JP2000037778A - Method and apparatus for producing resin-molded- product integrated sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deformation of a resin molded product in a cooling process at the time of production of a resin molded product integrated sheet. SOLUTION: A resin molded product 1 is integrated with a sheet 3 supplied in a longitudinal direction by an integrating mechanism 6 and this resin molded product 1 integrated with the sheet 3 is solidified while cooled in a cooling feed region 60 and, in the solidifying process in this cooling feed region 6, the sheet 3 and the resin molded product 1 are tensioned between the feed-out mechanism 8 provided on the downstream side of the cooling feed region in the supply direction of the sheet and the integrating mechanism 6. By this constitution, since the resin molded product 1 is tensioned between the integrating mechanism 6 and the feed-out mechanism 8 in the cooling process, the deformation thereof caused by heat shrinkage is not generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a resin molded product integrated sheet and an apparatus for manufacturing the same.

[0002]

2. Description of the Related Art As means for integrating a resin molded product with an edge portion of a sheet such as a cotton cloth material, a method disclosed in JP-A-8-6696 is known.
No. 5. This involves feeding a long sheet while feeding it out of a drum, extruding an elongated rod-shaped resin molded product softened by heating from an extruder, and inserting the edge of the sheet into the groove of the resin molded product. The groove is closed by compressing the insertion portion, thereby integrating the sheet and the resin molded product. Then, the integrated sheet and the resin molded product are cooled while being supplied in the longitudinal direction to solidify the resin molded product, and then cut into a predetermined length.

[0003]

Generally, in the process of cooling a resin molded product that has been softened by heating, the heat shrinkage tends to be uneven on the cross section of the resin molded product. Therefore, there is a risk that the linear bar-shaped resin molded product may be curved and deformed in the course of cooling. The present invention has been made in view of the above circumstances, and has an object to prevent deformation of a resin molded product in a cooling process.

[0004]

According to the first aspect of the present invention, a resin sheet is integrated with a long sheet while supplying the sheet in the longitudinal direction, and the resin sheet integrated with the sheet is cooled. A method for producing a resin molded product integrated sheet that is solidified by the following steps: after the sheet and the resin molded product are integrated by an integration mechanism, the resin molded product integrated with the sheet is cooled in a cooling feed area. In the solidifying step in the cooling feed area, the sheet and the resin that have been integrated with the feeding mechanism provided downstream of the cooling feed area in the sheet supply direction and the integrated mechanism are cooled. The molded product is configured to be strained.

According to a second aspect of the present invention, while a long sheet is supplied in a longitudinal direction, a resin molded product is integrated with the sheet.
An apparatus for manufacturing a resin-molded product integrated sheet in which a resin-molded product integrated with the sheet is solidified by cooling, wherein the sheet is more integrated than an integrated mechanism for integrating the sheet and the resin-molded product. On the downstream side in the supply direction, a cooling feed area for solidifying the resin molded product integrated with the sheet is provided, and on the downstream side in the sheet supply direction from the cooling feed area, the cooling integrated area is provided. A delivery mechanism for delivering the sheet and the resin molded product while tensioning the same between the integrated mechanism and the sheet is provided.

According to a third aspect of the present invention, in the second aspect of the invention, the delivery mechanism is constituted by a pair of belt conveyors for sandwiching the integrated sheet and a resin molded product.

[0007]

According to the first and second aspects of the present invention, the integrated sheet and the resin molded product are moved between the integration mechanism and the delivery mechanism in a cooling step for solidifying the resin molded product. As a result, deformation due to heat shrinkage is prevented.

[Invention of claim 3] Even if the integrated sheet and the resin molded article are deformed, the deformation is corrected by being sandwiched between a pair of belt conveyors.

