Corrugated board compressive strength testing device

Abstract

The invention relates to the field of corrugated board detection, in particular to a corrugated board compressive strength testing device which comprises a testing host, the testing host comprises a pressing testing rod, and the testing host further comprises a material conveying device located on the testing host; the material conveying device comprises a clamping seat, a clamping plate is arranged on the clamping seat, and a pressing plate assembly is further arranged on the clamping seat; the material conveying device further comprises a driving mechanism and a pre-pressing mechanism. The material conveying device comprises a discharging station, a pre-pressing station and a testing station. When the clamping base is located at the discharging station, the driving mechanism drives the clamping plate to be opened. When the clamping seat is located at the pre-pressing station, the driving mechanism drives the clamping plate to clamp the corrugated board, and the pre-pressing mechanism drives the pressing plate assembly to downwards press the clamped corrugated board; when the clamping base is located at the testing station, the driving mechanism drives the clamping plate to be opened, and the testing rod is pressed downwards to abut against the pressing plate assembly so as to test the corrugated board. According to the invention, the pre-pressure is applied to the corrugated board before testing to replace the clamping force of a clamping plate, so that the measurement error caused by the clamping force is eliminated.

Description

Technical Field

[0001] The invention relates to the field of corrugated paperboard detection, in particular to a corrugated paperboard compressive strength testing device. Background Art

[0002] Corrugated cardboard is made into corrugated boxes through die-cutting, creasing, nailing or gluing. Corrugated boxes are the most widely used packaging products, and their usage has always been the first among various packaging products, including calcium plastic corrugated boxes. For more than half a century, corrugated boxes have gradually replaced wooden boxes and other transport packaging containers with their superior performance and good processing performance, becoming the main force of transport packaging. In addition to protecting goods and facilitating warehousing and transportation, they also play a role in beautifying and promoting goods. Corrugated boxes are green and environmentally friendly products. They are beneficial to environmental protection and loading and unloading and transportation. After the production of corrugated boxes, their edges and corners need to be tested for compressive strength to detect whether the sample is qualified.

[0003] The existing technology usually uses an edge pressure tester to test the compressive strength of the corners of corrugated boxes. The edge pressure tester is an efficient and easy-to-use instrument, which is mainly used for strength testing of corrugated board, boxboard, and corrugated core paper. The existing edge pressure tester mainly includes a hydraulic lifting system, a test platform, an upper top plate, a pressure sensor, etc. During the test, the corrugated board to be tested is placed on the test platform, and the test platform is driven by the hydraulic lifting system to move toward the upper top plate. At the same time, the upper top plate and the test platform squeeze the corrugated board at the same time until the corrugated board is deformed and damaged, and the pressure sensor measures the maximum pressure value.

[0004] During the detection process, corrugated boxes are generally placed manually, which can easily affect the detection effect and detection data due to the inaccurate placement of the corrugated boxes. Manual alignment and adjustment of the placement of the corrugated cardboard are required, which is inefficient and has low measurement accuracy.

[0005] Furthermore, since the existing test platform lacks an effective limiting mechanism, when the test platform drives the corrugated cardboard to move upward and the upper end of the corrugated cardboard does not contact the upper top plate, the corrugated cardboard may fall over and cannot be tested. Therefore, in the prior art, a clamp is usually placed to perform preliminary clamping, and there are two subsequent methods: removing the clamp or not removing the clamp. When removing the clamp, it needs to be manually removed from the gap of the pressing plate, which is cumbersome and dangerous. If it is not removed, it will affect subsequent measurement results. Summary of the invention

[0006] Based on this, the purpose of the present invention is to provide a corrugated cardboard compressive strength testing device, which applies pre-pressure to the corrugated cardboard before testing to replace the clamping force of the clamping plate, so as to eliminate the error in the measurement result caused by the clamping force.

