Cold press forming die for multi-layer plate

Abstract

The utility model discloses a cold press forming die for a multi-layer plate, which is characterized by comprising a lower die, an upper die and a plurality of pressure maintaining pull rods, and first open slots are respectively arranged on two sides of the lower die at intervals; a cold pressing space used for cold pressing forming of the multi-layer plate is formed between the upper die and the lower die, and second open grooves are formed in the two sides of the upper die at intervals. The lower ends of the pressure maintaining pull rods are matched with the corresponding first open slots, can be arranged in the first open slots in a penetrating manner and are fixedly connected with the lower die, or are taken out from the first open slots and are separated from the lower die; the upper ends of the pressure maintaining pull rods are matched with the corresponding second open grooves, and the pressure maintaining pull rods can be arranged in the second open grooves in a penetrating mode and fixedly connected with the upper die or taken out of the second open grooves and separated from the upper die. After the multi-layer board is subjected to cold pressing through the cold press, long-time pressure maintaining can be carried out on the multi-layer board, the multi-layer board is fully shaped, meanwhile, the cold press does not need to additionally set pressure maintaining time, and the working efficiency of the cold press is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of multilayer board forming devices, in particular to a cold pressing forming die for multilayer boards. Background Art

[0002] In the manufacturing process of multi-layer boards, it is necessary to apply glue to multiple thin wood chips and stack them together as required to form a preliminary multi-layer board, and then put the preliminary multi-layer board into a cold press for cold pressing, leveling and forming. Referring to Chinese patent document CN218195791U, in the prior art, cold pressing is often performed directly using a cold press. After cold pressing, after a certain period of pressure maintenance, the pressing plate of the cold press is opened and the multi-layer board is taken out. This cold pressing method has three major problems: first, the pressing plate and base of the cold press are in direct contact with the multi-layer board and are easily damaged; second, after the multi-layer board is cold-pressed, it is difficult for the cold press to maintain pressure for a long time, so that the pressure maintenance time of the multi-layer board after cold pressing is not long enough and the quality is not good enough; third, because the cold press needs to set a time to maintain pressure on the multi-layer board, the cold pressing molding time is increased, and the cold pressing efficiency is low.

[0003] With the advancement of technology, technical personnel in this field have designed a cold pressing mold, which includes an upper mold and a lower mold. When cold pressing a multilayer board, the multilayer board is placed between the upper mold and the lower mold, and then the upper mold is pressed down by the pressing plate of the cold press to achieve cold pressing of the multilayer board and avoid direct contact between the pressing plate and the base of the cold press. However, this cold pressing method is still difficult to maintain pressure for a long time, and the pressure holding time of the multilayer board after cold pressing is not long enough, and the quality is not good enough; and the cold press machine needs to set a time to maintain pressure on the multilayer board, thereby increasing the cold pressing molding time and the cold pressing efficiency is low. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a cold pressing forming mold for a multilayer board based on the above-mentioned deficiencies of the prior art. After the multilayer board is cold pressed by a cold press machine, the cold pressing forming mold can hold the multilayer board under pressure for a long time so that the multilayer board is fully shaped. At the same time, the cold press machine does not need to set a separate holding time, thereby improving the working efficiency of the cold press machine.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a cold pressing forming mold for a multilayer board, characterized in that: it includes a lower mold, an upper mold and several pressure-keeping rods, and 4-8 first opening grooves are respectively spaced apart on both sides of the lower mold, and the first opening grooves are connected up and down; there is a cold pressing space for cold pressing forming the multilayer board between the upper mold and the lower mold, and 4-8 second opening grooves are respectively spaced apart on both sides of the upper mold, and the second opening grooves are connected up and down; the number of the pressure-keeping rods, the first opening grooves and the second opening grooves match, the lower end of the pressure-keeping rod cooperates with the corresponding first opening groove, can be passed through the first opening groove and connected and fixed to the lower mold, or taken out from the first opening groove and separated from the lower mold; the upper end of the pressure-keeping rod cooperates with the corresponding second opening groove, can be passed through the second opening groove and connected and fixed to the upper mold, or taken out from the second opening groove and separated from the upper mold.

