Forming machine for paper tray production

Abstract

The utility model discloses a forming machine for paper tray production. The forming machine comprises a machine base, a lower forming die, an upper forming die, a pneumatic cleaning mechanism and a negative pressure dust collecting mechanism. The pneumatic cleaning mechanism is fixedly assembled between the lower forming die and the upper forming die and comprises a pair of lower die cleaning pipes, upper die cleaning pipes are fixedly assembled above the pair of lower die cleaning pipes, and the upper die cleaning pipes and the upper forming die are arranged in a matched mode; the corresponding sides of the pair of lower mold cleaning pipes and the upper mold cleaning pipes are fixedly connected with a plurality of sets of evenly-distributed air pressure nozzles, and communicating air pipes are fixedly communicated between the lower mold cleaning pipes and the upper mold cleaning pipes. The negative pressure dust collection mechanism is fixedly assembled on one side of the machine base. By arranging the pneumatic cleaning mechanism and the negative pressure dust collecting mechanism, the forming machine for paper support production has a mold cleaning function, impurities such as residual paper pulp in the forming mold in the using process can be cleaned, and the paper support forming quality of the forming machine for paper support production is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of paper tray forming, and in particular relates to a forming machine for producing paper trays. Background Art

[0002] Paper trays are made of carton scraps, wood pulp and other raw materials. After the pulp is crushed, it is mixed into a slurry of a certain concentration and then formed into a packaging tray by vacuum adsorption of the slurry through a CNC mold. Due to its good shockproof, impact-resistant, anti-static and anti-corrosion advantages, it is widely used in the packaging process of electronics, electrical appliances, computers, various mechanical parts, industrial instruments and other fields.

[0003] At present, the common paper tray production process mainly includes: mold design, slurry preparation, pressing and drying. Among them, the paper tray production molding machine is a type of equipment used to press the slurry. The common paper tray production molding machine mainly consists of: a frame, a mold assembly component, a drive mechanism, an injection mechanism and a control system. When in use, the paper tray molding mold is assembled in the mold assembly component, and the mold is driven by the drive mechanism to close the mold, and then the slurry is injected into the mold cavity of the molding mold through the injection mechanism, thereby realizing the production and molding of the paper tray.

[0004] Most of the common paper tray production forming machines in the prior art do not have a mold cleaning function, which makes it impossible for the paper tray production forming machines to automatically clean the forming molds during use. The forming molds assembled on the paper tray production forming machines are prone to residual pulp impurities and other impurities sticking during use, resulting in poor controllability of the paper tray forming quality of the paper tray production forming machines.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0006] The utility model aims to provide a paper tray production forming machine, which can automatically clean the paper tray forming mold, thereby improving the paper tray forming quality of the paper tray production forming machine.

[0007] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0008] A forming machine for producing paper trays comprises a machine base, a forming lower die, a forming upper die, a pneumatic cleaning mechanism and a negative pressure dust collecting mechanism.

[0009] A lower molding die is fixedly mounted above the machine base, an upper molding die is mounted above the lower molding die, and the lower molding die is matched with the upper molding die.

[0010] The pneumatic cleaning mechanism is fixedly installed between the molding lower mold and the molding upper mold, and the pneumatic cleaning mechanism includes a pair of lower mold cleaning tubes, which are symmetrically installed on both sides of the molding lower mold, and upper mold cleaning tubes are fixedly installed above the pair of lower mold cleaning tubes. The upper mold cleaning tube is arranged in cooperation with the molding upper mold, and the corresponding sides of the pair of lower mold cleaning tubes and the upper mold cleaning tubes are fixedly connected with multiple groups of evenly distributed air pressure nozzles, and the lower mold cleaning tube and the upper mold cleaning tube are fixedly connected with an air conduction pipe.

[0011] The negative pressure dust collecting mechanism is fixedly assembled on one side of the machine base, and the negative pressure dust collecting mechanism includes a dust collecting cylinder, and a plurality of exhaust fans are fixedly installed below the dust collecting cylinder. A conducting pipe joint is fixedly connected to the bottom of the dust collecting cylinder, and a conveying air pipe is fixedly connected between the conducting pipe joint and a pair of conducting air pipes. A dust collecting pipe is fixedly assembled on one side of the machine base close to the dust collecting cylinder, and the dust collecting pipe is arranged between the lower molding die and the upper molding die.