[0007] The above purpose is achieved through the following technical solutions: A corrugated paperboard compressive strength testing device comprises a testing host, the testing host comprises a downward pressing testing rod, and also comprises a material conveying device located on the testing host; The material conveying device comprises a clamping seat for placing the corrugated paperboard, the clamping seat is provided with a clamping plate for clamping the corrugated paperboard, and the clamping seat is also provided with a pressing plate assembly for pressing the edge of the corrugated paperboard; The material conveying device also includes a driving mechanism for driving the clamping plate to move and a pre-pressing mechanism for driving the pressing plate assembly to press downward; The material conveying device includes a material discharge station, a pre-pressing station and a testing station; When the clamp seat is located at the material discharging station, the driving mechanism drives the clamp plate to open to place the corrugated paperboard; When the clamp seat is located at the pre-pressing station, the driving mechanism drives the clamping plate to clamp the corrugated paperboard, and the pre-pressing mechanism drives the pressing plate assembly to press down the clamped corrugated paperboard; When the clamp seat is located at the testing station, the driving mechanism drives the clamp plate to open, and the downward pressing test rod presses the pressing plate assembly to perform a compressive strength test on the edge of the corrugated paperboard.

[0008] Preferably, the material conveying device comprises a frame, the clamping seat comprises a pressure seat and a carrier seat which can move synchronously in the frame, the clamping plate is arranged on the pressure seat and / or the carrier seat, and the pressure plate assembly is arranged on the pressure seat.

[0009] Preferably, the pressing plate assembly comprises an upper pressing plate and a lower pressing plate which are arranged in the middle of the pressing seat and are stacked, and the upper pressing plate and the lower pressing plate are connected by an elastic member.

[0010] Preferably, both the press seat and the carrier seat are provided with sliding feet, and the frame is provided with inner sliding grooves adapted to the sliding feet of the press seat and outer sliding grooves adapted to the sliding feet of the carrier seat.

[0011] Preferably, the distance between the inner chute and the outer chute at the discharge station is greater than the distance between the inner chute and the outer chute at the test station.

[0012] Preferably, the driving mechanism includes a driving plate arranged on the pressure seat and / or the carrier seat and cooperating with the clamping plate, and a reset member for resetting the driving plate. A contact plate for abutting the driving plate is arranged in the frame. When the pressure seat and / or the carrier seat is moving, the driving plate moves under the action of the contact plate and the reset member to drive the clamping plate to move synchronously.

[0013] Preferably, a sliding shaft is provided on the clamping plate, a horizontal sliding groove cooperating with the sliding shaft is provided on the pressure seat and / or the carrier seat, and an inclined sliding groove cooperating with the sliding shaft is provided on the driving plate.

[0014] Preferably, the pre-pressing mechanism is configured as a butting protrusion disposed in the frame, and during the movement of the pressure seat, the pressure plate assembly contacts and presses against the butting protrusion to achieve a downward pressing action.

[0015] Preferably, the frame is annular, and a plurality of the clamping seats distributed at intervals are arranged in the annular frame.

[0016] Preferably, a loading mechanism is provided on the frame at the unloading station, the loading mechanism comprises a corrugated cardboard placement slot, and a power mechanism for conveying the corrugated cardboard into the clamping seat is provided at the bottom of the corrugated cardboard placement slot.

[0017] The beneficial effects of the present invention are: 1. Before the strength test, the present application uses a pre-pressing mechanism to drive the pressure plate assembly to pre-press the clamped corrugated cardboard. Under the action of the pre-pressure, the corrugated cardboard will not fall over. During the strength test, the clamping plate can be removed to eliminate the error in the measurement result caused by the clamping force of the clamping plate on the corrugated cardboard.

[0018] 2. The driving force of the clamping plate and the pre-pressure of the pressure plate assembly of the present application are provided by the abutment plate and the abutment protrusion in the frame of the material conveying device, without the need for manual force, thus eliminating the danger of manually removing the clamping block in the prior art.

[0019] 3. The pressure plate assembly uses an upper pressure plate and a lower pressure plate connected by an elastic member. The force on the upper pressure plate is transmitted to the lower pressure plate through the elastic member. At this time, the force decays into a weaker force after passing through the elastic member, which is closer to the requirements of the pre-pressure and the measurement pressure, avoiding excessive pre-pressure and measurement pressure, which may cause the corrugated cardboard to bend prematurely.

[0020] 4. The frame of the material conveying device of the present application is arranged in a ring shape, and a plurality of spaced-apart clamping seats are arranged in the ring frame. The staff only needs to place the sample in the corrugated cardboard placement slot to realize multiple, repeated and automatic measurements.

