Transparent wood production equipment

Abstract

The invention discloses transparent wood production equipment, and relates to the technical field of wood processing. The equipment comprises a shell structure, a piston control system, a pressure control system and a charging tray control system. The equipment can be used for carrying out accelerated catalytic decolorization treatment on wood, accelerating resin permeation treatment and reducing bubble defects existing in transparent wood after resin permeation; the equipment is simple in structure and convenient to operate, various different operations can be realized by utilizing the same structure, and the equipment has very high practicability.

Description

Technical Field

[0001] The invention relates to the field of transparent wood manufacturing, and in particular to a decolorization treatment and resin injection process in the production process of transparent wood. Background Art

[0002] Wood is one of the most abundant natural renewable resources on earth. Modification of wood is a major method of utilizing wood. Transparent wood has become a research hotspot in wood modification in recent years due to its special optical properties and environmental characteristics. Transparent wood is considered to be an environmentally friendly alternative to glass. However, the preparation of transparent wood involves multiple complex and time-consuming steps such as decolorization, cleaning, resin injection and curing, which results in high cost of transparent wood and prevents it from being widely used.

[0003] The thermal conductivity of transparent wood is lower than that of glass, and the energy consumption in the preparation process is lower. If the problems of complex process and long preparation cycle in the preparation of transparent wood can be solved, the transparent wood industry can be promoted and developed to a great extent. Summary of the invention

[0004] The purpose of the present invention is to manufacture a transparent wood manufacturing device to simplify the manufacturing process of the transparent wood, shorten the preparation cycle of the transparent wood and reduce the bubble defects of the transparent wood.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a transparent wood production equipment, the equipment includes a base, and three bearing mounting holes arranged with one up and two down are arranged on the right side of the base, and each bearing hole on the right side of the base is installed with an angular contact ball bearing, and the three angular contact ball bearings are respectively installed with two tray control internal threaded gears located on the lower side and one tray control gear shaft located on the upper side.

[0006] The material tray control gear shaft is respectively meshed with the two material tray control internal threaded gears, and there is no contact between the two material tray control internal threaded gears. An angular contact ball bearing is installed on the right side of the material tray control internal threaded gear and the material tray control gear shaft. The three angular contact ball bearings are respectively installed in cooperation with the three bearing mounting holes on the left side of the horizontal motor box. A limiting washer is used to limit the position between the horizontal motor box and the base, and the two are connected by screws. A horizontal motor box cover is installed on the horizontal motor box for dust and water prevention, and the two are connected by screws.

[0007] A tray control stepper motor and a drive module are installed in the horizontal motor box, the tray control stepper motor is connected to the tray control gear shaft, the rotation angles of the tray control gear shaft and the tray control stepper motor shaft are bound to each other, two tray control lead screws are sleeved in the tray control internal threaded gears, the rotation of the tray control internal threaded gears can be converted into horizontal movement of the tray control lead screw, the tray control lead screw is connected to the tray, and their horizontal displacements are bound to each other.

[0008] The power of the tray control stepper motor is transmitted through the tray control gear shaft to the tray control internal thread gear and finally to the tray control lead screw to control the advance and retreat of the tray. The thread lead angle of the tray control lead screw can achieve self-locking conditions.

[0009] A piston chamber is installed above the base, and the two are fixedly connected by screws. A mounting hole is provided on the left side of the piston chamber for installing a normally closed solenoid valve.

[0010] The right end of the piston chamber is provided with a square opening for feeding and withdrawing materials, and a sealing gasket is installed on the outside of the opening. When the material tray enters from the square opening and reaches the set position, the piston chamber and the material tray jointly squeeze the sealing gasket to close the piston chamber.

[0011] A cylindrical piston cylinder for the piston to move up and down is provided in the piston chamber, a piston with a rubber ring is installed in the piston cylinder, the piston is connected to four piston control screw rods, a square bearing disk is installed above the piston chamber, five angular contact ball bearings are installed at the four corners and the center of the square bearing disk, four piston control internal thread gears are respectively installed in the four angular contact ball bearings located at the four corners of the square bearing disk, a piston control gear shaft is installed in the angular contact ball bearing located in the center of the square bearing disk, the piston control gear shaft is respectively meshed with the four piston control internal thread gears, and there is no contact between the four piston control internal thread gears, an angular contact ball bearing is respectively installed on the four piston control internal thread gears and one piston control gear shaft, and the five angular contact ball bearings are respectively matched with the bearing holes at the lower part of the vertical motor box, a limiting washer is provided between the vertical motor box and the square bearing disk, the vertical motor box, the limiting washer, the square bearing disk and the piston chamber are connected by screws in a top-to-bottom order, a vertical motor box cover is installed on the vertical motor box for dust and water prevention, and the two are connected by screws.

