JP2503150B2 - Device for automatically rolling molten resin sheets - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically rolling a molten resin sheet material around a cooling drum and a roll group provided on the downstream side of the cooling drum.

[0002]

2. Description of the Related Art Conventionally, the work of winding a molten resin sheet material extruded from an extruder die around a cooling drum and a group of rolls is all done manually.

[0003]

However, the manual work as described above is dangerous because the molten resin sheet material extruded from the extruder die is at a high temperature.
Since the sheet-like material is wound around a large-diameter cooling drum and a roll group arranged in a zigzag pattern on the downstream side of the cooling drum during the operation of the apparatus, at least a few people need to be involved in this work. . In addition, there are problems such as an increase in restrictions in designing the device, such as arranging the rolls in consideration of manual work and considering the structure of the frame.

In view of this, an object of the present invention is to provide an automatic rolling device which can wind a molten resin sheet material around a cooling drum and a roll group without requiring manual work.

[0005]

In order to achieve the above-mentioned object, in the present invention, a driving roll is provided for a molten resin sheet extruded from an extruder die toward the peripheral surface of a cooling drum. A nip roll device that rotates at the same speed as the object and moves to the free roll side to sandwich the sheet-like object, and a predetermined position of the sheet-like object sandwiched by the nip roll device that is provided on the downstream side of the nip roll device. A cutter device for cutting in the width direction, sprockets provided outside both ends of the cooling drum and a roll group provided on the downstream side of the cooling drum, an endless transmission member wound around the sprockets, The carrier tape wound around the outer peripheral surface of the adhesive tape hung on the endless transmission member is urged in a direction opposite to the rotation direction of the carrier bar. The bar has an adhesive nip roll for adhering the sheet-like material to the adhesive tape, and the tip of the sheet-like object after being cut at the predetermined position is pulled to the cooling drum and a roll group provided on the downstream side of the cooling drum. An automatic roll-applying device for a molten resin sheet material, comprising a wound carrier device, and the endless transmission member has a tension adjusting device. The apparatus for automatically rolling the molten resin sheet material according to claim 1 is defined as claim 2.

[0006]

In the above apparatus, the molten resin sheet-like material extruded from the extruder die toward the peripheral surface of the cooling drum is nipped by the nip roll device, and a predetermined position of the sheet-like material is moved in the width direction by the cutter device. Disconnect. After a while
The carrier bar constituting the carrier device is adhered to the leading end of the sheet-like material after being cut at a predetermined position. Then, the tip end of the sheet-like material is brought into contact with the adhesive nip roll provided on the upstream side of the roll group by the movement of the carrier bar by the chain wound around the cooling drum and the sprockets provided outside the both ends of the roll group. Contact with each other and securely adhere the sheet-like material to the carrier bar. Then, by moving the carrier bar, the sheet material is automatically pulled and wound around the cooling drum and the roll group.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS.

The automatic roll-applying device 1 includes a nip roll device 5 for sandwiching a molten resin sheet material (hereinafter, referred to as a sheet material) 4 extruded from an extruder die 2 toward a peripheral surface of a cooling drum 3, and a nip roll device 5. A cutter device 6 which is provided on the downstream side of the nip roll device 5 and cuts a predetermined position of the sheet-like material 4 sandwiched by the nip roll device 5 in the width direction, and a tip of the sheet-like material 4 after being cut at the predetermined position is cooled. The drum 3 and the carrier device 8 having an endless transmission member for pulling and winding the roll group 7 provided on the downstream side of the cooling drum 3 are provided.

As shown in FIG. 2, the nip roll device 5 has a drive roll 9 and a free roll 10, and is provided near one end of the side surface of the cooling drum 3. The drive roll 9 is made of iron material or the like, and the drive motor 1 is used.
1, the motor 11 is mounted on a pedestal 12. The free roll 10 is made of a rubber material or the like and has a plurality of grooved grooves 13 formed in the circumferential direction on the peripheral surface thereof. And the pedestal 12 of the drive roll 9 is the rail 12a.
The upper part is movable, and is located apart from the sheet-like object 4 as shown in FIGS. 2 and 5d before the sheet-like object 4 is sandwiched. 1
2 is moved on the rail 12a in a direction indicated by an arrow D in FIG. 2 by a driving means (for example, a motor) not shown. The free roll 10 has its shaft 10a.
2 is used as a fulcrum, and before the sheet-shaped material 4 is sandwiched, the free roll 10 is outside the sheet-shaped material 4 and the axis of the free roll 10 is before the sheet-shaped material 4 is sandwiched, as shown in FIGS. 2 and 5d. It is parallel to the pulling direction of the sheet-like material 4. And
When the sheet-like material 4 is clamped, the sheet-like material 4 is clamped together with the drive roll 9 as shown in FIG. 3 by rotating the sheet-like material 4 in the direction indicated by the arrow E in FIG. Has become. Further, the drive roll 9 of the nip roll device 5 is controlled so as to rotate at the same speed as the speed of the sheet-like material 4 in order to reliably sandwich the sheet-like material 4.

