JP2000185348A - Apparatus and method for molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide apparatus and method for molding capable of improving productivity with a compact structure. SOLUTION: An object 1 to be molded is heated by a heater 3, and then moved to a waving unit 4. The object 1 is molded in waveshape by waving roller units 40, 41, 42, 43, 44 and 45, and a waveshape states are held therebetween. Simultaneously, the object 1 is cooled with cooling water passing through the units 40, 41, 42, 43, 44 and 45 and air injected from air blowing units 41, 48 and 49. As a result, the object 1 is rapidly cooled, and its cooling effect is further improved. Disorders in fine protrusion and recess or waveform shape are eliminated on a surface of the object 1 to stabilize the waving step and to prevent a molding fault.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus and a molding method for molding while moving an object to be molded, and more particularly to a molding apparatus and a molding method for molding a continuous sheet of synthetic resin into a corrugated sheet. It is.

[0002]

2. Description of the Related Art Conventionally, there has been known a forming apparatus for forming a plate-shaped continuous body into a corrugated shape by a pair of upper and lower corrugating rollers arranged in a running direction of the plate-shaped continuous body. This molding apparatus sandwiches a plate-shaped continuous body heated to a predetermined molding temperature in a previous step between a pair of upper and lower corrugating rollers, and cools the plate-shaped continuous body while holding it in a waveform,
This plate-shaped continuous body is continuously formed into a corrugated product. This forming apparatus cools the plate-shaped continuous body by spraying water on the plate-shaped continuous body after corrugating, or cools the plate-shaped continuous body with water passing through the corrugating roller at the time of corrugating (at the time of forming).

[0003]

When water is sprayed on a plate-shaped continuum to cool it, water stays in the upper portion of the plate-shaped continuum, and the cooling becomes uneven or the surface of the plate-shaped continuity becomes uneven. Fine irregularities could be generated. For this reason, the wave shape is likely to be disturbed and unstable, and it has been impossible to perform corrugation molding by mass production. Further, when cooling the plate-shaped continuous body by the corrugating rollers, a large number of corrugating rolls are required. For example, in the case of a corrugated sheet of polyvinyl chloride (PVC), when the processing amount is about 600 kg / h, about 10 pairs of corrugating rollers are required. For this reason, the molding process is lengthened, and the installation cost of the molding device is high.

An object of the present invention is to provide a molding apparatus and a molding method which are compact and can improve productivity.

[0005]

The present invention solves the above-mentioned problems by the following means. That is, the invention according to claim 1 is a molding apparatus for molding while moving a molding object, wherein a plurality of heating means are provided along a traveling direction of the molding object, the heating means for heating the molding object to a predetermined molding temperature. A molding cooling roller for forming and cooling the molding object while being in rotational contact with the molding object while pressing the molding object, and a molding cooling roller provided between the molding cooling roller and supplying gas to the molding object. An air nozzle for spraying and cooling the object to be molded.

According to a second aspect of the present invention, in the molding apparatus according to the first aspect, the air nozzle is a plate-like member, and has a slit shape along a direction substantially perpendicular to a traveling direction of the molding object. A molding apparatus having an ejection port.

According to a third aspect of the present invention, there is provided a molding method for molding while moving the molding object, wherein a heating step of heating the molding object to a predetermined molding temperature, and after the heating step, the molding object is heated. A molding and cooling step of molding and cooling the molding object while pressing, and blowing a gas to the molding object to cool the molding object.

According to a fourth aspect of the present invention, in the molding method according to the third aspect, a plurality of the forming cooling steps are provided along a running direction of the forming object, and the forming cooling step is in rotational contact with the forming object. The molding method is characterized in that the molding object is formed and cooled by a roller, and the molding object is cooled by an air nozzle provided between the molding and cooling rollers.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) Hereinafter, a first embodiment of the present invention will be described in more detail with reference to the drawings. Hereinafter, a case where the molding apparatus according to the first embodiment of the present invention is applied to a corrugating step of a synthetic resin corrugated sheet will be described as an example. FIG. 1 is a front view of a molding apparatus according to the first embodiment of the present invention, FIG. 2 is a plan view of the molding apparatus according to the first embodiment of the present invention, and FIG. It is a side view of the molding device concerning one embodiment.

