KR20160053687A - The cooling device for low pressure melamine-plywood and its manufacturing method using the cooling device - Google Patents

Abstract

The present invention relates to a cooling apparatus for an LPM (low pressure melamine) plywood and a method of manufacturing an LPM plywood using the cooling apparatus. The present invention provides a cooling apparatus for an LPM plywood, the cooling apparatus which not only arranges the LPM sheet protruded from four side edges of the LPM plywood neatly and automatically, but also is capable of rapidly descending a surface temperature of the LPM plywood after manufacturing an LPM plywood by bonding an LMP sheet to a plywood using a thermal bonding process, and a method of manufacturing an LPM plywood using the cooling apparatus. A cooling apparatus for an LPM plywood according to the present invention includes a vent assembly includes a lower vent assembly which is mounted on the top of an installation frame of a cooling part (17), an upper vent assembly which is mounted just above the lower vent assembly in a state that the upper vent assembly is spaced apart from the lower vent assembly in a predetermined distance, a first connecting fitting which is connected to respective one sides of the upper and lower vent assemblies, a blowing path which is connected to the first connecting fitting, a second connecting fitting by means of which the blowing path is connected to a silencer of a blower, a holding unit which is mounted between the upper and lower vent assemblies and on the opposite side of the upper and lower vent assemblies such that an LPM plywood stays in the air for a predetermined time, a cylinder which is installed on the top of the lower vent assembly through a mount, a connector which is mounted on a rod of the cylinder, a holder on a front end of which a holding roller is installed, and which is horizontally mounted on one side and other side of the connector respectively, and a support on a front end of which a transfer roller is installed, and which is vertically mounted on the bottom of one side and other side of the connector respectively.

Description

TECHNICAL FIELD The present invention relates to a cooling device for LPM plywood and a method for manufacturing LPM plywood using the same,

The present invention relates to a cooling device for a LPM plywood and a method of manufacturing an LPM plywood using the same, and more particularly, to a method of manufacturing a LPM plywood by rapidly cooling the surface temperature of an LPM sheet during a process of bonding a LPM sheet The present invention relates to a cooling apparatus for a LPM plywood and a method for manufacturing an LPM plywood using the same.

The LPM sheet (low pressure melamine sheet) to which the present invention belongs refers to a sheet form in which melamine and urea resin are impregnated with paper printed with various colors and patterns. On the other hand, the LPM plywood is produced by melting the melamine of the LPM sheet by placing the LPM sheet on the surface of the plywood and fusing the LPM sheet and the plywood with the hot press.

The LPM plywood can obtain a surface such as glossy, matte, embossed, and woody depending on the plywood when hot-pressed by hot pressing. The LPM plywood has excellent surface properties such as abrasion resistance, heat resistance, fire resistance and acid resistance, It is also used in building interior materials and floorboards.

This LPM plywood is required to be fused by a hot press at a high temperature during the manufacturing process. Since the surface temperature of the LPM plywood subjected to the fusing process is higher than 100 캜, a post-processing procedure Is possible when the surface temperature of LPM plywood is 40 ~ 50 ℃ after natural cooling process for 7 ~ 15 days.

The conventional problem is that the period of natural cooling, which must be inevitably required, takes too long, and the start of work due to post-processing is delayed. In addition, since a large amount of LPM plywood is required to be loaded during the natural cooling period, not only a large space is required for loading but also foreign substances and pests scattered in the air are dropped on the surface of the plywood in a state of being under- There is a problem that defective plywood is generated.

The LPM sheet 21 and the plywood 20 are adhered to each other by a heat fusion method to form an LPM plywood 22. The LPM sheet 21 and the plywood 20 are bonded to each other at the edge of the slope of the LPM plywood 22, The present invention provides a cooling apparatus for a LPM plywood capable of automatically lowering the protruded LPM sheet 21 neatly and lowering the surface temperature of the LPM plywood 22 sharply and a method of manufacturing an LPM plywood using the same.

