JP2001322190A - Equipment and method for forming - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment for forming which eases the friction between the surface of a pressing tool and the surface of a forming material such as a paper sheet on the occasion of press forming and makes creases hardly formed even in a place where the amount of change of shape is large and which is automated, by using the pressing tool which is expanded by a fluid supplied and has flexibility or elasticity, for one tool out of a male force and a female mold. SOLUTION: The equipment (A) for forming has a conveyor device (3) having a conveying chain (34), base forms (4) provided for the conveying chain (34) and a pressing tool device (5) forming a formed article in cooperation with the base forms (4). The pressing tool device (5) is equipped with the pressing tool (56) formed of a sheet which is expanded and contracted by introduction and discharge of a fluid and has flexibility, a hydraulic cylinder (S2) moving the pressing tool (56) up and down, a fluid pump (58) introducing the fluid into the pressing tool (56) and discharging it therefrom and an electric heater heating the pressing tool (56) indirectly. The forming material is pressed against the base form (4) by the surface pressure of the pressing tool (56) and thereby it is formed.

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. More specifically, by using a pressing mold having flexibility or elasticity that expands by supplying a fluid to one of the male mold and the female mold by using a fluid, the other mold does not require much accuracy, and an inexpensive mold is used. For what can be used. Also, the present invention relates to a molded article which is less likely to wrinkle or break at a location where the amount of deformation of the molded article is large during press molding.

[0002]

2. Description of the Related Art For example, a thin dish-shaped tray is used as a container for packing fresh foods such as vegetables. Conventionally, such a tray has been formed of a synthetic resin such as expanded polystyrene. Synthetic resin trays are widely used because they have sufficient strength and waterproofness and are inexpensive. However, there was a problem with disposal after use.

[0003] In other words, incineration, which is a common method of disposal, tends to damage the incineration facilities due to the high heat of combustion. Further, a gas containing harmful substances such as dioxin and black smoke are generated, which is not preferable in terms of environmental protection. Therefore, in recent years, attention has been paid to containers made of paper as a main material, which can solve these problems.

[0004] In order to manufacture paper containers, a press forming machine having a male mold and a female mold made of metal is used. The paper container is pressed between the paper sheets that are the material in the male and female molds,
It is molded by further heating.

[0005]

However, the above conventional press forming machine has the following problems. In other words, press the paper sheet between the male and female molds,
High precision is required for the dimensions of both mold parts. For this reason, the price of the mold increases, so that the price of the entire molding machine also increases. Also, the mold surface does not move during press molding. However, the paper sheet surface deforms and moves with respect to the mold surface. For this reason, a large friction is generated between both surfaces during molding, so that the paper sheet is likely to be wrinkled or torn at a position where the deformation amount of the paper sheet is large at the time of press molding. That is, it is difficult to obtain high-value products with stable quality. Further, the yield of the product is lowered, so that the price of the product is also increased.

(Object of the present invention) A first object of the present invention is to
By using a flexible or resilient pressing mold that expands by supplying fluid to one of the male and female molds, the friction between the pressing mold surface and the molding material surface such as paper sheets during press molding is reduced. Accordingly, it is an object of the present invention to provide a molding apparatus and a molding method in which wrinkles are less likely to adhere to a portion having a large deformation amount and are less likely to break.

A second object of the present invention is to provide a molding apparatus and a molding method which use the above-mentioned pressing mold so that the other mold is not required to have such a high accuracy and that an inexpensive mold can be used. To provide.

[0008] A third object of the present invention is to provide a molding apparatus and a molding method capable of automating the production of a molded article using the above-mentioned pressing die and enabling mass production.

[0009]

Means of the present invention taken to achieve the above object are as follows. In the first invention, a conveyor device having a required number of base dies to move, and a pressing die for forming a molded product in cooperation with the base dies,
The pressing die is formed including a flexible sheet that expands and contracts by the introduction and discharge of a fluid, and a molding material is formed by the surface pressure at the time of expansion of the pressing die. A molding apparatus characterized in that the molding apparatus is configured to be pressed against a part for molding.

According to a second aspect of the present invention, there are provided a required number of base dies which move intermittently, and a pressing die for forming a molded product in cooperation with the base dies at a stop position of the base dies. The pressing die is formed to include a flexible sheet that expands and contracts by the introduction and discharge of a fluid, and the surface pressure of the pressing die when expanded expands the molding material into the mold portion of the base die. A molding apparatus characterized in that the molding is performed by pressing.

In a third aspect of the present invention, a conveyor device in which a conveyor is circulated, a base provided at a required interval in the conveyor of the conveyor, and a molded product formed in cooperation with the base. And a position control means for stopping the base at the molding position. The press-type device is formed including a flexible sheet that expands and contracts by introduction and discharge of a fluid. Press mold, lifting control means for controlling the height of the press mold, fluid control means for introducing and discharging fluid into the press mold, and direct or indirect Heating means for heating the molding material by pressing the molding material against the mold portion of the base mold by the surface pressure at the time of expansion of the pressing mold. Device.