[0006] Preferably, the pressure-maintaining rod comprises a metal rod, a first gasket, a second gasket, a first screw and a second screw; the first gasket is movably sleeved outside the lower end of the metal rod, the diameter of the first gasket is greater than the width of the first opening groove, the lower end of the metal rod is provided with a first external thread, the first screw is provided at the lower side of the first gasket, and the first screw is screwed outside the first external thread; the second gasket is movably sleeved outside the upper end of the metal rod, the diameter of the second gasket is greater than the width of the second opening groove, the upper end of the metal rod is provided with a second external thread, the second screw is provided at the upper side of the second gasket, and the second screw is screwed outside the second external thread. Furthermore, the number of the first screw and the second screw are two respectively.

[0007] Preferably, six first opening grooves or second opening grooves are equally spaced apart on both sides of the lower die and the upper die, and the number of the pressure-maintaining tie rods is twelve.

[0008] Preferably, the upper mold and the lower mold are symmetrical in the upper and lower parts, and the upper mold and the lower mold respectively include a bottom steel plate, a longitudinal support steel plate, a transverse support steel plate and a top steel plate, and the overall shape of the bottom steel plate and the top steel plate are both rectangular, the number of the longitudinal support steel plates is 2-4, and the 2-4 longitudinal support steel plates are welded on the bottom steel plate at intervals, and the longitudinal support steel plate and the bottom steel plate are perpendicular to each other and parallel to the long side of the bottom steel plate; the number of the transverse support steel plates is more than 2, and the transverse support steel plates are welded on the bottom steel plate at intervals and welded Between adjacent longitudinal supporting steel plates, the transverse supporting steel plate is perpendicular to the bottom steel plate and parallel to the wide side of the bottom steel plate, and the height of the transverse supporting steel plate is consistent with that of the longitudinal supporting steel plate; the top steel plate is welded to the longitudinal supporting steel plate and the transverse supporting steel plate, the top steel plate is parallel to the bottom steel plate, and the long side of the top steel plate is parallel to the long side of the bottom steel plate; the first opening groove or the second opening groove is opened at the long sides of both sides of the bottom steel plate, and the outer end of the first opening groove or the second opening groove is located outside the positive projection area of ​​the top steel plate falling on the bottom steel plate.

[0009] Preferably, the 2-4 longitudinal support steel plates are respectively provided with two fork rod sockets for inserting the fork rod of the forklift. Furthermore, the transverse support steel plates are respectively arranged at both ends of the fork rod sockets, and the transverse support steel plates are flush with the ends of the fork rod sockets.

[0010] Preferably, the number of the longitudinal support steel plates is 3, which are welded on the bottom steel plate at equal intervals, and the number of the transverse support steel plates is 12.

[0011] Preferably, the first opening groove or the second opening groove is in the shape of a rectangle, and a reinforcing steel plate is vertically welded on the bottom steel plate on both sides of the first opening groove or the second opening groove, and one end of the reinforcing steel plate is welded to one side of the longitudinal supporting steel plate.

[0012] Preferably, the length of the bottom steel plate is 150mm-250mm, and the width is 80mm-150mm; the length of the top steel plate is 130mm-230mm, and the width is 60mm-130mm; the thickness of the bottom steel plate is 20mm-40mm, and the thickness of the longitudinal supporting steel plate, transverse supporting steel plate, top steel plate and reinforcing steel plate are 10mm-30mm respectively.

