JP2009012463A5 - - Google Patents

Description

Sheet forming equipment

  The present invention relates to a sheet forming apparatus, and more particularly to a sheet forming apparatus for forming an elastic material such as rubber and plastic having elasticity (herein, simply referred to as “elastic material”) into a sheet shape.

  Conventionally, a resin material kneaded by a kneader is extruded from a material supply unit equipped with a biaxial taper screw, and the extruded resin material is rolled in a material rolling unit equipped with two rolls and formed into a sheet shape. A sheet forming apparatus is known (see, for example, Patent Documents 1 and 2).

  Among these, as shown in FIG. 7, the sheet forming apparatus described in Patent Document 1 is a material rolling unit including a material supply unit 1 including biaxial taper screws 11a and 11b and two rolls 21a and 21b. The material storage part 3 which stores temporarily the resin material Wa supplied from the material supply part 1 between the part 2 is provided, and the resin material Wa stored in this material storage part 3 is the material rolling part 2 sequentially. To be rolled into a sheet shape.

  By the way, although the material storage part 3 of this sheet forming apparatus is said to be an open bank type whose upper part is opened, in the case of this type of sheet forming apparatus, the material storage part 3 is a resin from the material supply part 1. When the amount of material Wa received (the amount of elastic material W supplied by the material supply unit 1) and the amount of resin material Wa delivered to the material rolling unit 2 (the amount of elastic material W delivered by the material rolling unit 2) fluctuate On the other hand, it has a function as a buffer mechanism, but the amount of the resin material Wa to be fed to the material rolling section 2 is likely to fluctuate.

  In order to eliminate this problem, the amount of the resin material Wa stored in the material storage unit 3 is detected as in the sheet forming apparatus described in Patent Document 2, and the material is determined according to the detected value. Although it has been proposed to control the amount of resin material Wa received from the supply unit 1, the resin to the material rolling unit 2 can be controlled only by controlling the amount of the resin material Wa stored in the material storage unit 3. It was difficult to eliminate fluctuations in the delivery amount of the material Wa.

On the other hand, what is called a closed bank type in which the upper part of the material storage part of the sheet molding apparatus is closed has been proposed, but in the case of elastic rubber or plastic among the resin materials, the resin material stored in the material storage part Pressure distribution (variation of pressure depending on location) occurs, so even if the amount of resin material received from the material supply unit is controlled based on the detected value of pressure applied to the resin material at a specific location It has been difficult to eliminate fluctuations in the amount of resin material delivered to the material rolling section.
In the case of a closed bank type sheet forming apparatus, since there is no buffer mechanism when the amount of resin material received from the material supply unit and the amount of resin material delivered to the material rolling unit fluctuate, control of the material supply unit When the internal pressure of the material storage part suddenly increases due to the response performance of the mechanism or the like, there is a problem that a large load is applied to the constituent members of the material supply part and the material rolling part, resulting in damage to the apparatus.
Furthermore, in the case of a closed bank type sheet forming apparatus, there is a problem that the apparatus has to be disassembled in order to inspect and clean the material storage section.
Japanese Examined Patent Publication No. 2-42331 JP-A-5-104607

In view of the problems of the above-described conventional sheet forming apparatus, the present invention eliminates fluctuations in the amount of elastic material delivered to the material rolling section and forms a high-quality sheet with a uniform shape and high dimensional accuracy. Further, it is a first object to provide a sheet forming apparatus that can absorb a sudden change in the internal pressure of the material reservoir.
Moreover, this invention makes it the 2nd objective to provide the sheet forming apparatus which can perform the inspection and cleaning of a material storage part easily.

To achieve the above first and second objects, the sheet forming device of the present invention, for temporarily storing the material supply section for supplying the elastic material, the elastic material supplied from the material supply unit An elastic material stored in the material storage unit in a sheet forming apparatus including a material storage unit and a material rolling unit for rolling the elastic material stored in the material storage unit and forming the material into a sheet shape the provided materials pressing mechanism for pressing over preset pressure from above, an elastic material material pressing mechanism, the material pressing member and is stored from a material pressing surface of the material pressing member in the material reservoir an actuator for applying the preset pressure to consists of a link mechanism for transmitting the force of the actuator to the material pressing member, an area the material reservoir of material pressing surface of the material pressing member constituting the material pressing mechanism Characterized in that the set at 30-95% of the area of the upper opening.

