JP5521517B2 - Sheet forming device - Google Patents

Description

  The present invention includes a material supply unit that supplies and supplies a viscous material from an extrusion port, a material storage unit that temporarily stores the material supplied from the extrusion port by the material supply unit, and a material storage unit that stores the viscous material. A material pressing portion that presses the pressing member to apply a pressing force to the material, and a material rolling portion that forms and discharges the material stored in the material storage portion into a sheet shape with a pair of rolls. The present invention also relates to a sheet forming apparatus including a control unit that controls operations of the material supply unit, the material pressing unit, and the material rolling unit to form the material stored in the material storage unit into a sheet shape.

  Such a sheet forming apparatus manufactures a sheet material by forming a viscous material into a sheet shape. In the operation, the material supply unit pushes and supplies the material to the material storage unit, the material storage unit temporarily stores the material, and the material stored in the material storage unit is a pair of the material rolling unit. It is paid out while being formed into a sheet shape by a roll (for example, see Patent Document 1).

JP 2009-12463 A

By the way, in such a sheet forming apparatus, a gap is formed in the outer peripheral portion of the pressing member at any position in the moving range so that the pressing member can be moved along the pressing direction in the material storage portion. It will be configured.
Therefore, during operation, the material stored in the material storage part easily enters the gap.

  However, in the conventional sheet forming apparatus, when the material enters the gap, it remains as it is. Therefore, at the end of the operation, it is necessary to remove the residual material in the material storage portion and perform a cleaning operation, and improvement has been desired. If the material is left in the material reservoir and the next operation is performed, the remaining material will be mixed into the material newly supplied to the material reservoir due to the operation. There is a possibility that the quality of the shaped material is lowered, which is not preferable.

  This invention is made | formed in view of this situation, The objective is to provide the sheet forming apparatus which can avoid that material remains in the clearance gap of the outer peripheral part of a press member.

In order to achieve the above object, a sheet forming apparatus according to the present invention includes a material supply unit that supplies and supplies a viscous material from an extrusion port, and a material that temporarily stores the material supplied from the extrusion port by the material supply unit. A material pressing part that presses a pressing member and applies a pressing force to the storage part, the material stored in the material storage part, and the material stored in the material storage part by a pair of rolls A material rolling unit that is molded into a sheet shape and dispensed, and the operations of the material supply unit, the material pressing unit, and the material rolling unit are controlled to form the material stored in the material storage unit into a sheet shape. A sheet forming apparatus including a control unit,
The characteristic configuration is that the control unit moves the pressing member to a side opposite to the pressing direction so that the pressing force is released with respect to the material stored in the material storage unit; Is configured to run ,
A material intrusion determining means for determining a material intrusion state in which the material enters the clearance between the outer peripheral portions of the pressing member is provided,
When the material intrusion state is determined by the material intrusion determining unit, the control unit executes the pressing release process .

According to the above characteristic configuration, when the pressure release process is executed in a state where the material enters the outer peripheral portion of the pressing member, the pressing member is moved to the side opposite to the pressing direction and presses the material in the material storage unit. Since the pressing force is released, the material that has entered the gap is released from the state of being sandwiched by the gap. Thereby, the material which existed in the clearance gap is sent between a pair of rolls with the material which existed in the press direction side rather than the material press surface of the press member.
Therefore, it has become possible to provide a sheet forming apparatus capable of avoiding the material remaining in the gap between the outer peripheral portions of the pressing member.
And, by using such a sheet forming apparatus, it is possible to reduce the removal and cleaning work of the residual material in the material storage part at the end of the operation while preventing the deterioration of the quality of the sheet-like material due to the mixing of the residual material. Will be able to.

In addition, during operation, when the material intrusion determining unit determines that the material has entered, the pressure release process is executed. Therefore, even if the material enters the outer peripheral portion of the pressing member, the material remains in the gap. Can be avoided.
Accordingly, it is possible to avoid the material from remaining in the gap in the outer peripheral portion of the pressing member.

Sheet forming equipment according to the present invention for achieving the above object, the extrusion supplies material supply unit viscous material from the extrusion port, temporarily storing the material supplied from said extrusion port by the material supply unit The material storage part, the material pressing part that presses the pressing member against the material stored in the material storage part and applies a pressing force, and the material stored in the material storage part into a pair of rolls The material stored in the material storage unit is formed into a sheet by controlling the operations of the material rolling unit that is molded into a sheet shape and dispensed, and the material supply unit, the material pressing unit, and the material rolling unit. A sheet forming apparatus including a control unit,
The characteristic configuration is that the control unit moves the pressing member to a side opposite to the pressing direction so that the pressing force is released with respect to the material stored in the material storage unit; Is configured to run,
Position detection means for detecting the position in the pressing direction of the pressing member is provided,
Based on the position detection information of the position detection means, the control unit determines an end state in which the amount of material supplied to the material storage unit by the material supply unit is less than a steady state, and is in the end state When determining that the material supply unit and the material supply unit and the output ratio of the output of the material supply unit relative to the output of the material rolling unit is larger than before determining that it is the final state, the output ratio of the output of the material supply unit and the supply output ratio It is configured to be able to execute the final operation to control the operation of the material rolling section,
The control unit is configured to execute the pressing release process after executing the final operation.

According to the above characteristic configuration , when the pressure release process is executed in a state where the material enters the outer peripheral portion of the pressing member, the pressing member is moved to the side opposite to the pressing direction and presses the material in the material storage unit. Since the pressing force is released, the material that has entered the gap is released from the state of being sandwiched by the gap. Thereby, the material which existed in the clearance gap is sent between a pair of rolls with the material which existed in the press direction side rather than the material press surface of the press member.
Therefore, it has become possible to provide a sheet forming apparatus capable of avoiding the material remaining in the gap between the outer peripheral portions of the pressing member.
And, by using such a sheet forming apparatus, it is possible to reduce the removal and cleaning work of the residual material in the material storage part at the end of the operation while preventing the deterioration of the quality of the sheet-like material due to the mixing of the residual material. Will be able to.
Further, as the amount of material stored in the material storage portion decreases, the pressing member moves to the side in the pressing direction (material side), so based on the position of the pressing member detected by the position detection means, It is possible to determine the final state in which the material supply amount from the material supply unit to the material storage unit is smaller than the steady state.
And if it determines with it being a terminal state by a control part, terminal operation will be performed.
In this final operation, since the operation of the material supply unit and the material rolling unit is controlled by so-called feedforward control under a setting condition in which the ratio of the payout output to the supply output is larger than that before determining that it is in the final state. The amount of material stored in the section can be effectively increased.
As a result, even when the material supply amount from the material supply unit is decreasing just before the end of the operation, the material storage amount in the material storage unit can be secured close to the amount in the steady state, and the material rolling unit It can suppress that the sheet | seat width | variety of the sheet-like material shape | molded by becomes narrow.
When this final operation is completed, the pressure release process is executed, so that it is possible to avoid the material from remaining in the gap in the outer peripheral portion of the pressing member.
Therefore, it is possible to prevent the material from remaining in the gap in the outer peripheral portion of the pressing member while improving the yield in sheet forming.