[0013] The beneficial effects of the utility model are as follows: the utility model has 4-8 first opening grooves that are vertically connected and spaced apart on both sides of the lower mold, and 4-8 second opening grooves that are vertically connected and spaced apart on both sides of the upper mold, and a pressure-keeping tie rod is provided. The lower end of the pressure-keeping tie rod cooperates with the corresponding first opening groove, can be inserted into the first opening groove and connected and fixed with the lower mold, or taken out from the first opening groove and separated from the lower mold, and the upper end of the pressure-keeping tie rod cooperates with the corresponding second opening groove, can be inserted into the second opening groove and connected and fixed with the upper mold, or taken out from the second opening groove and separated from the upper mold; therefore, before the utility model cold-presses the multi-layer board, all the pressure-keeping tie rods can be removed first, and then the multi-layer board after glue coating is placed in the cold-pressing space and cold-pressed downwards through the pressing plate of the cold press machine, and the cold press Afterwards, the upper and lower ends of the pressure-holding tie rod are respectively inserted into the corresponding second opening groove and the first opening groove, and the upper mold and the lower mold are fixed. Then, the pressing plate of the cold press machine is lifted upward, and the upper mold and the lower mold of the cold pressing forming mold of the utility model continue to hold the pressure on the multi-layer board under the action of the pressure-holding tie rod. The staff only needs to take the cold pressing forming mold of the utility model and the multi-layer board out of the cold press machine together, and when the holding time (for example, 12 hours) is up and the multi-layer board is qualified, the upper and lower ends of the pressure-holding tie rod are taken out from the corresponding second opening groove and the first opening groove. It can be seen that the cold pressing forming mold of the utility model can hold the pressure on the multi-layer board for a long time after the multi-layer board is cold-pressed by the cold press machine, so that the multi-layer board is fully shaped. At the same time, the cold press machine does not need to set a separate holding time, thereby improving the working efficiency of the cold press machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the cold pressing mold.

[0015] Figure 2 Schematic diagram of the dispersed structure of the cold pressing mold.

[0016] Figure 3 This is a diagram showing the state of the cold press forming mold maintaining pressure on the multilayer board.

[0017] Figure 4 Schematic diagram of the dispersed structure of the upper die or the lower die.

[0018] In the figure: 1. Lower die; 12. First opening groove; 2. Upper die; 22. Second opening groove; 3. Pressure-maintaining rod; 31. Metal rod; 32. First gasket; 33. Second gasket; 34. First screw; 35. Second screw; 4. Bottom steel plate; 5. Longitudinal support steel plate; 51. Lifting hole; 6. Horizontal support steel plate; 7. Top steel plate; 8. Fork rod socket; 9. Reinforcement steel plate. DETAILED DESCRIPTION

[0019] The structural principle and working principle of the utility model are further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-Figure 4 As shown, the utility model is a cold press forming mold for a multilayer board, comprising a lower die 1, an upper die 2 and several pressure-keeping tie rods 3, the two sides of the lower die 1 are respectively spaced apart with 4-8 first opening grooves 12, and the first opening grooves 12 are connected vertically; a cold pressing space 200 for cold press forming the multilayer board 100 is provided between the upper die 2 and the lower die 1, and the two sides of the upper die 2 are respectively spaced apart with 4-8 second opening grooves 22, and the second opening grooves 22 are connected vertically; the number of the pressure-keeping tie rods 3, the first opening grooves 12 and the second opening grooves 22 match, the lower end of the pressure-keeping tie rod 3 cooperates with the corresponding first opening groove 12, can be inserted into the first opening groove 12 and connected and fixed to the lower die 1, or taken out from the first opening groove 12 and separated from the lower die 1; the upper end of the pressure-keeping tie rod 3 cooperates with the corresponding second opening groove 22, can be inserted into the second opening groove 22 and connected and fixed to the upper die 2, or taken out from the second opening groove 22 and separated from the upper die 2.

[0021] The operation method of the cold pressing forming mold of the utility model is as follows;

[0022] 1. Preparation: prepare multiple sets of cold pressing molds, and separate the lower mold 1, upper mold 2 and pressure holding rod 3 of each set of cold pressing molds from each other;

[0023] 2. Place the glued multilayer board on the lower mold 1. It should be noted that 10-50 groups of multilayer boards 100 can be placed on the lower mold 1. Each group of multilayer boards 100 usually contains 3-15 thin wood sheets. Two adjacent groups of multilayer boards 100 should be separated by a partition 101 to prevent the adjacent multilayer boards 100 from being pressed together and difficult to separate.