[0021] 5. The spacing between the clamping plates of the device of the present application is adjustable, which can adapt to the test of different numbers of corrugated cardboards and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 The structural diagram of the test host is deleted in the present invention; Figure 3It is a front sectional view of the material conveying device; Figure 4 A front cross-sectional view of a material conveying device showing abutment projections; Figure 5 A front cross-sectional view showing an inner chute for a material conveying device; Figure 6 It is a schematic diagram of the matching structure of the clamping seat, clamping plate, pressure plate assembly and driving plate; Figure 7 for Figure 6 A schematic cross-sectional view showing a cross section of a platen assembly; Figure 8 for Figure 6 A schematic cross-sectional view showing a cross section of a drive plate; Fig. 9 for Figure 6 A schematic cross-sectional view showing a cross section of a splint; Fig.10 for Figure 6 A schematic cross-sectional view showing the cross-section of the driving plate and the clamping plate; Fig.11 It is a structural schematic diagram of the pressure seat; Fig.12 It is a structural schematic diagram of the driving board; Fig.13 is a schematic diagram of the structure of the splint; in: 1. Clamping seat; 11. Pressing seat; 111. Horizontal slide; 112. Positioning tube; 12. Carrying seat; 121. Sliding foot; 2. Clamping plate; 21. Sliding shaft; 22. Connecting rod; 3. Pressing plate assembly; 31. Upper pressing plate; 32. Lower pressing plate; 33. Elastic member; 4. Driving plate; 41. Inclined slide; 42. Positioning rod; 5. Reset member; 100, test host; 101, push-down test rod; 200, material conveying device; 201, frame; 2011, inner slide; 2012, outer slide; 2013, abutment plate; 2014, top-butting protrusion; 202, guide plate; 300, feeding mechanism; 301, corrugated cardboard placement slot; 302, power mechanism. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0025] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] like Figure 1-13 As shown, a corrugated cardboard compressive strength testing device includes a testing host 100, the testing host 100 includes a downward pressure testing rod 101, and also includes a material conveying device 200 located on the testing host 100; the material conveying device 200 includes a clamping seat 1 for placing the corrugated cardboard, the clamping seat 1 is provided with a clamping plate 2 for clamping the corrugated cardboard, and the clamping seat 1 is also provided with a pressing plate assembly 3 for squeezing the edge of the corrugated cardboard; the material conveying device 200 also includes a driving mechanism for driving the clamping plate 2 to move and a pressing plate assembly 3 for driving the clamping plate 2 to move. A pre-pressing mechanism for pressing the movable pressure plate assembly 3 downward; the material conveying device 200 includes a discharge station, a pre-pressing station and a test station; when the clamp seat 1 is located at the discharge station, the driving mechanism drives the clamp plate 2 to open to place the corrugated cardboard; when the clamp seat 1 is located at the pre-pressing station, the driving mechanism drives the clamp plate 2 to clamp the corrugated cardboard, and the pre-pressing mechanism drives the pressure plate assembly 3 to press down the clamped corrugated cardboard; when the clamp seat 1 is located at the test station, the driving mechanism drives the clamp plate 2 to open, and presses down the test rod 101 to press the pressure plate assembly 3 to test the compressive strength of the edge of the corrugated cardboard.

[0027] In this embodiment, the clamping plate 2 and the pressing plate assembly 3 are located at different stations corresponding to different states to adapt to different working conditions; specifically, at the discharge station, the clamping plate 2 is opened to facilitate the placement of the corrugated cardboard, and the pressing plate assembly 3 does not move at this time; at the pre-pressing station, the clamping plate 2 clamps the corrugated cardboard, and after the clamping is completed, the pressing plate assembly 3 then presses down the clamped corrugated cardboard to provide pre-pressure in preparation for the subsequent removal of the clamping plate 2; at the testing station, the clamping plate 2 is opened to eliminate the error in the measurement result caused by the clamping force of the clamping plate 2 on the corrugated cardboard, and then the test rod 101 is pressed down to press the pressing plate assembly 3 to apply a test pressure to the corrugated cardboard.