  In a further characteristic configuration of the sheet forming apparatus according to the present invention, in the pressing release process, the control unit controls the operation of the material pressing unit to temporarily move the pressing member so that the pressing force is released. Therefore, it is to move to the opposite side to the pressing direction.

According to the above characteristic configuration, even when the press release process is executed, the pressing member is returned to the position before the press release process is executed.
Therefore, even when the pressure release process is performed during operation, when the pressure release process is completed, a pressing force is applied to the material in the material storage unit, and an appropriate operation is accurately restarted.

A further characteristic configuration of the sheet forming apparatus according to the present invention is such that the pair of rolls stores the material in the vertical direction or the upper roll as compared with the lower roll in a state where the respective axes are aligned in the horizontal direction. It is juxtaposed along the diagonally upward direction located on the opposite side to the part side,
The material supply unit is configured such that the extrusion direction of the material is in a horizontal downward direction or an obliquely downward direction in which the tip is downward.
The material pressing portion is located at a position on the rear side in the extrusion direction with respect to the extrusion port and on the upper side in the direction perpendicular to the extrusion direction, and is rotatable around a rotation axis parallel to the axis of the roll. A link supported on the link, the pressing member connected to the upper end portion of the link with the material pressing surface facing downward, and the link connected to the lower end portion of the link. An actuator that moves the pressing member along the pressing direction by rotating it around,
Of the surface on the forward side in the extrusion direction of the extrusion port forming body forming the extrusion port, a portion on the upper side with respect to a rotation axis reference line passing through the rotation axis and parallel to the extrusion direction is the pressing member. In a shape along the movement trajectory, and a portion on the lower side with respect to the rotational axis reference line is configured in a shape orthogonal to the extrusion direction,
When the material pressing portion is controlled to position the pressing member at the lower limit position in the pressing direction, a base end portion that is an end portion on the rear side in the extrusion direction on the material pressing surface of the pressing member is It exists in the point located in the same height as a rotating shaft center reference line, or an upper position from the rotating shaft center reference line.

According to the above characteristic configuration, the link having the pressing member connected to the distal end portion is configured to press the material by moving the pressing member in the pressing direction by swinging the link around the rotation axis by the actuator. As the position of the rotation axis is moved closer to the tip side from the center of the link, an actuator having a smaller output can be employed while obtaining a predetermined pressing force.
In this case, of the surface on the forward side in the extrusion direction of the extrusion port forming body, the portion on the upper side with respect to the rotation axis reference line is shaped along the movement locus of the pressing member and is lower than the rotation axis reference line. The side portion is configured in a shape orthogonal to the extrusion direction.
When the pressing member is positioned at the lower limit position in the pressing direction, the base end portion of the material pressing surface of the pressing member is at the same height as the rotational axis reference line or at a position above the rotational axis reference line. Therefore, the pressing member is moved along the pressing direction while the gap on the extrusion port forming body side of the pressing member is maintained at a constant width.
As a result, when the pressing member is moved in the pressing direction, the width of the gap on the extrusion port forming body side is reduced, so that it is possible to prevent the material from being pressurized and entering the back in the gap. By performing the opening process, it is possible to accurately avoid the material remaining in the gap in the outer peripheral portion of the pressing member.
Therefore, by using an actuator with a small output as an actuator for applying a pressing force to the material in the material reservoir, the sheet forming apparatus can be reduced in cost, but the material is deep in the gap on the extrusion port forming body side. It is possible to prevent the material from remaining in the gap between the outer peripheral portions of the pressing member.

A further characteristic configuration of the sheet forming apparatus according to the present invention is configured such that the thickness of the pressing member is thicker toward the front side in the extrusion direction,
When the material pressing portion is controlled so as to position the pressing member at the lower limit position, a distal end portion which is an end portion on the material pressing surface of the pressing member on the side in the extrusion direction is the rotation axis reference It is in the point located in the position below the roll axis reference line parallel to the extrusion direction through the axis of the roll above and below the line.

According to the above characteristic configuration, when the pressing member is positioned at the lower limit position, the base end portion of the material pressing surface of the pressing member is at the same height as the rotation axis reference line or a position above the rotation axis reference line. The tip is located below the rotation axis reference line and below the roll axis reference line, so when the pressing member is located at the lower limit position, the lower limit Even when the amount of material stored in the material storage portion is small, the pressing force against the material increases toward the tip side of the material pressing surface, and the material is guided by the material pressing surface. Thus, the material supplied from the material supply unit into the material storage unit through the extrusion port is smoothly guided into the gap between the pair of rolls, formed into a sheet shape, and discharged.
And since the pressing force against the material increases toward the tip end side of the material pressing surface, the material is likely to enter the gap on the roll side of the pressing member, but the thickness of the pressing member is configured to increase toward the front side in the extrusion direction. Therefore, it is possible to prevent the material that has entered between the front end portion of the pressing member and the outer peripheral surface of the upper roll from climbing on the upper surface of the pressing member and removing the material even if the pressing release process is performed. it can. Note that the material that has entered between the tip of the pressing member and the outer peripheral surface of the upper roll is fed into the gap between the pair of rolls by the outer peripheral surface of the upper roll, and therefore does not remain.
Accordingly, it is possible to prevent the material from remaining on the upper surface of the pressing member.