The molding object 1 is, for example, a plate-like continuous body made of a thermoplastic resin such as polyvinyl chloride (PVC) resin. As shown in FIGS. Is sent.

The forming apparatus 2 is an apparatus for continuously forming the object 1 into a corrugated product while moving the object 1 in the direction A. The forming device 2 includes a heating device 3, a corrugating device 4, a cutting and accumulating device 5, and a base 6. The heating device 3 is configured to perform corrugating forming on the forming object 1. This is a device for heating the molding target 1 to a predetermined molding temperature.

The corrugating device 4 forms and cools the molding object 1 while pressurizing the molding object 1 heated by the heating device 3, and blows air to the molding object 1. This is a device for cooling the molding target 1. The corrugating device 4 includes corrugating roller units 40 and 4.
1, 42, 43, 44, 45 and a roller driving device 46
And air blow units 47, 48, and 49. The corrugating device 4 includes a corrugating roller 40.
a, 41a, 42a, 43a, 44a, 45a and corrugating rollers 40b, 41b, 42b, 43b, 44b, 4
5b, the molding object 1 is sandwiched, and the molding object 1 is formed into a waveform and held.

The corrugating roller units 40 to 4
Reference numeral 5 denotes a unit for molding and cooling the object 1 while applying pressure, and is provided along the running direction of the object 1. Since the corrugated roller units 40 to 45 have substantially the same structure, the corrugated roller unit 43 will be mainly described below. The corrugating roller unit 43 includes, as shown in FIG.
3b, cylinders 43c and 43d, and joint 43
e, 43f and bearings 43g, 43h, 43i, 43j
And columns 43k and 43m.

The corrugating rollers 43a and 43b are rotating bodies that are in rotational contact with the molding object 1 to form and cool the molding object 1 into a waveform. The corrugating roller 43a is disposed on the upper surface side of the molding target 1, and the other corrugating roller 43b is disposed on the lower surface side of the molding target 1, and sandwiches the molding target 1 therebetween. . The corrugating rollers 43a and 43b are formed so as to allow cooling water for cooling the molding object 1 to pass through the corrugating rollers 43a and 43b. As shown in FIG.
Irregularities (waves) are formed on the entire outer peripheral portion. In addition,
Corrugating rollers 40a, 40b, 41a, 41b, 42
In both a and 42b, irregularities are formed only on a part (central portion) of these outer peripheral surfaces, and irregularities gradually increase in the width direction (roller axis direction) of the molding target 1 in order from the upstream side. It is formed to increase.

The cylinders 43c and 43d are members for pressing the corrugating roller 43a against the corrugating roller 43b to adjust the pressing force between the corrugating rollers 43a and 43b. The joint 43e connects the tip of the cylinder 43c and the bearing 40g,
3f connects the tip of the cylinder 43d and the bearing 43h. These bearings 43g and 43h are provided with corrugated rollers 4
3a is rotatably supported, and the bearings 43i and 43j rotatably support the corrugating roller 43b. In addition, support column 43
k supports the cylinder 43c and the bearing 43i,
3m supports the cylinder 43d and the bearing 43j.

The roller driving device 46 is a device for rotationally driving the corrugating rollers 40a to 45a, and includes a driving motor 46a, transmission chains 46b and 46c, and sprockets 46d, 46e and 46f.

