A performance testing device for plywood

Abstract

The present invention relates to the field of plywood testing, and in particular to a performance testing device for plywood, comprising: a box body for storing a tested object; a water guide mechanism comprising a water supply box body mounted on the surface of the box body and used to deliver an external water source into the box body in a working state; a coordination mechanism comprising an oriented board arranged inside the box body, a drive motor being provided on the surface of the oriented board, coordination rods being provided on both sides of the surface of the oriented board near a center line of the oriented board, one end of the coordination rod being fixedly connected to an output end of the drive motor; and an equidistant component being provided on the surface of the coordination rod body and used to position the tested object inside the box body in a working state. The water guide mechanism, the coordination mechanism and the auxiliary mechanism are arranged, and first, the plywood tested object is subjected to an immersion treatment and a humid environment simulation for different water resistance tests, and the bonding strength and dimensional stability of the plywood are tested by simulating the extreme humid conditions.

Description

Technical Field

[0001] The invention relates to the field of plywood detection, in particular to a performance detection device for plywood. Background Art

[0002] The plywood performance testing device is mainly used to comprehensively evaluate the various performance indicators of plywood to ensure that it can meet the expected performance requirements in actual applications, thereby ensuring the key factors of plywood dimensional stability, strength performance and subsequent processing performance;

[0003] At present, when it is necessary to conduct performance testing on plywood, it is necessary to conduct water resistance testing on the board to test the bonding strength and dimensional stability of the plywood. By understanding the performance of plywood in a humid environment, if the product shows warping, expansion, etc., it is considered an unqualified product. In actual operation, personnel are required to cut the board and measure the original thickness, and then soak it or simulate the humid environment. Then, the average value of the water absorption thickness expansion rate of the measuring point of the board is calculated to obtain the final thickness expansion rate result. Affected by plywood of different materials, personnel are required to make corresponding adjustments. Frequent adjustments will consume too much manpower, and improper operation will also cause the test pieces cut from the board to absorb water unevenly, resulting in deformation and damage during the water absorption process. When this erroneous operation occurs, it will directly cause the test piece to deform or be damaged, interfering with the interpretation of the test results. Summary of the Invention

[0004] In view of the above-mentioned problem or the problem in the prior art that the expansion thickness is difficult to detect, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a performance testing device for plywood.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising: a box body for storing the object to be detected; a water guiding mechanism comprising a water delivery box body installed on the surface of the box body, which is used to deliver an external water source into the interior of the box body in a working state; a coordination mechanism comprising a directional plate arranged inside the box body, a drive motor being provided on the surface of the directional plate, and coordination rod bodies being provided on both sides of the surface of the directional plate near the center line of the directional plate, wherein one end of the coordination rod body is fixedly connected to the output end of the drive motor; an equidistant component being arranged on the surface of the coordination rod body, which is used to position the object to be detected inside the box body in a working state; an auxiliary mechanism being arranged on the surface of the equidistant component, which is used to fix the object to be detected and cooperate with the water guiding mechanism to simulate or immerse the object to be detected in a humid environment; and a measuring mechanism being arranged on the surface of the auxiliary mechanism, which is used to measure the water absorption expansion coefficient of the object to be detected in a working state.

[0007] As a preferred solution of the plywood performance testing device of the present invention, a water inlet pipe is provided on the surface of the water supply box, matching boxes are provided on both sides of the water supply box, and a plurality of water outlet pipes are fixedly connected to the interior of each matching box. A plurality of water holes are provided on the surface of the water outlet pipe close to the coordination mechanism, and an atomizing nozzle is fixedly connected through the water holes.

[0008] As a preferred embodiment of the plywood performance testing device of the present invention, the surface of the coordinating rod body is connected to another coordinating rod body through a transmission belt, a carrier plate is provided on the surface of the oriented board near one side of each coordinating rod body, a limiting plate is embedded in the carrier plate, a surface of the limiting plate is provided with several groups of racks, and a surface of the coordinating rod body is respectively provided with several groups of first notches and one second notch.

[0009] As a preferred solution of the plywood performance testing device of the present invention, the equidistant component includes an equidistant block arranged on the surface of the coordination rod body, a limiting column is arranged inside the equidistant block, and the limiting column is slidably connected to the first notch and the second notch.