According to a fourth aspect of the present invention, there is provided the molding apparatus according to the third aspect of the present invention, further comprising a pressure-reducing means for relieving a pressure applied to the conveying section at the molding position.

According to a fifth aspect of the present invention, there is provided the third or fourth aspect of the present invention, further comprising adjusting means for adjusting a movement stroke from a stop position of the base die to a next stop position. It is a molding device.

According to a sixth aspect of the present invention, there is provided the first, second, third, and second heating means, which comprises heating means for directly or indirectly heating the pressing die or the base die. 4th or 5th
It is a molding device according to the invention of the first aspect.

According to a seventh aspect of the present invention, there is provided a first, second, third, fourth, fifth or sixth material supply device for supplying a molding material to a molding position. It is a molding device according to the invention of the first aspect.

In the eighth invention, during the movement of the mold,
A molding method characterized in that molding is performed by pressing a molding material against a mold portion of the base mold by a surface pressure at the time of expansion of a pressing mold that expands and contracts by introduction and discharge of a fluid.

In the ninth invention, the base mold is intermittently moved, and at the stop position of the base mold, the surface pressure at the time of the expansion of the pressing die, which expands and contracts by the introduction and discharge of fluid, is used.
A molding method characterized in that a molding material is pressed against a mold portion of the base die to form the molding.

The base type may be a male type or a female type. When the base die is a male die, the pressing die is deformed to match the shape of the die part to become a female die. On the other hand, when the base die is a female die, the pressing die is deformed to match the shape of the die part and becomes a male die. The base material is not particularly limited. Examples include, but are not limited to, metals, wood, plastics, and the like.

The heating means includes, for example, a heater for directly heating a base mold and the like, a heater for indirectly heating a pressing mold by heating a fluid, and the like, but is not limited thereto. is not. Further, the heating means may heat one of the base mold and the pressing mold, or may heat both of them.

The adjusting means may be, for example, provided with a sensing unit at a required interval in a transport unit such as a conveyor, reads the sensing unit with a sensor, counts the sensor, and adjusts the movement stroke of the base mold by changing the setting of the count. . Further, there is a type in which a sensor capable of sensing the base is provided, and bases having different sizes are attached to adjust a movement stroke of the base. However, it is not limited to these.

[0021] As the gentle pressure means, for example, there is a means in which a portion for receiving the transport portion is released against the repulsive force of a biasing means such as a spring or rubber. In addition, the transfer unit is received by an elastic material such as a rubber plate. Further, there is an example in which the transport unit itself is formed of an elastic material. However, it is not limited to these.

As the fluid to be introduced into the pressing die, a gas such as air or nitrogen gas or a liquid such as water (including hot water) or oil is adopted, but is not limited thereto. In addition, in order to perform molding quickly and accurately, it is desirable to use a liquid that is an incompressible fluid, but there is no limitation. Examples of the material of the sheet forming the pressing die include, but are not limited to, natural rubber and synthetic rubber, natural resin and synthetic resin, and a composite thereof.

Examples of the molded article molded by the molding apparatus include, but are not limited to, containers such as trays, various tools, interior packaging containers, and the like. The material of the molded article is a metal material, a plastic material, a natural material, or the like in addition to a paper material such as a cardboard, but is not limited thereto. Further, the above materials may be used alone or in combination of two or more.

When the cardboard is made of corrugated cardboard, the corrugated cardboard is formed by laminating cardboard on one or both sides of corrugated paper, so that even when pressed, an air layer is easily formed inside. , High heat insulation effect. In addition, since corrugated cardboard made from waste paper is added value and can be used effectively, it is preferable from the viewpoint of resource saving.

The corrugated cardboard referred to above is a "double-sided corrugated cardboard" in which paper (liner) is adhered to the front and back of corrugated paper (middle shin), and "one-sided corrugated cardboard" in which paper (liner) is adhered to only one side. ”,“ Double-sided corrugated cardboard ”with one-sided corrugated cardboard stuck on one side of double-sided cardboard,“ double-sided double-sided corrugated cardboard ”with one-sided corrugated cardboard pasted on one side This is a concept that includes "releasing" in which only molded paper (middle shin) is used.

The molding material may be a cardboard alone or a laminate of various natural materials or synthetic materials such as biodegradable plastics on the cardboard. Examples of the natural material in this case include paper such as Japanese paper and colored paper, leather, and a rubber sheet made of natural rubber, in addition to the thin wood and those woven with rush. Not limited.