The drive motor 46a is an electric motor for drawing the object 1 into the molding apparatus 4, and has a drive shaft to which a sprocket 46d is attached. The transmission chain 46b is connected to the drive motor 46a.
Is a member that transmits the generated power to the corrugating rollers 40b to 45b, and is wound around a sprocket 46e and a sprocket 46d attached to the corrugating rollers 45b. The transmission chain 46c includes the corrugating roller 4
This is a member for rotating 0b to 45b at the same angular velocity, and is wound around a sprocket 46f attached to the corrugating rollers 40b to 45b.

The aforementioned air blow units 47 to 49
Is a unit that blows air to the molding object 1 to cool the molding object 1. As shown in FIGS. 1 and 2, the air blow unit 47 is provided between the corrugating roller unit 43 and the corrugating roller unit 44, and the air blow unit 48 includes the corrugating roller unit 44 and the corrugating roller unit 45. And is provided downstream of the corrugating roller unit 46. Since the air blow units 47 to 49 have substantially the same structure, the following description focuses on the air blow unit 48. The air blow unit 48 includes an air nozzle 48
a, 48b, air flow control valves 48c, 48d, an air compressor 48e, and a pipeline 48f.

FIG. 4 is a detailed view of an air nozzle portion in the molding apparatus according to the first embodiment of the present invention. FIG.
It is a figure which expands and shows the V part of FIG. The air nozzles 48a and 48b are flat, plate-like members that blow out air from pores formed at the tips, and blow out air at a temperature of about 30 ° C. or less. These air nozzles 48a, 48b
Are formed with slit-shaped ejection ports 480a and 480b on the surface (opposing surface) on the side facing the molding object 1. Further, the air nozzles 48a and 48b are continuously arranged in a plurality in the width direction of the molding object 1 so that the longitudinal direction of the facing surface and the direction (width direction) orthogonal to the traveling direction of the molding object 1 coincide. Are lined up. The air nozzle 48a is disposed above the molding object 1 at a predetermined interval from the upper surface of the molding object 1, and the other air nozzle 48b is arranged at a predetermined distance from the lower surface of the molding object 1. Open,
It is arranged below the molding object 1. In addition, as shown in FIG. 1, the air nozzles 48a and 48b are formed at an angle of 5 to 10 degrees with respect to the vertical direction in order to prevent turbulent air flow.
It is arranged at an angle.

These air nozzles 48a and 48b prevent deformation of the molding object 1 due to the air jetting power, and
In order to prevent the molding object 1 from coming into contact with the tip of the nozzle and damaging the surface of the molding object 1, air with a wind speed of about 5 to 10 m / s is ejected in the traveling direction of the molding object 1. .
The corrugating rollers 40a, 40b, 41a, 41b,
As shown in FIG. 2, the protrusions 42 a and 42 b have irregularities only in the central portion, and both ends do not contact the molding target 1. As a result, the corrugating rollers 40a, 40b, 41a,
Due to 41b, 42a, and 42b, only the central portion of the molding target 1 is cooled, and the temperature of the central portion of the molding target 1 is lower than the temperatures of both ends. For this purpose, the air nozzle 4
7a and 47b are air nozzles 48 as shown in FIG.
Unlike a, 48b, 49a, and 49b, only the widthwise ends of the molding target 1 are cooled, and the corrugated roller unit 43 and the corrugating roller unit 44 are cooled in the width direction of the molding target 1. Make the temperature uniform.

The air volume adjusting valves 48c and 48d are for adjusting the amount of air jetted by the air nozzles 48a and 48b, and are provided in the pipes 48f one by one corresponding to the respective air nozzles 48a and 48b. Further, the air compressor 48e includes air nozzles 48a, 48
b is a device for supplying compressed air to the pipeline 40
f denotes an air compressor 48e and air nozzles 48a, 4
8b.

The cutting and accumulating device 5 shown in FIGS. 1 and 2 is a shaping device 1 formed into a waveform by the corrugating device 4.
Is a device for cutting a sheet and accumulating sheet-like corrugated products. The base 6 is a member for fixing the corrugating roller units 40 to 45 and the air blow units 47 to 49.
The base 6 includes columns 40k and 40m, a driving motor 46a,
The air compressor 48e is supported.