[0028] In some preferred embodiments, the material conveying device 200 includes a frame 201, the clamping seat 1 includes a pressure seat 11 and a carrier seat 12 that can move synchronously in the frame 201, the clamping plate 2 is arranged on the pressure seat 11 and / or the carrier seat 12, and the pressure plate assembly 3 is arranged on the pressure seat 11.

[0029] In this embodiment, there is no specific limitation on the setting position of the splint 2, and it can be set only on the pressure seat 11, only on the carrier 12, or on both the pressure seat 11 and the carrier 12. However, it should be noted that when the splint 2 is set on both the pressure seat 11 and the carrier 12, the positions of the upper and lower splints 2 must always be kept aligned, that is, the movements of the splint 2 located on the pressure seat 11 and the splint 2 located on the carrier 12 must be consistent.

[0030] In this embodiment, for the convenience of production, the structures of the pressing seat 11 and the carrier seat 12 remain consistent, and the only difference is that a hollow groove is provided in the middle of the pressing seat 11, and the pressing plate assembly 3 is placed in the hollow groove.

[0031] In some preferred embodiments, Figure 6-13 As shown, the pressing plate assembly 3 includes an upper pressing plate 31 and a lower pressing plate 32 which are arranged in the middle of the pressing seat 11 and are stacked. The upper pressing plate 31 and the lower pressing plate 32 are connected by an elastic member 33 .

[0032] In this embodiment, the elastic member 33 adopts a disc spring, and the upper pressure plate 31 and the lower pressure plate 32 are connected by the disc spring. The force on the upper pressure plate 31 is transmitted to the lower pressure plate 32 through the disc spring. At this time, the force decays into a weaker force after passing through the disc spring, which is closer to the pre-pressure requirement, thereby avoiding excessive pre-pressure, which causes the corrugated cardboard to bend prematurely.

[0033] In some preferred embodiments, both the press seat 11 and the carrier seat 12 are provided with sliding feet 121, and the frame 201 is provided with an inner slide groove 2011 adapted to the sliding feet 121 of the press seat 11 and an outer slide groove 2012 adapted to the sliding feet 121 of the carrier seat 12.

[0034] In this embodiment, the pressing seat 11 and the carrying seat 12 both slide in their respective sliding grooves and slide in the frame 201 in a sliding manner. The mechanical structure is simple and the movement is more stable and reliable.

[0035] In some preferred embodiments, the distance between the inner chute 2011 and the outer chute 2012 at the discharge station is greater than the distance between the inner chute 2011 and the outer chute 2012 at the test station.

[0036] In this embodiment, the distance between the inner slide groove 2011 and the outer slide groove 2012 of the discharge station is larger, and the distance between the inner slide groove 2011 and the outer slide groove 2012 of the test station is smaller, that is, at the discharge station, the distance between the pressure seat 11 and the carrier seat 12 is farther, which is more convenient for the placement of corrugated cardboard. At the test station, the distance between the pressure seat 11 and the carrier seat 12 is closer, which shortens the pre-pressing stroke of the pressure plate assembly 3 and the pressing stroke of the pressing test rod 101, thereby improving the testing efficiency.

[0037] In some preferred embodiments, the driving mechanism includes a driving plate 4 which is arranged on the pressure seat 11 and / or the carrier seat 12 and cooperates with the clamping plate 2, and a reset member 5 for resetting the driving plate 4. A contact plate 2013 for resisting the driving plate 4 is arranged in the frame 201. When the pressure seat 11 and / or the carrier seat 12 is moving, the driving plate 4 moves under the action of the contact plate 2013 and the reset member 5 to drive the clamping plate 2 to move synchronously.

[0038] In this embodiment, the driving plate 4, the reset member 5 and the abutment plate 2013 together constitute a driving mechanism; the clamping plate 2 is provided on the pressure seat 11 and the carrier 12, so the driving plate 4 is also provided on the pressure seat 11 and the carrier 12, and to match it, two sets of abutment plates 2013 are also provided in the frame 201, which are used to cooperate with the driving plate 4 on the pressure seat 11 and the driving plate 4 on the carrier 12 respectively; the shape of the abutment plate 2013 is set according to the needs of different working conditions; for this embodiment, at the discharge station, the abutment plate 2013 contacts and squeezes the driving plate 4, driving the clamping plate 2 to open; in the pre-pressing position, the abutment plate 2013 is not in contact with the driving plate 4, and under the action of the reset member 5, the driving plate 4 drives the clamping plate 2 to approach to clamp the corrugated cardboard; in the testing position, the abutment plate 2013 contacts the extrusion driving plate 4 again, driving the clamping plate 2 to open; it should be emphasized that, at any position, the distance between the inner slide groove 2011 and the corresponding abutment plate 2013 is always equal to the distance between the outer slide groove 2012 and the corresponding abutment plate 2013, so as to ensure that the driving plate 4 and the clamping plate 2 on the pressing seat 11 and the carrier seat 12 always move in a consistent manner.

