KR20180108197A - Storage oven for keeping and heating high molecular composite material - Google Patents

Abstract

The present invention relates to a storage oven for storing and heating polymer composite materials. The object of the present invention is to maximize the time for the polymer composite materials to stay in the oven without increasing the length of the oven. To this end, the oven of the present invention comprises: an oven body for heating and discharging polymer composite materials supplied from one side to the other side; a plurality of rollers provided in the oven body for moving the polymer composite materials; and a wheel provided at a lower portion of the oven body. In the storage oven (10) for storing and heating the polymer composite materials, the plurality of rollers (12) are arranged in a zigzag from inside the body to increase the time for the polymer composite materials (50) to stay in the oven body.

Description

[0001] STORAGE OVEN FOR HEATING HIGH MOLECULAR COMPOSITE MATERIAL [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage oven for storing and heating a polymer composite material, and more particularly, to a storage oven for storing and heating a polymer composite material by increasing the time for which a polymer composite material, And more particularly, to a storage oven for storing and heating a polymer composite material capable of molding a molded article or a molded article of a 3D printer at a high speed while improving the quality of a molded article.

BACKGROUND ART Recently, a technique related to reinforcement that enhances strength and durability using a polymer composite material has been attracting attention.

The use of the above-described reinforcing technology has the advantage of improving the mechanical performance while reducing the amount of composite material used.

In addition, studies on the additive manufacturing equipment of polymer composite materials, internal skeleton manufacturing technology, 3D molding and 3D printing method are actively carried out.

The above-described lamination processing technology is expected to be expanded not only in the automobile parts market but also in a variety of fields such as aircraft, electronic parts, household appliances, sporting goods, building materials, and the like, .

Further, in the lamination apparatus for manufacturing the inner framework, a thin and long strand-shaped polymer composite material is used, and this polymer composite material is characterized by being easily cured.

Accordingly, the polymer composite material is heated using an oven so that it can not be hardened easily when it is discharged to the outside of the lamination processing apparatus.

FIG. 1 shows an example of a conventional oven used for heating a polymer composite material (hereinafter, simply referred to as a 'composite material').

As shown in FIG. 1, a conventional composite material heating oven 20 is provided with guide plates 200 and 201 for guiding a plurality of strands of composite material 50 at the inlet side.

A plurality of strands of composite material 50 passing through the guide plates 200 and 201 are combined into a bundle while passing through a funnel-shaped heating core die 202 whose outlet is narrowed.

Subsequently, the composite material 50 is discharged to the outside of the oven 20 through the roller 203.

The composite material 50 discharged from the oven 20 is molded into a molded product on a table by a robot and then supplied to a molding device to be integrally molded with the other material or supplied to a stacked 3D printer to produce a stereoscopic product .

However, the conventional oven 20 shown in Fig. 1 has a limitation on the length of the composite material 50 that can be heated in the oven because the composite material 50 stays in the oven for a short time.

Accordingly, in order to heat the composite material 50 having a long length in a short period of time, there is a problem that an oven having a long length needs to be used.

In addition, when the working speed of the robot is adjusted to the feeding speed of the composite material 50 without increasing the length of the oven 20, the maximum working speed of the robot can not be used and the working speed is lowered.

That is, although the robot can manufacture a molded article at a high speed, it is pointed out that the speed at which a molded article is molded is lowered because a sufficiently heated composite material is not supplied at high speed.

On the other hand, the prior art related to the present invention was searched and the following patent documents were searched.

Patent Document 1 proposes a method of manufacturing a fiber reinforced composite material and a carbon-carbon composite material lattice structure for fabricating an ultra-lightweight structure or an ultra-high temperature resistant structure in a lattice form, comprising the steps of: impregnating a bundle of fiber reinforcing materials into a thermosetting resin; Molding the bundle of the fiber reinforcing material impregnated with the thermosetting resin at a room temperature or a high temperature by winding the bundle of the fiber reinforcing material in a predetermined pattern along a guide pin provided on the jig; Wrapping a bundle of the fiber reinforcement material wound around the jig through the guide pin with a heat-shrinkable tape; Separating the guide pin provided at the jig from the jig and removing the lattice structure formed through the jig from the jig; Another modification includes: impregnating a carbon fiber bundle into a polymer resin having a high carbonization rate; Molding the carbon fiber bundle impregnated with the polymer resin in a predetermined pattern along a guide pin provided at a jig to form the carbon fiber bundle at room temperature or high temperature; Wrapping the carbon fiber bundle wound around the jig through the guide pin with a heat-shrinkable tape; Heat treating the lattice structure formed by the preform as described above in a carbonization heat treatment oven in an oxygen-free atmosphere at a temperature of 1000 ° C or more while being wound around a jig; And separating the guide pin provided at the jig from the jig to remove the lattice structure formed through the jig from the jig.