The cooling apparatus for a LPM plywood according to the present invention is characterized in that a lower tuyer outlet 42 is mounted on an upper portion of an installation frame 31 of a cooling section 17 and is separated from the lower tuyere 42 by a predetermined interval A first connection part 46 is connected to one side of each of the upper and lower tuyeres 41 and 42 and an air passage 45 is connected to the first connection part 46 And an air blowing passage 45 is connected to the silencer 44 of the blower 43 via a second connecting member 47 as a medium to the air blowing passage 45. Between the upper and lower air blowing openings 41, A mounting unit 50 is mounted on the opposite side of the LPM plywood 22 so that the LPM plywood 22 can stay in the air for a certain period of time. A cylinder 56 is mounted on the upper part of the lower air guide 42 through a mount 57, A connecting rod 51 is mounted on the rod of the connecting rod 51 and the rod 51 is mounted on one side and the other side of the connecting rod 51 52 are horizontally mounted on the upper and lower ends of the connecting rod 51. Supporting rods 54 having feed rollers 32 at their ends are vertically mounted on one end and the other end of the connecting rod 51, To produce an LPM plywood.

The surface temperature of the LPM plywood 22 is rapidly lowered to 50 to 60 ° C. during the manufacturing process and the surface of the LPM plywood 22 is lowered to the surface of the LPM plywood 22 If the surface temperature of the LPM plywood 22 is about 40 캜 after the stabilization time has passed, the post-processing operation can be smoothly performed, so that the overall working process of the LPM plywood 22 is shortened.

Further, as the cooling of the LPM plywood 22 is rapidly performed by the strong wind, the scattered foreign matter and the insects flying in the factory can not stick to the surface of the LPM plywood 22, An excellent effect of improving the quality is produced. On the other hand, the drying time of the LPM plywood 22 is required to be short, so that there is an advantage that a large loading space is not required.

1 is an overall perspective view of an apparatus for producing an LPM plywood according to the present invention.
2 is a perspective view for explaining a plywood mounting part and a plywood supplying part in the present invention;
3 is a perspective view for explaining an LPM sheet stacking portion, a plywood sheet aligning portion, and a hot-
4 is a perspective view for explaining a conveying part, a side trimming part and a cooling part in the present invention.
5 and 6 are perspective views for explaining the operation of the side trimming section in the present invention.
7 and 8 are perspective views for explaining the cooling section and the cooling apparatus in the present invention.
9 is a flowchart for explaining the manufacturing process of the LPM plywood according to the present invention

Hereinafter, a cooling apparatus for a LPM plywood according to a preferred embodiment of the present invention and a method for manufacturing an LPM plywood using the same will be described in detail with reference to the annexed drawings. Detailed description of the present invention will be omitted if it is nothing but a supplementary explanation that does not correspond to the gist of the present invention.

2 is a perspective view for explaining a plywood boarding part 10 and a plywood board feeding part 11 in the present invention, and FIG. 9 is a perspective view showing an LPM Fig. 7 is a flowchart for explaining a manufacturing process of a plywood. Fig. 1, the plywood mounting portion 10, the plywood supplying portion 11, the plywood sheet aligning portion 12, the LPM sheet stacking portion 13, the hot pressing portion 14, the feeding portion 15, ) And a cooling section 17 are installed in the apparatus for manufacturing an LPM plywood according to the present invention.

First, as shown in FIG. 2, as a first step of the present invention, a plurality of plywoods 20 cut into a rectangular shape are loaded on the plywood mounting portion 10. The elevation of the elevation device 30 is elevated and lowered in accordance with the number of the plywoods 20 to be stacked so that the elevation of the elevation of the elevation of the plywood stacking part 10 So that the plywood 20 can be smoothly supplied one by one in accordance with the height of the plywood feeder 11 installed at the side (S10, a plurality of plywood stacks and a single plywood stack preparation stage).

The plywood feeder 11 is provided with a plurality of feed rollers 32 on the upper part of the installation frame 31 and a plywood 20 which is pushed sideways from the plywood boarding part 10 is mounted on the feed roller 32 Are placed one by one in the plywood feeder (11).