[0039] In some preferred embodiments, a sliding shaft 21 is provided on the clamping plate 2, a horizontal sliding groove 111 cooperating with the sliding shaft 21 is provided on the pressure seat 11 and the carrier seat 12, and an inclined sliding groove 41 cooperating with the sliding shaft 21 is provided on the driving plate 4.

[0040] In this embodiment, since the structures of the clamping plate 2 and the driving plate 4 arranged on the pressure seat 11 and the carrier seat 12 are exactly the same, the linkage structure of the driving plate 4 and the clamping plate 2 is introduced in conjunction with the pressure seat 11. At the same time, in order to ensure the stability of the movement of the clamping plate 2, a driving plate 4 is respectively arranged at both ends of the clamping plate 2, so only the single-side structure is introduced here.

[0041] like Figure 9-13 As shown, a slot for inserting the driving plate 4 is provided on the pressure seat 11, and the horizontal slide groove 111 is specifically arranged on the inner wall of the slot; since the splint 2 is composed of two single plates, two groups of horizontal slide grooves 111 are arranged on the inner wall of the slot; each single plate of the splint 2 is connected to the sliding shaft 21 through a connecting rod 22, and the two ends of the sliding shaft 21 are correspondingly located in a group of horizontal slide grooves 111; the interior of the driving plate 4 is a hollow structure, and two groups of inclined slide grooves 41 are also correspondingly arranged on the driving plate 4, and the two groups of inclined slide grooves 41 are specifically in a "V" shape. At the same time, since the interior of the driving plate 4 is a hollow structure, it is convenient for the connecting rod 22 to penetrate into the interior of the driving plate 4, and the sliding shaft 21 can pass through the inclined slide groove 41 and then penetrate into the horizontal slide groove 111, so as to realize the linkage of the action of the driving plate 4 and the splint 2; in addition, a reset member 5 is respectively arranged at both ends of the driving plate 4, and the reset member 5 is specifically A spring is used, specifically, a positioning rod 42 is provided at each end of the driving plate 4, and a limiting tube 112 is provided in the slot. When the driving plate 4 is inserted into the slot, the positioning rod 42 is just inserted into the limiting tube 112, and the spring is sleeved on the limiting tube 112. The limiting tube 112 plays a limiting guiding role for the driving plate 4, and also has a limiting effect on the spring; during specific action, the driving plate 4 has a tendency to move in the direction of the elastic force under the action of the spring. When the abutting plate 2013 is not in contact with the driving plate 4, the driving plate 4 moves along the direction of the elastic force to drive the two single plates of the splint 2 to move closer to the center to complete the clamping action. When the driving plate 4 is in contact with the abutting plate 2013, the abutting plate 2013 squeezes the driving plate 4 to move in the direction of the compression spring. When the driving plate 4 moves in the direction of the compression spring, it drives the two single plates of the splint 2 to separate to both sides to complete the opening work.

[0042] In some preferred embodiments, the pre-pressing mechanism is configured as a butting protrusion 2014 disposed in the frame 201 , and when the pressure seat 11 moves, the pressure plate assembly 3 contacts and presses the butting protrusion 2014 to achieve a downward pressing action.

[0043] In this embodiment, since the top protrusion 2014 contacts the extrusion plate assembly 3 in order to provide a pre-pressure to the corrugated cardboard, the top protrusion 2014 is arranged at the pre-pressure station; it should be noted that the stroke of the top protrusion 2014 driving the plate assembly 3 to move is relatively small, so the force applied is just enough to prevent the corrugated cardboard from tipping over.