Examples of the biodegradable plastic include microbial systems such as biopolyesters (PHB / V, etc.), bacterial cellulose, microbial polysaccharides (burlan, curdlan, etc.), and fatty acid polyesters (polycaprolactone, polybutylene succinate, etc.). Polyethylene succinate, polyglycolic acid, polylactic acid, etc.), polyvinyl alcohol, polyamino acids (PMLG, etc.), other polyurethanes, chemically synthesized systems such as nylon oligomers, and natural products such as chitosan, cellulose, starch, etc.
Alternatively, the above-mentioned blends and laminates may be mentioned, but the present invention is not limited to the above-mentioned ones.

The operation of the molding apparatus according to the present invention will be described. (Functions of the First and Second Inventions) In the first invention, the molding material is pressed against the mold portion of the base mold by the surface pressure at the time of expansion of the pressing mold while the base mold of the conveyor device moves. In the second invention, the base die moves and stops at the molding position. At the stop position of the base die, the molding material is pressed against the die part of the base die and molded by the surface pressure at the time of expansion of the pressing die.

After molding, the pressing mold is separated from the molded product. The molded article molded on the base moves to the discharge side as the next base moves to the molding position. The molded article is removed from the base at a predetermined location. In addition, the pressing by the pressing die may use the pressure when introducing the fluid into the pressing die, may use the pressure when pressing down the pressing die in a state where it is introduced to some extent, or may further use both. You may make it perform simultaneously.

The pressing die has flexibility at a portion which comes into contact with the molding material. Thereby, at the time of press molding, friction between the press die surface and the molding material surface when the molding material surface is deformed is reduced. As a result, wrinkles are less likely to be formed on a portion where the amount of molding deformation is large, and the portion is not easily broken. Therefore, the quality of the molded product, that is, the product is stable, and a high-value product is obtained. Further, the yield of the product is improved, so that the price of the product can be reduced as a result. In addition, since the production of the molded article can be automated, mass production becomes possible.

Since the pressing mold has flexibility,
The mating base does not require much accuracy. Therefore, an inexpensive base mold can be used, so that the price of the molding device is reduced. Furthermore, since the shape of the pressing die can be flexibly changed in accordance with the shape of the die portion of the base die, the shape of the paired base die does not matter. In particular, when a plurality of types of molded products are molded by the molding apparatus, the pressing die can be used in common, so that only the base die needs to be prepared. Therefore, even in such a case, the cost of the mold can be reduced.

(Operation of the Third Invention) The base provided in the circulating transport section is fed by the operation of the conveyor device. When the base is sent to the molding position, it is stopped by the position control means. The pressing die is set to a predetermined height by the elevation control means of the pressing die device. By the fluid control means,
Fluid is introduced into the pressing die and the pressing die expands. The pressing die or the base die is heated by the heating means. The molding material is pressed against the mold portion of the base mold by the surface pressure when the pressing mold expands, and molded.

After the molding, the fluid is discharged from the pressing die by the fluid control means, and the pressing die shrinks. Thereby, the pressing die is separated from the molded product. In addition, the press mold rises. The molded article molded on the base moves to the discharge side as the next base moves to the molding position. The molded article is removed from the base at a predetermined location.

(Effect of the Fourth Invention) In the apparatus provided with the gentle pressure means for relieving the pressure applied to the transfer section at the molding position, the transfer section is deformed by the pressure when the press section is pressed and formed. It can be prevented from being dripped or damaged.

(Function of the Fifth Invention) In the apparatus having an adjusting means for adjusting the movement stroke from the stop position of the base die to the next stop position, a plurality of types of molded products can be molded by a molding apparatus. Can be. That is, when molding a plurality of types of molded products, the base mold is replaced with another one. If the size of the base mold is different, the position of the base moving to the molding position will be shifted unless the movement stroke also corresponds to the size. If the adjusting means is provided, the moving stroke can be adjusted according to the size of the base die.

(Function of the Sixth Invention) In the apparatus having a heating means for directly or indirectly heating the pressing die or the base die, the molding material is somewhat softened by heat, so that the molding can be performed more smoothly. can do. In addition, the effect that wrinkles are less likely to be formed on portions where the amount of molding deformation is large and that they are less likely to be torn is also more remarkably exhibited.

(Effect of the Seventh Invention) The apparatus provided with the material supply device for supplying the molding material to the molding position can save the labor of the molding operation. Thereby, a cheaper molded article can be provided.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on an embodiment shown in the drawings. 1 is a front view showing an embodiment of a molding apparatus according to the present invention, FIG. 2 is a plan view of the molding apparatus shown in FIG. 1, FIG. 3 is a right side view of the molding apparatus shown in FIG. 1, and FIG. It is explanatory drawing which sectioned the press type | mold of an apparatus.

