A compression resistance detection device and method based on wood-plastic board production

Abstract

The application discloses a kind of compression detection equipment and method based on wood plastic board production, it is related to plate compression detection technical field, including bottom plate, the detection mechanism is arranged in the top of bottom plate, for detecting wood plastic board compression resistance, the detection mechanism includes: adjusting assembly, setting in the two sides of bottom plate, for adjusting the position of support assembly;Supporting component, including the side plate being fixed in the upper of adjusting assembly, the side plate is inserted and installed with support roller on one side, the lower push rod is fixed on the outside of side plate, adjusting assembly is laid in the two sides of bottom plate, can drive support assembly overall translation, freely change the support span of wood plastic board.Supporting component can switch flat, arc two kinds of support forms, can also be separately enabled unilateral support or double-side support, respectively simulate partial load, two kinds of real working conditions of uniform distribution, flexibly switch plate length and support boundary in air, completely get rid of the restriction of fixed span, accurately reproduce the stress state under different actual use scenarios of wood plastic board.

Description

Technical Field

[0001] This invention relates to the field of compressive strength testing technology for wood-plastic composite boards, specifically to a compressive strength testing device and method based on wood-plastic composite board production. Background Technology

[0002] Wood-plastic composites are a new type of environmentally friendly building material that combines wood fiber and modified polymer resin. They possess the texture and toughness of wood with the moisture-proof, corrosion-resistant, and deformation-resistant advantages of plastics. With the rapid development of the green building materials industry, the market's standardized requirements for the structural stability, load-bearing capacity, and safety of wood-plastic composite products are continuously increasing. Compressive strength, as a core mechanical indicator for measuring the structural strength, load-bearing limit, and long-term service stability of wood-plastic composites, is an important basis for product quality inspection, production process optimization, and industry compliance certification. It directly determines the reliability and service life of wood-plastic composites under various load conditions.

[0003] The existing invention patent with publication number CN119309936B discloses a composite fiber tensile testing device, which relates to the technical field of composite fiber tensile testing tools. It includes a platform and a gantry mounted on top of the platform. A test box is mounted above the mounting slot via a bracket. A lifting beam is slidably mounted on the upper part of the gantry. A tension sensor is mounted on the bottom surface of the lifting beam, and a pull rod is mounted on the bottom end of the tension sensor. A clamping mechanism is mounted on the mounting base. A movable seat is mounted on the drive seat of a linear motor, and a flame-spraying mechanism is mounted on the movable seat. This invention, through the cooperation of the clamping mechanism, the tension sensor, and the pull rod, facilitates effective clamping and fixing of the composite fiber being tested. It effectively prevents the composite fiber material from breaking at the clamping end during traditional chuck clamping testing. As the tension acting on the composite fiber increases, the clamping force of the locking shaft on the composite fiber belt automatically increases, effectively avoiding the composite fiber belt from loosening or breaking at the end due to excessive tensile force.

[0004] Based on the aforementioned existing technologies, in the field of strength testing of wood-plastic composite (PVC) boards, current testing equipment typically employs a fixed-span support structure combined with rigid loading to test the bending or compressive strength of the boards. However, this type of testing method has certain limitations: because the support span and loading contact conditions are usually fixed, it is difficult to effectively simulate the stress state under different actual service conditions, resulting in deviations between the test results and actual usage conditions; at the same time, the contact area and stress distribution of existing loading structures are relatively uniform, and cannot be effectively adjusted according to different specifications or testing requirements, thus affecting the rationality of stress distribution and the consistency of test results; furthermore, local stress concentration is prone to occur in the support contact area or loading contact area during testing, which in turn affects the authenticity of the overall stress state of the board and may cause the test results to deviate from the actual mechanical properties of the material. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a compressive strength testing device and method based on wood-plastic composite board production. This solves the problems of existing wood-plastic composite flooring strength testing methods that primarily employ fixed-span support and rigid loading, making it difficult to simulate the stress state under different actual working conditions. Furthermore, the contact area and stress distribution of the pressure loading structure are relatively simple, unable to be effectively adjusted according to different testing requirements, leading to unreasonable stress distribution. Additionally, the testing process is prone to localized stress concentration, affecting the overall stress accuracy of the board and reducing the consistency and accuracy of the test results.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a compressive strength testing device based on wood-plastic composite board production, comprising a base plate, and a testing mechanism disposed above the base plate for testing the compressive strength of the wood-plastic composite board, the testing mechanism comprising:

[0007] Adjustment components, located on both sides of the base plate, are used to adjust the position of the support components;

[0008] The support assembly includes a side plate fixed above the adjustment assembly. A support roller is inserted and installed on one side of the side plate. A downward push rod is fixed on the outer side of the side plate, and a pressure plate is fixedly installed on the movable end of the top of the downward push rod. A transmission push rod is fixedly installed between the side plates, and a transmission frame is fixedly installed on the movable end of the transmission push rod. A chain plate is connected to the top of the transmission frame, and connecting rings are embedded at both ends of the chain plate.

[0009] The pressing component, located at the center of the base plate, is used to press down the wood-plastic composite board.

[0010] Preferably, the adjustment assembly includes support rods fixedly installed on both sides of the base plate, a slide rail fixedly installed on the top of the support rods, a slider embedded inside the slide rail, a support plate fixedly installed above the slider, a motor fixedly installed between the support rods, a lead screw connected to the end of the motor shaft, and a threaded sleeve installed on the outside of the lead screw via threads.

[0011] Preferably, the support rods are installed in pairs at both ends of the base plate, the slider and the slide rail form a sliding connection, the support plate is slidably connected to the slide rail through the slider, and the threaded sleeve is fixedly installed at the center of the protruding structure at the bottom of the support plate.

[0012] Preferably, the side plates are symmetrically installed on both sides of the support plate, and the surface of the side plates is provided with a through groove with one end horizontal and the other end arc-shaped to limit the shape of the chain plate. The two ends of the support roller are rotatably connected to the side plates through bearings.

[0013] Preferably, the downward push rods are symmetrically installed on the outer side plates of both sides of the support plate, the pressure plate is installed at the connection between the horizontal structure and the arc structure of the side plate through groove, the bottom of the downward push rods is fixedly connected to the support plate, and the chain plate is provided with multiple pieces connected to each other by connecting rings, and the chain plate and the connecting rings form a rotatable connection.

[0014] Preferably, the connecting ring is fitted inside the through groove of the side plate and forms a sliding connection with the through groove. One end of the transmission frame is fixedly connected to a single chain plate, and the top of the transmission frame is flush with the top of the chain plate.

[0015] Preferably, the pressing component includes a ranging module fixedly installed at the center of the base plate. Supporting push rods are fixedly installed on both sides of the base plate. A limiting frame is fixedly installed at the top of the supporting push rod. A guide rail is fixedly installed on the inner side of the limiting frame, and a limiting block is embedded inside the guide rail. A limiting push rod is connected to the inner side of the limiting block. A clamping plate is fixedly installed at the movable end of the limiting push rod. An airbag is fixedly installed on the inner side of the clamping plate. A pressure sensor is connected above the airbag, and a pressure sensor is connected to the top of the airbag.

[0016] Preferably, the ranging module is oriented vertically upwards, the limiting frame is movably connected to the base plate via a support push rod, the limiting block is slidably connected to the guide rail, and the fixed end of the limiting push rod is fixedly connected to the limiting block.

[0017] Preferably, the clamps are symmetrically installed on both sides of the airbag, and the vertical structure of the clamps is fixedly connected to the airbag to limit the width of the airbag. The bottom end of the airbag is located below the bottom end of the clamps, and the pressure sensor passes through the pipe structure at the top of the airbag.

[0018] This invention also discloses a testing method for a compression testing device based on wood-plastic composite board production, comprising the following steps:

[0019] S1. Adjust the installation position of the support components by adjusting the components to change the support span of the wood-plastic composite board, and switch between single-sided support or double-sided support according to the test requirements, thereby constructing different basic stress boundary conditions.

[0020] S2. Support the wood-plastic composite board using the support components and adjust the shape of the support boundary; simultaneously, position and clamp the wood-plastic composite board.

[0021] S3. Adjust the contact area with the wood-plastic composite board by pressing down the detection component to adapt to different working conditions.

[0022] S4. By moving the entire pressure detection component downward, a flexible loading force is applied to the wood-plastic composite board, and the deformation and stress changes of the wood-plastic composite board are detected simultaneously, thereby completing the strength test process.