[0012] A piston-controlled stepper motor is installed in the vertical motor box, and the piston-controlled stepper motor is connected to the piston-controlled gear shaft. The rotation angles of the piston-controlled gear shaft and the piston-controlled stepper motor shaft are bound to each other. Four piston-controlled lead screws are respectively installed in four piston-controlled internal threaded gears. The rotation of the piston-controlled internal threaded gears can be converted into the vertical movement of the piston-controlled lead screw. The piston-controlled lead screw is connected to the piston, and the vertical displacements of the two are bound to each other.

[0013] The power of the piston control stepper motor is transmitted through the piston control gear shaft to the piston control internal thread gear and finally to the piston control screw rod to control the up and down movement of the piston and then control the air pressure in the piston chamber. The thread lead angle of the piston control screw rod can achieve self-locking conditions.

[0014] Preferably, the number of teeth on the tray control gear shaft of the tray control system is 12, the number of teeth on the tray control internal threaded gear is 25, the number of teeth on the piston control gear shaft of the piston control system is 15, and the number of teeth on the piston control internal threaded gear is 25; the module of the tray control gear shaft, the tray control internal threaded gear, the piston control gear shaft, and the piston control internal threaded gear is 2, the pressure angle is 20°, and the thickness is 6 mm.

[0015] Preferably, the minor diameter of the tray control screw and the piston control screw is 10 mm, the major diameter is 12 mm, the thread lead angle is 5°, the size of the tray control stepper motor and the piston control stepper motor is 42 mm*42 mm*40 mm, the rated voltage is 3.6 V, and the torque is 0.46 N·m.

[0016] According to the transparent wood manufacturing equipment mentioned above, transparent wood is produced, and the production steps include decolorization and resin injection.

[0017] The transparent wood manufacturing equipment comprises the following systems: a shell structure, a piston control system, a pressure control system, and a material tray control system.

[0018] In the decolorization step, the wood raw material needs to be placed in a tray and immersed in the decolorization agent, and then the tray control stepper motor is started to send the tray into the piston chamber. After the tray reaches the set position and squeezes the sealing gasket, the stepper motor can be temporarily turned off. Since the thread lead angle of the tray control screw and the tray control internal thread gear is sufficient to achieve the self-locking condition, the tray can still squeeze the sealing gasket and close the piston chamber after the tray control stepper motor is turned off. Then start the piston control stepper motor to make the piston rise, and the pressure in the piston chamber is reduced. After the piston rises to the highest point, the stepper motor can be temporarily turned off. Since the thread lead angle of the piston control screw and the piston control internal thread gear is sufficient to achieve the self-locking condition, the piston can still remain in the highest position after the piston control stepper motor is turned off. After the cavity in the wood is emptied in a low-pressure environment, the normally closed solenoid valve can be opened, and the pressure in the piston chamber can be balanced before closing the normally closed solenoid valve, and the piston control stepper motor can be started to lower the piston, and the pressure in the piston chamber increases. After the piston drops to the lowest point, the stepper motor can be temporarily closed. Since the thread lead angle of the piston control screw rod and the piston control internal thread gear is sufficient to achieve the self-locking condition, the piston can still be kept at the lowest position after the piston control stepper motor is closed. After the decolorizing agent is pressed into the wood raw material, the normally closed solenoid valve can be opened to balance the pressure in the piston chamber, and then the tray control stepper motor is started to pull out the tray and close the normally closed solenoid valve to obtain the wood raw material filled with the decolorizing agent. After the reaction decolorization and washing and drying, the decolorized wood can be obtained.