  In this case, it is possible to provide operation control means for controlling the amount of elastic material supplied by the material supply unit and / or the amount of elastic material discharged by the material rolling unit according to the position of the material pressing surface of the material pressing member.

  And before the driving of the material rolling unit, the operation control means sets the material supply amount by the material supply unit to a high supply amount larger than the rated supply amount, and when the position of the material pressing surface of the material pressing member rises, The driving of the material rolling unit can be started, and the material supply amount of the material supply unit can be set to the rated supply amount.

Further, the pressure of the material pressing mechanism, before driving the material roll unit includes holds the low pressure rise response of the material pressing member is increased, the pressure control means for maintaining the pressure set in advance after the driving of the material rolled portion be able to.

  Moreover, while providing the side wall of a material storage part so that a movement in the contact / separation direction is possible, a material press member can be formed so that expansion-contraction is possible in the width direction.

Moreover, the elastic material pressed by the material pressing member can be supported by the lower roll of the pair of upper and lower rolls constituting the material rolling portion.

According to the sheet forming apparatus of the present invention, by providing a material pressing mechanism for pressing over the pressure set in advance the elastic material stored in the material reservoir from above, the material reservoir by material pressing mechanism while applying pressure to the elastic material stored in, it is possible to feed the elastic material stably to the material rolling unit, it is possible to eliminate variations in the delivery rate of the elastic material to the material the rolling unit, whereby It is possible to form a high-quality sheet with a uniform shape and high dimensional accuracy.
Then, by applying a pressure to the elastic material stored in the material reservoir by material pressing mechanism, for example, if the internal pressure exceeds the set value is generated in the material reservoir, by material pressing member is raised, the material When the volume of the reservoir increases, the internal pressure of the material reservoir can be reduced, and when the internal pressure further increases, the material pressing member rises to the opening end of the upper opening of the material reservoir, thereby The elastic material can be discharged out of the material storage part in an open bank state in which the upper side is substantially open, and thus accidents such as damage to the apparatus can be prevented in advance.
In addition, since the elastic material can be stably fed out to the material rolling part, even in the case of an elastic material with poor biting in the material rolling part, it can be bitten into the material rolling part without slipping.
Further, the material pressing mechanism includes a material pressing member, an actuator for applying a preset pressure to the elastic material stored in the material storage portion from the material pressing surface of the material pressing member, and the force of the actuator is pressed against the material. By comprising the link mechanism that transmits to the member, the material pressing mechanism can be easily disassembled at the position of the link mechanism or the material pressing member, thereby making it easy to inspect and clean the material reservoir. Can do.
Further, when an internal pressure exceeding the set value is generated in the material storage portion by the link mechanism, the material pressing member rises to the opening end of the upper opening portion of the material storage portion, so that the upper portion of the material storage portion is substantially opened. Thus, the elastic material can be discharged out of the material storage portion automatically in the open bank state, thereby preventing an accident such as damage to the apparatus.
Furthermore, by setting the area of the material pressing surface of the material pressing member constituting the material pressing mechanism to 30 to 95% of the area of the upper opening of the material storing part, the open bank type whose upper part is opened to the material storing part It is possible to provide a function as a buffer mechanism for the material, and it is possible to absorb a sudden fluctuation in the internal pressure of the material storage unit, thereby applying a large load to the constituent members of the material supply unit and the material rolling unit. This can prevent the device from being damaged.

  Further, by providing operation control means for controlling the amount of elastic material supplied by the material supply unit and / or the amount of elastic material discharged by the material rolling unit according to the position of the material pressing surface of the material pressing member, The amount of the elastic material stored in the container is maintained at a predetermined amount, whereby a high quality sheet with a uniform shape and higher dimensional accuracy can be formed.

  And before the driving of the material rolling unit, the operation control means sets the material supply amount by the material supply unit to a high supply amount larger than the rated supply amount, and when the position of the material pressing surface of the material pressing member rises, By starting the driving of the material rolling unit and setting the material supply amount of the material supply unit to the rated supply amount, when starting the operation of the sheet forming apparatus, the driving of the material rolling unit is stopped Since the material supply amount by the material supply unit is set to a high supply amount, the elastic material can be quickly filled into the empty material storage unit. In addition, it is possible to detect that the elastic material is completely filled in the material storage part by raising the position of the material pressing surface of the material pressing member, and by starting the driving of the material rolling part as a trigger, Can extrude high quality sheets.