FIG. 5 is a sectional view corresponding to the II section in FIG. 4, FIG. 6 is a plan view explanatory view showing the position of a sensor constituting the position control means, and FIG. 7 is a front view showing the structure of the pressure reducing device. FIG. 8 is a partial cross-sectional explanatory view showing a state in which a molded product is being molded by a pressing die device, and FIG. 9 is a perspective view showing an example of a molded product molded by the molding device.

In the following description, the expression of the position and direction such as up and down, front and back, left and right, etc. is based on FIG. 1 in principle. In addition, for convenience of description, the description may be made with reference to the target drawing.

Reference numeral A denotes a molding device. The forming apparatus A according to the present embodiment is for manufacturing a tray (dish container) made of cardboard as shown in FIG. However, the molding device A
Is not limited to such a container. The molding apparatus A can produce various molded products by changing the base mold 4.

The molding apparatus A includes a main body frame 1, a scaffolding frame 2, a conveyor device 3, a base 4, a pressing die 5, a pressure reducing device 6, and a material supply device 7. The main body frame 1 is assembled using angle iron or iron plate. On the front side of the main body frame 1, a scaffold frame 2 serving as a scaffold for an operator to perform each operation such as maintenance is provided.

(Conveyor Apparatus 3) The conveyor apparatus 3 has rotary shafts 300 pivotally supported in the front-rear direction at a total of four places on the left and right sides of the upper portion and the lower left and right sides of the main body frame 1. Sprockets 30, 31, 32, and 33 are provided at both front and rear ends of each rotating shaft 300. Each of the front sprockets 30, 31, 32, 33 and the rear sprockets 30, 31, 32, 33 has an endless transport chain 34.

A transport plate 35 is attached to every other pin link plate 340 constituting the transport chain 34. The transport plate 35 is provided to extend between the transport chains 34 in the front-rear direction. The width of the transport plate 35 in the left-right direction is set to be approximately twice the width of the pin link plate 340. Transport plate 35
In the figure, the center part in the left-right direction is fixed to the pin link plate 340, and both side ends are located at the center part of the left and right adjacent pin link plates 340. The four corners of the transport plate 35 are notched diagonally.

In FIG. 1, a sprocket 320 is provided at an intermediate portion of the upper right rotating shaft 300. A drive motor M is attached to the main body frame 1. A sprocket 321 is attached to a rotation shaft of the drive motor M. Chain 32 between sprockets 320 and 321
2 is hung.

The lower right sprocket 33 is located to the left of the sprocket 32 located above. Thereby, the transport chain 34 between the sprockets 32 and 33 is inclined as shown in FIG. Further, the rotation shaft 300 of the sprocket 33 can be moved and adjusted in the left-right direction. Thereby, the tension of the transport chain 34 can be adjusted.

As shown in FIG. 6, a press-type device 5 described later
, Sensors 83 and 84 constituting position control means and adjustment means are juxtaposed adjacent to one of the transport chains 34. The sensors 83 and 84 are magnetic sensors, and detect the presence of the transport plate 35 when the transport plate 35, which is a magnetic material, is above. The transport plate 35 stops in a state where the sensors 83 and 84 are located inside the obliquely cut-out portions of the adjacent transport plates 35 (see FIG. 6). The conveyance plate 35 is sensed and counted by the sensors 83 and 84, and the stop position is controlled. Further, by changing the setting of the count, the movement stroke of the base 4 can be adjusted.

(Base 4) The base 4 is made of wood. Base type 4
Has approximately the same size as the transport plate 35. That is, the width in the left-right direction is the same, and the length in the front-rear direction is slightly shorter in the base mold 4. The base die 4 is fixed with bolts so that the front and rear ends of the transport plate 35 are left. The mold 4 is provided with four mold portions 40 at equal intervals in the front-rear direction. Mold part 40
Is a concave mold for molding a tray, and the base mold 4 is a female mold.
In the forming apparatus A, one cardboard 9a (see FIG. 7) is formed using the two base molds 4.

(Pressing Device 5) The pressing device 5 has a gate-shaped frame 50. The frame 50 is fixed to an intermediate portion of the main body frame 1 in the left-right direction so as to straddle the conveyor device 3 in the front-rear direction. A frame 51 is provided horizontally above the frame 50.

A hydraulic cylinder S1 is attached to the center of the frame 51 in the front-rear direction with the rod facing downward. Hydraulic cylinders S2 and S3 are similarly mounted on both sides of the hydraulic cylinder S1. Hydraulic cylinder S1,
Steps S2 and S3 together with sensors 81 and 82, which will be described later, constitute a lifting control means. The hydraulic cylinder S1 is a high-speed type that can expand and contract the rod at a high speed. The hydraulic cylinders S2 and S3 are of a low-speed type in which fine adjustment of the extension and contraction of the rod is easy. The hydraulic cylinder S1 and the hydraulic cylinders S2 and S3 are driven by different hydraulic systems, respectively.
Controlled.