[0019] In the resin injection step, the bleached wood obtained in the bleaching step needs to be placed in a tray and immersed in the resin to be injected. Then, the tray control stepper motor is started to send the tray into the piston chamber. After the tray reaches the set position and squeezes the sealing gasket, the stepper motor can be temporarily turned off. Since the thread lead angle of the tray control screw and the tray control internal thread gear is sufficient to achieve the self-locking condition, the tray can still squeeze the sealing gasket and close the piston chamber after the tray control stepper motor is turned off. Then, the piston control stepper motor is started to raise the piston, and the pressure in the piston chamber is reduced. After the piston rises to the highest point, the stepper motor can be temporarily turned off. Since the thread lead angle of the piston control screw and the piston control internal thread gear is sufficient to achieve the self-locking condition, the piston can still remain in the highest position after the piston control stepper motor is turned off. After the cavity in the wood is emptied in a low-pressure environment, the normally closed solenoid valve can be opened to balance the pressure in the piston chamber, and then the normally closed solenoid valve is closed, and the piston control stepper motor is started to lower the piston, and the pressure in the piston chamber increases. After the piston drops to the lowest point, the stepper motor can be temporarily closed. Since the thread lead angle of the piston control screw and the piston control internal thread gear is sufficient to achieve the self-locking condition, the piston can still be kept at the lowest position when the piston control stepper motor is turned off. After the resin is pressed into the wood raw material, the normally closed solenoid valve can be opened to balance the pressure in the piston chamber, and then the tray control stepper motor is started to extract the tray and close the normally closed solenoid valve to obtain the decolorized wood filled with resin. Then the decolorized wood filled with resin is placed in a mold and cured to obtain a transparent wood product.

[0020] The beneficial effects of the present invention are as follows: the same structure can complete the two production steps of decolorization and resin injection, the equipment structure is simple, the maintenance work is simple, the energy consumption in the production process is extremely low, and the production efficiency of transparent wood can be effectively improved. Each test operation step is easy to operate and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An exploded axonometric view of a facility producing transparent wood;

[0022] Figure 2 It is a schematic diagram of the shell structure;

[0023] Figure 3 This is the structure diagram of the tray control system;

[0024] Figure 4 It is a schematic diagram of the pressure control system;

[0025] Figure 5 Schematic diagram of the piston control system. DETAILED DESCRIPTION

[0026] Figures 1 to 5A transparent wood production device shown in the figure includes a base 114, and three bearing installation holes arranged with one up and two down are arranged on the right side of the base 114. An angular contact ball bearing 110 is installed in each bearing hole on the right side of the base 114, and two tray control internal threaded gears 402 located on the lower side and a tray control gear shaft 403 located on the upper side are respectively installed in the three angular contact ball bearings 110.

[0027] The tray control gear shaft 403 is respectively meshed with the two tray control internal threaded gears 402, and there is no contact between the two tray control internal threaded gears 402. An angular contact ball bearing 110 is installed on the right side of the tray control internal threaded gear 402 and the tray control gear shaft 403. The three angular contact ball bearings 110 are respectively installed in cooperation with the three bearing mounting holes on the left side of the horizontal motor box 112. A limiting washer 113 is provided between the horizontal motor box 112 and the base 114, and the two are connected by screws. A horizontal motor box cover 111 is installed on the horizontal motor box 112 for dust and water prevention, and the two are connected by screws.

[0028] The horizontal motor box 112 is installed with a tray control stepper motor 404 and a drive module. The tray control stepper motor 404 is connected to the tray control gear shaft 403. The rotation angles of the tray control gear shaft 403 and the tray control stepper motor 404 shaft are bound to each other. Two tray control screw rods 401 are sleeved in the tray control internal thread gear 402. The rotation of the tray control internal thread gear 402 can be converted into the horizontal movement of the tray control screw rod 401. The tray control screw rod 401 is connected to the tray 109 and their horizontal displacements are bound to each other.

[0029] The power of the tray control stepper motor 404 is transmitted through the tray control gear shaft 403 and then to the tray control internal thread gear 402, and finally to the tray control screw rod 401 to control the advance and retreat of the tray 109. The thread lead angle of the tray control screw rod 401 can achieve a self-locking condition.

[0030] A piston chamber 101 is installed above the base 114 , and the two are fixedly connected by screws. A mounting hole is provided on the left side of the piston chamber 101 for mounting a normally closed solenoid valve 301 .

[0031] The right end of the piston chamber 101 is provided with a square opening for feeding and withdrawing materials, and a sealing gasket 108 is installed on the outside of the opening. When the material tray 109 enters from the square opening and reaches the set position, the piston chamber 101 and the material tray 109 jointly squeeze the sealing gasket 108 to close the piston chamber 101.