[0009]

[First Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. The apparatus for manufacturing a resin molded product integrated sheet of the present embodiment includes:
As shown in FIG. 1, an extrusion molding machine 2 for extruding and molding a resin molded product 1, a sheet feeding device 5 for sequentially supplying a sheet 3 of a predetermined width made of a cold gauze or a cotton cloth material, and integrating the sheet 3 and the resin molded product 1 Integrated mechanism 6 for making
It comprises a feeding mechanism 8 for feeding out the resin molded product integrated sheet 7, and a cutting device 10. The extrusion molding machine 2 is a general one used for molding the rod-shaped resin molded product 1, and has a configuration in which a softened resin is extruded from an extrusion port 12 through a mold 11. The resin molded product 1 extruded through the mold 11 is formed with a sheet insertion groove (not shown) to be fitted to a side edge of the sheet 3. In addition, vinyl chloride, polypropylene, or the like is used as the resin. A feed roller 14 rotatable around a vertical axis is provided in front of an extrusion port 12 of the extruder 2.
Is provided, and the resin molded product 1 extruded from the extruder 2 is in contact with the side peripheral surface thereof.
The feed roller 14 is connected to the drive motor 1 via a belt 15.
6 and is driven to rotate in one direction by the drive of a drive motor 16. Further, a feed roller 17 rotatable around a vertical axis is provided on the base plate 18 in front of the feed roller 14, and the feed roller 17 is set at substantially the same height position as the feed roller 14. . The resin molded product 1 extruded from the extruder 2 is slightly deflected by being brought into contact with the side peripheral surface of the feed roller 17 and is sent toward the integration mechanism 6.

The unifying mechanism 6 is provided with four pairs of compression rollers 21 on the front surface of a roller mounting plate 20 erected on the base plate 18, and the four pairs of compression rollers 21 are arranged horizontally. They are arranged side by side at a predetermined interval. The compression rollers 21 of each pair are provided to face each other up and down, and their roller surfaces are in contact with each other.
Is almost the same as the height position. A compression groove 21a having a substantially U-shaped cross section is provided on the side peripheral surface on the distal end side of each compression roller 21. This allows the resin molded article 1 to pass between the upper and lower compression rollers 21 while being compressed. Can be compressed hole
(Not shown) are formed. Among the four pairs of compression rollers 21, the one formed between the pair of compression rollers 21 closest to the extruder 2 is the widest, and the compression hole is the widest, and as it goes downstream (rightward in FIG. 1), It is gradually narrowing. A drive motor 22 is provided on the rear side of the roller mounting plate 20, and drives each compression roller 21 via a belt 23.

On the other hand, the sheet feeding device 5 is provided with a roll portion 24 in which the belt-shaped sheet 3 is wound in a roll shape, and the sheet 3 is fed from the roll portion 24 by guide pins 25 in a horizontal state. It is supposed to be.
A guide mounting plate 26 is provided in front of the roller mounting plate 20 at a distance substantially equal to the width of the sheet 3. A guide bar 27 having a U-shaped cross section is mounted on a surface of the guide mounting plate 26 facing the roller mounting plate 20 with its opening facing the roller mounting plate 20 side. The mounting height of the guide bar 27 is substantially equal to the contact position between the compression rollers 21 provided above and below.

A delivery mechanism 8 disposed downstream of the integration mechanism 6 in the sheet supply direction includes a pair of upper and lower belt conveyors 31 on the front surface of a mounting block 30 erected on a base 28.
It is provided with. Each belt conveyor 31 has a configuration in which an endless belt 35 is stretched between a driving roller 32 and a driven roller 33 horizontally supported on the front surface of the mounting block 30. Lower surface of belt conveyor 31 and lower belt conveyor 3
1 is in contact with the upper surface, and the contact position is substantially equal to the contact position between the upper and lower compression rollers 21 of the integration mechanism 6. Both belt conveyors 31 are provided with drive motors 36 mounted on the back of the mounting block 30.
2 (see FIG. 2), the respective drive rollers 32 are driven to rotate in opposite directions to each other, whereby the resin molded product integrated sheet 7 sandwiched between the contact portions of both endless belts 35 is cut. It is sent out to the device 10. Further, an encoder 37 mounted on the back surface of the mounting block 30 is connected to a rotating shaft end of a driven roller 33 of one belt conveyor 31.

The cutting device 10 disposed downstream of the feeding mechanism 8 in the sheet supply direction includes a pair of upper and lower sandwiching rollers 38 for sandwiching the resin molded product integrated sheet 7, and a cutter mechanism 4.
0. The pair of holding rollers 38
It is supported on a support block 41 of the base 28 via a bracket 43 fixed to the back surface thereof, and the contact surface between the two nipping rollers 38 is at the contact position between the pair of belt conveyors 31 of the delivery mechanism 8. The height is almost equal to.

