KR101090670B1 - Auto feeder for hot press for plywood - Google Patents

Abstract

The present invention relates to an auto feeder for plywood hot press, the feeder for injecting the cold press plywood into the hot press for thermocompression, the center pressure for pressing the center surface of the uppermost plywood of the cold press laminated laminated feeder downward The uppermost plywood is separated from the laminated plywood by absorbing the uppermost plywood surface from both sides of the center pressurizing means while pressing the center of the uppermost plywood by the center pressurizing means and then raising both sides of the uppermost plywood upwards. Plywood bending means and plywood feeding means for pushing the separated top layer plywood in the hot press direction, and according to the present invention, the cold press plywood laminated in multiple layers is automatically separated by one sheet and hot Not only can it be put into the press, it can prevent the pallet from being put into the hot press, D. If two or more cold press plywoods are misinjected into the hot press, it is possible to return them and separate them one by one before putting them into the hot press.

Plywood, hot press, feeder

Description

Auto feeder for plywood hot press {AUTO FEEDER FOR HOT PRESS FOR PLYWOOD}

The present invention relates to an auto feeder for plywood hot press, and more particularly, a plurality of veneers are laminated in a plywood unit with a thermosetting paste in a plywood manufacturing process and the laminated veneers are heated in a hot press for thermal curing. The present invention relates to a plywood hot press auto feeder, which is laminated to laminated veneers and separated by one sheet of plywood into a hot press.

Plywood is a laminate of a number of thin veneers obtained from solid wood, laminated with a multitude of intersecting grains in each layer. In order to bond the veneers constituting the plywood, first, a thermosetting paste is applied on the surface of the veneer and cold pressed to make a single press cold plywood, and the cold press plywood is thermocompressed by hot pressing to thermoset. use.

In this process, the cold press plywood after the paste bonding process and the cold pressing process is difficult to be separated and stored or transported one by one before being put into a hot press, and thus stacked several tens or hundreds. In this process, the uncured paste flows down from some edges of the veneer, causing the cold press plywood laminated on the top and bottom to be entangled with each other. Brings a grievance

When two or more cold-compressed plywoods entangled by the spilled paste are heat-compressed as they are in the hot press, the cold-pasted plywood is put into the hot press because the pasted paste is also thermally cured and the plywood is difficult to separate into sheets after hot pressing. Before doing so, they must be separated by sheet. Therefore, it is difficult to automate the process of injecting the laminated cold press plywood into the hot press, and the worker has to separate the cold press plywood one by one into the hot press.

The present invention devised to solve the problems of the above-described conventional plywood manufacturing process is to provide a plywood hot press auto feeder that can be automatically put into the hot press by separating each sheet of cold-compressed plywood laminated in multiple layers. There is this.

Another object of the present invention is to provide an auto feeder for plywood hot press that can prevent the pallet arranged at the bottom of the laminated plywood into the hot press for protecting the plywood during transportation and loading of the cold press plywood.

Still another object of the present invention is to provide an auto feeder for plywood hot press that can cut off two or more cold-compressed plywoods into a hot press in the process of feeding.

The present invention to achieve the above object is a feeder for injecting the cold-pressed plywood into the hot press for thermocompression, the center pressing means for pressing the central surface of the uppermost plywood of the laminated cold-pressed plywood and the feeder; Plywood bending means for adsorbing the uppermost plywood surface from both sides of the center pressurizing means while pressing the center of the uppermost plywood with the center pressurizing means and then lifting both sides of the uppermost plywood upwards to separate the uppermost plywood from the laminated plywood below And, it characterized in that it comprises a plywood input means for pushing the separated top layer plywood in the hot press direction.

Above the stacked cold press plywood, pallet identification means for identifying the pallet laid on the bottom for protection of the plywood when laminating the cold press plywood and cold press plywood, and the pallet is discharged when the pallet is detected by the pallet identification means. It may further include a pallet discharge means for pushing to the side.

The plywood feeder of the plywood feeding means is further provided with a plywood thickness measuring means for measuring the thickness of the cold press plywood to be pushed to the hot press side by the feeding roller, the thickness of the cold press plywood pushed to the hot press side is plywood 1 When the thickness exceeds the length, it is preferable to rotate the feeding roller back to the cold press plywood stacking position.

According to the present invention having the above-described configuration, the cold press plywood laminated in a plurality of layers can be automatically separated one by one and put into the hot press, and the pallet can be prevented from being put into the hot press, and also in the hot press. If two or more cold press plywoods are wrongly put back, they can be put back into the hot press after separating them one by one.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the auto feeder for plywood hot press in the present invention.