Patent Document 2 discloses a method for manufacturing a glass fiber composite material and a method for manufacturing a housing using the glass fiber composite material. The present invention relates to a method for manufacturing a glass fiber composite material by immersing the glass fiber raw material in a coating solution of a water- The thermoplastic film is fused to the surface of the coated glass fiber fabric to produce a glass fiber composite material and the uniform dispersion of the coating material coated on the glass fiber fabric is shown so that the produced composite material has an improved glass fiber The present invention provides a method for manufacturing a glass fiber composite material which can provide a composite material and is environmentally friendly because a coating solution coated on the glass fiber fabric is water-based

In addition, by using a glass fiber composite material as compared with a housing in which thermoplastic plastic is used as a reinforcing material, it is possible to prevent cracks and damage of a specific area where the housing is weak in embrittlement. A method of manufacturing a housing using a glass fiber composite material in which a pattern sheet appearing on an outer surface is prevented from discoloring / deforming due to heat, by cooling or cooling an upper mold in which a sheet is disposed.

Korean Patent Publication No. 1998-051721 A Korean Patent Publication No. 10-2016-47636 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for heating a composite material to a temperature suitable for molding by maximally increasing the time during which the composite material stays in the oven without increasing the length of the oven.

Another object of the present invention is to prevent the robot from being limited in the feeding speed of the composite material by allowing the composite material to be sufficiently heated in the oven and then supplied at a high speed.

It is still another object of the present invention to make it possible to mold a molded article at a high speed by making maximum use of the working speed of the robot.

It is still another object of the present invention to improve the quality of a molded article by increasing the length of a composite material sufficiently heated in an oven.

According to an aspect of the present invention, there is provided an oven comprising: an oven body for heating and discharging a polymer composite material supplied from one side to the other side; a plurality of rollers provided in the oven body for moving the polymer composite material; A plurality of rollers arranged in a zigzag form in the body to store the polymer composite material in the oven main body, Is increased.

Further, the oven main body is further provided behind the existing oven.

The plurality of rollers are arranged in a zigzag form in a vertical direction in the main body so that the polymer composite material is wound and moved in a direction perpendicular to the rollers.

The plurality of rollers are arranged in a zigzag form in a horizontal direction inside the main body so that the polymer composite material is wound around the rollers in a horizontal direction to move.

And an aluminum plate heater is provided on a wall surface of the oven main body.

Further, an aluminum plate heater unit or a halogen heater unit is provided on the outer front side of the oven main body.

Further, the polymer composite material is supplied in a plurality of strands, and is bundled into a bundle inside the oven main body.

Further, the polymer composite material discharged from the oven main body is manufactured as a product by a molding device or a 3D printer.

According to the present invention, it is possible to maximize the time for the composite material to stay in the oven without increasing the length of the oven, so that the composite material is sufficiently heated to be suitable for molding in an oven.

Accordingly, the robot installed at the rear of the oven can mold the product at a high speed without being limited by the feeding speed of the heated composite material, thereby improving the productivity.

Further, since the length of the composite material sufficiently heated in the oven is increased, the quality of the molded article can be improved.