An elevating base member 52 is fixed to the tip of the rod of each of the hydraulic cylinders S1, S2 and S3. The fluid control member 5 is connected to the lower part of the elevating base member 52 via a connecting plate 53.
5 is fixed. The fluid control member 55 has a rectangular shape in plan view. In FIG. 5, the width of the fluid control member 55 in the vertical direction (the moving direction of the transport chain 34) is set to be approximately twice the width of the base die 4. Electric heaters H are provided at seven locations at equal intervals on the upper surface of the fluid control member 55 (FIG. 4,
See FIG. 8). The electric heater H constitutes a heating means. The upper surface of the fluid control member 55 is covered with a heat insulating plate 54.

The fluid control member 55 has a flow space 550 through which a fluid (hot water) flows. Distribution space 5
5 includes two thick space portions 550a provided in parallel in the left-right direction in FIG. 5, and four narrow space portions 550b orthogonal to the space portions. Each space 550b
Are provided in parallel with each other and at equal intervals. At the left and right ends of the flow space 550, flow spaces 551 and 552 communicating with each space 550b are provided in parallel with the space 550a. At the front and rear ends of the flow space portions 551 and 552, flow ports 553 and 55 communicating with the outer side surface of the fluid control member 55 are provided.
4, 555 and 556 are provided.

The distribution ports 555, 556 of the distribution space 552
Is closed with a cap 558. The tube T is connected to the communication ports 553 and 554 of the communication space 551 via a connector.
1, T2 are connected. The tubes T1 and T2 extend from a fluid pump 58 described later. The fluid passes through the tubes T1 and T2, and the respective flow spaces 550, 551,
It is introduced into 552 and discharged. The fluid control member 55 may be provided with a pressure regulating valve (safety valve) for preventing the internal pressure from becoming excessively high. In addition, distribution port 5
Which of the outlets 53, 554, 555, and 556 is connected to the tube and the cap is attached is appropriately set.

In the bottom of the intersection (eight in total) of the spaces of the flow space 550, three holes are provided at the three positions, respectively, which communicate with the external lower surface. The lower surface side of each through hole 557 is expanded by a countersink. As described above, since the three through holes 557 are provided at eight positions dispersedly, the expansion and contraction of the pressing die 56 due to the introduction and discharge of the fluid are performed almost uniformly over the entire surface.

On the lower surface of the fluid control member 55, a pressing mold 56 is provided.
Is attached. The pressing die 56 is formed of a flexible rubber sheet. A concave portion is provided on the entire periphery of the lower surface of the fluid control member 55. Press type 5
Reference numeral 6 denotes a liquid holding member 57 which is liquid-tightly fixed to the lower surface of the fluid control member 55 by fastening a rectangular holding frame 57 with bolts.

At the lower part of the scaffold frame 2, a fluid pump 58 constituting a fluid control means is provided. Fluid pump 5
8 has a frame 580. At the right end of the frame 580, a hydraulic cylinder 581 is mounted with the rod facing left. A suction / discharge cylinder 582 is provided at the left end of the frame 580. The rod of the hydraulic cylinder 581 is attached to a piston (not shown) inside the suction / discharge cylinder 582.

The suction and discharge cylinder 582 has a tube T1
Are connected at one end. The tube T2 is branched and connected to the tube T1 on the way. The inside of the suction and discharge cylinder 582 is filled with a fluid (hot water). And a tube T1 communicating with the suction / discharge cylinder 582,
Fluid is allowed to flow inside T2 and the fluid control member 55.

According to the fluid pump 58, the hydraulic cylinder 581 is operated to move the piston forward and backward, so that fluid can be introduced and discharged into the fluid control member 55. Thus, the pressing die 56 expands when a fluid is introduced, and contracts when the fluid is discharged.

On the right side of the frame 50, sensors 81, 8 constituting elevation control means for controlling the height of the pressing die 56 are provided.
2 are provided. The sensors 81 and 82 are mounted at a predetermined height via a mounting bracket 80. Sensor 81, 82
Is a magnetic sensor for detecting the presence of the elevating base member 52 and the fluid control member 55 which are magnetic materials.

(Release device 6) Referring to FIG. At a molding position inside the frame 50, a pressure reducing device 6 as a pressure reducing means is provided. The pressure-reducing devices 6 are provided at two front and rear positions corresponding to the respective transport chains 34. The pressure-reducing device 6 has pressure-releasing tools 60 on both left and right sides. The gentle pressure tool 60 is mounted on the frame 5
It has an attachment plate 62 for fixing to zero. Mounting plate 6
2 is provided with a tubular guide member 61. Guide member 6
A receiving plate 63 is provided at a lower portion of the first so as to protrude horizontally. An adjustment bolt 64 is screwed into the receiving plate 63 so that the tip thereof faces downward in the vertical direction.