[0012] In one or more embodiments of the utility model, an upper die assembly seat is fixedly connected above the upper die of the forming. The upper die assembly seat plays the role of assembly fixation and lifting and moving control for the upper die of the forming. Multiple groups of evenly distributed Green columns are slidably assembled on the outer side of the upper die assembly seat, and the multiple groups of Green columns are fixedly assembled above the machine base. The multiple groups of Green columns play the role of assembly limit and movement guide for the upper die assembly seat.

[0013] In one or more embodiments of the utility model, a top plate is fixedly installed on the top of the plurality of groups of Green columns. The top plate plays a role in assembling and fixing the hydraulic cylinder. A hydraulic cylinder is fixedly installed above the top plate, and the telescopic rod of the hydraulic cylinder is fixedly connected to the upper mold assembly seat. The upper mold assembly seat is lifted and lowered by controlling the movement of the telescopic rod of the hydraulic cylinder, so as to facilitate the control of the closing and parting process of the molding lower mold and the molding upper mold.

[0014] In one or more embodiments of the utility model, both ends of a pair of lower mold cleaning tubes and upper mold cleaning tubes are fixedly connected with assembly shafts. The lower mold cleaning tube, the upper mold cleaning tube and the fixed sleeve are assembled and limited by the assembly shaft. The other end of the assembly shaft is rotatably connected with a fixed sleeve, and the fixed sleeve is slidably sleeved on the outer side of the Green column. The lower mold cleaning tube and the upper mold cleaning tube are assembled and limited and the position is adjusted by the fixed sleeve.

[0015] In one or more embodiments of the utility model, a locking bolt is threadedly connected to one side of the plurality of fixed sleeves, and the locking bolt is arranged in cooperation with the assembly shaft. The assembly shaft assembled in the fixed sleeve is locked and fixed by controlling the locking bolt to rotate and move, thereby facilitating the fixing and locking of the lower mold cleaning tube and the upper mold cleaning tube.

[0016] In one or more embodiments of the utility model, a plurality of groups of uniformly distributed first telescopic rods are fixedly connected between the fixed sleeve and the upper mold assembly seat. The fixed sleeve and the upper mold assembly seat are connected and limited by the plurality of groups of first telescopic rods, so that the fixed sleeve can move synchronously with the movement of the upper mold assembly seat under the action of the first telescopic rods, thereby reducing the adverse effect of the fixed sleeve on the lifting state of the upper mold assembly seat. A plurality of groups of uniformly distributed second telescopic rods are fixedly connected between a pair of fixed sleeves set on the outer side of the Green column. A pair of fixed sleeves set on the outer side of the Green column are assembled and connected by a plurality of groups of fixed sleeves, so that the upper mold cleaning tube can move synchronously with the movement of the lower mold cleaning tube under the action of the fixed sleeve.

[0017] In one or more embodiments of the utility model, a tube cover is fixedly installed on the top of the dust collecting tube, and the tube cover cooperates with the dust collecting tube to form a closed flow guide tube. The airflow is guided through the closed flow guide tube.

[0018] In one or more embodiments of the utility model, a filter screen is fixedly installed in the dust collecting cylinder, the filter screen is arranged above the multiple exhaust fans, and a guide gap is formed between the cylinder cover and the dust collecting cylinder. It is convenient to filter dust from the gas guided by the negative pressure guide pipe through the filter screen, which not only improves the cleanliness of the compressed gas delivered by the air pressure nozzle, but also can filter impurities from the impurity gas extracted by the dust collecting pipe.

[0019] In one or more embodiments of the utility model, a negative pressure guide pipe is connected between the cylinder cover and the dust collecting pipe, and the negative pressure guide pipe is arranged in cooperation with the filter cylinder. The negative pressure guide pipe serves to connect the cylinder cover and the dust collecting pipe, so that the dust collecting pipe generates negative pressure under the action of multiple sets of exhaust fans, thereby facilitating the negative pressure collection of impurity air blown between the lower molding die and the upper molding die.