[0010] As a preferred embodiment of the plywood performance testing device of the present invention, the auxiliary mechanism includes a polygon arranged on the surface of an equidistant block, an elevated rod is provided at the end of the polygon, the end of the elevated rod is rotatably connected to a rotating part, a loading block is provided on the surface of the elevated rod, a first spring is fixedly connected to the interior of the loading block, an empty cylinder is provided at the end of the first spring, and a second sphere is provided in the empty cylinder on the side away from the first spring.

[0011] As a preferred solution of the plywood performance testing device of the present invention, the rotating member includes a first coordinating tooth rotatably connected to the end of the elevated rod body, the end of the first coordinating tooth is fixedly connected to a folding rod, and a first sphere is provided in the folding rod at one end away from the first coordinating tooth.

[0012] As a preferred solution of the plywood performance testing device of the present invention, the first coordinating teeth are engaged with a plurality of racks provided on the surface of the limiting plate, and the first sphere and the second sphere are located on the same vertical line with the ground as the center of gravity.

[0013] As a preferred solution of the plywood performance detection device of the present invention, the measuring mechanism includes a data display arranged on the surface of the polygon, a sensor is arranged on the surface of the data display, and a laser emitter is arranged at the end of the data display.

[0014] The beneficial effects of the plywood performance testing device of the present invention are as follows: by setting up a water guide mechanism, a coordination mechanism, and an auxiliary mechanism, the plywood test object is first subjected to an immersion treatment and a humid environment simulation according to its different water resistance properties. By simulating such extreme humid conditions, the bonding strength and dimensional stability of the plywood are tested;

[0015] Furthermore, different plywood test objects require different cut lengths, but all require fixed-point measurement on the surface of the test object. Through the setting of the auxiliary mechanism, after the test object enters the interior of the box, its position is adjusted up and down synchronously to facilitate subsequent measurement of the expansion coefficient. At the same time, the first coordination tooth and the limiting plate are used in conjunction with each other. While the first coordination tooth is synchronously expanding and positioning, the folding rod rotates to fix the test object and prevent it from falling off.

[0016] Furthermore, the object to be tested is clamped by the vertically arranged second sphere and the first sphere and then placed in water for immersion. At the same time, due to the small contact area of ​​the sphere, the contact surface between the object to be tested and it is reduced while the object to be tested is positioned. The greater the contact, the more uneven the water absorption of the object to be tested will be. Therefore, the object to be tested can be under the same water absorption conditions as much as possible during the testing process, thereby improving the accuracy and repeatability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 The figure is a schematic diagram of the overall structure of a performance testing device for plywood.

[0019] Figure 2 This is a schematic diagram of the internal structure of a performance testing device for plywood.

[0020] Figure 3 This is a partial cross-sectional schematic diagram of a performance testing device for plywood.

[0021] Figure 4 The utility model relates to a coordination mechanism of a performance testing device for plywood.

[0022] Figure 5 This is a schematic diagram of the auxiliary mechanism and measuring mechanism of a plywood performance testing device.

[0023] Figure 6 This is a schematic diagram of a rotating part of a performance testing device for plywood.

[0024] Figure 7 The present invention is a partially isolated schematic diagram of a coordination mechanism of a performance testing device for plywood.

[0025] In the figure: 100, box body; 200, water guide mechanism; 201, water delivery box body; 202, matching box body; 203, water outlet pipe body; 300, coordination mechanism; 301, directional plate; 302, drive motor; 303, coordination rod body; 304, transmission belt; 305, carrier plate; 306, limiting plate; 307, first notch; 308, second notch; 311, equidistant block; 312, limiting column; 400, auxiliary mechanism; 401, polygon; 402, elevated rod body; 403, rotating part; 4031, first coordination tooth; 4032, folding rod; 4033, first sphere; 404, loading block; 405, first spring; 406, empty cylinder; 407, second sphere; 500, measuring mechanism; 501, data display; 502, sensor; 503, laser emitter. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] Reference Figures 1 to 7 , including, a box body 100, for storing the object to be detected, a water guide mechanism 200, including a water supply box 201 installed on the surface of the box body 100, and in working state, for delivering an external water source into the box body 100, a coordination mechanism 300, including an oriented plate 301 arranged inside the box body 100, a driving motor 302 is provided on the surface of the oriented plate 301, and coordination rods 303 are provided on the surface of the oriented plate 301 near the center line of the oriented plate 301, and one end of the coordination rod 303 is fixedly connected to the output end of the driving motor 302, an equidistant component, provided on the surface of the coordination rod 303, and in working state, for positioning the object to be detected inside the box body 100, an auxiliary mechanism 400, provided on the surface of the equidistant component, for locating the object to be detected, and cooperating with the water guide mechanism 200 to simulate or immerse the object to be detected in a humid environment, and a measuring mechanism 500, provided on the surface of the auxiliary mechanism 400, and in working state, for measuring the water absorption expansion coefficient of the object to be detected.