1 is a front view of a plywood hot press auto feeder 100 and a pallet discharge bin 200 according to the present invention, Figure 2 is a plywood hot press auto feeder 100 shown in FIG. 83 is a side view shown together.

Referring to Figure 1, the front of the plywood hot press auto feeder 100 according to the present invention is provided with two front columns (7a, 7b) installed perpendicular to the bottom, the middle of the front columns (7a, 7b) It can be seen that the point forms a space lower than the floor, and the lift 1 is installed in this space. 2 and 4, it can be seen that two rear columns 7c and 7d are also installed behind the front columns 7a and 7b. In addition, the upper end of each column is connected by upper beams 9a, 9b, 9c. As shown in FIG. 2, the cold press plywood 5 is transported by a forklift, etc., and then placed on the plywood introduction conveyor 83, and then transferred to the lift 1. In order to prevent the cold press plywood 5 from being damaged when transported by a forklift or the like, a pallet 3 is placed on the lowest layer when the cold press plywood 5 is laminated. The auto feeder 100 according to the present invention is introduced into the inside, and the cold press plywood 5 stacked on the lift 1 is separated, one by one, fed to the hot press 300 side, and the pallet 3 laid on the lowermost layer. Separating, discharge to the pallet discharge bin (200).

As shown in FIGS. 1 and 2, carriers 27a and 27b are provided inside the front columns 7a and 7b, and the carriers 27a and 27b are connected to the upper beam 9a by a chain 29. Is connected to the elevating sprockets 31a and 31c of the long axis 35 installed in the long axis 35. The rotational force is obtained by the power of the lifting motor 33 installed in the upper beam 9a. Reference numerals 31b and 31e denote deceleration sprockets. Referring to FIG. 2, the other end of the chain 29 connected to the carriers 27a and 27b is connected to the weight 75 provided in the rear columns 7c and 7d to rotate the lifting motor 33 to rotate in the direction of rotation. As a result, the carriers 27a and 27b are elevated. Reference numeral 73 denotes a weight collection for receiving and guiding the weight 75.

FIG. 3 is a plan view showing only a part of the apparatus assembled to the front columns 7a and 7b in the plywood hot press auto feeder shown in FIGS. 1 and 2.

As shown in FIG. 3, the carriers 27a and 27b are arranged in two front columns 7a and 7b one by one, and the arm 39 is directed from the two carriers 27a and 27b toward the hot press 300. The protrusion is formed, and the movable beam 11 connects the two arms 39. Thus, the movable beam 11 is elevated together when the carriers 27a and 27b are lifted up and down.

5a to 5f show only the apparatus assembled to the front columns 7a and 7b in the plywood hot press auto feeder shown in FIGS. 1 and 2.

5a to 5f, the center press means for pressing down the center surface of the uppermost plywood of the cold-compression plywood on which the auto feeder 100 according to the present invention is laminated, and pressing the center of the uppermost plywood by the center pressing means. The plywood bending means for adsorbing the uppermost plywood surface on both sides of the center pressurizing means and then raising both sides of the uppermost plywood upwards to separate the uppermost plywood from the laminated plywood underneath and the separated uppermost plywood in the hot press direction. It can be seen that it includes a plywood input means for pushing.

As shown in FIGS. 5A to 5F, the center pressurizing means is disposed above the stacked cold press plywood 5 and has a center pressurizing cylinder 23 in which a piston rod is lifted in an up and down direction, and the center pressurizing cylinder 23. It may be composed of a pressing head 25 attached to the front end of the piston rod to press the center of the uppermost plywood when the piston rod of the center pressure cylinder 23 is lowered. The center pressurizing cylinder 23 is fixed to the movable beam 11 to move up and down together with the movable beam 11. The plywood bending means is provided on both sides of the center pressurizing cylinder 23, the pad driving cylinders 13a and 13b disposed above the stacked cold press plywood 5 and the piston rod is lifted in the vertical direction, and the stacked cold. Suction pads 19a and 19b disposed one by one on both sides of the center pressurizing cylinder 23 above the crimped plywood 5 and hollowed inside, and air pipes 17a and 17b connected to upper ends of the suction pads 19a and 19b. ) And the piston rod ends of the pad driving cylinders 13a and 13b to the air pipes 17a and 17b to raise and lower the piston rods of the pad driving cylinders 13a and 13b. When the mounting plate 15 and the suction pads 19a and 19b are lowered and closely adhered to the uppermost plywood surface, the suction plate 19a and 17b sucks air through the air pipes 17a and 17b. 19b) a vacuum generator (VG in FIG. 1) for internal vacuuming, and the suction pad 19a , 19b) may be composed of air nozzles 21a and 21b that blow air to remove dust from the uppermost plywood surface before contacting the uppermost plywood surface. The pad driving cylinders 13a and 13b are connected to the movable beam 11 to move together with the movable beam 11. Upper ends of the adsorption pads 19a and 19b and lower ends of the air pipes 17a and 17b are coupled to be rotatable within a predetermined range.