The cutter mechanism 40 includes a cutter 44, a clutch 45, and a stopper mechanism 46. As shown in FIG. 2, the clutch 45 is provided with its driven shaft 47 along the running direction of the resin molded product integrated sheet 7, and the cutter 44 is fixed to the driven shaft 47. The clutch 45 is connected to the drive motor 4
8 via a belt 50 and the drive motor 4
8, the driving force is not transmitted to the driven shaft 47 when the clutch disc 51 at the end thereof is overloaded, so that the cutter 44 is not driven to rotate. It has become.

Overloading the clutch board 51 is an engaging bar 52 constituting the above-mentioned stopper mechanism 46, and the lower end of the engaging bar 52 can swing on a bracket 53 on the base 28. , And an upper edge thereof can be engaged with a locking portion 51 a formed on the outer periphery of the clutch disc 51. At the center of the engaging bar 52, a base end is attached to the base 28.
The tip of a rod 56 of an air cylinder 55 supported by the upper bracket 54 is axially connected. As shown by the solid lines in FIGS. 4 and 3, the upper edge of the engagement bar 52 is
In the state of being engaged with the first locking portion 51a, the driven shaft 47 of the clutch 45 does not rotate even if the driving force is transmitted to the clutch 45 by the driving motor 48, and thus the cutter 44 is in the posture shown in FIG. It is kept stopped. Here, when the rod 56 is protruded by the driving command of the air cylinder 55, the engagement bar 52 is rocked and the upper end edge thereof is moved from the locking portion 51a of the clutch disc 51 as shown by the imaginary line in FIG. Come off. Thereby, the clutch board 51
Since the overloaded state is released, the cutter 44 is released.
Rotates together with the driven shaft 47, and the resin molded product integrated sheet 7 is cut.

In the above operation, immediately after the upper end edge of the engaging bar 52 is disengaged from the engaging portion 51a of the clutch disc 51, a command to return the air cylinder 55 is issued.
Is urged toward the return position (the solid line position in FIG. 3), so that the locking portion 51a of the clutch disc 51 is engaged with the upper end edge of the engagement bar 52 at the time when the cutter 44 makes one rotation. 4
4 stops. The encoder 37 provided in the delivery mechanism 8 is connected to a controller (not shown), and a rotation amount signal of the driven roller 33 is input to the controller. The controller is capable of inputting and setting the cutting length of the resin molded product integrated sheet 7 as a digital value from an operation panel thereof. The controller obtains the setting value and a calculation based on the rotation amount signal of the driven roller 33. When the actual feed value of the integrated resin molded product sheet 7 matches, the driving command of the air cylinder 55 of the cutter mechanism 40 is sent.

Next, the operation of the present embodiment will be described. When the resin molded article 1 is extruded from the extrusion molding machine 2, the resin molded article 1 is sent out by a feed roller 14, slightly deflected by a feed roller 17 in a still soft state, and sent to the integration mechanism 6. On the other hand, one end of the sheet 3 supplied from the sheet supply device 5 is inserted into the sheet insertion groove of the resin molded product 1 at the feed roller 17, and the other end is integrated while being guided by the guide bar 27. It is sent to the mechanism 6. The resin molded product 1 and the sheet 3 sent to the integration mechanism 6 are sent while the portion of the resin molded product 1 is compressed by the compression grooves 21 a of the respective compression rollers 21, whereby the resin molded product 1 and the sheet 3 Are sent to the sending mechanism 8 while the integration of the two is performed. Here, the resin molded product 1 immediately after being sent out from the integration mechanism 6 has not yet been completely cooled.

The integrated resin molded article 1 and the sheet 3 are sent to the cutting device 10 while being sandwiched between the belt conveyors 31 above and below the sending mechanism 8. A predetermined space is provided between the mechanism 6 and the mechanism 6, and this portion is a cooling feed area 60. In the process of passing through the cooling feed area 60, the resin molded article 1 is completely cooled while being kept in a tensioned state between the integration mechanism 6 and the delivery mechanism 8, and reaches the cutting device 10. At this point, the resin molded product integrated sheet 7 is completed.