[0028] Specifically, an external water source is connected to the water supply box 201, and then the water source is delivered to the inside of the water outlet pipe 203 through the matching box 202 through the inside of the water supply box 201, and then sprayed out by the atomizing nozzle.

[0029] During use, the water hole of the water outlet pipe body 203 is opened vertically above the detection object, and is kept away from the internal electronic components as much as possible during use to extend the service life of the device. If necessary, the same water outlet pipe body 203 can be set below the detection object to simulate the strength and expansion coefficient of the detection object under extreme conditions.

[0030] It should be noted that the box body 100 is provided with two sealed doors that can be opened for inspection. When the sealed doors are closed, the water sprayed by the water guide mechanism 200 will not leak out.

[0031] A water inlet pipe is arranged on the surface of the water supply box 201, and matching boxes 202 are arranged on both sides of the water supply box 201. Several groups of water outlet pipes 203 are fixedly connected to the interior of each matching box 202. Several groups of water holes are opened on the surface of the water outlet pipe 203 close to the coordination mechanism 300, and an atomizing nozzle is fixedly connected through the water holes.

[0032] See Figure 7 The surface of the coordinating rod body 303 is connected to another coordinating rod body 303 through a transmission belt 304. A carrier plate 305 is provided on the surface of the directional plate 301 near one side of each coordinating rod body 303. A limiting plate 306 is embedded in the carrier plate 305. Several groups of racks are provided on the surface of the limiting plate 306. Several groups of first slots 307 and a second slot 308 are respectively opened on the surface of the coordinating rod body 303.

[0033] A water inlet pipe is provided on the surface of the water supply box 201, and a matching box 202 is provided on both sides of the water supply box 201. A plurality of water outlet pipes 203 are fixedly connected to the interior of each matching box 202. A plurality of water holes are provided on the surface of the water outlet pipe 203 near the side of the coordination mechanism 300, and atomizing nozzles are fixedly connected through the water holes.

[0034] Specifically, the second notch 308 is an arc notch, the first notch 307 is an inclined surface, and is symmetrically distributed with the second notch 308 as the center, and the number corresponds to the equidistant blocks 311. When the drive motor 302 drives one of the coordination rods 303 to work, the other coordination rod 303 is driven by the transmission belt 304. The equidistant blocks 311 in the second notch 308 at the center will not be displaced due to the rotation of the coordination rod 303, while the equidistant blocks 311 in the first notch 307 will be displaced. Driven by the limiting column 312 to expand outward at the same distance or approach synchronously, when the limiting column 312 inside the first slot 307 works, the equidistant block 311 changes. At the same time, the first coordinating tooth 4031 below the elevated rod 402 will rotate in a small range due to the rack on the limiting plate 306, so that the detection object is fastened by the folding rod 4032. The longer side of the detection object is fastened by each rotating folding rod 4032, while the shorter side, the folding rod 4032 will rotate past the right-angle side to fasten the shorter side.

[0035] It should be noted that the folding rod 4032 under the first coordinating tooth 4031 will only produce a significant rotation when it passes through the right angle between the long side and the short side of the detection object, but its rotation angle does not exceed 320 degrees. Under necessary conditions, the several groups of racks set on the limiting plate 306 can be equidistant and discontinuous, and the number is the number of the first coordinating teeth 4031 plus one. This setting is to enable the folding rod 4032 to better grasp the detection object. When the first coordinating tooth 4031 near the second slot 308 grasps the longer side of the detection object, the folding rod 4032 here stops working, and the folding rod 4032 farthest from the drive motor 302 will bypass the longest side and start rotating toward the short side of the detection object, and then grasp it.