1, 2, and 5a, the plywood feeding means includes a rail 43 arranged to travel in a hot press 300 direction above the stacked cold press plywood 5, and the rail 43. Plywood pusher (41a, 41b) and a plywood pusher (41a, 41b) having a hook shape that is coupled to the motion block 45 linear motion along the lower portion of the motion block 45 and bent in the direction of hot press 33 41b) is connected to the tip of the piston rod to move the plywood pusher 41a, 41b along the rail 43, the plywood pusher cylinder 47, and the top of the plywood that is moved by the plywood pusher 41a, 41b It can be seen that it may be composed of a feeding roller 59 for driving the lower surface in the hot press direction, and a feeding motor 61 for driving the feeding roller 59. 2 and 3, the rail 43, the motion block 45, and the plywood pusher cylinder 47 are attached to the lower part of the hanger 49 coupled to the movable beam 11 to enable the movable beam. Go up and down with (11).

1 and 2, the center pressurizing cylinder 23, the pad driving cylinders 13a and 13b, and the plywood pusher cylinder 47 may all use a hydraulic cylinder, but it is preferable to use a pneumatic cylinder. In the case of using a pneumatic cylinder, the compressed air AR generated by the air compressor is controlled by the compressed air control unit AC to be used in the air nozzles 21a and 21b as well as the center pressurizing cylinder 23 and the pad driving cylinder. 13a and 13b and the plywood pusher cylinder 47 can be used.

FIG. 4 is a front view showing only a part of the apparatus assembled to the rear columns 7c and 7d in the plywood hot press auto feeder shown in FIGS. 1 and 2.

1, 2 and 4, the rails 57 and the rails 57 are arranged in the intermediate fixed beam 77 of the rear columns 7c and 7d to travel in the pallet stacking 200 direction. A linear motion along the motion block 55, a pallet pusher 51 coupled to the bottom of the motion block 55 and the hook shape is bent in the lower direction toward the pallet stacker 200, and a piston in the pallet pusher 51 A pallet discharge means comprising a pallet pusher cylinder 53 for connecting the tip of the rod to move the pallet pusher 51 along the rail 57 is provided.

The pallet discharging means is driven to discharge the pallet 3 into the pallet stacker 200 after all of the plywood 5 is put into the hot press 300 while the lift 1 is gradually lifted. There is a need for a pallet identifying means for distinguishing between and pallet (3).

1 and 5A, the surface color and weight of the plywood 5 and the pallet 3 are different, and the plywood 5 and the pallet 3 are moved by the color sensor 81 and the weight sensor 18. Differentiation methods can be used. The color sensor 81 detects the color of the surface of the plywood 5 every time the sheet of plywood 5 is input to the hot press 300 one by one, and if the detected color is different from the color of the plywood 5, the pallet ( 3) by driving the pallet discharge means to discharge the pallet 3 to the pallet stacker 200.

In addition, the weight sensor 18 is also attached to the air pipes 17a and 17b connected to the suction pads 19a and 19b to sense the weight of the panel adsorbed by the suction pads 19a and 19b as pallet identification means. Can also be used. Through-holes are formed at the installation positions of the air pipes 17a and 17b of the mounting plate 15. After inserting the sleeve 28 into the through-holes, the air pipes 17a and 17b are slidable in the sleeve 28. It is installed, the fixing plate 22 is fixed to the air pipe (17a, 17b) is installed on the top of the air pipe (17a, 17b), the weight sensor 18 is attached between the fixing plate 22 and the mounting plate (15). On the opposite side of the weight sensor 18, a head is attached to the fixing plate 22 and a body is installed with a guide pin 20 to prevent the air pipes 17a and 17b from being separated while sliding through the mounting plate 15. . Preferably, a spring 24 is provided between the upper end of the sleeve 28 and the fixing plate 22. The lower end of the air pipes (17a, 17b) is formed with a step, and a spring is also installed between the lower end of the sleeve 28 and the step so that the suction pad (19a, 19b) is attached to the plywood surface to give an adhesive force.