Further, the pressure of the material pressing mechanism, before driving the material roll unit includes holds the low pressure rise response of the material pressing member is increased, the pressure control means for maintaining the pressure set in advance after the driving of the material rolled portion This ensures that the material pressing member is lifted by the elastic material supplied in the initial stage of operation, controls the supply amount of the elastic material by the operation control means, and damages the material rolling part or the like due to excessive supply before driving. Can be prevented.

  In addition, the side wall of the material storage portion is provided so as to be movable in the contact / separation direction, and the material pressing member is formed to be extendable / contractible in the width direction, whereby sheets of various width dimensions can be extruded.

  In addition, by supporting the elastic material pressed by the material pressing member with the lower roll of the two rolls constituting the material rolling portion, the elastic material of the material storage portion is lowered by the material pressing member. It can be pressed against the roll, improving the biting property of the elastic material into the material rolling part, and preventing the elastic material from remaining in the material storage part at the end of the batch processing.

  Hereinafter, an embodiment of a sheet forming apparatus of the present invention will be described based on the drawings.

FIG. 1 shows a first embodiment of the sheet forming apparatus of the present invention.
The sheet forming apparatus is stored in the material supply unit 1 for supplying the elastic material W, the material storage unit 3 for temporarily storing the elastic material W supplied from the material supply unit 1, and the material storage unit 3. And a material rolling section 2 for rolling the elastic material W.

Then, the sheet forming apparatus, a material pressing mechanism 4 for pressing over the pressure set in advance the elastic material W stored in the material reservoir portion 3 from the upper side provided, constituting the material pressing mechanism 4 The area of the material pressing surface 41a of the material pressing member 41 is the area of the upper opening 31 of the material storage part 3 (here, the area of the upper opening 31 is the two rolls 21a, 21b of the material rolling part 2) 30 to 95% of the area of the plane parallel to the plane P including the rotation axis of the upper roll 21a and including the rotation axis of the biaxial taper screw of the material supply unit 1), in particular, an elastic material In the case where it is necessary to prevent the protrusion of the ink, it is set to 85 to 95%.
Incidentally, in the present embodiment, the dimension of the material pressing surface 41a of the material pressing member 41 with respect to the dimension of the upper opening 31 is approximately 70% in the feeding direction of the elastic material W and is perpendicular to the feeding direction of the elastic material W. By setting the direction to about 80%, the area of the material pressing surface 41a of the material pressing member 41 is set to about 56% of the area of the upper opening 31 of the material reservoir 3.

In this way, by providing the material pressing mechanism 4 for pressing over the pressure set in advance the elastic material W stored in the material reservoir portion 3 from above, the material reservoir 3 by material pressing mechanism 4 while applying pressure to the elastic material W stored, it is possible to feed the elastic material W stably to the material rolling unit 2, to eliminate the variations in the delivery rate of the elastic material W into the material the rolling unit 2 This makes it possible to form a high-quality sheet with a uniform shape and high dimensional accuracy.
Then, by applying a pressure to the elastic material W stored in the material reservoir 3 by material pressing mechanism 4, for example, if the internal pressure exceeds the set value is generated in the material reservoir 3, the material pressing member 41 rises By doing so, the volume of the material storage part 3 can be increased, the internal pressure of the material storage part 3 can be reduced, and when the internal pressure further increases, the material pressing member 41 opens the opening end of the upper opening 31 of the material storage part 3 As a result, the elastic material W can be discharged out of the material storage part 3 in an open bank state in which the upper part of the material storage part 3 is substantially opened, thereby causing an accident such as damage to the apparatus. Can be prevented in advance.
Moreover, since the elastic material W can be stably sent out to the material rolling part 2, even in the case of the elastic material W having poor biting in the material rolling part 2, the material rolling part 2 can be bitten without slipping. Can do.
Furthermore, by setting the area of the material pressing surface 41a of the material pressing member 41 constituting the material pressing mechanism 4 to 30 to 95% of the area of the upper opening 31 of the material storing part 3, the upper part is placed on the material storing part 3. A function as an open bank type buffer mechanism that is opened can be provided, and a sudden change in the internal pressure of the material reservoir 3 can be absorbed, whereby the material supply unit 1 and the material rolling unit can be absorbed. It is possible to prevent the apparatus from being damaged by applying a large load to the component 2.