Side view showing overall configuration of sheet forming apparatus Cross-sectional plan view showing main parts of sheet forming equipment Longitudinal front view showing material storage part of sheet forming device Longitudinal side view showing material pressing part, material storage part and material rolling part of sheet forming apparatus Longitudinal side view showing material pressing part, material storage part and material rolling part of sheet forming apparatus The figure which shows the time chart in the control action of a sheet forming apparatus The figure explaining the control conditions and effect | action in control operation of a sheet forming apparatus The figure explaining the control conditions and effect | action in control operation of a sheet forming apparatus The figure which shows the flowchart in control operation | movement of a sheet forming apparatus. A longitudinal side view showing a material pressing part, a material storage part and a material rolling part of a sheet forming apparatus according to another embodiment

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the sheet forming apparatus temporarily stores the material supply unit 1 that supplies and supplies the viscous material W from the extrusion port 11, and the material W that is supplied from the extrusion port 11 by the material supply unit 1. The material pressing unit 4 that presses the pressing member 41 and applies a pressing force to the material W stored in the material storage unit 3 against the material storage unit 3 and the material W stored in the material storage unit 3. And a material rolling unit 2 that forms and discharges the material W stored in the material storage unit 3 into a sheet shape with a pair of rolls 21, and a control unit C that controls the operation. In addition, the material press part 4 shall be pressed by the press direction Dp which the press member 41 cross | intersects the extrusion direction Ds by the material supply part 1. FIG.
Further, the sheet-shaped material Ws is loosened in the conveying section between the material rolling unit 2 and the sheet material processing apparatus 70 that draws the sheet-shaped material Ws formed in the material rolling unit 2 and performs a predetermined process. A buffer unit 60 is provided.

Next, description will be made regarding each part of the sheet forming apparatus.
As shown in FIGS. 1, 2, and 4, the pair of rolls 21 of the material rolling unit 2 is such that the upper roll 21 is lower than the lower roll 21 in a state in which the respective axis centers 21 a are aligned in the horizontal direction. Are arranged in parallel along an obliquely upward direction located on the side opposite to the material storage unit 3 side.
One (lower side in this embodiment) roll 21 is formed so as to be driven and rotated to feed out the material W by a rotary drive device M such as a motor, and the other (upper side in this embodiment) roll 21 is a gear. It is interlocked and connected to one roll 21 via (not shown) so as to be rotationally driven in the opposite direction. Incidentally, the pair of rolls 21 are rotationally driven in directions opposite to each other so that the outer peripheral surfaces thereof approach each other on the side facing the material reservoir 3.

And it is comprised so that the material discharge | emission amount by the material rolling part 2 may be controlled by controlling the rotational speed of the roll 21. FIG.
In this embodiment, the output of the material rolling section 2 (corresponding to the rotation speed of the roll 21) is changed to two stages by switching the rotation speed of the roll 21 to the reference speed and two stages of a lower speed slower than the reference speed. It is configured to be switchable.

  The reference speed Vr (m / min) of the roll 21 is the required processing amount Q (liter / h) per hour of the material W, the sheet width w (mm), the sheet thickness t (mm), and the rolling efficiency ηr of the roll 21. Is defined by the following Equation 1.

Vr = Q × 10 ³ / (w × t × ηr × 60) (Equation 1)

As shown in FIGS. 1-4, the material supply part 1 is equipped with the biaxial taper screw 13 arranged in parallel with the horizontal direction.
The biaxial taper screw 13 is disposed in the casing 14 in such a posture that the shaft center 13a is closer to each other toward the tip side (see FIG. 2) and the shaft center 13a is lowered toward the tip side (see FIGS. 1 and 4). It is.
The casing 14 is formed in a tapered shape having a generally elliptical cross-sectional shape, and an extrusion port forming body 12 that forms the extrusion port 11 is attached to a front end opening of the casing 14.
That is, the material supply unit 1 is configured so that the extrusion direction Ds of the material W is an obliquely downward direction that is downward as it is earlier.
As shown in FIGS. 1 and 4, a material storage unit 3 is disposed between the material supply unit 1 and the material rolling unit 2.

By controlling the rotational speed of the taper screw 13, the material supply amount by the material supply unit 1 is controlled.
Then, the rotational speed of the taper screw 13 is switched to four stages of a reference speed, a low speed slower than the reference speed, a first high speed faster than the reference speed, and a second high speed faster than the first high speed. The output of the material supply unit 1 (corresponding to the rotational speed of the taper screw 13) can be switched in four stages.

  The reference speed Vs (rotation / min) of the taper screw 13 is the required processing amount Q (liter / h) per hour of the material W, the extrusion amount q (liter / rotation) per rotation of the taper screw 13, and the taper screw. 13 is determined by the following equation (2).

  Vs = Q / (q × ηs × 60) (2)

As shown in FIGS. 1 to 4, the material storage unit 3 is disposed between the material supply unit 1 and the material rolling unit 2 on both the left and right sides of the extrusion port forming body 12 in the extrusion direction Ds from the material supply unit 1. Further, the roll 21 on the lower side of the material rolling section 2 is provided in a state of being in contact with or close to a position below the extrusion port 11 of the extrusion port forming body 12, thereby forming the extrusion port. In the form of being partitioned by the body 12, the left and right side walls 31 and the pair of rolls 21, it is formed in an upper open shape having an upper opening 32 in the upper part.
As shown in FIG. 2, the upper opening 32 is surrounded by the extrusion port forming body 12, the left and right side walls 31, and the upper roll 21, and has a rectangular shape.
That is, the storage part forming member 30 that forms the material storage part 3 includes the extrusion port forming body 12, the left and right side walls 31, and the pair of rolls 21.

As shown in FIGS. 1, 2, and 4, the material pressing portion 4 is located on the rear side with respect to the extrusion port 11 in the extrusion direction Ds and on the upper side in the direction perpendicular to the extrusion direction Ds. A link 43 that is positioned and rotatably supported around a rotation axis 42 that is parallel to the axis 21 a of the roll 21, and a connector 44 with the material pressing surface 41 a facing downward at the upper end of the link 43. And the actuator connected to the lower end of the link 43 and rotating the link 43 around the rotation axis 42 to move the pressing member 41 along the pressing direction Dp. 45.
Then, by actuating the actuator 45 in the direction of pulling the lower end portion of the link 43, the pressing member 41 presses the material W stored in the material storage portion 3 from above to the downward pressing direction Dp. It is configured.

In the present embodiment, the pressing force for pressing the material W by the pressing member 41 is configured to be switched between two stages of low pressure and high pressure.
As the actuator 45, a hydraulic cylinder, a pneumatic cylinder, an electric cylinder or the like can be used.