2 and 4, it is seen that the upper part of the feeding roller 59 is provided with a plywood thickness measuring means capable of measuring the thickness of the cold press plywood 5 which is pushed to the hot press side by the feeding roller 59. Can be. The plywood thickness measuring means includes a levitation roller 61 supporting the plywood thickness upward when the plywood passes the feeding roller 59, a roller holder 63 supporting the levitation roller 63, and the roller holder 63. When the lifting shaft 65 protrudes from the upper end and is slidably inserted into the roller holder 67, the movable piece 66 provided on the lifting shaft upper part and the movable piece 69 approach within a predetermined range, It comprises a proximity sensor 69 for emitting a predetermined electrical signal. Preferably, a spring is interposed between the roller holder 63 and the roller holder 67. The proximity sensor 69 is installed to operate when two or more pieces of plywood pass between the feeding roller 59 and the support roller 61. In this way, when the thickness of the cold press plywood 5 pushed toward the hot press side exceeds the thickness of one sheet of plywood, the feeding roller 59 can be reversely rotated to return to the cold press plywood 5 lamination position. . The plywood, which has returned to its original position, is separated and reloaded one by one.

A cold press plywood input process by the plywood hot press auto feeder of the present invention having such a configuration will be described with reference to FIGS. 5A to 5F.

5a to 5f is an operation diagram illustrating a method of separating the cold press plywood one by one according to the present invention and put it in a hot press.

FIG. 5A is a waiting step, in which a color sensor 81 distinguishes colors of the uppermost panel and determines whether it is plywood or pallet.

5B is a cleaning step, before the adsorption pads 19a and 19b are lowered, the adsorption points by the adsorption pads 19a and 19b on the surface of the plywood are cleaned by the air nozzles 21a and 21b.

5C is a plywood pick-up step, in which the piston rods of the pad driving cylinders 13a and 13b and the piston rods of the center pressurizing cylinder 23 extend and the suction pads 19a and 19b and the pressing head are placed on the top plywood surface. In close contact with the vacuum generator, the inside of the suction pads 19a and 19b is vacuumed to strongly grip the plywood.

FIG. 5D illustrates a plywood bending step in which the piston rods of the pad driving cylinders 13a and 13b are contracted while the piston rods of the center pressurizing cylinder 23 are maintained. At this time, the vacuum state is maintained as it is. At this time, as shown in Fig. 5d, in the initial stage of bending, not only the top plywood but also the lower plywood may be bent together according to the amount of paste flowing down, but as the degree of bending increases, slippage occurs at the adhesive surface of the plywood. At the edges the bonds are separated from each other.

5E, in the separation step between the uppermost plywood and the underlay, as the ascending degree of the suction pads 19a and 19b increases, the underlay is separated from the uppermost plywood, and the uppermost plywood remains attached to the absorption pads 19a and 19b.

5F is a center pressure removal and input step, in which the piston rod of the center pressure cylinder 25 is contracted, and the uppermost plywood is unfolded horizontally, and in this state, the plywood is pushed toward the hot press by the plywood pushers 41a and 41b. .

As described above, the present invention is to separate the cold-compressed plywood laminated in multiple layers one by one and put into the hot press.

6a to 6e is an operation diagram showing a method for discharging the pallet laid on the bottom of the cold press plywood according to the present invention.

FIG. 6A is a cleaning step. When the top panel is identified as a pallet by the color sensor in FIG. 5A, first, the suction points of the pallet surface are cleaned by the air nozzles 21a and 21b.

6B is a pallet reconfirmation step, in which the suction pads 19a and 19b are lowered to grasp the pallet surface, and then the pallet is reconfirmed by the weight sensor 18. At this time, the center pressure cylinder 23 does not operate.

6C to 6E illustrate the pallet ejection step, in which the piston rods of the pad driving cylinders 13a and 13b are contracted so that the position of the pallet 3 is raised to the height of the pallet pusher 51 and the pallet pusher cylinder 53 is opened. By driving, the pallet 3 is discharged to the pallet stacker 200.

By doing so, it is possible to automate plywood feeding into the hot press while preventing pallets from entering the hot press.

1 is a front view of the plywood hot press auto feeder and pallet discharge bin according to the present invention.