The resin molded product integrated sheet 7 which has reached the cutting device 10 is transported while being supported and supported by a pair of upper and lower sandwiching rollers 38, and is taken up by a take-up mechanism (not shown) downstream thereof. Each time the resin molded product integrated sheet 7 is fed by a preset cutting length, the cutter 44 makes one rotation by the above operation, and the resin molded product integrated sheet 7 is cut to the set length. As described above, according to the present embodiment, the sheet 3 and the resin molded product 1
Since the resin-molded product integrated sheet 7 is integrated between the integration mechanism 6 and the delivery mechanism 8 in the cooling feed region 60 for solidifying the resin-molded product 1, Deformation due to heat shrinkage is prevented.
Even if the resin molded product integrated sheet 7 is deformed, the deformation is corrected by being sandwiched between the pair of belt conveyors 31.

Further, since the cutting length of the resin molded product integrated sheet 7 is set as a digital value and the cutting mechanism 40 is controlled by digital signal processing, there is an advantage that the accuracy of the cutting dimension is improved. Further, the cutter 44 of the cutting mechanism 40 is driven by a mechanism in which the driving motor 48, the clutch 45 and the stopper mechanism 46 are combined. Is improving. Therefore, even when the feed speed of the resin molded product integrated sheet 7 is increased, it is possible to make the cut size smaller than in the conventional apparatus.

[Other Embodiments] The present invention is not limited to the embodiment described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) In the above embodiment, the operation of the cutter for cutting the resin molded product integrated sheet is controlled based on a signal from an encoder provided in the sending mechanism. A sensor for detecting the position of the cutting edge of the product integrated sheet may be provided, and the operation of the cutter may be controlled based on a detection signal from the sensor.

(2) In the above embodiment, the delivery mechanism is constituted by a pair of belt conveyors. However, according to the present invention, another mechanism such as a roller conveyor may be used. (3) In the above embodiment, the cutter performs cutting while rotating with the drive motor as the drive source. However, according to the present invention, the rotational drive force of the drive motor is converted into linear motion,
The cutting may be performed by reciprocating the cutter in a straight line by means such as utilizing the forward and backward movement of the rod of the air cylinder.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entirety of a first embodiment.

FIG. 2 is a top view of a delivery mechanism and a cutting device according to the first embodiment.

FIG. 3 is a side view of the cutting device according to the first embodiment.

FIG. 4 is a perspective view of the cutting device according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Resin molded article 3 ... Sheet 6 ... Integration mechanism 7 ... Resin molded article integrated sheet 8 ... Sending mechanism 31 ... Belt conveyor 60 ... Cooling feed area

Claims (3)

[Claims] 1. Production of a resin molded product integrated sheet wherein a resin molded product is integrated with the sheet while a long sheet is supplied in the longitudinal direction, and the resin molded product integrated with the sheet is solidified by cooling. A method wherein the sheet and the resin molded article are integrated by an integration mechanism, and then the resin molded article integrated with the sheet is solidified while being cooled in a cooling feed area; In the solidification step, the integrated sheet and the resin molded product are tensioned between a delivery mechanism provided on the sheet supply direction downstream side of the cooling feed area and the integration mechanism. A method of manufacturing a molded product integrated sheet. 2. A resin molded product integration wherein a resin molded product is integrated with the sheet while supplying a long sheet in the longitudinal direction, and the resin molded product integrated with the sheet is solidified by cooling. A sheet manufacturing apparatus, comprising: a cooling device for solidifying the resin molded product integrated with the sheet downstream of an integration mechanism for integrating the sheet and the resin molded product in a sheet supply direction. A feeding area is provided, and a sheet feeding direction downstream of the cooling feeding area is
An apparatus for producing an integrated resin molded product sheet, comprising a delivery mechanism for delivering the integrated sheet and the resin molded product while tensioning the integrated product with the integration mechanism. 3. The integrated resin molded article production sheet according to claim 2, wherein said delivery mechanism is constituted by a pair of belt conveyors sandwiching said integrated sheet and said resin molded article. apparatus.