[0020] Compared with the prior art, the utility model provides a pneumatic cleaning mechanism and a negative pressure dust collection mechanism so that the paper tray production forming machine has a mold cleaning function, which can clean impurities such as pulp remaining inside the forming mold during use, thereby improving the paper tray forming quality of the paper tray production forming machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A three-dimensional diagram of a forming machine for producing paper trays in one embodiment of the utility model;

[0023] Figure 2 A second angle perspective view of a forming machine for producing paper trays in one embodiment of the utility model;

[0024] Figure 3 for Figure 2 Schematic diagram of the structure at A in the middle;

[0025] Figure 4 A third angle perspective view of a forming machine for producing paper trays in one embodiment of the utility model;

[0026] Figure 5 It is a front view of a forming machine for producing paper trays in one embodiment of the utility model;

[0027] Figure 6 It is a partial structural cross-sectional view of a forming machine for producing paper trays in one embodiment of the utility model;

[0028] Figure 7 for Figure 6 Schematic diagram of the structure at point B in the middle.

[0029] Description of main reference numerals:

[0030] 1-machine base, 101-molding lower mold, 102-molding upper mold, 103-upper mold assembly base, 104-Green column, 105-top plate, 106-hydraulic cylinder, 2-pneumatic cleaning mechanism, 201-lower mold cleaning pipe, 202-upper mold cleaning pipe, 203-air pressure nozzle, 204-conducting air pipe, 205-assembly shaft, 206-fixing sleeve, 207-locking bolt, 208-first telescopic rod, 209-second telescopic rod, 3-negative pressure dust collection mechanism, 301-dust collecting cylinder, 302-exhaust fan, 303-conducting pipe joint, 304-delivery air pipe, 305-dust collecting pipe, 306-cylinder cover, 307-filter net cylinder, 308-negative pressure guide pipe. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] like Figures 1 to 7 As shown, a forming machine for producing paper trays in one embodiment of the utility model includes: a machine base 1, a forming lower mold 101, a forming upper mold 102, a pneumatic cleaning mechanism 2, and a negative pressure dust collection mechanism 3.

[0033] like Figures 5 and 6 As shown, a lower molding die 101 is fixedly mounted above the machine base 1, and an upper molding die 102 is mounted above the lower molding die 101. The lower molding die 101 and the upper molding die 102 are arranged in cooperation with each other. The pulp is pressed and molded by the cooperation between the lower molding die 101 and the upper molding die 102.

[0034] like Figure 1 As shown, an upper die assembly seat 103 is fixedly connected to the upper portion of the molding upper die 102. The upper die assembly seat 103 plays the role of assembling, fixing, lifting and moving control for the molding upper die 102.

[0035] like Figure 1 As shown, the outer side of the upper die assembly seat 103 is slidably assembled with multiple groups of evenly distributed Green columns 104, and the multiple groups of Green columns 104 are fixedly assembled above the machine base 1. The multiple groups of Green columns 104 play the role of assembly limit and movement guide for the upper die assembly seat 103.

[0036] like Figure 1 As shown, a top plate 105 is fixedly installed on the top of the multiple groups of Green columns 104. The top plate 105 plays a role in assembling and fixing the hydraulic cylinder 106.

[0037] like Figure 1 As shown, a hydraulic cylinder 106 is fixedly mounted above the top plate 105, and a telescopic rod of the hydraulic cylinder 106 is fixedly connected to the upper die assembly seat 103. The upper die assembly seat 103 is lifted and lowered by controlling the movement of the telescopic rod of the hydraulic cylinder 106, so as to facilitate the control of the closing and parting process of the molding lower die 101 and the molding upper die 102.

[0038] Specifically, the hydraulic cylinder 106 is commercially available and can be directly purchased and used.

[0039] like Figure 5As shown, the pneumatic cleaning mechanism 2 is fixedly assembled between the lower molding die 101 and the upper molding die 102. The pneumatic cleaning mechanism 2 sprays compressed gas to the lower molding die 101 and the upper molding die 102 to perform a blowing cleaning function on the lower molding die 101 and the upper molding die 102.