An elevating body 65 is vertically slidably mounted on the tubular guide 61. At the lower part of the elevating body 65, a contact piece 650 is provided to protrude horizontally. A spring receiver 652 is provided at the lower end of the elevating body 65.

Below the guide portion 61, there is provided a mounting member 66 fixed to the main body frame 1. An adjusting bolt 67 is screwed into the attachment 66 so as to penetrate the attachment 66 in the up-down direction with the tip end facing upward. A spring receiver 670 is provided at the upper end of the adjustment bolt 67. Then, the spring receivers 652, 6
A compression spring 68 is interposed between 70.

A receiving member 69 is horizontally installed between the upper part of the elevating body 65 of the gentle pressure tool 60 on both the left and right sides via an attachment pin 651. Under normal conditions, the tip of the adjustment bolt 64 and the contact piece 650 are in contact with each other due to the repulsive action of the compression spring 68. The receiving member 69 is disposed so as to be substantially in contact with the lower part of each transport chain 34. Although not shown, a receiving plate for preventing deformation of the transport plate 35 due to pressure during molding may be provided below the transport plate 35 at the molding position.

By turning the adjustment bolt 64, the height of the elevating body 65, that is, the height of the receiving member 69 can be adjusted. Thereby, the horizontality of the receiving member 69 can be adjusted. Also, by turning the adjustment bolt 67,
The repulsive force of the compression spring 68, that is, the hardness of the spring can be adjusted.

(Material Supply Apparatus 7) On the left side of the main frame 1, a material supply apparatus 7 is provided. The material supply device 7
It has a gate-shaped support frame 70 provided on the main body frame 1 so as to straddle the conveyor device 3. Two guide rails 71 are juxtaposed in a horizontal portion of the support frame 70. The guide rails 71 are provided parallel to each other and horizontally in the left-right direction with a required interval in the front-rear direction.

A transition body 72 is attached to the guide rail 71 so as to be able to move left and right. At a lower portion of the transition body 72, suction members 73 are provided at four places in total. The suction tool 73 has a structure for suctioning an article by suction of air. According to the material supply device 7, the corrugated cardboard 9 a as the material can be adsorbed by the adsorber 73 and placed on the base die 4.

(Operation) The operation of the molding apparatus A according to the present embodiment will be described with reference to FIGS. (1) The transport chain 34 of the conveyor device 3 rotates clockwise in FIG. Corrugated cardboard 9a to be molded (see FIG. 7)
Is sent below the pressing die 56 of the pressing die device 5 and stops. The stop position of the base 4 is determined by the sensor 8
3, 84 are controlled by sensing and counting the transport plate 35.

(2) When the conveyor device 3 stops, a new cardboard 9a is supplied by the material supply device 7 to the left of the press-type device 5. The uppermost one of the stacked cardboards 9a is sucked by the suction tool 73. The transition body 72 moves to a predetermined position and descends while the cardboard 9a is held. The suction by the suction tool 73 is released, and the cardboard 9a is placed on the base mold 4. The cardboard 9a is placed on the upper part of each base 4 from the placement section to the pressing device 5.

(3) When the base 4 on which the cardboard 9a is placed is stopped at the molding position, the hydraulic cylinder S1 is operated, and the pressing die 56 is lowered to a predetermined height (slightly above the cardboard 9a) and stopped. The stop position of the pressing die 56 is controlled by the lower sensor 82. When the hydraulic cylinder S1 operates, no hydraulic pressure is applied to the hydraulic cylinders S2 and S3. Thereby, the hydraulic cylinder S1 operates smoothly at high speed.

(4) When the pressing die 56 stops at the above height, a predetermined hydraulic pressure is applied to the hydraulic cylinders S2 and S3.
As a result, the rods of the hydraulic cylinders S2 and S3 do not shrink even if a reaction force is exerted when the pressing mold 56 expands and forms. That is, the pressing force does not rise due to the reaction force and the pressing force does not weaken. at the same time,
The fluid pump 58 is operated, and hot water as a fluid is supplied from the suction / discharge cylinder 582 to the fluid control member 55 through the tubes T1 and T2 as shown in FIG. As a result, the hot water enters the circulation space 550 from the circulation space 551, and is introduced to the back side of the pressing mold 56 through the through hole 557. The pressing mold 56 expands due to the introduced hot water.

(5) When the pressing die 56 expands, the pressing die 5
Due to the surface pressure of the mold 6, the cardboard 9a is
And pressed. Since the pressing mold 56 is heated by hot water introduced into the inside, the corrugated cardboard 9a is somewhat softened by heat during molding. This allows
A molded article can be molded more smoothly. Also,
Wrinkles are less likely to be formed on portions where the amount of molding deformation is large, and they are not easily broken. The hot water is continuously heated by the fluid control member 55 heated by the electric heater H so that a constant temperature is maintained.