The cutter device 6 provided on the downstream side of the nip roll device 5 has a fixed blade 14 and a rotary blade 15 as shown in FIGS. And rotary blade 1
Reference numeral 5 employs a polygonal blade for cutting a thick portion of the ear portion of the sheet-like material 4, and is rotated by a motor 17 and a speed reducer 18 provided on a frame 16. Further, the cutter device 6 is adapted to be engaged with the pedestal 12 of the drive roll 9 by a clamp device (not shown). As the pedestal 12 moves, the cutter device 6 moves on the rail 12a in the direction indicated by the arrow D in FIG. Has become. Further, the frame 16 of the cutter device 6 is
The rail 16a is movable, and the motor 17 for rotating the rotary blade 15 moves the rail 16a in the direction indicated by the arrow F in FIG. And
By sandwiching the sheet-like material 4 extruded in the direction indicated by the arrow C in FIG. 2 between the fixed blade 14 and the rotary blade 15, the cutter device 6 is moved in the width direction of the sheet-like material 4, whereby the nip roll device is formed. The sheet-like material 4 sandwiched by the sheet 5 can be cut at a predetermined position over the entire width. Further, the motor 17 is preferably an AC servomotor in order to accelerate the rising and falling of the rotary blade 15.
The angle can be changed around the axis of the motor 17 so that the direction of the sheet 4 can be adjusted according to the traveling speed of the sheet 4.

The roll group 7 is provided in parallel with the cooling drum 3 on the downstream side of the cooling drum 3 and has three rolls 19, 20 and 21 having a width equal to the width of the cooling drum 3 and is arranged above. Between the two and the two above, one below is arranged in a zigzag pattern.

The carrier device 8 includes a plurality of pairs of sprockets 22, an endless chain 23 wound around these sprockets 22, a carrier bar 24 spanned between the left and right chains 23, and a running path of the chains 23. The adhesive nip rolls 25 are arranged so as to be orthogonal to each other.

As shown in FIGS. 1 and 2, the sprocket 22 is located outside both ends of the cooling drum 3 and the rolls 19, 20 and 21, and is located at the lower half of the cooling drum 3 and the rolls 19 and 2.
A plurality of pairs are arranged so as to surround 0 and 21, and a chain 23 is wound around these sprockets 22.

The carrier bar 24, as shown in FIG.
It has a main body 26 formed in the shape of a round bar having a length corresponding to the width of the cooling drum 3, and attachment parts 28 to the chain 23 provided at both ends of the main body 26 via shaft members 27. . A double-sided adhesive tape 29 is wrapped around the outer peripheral surface of the main body 26. The double-sided adhesive tape 29 is attached in a range slightly narrower than the width of the sheet-like material 4,
It is designed to prevent unnecessary adhesion to drums and rolls. Further, the carrier bar 24 is a lightweight one in which a heat resistant rubber is provided around an aluminum cored bar, and connection / disconnection with the chain 23 can be performed with one touch, which facilitates handling. The carrier bar 24 is a drive sprocket 3
By driving the motor 31 provided at position 0, the motor moves from the position A shown in FIG. 1 in the direction of arrow G with the rotation of the chain 23. The rotation speed of the chain 23 is synchronized with the rotation of the cooling drum 3. However, since the path of the chain 23 is longer than the path of the sheet-like material 4, the slack is increased by increasing the speed accordingly. In addition, since the path length of the chain 23 may change slightly due to the adjustment of the position of the cooling drum 3, a tension adjusting device, which will be described later, is provided on the chains on both sides to absorb this. Further, by providing the powder clutch 34 as a torque limiter between the sprocket 30 for driving the chain 23 and the motor 31, the carrier bar 24 interferes with the drum or roll, and the chain 23 is driven irregularly. However, this can be absorbed and damage to the carrier bar 24 and the like can be minimized.