[0040] like Figures 2 to 3 As shown, the pneumatic cleaning mechanism 2 includes a pair of lower mold cleaning pipes 201, which are symmetrically mounted on both sides of the molding lower mold 101. The molding lower mold 101 is cleaned by blowing air through the pair of lower mold cleaning pipes 201. An upper mold cleaning pipe 202 is fixedly mounted above the pair of lower mold cleaning pipes 201, and the upper mold cleaning pipe 202 is arranged in cooperation with the molding upper mold 102. The molding upper mold 102 is cleaned by blowing air through the pair of upper mold cleaning pipes 202.

[0041] like Figures 2 to 3 As shown, a pair of lower mold cleaning pipes 201 and upper mold cleaning pipes 202 are fixedly connected to a plurality of evenly distributed air pressure nozzles 203 on one side thereof. It is convenient to eject compressed gas through the plurality of air pressure nozzles 203, so as to facilitate the blowing and cleaning of the lower mold 101 and the upper mold 102.

[0042] like Figures 2 to 3 As shown, a conducting air pipe 204 is fixedly connected between the lower mold cleaning pipe 201 and the upper mold cleaning pipe 202. The conducting air pipe 204 connects and conducts the lower mold cleaning pipe 201 and the upper mold cleaning pipe 202.

[0043] like Figures 2 to 6 As shown, both ends of a pair of lower mold cleaning tubes 201 and upper mold cleaning tubes 202 are fixedly connected with assembly shafts 205. The assembly shafts 205 are used to assemble and limit the lower mold cleaning tubes 201, upper mold cleaning tubes 202 and fixed sleeves 206.

[0044] like Figures 2 to 6 As shown, the other end of the assembly shaft 205 is rotatably connected to a fixed sleeve 206, and the fixed sleeve 206 is slidably sleeved on the outer side of the Green column 104. The lower mold cleaning tube 201 and the upper mold cleaning tube 202 are assembled and limited and position adjusted by the fixed sleeve 206.

[0045] like Figures 2 to 3 As shown, a locking bolt 207 is threadedly connected to one side of each of the plurality of fixed sleeves 206, and the locking bolt 207 is arranged in cooperation with the assembly shaft 205. The assembly shaft 205 assembled in the fixed sleeve 206 is locked and fixed by controlling the locking bolt 207 to rotate and move, thereby facilitating the fixing and locking of the lower mold cleaning tube 201 and the upper mold cleaning tube 202.

[0046] like Figures 2 to 3As shown, a plurality of groups of evenly distributed first telescopic rods 208 are fixedly connected between the fixed sleeve 206 and the upper die assembly seat 103. The fixed sleeve 206 and the upper die assembly seat 103 are connected and limited by the plurality of groups of first telescopic rods 208, so that the fixed sleeve 206 can move synchronously with the movement of the upper die assembly seat 103 under the action of the first telescopic rods 208, thereby reducing the adverse effects of the fixed sleeve 206 on the lifting and lowering state of the upper die assembly seat 103.

[0047] like Figures 2 to 3 As shown, a plurality of evenly distributed second telescopic rods 209 are fixedly connected between a pair of fixed sleeves 206 sleeved on the outer side of the Green column 104. The pair of fixed sleeves 206 sleeved on the outer side of the Green column 104 are assembled and connected by the plurality of fixed sleeves 206, so that the upper mold cleaning tube 202 can move synchronously with the movement of the lower mold cleaning tube 201 under the action of the fixed sleeves 206.

[0048] like Figures 4 to 7 As shown, the negative pressure dust collecting mechanism 3 is fixedly assembled on one side of the machine base 1, and the negative pressure dust collecting mechanism 3 includes a dust collecting cylinder 301. The dust collecting cylinder 301 temporarily stores and guides the airflow generated during the operation of the multiple exhaust fans 302.

[0049] like Figures 4 to 7 As shown, a tube cover 306 is fixedly installed on the top of the dust collecting tube 301, and the tube cover 306 cooperates with the dust collecting tube 301 to form a closed guide tube. The airflow is guided through the closed guide tube.