(6) When the corrugated cardboard 9a is pressed against the base mold 4 and formed, a force from above is also applied to the receiving member 69 that receives the base mold 4 via the transport plate 35. Receiving member 69
Is released downward by the gentle pressure action of the compression spring 68. This alleviates the pressure applied to the base 4, the transfer plate 35, and the transfer chain 34, and prevents them from being deformed or damaged by the pressure.

(7) When the molding is completed, the fluid pump 58
Operates, and hot water is drawn into the suction / discharge cylinder 582. Thereby, the pressing die 56 contracts, and the pressing is released. The hydraulic cylinder S1 is operated, and the pressing mold 56 moves upward and stops at a predetermined height. The stop position of the pressing die 56 is controlled by the upper sensor 81.

(8) Molded product 9 molded on base mold 4
Moves to the discharge side as the next base mold 4 moves to the molding position. Finally, when the base die 4 is inverted at the tip of the conveyor device 3 (the position of the sprocket 32), the molded product 9 is automatically die-cut and falls.

According to the molding apparatus A, since the pressing die 56 has flexibility, the base die 4 to be paired does not require much accuracy. Therefore, an inexpensive base die 4 can be used. In addition, the pressing mold 56 is a mold part 40 of the base mold 4.
Since the shape can be flexibly changed according to the shape of the base mold 4, even if the shapes of the paired base molds 4 are variously changed, it can be flexibly handled. In particular, even when a plurality of types of molded products are molded by the molding apparatus A, since the pressing mold 56 can be shared, only the base mold 4 needs to be prepared. Therefore, even in such a case, the cost of the mold can be reduced.

The pressing mold 56 is made of a cardboard 9 made of a molding material.
The part which contacts with a has flexibility. This allows
During the pressing, the friction between the surface of the pressing die 56 and the surface of the cardboard 9a when the surface of the cardboard 9a is deformed is reduced. As a result, wrinkles are less likely to be formed on a portion where the amount of molding deformation is large, and the portion is not easily broken. Therefore, the quality of the molded product, that is, the product is stable, and a high-value product is obtained. Further, the yield of the product is improved, so that the price of the product can be reduced as a result.

FIG. 9 shows a molded article 9 produced by the molding apparatus A according to the present embodiment. The molded article 9 has concave portions 90 formed at eight places. By separating the recess 90, a tray made of cardboard is obtained. In addition, since the tray obtained as described above is heated and pressed, the shape retention is good. Therefore, after cooling, the shape does not return to the original flat shape.

The terms and expressions used in the present specification are merely illustrative and not restrictive, and do not exclude terms and expressions equivalent to the above-mentioned terms and expressions. Further, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the technical idea.

[0079]

The present invention has the above configuration and has the following effects. (A) According to the molding apparatus and the molding method according to the present invention,
The pressing die has flexibility at a portion that comes into contact with the molding material. Thereby, at the time of press molding, friction between the press die surface and the molding material surface when the molding material surface is deformed is reduced. As a result, wrinkles are less likely to be formed on a portion where the amount of molding deformation is large, and the portion is not easily broken. Therefore, the quality of the molded product, that is, the product is stable, and a high-value product can be obtained. Further, the yield of the product is improved, so that the price of the product can be reduced as a result. In addition, since the production of molded articles can be automated, mass production becomes possible.

(B) Since the pressing mold has flexibility,
The mating base does not require much accuracy. Therefore, an inexpensive base mold can be used, so that the price of the molding device is reduced.

(C) Since the shape of the pressing die can be flexibly changed in accordance with the shape of the die portion of the base die, the shape of the paired base die does not matter. In particular, when a plurality of types of molded products are molded by the molding apparatus, the pressing die can be used in common, so that only the base die needs to be prepared. Therefore, even in such a case, the cost of the mold can be reduced.

(D) In the apparatus provided with a gentle pressure means for relieving the pressure applied to the transfer section at the molding position, the transfer section is deformed or damaged by the pressure when the press section is pressed and formed. Can be prevented.

(E) A device provided with an adjusting means for adjusting a movement stroke from a stop position of a base die to a next stop position can form a plurality of types of molded products by a molding device. That is, when molding a plurality of types of molded products, the base mold is replaced with another one. If the size of the base mold is different, the position of the base moving to the molding position will be shifted unless the movement stroke also corresponds to the size. If the adjusting means is provided, the moving stroke can be adjusted according to the size of the base die.

(F) In the apparatus provided with the heating means for directly or indirectly heating the pressing die or the base die, the molding material is somewhat softened by heat, so that the molding can be performed more smoothly. In addition, the effect that wrinkles are less likely to be formed on portions where the amount of molding deformation is large and that they are less likely to be torn is also more remarkably exhibited.