[0023] Beneficial effects

[0024] This invention provides a compressive strength testing device and method based on wood-plastic composite board production. Compared with the prior art, it has the following advantages:

[0025] 1. This compressive strength testing equipment and method based on wood-plastic composite board production solves this defect by relying on the cooperation of adjustment components and support components. The adjustment components are arranged on both sides of the base plate and can drive the support components to move as a whole, freely changing the support span of the wood-plastic composite board. At the same time, the support components can switch between straight and curved support forms, and can also use single-sided support or double-sided support to simulate two real working conditions: eccentric load and uniform distribution. It flexibly switches the board suspension length and support boundary, completely getting rid of the limitation of fixed span, and accurately replicating the stress state of wood-plastic composite board under different actual use scenarios.

[0026] 2. This compressive strength testing equipment and method based on wood-plastic composite board production achieves adjustable loading patterns through the coordinated operation of the pressing component and the support component, solving the problem of unreasonable stress distribution. Different support structures can be switched on the support side to change the stress distribution from the bottom of the board; the pressing loading part can adjust the lateral contact width of the flexible loading element to adapt to different board sizes and different test load requirements. The multi-form support at the support end, combined with the flexible structure with variable contact area at the loading end, can create various stress distribution patterns, no longer limited to a single loading mode. It can adjust the stress distribution on the upper and lower surfaces of the board according to test requirements, avoiding stress matching deviation problems caused by uniform loading.

[0027] 3. This device and method for testing the compressive strength of wood-plastic composite boards employs a flexible loading structure combined with multiple sets of limiting and auxiliary constraint structures to eliminate localized stress concentration defects and improve the reliability of test data. Traditional rigid loading components have hard contact with the board, which easily leads to single-point concentrated stress. This device uses flexible components as the direct loading medium, which can deform and conform to the board surface after being compressed, and the load is evenly distributed to the contact area, avoiding stress concentration caused by single-point compression. The lateral limiting structure can constrain the expansion range of the flexible loading component, ensuring a uniform contact area for each test. The overall lifting structure achieves slow and uniform loading, preventing instantaneous impact loads. At the same time, the upper and lower clamping structures clamp the wood-plastic composite board in both directions, limiting the lateral displacement of the board during loading and ensuring that the load always acts on the preset test area. The entire structure has uniform loading force and stable board positioning. The constraints and loading conditions are consistent for each test, restoring the true overall stress state of the board and effectively improving the consistency of multiple test results and the accuracy of test values. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the motor mounting structure of the present invention.

[0030] Figure 3 This is a schematic diagram of the connection and installation structure between the threaded sleeve and the support plate of the present invention.

[0031] Figure 4 This is a schematic diagram of the support roller installation structure of the present invention.

[0032] Figure 5 This is a schematic diagram of the connecting ring mounting structure of the present invention.

[0033] Figure 6 This is a schematic diagram of the chain plate bending structure of the present invention.

[0034] Figure 7 This is a schematic diagram of the installation structure of the ranging module of the present invention.

[0035] Figure 8 This is a schematic diagram of the connection structure between the limiting block and the guide rail of the present invention.

[0036] Figure 9 This is a schematic diagram of the airbag installation structure of the present invention.

[0037] Figure 10 This is a schematic diagram of the connection structure between the pressure sensor and the limiting frame of the present invention.

[0038] In the diagram: 1. Base plate; 2. Detection mechanism; 21. Adjustment component; 211. Support rod; 212. Slide rail; 213. Slider; 214. Support plate; 215. Motor; 216. Lead screw; 217. Threaded sleeve; 22. Support component; 221. Side plate; 222. Support roller; 223. Downward push rod; 224. Pressure plate; 225. Transmission push rod; 226. Transmission frame; 227. Chain plate; 228. Connecting ring; 23. Downward component; 231. Distance measuring module; 232. Support push rod; 233. Limiting frame; 234. Guide rail; 235. Limiting block; 236. Limiting push rod; 237. Clamping plate; 238. Airbag; 239. Pressure sensor; 2310. Air pressure sensor. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figure 1 - Figure 10 The present invention provides a technical solution:

[0041] A compressive strength testing device and method based on wood-plastic composite board production includes a base plate 1, and a testing mechanism 2 is arranged above the base plate 1 for testing the compressive strength of the wood-plastic composite board. The testing mechanism 2 includes:

[0042] Adjustment components 21 are disposed on both sides of the base plate 1 and are used to adjust the position of the support components 22. The adjustment components 21 include support rods 211 fixedly installed on both sides of the base plate 1. A slide rail 212 is fixedly installed on the top of the support rods 211, and a slider 213 is embedded inside the slide rail 212. A support plate 214 is fixedly installed above the slider 213. A motor 215 is fixedly installed between the support rods 211. A lead screw 216 is connected to the end of the shaft of the motor 215. A threaded sleeve 217 is threadedly installed on the outside of the lead screw 216. The support rods 211 are installed in pairs at both ends of the base plate 1. The slider 213 and the slide rail 212 form a sliding connection. The support plate 214 forms a sliding connection with the slide rail 212 through the slider 213. The threaded sleeve 217 is fixedly installed at the center of the protruding structure at the bottom of the support plate 214.

[0043] Specifically, the adjusting component 21 drives the lead screw 216 to rotate via the motor 215, causing the threaded sleeve 217 to undergo axial displacement under the threaded engagement of the lead screw 216, which in turn drives the support plate 214 to move synchronously along the slide rail 212. Under the guiding constraint of the slider 213 and the slide rail 212, the support plate 214 always maintains a stable translational state, thereby achieving synchronous adjustment of the distance between the two support components 22.

[0044] During the adjustment process, the support plate 214 serves as the mounting base for the support component 22. Its positional change directly alters the effective span between the support components 22, causing the wood-plastic composite board to form suspended areas of different lengths during subsequent loading, thereby achieving preset control of the bending stress conditions.

[0045] The support assembly 22 includes a side plate 221 fixed above the adjustment assembly 21. A support roller 222 is inserted and installed on one side of the side plate 221. A downward push rod 223 is fixed to the outer side of the side plate 221, and a pressure plate 224 is fixedly installed at the movable end of the top of the downward push rod 223. A transmission push rod 225 is fixedly installed between the side plates 221, and a transmission frame 226 is fixedly installed at the movable end of the transmission push rod 225. A chain plate 227 is connected to the top of the transmission frame 226, and connecting rings 228 are embedded at both ends of the chain plate 227. The side plates 221 are symmetrically installed on both sides of the support plate 214, and the surface of the side plate 221 is provided with a through groove with one end horizontal and the other end arc-shaped to limit the shape of the chain plate 227. The support roller 222 is rotatably connected to the side plate 221 through bearings at both ends. The pressure rod 223 is symmetrically installed on the outside of the side plate 221 on both sides of the support plate 214. The pressure plate 224 is installed at the connection between the horizontal structure and the arc structure of the through groove of the side plate 221. The bottom of the pressure rod 223 is fixedly connected to the support plate 214. Multiple chain plates 227 are connected to each other through connecting rings 228. The chain plates 227 and the connecting rings 228 are rotatably connected. The connecting rings 228 are embedded in the through groove of the side plate 221 and are slidably connected to the through groove. One end of the transmission frame 226 is fixedly connected to a single chain plate 227, and the top of the transmission frame 226 is flush with the top of the chain plate 227.

[0046] Specifically, while the support roller 222 provides basic support, the support component 22 drives the transmission frame 226 to move through the transmission push rod 225, and drives the chain plate 227 to rotate and adjust its position along the chain structure formed by the connecting ring 228.

[0047] During movement, the chain plate 227 engages with the through groove on the side plate 221. The connecting ring 228 is embedded inside the through groove and slides along the groove's trajectory, thus constraining the movement path of the chain plate 227. When the transmission push rod 225 is in different extension and retraction states, the transmission frame 226 drives the chain plate 227 to switch positions between the horizontal and arc-shaped sections of the through groove, thereby changing the overall spatial form of the chain plate 227.

[0048] When the chain plate 227 is in the horizontal section, the connecting rings 228 are distributed in a straight line, and the support rollers 222 provide relatively uniform support to the wood-plastic composite board. When the chain plate 227 moves to the arc section, the connecting rings 228 change in height under the guidance of the through groove, so that the chain plate 227 is in an arc distribution state, thereby changing the contact position and force distribution of the support rollers 222 on the wood-plastic composite board, and realizing the switching of support boundary conditions.

[0049] The support roller 222 is located below the chain plate 227 to provide basic support for the chain plate 227, so that the chain plate 227 can form a stable load-bearing foundation under the action of the support roller 222; the wood-plastic board is placed above the chain plate 227 and generates corresponding support contact relationship with the shape of the chain plate 227; the pressure plate 224 is located above the wood-plastic board and is used to apply auxiliary constraints and clamping action to the wood-plastic board in the vertical direction.

