaining the parallel state as the chains circulate. It has become. In this embodiment, the movement of the pallet conveyor H is utilized to smoothly transfer the sheet S from the pallet to the table 2. In order to make it easier for the clamper 3 to pinch the sheet S, the sheet S is placed slightly protruding from the front end of the pallet T of the pallet conveyor H, or the pallet is placed so that the clamper 3 does not hinder the pinching of the sheet S. It is preferable to form a notch in T.

As shown in FIG. 12, when the pallet T reaches the forward end, the clamper 3 closes and holds the leading edge of the sheet S (first step I). Then, as shown in FIG. 13, when the pallet T descends and its lower surface becomes almost the same height as the table 2, the clamper carriage 13 advances to move the clamper 3 in the direction of arrow A1 (second step). II). When the clamper 3 approaches the front of the press P, the table 2 moves in the same direction (arrow A2) (second step I).
I). Therefore, until the middle of the forward movement of the clamper 3, the sheet S is moved so as to be dragged from the pallet T onto the table 2. At this time, since the pallet T and the table 2 are at the same height as described above, they can be moved smoothly. Further, since the clamper 3 is above the table 2, the drag operation can be performed smoothly. Such a difference in height between the clamper 3 and the table 2 makes good use of the downward movement of the pallet T.

In the latter half movement of the clamper carriage 13,
Move forward almost with Table 2. Thereby, the softened sheet S can be conveyed without being distorted. At this time, even if the forward speed of the table 2 lags behind the clamper carriage 13, the sheet S simply slides on the table 2, and there is no particular problem. However, if the table 2 is faster than the clamper carriage, the sheet S will sag, which is not preferable.

At the end of the second step, the clamper 3 has passed through the press P to the opposite side, and the table 2 is in a state of being covered on the lower mold D. Then, with the sheet S held by the clamper 3, only the table 2 moves backward (arrow B1 in the third step III). As a result, the sheet S is pulled down from the table 2 onto the lower die D. Further, the clamper 3 releases the sheet S and retracts (arrows B2, B in the third step III).
3).

Finally, after confirming that the clamper 3 and the table 2 are retracted, the ram of the press P descends,
The sheet S is sandwiched between the upper die and the lower die D for a certain period of time and pressure-molded. The formed sheet S is no longer flexible and can be discharged, for example, by means of a conventional unloader or a suitable popping device. Even when the sheet S is supplied to the heating furnace, the sheet S is not softened.
It can be placed on the pallet conveyor H with a loader or the like. Even if it is carried by hand, the temperature is low and it is not softened, so it is easy to carry.

Next, another embodiment of the present invention will be described. In the above-mentioned embodiment, the rodless cylinder 6 is used to drive the table 2, and the forward and backward movement of the clamper carriage and the gripping / releasing of the clamper 3 are driven by the motors M1 and M2. The drive mechanism is not limited to the above, and any drive mechanism such as a chain type or a combination of a cylinder and a link can be adopted. The clamper 3 is not only mechanically gripped, but also a vacuum cup, an electromagnet,
Any puncture needle or the like can be used as long as it can hold only the sheet S when the table 2 retracts.

Further, the material and shape of the table in the device of the present invention are not particularly limited, but the one having a smooth upper surface is preferable because the sheet S slides on the upper surface thereof. Further, since the sheet S is almost entirely in contact with the table, it is preferable that the material of the table has a high heat insulating property and a low heat transfer action so that the table does not take heat from the sheet S. For example, it is preferable to use a panel covered with a cloth through a wood panel, or a foam panel formed of a heat-resistant synthetic resin. In each of the above-mentioned embodiments, the case where the clamper carriage is provided is shown. However, the transfer from the heating furnace to the table is carried out by a separate means, and the clamper itself is always kept on standby on the opposite side of the press. You may In that case, the clamper may be provided with a lifting function. Alternatively, the clamper may be used as a discharge loader. In such a case, the clamper may be configured to escape (to the left in the case of FIG. 11) when the press ram is processed.

[0024]

The resin sheet feeding device of the present invention can efficiently feed a softened sheet, especially a large sheet, to a press without distorting it.

[Brief description of drawings]

FIG. 1 is a perspective view showing a material supply device according to an embodiment of the present invention.

2 is a plan view of the device of FIG. 1. FIG.

FIG. 3 is a front view of the device of FIG.

4 is a side view of the device of FIG. 1. FIG.

5 is a side view showing a table drive section in the apparatus of FIG. 1. FIG.

FIG. 6 is an enlarged front view of the table rail.

FIG. 7 is an enlarged front view of a main part of the clamper carriage.

FIG. 8 is an enlarged side view of the clamper carriage.

FIG. 9 is an enlarged cross-sectional view of a main part of the clamper carriage.

FIG. 10 is an enlarged side view of the clamper portion.

FIG. 11 is an elevational view showing an embodiment of a press molding line using the resin sheet supply device of the present invention.

12 is an explanatory diagram of a first step I in the molding line of FIG.

13 is an explanatory diagram of a second step II and a third step III in the molding line of FIG.

FIG. 14 is a perspective view showing a resin sheet supply device of a conventional device I.

[Explanation of symbols]

1 resin sheet feeder 2 table
3 Clamper 5 Table rail 6 Rodless cylinder
7 V-groove roller 12 Clamper rail 13 Clamper carriage
16 V-groove roller 17 V-groove roller 19 Pinion
20 racks 22 axes 23 axes
28 Clamp piece 29 Clamp piece S Resin sheet
P press

Claims (3)

(57) [Scope of utility model registration request] 1. A device for feeding a heat-softened resin sheet to a molding press, comprising: (A) a structure capable of moving forward and backward toward the molding press, with the resin sheet mounted and supported thereon A table with a flat surface that can enter between the upper and lower dies, and (B) a clamper for holding the tip of the resin sheet so that the resin sheet remains on the lower die when the table exits from the press. A resin sheet feeding device comprising: 2. The clamper is held so that it can be moved into and out of the press, the clamper is moved into the press when the table enters the press, and the clamper is pressed after the table exits the press. The resin sheet feeding device according to claim 1, further comprising a clamper carriage for retracting the resin sheet from the resin sheet feeding device. 3. The clamper carriage reciprocates the clamper between a position of a take-out conveyor of a heating furnace for heating a resin sheet and a position where the clamper carriage enters a press and passes through a press die. 3. The resin sheet feeding device according to claim 2, wherein the resin sheet feeding device has a stroke so that the clamper also serves as a mechanism for pulling a sheet out of a conveyor onto a table.