[0036] Among them, the first spring 405 on the loading block 404 will push the empty cylinder 406 forward, so that the second sphere 407 fits the detection object, and the first sphere 4033 inside the rotating member 403 below will also fit the detection object, but the first sphere 4033 only rotates and does not rise or fall toward the center of gravity of the ground, while the second sphere 407 will be affected by the water absorption and expansion of the detection object and start to move toward the loading block 404. It is best to reduce the contact area between the detection object and the object, otherwise it will cause uneven expansion and deformation, and the contact surface will be restricted, resulting in uneven water absorption. When detecting the detection object, an original point position is required. As well as measuring the original thickness, the second sphere 407 and the first sphere 4033 will minimize the contact area with the test object, while allowing the test object to be suspended in the air to avoid contact with the inner wall of the device, and test the expansion coefficient of water absorption. The formula is D=(h2-h1) / h1×100%, that is, water absorption rate=mass after immersion-mass before immersion / mass before immersion×100%. The size of the water absorption rate directly reflects the water absorption capacity of the plywood test object. A lower water absorption rate means better water absorption performance and quality strength. If the water absorption rate exceeds the allowable range, it is judged as unqualified.

[0037] The water absorption and expansion test is carried out on the test pieces of multiple plywood cut from the same batch, and the expansion rate is then calculated. If the expansion difference is too large, the batch is judged as unqualified or exceeds the allowable range.

[0038] The equidistant assembly includes an equidistant block 311 disposed on the surface of the coordination rod 303 . A limiting column 312 is disposed inside the equidistant block 311 . The limiting column 312 is slidably connected to the first notch 307 and the second notch 308 .

[0039] The auxiliary mechanism 400 includes a polygonal body 401 arranged on the surface of the equidistant block 311, an elevated rod body 402 is arranged at the end of the polygonal body 401, the end of the elevated rod body 402 is rotatably connected to a rotating part 403, a loading block 404 is arranged on the surface of the elevated rod body 402, the interior of the loading block 404 is fixedly connected to a first spring 405, an empty cylinder 406 is arranged at the end of the first spring 405, and a second sphere 407 is arranged on the side of the empty cylinder 406 away from the first spring 405.

[0040] The rotating member 403 includes a first coordinating tooth 4031 rotatably connected to the end of the elevated rod 402 . The end of the first coordinating tooth 4031 is fixedly connected to a folding rod 4032 . A first sphere 4033 is provided at one end of the folding rod 4032 away from the first coordinating tooth 4031 .

[0041] The first coordinating teeth 4031 are engaged with a plurality of racks provided on the surface of the limiting plate 306 . The first sphere 4033 and the second sphere 407 are located on the same vertical line with the ground as the center of gravity.

[0042] Specifically, the loading block 404 and the first sphere 4033 are not only aligned with a vertical line, but the second sphere 407 is also aligned with the center axis of the first sphere 4033 , and the arrangement of the loading block 404 does not affect the distance measurement of the measuring mechanism 500 .

[0043] The measuring mechanism 500 includes a data display 501 disposed on the surface of the polygon 401 . A sensor 502 is disposed on the surface of the data display 501 . A laser emitter 503 is disposed at the end of the data display 501 .

[0044] Specifically, the laser emitter 503 emits a laser pulse to the object to be detected. The laser pulse hits the target and is reflected. The sensor 502 then receives the signal, and the data display 501 then displays the data.

[0045] It should be noted that in the case of batch testing, or under conditions of simulated immersion testing of the expansion coefficient, the measuring mechanism 500 can directly measure its initial thickness, and then intermittently measure the thickness of the test object when it is soaked and expanded, so as to count the different expansion thicknesses in different time periods. However, under normal circumstances, the measured immersion time is roughly around twenty-four hours.

[0046] The humid environment measurement method is as follows: first, the external water source is connected to the inside of the water supply box 201, and then intermittently sprayed through the water outlet pipe 203 so that the moisture mist can be evenly distributed on the surface of the test object. When immersion expansion testing is required, the water source needs to be continuously delivered to the inside of the box body 100 through the water outlet pipe 203, but the water source height must not be higher than the height of the loading block 404. Then, the following operations are started. DETAILED DESCRIPTION