[0050] like Figures 4 to 7 As shown, a plurality of exhaust fans 302 are fixedly installed below the dust collecting barrel 301, a connecting pipe joint 303 is fixedly connected to the bottom of the dust collecting barrel 301, a conveying air pipe 304 is fixedly connected between the connecting pipe joint 303 and a pair of connecting air pipes 204, a dust collecting pipe 305 is fixedly installed on one side of the machine base 1 close to the dust collecting barrel 301, and the dust collecting pipe 305 is arranged between the molding lower mold 101 and the molding upper mold 102.

[0051] like Figures 4 to 7 As shown, a filter screen cylinder 307 is fixedly installed in the dust collecting cylinder 301, and the filter screen cylinder 307 is arranged above the multiple exhaust fans 302, and a guide gap is formed between the cylinder cover 306 and the dust collecting cylinder 301. It is convenient to filter dust from the gas guided by the negative pressure guide pipe 308 through the filter screen cylinder 307, which not only improves the cleanliness of the compressed gas delivered by the air pressure nozzle 203, but also can filter impurities from the impurity gas extracted by the dust collecting pipe 305.

[0052] like Figures 4 to 7As shown, a negative pressure guide pipe 308 is connected between the cylinder cover 306 and the dust collecting pipe 305, and the negative pressure guide pipe 308 is arranged in cooperation with the filter cylinder 307. The negative pressure guide pipe 308 serves to connect the cylinder cover 306 and the dust collecting pipe 305, so that the dust collecting pipe 305 generates negative pressure under the action of the multiple groups of exhaust fans 302, thereby facilitating the negative pressure collection of the impurity air blown between the molding lower mold 101 and the molding upper mold 102.

[0053] It is worth noting that the air delivery pipe 304 and the negative pressure guide pipe 308 can be externally connected to control valves such as solenoid valves during specific use. The conduction state of the air delivery pipe 304 and the negative pressure guide pipe 308 can be controlled by controlling the control valves, thereby facilitating the control of the cleaning state of the molding lower mold 101 and the molding upper mold 102.

[0054] When in use, the operation of the hydraulic cylinder 106 is controlled so that the upper mold assembly seat 103 moves downward under the action of the extension of the telescopic rod of the hydraulic cylinder 106, so that the lower mold 101 and the upper mold 102 are closed. Subsequently, pulp can be injected into the molding cavity between the lower mold 101 and the upper mold 102, and the pulp is pressed and molded by the mutual cooperation of the lower mold 101 and the upper mold 102.

[0055] When the pulp is formed, the lower mold 101 and the upper mold 102 are separated by controlling the telescopic rod of the hydraulic cylinder 106 to retract. After the separation is completed, the pressed paper tray can be unloaded. At the same time, the gas in the dust collecting cylinder 301 can be transported to the pair of lower mold cleaning pipes 201 and the upper mold cleaning pipes 202 along the conducting pipe joint 303, the conveying air pipe 304 and the conducting air pipe 204 under the action of the exhaust fan 302, and the compressed gas is sprayed to the lower mold 101 and the upper mold 102 through the pair of lower mold cleaning pipes 201 and the upper mold cleaning pipes 202 to clean the lower mold 101 and the upper mold 102 by blowing air.

[0056] At the same time, when multiple sets of exhaust fans 302 are running, external air can flow back to the dust collecting cylinder 301 along the dust collecting pipe 305 and the negative pressure guide pipe 308, so that the dust collecting pipe 305 is in a negative pressure state during the operation of the exhaust fan 302. The dust collecting pipe 305 in the negative pressure state can collect impurities blown up between the molding lower mold 101 and the molding upper mold 102 under negative pressure, thereby reducing the occurrence of flying impurities and ensuring the paper tray molding quality of the molding machine used for paper tray production.

