Ultrasonic detecting and sorting production line for plywood

Abstract

The invention is suitable for the technical field of plywood production, and provides a plywood ultrasonic detecting and sorting production line which comprises a lifting conveyor, a broken edge screening machine, a plate bending machine, an ultrasonic detecting machine and a stacking conveyor. Wherein the lifting conveyor is used for lifting plywood from the ground rail conveyor and conveying the plywood to the broken edge screening machine; the broken edge screening machine is used for detecting the edge of the plywood; the plate bending machine comprises a second machine frame, the two ends of the second machine frame are each provided with a pair of conveying rollers, a plurality of pressing rollers are arranged between the two pairs of conveying rollers, and an adjusting screw rod is further arranged on the second machine frame. An ultrasonic detector is arranged in the ultrasonic detector; and a plurality of groups of stacking conveyors are arranged side by side. According to the device, the plywood can be conveyed, detected and stacked in the form of a production line, meanwhile, stress bending and ultrasonic internal detection are conducted on the plywood, and the detection efficiency and accuracy of the plywood are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of plywood production technology, and particularly relates to a plywood ultrasonic testing and sorting production line. Background Technology

[0002] Plywood is a commonly used material in furniture making and one of the three major types of engineered wood products. It is also used in aircraft, ships, trains, automobiles, construction, and packaging. A set of veneers is typically glued together with adjacent layers of wood grain perpendicular to each other. The face veneer and inner veneer are usually symmetrically arranged on both sides of the core layer. The plywood is made by pressing a board blank, with the glued veneers arranged in a crisscross pattern according to the wood grain direction, under heat or other suitable conditions.

[0003] Plywood is formed through hot pressing. During the hot pressing process, due to various reasons, unbonded areas may form air bubbles inside the plywood, causing the plywood to fail to meet the stress requirements of national standards. The current testing method involves manual tapping and identification, with experienced employees listening to the sound after tapping. This technique has too much randomness and error. Therefore, there is a need for an automated device to test whether plywood meets the standards. Summary of the Invention

[0004] The purpose of this invention is to provide an ultrasonic testing and sorting production line for plywood, which aims to solve the problems mentioned in the background art.

[0005] This invention is implemented as follows: a plywood ultrasonic testing and sorting production line includes a lifting conveyor, an edge screening machine, a bending machine, an ultrasonic testing machine, and a palletizing conveyor; wherein: A ground rail conveyor is provided on one side of the lifting conveyor, and the edge screening machine is located on the side of the lifting conveyor away from the ground rail conveyor. The lifting conveyor is used to lift and transport the plywood from the ground rail conveyor to the edge screening machine. The edge screening machine includes a screening mechanism that detects the edges of plywood. The screening mechanism is equipped with a second push plate mechanism for conveying the plywood, and also includes a flipping mechanism. The bending machine is located on the side of the edge crushing and screening machine away from the lifting conveyor, and the bending machine and the edge crushing and screening machine are connected by a transition conveyor. The bending machine includes a second frame, with a pair of conveying rollers at each end of the second frame, and several pressure rollers between the two pairs of conveying rollers. The second frame is also equipped with adjusting screws for adjusting the height of each pressure roller. The ultrasonic testing machine is located on the side of the bending machine away from the transition conveyor, and the ultrasonic testing machine is equipped with an ultrasonic testing instrument for testing plywood. The palletizing conveyor is located on the side of the ultrasonic testing machine away from the bending machine, and multiple sets of the palletizing conveyors are arranged side by side along the conveying direction of the ultrasonic testing machine. Each set of palletizing conveyors has a whole pallet output machine below it.

[0006] In a further technical solution, the lifting conveyor includes a first frame, on which a lifting mechanism for lifting plywood is provided, and at the top of the first frame a first pusher mechanism for conveying plywood to the edge screening machine.

[0007] In a further technical solution, the ultrasonic testing machine also includes a conveyor wheel, a pressure wheel is provided above the conveyor wheel, a mounting frame is symmetrically arranged in the middle of the ultrasonic testing machine, and the ultrasonic testing instrument is mounted on the mounting frame.

[0008] In a further technical solution, five palletizing conveyors are installed at the rear of the ultrasonic testing machine.