3 is a perspective view for explaining the LPM sheet stacking part 13, the plywood sheet aligning part 12 and the hot press part 14 in the present invention. The plywood sheet aligning part 12 includes an LPM plywood 22 And the LPM sheet 21 is placed on both sides of the LPM plywood 22 in between. Therefore, the second step of the present invention is that the LPM sheet stacking part 13 is provided with a plurality of stacked LPM sheets 13 on the upper side of the LPM sheet stacking part 13 before feeding the LPM plywood sheets 22 to the plywood sheet aligning part 12, The sheet 21 is manually moved to the upper surface of the plywood sheet aligning portion 12 (S20, LPM sheet primary feeding step).

Thereafter, the single plywood 20 mounted on the plywood feeder 11 is sucked by the air pressure force of the vacuum pad 34 of the vacuum lifting device 33, and then the LPM sheet 21 is fed to the fed plywood sheet The LPM sheet 21 is manually moved from the LPM sheet stacking portion 13 to the upper surface of the plywood 20 that has just been fed by the operator through the operation portion (step S30, single plywood feed step) (S40, LPM sheet secondary feeding step).

The plywood 20 and the LPM sheet 21 are supplied to the hot press 14 and heated by the hot press 35 at a high temperature of 200 占 폚 or higher The LPM sheet 21 is fused to the plywood 20 by melting the melamine in the LPM sheet 21 with a predetermined pressure so as to form the LPM plywood 22 (S50, step of hot fusing the LPM sheet and plywood).

A configuration in which one plywood 20 is sent from the plywood mounting section 10 to the plywood feed section 11 and a configuration in which the elevation device 30 is elevated and lowered in conjunction with the height of the plywood feed section 11, The structure in which the plywood 20 is attached to the vacuum pad 34 by the vacuum lifting device 33 at the supply part 11 and then is lifted up to the plywood sheet alignment part 12 and the configuration in which the hot press 35 The mechanical operations such as the attachment of the LPM sheet 21 and the plywood 20 by heat welding are performed by a three-dimensional multi-axis control system such as a conventional linear guide such as a sensor You can. Therefore, the present invention is not limited to the type and method of the three-dimensional multi-axis control system, and the technology using the three-dimensional multi-axis control system corresponds to a known technology, and thus a detailed description thereof will be omitted.

FIG. 4 is a perspective view for explaining the conveying unit 15, the side trimming unit 16 and the cooling unit 17 in the present invention, and FIGS. 5 and 6 are perspective views for explaining the operation of the side trimming unit 16 in the present invention . The LPM plywood 22 is attached to the side shedding section 16 along the feed roller 32 of the feed section 15 provided on the side of the hot press section 14 when the LPM plywood 22 is attached to the hot press section 14, (S60, LPM plywood conveying step).

5, the LPM plywood 22 transferred to the lower side of the side trimming part 16 is adsorbed by the vacuum pads 34 of the vacuum lifting device 33 and is lifted up and down twice. The LPM sheet 21 protruding from the edge of the slope during the process of attaching the LPM sheet 22 is neatly and automatically arranged.

That is, as shown in FIGS. 5 and 6, the abrasive paper 36 is mounted on the upper rectangular edge of the side trimming part 16 as a slope. Since the surface of the abrasive paper 36 is in a rough state and the flexibility of the abrasive paper 36 is excellent due to its characteristics, the LPM plywood 22 is adhered to the vacuum lifting device 33, When the LPM sheet 21 protruding from the edge of the slope of the plywood 20 is cut off due to the abrasive paper 36 at the time of lifting up and down the abrasive paper 36 twice as shown by the arrow, The slope of the LPM plywood 22 is neatly arranged (S70, a side cleaning step of the LPM plywood) as shown in FIG. 6 (b).

As shown in FIGS. 4 and 7, the LPM plywood 22 having the cleaned side edges is attracted to the vacuum lifting device 33 to be conveyed to the cooling section 17, 53, the vacuum lifting device 33 is returned to its original position.

7 and 8 are perspective views for explaining the cooling section 17 and the cooling apparatus 40 in the present invention. The lower tuyeres 42 are provided on the upper part of the installation frame 31 of the cooling section 17, And the upper tuyere 41 is mounted at a predetermined distance from the lower tuyere 42 to the upper chamber. The upper and lower tuyeres 41 and 42 function to blow the wind supplied from the blower 43 mounted on the upper part of the installation frame 31 of the side trim unit 16 to the upper and lower surfaces of the LPM plywood 22, ,

A first connecting part 46 is connected to one side of each of the upper and lower tuyeres 41 and 42 and an air blowing passage 45 having excellent flexibility is connected to the first connecting part 46. The air passage 45 The blower path 45 is connected to the silencer 44 of the blower 43 via the second connecting member 47 as a medium.