[0032] A cylindrical piston cylinder is provided inside the piston chamber 101 for the piston to move up and down, a piston 107 with a rubber ring is installed in the piston cylinder, the piston 107 is connected to four piston control screw rods 201, a square bearing plate 102 is installed above the piston chamber 101, five angular contact ball bearings 106 are installed at the four corners and the center of the square bearing plate 102, four piston control internal threaded gears 202 are respectively installed in the four angular contact ball bearings 106 at the four corners of the square bearing plate 102, a piston control gear shaft 203 is installed in the angular contact ball bearing 106 at the center of the square bearing plate 102, and the piston control gear shaft 203 is respectively connected to the four piston control The internally threaded gears 202 are meshed with each other, and there is no contact between the four piston-controlled internally threaded gears 202. An angular contact ball bearing 106 is installed on each of the four piston-controlled internally threaded gears 202 and one piston-controlled gear shaft 203. The five angular contact ball bearings 106 are respectively matched with the bearing holes at the lower part of the vertical motor box 104. A limiting washer 103 is provided between the vertical motor box 104 and the square bearing disk 102. The vertical motor box 104, the limiting washer 103, the square bearing disk 102 and the piston chamber 101 are connected by screws in order from top to bottom. A vertical motor box cover 105 is installed on the vertical motor box 104 for dust and water prevention, and the two are connected by screws.

[0033] A piston-controlled stepper motor 204 is installed in the vertical motor box 104, and the piston-controlled stepper motor 204 is connected to the piston-controlled gear shaft 203. The rotation angles of the piston-controlled gear shaft 203 and the piston-controlled stepper motor 204 shaft are bound to each other. Four piston-controlled lead screws 201 are respectively installed in four piston-controlled internal threaded gears 202. The rotation of the piston-controlled internal threaded gears 202 can be converted into the vertical movement of the piston-controlled lead screw 201. The piston-controlled lead screw 201 is connected to the piston 107, and the vertical displacements of the two are bound to each other.

[0034] The power of the piston control stepper motor 204 is transmitted through the piston control gear shaft 203 to the piston control internal threaded gear 202 and finally to the piston control screw 201 to control the up and down movement of the piston 107 and thus control the air pressure in the piston chamber 101. The thread lead angle of the piston control screw 201 can achieve a self-locking condition.

[0035] Preferably, the number of teeth of the tray control gear shaft 403 of the tray control system 4 is 12, the number of teeth of the tray control internal threaded gear 402 is 25, the number of teeth of the piston control gear shaft 203 of the piston control system 2 is 15, and the number of teeth of the piston control internal threaded gear 202 is 25; the module of the tray control gear shaft 403, the tray control internal threaded gear 402, the piston control gear shaft 203, and the piston control internal threaded gear 202 is 2, the pressure angle is 20°, and the thickness is 6 mm.

[0036] Preferably, the minor diameter of the tray control screw 401 and the piston control screw 201 is 10 mm, the major diameter is 12 mm, the thread lead angle is 5°, the size of the tray control stepper motor 404 and the piston control stepper motor 204 is 42 mm*42 mm*40 mm, the rated voltage is 3.6 V, and the torque is 0.46 N·m.

[0037] The transparent wood manufacturing equipment comprises the following systems: a shell structure 1, a piston control system 2, a pressure control system 3, and a material tray control system 4.

[0038] The transparent wood manufacturing equipment can perform the following production steps:

[0039] Decolorization step: the wood material needs to be placed in the tray 109 and immersed in the decolorization reagent, then the tray control stepper motor 404 is started, the tray 109 is sent into the piston chamber 101, and the stepper motor can be temporarily turned off after the tray 109 reaches the set position and squeezes the sealing gasket 108. Since the thread lead angle of the tray control screw rod 401 and the tray control internal thread gear 402 is sufficient to achieve the self-locking condition, the tray 109 can still squeeze the sealing gasket 108 after the tray control stepper motor 404 is turned off, and the piston chamber 101 is closed. Then the piston control stepper motor 204 is started to make the piston 107 rise, and the pressure in the piston chamber 101 is reduced. After the piston 107 rises to the highest point, the stepper motor can be temporarily turned off. Since the thread lead angle of the piston control screw rod 201 and the piston control internal thread gear 202 is sufficient to achieve the self-locking condition, the piston 107 can still remain in the highest position after the piston control stepper motor 204 is turned off. After the cavity in the wood is emptied in a low-pressure environment, the normally closed electromagnetic valve 301 can be opened to balance the pressure in the piston chamber 101, and then the normally closed electromagnetic valve 301 is closed, and the piston control stepper motor 204 is started to lower the piston 107, and the pressure in the piston chamber 101 increases. After the piston 107 drops to the lowest point, the piston control stepper motor 204 can be temporarily closed. Since the thread lead angle of the piston control screw rod 201 and the piston control internal thread gear 202 is sufficient to achieve a self-locking condition, the piston 107 can still be kept at the lowest position after the piston control stepper motor 204 is closed. After the decolorizing agent is pressed into the wood raw material, the normally closed electromagnetic valve 301 can be opened to balance the pressure in the piston chamber 101, and then the tray control stepper motor 404 is started to extract the tray 109 and close the normally closed electromagnetic valve 301 to obtain the wood raw material filled with the decolorizing agent, and the decolorized wood can be obtained after the reaction decolorization and washing and drying.

[0040] Resin injection step: the bleached wood needs to be placed in the tray 109 and immersed in the required resin, then the tray control stepper motor 404 is started to send the tray 109 into the piston chamber 101. After the tray 109 reaches the set position and squeezes the sealing gasket 108, the stepper motor can be temporarily turned off. Since the thread lead angle of the tray control screw rod 401 and the tray control internal thread gear 402 is sufficient to achieve the self-locking condition, the tray 109 can still squeeze the sealing gasket 108 after the tray control stepper motor 404 is turned off, closing the piston chamber 101. Then start the piston control stepper motor 204 to make the piston 107 rise, the pressure in the piston chamber 101 is reduced, and the stepper motor can be temporarily turned off after the piston 107 rises to the highest point. Since the thread lead angle of the piston control screw rod 201 and the piston control internal thread gear 202 is sufficient to achieve the self-locking condition, the piston 107 can still remain in the highest position after the piston control stepper motor 204 is turned off. After the cavity in the wood to be bleached is emptied in a low-pressure environment, the normally closed solenoid valve 301 can be opened to balance the pressure in the piston chamber 101, and then the normally closed solenoid valve 301 is closed, and the piston control stepper motor 204 is started to lower the piston 107, and the pressure in the piston chamber 101 increases. After the piston 107 drops to the lowest point, the piston control stepper motor 204 can be temporarily closed. Since the thread lead angle of the piston control screw rod 201 and the piston control internal thread gear 202 is sufficient to achieve a self-locking condition, the piston 107 can still be kept at the lowest position after the piston control stepper motor 204 is closed. After the required resin is pressed into the bleached wood, the normally closed solenoid valve 301 can be opened to balance the pressure in the piston chamber 101, and then the tray control stepper motor 404 is started to extract the tray 109 and close the normally closed solenoid valve 301 to obtain the bleached wood filled with the required resin. The bleached wood filled with resin is placed in a mold and cured to obtain a transparent wood product.