[0009] This invention provides an ultrasonic testing and sorting production line for plywood. This device can realize the conveying, testing and stacking of plywood in the form of a production line, and at the same time perform stress bending and ultrasonic internal testing on the plywood. It has a high degree of automation and greatly improves the testing efficiency and accuracy of plywood. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a plywood ultrasonic testing and sorting production line provided in an embodiment of the present invention; Figure 2 This invention provides a schematic diagram of the structure of a lifting conveyor and a lint screening machine in an ultrasonic testing and sorting production line for plywood, as shown in an embodiment of the invention. Figure 3 This is a schematic diagram of the structure of a plywood ultrasonic testing and sorting production line, including a bending machine, an ultrasonic testing machine, a palletizing conveyor, and a stacking output machine, provided for an embodiment of the present invention.

[0011] In the attached diagram: 1. Ground rail conveyor; 2. Lifting conveyor; 21. First frame; 22. Lifting mechanism; 23. First push plate mechanism; 3. Edge crushing and screening machine; 31. Screening mechanism; 32. Second push plate mechanism; 33. Tilting mechanism; 4. Transition conveyor; 5. Bending machine; 51. Second frame; 52. Pressure roller; 53. Conveying roller; 54. Adjusting screw; 6. Ultrasonic testing machine; 61. Conveying wheel; 62. Pressure roller; 63. Mounting frame; 7. Palletizing conveyor; 8. Stacking output machine. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0013] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0014] like Figure 1-3 As shown, an ultrasonic testing and sorting production line for plywood according to an embodiment of the present invention includes a lifting conveyor 2, an edge screening machine 3, a bending machine 5, an ultrasonic testing machine 6, and a palletizing conveyor 7; wherein: The lifting conveyor 2 is provided with a ground rail conveyor 1 on one side, and the edge screening machine 3 is provided on the side of the lifting conveyor 2 away from the ground rail conveyor 1. The lifting conveyor 2 is used to lift the plywood from the ground rail conveyor 1 and transport it to the edge screening machine 3. The edge screening machine 3 includes a screening mechanism 31, which detects the edges of the plywood. The screening mechanism 31 is provided with a second push plate mechanism 32 for conveying the plywood, and the screening mechanism 31 is also provided with a flipping mechanism 33. The bending machine 5 is located on the side of the edge crushing and screening machine 3 away from the lifting conveyor 2, and the bending machine 5 and the edge crushing and screening machine 3 are connected by a transition conveyor 4. The bending machine 5 includes a second frame 51, and a pair of conveying rollers 53 are respectively provided at both ends of the second frame 51. Several pressure rollers 52 are provided between the two pairs of conveying rollers 53, and the second frame 51 is also provided with an adjusting screw 54 for adjusting the height of each pressure roller 52. The ultrasonic testing machine 6 is located on the side of the bending machine 5 away from the transition conveyor 4, and the ultrasonic testing machine 6 is equipped with an ultrasonic testing instrument for testing plywood. The palletizing conveyor 7 is located on the side of the ultrasonic testing machine 6 away from the bending machine 5, and multiple sets of the palletizing conveyor 7 are arranged side by side along the conveying direction of the ultrasonic testing machine 6. Each set of palletizing conveyors 7 is equipped with a pallet output machine 8 below it.

[0015] In this embodiment of the invention, during use, the entire stack of plywood is transported by a forklift to the ground rail conveyor 1, and then transported by the ground rail conveyor 1 to the lifting conveyor 2. The lifting conveyor 2 can sequentially feed the plywood into the edge screening machine 3. The screening mechanism 31 can identify plywood with damaged edges, and then the flipping mechanism 33 removes the plywood with damaged edges. Plywood with intact edges is transported by the upper second push plate mechanism 32 to the transition conveyor 4, and then the transition conveyor 4 feeds the plywood into the bending machine 5. The bending machine 5 is used to perform bending tests on the plywood and to release stress on boards with internal damage, which is convenient for the next step of ultrasonic testing. Specifically, the conveyor roller 53 in the bending machine 5 is used to convey plywood. When the plywood passes through the pressure roller 52, the height of the corresponding pressure roller 52 can be adjusted by adjusting the screw 54, so that the plywood can be bent. Then the plywood is conveyed to the ultrasonic testing machine 6, and the ultrasonic testing machine 6 performs ultrasonic testing on the plywood to determine the distribution of air bubbles and voids in the board. The control system grades the tested plywood for subsequent grading and stacking.