[0024] 3. Use a forklift to transport the lower mold 1 and the multilayer boards stacked on the lower mold 1 to the base of the cold press;

[0025] 4. Use a forklift to place the upper mold 2 on the top layer of the multilayer board. The upper mold 2 and the lower mold 1 are opposite to each other, clamping the multilayer board so that the multilayer board is located within the cold pressing space 200;

[0026] 5. Start the cold press machine, the pressing plate of the cold press machine presses the upper mold 2 downward, and the upper mold 2 presses the multilayer board 100 downward. After pressing down to the set position, the pressing plate of the cold press machine stops pressing down;

[0027] 6. Insert the upper end of the pressure-maintaining rod 3 into the corresponding second opening groove 22 and fix the upper mold 2, and insert the lower end of the pressure-maintaining rod 3 into the corresponding first opening groove 12 and fix the lower mold 1;

[0028] 7. The pressing plate of the cold press machine is lifted upward, and the upper die 2 and the lower die 1 of the cold press forming mold continue to maintain pressure on the multilayer board 100 under the action of the pressure holding tie rod 3;

[0029] 8. Use a forklift to take the cold press forming mold and the multilayer board 100 of the utility model out of the cold press machine, and the cold press machine can cold press another set of cold press forming molds and multilayer boards 100;

[0030] 9. After holding the pressure for 6-12 hours, the multilayer board is cold-pressed. The staff removes the upper and lower ends of the pressure-holding tie rod 3 of the cold-pressing mold from the corresponding second opening groove 22 and the first opening groove 12, and then removes the upper mold 2, and finally removes the cold-pressed multilayer board 100 from the lower mold 1.

[0031] The utility model adopts multiple sets of cold pressing forming dies to cold press the multilayer board 100, so that the cold press machine can perform cold pressing work efficiently. It can be seen that after the cold pressing of the multilayer board by the cold press machine, the cold pressing forming dies of the utility model can hold the multilayer board 100 for a long time, so that the multilayer board 100 is fully formed, and at the same time, the cold press machine does not need to set a separate holding time, thereby improving the working efficiency of the cold press machine.

[0032] like Figure 1-Figure 4 As shown, the pressure-maintaining rod 3 includes a metal rod 31, a first gasket 32, a second gasket 33, a first screw 34 and a second screw 35; the first gasket 32 ​​is movably mounted outside the lower end of the metal rod 31, the diameter of the first gasket 32 ​​is greater than the width of the first opening groove 12, the lower end of the metal rod 31 is provided with a first external thread 311, the first screw 34 is arranged at the lower side of the first gasket 32, and the first screw 34 is screwed outside the first external thread 311; the second gasket 33 is movably mounted outside the upper end of the metal rod 31, the diameter of the second gasket 33 is greater than the width of the second opening groove 22, the upper end of the metal rod 31 is provided with a second external thread 312, the second screw 34 is arranged at the upper side of the second gasket 33, and the second screw 35 is screwed outside the second external thread 312. The number of the first screw 34 and the second screw 35 are two respectively. By tightening or loosening the first screw 34 and the second screw 35 , the pressure-maintaining rod 3 can be fixedly connected to or separated from the lower mold 1 and the upper mold 2 . By providing two first screws 34 and the second screw 35 , the connection tightness can be improved.

[0033] like Figure 1-Figure 4 As shown, as a preferred embodiment of the present invention, six first opening grooves 12 or second opening grooves 22 are equally spaced apart on both sides of the lower mold 1 and the upper mold 2, and the number of the pressure-maintaining tie rods 3 is twelve.