[0048] The personnel places the detection object in the interval formed by the first sphere 4033 and the second sphere 407, and then the driving motor 302 starts to work, and the driving motor 302 drives the coordination rod body 303 to rotate. At this time, the coordination rod body 303 rotates, and the limiting column 312 inside the first notch 307 on the surface of the coordination rod body 303 drives the equidistant blocks 311 connected to it to start working. The equidistant blocks 311 controlled by the first notch 307 will expand outward synchronously to locate the upper and lower positions of the detection object. At the same time, the equidistant blocks 311 are restricted by the carrier plate 305, so that it can only move in a straight line. The folding rod 4032 works through the cooperation of the first coordinating teeth 4031 and the tooth plate, first buckling the long side of the detection object. Tighten, and then the short side is driven by the remaining first coordination teeth 4031 to rotate and tighten the folding rod 4032, so that the detection object is in a suspended state as much as possible, and then the laser emitter 503 emits a laser pulse to the detection object. The laser pulse hits the target and is reflected, and then the sensor 502 receives the signal, and then the data display 501 displays or records the data. This is the initial thickness. Close the box body 100, and inject water into the cavity of the box body 100 through the atomizing nozzle of the water hole. When the water level is higher than the detection object and lower than the loading block 404, the water injection stops. Then the laser emitter 503 detects the thickness of the detection object every two hours. After waiting for twenty-four hours, the personnel will calculate and process the data.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A plywood performance testing device, characterized in that: include; A box body (100) is used to store the object to be detected; The water guide mechanism (200) comprises a water delivery box (201) mounted on the surface of the box body (100), and is used to deliver water from an external source into the interior of the box body (100) in a working state; The coordination mechanism (300) comprises an oriented plate (301) arranged inside the box body (100), a driving motor (302) being arranged on the surface of the oriented plate (301), and coordination rods (303) being arranged on both sides of the surface of the oriented plate (301) near the center line of the oriented plate (301), wherein one end of the coordination rod (303) is fixedly connected to the output end of the driving motor (302); An equidistant component is provided on the surface of the coordination rod (303) and is used to locate the object to be detected inside the box (100) in a working state; An auxiliary mechanism (400) is provided on the surface of the isometric component and is used for positioning the object to be detected and cooperating with the water guide mechanism (200) to simulate or immerse the object in a humid environment; A measuring mechanism (500) is provided on the surface of the auxiliary mechanism (400) and is used to measure the water absorption expansion coefficient of the test object in a working state; The surface of the coordination rod body (303) is connected to another coordination rod body (303) through a transmission belt (304); a carrier plate (305) is provided on the surface of the directional plate (301) near one side of each coordination rod body (303); a limiting plate (306) is embedded in the carrier plate (305); a plurality of racks are provided on the surface of the limiting plate (306); and a plurality of first notches (307) and a second notch (308) are respectively provided on the surface of the coordination rod body (303); The isometric assembly comprises an isometric block (311) arranged on the surface of the coordination rod (303), a limiting column (312) is arranged inside the isometric block (311), and the limiting column (312) is slidably connected to the first notch (307) and the second notch (308); The auxiliary mechanism (400) comprises a polygon (401) arranged on the surface of an equidistant block (311); an elevated rod (402) is arranged at the end of the polygon (401); the end of the elevated rod (402) is rotatably connected to a rotating member (403); a loading block (404) is arranged on the surface of the elevated rod (402); a first spring (405) is fixedly connected to the interior of the loading block (404); an empty cylinder (406) is arranged at the end of the first spring (405); a second sphere (407) is arranged in the empty cylinder (406) on a side away from the first spring (405); The rotating member (403) includes a first coordinating tooth (4031) rotatably connected to the end of the elevated rod (402); the end of the first coordinating tooth (4031) is fixedly connected to a folding rod (4032); and a first sphere (4033) is provided in the folding rod (4032) at one end away from the first coordinating tooth (4031); The second notch (308) is an arc notch, and the first notch (307) is an inclined surface; The first coordinating teeth (4031) are meshed with a plurality of racks provided on the surface of the limiting plate (306), and the first sphere (4033) and the second sphere (407) are located on the same vertical line with the ground as the center of gravity.

2. The plywood performance testing device according to claim 1, characterized in that: A water inlet pipe is provided on the surface of the water delivery box (201), and matching boxes (202) are provided on both sides of the water delivery box (201). A plurality of water outlet pipes (203) are fixedly connected to the interior of each matching box (202), and a plurality of water holes are provided on the surface of the water outlet pipe (203) near the coordination mechanism (300), and an atomizing nozzle is fixedly connected through the water holes.

3. The plywood performance testing device according to claim 2, characterized in that: The measuring mechanism (500) comprises a data display (501) arranged on the surface of the polygon (401), a sensor (502) is arranged on the surface of the data display (501), and a laser emitter (503) is arranged at the end of the data display (501).

Images