As shown in FIGS. 2 to 4, the pressing member 41 connected to the upper end of the link 43 as described above is configured in a rectangular shape as viewed in the thickness direction (corresponding to the pressing direction Dp), and the material is stored. It is arranged in the part 3.
And between the outer peripheral part of the press member 41 in the press direction Dp view, and the inner peripheral surface of the storage part formation member 30 so that the press member 41 can be moved along the press direction Dp in the material storage part 3. A gap G is provided between them.
That is, the gap G is a surface facing the base end portion 41b which is the end portion on the rear side in the extrusion direction Ds of the pressing member 41 and the material storage portion 3 of the extrusion port forming body 12 (hereinafter, referred to as a front side surface in some cases). A surface 31s (hereinafter, referred to as an inner surface) facing the material storage portion 3 of each of the left and right side end portions 41d and the left and right side walls 31 of the pressing member 41. ) And a roll side gap G between the tip 41c, which is the end of the pressing member 41 in the extrusion direction Ds, and the outer peripheral surface of the upper roll 21.

  As shown in FIGS. 4 and 5, the extrusion direction Ds (FIG. 4, FIG. 4) passes through the rotational axis 42 of the link 43 in the extrusion direction Ds front side 12s (ie, the front side surface) 12s of the extrusion port forming body 12. 5, the upper portion of the roll 21 on the axis 21 a in the direction of the axis 21 a of the roll 21 is parallel to the rotation axis reference line Ls parallel to the rotation axis center line Ls. The lower portion of the rotation axis reference line Ls is configured to be orthogonal to the extrusion direction Ds.

And as shown in FIG.4 and FIG.5, when the material press part 4 is controlled so that the press member 41 may be located in the minimum position Pb of the press direction Dp, the extrusion direction in the material press surface 41a of the press member 41 A base end portion 41b, which is an end portion on the Ds rear side, is configured to be positioned above the rotation axis reference line Ls.
In other words, when the link 43 is swung around the rotation axis 42 by the actuator 45, the extrusion side gap G having a constant width is always formed when the pressing member 41 is moved along the pressing direction Dp. become.

As shown in FIGS. 2 and 3, the width of the side gap G is equal to the width of the extrusion side gap G.
On the other hand, the width of the roll side gap G is configured to be wider than the width of the extrusion side gap G or the like.
This is because the material W flows from the distal end portion 41 c of the pressing member 41 toward the gap between the pair of rolls 21 by rotating so that the outer peripheral surface of the upper roll 21 enters the material storage portion 3. This is because the material W is less likely to remain in the roll side gap G compared to the extrusion side gap G and the like.

As shown in FIGS. 2 to 5, the pressing member 41 has a plate shape in which the cross-sectional shape on the plane orthogonal to the rotation axis 42 of the link 43 is a substantially right triangle shape in which two corners other than a right angle are different. It is configured.
And as shown in FIG.4 and FIG.5, such a plate-shaped press member 41 is a direction where a right-angle corner | angular part becomes the extrusion direction Ds front side, and the angle of two angles other than a right angle is small. Is connected to the connector 44 by a surface continuous to the right-angled corner in a posture in which the corner is located on the rear side in the extrusion direction Ds.
That is, in the pressing member 41, the surface corresponding to the linear hypotenuse of the substantially right-angled triangular cross section on the surface orthogonal to the rotational axis 42 of the link 43 becomes the material pressing surface 41a, and the thickness of the pressing member 41 However, it is comprised so that it may become thick in the extrusion direction Ds front side.

  As shown in FIGS. 4 and 5, when the material pressing portion 4 is controlled so that the pressing member 41 is positioned at the lower limit position Pb, the distal end portion 41 c of the material pressing surface 41 a of the pressing member 41 has a rotational axis. It is configured to be positioned at a position below the reference line Ls and below the roll axis reference line Lr parallel to the extrusion direction Ds through the axis 21 a of the upper roll 21.

In the present embodiment, the actuator 45 is disposed on the lower side of the sheet forming apparatus, so that the pressing member 41 can be completely opened from within the material storage unit 3 and the space above the upper opening 32 is provided. The material storage unit 3 can be inspected even if it is used effectively and the pressing member 41 is not disassembled and the roll 21 is not moved.
Further, by arranging the actuator 45 on the lower side of the sheet forming apparatus, the arm ratio of the link 43 can be increased, and the thrust generated by the actuator 45 can be reduced.

By the way, since the material pressing part 4 presses the material W stored in the material storage part 3 by applying a preset pressure in the pressing direction Dp facing downward from above, it is stored in the material storage part 3. The position in the pressing direction Dp on the material pressing surface 41a of the pressing member 41 varies within a predetermined range according to the amount of the material W being applied.
Therefore, as shown in FIG. 1, a position detection sensor S1 is provided as position detection means for detecting the position of the pressing member 41 (actually the material pressing surface 41a) in the pressing direction Dp.
In the present embodiment, the position detection sensor S1 is configured by a rotary encoder that detects a rotation angle of the link 43 with respect to the rotation axis 42 (hereinafter, may be described as a position corresponding angle).
That is, when the position corresponding angle when the pressing member 41 is located at the lower limit position Pb in the pressing direction Dp (see FIGS. 4 and 5) is 0 °, the position of the pressing member 41 in the pressing direction Dp is from the lower limit position Pb. The higher the position-corresponding angle becomes, the higher the position-corresponding angle becomes, and the variation in the position-corresponding angle becomes the position variation of the pressing member 41 in the pressing direction Dp.
Therefore, the correlation between the detection information of the position detection sensor S1 and the position of the pressing member 41 in the pressing direction Dp is obtained in advance, and the position detection sensor S1 determines the position corresponding angle of the pressing member 41 in the pressing direction Dp. It is configured to detect as a position.

The control operation of the control unit C will be described.
The control unit C controls the operations of the material supply unit 1 (specifically, the taper screw 13), the material pressing unit 4 (specifically, the actuator 45) and the material rolling unit 2 (specifically, the roll 21). Thus, the material W stored in the material storage unit 3 is formed into a sheet shape.
Specifically, the control unit C controls the operation of the material pressing unit 4 while controlling the operation of the material supply unit 1 and the material rolling unit 2, and the material stored in the material storage unit 3 by the pressing member 41. An operation is performed so as to form the material W into a sheet while applying a pressing force to the W.
In the present invention, the controller C moves the pressing member 41 to the opposite side to the pressing direction Dp so that the pressing force is released against the material W stored in the material storage unit 3. The process is configured to be executable.
In this embodiment, as shown in FIG. 6, the control unit C is configured to sequentially execute a filling operation, a normal operation, and an end operation for each lot.