The adhesive nip roll 25 is provided below the cooling drum 3 and in the vicinity of the chain 23 which rotates to the roll group 7. The adhesive nip roll 25 has a length substantially equal to the width of the carrier bar 24 and is formed into a round bar shape. At both ends, a shaft member 32 orthogonal to its axis is provided. The reference numeral 32 is mounted on a mount (not shown). And this adhesive nip roll 25
Is always biased toward the chain 23 by the biasing means 33. The tension adjusting device 35 has a tension sprocket 36 and an air cylinder 37 that pivotally supports the tension sprocket 36 on a rod, and is provided close to the upstream side of the drive sprocket 30 as shown in FIG. A pulling sprocket 36 is hung on the chain 23 between the two sprockets 22 and 22, and the pulling sprocket 36 is pulled by an air cylinder 37 to give a predetermined tension to the chain 23 to prevent slack. ing.

Reference numeral 38 denotes an air nozzle.
The air nozzle 38 has the same width as the cooling drum 3 and is divided to avoid interference with the nip roll device 5 and the cutter device 6. Then, the sheet-shaped material 4 is moved toward the sheet-shaped material 4 extruded from the extruder die 2 toward the peripheral surface of the cooling drum 3 in the right direction shown by the chain double-dashed line in FIG. 1 to cool the sheet-shaped material 4. Has become.

Next, the operation of the automatic rolling device 1 will be described.

The high temperature sheet-like material 4 is extruded from the extruder die 2 toward the peripheral surface of the cooling drum 3 rotating in the direction of the arrow (see FIG. 5 (a)). When the extruded sheet-like material 4 is extruded along the circumferential surface of the cooling drum 3 in the rotation direction, the sheet-like material 4 is cooled by the cool air from the air nozzle 38 and is cooled by the cool air from the air nozzle 38. As shown by the dotted line in Fig. 5 (b), it shakes. Here, the drive roll 9 of the nip roll device 5 moves in the direction indicated by the arrow D in FIG. 2, and the free roll 10 turns in the direction indicated by the arrow E in FIG. 2 and is illustrated in FIGS. 3 and 5C. The sheet-like material 4 thus cooled is sandwiched. Then, the cutter device 6 moves in the direction indicated by the arrow F in FIG. 2 and cuts a predetermined position of the sheet-like material 4 in the width direction thereof.

When the sheet 4 is cut, the cutter device 6 and the nip roll device 5 return to the positions shown in FIGS. 2 and 5 (d), and the motor 31 of the drive sprocket 30 is driven to move the chain 23 to the position shown in FIG. Rotate in the direction indicated by the arrow. Then, the double-sided adhesive tape 29 of the carrier bar 24 comes into contact with the sheet-like material 4, and the sheet-like material 4 is pulled downstream as the carrier bar 24 moves (FIG. 5).
(See (e) and (f)). Then, the adhesive nip roll 25
The sheet-like object 4 adhered to and supported by the carrier bar 24
Abut. Here, since the adhesive nip roll 25 is always urged by the urging means 33 in the direction opposite to the rotation direction of the chain 23, the adhesive nip roll 25 further presses the sheet-like material 4 to the carrier bar 24 to adhere it. This is the case (see FIGS. 6A and 6B).

Then, the traveling of the carrier bar 24 (see FIG.
6 (d), the sheet-like material 4 passes over the first roll 19 and is wound from the upper side as shown in FIG. 6 (d), and then the next roll 20 is rolled as shown in FIG. 6 (e).
It is wound from below. Further, as shown in FIG. 6 (f), when the carrier bar 24 is wound around the last roll 21 from above and reaches the position B shown in FIG. 6 (f), the rotation of the chain 23 is stopped. As described above, the sheet material 4 is wound around the roll group 7. After that, the sheet-like material 4 adhered to the carrier bar 24 is manually cut off by a cutter, and the tip of the sheet-like material 4 is manually connected to a roll of a stretching device (not shown). After that, the chain 23 rotates and the carrier bar 24 is conveyed from the B position to the A position shown in FIG. 1 to complete one cycle. The standby position of the carrier bar 24 is not limited to the A position as described above, but a position suitable for preparation for the next cycle, that is, a position suitable for removing the carrier bar 24 for winding the double-sided adhesive tape 29, For example, it can be set at any position of the path from the periphery of the roll group 7 to the periphery of the drive sprocket 30. In this case, at the start of the rolling operation, the sequence is set so that the carrier bar 24 reaches the position A and another operation is started at the same time.