[0016] like Figure 1 and 2 As shown, in a preferred embodiment of the present invention, the lifting conveyor 2 includes a first frame 21, on which a lifting mechanism 22 for lifting plywood is provided, and a first pusher mechanism 23 for conveying plywood to the edge screening machine 3 is also provided on the top of the first frame 21.

[0017] In this embodiment of the invention, when in use, the lifting mechanism 22 can lift the plywood conveyed by the ground rail conveyor 1 to the top position of the first frame 21, and then the first push plate mechanism 23 can convey the lifted plywood to the edge screening machine 3 for testing.

[0018] like Figure 1 and 3 As shown, in a preferred embodiment of the present invention, the ultrasonic testing machine 6 further includes a conveyor wheel 61, a pressure wheel 62 is provided above the conveyor wheel 61, and a mounting frame 63 is symmetrically arranged in the middle of the ultrasonic testing machine 6, and the ultrasonic testing instrument is mounted on the mounting frame 63.

[0019] In this embodiment of the invention, during use, the conveyor wheel 61 is used to convey the plywood, the pressure wheel 62 is used to press the plywood, and the ultrasonic detector is symmetrically installed on the upper and lower sides of the plywood through the mounting frame 63, thereby detecting air bubbles and voids in the plywood.

[0020] In a preferred embodiment of the present invention, five palletizing conveyors 7 are provided at the rear of the ultrasonic testing machine 6. After the control system sorts the inspected plywood into grades, the conveying mechanisms of each palletizing conveyor 7 transport the plywood to the corresponding grade's palletizing station for palletizing. The palletizing conveyor 7 transports the entire stack of plywood, once it reaches the set height, to the stack output machine 8, which then transports the entire stack of plywood to a machine-free area where it is removed by a forklift for subsequent processing.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A production line for the ultrasonic testing and sorting of plywood, characterized in that it comprises: This includes lifting conveyors, edge-shredding screening machines, plate bending machines, ultrasonic testing machines, and palletizing conveyors; among which: A ground rail conveyor is provided on one side of the lifting conveyor, and the edge screening machine is located on the side of the lifting conveyor away from the ground rail conveyor. The lifting conveyor is used to lift the plywood from the ground rail conveyor and transport it to the edge screening machine. The edge screening machine includes a screening mechanism that detects the edges of plywood. The screening mechanism is equipped with a second push plate mechanism for conveying the plywood, and also includes a flipping mechanism. The bending machine is located on the side of the edge crushing and screening machine away from the lifting conveyor, and the bending machine and the edge crushing and screening machine are connected by a transition conveyor. The bending machine includes a second frame, with a pair of conveying rollers at each end of the second frame, and several pressure rollers between the two pairs of conveying rollers. The second frame is also equipped with adjusting screws for adjusting the height of each pressure roller. The ultrasonic testing machine is located on the side of the bending machine away from the transition conveyor, and the ultrasonic testing machine is equipped with an ultrasonic testing instrument for testing plywood. The palletizing conveyor is located on the side of the ultrasonic testing machine away from the bending machine, and multiple sets of the palletizing conveyor are arranged side by side along the conveying direction of the ultrasonic testing machine.

2. The plywood ultrasonic testing and sorting production line according to claim 1, characterized in that, The lifting conveyor includes a first frame, on which a lifting mechanism for lifting plywood is provided, and at the top of the first frame a first pusher mechanism for conveying plywood to the edge screening machine.

3. The plywood ultrasonic testing and sorting production line according to claim 1, characterized in that, The ultrasonic testing machine also includes a conveyor wheel, a pressure wheel is provided above the conveyor wheel, and a mounting frame is symmetrically arranged in the middle of the ultrasonic testing machine, and the ultrasonic testing instrument is mounted on the mounting frame.

4. The plywood ultrasonic testing and sorting production line according to claim 1, characterized in that, Five palletizing conveyors are installed at the rear of the ultrasonic testing machine.

5. The plywood ultrasonic testing and sorting production line according to claim 1, characterized in that, Each set of palletizing conveyors is equipped with a pallet output machine below it, which is used to transfer the plywood that has been palletized by the palletizing conveyor.

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