In this embodiment, the control unit C controls the operation of the material pressing unit 4 in the pressing release process so that the pressing member 41 is temporarily opposite to the pressing direction Dp so that the pressing force is released. It is comprised so that it may move to the side.
Further, a material intrusion determining means C1 for determining a material intrusion state in which the material enters the gap G is provided.
The material intrusion determining means C1 is configured to determine that the material intrusion state is present every time the set time Ts elapses in a normal operation described later. By conducting an experiment or the like in advance, the time required for the material W to enter the predetermined height into either the extrusion-side gap G or the both-side gap G during the normal operation is obtained. A set time Ts is set.
The control unit C is configured by using a sequencer. As shown in FIG. 1, the material intrusion determination unit C1 is provided in the control unit C in a program format.

A description will be given for each process.
In the normal operation, the control unit C controls the operations of the material supply unit 1 and the material rolling unit 2 so that the position of the pressing member 41 detected by the position detection sensor S1 becomes a preset setting position. It is configured.
Specifically, in the normal operation, the control unit C outputs the material supply unit 1 with respect to the output of the material rolling unit 2 so that the position of the pressing member 41 detected by the position detection sensor S1 becomes the set position. The operation of the material supply unit 1 and the material rolling unit 2 is controlled so as to adjust the ratio of the payout output to the supply output, which is the ratio, within the set range.
And the control part C will determine that it is a material penetration | invasion state every time set time Ts passes during execution of a normal driving | operation, and if it determines that it is in a material penetration | invasion state, it will perform a press release process. It is configured.

Further, the control unit C is configured to determine an end state in which the material supply amount to the material storage unit 3 by the material supply unit 1 is smaller than the steady state based on the detection information of the position detection sensor S1. Here, the steady state refers to a state in which normal operation is constantly performed.
Further, when the control unit C determines that it is in the final state, the control unit C performs the final operation, and in the final operation, the ratio before the discharge output to supply output ratio is determined to be in the final state (that is, the normal operation) The operation of the material supply unit 1 and the material rolling unit 2 is controlled under a setting condition that is larger than the setting range of the payout output to supply output ratio in FIG.
In this embodiment, the setting condition sets the payout output to supply output ratio by making the output of the material supply unit 1 larger than the output in normal operation and making the output of the material rolling unit 2 smaller than the output in normal operation. This is a condition for making it larger than the range.
And the control part C is comprised so that a press release process may be performed immediately after final stage operation is performed.

Next, a control operation of the entire sheet forming operation for forming the material W into a sheet will be described with reference to FIGS.
6 shows a time chart of the control operation, FIGS. 7 and 8 show processing conditions and actions in each process, and FIG. 9 shows a flowchart of the control operation.

  First, the control unit C performs sheet forming by the material rolling unit 2 until the storage amount of the material W in the material storage unit 3 is changed until the position correspondence angle α detected by the position detection sensor S1 becomes the setting angle K1 for balancing. The filling operation for supplying the material W to the material storage unit 3 is executed so that the storage amount becomes possible (steps # 1 and # 2).

  Subsequently, when the position-corresponding angle α detected by the position detection sensor S1 reaches the setting angle K1 for balancing, the control unit C rolls the material until it decreases to the setting angle K2 for starting the final operation. Based on the position corresponding angle α (position of the pressing member 41) detected by the position detection sensor S1, while the material W is formed into a sheet shape at the portion 2, the position corresponding angle α becomes the balance setting angle K1. As such (so that the position of the pressing member 41 is a preset position), feedback for controlling the operation of the material supply unit 1 and the material rolling unit 2 to adjust the payout output to supply output ratio within a set range. Normal operation by control is executed (steps # 2 to # 6).

In a normal operation, the control unit C controls the actuator 45 so that the pressing force of the material W by the pressing member 41 becomes a high pressure, and the taper screw is set so that the position corresponding angle α becomes the setting angle K1 for balancing. 13 is adjusted, and the rotation speed of the roll 21 is adjusted to the reference speed.
The adjustment of the rotation speed of the taper screw 13 will be described.
That is, the lower set value α _L of the balance angle is set under the condition of K2 <α _L <K1, and the higher set value α _H of the balance angle is set under the condition of α _H > K1, and is detected by the position detection sensor S1. Based on the position corresponding angle α, the lower set value α _L and the upper set value α _H , the rotational speed Vs of the taper screw 13 is adjusted as follows.
When K2 <α <α _L , Vs = first high speed α _L ≦ α ≦ α _H , Vs = reference speed α> α _H , Vs = low speed In this normal operation, the material reservoir 3 Since the sheet rolling is performed in the material rolling unit 2 in a state in which the storage amount of the material W is appropriately maintained, the sheet can be formed so that the variation in the sheet width is within the target sheet width range, and the variation in the sheet width is achieved. It is possible to manufacture a high-quality sheet-like material Ws with a small amount.

The control unit C executes the pressure release process every time the set time Ts elapses during normal operation (steps # 2 to # 6) (steps # 4 and 5).
In this pressing release process, the control unit C moves the pressing member 41 to the side opposite to the pressing direction Dp, and the position corresponding angle detected by the position detection sensor S1 is detected when the set time Ts has elapsed. After the angle corresponding to the position detected by the sensor S1 (hereinafter sometimes referred to as a starting position corresponding angle) αm is added to the pressing release setting angle β, the pressing member 41 is moved in the pressing direction Dp. The operation of the material pressing portion 4 is controlled so as to return to the pressing position where the material W can be pressed by moving the material W. Here, the pressing position is a position at which the material W can be pressed again by moving the pressing member 41 in the pressing direction Dp after temporarily releasing the state of pressing the material W.
Further, the controller C adjusts the rotational speed of the roll 21 to the reference speed in the press release process, as in the normal operation, and the rotational speed of the taper screw 13 is the rotational speed in the normal operation before starting the press release process. Adjust to.