Also, the storage oven can be installed behind the conventional oven and the installation area can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an example of a conventional oven for heating a polymer composite material; Fig.
2 is a schematic cross-sectional view of a vertical storage oven according to the present invention.
3 is a schematic cross-sectional view of a horizontal storage oven according to the present invention.
FIG. 4 is a layout view of a conventional oven in which a storage oven according to the present invention is installed. FIG.
Figure 5 is a layout diagram of an existing oven replaced with a storage oven of the present invention;
6 is a plan view of a vertical storage oven according to the present invention.
7 is a front view of a vertical storage oven according to the present invention.
8 is a side view of a vertical storage oven according to the present invention.
9 is a schematic view illustrating a state in which an aluminum plate heater is installed in a vertical type storage oven according to the present invention.
FIG. 10 is a schematic view illustrating a state where an aluminum plate heater is installed in a horizontal type storage oven according to the present invention. FIG.
11 is a plan view showing an aluminum plate heater unit connected to the front of a vertical storage oven according to the present invention.
12 is a front view of an aluminum plate heater unit connected to the front of a vertical storage oven according to the present invention.
13 is a plan view showing a halogen heater unit connected in front of a vertical storage oven according to the present invention.
FIG. 14 is a front view of a halogen storage unit connected to the front of a vertical storage oven according to the present invention. FIG.
15 is a perspective view showing an example of a composite material to be supplied to a storage oven;
16 is a perspective view showing another example of the composite material supplied to the storage oven;

Hereinafter, preferred embodiments of the storage oven according to the present invention will be described in detail with reference to the accompanying drawings.

2 and 3, the storage oven 10 according to the present invention includes an oven (not shown) for heating a polymer composite material 50 (hereinafter, simply referred to as a 'composite material' A plurality of rollers 12 provided inside the oven main body for moving the polymer composite material and a wheel 14 provided at a lower portion of the oven main body to store and heat the polymer composite material, The plurality of rollers 12 are arranged in a zigzag form in the body to increase the time for the polymer composite material 50 to stay in the oven main body.

Accordingly, the time for the composite material 50 to stay in the oven is increased without increasing the length of the oven, so that the composite material 50 can be sufficiently heated to be suitable for high-speed molding.

In addition, since the sufficiently heated composite material 50 is discharged at a high speed, a molded article can be manufactured at a high speed by making maximum use of the working speed of the robot.

As shown in FIG. 4, the storage oven 10 may be further provided behind the existing oven 20, and may be installed in place of the existing oven, as shown in FIG.

2, the plurality of rollers 12 are arranged in a zigzag fashion in a vertical direction inside the main body, so that the composite material 50 is rolled in a direction perpendicular to the rollers 12 .

Figs. 6 to 8 show a vertical storage oven for heating a strand-shaped composite material 50. Fig.

6 to 8, the vertical type storage oven 10 according to the present invention includes an inlet roller R1 for guiding the introduction of the polymer composite material 50 into the storage oven 10, An outlet roller R2 for guiding the composite material 50 to be discharged to the outside of the storage oven 10 and an outlet roller R2 for guiding the composite material 50 and 50 ' An upper roller R3 and a lower roller R4.

It is preferable that the lower roller R4 is provided as a movable type which can move up and down.

The tension of the composite material 50 can be adjusted by the above-described structure so that the strand-shaped composite material 50 can be easily supplied to and discharged from the storage oven 10.

A table 42 and a robot 40 are provided behind the storage oven 10 and a gripper 40 for drawing a stranded composite material 50 out of the storage oven 10 is provided on the table 42. [ A gripper (not shown) is provided.

The strand-shaped composite material 50 drawn out of the storage oven 10 by the gripper is molded into a molded product having a predetermined shape by the robot 40.

The molded article formed on the table 42 is transferred to the molding apparatus 60 by the robot 40, and is molded integrally with other materials such as a metal material to produce a final product.

Alternatively, a three-dimensional product may be manufactured by disposing a stacked 3D printer (not shown) in place of the molding apparatus 60.

The vertical storage oven 10 of Figure 7 is shown with three upper rollers R3 and two lower rollers R4 arranged but the upper roller R3 and the lower roller R4 The number can be appropriately adjusted depending on the size of the storage oven.

Instead of the vertical storage oven shown in FIGS. 6 to 8, the plurality of rollers 12 may be arranged in a zigzag form in the horizontal direction inside the body, as shown in FIG. 3, It may be wound in the horizontal direction with respect to the base 12 to move. That is, the storage oven 10 may be configured as a horizontal type.

3, three rollers 12 are disposed on the left side and two rollers 12 are disposed on the right side. However, the number of the rollers 12 is not limited to that of the storage oven 10, It can be appropriately added or subtracted depending on the size.