[0044] In some preferred embodiments, the frame 201 is annular, and a plurality of spaced-apart clamping seats 1 are disposed in the annular frame 201 .

[0045] In this embodiment, the frame 201 is set to be annular, and adaptively, the inner slide groove 2011, the outer slide groove 2012, the abutment plate 2013 and the top protrusion 2014 are all annular; the sliding feet 121 on the pressure seat 11 of multiple clamping seats 1 are connected in series through the same chain or belt, and similarly, the sliding feet 121 on the carrier seat 12 of multiple clamping seats 1 are also connected in series through the same chain or belt, and power is applied to the chain or belt to achieve synchronous movement of the pressure seat 11 and the carrier seat 12; in addition, the unloading station, pre-pressing station and testing station are distributed counterclockwise along the annular frame 201, and the testing station is located at the lowest position of the annular frame 201 to ensure that the corrugated cardboard is placed vertically during testing.

[0046] In some preferred embodiments, a loading mechanism 300 is provided on the frame 201 at the unloading station. The loading mechanism 300 includes a corrugated cardboard placement slot 301 . A power mechanism 302 for conveying the corrugated cardboard into the clamping seat 1 is provided at the bottom of the corrugated cardboard placement slot 301 .

[0047] In this embodiment, the power mechanism 302 can specifically adopt a hydraulic push rod, and the push rod of the hydraulic push rod is specifically set at the bottom of the corrugated cardboard placement slot 301 to preferentially convey the corrugated cardboard at the bottom of the corrugated cardboard placement slot 301 to the clamping seat 1; in addition, two relatively arranged guide plates 202 are arranged in the material conveying device 200 corresponding to the bottom position of the corrugated cardboard placement slot 301, and the corrugated cardboard will enter along the middle position of the two guide plates 202, so that the corrugated cardboard will be conveyed to the middle position of the front-to-back direction in the clamping seat 1, ensuring the accuracy of subsequent measurements. Specifically, the corrugated cardboard will first be conveyed to the clamping seat 1 by the power mechanism 302, and at this time the pressing seat 11 and the carrier seat 12 They are arranged opposite to each other on the left and right, and the bottom surface of the corrugated cardboard placement groove 301 is level with the upper surface of the single board below the clamping plate 2. Therefore, under the thrust of the hydraulic push rod, the corrugated cardboard can smoothly enter the clamping seat 1 along the upper surface of the single board below the clamping plate 2. Since the pressure seat 11 and the carrier seat 12 are far apart at this time, the corrugated cardboard can be easily placed in; then when the corrugated cardboard moves to the position of the guide plate 202 with the clamping seat 1, the two oppositely arranged guide plates 202 will correct the position of the corrugated cardboard, so that the corrugated cardboard will be pressed against the middle position in the front-to-back direction of the clamping seat 1 (the corrugated cardboard can only pass through the middle space between the two guide plates 202, which corresponds to the middle position of the clamping seat 1).

[0048] Working process of the present invention: Corrugated cardboard is placed in the corrugated cardboard placement slot 301, and the conveying device 200 has a discharge station. In the current state, the clamp seat 1 is located in the discharge station, and the power mechanism 302 conveys the corrugated cardboard to the clamp seat 1, and uses the guide plate 202 to adjust the position of the corrugated cardboard to the middle position in the front-to-back direction of the clamp seat 1. At this time, the abutment plate 2013 and the drive plate 4 are in a contact and extrusion state, and the clamp plate 2 is in an open state; when the clamp seat 1 moves to the pre-pressing station, the abutment plate 2013 and the drive plate 4 are in a non-contact state , the clamping plate 2 is in a clamping state for the corrugated cardboard, and then the top protrusion 2014 contacts the pressing plate assembly 3, and the pressing plate assembly 3 squeezes the corrugated cardboard to apply a pre-pressure that just prevents the corrugated cardboard from tipping over; when the clamping seat 1 moves to the testing station, the abutting plate 2013 and the driving plate 4 are in a contact and squeezing state again, the clamping plate 2 is in an open state, and the corrugated cardboard is in a vertical state under the action of the pre-pressure. At this time, the pressing test rod 101 presses the pressing plate assembly 3 to apply a test pressure to the corrugated cardboard for a compressive strength test.