Claims

1. A transparent wood production device, the device comprising a base (114), wherein the right side of the base (114) is provided with three bearing installation holes arranged with one up and two down, wherein each bearing hole on the right side of the base (114) is provided with an angular contact ball bearing (110), wherein two tray control internal thread gears (402) located at the lower side and one tray control gear shaft (403) located at the upper side are respectively provided with the three angular contact ball bearings, wherein the tray control gear shaft (403) is respectively meshed with the two tray control internal thread gears (402), and there is no contact between the two tray control internal thread gears (402), wherein each angular contact ball bearing (110) is respectively provided with the right side of the tray control internal thread gear (402) and the tray control gear shaft (403), wherein the three angular contact ball bearings (110) are respectively installed in cooperation with three bearing installation holes on the left side of a horizontal motor box (112), wherein the horizontal motor box (112) is provided with a contact between the base (114) and the base (114). The horizontal motor box (112) and the base (114) are connected by a limit washer (113) therebetween, screws are used to connect the horizontal motor box (112), a tray control stepping motor (404) and a control circuit are installed in the horizontal motor box (112), the tray control stepping motor (404) is connected to the tray control gear shaft (403), the rotation angles of the tray control gear shaft (403) and the tray control stepping motor (404) shaft are bound to each other, and the horizontal motor box (112) is connected to the base (114) by screws. A horizontal motor box cover (111) is installed on the top for dust and water prevention. The horizontal motor box (112) and the horizontal motor box cover (111) are connected by screws. Two material tray control screw rods (401) are installed in the material tray control internal thread gear (402). The rotation of the material tray control internal thread gear (402) can be converted into the horizontal movement of the material tray control screw rod (401). The material tray control screw rod (401) is connected to the material tray (109) and the horizontal displacement of the two is bound to each other. The power of the tray control stepper motor (404) is transmitted through the tray control gear shaft (403) and then to the tray control internal thread gear (402) and finally to the tray control screw rod (401) to control the advance and retreat of the tray. The thread lead angle of the tray control screw rod (401) can achieve a self-locking condition. A piston chamber (101) is installed above the base (114), and the two are fixedly connected by screws. A mounting hole is provided on the left side of the piston chamber (101) for installing a normally closed solenoid valve (301). A square opening for feeding and withdrawing materials is provided at the right end of the piston chamber (101), and a sealing gasket (108) is installed on the outside of the opening. When the material tray (109) enters from the square opening and reaches the set position, the piston chamber (101) and the material tray (109) jointly squeeze the sealing gasket (108) to close the piston chamber (101). A cylindrical piston cylinder for the piston to move up and down is provided in the piston chamber, and a piston (107) with a rubber ring is installed in the piston cylinder. The piston (1 07) is connected to four piston control screw rods (201), a square bearing plate (102) is installed above the piston chamber (101), five angular contact ball bearings (106) are installed at the four corners and the center of the square bearing plate (102), four piston control internal thread gears (202) are respectively installed in the four angular contact ball bearings (106) located at the four corners of the square bearing plate (102), a piston control gear shaft (203) is installed in the angular contact ball bearing (106) located in the center of the square bearing plate (102), the piston control gear shaft (203) is respectively meshed with the four piston control internal thread gears (202), and the four piston control internal thread gears (202) are meshed with each other. 02), an angular contact ball bearing is installed on each of the four piston-controlled internal thread gears (202) and a piston-controlled gear shaft (203), and the five angular contact ball bearings (106) are respectively matched with the bearing holes at the bottom of the vertical motor box (104), and the four piston-controlled screw rods (201) are respectively installed in the four piston-controlled internal thread gears (202). The rotation of the piston-controlled internal thread gear (202) can be converted into the vertical movement of the piston-controlled screw rod (201). The piston-controlled screw rod (201) is connected to the piston (107) and the vertical displacement of the two is bound to each other. A limiting washer is provided between the vertical motor box (104) and the square bearing plate (102). (103) limit, the vertical motor box (104), the limit washer (103), the square bearing plate (102) and the piston chamber (101) are connected by screws in order from top to bottom, a piston-controlled stepper motor (204) is installed in the vertical motor box (104), the piston-controlled stepper motor (204) is connected to the piston-controlled gear shaft (203), and the rotation angles of the piston-controlled gear shaft (203) and the piston-controlled stepper motor (204) shaft are bound to each other, a vertical motor box cover (105) is installed on the vertical motor box (104) for dust and water prevention, and the vertical motor box (104) and the vertical motor box cover (105) are connected by screws; The power of the piston control stepper motor (204) is transmitted through the piston control gear shaft (203) and then to the piston control internal thread gear (202) and finally to the piston control screw rod (201) to control the up and down movement of the piston (107) and thus control the air pressure in the piston chamber (101). The thread lead angle of the piston control screw rod (201) can achieve a self-locking condition.

2. The transparent wood production equipment according to claim 1, characterized in that: The number of teeth of the tray control gear shaft (403) of the tray control control system (4) is 12, the number of teeth of the tray control internal thread gear (402) is 25, the number of teeth of the piston control gear shaft (203) of the piston control system (2) is 15, and the number of teeth of the piston control internal thread gear (202) is 25; the module of the tray control gear shaft (403), the tray control internal thread gear (402), the piston control gear shaft (203), and the piston control internal thread gear (202) is 2, the pressure angle is 20°, and the thickness is 6 mm; the minor diameter of the tray control screw rod (401) and the piston control screw rod (201) is 10 mm, the major diameter is 12 mm, the thread lead angle is 5°, the dimensions of the tray control stepping motor (404) and the piston control stepping motor (204) are 42 mm*42 mm*40 mm, the rated voltage is 3.6 V, and the torque is 0.46 N·m.

Images