9 and 10, the aluminum plate heater 70 is provided on the wall surface of the interior of the vertical or horizontal storage oven 10, so that the composite material 50 can be heated.

11 and 12, an aluminum plate heater unit 70 may be separately provided on the outside of the oven main body.

13 and 14, the halogen heater unit 60 may be provided separately from the outside of the oven main body.

The polymer composite material 50 supplied to the storage oven 10 according to the present invention may be a strand, a yarn, a tow, a polymer material, or a composite material, A bundle, a band, a tape, or the like may be used.

The polymer material may be a thermoplastic or an epoxy such as PLA, PE, PP, PA, ABS, PC, PET, PEI or PEEK, an unsaturated polyester resin, But is not limited to, a thermosetting resin.

The composite material is obtained by mixing fibers with the polymer material. Examples of the fibers include glass fibers, carbon fibers, boron fibers, alumina fibers, silicon carbide fibers, aramid fibers, whiskers, Can be used.

Figs. 15 and 16 show an example of a strand-shaped polymer composite material.

The composite material 50 shown in Fig. 15 has a structure in which the core layer 52 surrounds the fibrous layer 54 and the fibrous layer 54 surrounds the coating layer 56. Fig.

The composite material 50 'shown in FIG. 16 is a structure in which the core layer 52 surrounds the coating layer 56 and the coating layer 56 surrounds the fiber layer 54.

The core 52 of the composite material 50 shown in Figs. 15 and 16 comprises at least one of a polymer compound and a fiber material.

The polymer compound may include at least one of a thermoplastic resin and a thermosetting resin.

For example, the polymer compound may be selected from the group consisting of polylactic acid (PLA), polyethylene (PE), polypropylene (PP), polyamide (PA), acrylonitrile-butadiene- (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyetherimide (PEI), polyetherimide (PPS), Polyetheretherketone (PEEK), Ethylene Vinyl Acetate (EVA), Polyurethane (PU), Epoxy (EP), Unsaturated Poly And may include at least one of Unsaturated Polyester (UP), Polyimide (PI), and Phenolic (PF).

The fiber material may include at least one of glass fiber, carbon fiber, natural fiber, aramid fiber, ceramic fiber, viscous fluid fiber, shape memory alloy fiber, optical fiber and piezoelectric fiber.

The fibrous material reinforces the polymer compound when mixed with the polymer compound, and may be optionally encapsulated.

The core 52 may be formed in the form of a yarn, a polymer composite material, a bundle, a band, a tape, or the like as well as a strand shape.

When the core 52 is in the form of a unidirectional strand, it can be formed by consolidating the preheated material strand at a predetermined temperature.

The fibrous layer 54 may be formed in a braided structure on the core 52 by a braiding unit (not shown).

The coating layer 56 in the composite material 50, 50 'shown in FIGS. 15 and 16 may include a polymer compound, and the polymer compound may include a coating polymer.

Further, the coating layer 56 may include a gripping structure to improve the mechanical bonding force.

By the gripping structure, the bonding force between the polymer composite material 50, 50 'and the overmolding material can be improved.

Hereinafter, the operation and effect of the storage oven according to the present invention will be described with reference to FIG.

A storage oven 10 is additionally provided in a conventional oven 20 and a stranded composite material 50 is used and a robot 40 and a molding device 60 are provided behind the storage oven 10 Will be described as an example.

The strand-like composite material 50 supplied from the material supply device 30 to the plural strands is firstly heated in the oven 20 and subsequently heated in the storage oven 10 according to the present invention.

At this time, the composite material 50 is heated in the storage oven 10 in a zigzag manner so as to facilitate molding, and then discharged to the outside of the storage oven 10.

The robot 40 then grips the end of the composite material 50 and places it on a gripper (not shown) provided on the table 42 so that the gripper can move the composite material 50 out of the storage oven 10 Withdraw.

At this time, the lower roller R4 inside the storage oven 10 is lifted up to allow the composite material 50 to be easily discharged to the outside of the storage oven 10.

Since the composite material 50 is sufficiently heated while being transported in a zigzag manner, it can be supplied at a high speed in accordance with the operation speed of the robot 40.