However, the upper limit position of the pressing member 41 in the pressing direction Dp in the material storage unit 3 is set in advance under the condition that the base end portion 41 b in the material pressing surface 41 a of the pressing member 41 is lower than the upper end of the side wall 31. .
In addition, when the angle obtained by adding the pressing release setting angle β to the start position corresponding angle αm is larger than the position corresponding angle corresponding to the upper limit position, the control unit C causes the position detection sensor S1 to After the position corresponding angle detected in this way becomes the position corresponding angle corresponding to the upper limit position, the operation of the material pressing unit 4 is controlled so as to return to the pressing position.

Here, by moving the pressing member 41 to the side opposite to the pressing direction Dp, the thin plate material Wr contained in the gap G is accurately delivered to the gap between the pair of rolls 21 together with the material W below the pressing member 41. As shown in FIG. 7 and FIG. 8, the pressing release setting angle β is set to an angle at which the pressing member 41 can be positioned above the thin plate material Wr packed in the gap G. ing.
In addition, in order to return the pressing member 41 to the state in which the pressing force is applied to the material in the material storage unit 3 as quickly as possible, the setting angle β for pressing release is set to an angle as small as possible.

During execution of the normal operation, as shown in FIG. 7, the material W enters the extrusion-side gap G and the side-side gap G, and the gap G has a U-shape when viewed in the pressing direction Dp (FIG. 2). The thin plate-like material Wr exists in (see).
Then, when the pressing release process is executed, the pressing member 41 moves upward, and the pressing force applied to the material W in the material reservoir 3 is released, The letter-shaped thin plate-like material Wr is sent out to the gap between the pair of rolls 21 together with the material W below the pressing member 41 and discharged.
Therefore, the material W can be prevented from remaining in the gap G.
As a result, it is possible to reduce the removal and cleaning work of the residual material in the material reservoir 3 at the end of the operation while preventing the quality of the sheet-like material from being deteriorated due to the mixing of the residual material.
The time required to move the pressing member 41 so as to return to the pressing position after increasing the position corresponding angle to the start position corresponding angle αm plus the pressing release setting angle β is, for example, several seconds. is there.

  While the control unit C is executing the normal control (steps # 2 to # 6), the material supply unit 1 supplies the material storage unit 3 to the material storage unit 3 based on the position correspondence angle α detected by the position detection sensor S1. When it is determined whether or not the material supply amount is smaller than the steady state, and the position corresponding angle α detected by the position detection sensor S1 is reduced to the set angle K2 for starting the final operation, the material supply unit 1 stores the material. It determines with the material supply amount to the part 3 being less than a steady state.

When the control unit C determines that the material supply amount to the material storage unit 3 by the material supply unit 1 is smaller than the steady state, the position corresponding angle α detected by the position detection sensor S1 is used for the final operation stop. The final operation is executed until the set angle K3 is reached (steps # 6 to # 8).
In this final operation, the control unit C adjusts the rotational speed of the taper screw 13 to the second high speed in a state where the actuator 45 is controlled so that the pressing force of the material W by the pressing member 41 becomes high, and the roll The rotational speed of 21 is adjusted to a low speed.

That is, in the final operation, the control unit C is configured to control the operation of the material supply unit 1 and the material rolling unit 2 under a setting condition that makes the payout output to supply output ratio larger than the setting range in the normal operation. It will be.
In this embodiment, as described above, the set condition is such that the output of the material supply unit 1 is larger than the output in normal operation and the output of the material rolling unit 2 is smaller than the output in normal operation. The supply output ratio is set to be larger than the set range.

When the position corresponding angle α detected by the position detection sensor S1 becomes the set angle K3 for stopping the final operation in the final operation, the control unit C executes the pressure release process after stopping the final operation (step #). 8, 9).
In this pressing release process, the control unit C, after the position corresponding angle detected by the position detection sensor S1 is an angle obtained by adding the pressing opening setting angle β to the starting position corresponding angle αm (= K3), The operation of the material pressing portion 4 is controlled so as to return to the starting position corresponding angle αm (= K3) (see FIG. 8).
In the press release process after the final operation, the control unit C adjusts the rotational speed of the roll 21 to a low speed similarly to the final operation, and sets the rotational speed of the taper screw 13 to the second high speed similar to the final operation. adjust.

After executing the pressure release process following the final operation, the control unit C positions the pressing member 41 at the lower limit position until the sheet detection sensor S2 provided in the material rolling unit 2 detects no sheet discharge. The operation of the material pressing unit 4 is controlled so that the operation of the material supply unit 1 and the material rolling unit 2 is continued under the same conditions as the final operation, and no sheet discharge is detected by the sheet detection sensor S2. When detected, stop processing for stopping the operation of the sheet forming apparatus is executed (steps # 9 to # 11).
In this stop process, the control unit C stops the sheet forming apparatus by stopping the operation of the taper screw 13 of the material supply unit 1, the actuator 45 of the material pressing unit 4, the roll 21 of the material rolling unit 2, and the like.

The setting angle K1 for balancing, the setting angle K2 for starting the final operation, and the setting angle K3 for stopping the final operation are set under the condition of K3 <K2 <K1.
Here, when the material W is formed into a sheet shape by the material rolling unit 2, a target sheet width range is set as a target sheet width range. And the set angle K1 for balancing corresponds to the storage amount of the material storage unit 3 that can be properly formed in the material rolling unit 2 so that the sheet width is reduced within the target sheet width range. To set.
Further, the setting angle K2 for starting the final operation is the lower limit value of the storage amount of the material storage portion 3 in which the sheet rolling can be performed so that the sheet width is equal to or greater than the lower limit value of the target sheet width range. Set according to. Further, the setting angle K3 for stopping the final operation is set to an angle equal to or larger than the position corresponding angle corresponding to the lower limit position Pb. Incidentally, in this embodiment, the setting angle K3 for stopping the final operation is set to a position corresponding angle corresponding to the lower limit position Pb.