Next, the operation of the molding apparatus according to the first embodiment of the present invention will be described. After being heated by the heating device 3, the molding target 1 moves to the corrugating device 4. The forming object 1 is sequentially sandwiched between the corrugating rollers 40a to 45a and the corrugating rollers 40b to 45b to be formed into a waveform, and the state of the waveform is maintained therebetween.
At the same time, the molding object 1 is
45 and the air blow units 47 to
49 is cooled by the jetted air. After the molding object 1 is molded and cooled by the corrugating device 4,
It moves to the cutting and stacking device 5. The forming object 1 is cut into a predetermined size by the cutting and stacking device 5 and is stacked.

The molding apparatus according to the first embodiment of the present invention comprises:
It has the effects described below. (1) In the first embodiment of the present invention, the corrugating roller units 40 to 45 press and compress the molding target 1 into a corrugated shape and cool it, and the air blow units 47 to 49 blow gas onto the molding target 1. And cool. For this reason, the molding object 1 can be cooled rapidly, and the cooling effect of the molding object 1 can be further improved. In addition, since water does not stay on the surface of the molding target 1, fine irregularities and irregularities in the corrugated shape are eliminated, so that the corrugating step is stabilized and molding defects can be prevented.

(2) In the first embodiment of the present invention, corrugating roller units 40 to 45 are provided along the running direction of the molding target 1, and air blow units 47 to 49 are provided between them. ing. For this reason, the shortage of the cooling effect by the corrugating roller units 40 to 45 can be compensated for by the air blow units 47 to 49.
As a result, the number of corrugated roller units 40 to 45 installed is reduced, and the length of the forming device 2 in the running direction of the forming target 1 is reduced. Further, the compacting and simplification of the molding device 2 can be achieved, and the facility cost can be reduced. Furthermore, the installation space of the molding device 2 is reduced, and the limited space in the factory can be effectively used for other purposes.

(3) In the first embodiment of the present invention, a large number of jet ports 480a, 480b are formed on the surfaces (opposing surfaces) of the air nozzles 48a, 48b on the side facing the molding object 1. The plurality of air nozzles 48a, 4a are arranged such that the longitudinal direction of the surface coincides with the width direction of the molding target 1.
8b are continuously arranged. For this reason, the molding object 1 can be cooled sufficiently and uniformly.

(4) In the first embodiment of the present invention, the corrugating rollers 40a, 40b, 41a, 41b, 42 on the upstream side are used.
The irregularities gradually increase in the width direction of the molding target 1 in order from a and 42b. For this purpose, a pair of corrugating rollers 4
Oa and 40b make it possible to reduce the elongation in the width direction of the molding object 1 and to make the thickness of the molding object 1 uniform, as compared with the case where the unevenness is formed in the width direction of the molding object 1 at one time. .

(5) In the first embodiment of the present invention, a plurality of air nozzles 48a,
48b are continuously arranged, and the air volume adjusting valves 48c, 4 correspond to the respective air nozzles 48a, 48b.
8d are provided one by one. For this purpose, the molding target 1 is partitioned in the width direction, and the air volume adjusting valves 48c, 48d
The temperature can be adjusted for each section by changing the air volume. As a result, even if heating in the width direction of the molding target 1 is not uniform, the molding target 1 can be cooled uniformly.

[0029]

EXAMPLE A molding object 2 made of polyvinyl chloride resin was processed at a processing rate of about 600 kg / h, a thickness of 0.8 mm and a product width of 660 m by a molding apparatus 2 according to a first embodiment of the present invention.
m, a corrugated plate pitch of 32.1 mm, and a valley depth of 8 mm were formed into corrugated plates (Examples). After the molding object 1 was heated at a temperature of 140 ° C. by the heating device 3, air at an ejection speed of 7 m / s and a temperature of 25 ° C. was ejected to the molding object 1. As a result, a sufficient cooling effect could be obtained at a temperature of 35 ° C. by the molding apparatus 2. In the examples, no irregularities in the wave shape and no irregularities on the surface were observed.