Accordingly, the robot 40 can mold a molded article on the table 42 at a high speed by using the composite material 50.

At this time, the table 42 also rotates and moves according to the movement of the robot 40, so that a three-dimensional molded product is formed.

When the molding of the molded product is completed using the composite material 50, the lower roller R4 is lowered and the polymer composite material 50 as long as the length of the discharged polymer material 50 is supplied to the interior of the storage oven 10 And then heated.

The molded product that has been molded on the table 42 is transferred to the molding apparatus 60 by the robot 40, and is overmolded integrally with other materials such as metal to produce a final product.

In addition, a laminated 3D printer may be provided in place of the molding apparatus 60 described above to produce a molded article.

According to the conventional oven, the time required for the polymer composite material to stay in the oven is short, and there is a problem that the time for heating to a temperature suitable for molding becomes long.

As a result, the composite material can not be supplied at high speed, resulting in a problem of deteriorating productivity.

That is, although the robot can be formed at a high speed, the supply speed of the composite material can not keep up with this.

On the other hand, there is a method of heating the composite material sufficiently by increasing the length of the oven, but in this case, the length of the oven becomes longer and the installation area of the equipment becomes wider.

However, according to the storage oven of the present invention, since the polymer composite material is discharged after passing through a plurality of rollers arranged in a zigzag manner, the time for the composite material to stay in the oven can be maximized.

That is, the polymer composite material can be sufficiently heated and supplied to the robot at a high speed without increasing the length of the oven.

Accordingly, since the robot disposed at the rear of the oven can mold a molded article at a high speed without being limited by the feed rate of the composite material, the time required for molding the molded article can be shortened, and productivity can be improved.

Further, since the composite material is supplied in a sufficiently heated state suitable for molding, the quality of the molded product can be improved.

The foregoing description of preferred embodiments of the present invention has been provided for purposes of illustration and description. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

10: Storage Oven
12: Roller
14: Wheel
20: Oven
30: Material feeding device
40: Robot
42: Table
50, 50 ': Polymer composite material
52: Core material
54: fibrous layer
56: Coating layer
60: Molding device
70: Aluminum plate heater
80: Aluminum plate heater unit
90: Halogen Heater Unit
200, 201: guide plate
202: Heating core die
203: Rollers

Claims (12)

A plurality of rollers 12 provided inside the oven main body to allow the polymer composite material to move, and a plurality of rollers 12 provided in the lower part of the oven main body, A storage oven (10) comprising a wheel (14) for storing and heating a polymer composite material,
The plurality of rollers (12)
Wherein the polymer composite material (50) is arranged in a zigzag form in the main body of the storage oven to increase the time during which the polymer composite material (50) stays in the main body of the oven. The method according to claim 1,
Wherein the storage oven (10) is further provided behind the existing oven (20). The method according to claim 1,
Characterized in that the plurality of rollers (12) are arranged in a zigzag fashion in a vertical direction within the body so that the polymer composite material (50) is rolled in a direction perpendicular to the roller (12) And storage oven for heating. The method of claim 3,
And an aluminum plate heater (70) is provided on the inner wall surface of the oven main body. The method of claim 3,
And an aluminum plate heater unit (80) is provided on the outer front side of the oven main body. The method of claim 3,
And a halogen heater unit (90) is provided on the outer front side of the oven main body. The method according to claim 1,
Wherein the plurality of rollers (12) are arranged in a zigzag form in a horizontal direction inside the body so that the polymer composite material (50) is wound and moved in a horizontal direction with respect to the roller (12) Storage oven for heating. 8. The method of claim 7,
Wherein an aluminum plate heater (70) is provided on a wall surface of the inside of the oven main body. 8. The method of claim 7,
And an aluminum plate heater unit (80) is provided on the outer front side of the oven main body. The method according to claim 1,
And a halogen heater unit (90) is provided on the outer front side of the oven main body. 11. The method according to any one of claims 1 to 10,
Wherein the polymer composite material (50, 50 ') is supplied in the form of a plurality of strands and formed into a bundle in the interior of the oven body. 11. The method according to any one of claims 1 to 10,
Wherein the polymer composite material (50, 50 ') discharged from the oven main body is manufactured as a product by a molding device or a 3D printer.

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