[0050] The pressing component 23, located at the center of the base plate 1, is used to press down on the wood-plastic composite board. The pressing component 23 includes a ranging module 231 fixedly installed at the center of the base plate 1. Supporting push rods 232 are fixedly installed on both sides of the base plate 1. A limit frame 233 is fixedly installed at the top of the supporting push rods 232. A guide rail 234 is fixedly installed on the inner side of the limit frame 233, and a limit block 235 is embedded inside the guide rail 234. A limit push rod 236 is connected to the inner side of the limit block 235. A clamping plate 237 is fixedly installed at the movable end of the limit push rod 236. An airbag 238 is fixedly installed on the inner side of the clamping plate 237. A pressure sensor is connected above the airbag 238. The device 239 has a pressure sensor 2310 connected to the top of the airbag 238. The ranging module 231 is oriented vertically upward. The limiting frame 233 is movably connected to the base plate 1 through the support push rod 232. The limiting block 235 is slidably connected to the guide rail 234. The fixed end of the limiting push rod 236 is fixedly connected to the limiting block 235. The clamping plate 237 is symmetrically installed on both sides of the airbag 238, and the vertical structure of the clamping plate 237 is fixedly connected to the airbag 238 to limit the width of the airbag 238. The bottom end of the airbag 238 is located below the bottom end of the clamping plate 237. The pressure sensor 239 passes through the pipe structure at the top of the airbag 238.

[0051] Specifically, the supporting push rod 232 drives the limiting frame 233 to move vertically downwards, thereby causing the airbag 238 to move downwards synchronously, achieving gradual loading of the wood-plastic composite board. Clamping plates 237 are provided on both sides of the airbag 238. These clamping plates 237, through the limiting push rod 236, cooperate with the limiting block 235 and guide rail 234 to form a limiting constraint, restricting the lateral expansion of the airbag 238 during its movement. This controls the effective width of the airbag 238 under inflation and pressure. Through the limiting effect of the clamping plates 237, the airbag 238 deforms only within a preset width range during vertical loading, thus limiting the contact area between the airbag 238 and the wood-plastic composite board. This ensures that the loading area remains stable and consistent, improving repeatability under different test conditions. Meanwhile, the airbag 238 maintains its floating adaptability during compression. With the lateral limiting effect of the clamping plate 237 and the vertical guiding effect of the limiting frame 233, flexible and uniform loading of the wood-plastic composite board is achieved. During this process, the ranging module 231 is used to detect the vertical displacement change of the wood-plastic composite board in real time, and the pressure sensor 239 is used to detect the stress state of the airbag 238, thereby achieving synchronous acquisition of load and deformation.

[0052] This invention also discloses a testing method for a compression testing device based on wood-plastic composite board production, comprising the following steps:

[0053] S1. Adjust the installation position of the support component 22 by adjusting the component 21 to change the support span of the wood-plastic board, and switch between single-sided support or double-sided support according to the test requirements, thereby constructing different basic stress boundary conditions.

[0054] S2. The wood-plastic composite board is supported by the support component 22, and the shape of the support boundary is adjusted; at the same time, the wood-plastic composite board is positioned and clamped.

[0055] S3. Adjust the contact area with the wood-plastic composite board by pressing down the detection component 23 to adapt to different working conditions.

[0056] S4. By moving the entire pressure detection component 23 downward, a flexible loading force is applied to the wood-plastic composite board, and the deformation and stress change of the wood-plastic composite board are detected simultaneously, thereby completing the strength test process.

[0057] Specifically, the motor 215 is model 42BYGH48, the pressing push rod 223 is model SL-A01-50, the transmission push rod 225 is model DMH25-50, the ranging module 231 is model TFmini-S, the support push rod 232 is model TA2-100, the limit push rod 236 is model E050-30, the pressure sensor 239 is model LH-S10D with a through hole in the center, and the air pressure sensor 2310 is model XP2-083-02. Furthermore, any content not described in detail in this specification is considered prior art known to those skilled in the art.

[0058] During operation, firstly, according to the size of the wood-plastic composite board to be tested and the preset testing conditions, the adjustment component 21 is driven and controlled. The motor 215 drives the lead screw 216 to rotate, causing the threaded sleeve 217 to move along the slide rail 212, thereby changing the distance between the two support components 22 to achieve adjustable support span.