[0034] like Figure 1-Figure 4As shown, as a preferred embodiment of the present invention, the upper mold 2 is symmetrical with the lower mold 1, and the upper mold 2 and the lower mold 1 respectively include a bottom steel plate 4, a longitudinal support steel plate 5, a transverse support steel plate 6 and a top steel plate 7. The overall shape of the bottom steel plate 4 and the top steel plate 7 are both rectangular. The number of the longitudinal support steel plates 5 is 2-4, and the 2-4 longitudinal support steel plates 5 are welded to the bottom steel plate 4 at intervals. The longitudinal support steel plate 5 is perpendicular to the bottom steel plate 4 and parallel to the long side of the bottom steel plate 4; the number of the transverse support steel plates 6 is more than 2, and the transverse support steel plates 6 are welded to the bottom steel plate 4 at intervals. The top steel plate 7 is welded on the longitudinal support steel plate 5 and the transverse support steel plate 6, and the top steel plate 7 is parallel to the bottom steel plate 4, and the long side of the top steel plate 7 is parallel to the long side of the bottom steel plate 4; the first opening groove 12 or the second opening groove 22 is opened at the long sides of the bottom steel plate 4, and the outer end of the first opening groove 12 or the second opening groove 22 is located outside the positive projection area of ​​the top steel plate 7 falling on the bottom steel plate 4. Since the upper mold 2 and the lower mold 1 of the utility model are symmetrical with each other, the upper mold 2 and the lower mold 1 can have strong versatility, and are easy to manage, store and use. Since the upper mold 2 and the lower mold 1 of the utility model are provided with a bottom steel plate 4 and a top steel plate 7, and the longitudinal supporting steel plate 5 and the transverse supporting steel plate 6 are welded between the bottom steel plate 4 and the top steel plate 7, it is possible to ensure that the upper mold 2 and the lower mold 1 have extremely high strength, can well withstand the pressure of the cold press, and are not easily deformed; at the same time, it is convenient for the forklift rod of the forklift to be forked into the gap between the bottom steel plate 4 and the top steel plate 7 to transport the upper mold 2 and the lower mold 1; in addition, since the first opening groove 12 or the second opening groove 22 is opened at the long sides of both sides of the bottom steel plate 4, and the outer end of the first opening groove 12 or the second opening groove 22 is located outside the positive projection area of ​​the top steel plate 7 falling on the bottom steel plate 4, therefore, the utility model can use the bottom steel plate to connect the pressure-holding tie rod 3, and use the top steel plate to cold-press the multi-layer board, and the bottom steel plate will not occupy the cold-pressing space position of the top steel plate when connecting the pressure-holding tie rod 3.

[0035] like Figure 1-Figure 4 As shown, as a preferred embodiment of the present invention, the 2-4 longitudinal support steel plates 5 are respectively provided with two corresponding fork rod sockets 8 for inserting the fork rod of a forklift. This structure can facilitate the forklift rod to carry the upper mold and the lower mold. The present invention is provided with the transverse support steel plates 6 at both ends of the fork rod socket 8, and the transverse support steel plates 6 are flush with the ends of the fork rod socket. This structure can prevent the forklift rod from being deflected, making the forklift rod forking in more smoothly, and at the same time can improve the overall strength of the upper mold 2 and the lower mold 1.

[0036] like Figure 1-Figure 4As shown, as a preferred embodiment of the utility model, the number of the longitudinal support steel plates 5 is 3, which are welded on the bottom steel plate 4 at equal intervals, and the number of the transverse support steel plates 6 is 12. The shape of the first opening groove 12 or the second opening groove 22 is rectangular, and a reinforcing steel plate 9 is vertically welded on the bottom steel plate 4 on both sides of the first opening groove 12 or the second opening groove 22, and one end of the reinforcing steel plate 9 is welded to one side of the longitudinal support steel plate 5. Lifting holes 51 are provided on both ends of the longitudinal support steel plate 5 to facilitate the lifting of the upper mold 2 or the lower mold 1. By providing the reinforcing steel plate 9, the connection stability between the bottom steel plate and the pressure-maintaining tie rod 3 can be greatly improved.

[0037] like Figure 1-Figure 4 As shown, as a preferred embodiment of the utility model, the length of the bottom steel plate 4 is 150mm-250mm, preferably 180mm-220mm; the width is 80mm-150mm, preferably 100mm-120mm; the length of the top steel plate 7 is 130mm-230mm, preferably 160mm-200mm; the width is 60mm-130mm, preferably 80mm-100mm; the thickness of the bottom steel plate 4 is 20mm-40mm, preferably 28mm-32mm; the thickness of the longitudinal support steel plate 5, the transverse support steel plate 6, the top steel plate 7 and the reinforcement steel plate 9 are respectively 10mm-30mm, preferably 18mm-22mm.

[0038] The above is only a preferred embodiment of the present invention. Any slight modification, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A cold press forming die for a multilayer board, characterized in that: It includes a lower mold, an upper mold and several pressure-keeping rods, and 4-8 first opening grooves are respectively spaced apart on both sides of the lower mold, and the first opening grooves are connected vertically; a cold pressing space for cold pressing the multilayer board is provided between the upper mold and the lower mold, and 4-8 second opening grooves are respectively spaced apart on both sides of the upper mold, and the second opening grooves are connected vertically; the number of the pressure-keeping rods, the first opening grooves and the second opening grooves match, and the lower end of the pressure-keeping rod cooperates with the corresponding first opening groove, can be passed through the first opening groove and connected and fixed to the lower mold, or taken out from the first opening groove and separated from the lower mold; the upper end of the pressure-keeping rod cooperates with the corresponding second opening groove, can be passed through the second opening groove and connected and fixed to the upper mold, or taken out from the second opening groove and separated from the upper mold.