By the way, the ratio of the area of the material pressing surface 41a of the material pressing member 41 to the area of the upper opening 31 of the material storing part 3 has a function as an open bank type buffering mechanism whose upper part is opened to the material storing part 3. From the viewpoint of making it possible, it can be arbitrarily set within the range of 30 to 95% according to the characteristics of the elastic material.
For example, when the elasticity of the elastic material W is extremely large, the material pressing member 41 having a small material pressing surface 41a as compared with the area of the upper opening 31 in the range of about 30 to 80% is used. On the other hand, when the elasticity is not so great, it is about 70 to 95%, and particularly when preventing the protrusion of the elastic material, it is compared with the area of the upper opening 31 in the range of about 85 to 95%. It is preferable to use a material pressing member 41 having a large material pressing surface 41a.

  In this sheet forming apparatus, as in the conventional sheet forming apparatus, a biaxial taper screw (not shown) is provided in the material supply unit 1, and two rolls are provided in the material rolling unit 2. 21a and 21b are arranged.

  Moreover, this sheet forming apparatus makes the rolling part 22 by the two rolls 21a and 21b of the material rolling part 2 be positioned on the surface P including the rotation axis of the biaxial taper screw of the material supply part 1. At the same time, the angle θ formed by the plane P and the horizontal plane is set to 5 to 30 ° (lowering toward the material rolling part 2 side, 15 ° in this embodiment).

Incidentally, in the sheet forming device of the present embodiment, the material pressing mechanism 4 for pressing over the pressure set in advance the elastic material W stored in the material reservoir portion 3 from above, the material pressing member 41, the material pressure that is set in advance in the elastic material W from material pressing surface 41a is stored in the material reservoir portion 3 of the pressing member 41 (not particularly limited, for example, a pressure in the range of 0.2~5MPa An actuator 42 including a hydraulic cylinder, a pneumatic cylinder, an electric cylinder, a spring member, and the like, and a link mechanism 43 that transmits the force of the actuator 42 to the material pressing member 41 (particularly, Although not limited, as shown in FIG. 1, a seesaw-like lever member in which the swing shaft 43 a is positioned outside the material storage portion 3). Unishi to have.
The actuator 42 and the link mechanism 43 of the material pressing mechanism 4 are preferably arranged on the sides so as to avoid the center of the material reservoir 3 as in the second embodiment described later. The space above the upper opening 31 of the reservoir 3 is used effectively, and the material reservoir 3 can be inspected and cleaned without disassembling the material pressing member 41 and without moving the rolls 21a and 21b. Can be possible.

In this way, the force of the actuator 42 is applied to the link mechanism 43 (particularly, as shown in FIG. 1, a link mechanism constituted by a seesaw-like lever member in which the swing shaft 43 a is positioned outside the material storage portion 3. 43), the material pressing mechanism 4 is arranged between the actuator 42 and the link mechanism 43 (between the link mechanism 43 and the material pressing member 41). By simply disassembling, the upper opening 31 of the material reservoir 3 can be greatly opened, whereby the material reservoir 3 can be easily inspected and cleaned.
Further, as shown in FIG. 1, the link mechanism 43 is constituted by a seesaw-shaped lever member in which the swing shaft 43 a is positioned outside the material storage portion 3, so that an internal pressure exceeding the set value is stored in the material storage. When it occurs in the portion 3, the material pressing member 41 rises to the opening end of the upper opening portion 31 of the material storage portion 3, so that the upper portion of the material storage portion 3 is automatically set to an open bank state where the material storage portion 3 is substantially opened. Thus, the elastic material W can be discharged out of the material storage unit 3, whereby accidents such as damage to the apparatus can be prevented in advance.