When the pressing member 41 is positioned at the lower limit position Pb, the base end portion 41b of the material pressing surface 41a of the pressing member 41 is positioned above the rotational axis reference line Ls, and the distal end portion 41c is the rotational axis reference. Since it is located below the line Ls and below the roll axis reference line Lr, when the pressing member 41 is located at the lower limit position Pb, it is located near the upper limit position Pb. When the amount of material stored in the material storage portion 3 is small, the pressing force against the material W increases toward the tip side of the material pressing surface 41a, and the material W is guided by the material pressing surface 41a. Thus, the material W in the material reservoir 3 is smoothly guided into the gap between the pair of rolls 21 and formed into a tote shape.
And since the pressing force with respect to the material W becomes large toward the front end side of the material pressing surface 41a, the material W can easily enter the roll side gap G, but the thickness of the pressing member 41 becomes thicker toward the extruding direction Dp. Since it is comprised, it can prevent that the material W which entered between the front-end | tip part 41c of the press member 41 and the outer peripheral surface of the upper roll 21 runs on the upper surface of the press member 41. FIG.
The material W that has entered between the front end portion 41c of the pressing member 41 and the outer peripheral surface of the upper roll 21 is fed into the gap between the pair of rolls 21 by the outer peripheral surface of the upper roll 21, so that it remains. Absent.

When the final operation is not performed, as shown by a two-dot chain line in FIG. 6, when the position corresponding angle α detected by the position detection sensor S1 decreases to the set angle K2 for starting the final operation, the pressing is performed. In a state where the actuator 45 is controlled so that the pressing force of the material W by the member 41 is set to a high pressure, the rotational speed of the taper screw 13 is adjusted to the first high speed, and the rotational speed of the roll 21 is adjusted to the reference speed. Become.
Next, the shape of the sheet-like material Ws formed in the material rolling unit 2 is compared between the case where the final operation as described above is executed and the case where it is not executed.
As shown in FIG. 6, when the final operation is performed, the sheet width is narrower than a predetermined set value at the end portion of the sheet-like material Ws formed by the material rolling unit 2 as compared with the case where the final operation is not performed. The length of the narrow portion Ae can be shortened.
Therefore, it is understood that the yield in sheet forming can be improved by executing the final operation.

[Another embodiment]
Next, another embodiment will be described.
(1) In the above embodiment, the pressure release processing is executed every time the material intrusion determination unit C1 determines the material intrusion state in the normal operation, and further, the pressure release processing is executed after the end operation is finished. When the control unit C determines the material intrusion state by the material intrusion determining unit C1, the control unit C executes the pressure release process, or the control unit C executes the press release process after executing the final operation. For example, the timing for executing the press release process can be variously changed .

(2) The specific configuration of the material intrusion determining unit C1 can be variously changed. For example, a material intrusion detection sensor (such as an optical sensor) that detects that the material W has entered into either the extrusion side gap G or the side gap G is provided, and the material intrusion detection means uses the material intrusion detection sensor. C1 may be configured.

(3) In the above embodiment, in the pressure release process, the position corresponding angle α is increased to the angle obtained by adding the setting angle β for pressing release to the start position corresponding angle αm, and then immediately returned to the pressed position. However, the first setting time for the pressure release process may be maintained in a state where the position corresponding angle α is an angle obtained by adding the setting angle β for pressing release to the starting position corresponding angle αm, and thereafter, the position corresponding angle α may be returned to the pressing position. .
Further, the position where the pressing member 41 is returned in the pressing release process is not limited to the pressing position as in the above-described embodiment. For example, the position at the start of the pressing release process (that is, the start position corresponding angle αm). Corresponding position).
Alternatively, after the pressing member 41 is moved to the opposite side of the pressing direction Dp at a predetermined setting speed for the second setting time for the pressing release process, the pressing member 41 is moved to the pressing direction Dp side at the setting speed for the second setting time. But it ’s okay.
Moreover, after moving the pressing member 41 to the opposite side to the pressing direction Dp, the form which does not return to the original position may be sufficient. This form is employable in the press release process performed, for example, when the final operation is completed.
Further, in the pressing release process, the angle at which the pressing member 41 is moved to the side opposite to the pressing direction Dp is not the angle obtained by adding the pressing opening setting angle β to the position corresponding angle αm, but the upper limit position of the pressing member 41. It may be a predetermined angle such as an angle corresponding to.

(4) In the above embodiment, the controller C performs the pressure release process based on the material intrusion determining unit C1 determining the material intrusion state or based on the end of the final operation. The controller C is configured to automatically execute the press release process .

(5) As in the above-described embodiment, the base end portion 41b of the material pressing surface 41a of the pressing member 41 is positioned above the rotational axis reference line Ls, and the distal end portion 41c is from the rotational axis reference line Ls. The material pressing surface 41a of the pressing member 41 is limited to a planar shape as in the above-described embodiment when the material pressing surface 41a is configured to be positioned below the roll axis reference line Lr. Is not to be done.
For example, a concave shape that is recessed to the opposite side of the pressing direction Dp or a convex shape that protrudes toward the pressing direction Dp may be used.
Alternatively, as shown in FIG. 10, the material pressing surface 41 a of the pressing member 41 may have a concave portion on the base end portion 41 b side, and the remaining distal end portion 41 c side may have a convex shape.
In this case, since the pressing force can be accurately applied to the material W in the material reservoir 3 by the convex portion on the distal end side of the material pressing surface 41a of the pressing member 41, the variation in the sheet width is further reduced. It can be formed into a sheet.

(6) The cross-sectional shape of the pressing member 41 on the plane orthogonal to the rotational axis 42 of the link 43 is not limited to the shape exemplified in the above embodiment, that is, generally a right triangle shape, for example, a rectangular shape. But it ’s okay.

(7) In the above embodiment, the lower roll 21 is provided in contact with or close to the extrusion port forming body 12, but the lower roll 21 is provided separately from the extrusion port forming body 12, and the material You may provide the bottom wall which comprises the bottom part of the storage part 3. FIG.

(8) In normal operation, the control mode of the material supply unit 1 and the material rolling unit 2 for adjusting the payout output to supply output ratio within the set range is the control mode described in the above embodiment, that is, material rolling. It is not limited to the control mode in which the output of the material supply unit 1 (rotational speed of the taper screw 13) is changed and adjusted while the output of the unit 2 (rotational speed of the roll 21) is kept constant.
For example, a control mode in which the output of the material rolling unit 2 is changed and adjusted while the output of the material supply unit 1 is maintained constant may be employed.
Moreover, the control form which changes and adjusts both the output of the material supply part 1 and the output of the material rolling part 2 may be sufficient.

(9) In the final operation, the specific setting example of the setting condition for making the payout output to supply output ratio larger than the setting range is not limited to the setting example illustrated in the above embodiment.
For example, the output of the material supply unit 1 may be made larger than the output in the normal operation while maintaining the output of the material rolling unit 2 at the output in the normal operation.
Further, the output of the material rolling unit 2 may be made smaller than the output in the normal operation while maintaining the output of the material supply unit 1 at the output in the normal operation.