8, upper and lower tuyeres 41 and 42 are provided on the upper and lower surfaces of the LPM plywood 22 placed between the upper tuyere 41 and the lower tuyere 42, The temperature of the LPM plywood 22 whose surface temperature has been raised is rapidly cooled (S80, cooling step of the LPM plywood).

The LPM plywood 22 pressed at a high temperature of 200 ° C or more in the hot press 14 has a surface temperature exceeding 100 ° C at the instant of being pulled out from the hot press 14. Conventionally, the LPM plywood 22 was subjected to natural cooling for 7 to 15 days, and then, after the surface temperature reached 40 to 50 ° C, the post-processing was performed to cut to a predetermined size.

The surface temperature of the LPM plywood 22 is important in the post-processing of the LPM plywood 22. Since the melamine component contained in the LPM sheet 21 is not dried when the surface temperature is 40 to 50 ° C or higher, There was a difficulty that defects occurred. Therefore, a long drying time of 7 to 15 days is indispensable, so that there is a problem that the post-processing operation is delayed due to prolonged drying time.

In order to solve such a problem of prolonging the surface temperature drying time of the conventional LPM plywood 22, a cooling device 40 as shown in Fig. 7 is created. As shown in FIG. 8, the LPM plywood 22 is provided on the opposite sides of the upper and lower tuyeres 41 and 42 of the cooling device 40 so that the LPM plywood 22 can stay in the air for a predetermined time while the cooling wind is blowing. And a mounting unit 50 for supporting both sides should be provided.

A cylinder 56 is mounted to the upper portion of the lower tuyeres 42 through a mounting table 57. An elongated connecting rod is installed on the rod 56 to linearly reciprocate by the operation of the cylinder 56 51 and a mounting table 52 provided with a mounting roller 53 at the front end thereof are mounted horizontally on one side and the other side of the connection table 51. On the lower side of one side and the other side of the connection table 51, And the conveying roller 32 performs a linear reciprocating motion by the operation of the cylinder 56 on the upper surface of the mounting frame 31. [

When the LPM plywood 22 is sucked to the upper portion of the cooling unit 17 by the vacuum lifting apparatus 33 and the cylinder 56 is operated to cause the mounting roller 53 to contact the bottom surface of the LPM plywood 22 At this time, the vacuum lifting device 33 places the LPM plywood 22 on the mounting roller 53 and returns to the home position.

Since the LPM plywood 22 is floating in the air while being supported by the stationary rollers 53, strong wind is blown from the upper and lower tuyeres 41 and 42 to cool the LPM plywood 22 for a certain period of time, When the stationary roller 53 is returned to its original position by the operation of the cylinder 56, the LPM plywood 22 is loaded down while naturally dropping downward.

As a result, not only the LPM plywood 22 is rapidly cooled during the cooling operation of the cooling part 17, but also the foreign matter and pests scattered in the air are extracted by the wind blown from the cooling device 40, 22 is improved.

The LPM plywood 22 is moved to the cooling section 17 by the vacuum lifting device 33 and the cooling section 17 is moved from the cooling section 17 to the cooling section 17, The operation of the blower 43, the cylinder 56, etc. of the engine 40 is programmed by a conventional three-dimensional multi-axis control system, and this control system corresponds to a known technology, and a detailed description thereof will be omitted.

As described above, the cooling apparatus for LPM plywood according to the present invention and the method for manufacturing LPM plywood using the same reduce the surface temperature of the LPM plywood 22 rapidly to 50 to 60 ° C during the manufacturing process, After the surface stabilization time of the plywood 22 is reached, if the surface temperature of the LPM plywood 22 is about 40 캜, the post-processing operation can proceed smoothly, so that the overall working process of the LPM plywood 22 is shortened .

Further, as the cooling of the LPM plywood 22 is rapidly performed by the strong wind, the scattered foreign matter and the insects flying in the factory can not stick to the surface of the LPM plywood 22, An excellent effect of improving the quality is produced. On the other hand, the drying time of the LPM plywood 22 is required to be short, so that there is an advantage that a large loading space is not required.