Incidentally, the material pressing mechanism 4, for over a pressure which is set in advance the elastic material W stored in the material reservoir portion 3 from above is intended to press the elastic material W stored in the material reservoir 3 The position of the material pressing surface 41a of the material pressing member 41 varies in the range between the solid line and the dotted line shown in FIG.
Therefore, operation control means (illustrated) for controlling the supply amount of the elastic material W by the material supply unit 1 and / or the discharge amount of the elastic material W by the material rolling unit 2 according to the position of the material pressing surface 41a of the material pressing member 41. The operation control means controls the supply amount of the elastic material W by the material supply unit 1 and / or the discharge amount of the elastic material W by the material rolling unit 2.
Specifically, when the position of the material pressing surface 41a of the material pressing member 41 approaches the upper limit, the amount of elastic material W supplied by the material supply unit 1 is reduced or the amount of elastic material W paid out by the material rolling unit 2 is increased. In this manner, if the lower limit is approached, the amount of elastic material W supplied by the material supply unit 1 is increased, or the amount of elastic material W discharged by the material rolling unit 2 is reduced.
Thereby, the quantity of the elastic material W stored in the material storage part 3 is maintained at a predetermined amount, whereby the shape can be adjusted, and a high-quality sheet with high dimensional accuracy can be formed.

  2 to 6 show a second embodiment of the sheet forming apparatus of the present invention.

The sheet forming device, like the first embodiment, a material supply unit 1 for supplying the elastic material W, the material reservoir for temporarily storing the elastic material W supplied from the material supply part 1 3 and a material rolling section 2 for rolling the elastic material W stored in the material storage section 3.
Then, the sheet forming apparatus, a material pressing mechanism 4 for pressing over the pressure set in advance the elastic material W stored in the material reservoir portion 3 from the upper side provided, constituting the material pressing mechanism 4 The area of the material pressing surface 41a of the material pressing member 41 is set to 30 to 95% of the area of the upper opening 31 of the material storage unit 3, particularly 85 to 95% when it is necessary to prevent the elastic material from protruding. I am trying to set it.
Note that the same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

Material pressing mechanism 4 is an actuator 42 in which the material pressing member 41, made of a hydraulic cylinder for applying a pressure which is preset in the elastic material W stored material pressing surface 41a of the material pressing member 41 in the material reservoir 3 And a link mechanism 43 that transmits the force of the actuator 42 to the material pressing member 41.
In this embodiment, as shown in FIG. 2 to FIG. 3, the actuator 42 is disposed on the lower side of the sheet forming apparatus so that the material pressing member 41 can be completely opened from the material reservoir 3. The space above the upper opening 31 is effectively used, and the material storage unit 3 can be inspected and cleaned without disassembling the material pressing member 41 and without moving the rolls 21a and 21b. .
Further, by disposing the actuator 42 on the lower side of the sheet forming apparatus, it is possible to increase the arm ratio of the link mechanism 43 and reduce the thrust generated by the actuator 42.
Furthermore, by completely opening the material pressing member 41, it is possible to absorb a sudden change in the internal pressure of the material storage unit 3 regardless of the area ratio of the material pressing member 41 to the upper opening 31.
Thereby, for example, when an internal pressure exceeding the set value is generated in the material reservoir 3, the volume of the material reservoir 3 is increased and the internal pressure of the material reservoir 3 is decreased by the material pressing member 41 being raised. When the internal pressure rises further, the material pressing member 41 rises to the opening end of the upper opening 31 of the material reservoir 3, so that the upper portion of the material reservoir 3 is substantially opened. The elastic material W can be discharged out of the material storage unit 3, thereby preventing an accident such as damage to the apparatus more reliably.

On the other hand, this sheet forming apparatus controls the supply amount of the elastic material W by the material supply unit 1 and / or the discharge amount of the elastic material W by the material rolling unit 2 according to the position of the material pressing surface 41 a of the material pressing member 41. Operation control means (not shown) and the pressure of the actuator 42 of the material pressing mechanism 4 are kept at a low pressure that increases the rising responsiveness of the material pressing member 41 before the material rolling unit 2 is driven. pressure control means for maintaining the pressure set in advance after the drive has a (not shown) and.

The operation control means is the same as in the first embodiment, and according to the material pressing member 41 that moves up and down depending on the amount of elastic material W, the amount of elastic material W supplied by the material supply unit 1 and / or the material rolling unit 2 The discharge amount of the elastic material W is controlled.
On the other hand, the pressure control means ensures the control of the supply amount of the elastic material W by the operation control means by ensuring the rise of the material pressing member 41 by the elastic material W supplied in the initial stage of operation, and before the drive. Damage to the rolls 21a, 21b, etc. of the material rolling section 2 due to excessive supply is prevented.