(10) A pair of rolls 21 may be juxtaposed along the vertical direction with the respective axes 21a along the horizontal direction.
Moreover, you may comprise the material supply part 1 so that the extrusion direction Ds may become a horizontal direction.

(11) The specific structure of the material pressing part 4 is not limited to the structure illustrated in said embodiment.
For example, the pressing member 41 may be driven to reciprocate linearly by an actuator 45 such as a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

(12) The shape of the surface 12s ahead of the extrusion direction Ds in the extrusion port forming body 12 is not limited to the shape exemplified in the above embodiment, and may be, for example, linear.

(13) When the pressing member 41 is located at the lower limit position Pb, the positional relationship of the base end portion 41b and the distal end portion 41c of the material pressing surface 41a of the pressing member 41 with respect to the rotation axis reference Ls and the roll axis reference line Lr is It is not limited to the positional relationship illustrated in the above embodiment, and can be variously changed under the condition that the material W in the material reservoir 3 can be appropriately pressed and guided to the gap between the pair of rolls 21. It is.

  As described above, it is possible to provide a sheet forming apparatus that can avoid the material from remaining in the gap in the outer peripheral portion of the pressing member.

DESCRIPTION OF SYMBOLS 1 Material supply part 2 Material rolling part 3 Material storage part 4 Material press part 11 Extrusion port 12 Extrusion port formation body 12s Front side surface (surface)
21 Roll 21a Axis 41 Pressing member 41a Material pressing surface 41b Base end 41c Tip 42 Rotating shaft 43 Link 45 Actuator C Controller C1 Material intrusion determining means Dp Pressing direction Ds Pushing direction G Clearance Ls at the outer periphery of the pressing member Rotation axis reference line Lr Roll axis reference line Pb Lower limit position R Movement locus S1 Position detection sensor (position detection means)
W material

Claims (5)

A material supply unit for extruding a viscous material through an extrusion port;
A material storage unit for temporarily storing the material supplied from the extrusion port by the material supply unit;
A material pressing part that applies a pressing force by pressing the pressing member against the material stored in the material storing part,
A material rolling section that forms and discharges the material stored in the material storage section into a sheet shape with a pair of rolls,
A sheet forming apparatus comprising: a control unit configured to control the operation of the material supply unit, the material pressing unit, and the material rolling unit to form the material stored in the material storage unit into a sheet shape;
The control unit is configured to be able to execute a pressing release process for moving the pressing member to a side opposite to the pressing direction so that the pressing force is released with respect to the material stored in the material storage unit. ,
A material intrusion determining means for determining a material intrusion state in which the material enters the clearance between the outer peripheral portions of the pressing member is provided,
The sheet forming apparatus , wherein when the material intrusion state is determined by the material intrusion determining unit, the control unit executes the press release process . A material supply unit for extruding a viscous material through an extrusion port;
A material storage unit for temporarily storing the material supplied from the extrusion port by the material supply unit;
A material pressing part that applies a pressing force by pressing the pressing member against the material stored in the material storing part,
A material rolling section that forms and discharges the material stored in the material storage section into a sheet shape with a pair of rolls,
A sheet forming apparatus comprising: a control unit configured to control the operation of the material supply unit, the material pressing unit, and the material rolling unit to form the material stored in the material storage unit into a sheet shape;
The control unit is configured to be able to execute a pressing release process for moving the pressing member to a side opposite to the pressing direction so that the pressing force is released with respect to the material stored in the material storage unit. ,
Position detection means for detecting the position in the pressing direction of the pressing member is provided,
Based on the position detection information of the position detection means, the control unit determines an end state in which the amount of material supplied to the material storage unit by the material supply unit is less than a steady state, and is in the end state When determining that the material supply unit and the material supply unit and the output ratio of the output of the material supply unit relative to the output of the material rolling unit is larger than before determining that it is the final state, the output ratio of the output of the material supply unit and the supply output ratio It is configured to be able to execute the final operation to control the operation of the material rolling section,
Wherein the control unit is, after performing the final operation, the pressing opening process execution to cie over-shot molding apparatus. The said control part controls the action | operation of the said material press part in the said press release process, The said press member is temporarily moved to the opposite side to a press direction so that the said press force may be open | released. Or the sheet forming apparatus of 2. In a state where the pair of rolls has their respective axes aligned along the horizontal direction, the vertical direction or the upper side roll is along an obliquely upward direction in which the lower side roll is located on the opposite side to the material storage unit side. Side by side,
The material supply unit is configured such that the extrusion direction of the material is in a horizontal downward direction or an obliquely downward direction in which the tip is downward.
The material pressing portion is located at a position on the rear side in the extrusion direction with respect to the extrusion port and on the upper side in the direction perpendicular to the extrusion direction, and is rotatable around a rotation axis parallel to the axis of the roll. A link supported on the link, the pressing member connected to the upper end portion of the link with the material pressing surface facing downward, and the link connected to the lower end portion of the link. An actuator that moves the pressing member along the pressing direction by rotating it around,
Of the surface on the forward side in the extrusion direction of the extrusion port forming body forming the extrusion port, a portion on the upper side with respect to a rotation axis reference line passing through the rotation axis and parallel to the extrusion direction is the pressing member. In a shape along the movement trajectory, and a portion on the lower side with respect to the rotational axis reference line is configured in a shape orthogonal to the extrusion direction,
When the material pressing portion is controlled to position the pressing member at the lower limit position in the pressing direction, a base end portion that is an end portion on the rear side in the extrusion direction on the material pressing surface of the pressing member is The sheet forming apparatus according to any one of claims 1 to 3 , wherein the sheet forming apparatus is located at the same height as the rotation axis reference line or at a position above the rotation axis reference line. The thickness of the pressing member is configured to be thicker toward the front side in the extrusion direction,
When the material pressing portion is controlled so as to position the pressing member at the lower limit position, a distal end portion which is an end portion on the material pressing surface of the pressing member on the side in the extrusion direction is the rotation axis reference 5. The sheet forming apparatus according to claim 4 , wherein the sheet forming apparatus is located at a position lower than a roll axis reference line parallel to the extrusion direction through the roll axis above and below the line.

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