10: Plywood loading part
11: lumber supplier
12: plywood sheet alignment part
13: LPM sheet stacking part
14:
15:
16:
17:
20: Plywood
21: LPM sheet
22: LPM plywood
30:
31: Installation frame
32: Feed roller
33: Vacuum lifting device
34: Vacuum pad
35: Hot press
40: cooling device
41: upper tuyer
42: Lower tuyer
43: Blower
44: Silencer
45: blowing furnace
46: First connection part
47: Second connection part
50: Mounting unit
51: Connections
52: Cradle
53: mounting roller
54: Support
55: Feed roller
56: Cylinder
57: Mounting base
S10: Multiple plywood loading and single plywood feeding preparation steps
S20: LPM sheet primary feed step
S30: Individual plywood supply step
S40: LPM sheet secondary feed step
S50: Step of hot fusion of LPM sheet and plywood
S60: LPM plywood transfer step
S70: LPM plywood side trim steps
S80: cooling step of LPM plywood

Claims (2)

A lower tuyere 42 is mounted on the upper part of the installation frame 31 of the cooling unit 17 and the upper tuyere 41 is mounted at a predetermined distance from the lower tuyere 42 at a predetermined interval, 41 and 42 are connected to a first connection part 46. The first connection part 46 is connected to an air passage 45 and the air passage 45 is connected with a second connection part 47, the blower path 45 is connected to the muffler 44 of the blower 43,
A mounting unit 50 is mounted on the opposite side of the upper and lower tuyeres 41 and 42 so that the LPM plywood 22 can stay in the air for a predetermined time. A rod 51 is mounted on the rod of the cylinder 56 and a holder 52 having a fixing roller 53 at its tip is fixed to one side and the other side of the rod 51, , And a supporting stand (54) provided with a conveying roller (32) at the front end is mounted vertically on one side and the other side of the other side of the connecting block (51).
A plurality of plywood boards 20 are placed on a plywood boarding section 10 provided with a vertical elevator 30 and then a single plywood board 20 is connected to the plywood board feeding section 11 provided on the side of the plywood boarding section 10 A plurality of plywood stacks and a single plywood stack preparation step S10 for supplying the plurality of plywood stacks;
An LPM sheet primary feeding step (S20) for feeding an LPM sheet (21) to an upper surface of a plywood sheet aligning portion (12) in an LPM sheet stacking portion (13) in which a plurality of LPM sheets (21) are stacked;
A single plywood supplying step S30 in which the single plywood 20 is picked up from the plywood supplying part 11 by the vacuum lifting device 33 and placed on the first supplied LPM sheet 21;
An LPM sheet secondary feeding step (S40) for feeding the LPM sheet (21) from the LPM sheet stacking portion (13) to the upper surface of the plywood (20) just supplied;
The LPM sheet 21 and the plywood 20 are transferred to the hot press 14 in the state that the LPM sheet 21 is placed on both sides of the plywood 20 and then the hot press 35 is heated A step (S50) of hot-welding the LPM sheet and the plywood to fuse the LPM sheet 21 and the plywood 20;
A LPM plywood transfer step S60 for transferring the LPM plywood 22 drawn out from the hot press 14 to the lower side of the side shed 16 along the transfer roller 32 of the transfer part 15;
The LPM plywood 22 arriving directly under the side sidewall 16 is absorbed by the vacuum lifting device 33 and repeatedly lifted up and down toward the abrasive paper 36 mounted on the slope of the side sidewall 16 (S70) of the LPM plywood which cuts the remaining LPM sheet 21 protruding from the slope edge of the LPM plywood 22 through the abrasive paper 36;
The LPM plywood 22 having the side edges formed thereon is transferred to the cooling section 17 equipped with the cooling device 40 by using the vacuum lifting device 33 and then the upper tuyere 41 and the lower tuyere 42 The surface of the LPM plywood 22 is rapidly heated by blowing wind to the upper and lower surfaces of the LPM plywood 22 through the upper and lower tuyeres 41 and 42, And cooling the LPM plywood to cool the LPM plywood (S80).

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