Specifically, as shown in FIG. 4, at the initial stage of operation when sufficient elastic material W is not stored in the material storage unit 3, the elastic material is supplied to the material storage unit 3 while the rolls 21 a and 21 b are stopped. When W is filled and internal pressure is applied, and then the elastic material W accumulates in the material reservoir 3 and the material pressing member 41 rises, the position of the material pressing surface 41a of the material pressing member 41 is changed to the angle of the material pressing member 41. When the angle change of the material pressing member 41 (not particularly limited, for example, 10 ° in the present embodiment) occurs, it is detected by a proximity switch, an encoder, etc. By this detection signal, the operation of the rolls 21a and 21b is started, and the sheet can be pushed out in a state where the sheet shape is prepared from the beginning.
Thereby, the yield rate can be improved.
After the operation of the rolls 21a and 21b is started, the change in the angle of the material pressing member 41 is detected by a proximity switch, an encoder or the like, and the operation control means is operated by this detection signal to control the rotation speed of the screws 11a and 11b. To do.
In this case, normally, for the purpose of shortening the time, at the initial stage of operation, the screw rotation speed of the material supply unit 1 is set to a high speed (although it is not particularly limited, it is about 2 to 5 times the main speed during steady operation) In a steady state, the rotation speed of the screws 11a and 11b is switched to the main speed (low speed) so that the rated supply amount is obtained.
Thus, before the material rolling unit 2 is driven by the operation control means, the material supply amount by the material supply unit 1 is set to a high supply amount larger than the rated supply amount, and the position of the material pressing surface 41a of the material pressing member 41 is set. When starting the operation of the sheet forming apparatus by starting the driving of the material rolling unit 2 and setting the material supply amount of the material supply unit 1 to the rated supply amount. Since the material supply amount by the material supply unit 1 is set to a high supply amount while the driving of 2 is stopped, the elastic material W can be quickly filled into the empty material storage unit 3. Further, it is possible to detect that the elastic material W is completely filled in the material storage unit 3 by raising the position of the material pressing surface 41a of the material pressing member 41, and as a result, the driving of the material rolling unit 2 is started. By doing so, a high-quality sheet can be extruded from the beginning.
On the other hand, when the material pressing member 41 is pressed at a high pressure, the rising responsiveness deteriorates. In particular, when the material pressing member 41 does not rise despite the elastic material W being supplied, the operation control means There is a possibility that the rolls 21a and 21b may be damaged without being operated and being unable to switch the screw rotation speed.
In order to prevent this, the pressure until the start of operation of the rolls 21a and 21b is low (not particularly limited, but about 1/10 to 1/2 of the pressure during steady operation. In this embodiment, for example, 2 MPa ), The movement of the material pressing member 41 is made smooth, and the control by the operation control means is surely performed.

As shown in FIG. 5, in this embodiment, the side wall 33 of the material reservoir 3 is provided so as to be movable in the contact / separation direction, and the material pressing member 41 is formed to be extendable / contractible in the width direction.
Usually, when the material storage unit 3 is a closed type (closed bank type), the seat width is fixed for reasons of sealing performance.
On the other hand, in the present embodiment, the material pressing surface area of the material pressing member 41 is a part (30 to 95%) of the upper opening area of the material reservoir 3 and does not require perfect sealing performance. By changing the position of the side wall 33 of the material storage unit 3 and changing the dimension in the width direction of the material pressing surface 41a of the material pressing member 41, sheets having various width dimensions can be extruded.
In this case, as a mechanism for changing the dimension in the width direction of the material pressing surface 41a of the material pressing member 41, the material pressing extension member 41b can be attached to the material pressing member 41 so as to be movable in the width direction.
Accordingly, the dimension of the material pressing surface 41a of the material pressing member 41 in the direction perpendicular to the feeding direction of the elastic material W with respect to the dimension of the upper opening 31 is set to a predetermined value (not particularly limited, for example, 80 to 98%).