[0059] During this process, a single-sided support mode or a double-sided support mode can be selected according to the test requirements: when a single-sided support is used, only one side support component 22 participates in bearing the load to simulate the eccentric load condition; when a double-sided support is used, the two sides support components 22 work together to simulate the uniformly distributed load condition, thereby realizing the construction of different foundation boundary conditions.

[0060] After the support span is set, the chain plate 227 structure is moved in the through groove of the side plate 221 by driving the transmission push rod 225, so that the chain plate 227 switches between the horizontal section and the arc section of the through groove, thereby changing the spatial shape of the chain plate 227.

[0061] When the chain plate 227 is in a horizontal state, each connecting ring 228 is evenly distributed along the horizontal through groove section, so that the support roller 222 forms a stable and uniform support for the wood-plastic composite board; when the chain plate 227 enters the arc section, the connecting ring 228 changes position along the arc trajectory, so that the chain plate 227 as a whole is in an arc-shaped constraint state, thereby changing the support boundary conditions of the wood-plastic composite board and realizing the simulation of different force distribution states.

[0062] According to the specifications and testing requirements of the wood-plastic composite board to be tested, the spacing between the plywood 237 is adjusted, and the inflation state of the airbag 238 is changed by controlling the inflation amount, so that the airbag 238 forms flexible contact areas of different widths under the lateral limiting effect of the plywood 237.

[0063] This adjustment method matches the effective contact area of ​​the airbag 238 with the stress area of ​​the wood-plastic composite board, thereby simulating loading under different pressure contact conditions. At the same time, it ensures that the airbag 238 still has flexible fitting ability during the compression process, so as to improve the uniformity of loading.

[0064] The wood-plastic composite board is placed above the chain plate 227, and the pressure plate 224 clamps and positions the wood-plastic composite board in the vertical direction, so that the wood-plastic composite board maintains a stable position during the test.

[0065] In this process, the pressure plate 224 and the support roller 222 form an upper and lower cooperation structure, which coordinates the constraint of the wood-plastic board in the vertical and horizontal directions, thereby limiting its lateral displacement and offset during the loading process, ensuring that the force is always within the preset support area, and improving the consistency of the test boundary conditions.

[0066] The support push rod 232 drives the limiting frame 233 to move vertically downwards, causing the airbag 238 to gradually contact the wood-plastic composite board and apply a loading force. During the loading process, the airbag 238 maintains a preset width under the lateral limiting action of the clamping plate 237 and undergoes flexible deformation under pressure, thereby transferring the load to the surface of the wood-plastic composite board in a uniform or restricted distribution form, realizing the stress simulation under different loading conditions. At the same time, the ranging module 231 detects the vertical displacement change of the wood-plastic composite board in real time to obtain its deflection response; the pressure sensor 239 is used to detect the stress state change of the airbag 238, thereby realizing the synchronous acquisition and correlation analysis of load and deformation, and completing the test of the compressive strength of the wood-plastic composite board.

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compressive strength testing device based on wood-plastic composite board production, characterized in that: Includes a base plate (1), and a testing mechanism (2) is provided above the base plate (1) for testing the compressive strength of the wood-plastic composite board. The testing mechanism (2) includes: Adjustment components (21) are located on both sides of the base plate (1) and are used to adjust the position of the support components (22); The support assembly (22) includes a side plate (221) fixed above the adjustment assembly (21). A support roller (222) is inserted and installed on one side of the side plate (221). A pressing rod (223) is fixed on the outer side of the side plate (221), and a pressure plate (224) is fixedly installed on the movable end of the top of the pressing rod (223). A transmission push rod (225) is fixedly installed between the side plates (221), and a transmission frame (226) is fixedly installed on the movable end of the transmission push rod (225). A chain plate (227) is connected to the top of the transmission frame (226), and connecting rings (228) are embedded at both ends of the chain plate (227). The pressing component (23) is located at the center of the base plate (1) and is used to press down the wood-plastic composite board.