(G) The apparatus provided with the material supply device for supplying the molding material to the molding position can save the labor of the molding operation. Thereby, a cheaper molded article can be provided.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the molding apparatus shown in FIG.

FIG. 3 is a right side view of the molding apparatus shown in FIG.

FIG. 4 is an explanatory view showing a cross section of a pressing die of the pressing die device.

FIG. 5 is a cross-sectional view corresponding to the II section in FIG. 4;

FIG. 6 is an explanatory plan view showing the positions of sensors constituting the position control means.

FIG. 7 is an explanatory front view showing the structure of a pressure reducing device.

FIG. 8 is a partial cross-sectional explanatory view showing a state where a molded product is being formed by a pressing die device.

FIG. 9 is a perspective view showing an example of a molded product molded by a molding device.

[Explanation of symbols]

 A Molding device 1 Main frame 2 Scaffolding frame 3 Conveyor device 300 Rotary shaft 30, 31, 32, 33 Sprocket 34 Transport chain 340 Pin link plate 35 Transport plate 320 Sprocket M Drive motor 321 Sprocket 322 Chain 83, 84 Sensor 4 Base 40 Mold part 5 Pressing type device 50 Frame 51 Mounting plate S1, S2, S3 Hydraulic cylinder 52 Elevating base member 53 Connecting plate 54 Insulating plate 55 Fluid control member H Electric heater 550 Flowing space portions 550a, 550b Space portions 551, 552 Flowing space portions 553, 554, 555, 556 Flow port 558 Cap T1, T2 Tube 557 Through hole 56 Pressing type 57 Pressing frame 58 Fluid pump 580 Frame 581 Hydraulic cylinder 582 Suction / discharge cylinder 80 Mounting bracket 8 , 82 Sensor 6 Release device 60 Release device 61 Guide member 62 Mounting plate 63 Receiving plate 64 Adjusting bolt 65 Elevating body 650 Contact piece 651 Mounting pin 652 Spring receiving device 66 Mounting device 67 Adjusting bolt 670 Spring receiving device 68 compression spring 69 receiving member 7 material supply device 70 support frame 71 guide rail 72 transition body 73 suction tool 9a cardboard 9 molded article 90 recess

Claims (9)

[Claims] 1. A conveyor device (3) having a required number of base dies (4) to move, and a pressing die (56) for forming a molded product in cooperation with the base dies (4).
The pressing die (56) is formed to include a sheet having flexibility to expand and contract by the introduction and discharge of a fluid, and by the surface pressure of the pressing die (56) when expanded, A molding apparatus, characterized in that a molding material is pressed against a mold part (40) of the base mold (4) for molding. 2. A required number of base dies (4) that move intermittently, and a pressing die (56) that forms a molded product in cooperation with the base dies (4) at a stop position of the base dies (4). The pressing die (56) is formed including a sheet having flexibility to expand and contract by the introduction and discharge of a fluid, and is formed by the surface pressure of the pressing die (56) at the time of expansion. A molding material, wherein the molding material is pressed against the mold part (40) of the base mold (4) to perform molding. 3. A conveyor device (3) in which a conveyor is circulated, a base (4) provided at a required interval in the conveyor of the conveyor (3), and cooperating with the base (4). Press device (5)
And position control means for stopping the base mold (4) at the molding position,
The press-type device (5) includes a press-type (56) formed by including a flexible sheet that expands and contracts by introducing and discharging a fluid, and a height of the press-type (56). Lifting / lowering control means for controlling the pressure, fluid control means for introducing / discharging the fluid into / from the pressing die (56), and directly or indirectly adding the pressing die (56) or the base die (4). Heating means for warming, and the molding material is pressed against the mold part (40) of the base mold (4) by the surface pressure of the pressing mold (56) when expanded to form. A molding device. 4. The molding apparatus according to claim 3, further comprising a pressure reducing unit configured to relieve a pressure applied to the conveying unit at the molding position. 5. The molding apparatus according to claim 3, further comprising adjusting means for adjusting a moving stroke from a stop position of the base die (4) to a next stop position. 6. A heating means for directly or indirectly heating the pressing die (56) or the base die (4). The molding apparatus according to the above. 7. The molding device according to claim 1, further comprising a material supply device for supplying a molding material to a molding position. 8. The mold material of the base mold (4) is moved by the surface pressure at the time of expansion of the pressing mold (56) which expands and contracts by introduction and discharge of a fluid during movement of the base mold (4). A molding method characterized by being molded by pressing against (40). 9. The base die (4) is intermittently moved, and at a stop position of the base die (4), the surface pressure at the time of expansion of the pressing die (56) that expands and contracts by the introduction and discharge of a fluid, A molding method, characterized in that the molding material is pressed against a mold part (40) of the base mold (4) and molded.