FIG. 2 is a side view of the plywood hot press auto feeder shown in FIG. 1 together with the plywood introduction conveyor.

FIG. 3 is a plan view showing only a part of the apparatus assembled to the front column in the plywood hot press auto feeder shown in FIGS. 1 and 2.

FIG. 4 is a front view showing only a part of the apparatus assembled to the rear column in the plywood hot press auto feeder shown in FIGS. 1 and 2.

5a to 5f is an operation diagram illustrating a method of separating the cold press plywood one by one according to the present invention and put it in a hot press.

6a to 6e is an operation diagram showing a method for discharging the pallet laid on the bottom of the cold press plywood according to the present invention.

                  Explanation of symbols on the main parts of the drawings

1: lift 3: pallet

5: cold press plywood 7a, 7b, 7c, 7c: column

9a, 9b, 9c: upper beam 11: movable beam

13a, 13b: Pad drive cylinder 15: Mounting plate

17a, 17b: air pipe 18: weight sensor

19a, 19b: adsorption pad 20: guide pin

21a, 21b: Air nozzle 23: Center pressure cylinder

24: spring 25: crimping head

27a, 27b: carrier 29: chain

31a, 31b, 31c: Sprocket 33: Lifting motor

35: long axis 37: journal

39: arm 41a, 41b: plywood pusher

43: rail 45: motion block

47: plywood pusher cylinder 49: hanger

51: Pallet Pusher 53: Pallet Pusher Cylinder

55: motion block 57: rail

61: flotation roller 63: roller holder

65: lifting shaft 66: movable piece

67: roller holder 69: proximity sensor

71: spring 73: weight collection

75: weight 77: fixed beam

79: plywood feeding conveyor 81: color sensor

83: Plywood Conveyor

Claims (4)

A center pressurizing cylinder disposed above the stacked cold press plywood and attached to the piston rod end of the center pressurizing cylinder in a vertical direction; and when the piston rod of the center pressurizing cylinder descends, A center pressurizing means configured to press the central surface of the uppermost plywood of the cold press plywood laminated with a pressing head configured to press downward; A pad driving cylinder disposed above the laminated cold press plywood and having a piston rod ascending upward and downward, an adsorption pad disposed above the laminated cold press plywood and having a hollow inside, an air pipe connected to an upper end of the adsorption pad; A mounting plate for connecting the tip of the piston rod of the pad driving cylinder to the air pipe to allow the suction pad to move up and down when the piston rod of the pad driving cylinder moves up and down; And a vacuum generator which sucks air through the air pipe to make the inside of the suction pad into a vacuum state, and an air nozzle that blows out the dust on the uppermost plywood surface before the suction pad is in close contact with the uppermost plywood surface. While pressing the center of the uppermost plywood with the center pressurizing means at both sides of the center pressurizing means Plywood bending means for separating the uppermost plywood from the laminated plywood by lowering both sides of the uppermost plywood after adsorbing the upper plywood surface; And A rail disposed to travel in the hot press direction above the stacked cold press plywood, a motion block linearly moving along the rail, a plywood pusher coupled to a lower portion of the motion block and having a hook shape, and a piston to the plywood pusher A plywood pusher cylinder for connecting the tip of the rod to move the plywood pusher along the rail, a feeding roller for pushing the lower surface of the uppermost plywood moved by the plywood pusher in the hot press direction, and a feeding motor for driving the feeding roller. It consists of, plywood input means for pushing the uppermost plywood separated by the plywood bending means in the hot press direction; plywood hot press auto feeder comprising a. The method of claim 1, The plywood hot press auto feeder, characterized in that the upper end of the suction pad of the plywood bending means and the lower end of the air pipe is coupled to enable rotation. The method of claim 1, The bottom of the laminated cold-compressed plywood is laid with a pallet having a different surface color or weight from the cold-compressed plywood, and a color sensor or a weight sensor is provided above the laminated cold-compressed plywood, and the cold-pressed plywood And identifying the compressed plywood and the pallet and discharging the pallet toward a pallet stacking box provided separately from the hot press. According to claim 1, Plywood thickness measuring means for measuring the thickness of the cold-pressed plywood that is pushed to the hot press side by the feeding roller on the top of the feeding roller of the plywood input means, the cold pressing is pushed toward the hot press side The plywood hot press auto feeder, if the thickness of the plywood exceeds the thickness of one sheet of plywood, the feed roller is rotated to the original position to the cold-compressed plywood stacking position.

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