[0057] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A forming machine for producing paper trays, characterized in that: include: A machine base (1), wherein a lower molding die (101) is fixedly mounted above the machine base (1), an upper molding die (102) is mounted above the lower molding die (101), and the lower molding die (101) and the upper molding die (102) are arranged in coordination; A pneumatic cleaning mechanism (2) is fixedly mounted between the molding lower mold (101) and the molding upper mold (102), the pneumatic cleaning mechanism (2) comprising a pair of lower mold cleaning tubes (201), the pair of lower mold cleaning tubes (201) being symmetrically mounted on both sides of the molding lower mold (101), upper mold cleaning tubes (202) being fixedly mounted above the pair of lower mold cleaning tubes (201), the upper mold cleaning tubes (202) being arranged in coordination with the molding upper mold (102), a plurality of groups of evenly distributed air pressure nozzles (203) being fixedly connected to the corresponding sides of the pair of lower mold cleaning tubes (201) and the upper mold cleaning tubes (202), and a conducting air tube (204) being fixedly connected between the lower mold cleaning tube (201) and the upper mold cleaning tube (202); A negative pressure dust collecting mechanism (3) is fixedly mounted on one side of the machine base (1), the negative pressure dust collecting mechanism (3) comprising a dust collecting cylinder (301), the dust collecting cylinder (301) being fixedly mounted on the side of the machine base (1), a plurality of exhaust fans (302) being fixedly mounted below the dust collecting cylinder (301), a conducting pipe joint (303) being fixedly connected to the bottom of the dust collecting cylinder (301), a conveying air pipe (304) being fixedly connected between the conducting pipe joint (303) and a pair of conducting air pipes (204), a dust collecting pipe (305) being fixedly mounted on one side of the machine base (1) close to the dust collecting cylinder (301), and the dust collecting pipe (305) being arranged between a lower molding die (101) and an upper molding die (102).

2. The paper tray forming machine according to claim 1, characterized in that: An upper die assembly seat (103) is fixedly connected to the upper portion of the molding upper die (102), and a plurality of groups of evenly distributed Green columns (104) are slidably assembled on the outer side of the upper die assembly seat (103), and the plurality of groups of Green columns (104) are fixedly assembled on the upper portion of the machine base (1).

3. The paper tray forming machine according to claim 2, characterized in that: A top plate (105) is fixedly installed on the top of the plurality of groups of Green columns (104), a hydraulic cylinder (106) is fixedly installed above the top plate (105), and a telescopic rod of the hydraulic cylinder (106) is fixedly connected to the upper die assembly seat (103).

4. The paper tray forming machine according to claim 3, characterized in that: Both ends of a pair of lower mold cleaning tubes (201) and upper mold cleaning tubes (202) are fixedly connected to an assembly shaft (205), and the other end of the assembly shaft (205) is rotatably connected to a fixed sleeve plate (206), and the fixed sleeve plate (206) is slidably sleeved on the outer side of the Green column (104).

5. The paper tray production forming machine according to claim 4, characterized in that: One side of each of the plurality of fixed sleeve plates (206) is threadedly connected with a locking bolt member (207), and the locking bolt member (207) is arranged in cooperation with the assembly shaft (205).

6. The paper tray forming machine according to claim 5, characterized in that: A plurality of groups of evenly distributed first telescopic rods (208) are fixedly connected between the fixed sleeve (206) and the upper die assembly seat (103), and a plurality of groups of evenly distributed second telescopic rods (209) are fixedly connected between a pair of fixed sleeves (206) sleeved on the outer side of the Green column (104).

7. The paper tray forming machine according to claim 1, characterized in that: A cylinder cover (306) is fixedly mounted on the top of the dust collecting cylinder (301), and the cylinder cover (306) cooperates with the dust collecting cylinder (301) to form a closed guide cylinder.

8. The paper tray forming machine according to claim 7, characterized in that: A filter screen cylinder (307) is fixedly installed in the dust collecting cylinder (301), the filter screen cylinder (307) is arranged above the multiple groups of exhaust fans (302), and a flow guide gap is formed between the cylinder cover (306) and the dust collecting cylinder (301).

9. The paper tray forming machine according to claim 8, characterized in that: A negative pressure guide pipe (308) is connected between the cylinder cover (306) and the dust collecting pipe (305), and the negative pressure guide pipe (308) is arranged in coordination with the filter cylinder (307).

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