In the above, the example in which the chain 23 is rotated within the range of the automatic roll-applying device 1 has been described, but the path of the chain 23 is extended through the roll group 7 to the stretching device which is a post-process to cool the chain. It is possible to automatically pass the sheet-like material 4 from the drum 3 to the stretching device. Also,
During the operation cycle of automatic roll application, the extrusion speed from the extruder base and the drive speed of the cooling drum 3 are adjusted,
The cutting operation in the cutting device 6 can be facilitated by setting the thickness of the sheet-like material 4 to be thinner than the manufacturing conditions.

[0022]

As described above, in the apparatus for automatically rolling a molten resin sheet material according to the present invention, the molten resin sheet material extruded from the extruder die and separated from the peripheral surface of the cooling drum is a sheet material. It is swayed by the cold air blown out from the cooling air nozzle, but in the present invention, the drive roll is moved with respect to the molten resin sheet on the basis of the free roll side and the sheet is rotated at the same speed as the sheet. Since the swaying sheet-like material is sandwiched by the nip roll device, the sheet-like material can be sandwiched in accordance with the swing width of the swaying sheet-like material. You can cut things. Therefore, there is no danger even if the sheet material is at a high temperature. Then, in the adhesive nip roll of the carrier device, the sheet-like object rotating while being in contact with the adhesive tape of the carrier bar is urged in the direction opposite to the rotating direction by the adhesive nip roll. The bar is automatically wrapped (without human intervention) and inserted, and as a result,
The tip of the sheet-like material can be pulled by a carrier device and wound around a roll group provided on the downstream side of the cooling drum in a state where the tip of the sheet-like material is securely adhered to the carrier bar. The material can be wound around a roll group. Therefore, since no space is required for a person to work, the space for arranging the rolls is reduced, and the frame structure and the like are simplified, resulting in an inexpensive device. Further, labor by a person is not required, which saves labor. And sheet-like materials can be provided at low cost.
Even when the arrangement of the large-diameter cooling drum and the roll is complicated and the space for seating by a person cannot be secured, the device of the present invention can be adopted, which is an excellent effect. Further, by adopting the tension adjusting device according to claim 2, even if the path length of the chain changes due to the adjustment of the position of the cooling drum, this can be absorbed.
The effect is that the chain length can always be kept constant.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an automatic roll-applying device for a molten resin sheet material according to the present invention.

FIG. 2 is a plan view of a nip roll device and a cutter device.

FIG. 3 is a front view of a nip roll device.

FIG. 4 is an outline view of a carrier bar.

FIG. 5 is an explanatory view showing the operation of the automatic roll hooking device.

FIG. 6 is an explanatory view showing the operation of the automatic roll hanging device.

[Explanation of symbols]

 1 Automatic Rolling Device 2 Extruder Mouth 3 Cooling Drum 4 Sheet Material 5 Nip Roll Device 6 Cutter Device 7 Roll Group 8 Carrier Device 9 Drive Roll 10 Free Roll 14 Fixed Blade 15 Rotating Blade 23 Chain 24 Carrier Bar 25 Adhesive Nip Roll 29 Double Sided Adhesive tape 35 Tension adjusting device

Front page continued (72) Inventor Kazuo Sugiyama 200 Onakazato, Fujinomiya-shi, Shizuoka Prefecture Fujisha Makoto Film Co., Ltd. (56) Reference JP-A-2-270526 (JP, A) JP-A-2-57316 (JP, A) JP-A-2-300396 (JP, A)

Claims (2)

(57) [Claims] 1. A while rotating the drive roll at the same speed as the speed of the sheet of that <br/> to the molten resin sheet extruded toward the circumferential surface of the cooling drum from the extruder spinneret free Low
A nip roll device for clamping the moved sheet Le side, cutting a predetermined position of provided the Nippuro <br/> Lumpur device sandwiched a sheet downstream of the nip roll device in the width direction A cutter device, a cooling drum, and a cooling drum provided downstream of the cooling drum.
Sprocket provided outside both ends of the roll group,
An endless transmission member wound around this sprocket,
Wrap the adhesive tape hung on the end-shaped transmission member around the outer peripheral surface
Against the rotating direction of the carrier bar and carrier bar
Sheet on the adhesive tape of this carrier bar by pushing in the direction
Jo was have an adhesive nip roll to adhere the tip of the cut sheet after a predetermined position is wound by pulling the rolls provided downstream of the cooling drum and cooling drum Ruki Yaria An apparatus for automatically rolling a molten resin sheet material, which comprises: 2. The automatic roll-applying device for a molten resin sheet according to claim 1, wherein the endless transmission member has a tension adjusting device.