2. The cold press forming mold for the multilayer board according to claim 1, characterized in that: The pressure-maintaining pull rod includes a metal pull rod, a first gasket, a second gasket, a first screw and a second screw; the first gasket is movably sleeved on the outside of the lower end of the metal pull rod, the diameter of the first gasket is greater than the width of the first opening groove, the lower end of the metal pull rod is provided with a first external thread, the first screw is arranged on the lower side of the first gasket, and the first screw is screwed on the outside of the first external thread; the second gasket is movably sleeved on the outside of the upper end of the metal pull rod, the diameter of the second gasket is greater than the width of the second opening groove, the upper end of the metal pull rod is provided with a second external thread, the second screw is arranged on the upper side of the second gasket, and the second screw is screwed on the outside of the second external thread.

3. The cold press forming mold for the multilayer board according to claim 2, characterized in that: The number of the first screw and the number of the second screw are two respectively.

4. The cold press forming mold for the multilayer board according to claim 1, characterized in that: Six first opening grooves or second opening grooves are provided at equal intervals on both sides of the lower mold and the upper mold, and the number of the pressure-maintaining tie rods is 12.

5. The cold press forming mold for the multilayer board according to claim 1, characterized in that: The upper mold and the lower mold are symmetrical up and down, and the upper mold and the lower mold respectively include a bottom steel plate, a longitudinal support steel plate, a transverse support steel plate and a top steel plate. The overall shape of the bottom steel plate and the top steel plate is rectangular. The number of the longitudinal support steel plates is 2-4, and the 2-4 longitudinal support steel plates are welded on the bottom steel plate at intervals. The longitudinal support steel plate and the bottom steel plate are perpendicular to each other and parallel to the long side of the bottom steel plate; the number of the transverse support steel plates is more than 2, and the transverse support steel plates are welded on the bottom steel plate at intervals and welded to each other Between adjacent longitudinal supporting steel plates, the transverse supporting steel plate is perpendicular to the bottom steel plate and parallel to the wide side of the bottom steel plate, and the height of the transverse supporting steel plate is consistent with that of the longitudinal supporting steel plate; the top steel plate is welded to the longitudinal supporting steel plate and the transverse supporting steel plate, the top steel plate is parallel to the bottom steel plate, and the long side of the top steel plate is parallel to the long side of the bottom steel plate; the first opening groove or the second opening groove is opened at the long sides of both sides of the bottom steel plate, and the outer end of the first opening groove or the second opening groove is located outside the positive projection area of ​​the top steel plate falling on the bottom steel plate.

6. The cold press forming mold for the multilayer board according to claim 5, characterized in that: The longitudinal supporting steel plates 2 to 4 are respectively provided with two fork rod sockets for inserting the fork rod of a forklift.

7. The cold press forming mold for the multilayer board according to claim 6, characterized in that: The transverse supporting steel plates are respectively arranged at both ends of the fork rod socket, and the transverse supporting steel plates are flush with the end portions of the fork rod socket.

8. The cold press forming mold for the multilayer board according to claim 5, characterized in that: The number of the longitudinal support steel plates is 3, which are welded on the bottom steel plate at equal intervals, and the number of the transverse support steel plates is 12.

9. The cold press forming mold for a multilayer board according to claim 5, characterized in that: The first opening groove or the second opening groove is in the shape of a rectangle, and a reinforcing steel plate is vertically welded on the bottom steel plate on both sides of the first opening groove or the second opening groove, and one end of the reinforcing steel plate is welded to one side of the longitudinal supporting steel plate.

10. The cold press forming mold for a multilayer board according to claim 5, characterized in that: The length of the bottom steel plate is 150mm-250mm, and the width is 80mm-150mm; the length of the top steel plate is 130mm-230mm, and the width is 60mm-130mm; the thickness of the bottom steel plate is 20mm-40mm, and the thickness of the longitudinal supporting steel plate, transverse supporting steel plate, top steel plate and reinforcing steel plate are 10mm-30mm respectively.

Images