[0049] When the strength of multi-layer corrugated cardboard needs to be tested, it is only necessary to convey the corresponding amount of corrugated cardboard at the beginning.

[0050] It should be noted that the frame of the material conveying device 200 is annular, and its internal structure is also symmetrically arranged, that is, after the corrugated cardboard completes the compressive strength test, the clamping seat 1 continues to move forward and performs the aforementioned symmetrical action, and when the clamping seat 1 reaches a position symmetrical to the discharge station, it can be taken out.

[0051] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A corrugated cardboard compressive strength testing device, comprising a testing host, the testing host comprising a downward pressing testing rod, characterized in that: Also included is a material conveying device located on the test host; The material conveying device comprises a clamping seat for placing the corrugated paperboard, the clamping seat is provided with a clamping plate for clamping the corrugated paperboard, and the clamping seat is also provided with a pressing plate assembly for pressing the edge of the corrugated paperboard; The material conveying device also includes a driving mechanism for driving the clamping plate to move and a pre-pressing mechanism for driving the pressing plate assembly to press downward; The material conveying device includes a material discharge station, a pre-pressing station and a testing station; When the clamp seat is located at the material discharging station, the driving mechanism drives the clamp plate to open to place the corrugated paperboard; When the clamp seat is located at the pre-pressing station, the driving mechanism drives the clamping plate to clamp the corrugated paperboard, and the pre-pressing mechanism drives the pressing plate assembly to press down the clamped corrugated paperboard; When the clamp seat is located at the testing station, the driving mechanism drives the clamp plate to open, and the downward pressing test rod presses the pressing plate assembly to perform a compressive strength test on the edge of the corrugated paperboard.

2. The corrugated board compressive strength testing device according to claim 1, characterized in that: The material conveying device comprises a frame, the clamping seat comprises a pressure seat and a carrier seat which can move synchronously in the frame, the clamping plate is arranged on the pressure seat and / or the carrier seat, and the pressure plate assembly is arranged on the pressure seat.

3. The corrugated board compressive strength testing device according to claim 2, characterized in that: The pressing plate assembly comprises an upper pressing plate and a lower pressing plate which are arranged in the middle of the pressing seat and are stacked, and the upper pressing plate and the lower pressing plate are connected by an elastic member.

4. The corrugated board compressive strength testing device according to claim 2, characterized in that: The press seat and the carrier seat are both provided with sliding feet, and the frame is provided with an inner sliding groove adapted to the sliding feet of the press seat and an outer sliding groove adapted to the sliding feet of the carrier seat.

5. The corrugated board compressive strength testing device according to claim 4, characterized in that: The distance between the inner chute and the outer chute at the discharge station is greater than the distance between the inner chute and the outer chute at the test station.

6. The corrugated board compressive strength testing device according to claim 2, characterized in that: The driving mechanism includes a driving plate arranged on the pressure seat and / or the carrier seat and cooperating with the clamping plate, and a reset member for resetting the driving plate. A contact plate for abutting the driving plate is arranged in the frame. When the pressure seat and / or the carrier seat is moving, the driving plate moves under the action of the contact plate and the reset member to drive the clamping plate to move synchronously.

7. The corrugated board compressive strength testing device according to claim 6, characterized in that: The clamping plate is provided with a sliding shaft, the pressure seat and / or the carrier seat are provided with a horizontal sliding groove matched with the sliding shaft, and the driving plate is provided with an inclined sliding groove matched with the sliding shaft.

8. The corrugated board compressive strength testing device according to claim 2, characterized in that: The pre-pressing mechanism is configured as a butting protrusion arranged in the frame. During the movement of the pressure seat, the pressure plate assembly contacts and presses the butting protrusion to achieve a downward pressing action.

9. The corrugated board compressive strength testing device according to any one of claims 2 to 8, characterized in that: The frame is annular, and a plurality of the clamping seats distributed at intervals are arranged in the annular frame.

10. The corrugated board compressive strength testing device according to claim 9, characterized in that: A loading mechanism is arranged on the frame at the unloading station. The loading mechanism comprises a corrugated cardboard placement slot. A power mechanism for conveying the corrugated cardboard into the clamping seat is arranged at the bottom of the corrugated cardboard placement slot.

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