2. The compression testing equipment based on wood-plastic composite board production according to claim 1, characterized in that: The adjustment assembly (21) includes support rods (211) fixedly installed on both sides of the base plate (1). A slide rail (212) is fixedly installed on the top of the support rod (211), and a slider (213) is embedded inside the slide rail (212). A support plate (214) is fixedly installed above the slider (213). A motor (215) is fixedly installed between the support rods (211). A lead screw (216) is connected to the end of the shaft of the motor (215). A threaded sleeve (217) is installed on the outside of the lead screw (216) by thread.

3. The compression testing equipment based on wood-plastic composite board production according to claim 2, characterized in that: The support rods (211) are installed in pairs at both ends of the base plate (1). The slider (213) and the slide rail (212) form a sliding connection. The support plate (214) forms a sliding connection with the slide rail (212) through the slider (213). The threaded sleeve (217) is fixedly installed at the center of the bottom protrusion structure of the support plate (214).

4. The compression testing equipment based on wood-plastic composite board production according to claim 2, characterized in that: The side plate (221) is symmetrically installed on both sides of the support plate (214), and the surface of the side plate (221) is provided with a through groove with one end horizontal and the other end arc-shaped, which is used to limit the shape of the chain plate (227). The two ends of the support roller (222) are rotatably connected to the side plate (221) through bearings.

5. The compression testing equipment based on wood-plastic composite board production according to claim 4, characterized in that: The downward push rod (223) is symmetrically installed on the outside of the side plate (221) on both sides of the support plate (214). The installation position of the pressure plate (224) is located at the connection between the horizontal structure and the arc structure of the through groove of the side plate (221). The bottom of the downward push rod (223) is fixedly connected to the support plate (214). The chain plate (227) is provided with multiple pieces that are connected to each other through the connecting ring (228), and the chain plate (227) and the connecting ring (228) form a rotating connection.

6. The compression testing equipment based on wood-plastic composite board production according to claim 5, characterized in that: The connecting ring (228) is fitted into the through groove of the side plate (221) and forms a sliding connection with the through groove. One end of the transmission frame (226) is fixedly connected to a single chain plate (227), and the top of the transmission frame (226) is flush with the top of the chain plate (227).

7. The compression testing equipment based on wood-plastic composite board production according to claim 1, characterized in that: The pressing assembly (23) includes a ranging module (231) fixedly installed at the center of the base plate (1). Support push rods (232) are fixedly installed on both sides of the base plate (1). A limit frame (233) is fixedly installed at the top of the support push rod (232). A guide rail (234) is fixedly installed on the inner side of the limit frame (233). A limit block (235) is embedded inside the guide rail (234). A limit push rod (236) is connected to the inner side of the limit block (235). A clamping plate (237) is fixedly installed at the movable end of the limit push rod (236). An airbag (238) is fixedly installed on the inner side of the clamping plate (237). A pressure sensor (239) is connected above the airbag (238). A pressure sensor (2310) is connected to the top of the airbag (238).

8. The compression testing equipment based on wood-plastic composite board production according to claim 7, characterized in that: The ranging module (231) is oriented vertically upward. The limiting frame (233) is movably connected to the base plate (1) through the support push rod (232). The limiting block (235) is slidably connected to the guide rail (234). The fixed end of the limiting push rod (236) is fixedly connected to the limiting block (235).

9. A compression testing device based on wood-plastic composite board production according to claim 7, characterized in that: The clamp (237) is symmetrically installed on both sides of the airbag (238), and the vertical structure of the clamp (237) is fixedly connected to the airbag (238) to limit the width of the airbag (238). The bottom end of the airbag (238) is located below the bottom end of the clamp (237), and the top pipe structure of the airbag (238) passes through the pressure sensor (239).

10. A method for testing the compressive strength of wood-plastic composite boards, using the compressive strength testing equipment for wood-plastic composite boards as described in claims 1-9, characterized in that: Includes the following steps: S1. Adjust the installation position of the support component (22) by adjusting the component (21) to change the support span of the wood-plastic board, and switch between single-sided support or double-sided support according to the test requirements, so as to construct different basic stress boundary conditions. S2. Support the wood-plastic composite board using the support component (22) and adjust the shape of the support boundary; simultaneously, position and clamp the wood-plastic composite board. S3. Adjust the area of ​​the contact surface with the wood-plastic composite board by pressing down the detection component (23) to adapt to different working conditions. S4. By moving the pressure detection component (23) downward as a whole, a flexible loading force is applied to the wood-plastic composite board, and the deformation and stress change of the wood-plastic composite board are detected simultaneously, thereby completing the strength test process.

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