An object to be molded made of polyvinyl chloride resin was molded into a corrugated sheet (comparative example) and cooled by a molding apparatus that omitted cooling by air and allowed water to flow only through a corrugating roller. As a result, the temperature of the object to be molded was 80 ° C. at the outlet of the corrugating step, and the molding was impossible due to insufficient cooling. As in the example, at the exit of the corrugating step, 10 corrugating rollers were required to bring the molding object to a temperature of 35 ° C. As described above, the number of the corrugating roller units 40 to 45 can be reduced to about half in the embodiment as compared with the comparative example, so that the manufacturing cost of the molding apparatus 2 can be reduced.

(Other Embodiments) The present invention is not limited to the above-described embodiments, and various modifications or changes can be made as described below, and these are within the scope of the present invention. It is. (1) In the embodiment of the present invention, the molding target 1 which is a plate-like continuous body (web) has been described as an example, but the present invention is also applicable to a sheet.

(2) In the embodiment of the present invention, the corrugating device 3 including six pairs of corrugating roller units 40 to 45 and three pairs of air blow units 47 to 49 has been described as an example. It is not limited to. The number of corrugated roller units and air blow units to be attached can be changed according to the molding processing amount, the molding shape, and the heating temperature of the molding target 1 by the heating device 3. Further, a heating device may be built in the roller units 40 to 42.

[0033]

As described above in detail, according to the present invention, the object to be molded is heated to a predetermined molding temperature, and while the object to be molded is pressurized, the object to be molded is cooled and cooled. Since the molding object is cooled by blowing a gas to the molding object, the apparatus can be made compact and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a molding apparatus according to a first embodiment of the present invention.

FIG. 2 is a plan view of the molding apparatus according to the first embodiment of the present invention.

FIG. 3 is a side view of the molding apparatus according to the first embodiment of the present invention.

FIG. 4 is a detailed view of an air nozzle portion of the molding device according to the first embodiment of the present invention.

FIG. 5 is an enlarged view showing a portion V in FIG. 4;

[Explanation of symbols]

REFERENCE SIGNS LIST 1 molding object 2 molding device 3 heating device 4 corrugating device 5 cutting and accumulating device 40, 41, 42, 43, 44, 45 corrugating roller units 40a, 40b, 41a, 41b, 42a, 42b, 4
3a, 43b, 44a, 44b, 45a, 45b Corrugated roller 46 Roller driving device 47, 48, 49 Air blow unit 47a, 47b, 48a, 48b, 49a, 49b Air nozzle

Claims (4)

[Claims] 1. A molding apparatus for molding while moving an object to be molded, comprising: heating means for heating the object to be molded at a predetermined molding temperature; and a plurality of heating means provided along a traveling direction of the object to be molded. A forming cooling roller that forms and cools the forming object by rotatingly contacting the forming object while pressing the object, and is provided between the forming cooling rollers, and blows gas to the forming object. An air nozzle for cooling an object to be formed; 2. The molding apparatus according to claim 1, wherein the air nozzle is a plate-shaped member, and has a slit-shaped ejection port along a direction substantially perpendicular to a traveling direction of the molding target. A molding apparatus characterized by the above-mentioned. 3. A molding method for molding while moving a molding object, wherein a heating step of heating the molding object to a predetermined molding temperature, and after the heating step, the molding object is heated while heating the molding object. A molding and cooling step of molding and cooling the object, and blowing a gas onto the object to cool the object. 4. The forming method according to claim 3, wherein a plurality of the forming and cooling steps are provided along a running direction of the forming object, and the forming and cooling step is performed by a forming and cooling roller that is in rotational contact with the forming object. Molding and cooling the object,
A forming step of cooling the forming object by an air nozzle provided between the forming cooling rollers.