Moreover, like the modified example shown in FIG. 6, while omitting the cradle 32 provided in the bottom part of the material storage part 3 of the said Example, Of the two rolls 21a and 21b which comprise the material rolling part 2, The lower roll 21b is positioned adjacent to the material supply unit 1 so as to be positioned below the material pressing member 41 (the rotation axes of the two rolls 21a and 21b are the rotations of the screws 11a and 11b of the material supply unit 1). The material pressing member by being positioned in a plane inclined by an angle θ2 (in this modified embodiment, 25 °) in relation to a plane orthogonal to the plane including the axis) The elastic material W pressed by 41 can be supported by the lower roll 21b of the two rolls 21a and 21b constituting the material rolling section 2.
Thereby, the elastic material W of the material storage part 3 can be pressed against the lower roll 21b by the material pressing member 41, and the biting property of the elastic material W to the material rolling part 2 is improved, and at the end of the batch process. It is possible to prevent the elastic material W from remaining in the material reservoir 3.

  As described above, the sheet forming apparatus of the present invention has been described based on the embodiments thereof. However, the present invention is not limited to the configurations described in the above embodiments, and the configuration is appropriately changed without departing from the gist thereof. Is something that can be done.

  The sheet forming apparatus of the present invention eliminates fluctuations in the amount of elastic material delivered to the material rolling section, can shape the sheet, and can form a high-quality sheet with high dimensional accuracy. Since rapid fluctuations in internal pressure can be absorbed, it can be suitably used for a sheet forming apparatus for forming elastic rubber or plastic into a sheet shape.

It is explanatory drawing which shows 1st Example of the sheet forming apparatus of this invention. It is explanatory drawing which shows 2nd Example of the sheet forming apparatus of this invention. It is a top view which shows the material pressing mechanism of the sheet forming apparatus. It is explanatory drawing which shows operation | movement of the operation control means and pressure control means of the sheet forming apparatus. It is sectional drawing which shows the material storage part of the sheet forming apparatus. It is explanatory drawing which shows the modification which abbreviate | omitted the receiving stand in the sheet forming apparatus. It is explanatory drawing which shows the conventional sheet forming apparatus.

DESCRIPTION OF SYMBOLS 1 Material supply part 11a Screw 11b Screw 2 Material rolling part 3 Material storage part 31 Upper opening part 32 Base 4 Material pressing mechanism 41 Material pressing member 41a Material pressing surface 41b Material pressing extension member 42 Actuator 43 Link mechanism W Elastic material

Claims (6)

A material supply unit for supplying the elastic material, a material reservoir for temporarily storing the elastic material supplied from the material supply unit, the elastic material stored in the material reservoir rolled sheet in the sheet forming apparatus that includes a material rolling portion for molding a Jo, a material pressing mechanism for pressing over the pressure set in advance the elastic material stored in the material reservoir from above is provided, The material pressing mechanism includes a material pressing member, an actuator for applying a preset pressure to the elastic material stored in the material storage portion from the material pressing surface of the material pressing member, and the force of the actuator to the material pressing member consists of a link mechanism for transmitting, wherein the set at 30-95% of the area of the upper opening area of the material reservoir of the material pressing surface of the material pressing member constituting the material pressing mechanism Sea Molding apparatus. The operation control means for controlling the supply amount of the elastic material by the material supply unit and / or the discharge amount of the elastic material by the material rolling unit according to the position of the material pressing surface of the material pressing member. sheet forming apparatus as claimed in 1. When the operation control means sets the material supply amount by the material supply unit to a high supply amount larger than the rated supply amount before driving the material rolling unit and the position of the material pressing surface of the material pressing member rises, material rolling The sheet forming apparatus according to claim 2 , wherein the driving of the unit is started and the material supply amount of the material supply unit is set to a rated supply amount. It pressure of the material pressing mechanism, together with the previous drive of the material the rolling portion is held in a low pressure to increase the responsiveness of the material pressing member is increased, with a pressure control means for maintaining the pressure set in advance after the driving of the material rolled portion The sheet forming apparatus according to claim 1, 2, or 3 . The side wall of the material reservoir provided with movably in the contact and separation direction, sheet forming apparatus according to claim 1, 2, 3 or 4, characterized in that the expandable form the material pressing member in the width direction. Claim 1, 2, 3, 4 or 5, characterized in that so as to support below the rolls of the pair of upper and lower rolls of the resilient material is pressed by the material pressing member constituting the material rolled portion Sheet forming equipment.