Pulp molding tableware forming cold pressing dehydration without net hot drying two-station integrated machine

Abstract

The invention provides a production equipment for pulp molded bio-based waterproof and oil-proof tableware, a two-station integrated machine for forming cold-pressing dehydration without a net and hot drying, a forming lower mold and a cold-pressing upper mold are relatively arranged at station one, a drying lower mold and a drying upper mold are relatively arranged at station two, and the cold-pressing upper mold is pressurized by physical high-strength dehydration to reduce the moisture content of the formed blank to 55-60%, so as to avoid the product blank with too high moisture content from bursting; the cold-pressing upper mold is molded with the forming lower mold or the drying lower mold, and the drying upper mold is molded with the drying lower mold to absorb the product and convert it to a collection device for stacking and counting. The forming lower mold and the cold-pressing upper mold of the invention realize cold high-pressure dehydration, reduce the moisture content of the product blank, enable the drying lower mold and the drying upper mold to realize hot drying without a net, reduce heat energy consumption, and the two-station integrated machine for pulp molded bio-based waterproof and oil-proof tableware makes the pulp molded tableware meet the international "BPI" standard of fluorine-free, energy-saving and efficient, and reduce the volume of equipment.

Description

Technical Field

[0001] The invention relates to the field of pulp tableware production equipment, in particular to a two-station integrated machine for forming pulp molded tableware by cold pressing, dehydrating, and drying without a net. Background Art

[0002] Pulp molding is a green and environmentally friendly packaging material. It is generally formed by absorption of pulp molds (the moisture content after molding is about 75%). After demolding, wet paper blanks are formed, and the wet paper blanks are then dried, shaped, die-cut and other processes.

[0003] At present, pulp molded tableware has been widely used in society. In the production technology of pulp molded tableware, pulp molding uses semi-automatic production machinery and equipment, but traditional molding equipment is complicated, increases heat energy consumption, and the mold is not easy to disassemble and install. Summary of the invention

[0004] In order to solve the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a two-station integrated machine for forming pulp molded tableware with cold pressing and dehydration without a screen and hot drying, so as to overcome the defects in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a two-station integrated machine for forming pulp molded tableware by cold pressing and dehydrating without a net and hot drying, comprising a forming lower mold, a cold pressing upper mold, a drying lower mold and a drying upper mold; the forming lower mold is mounted on the first station of the frame device, the cold pressing upper mold is mounted on the frame device above the forming lower mold, the drying lower mold is mounted on the second station of the frame device, the drying upper mold is mounted on the frame device above the drying lower mold, and an automatic collecting device is arranged on the frame device on one side of the drying lower mold, and the stations one and two are arranged front and back or left and right according to different machine models; the cold pressing upper mold and the drying upper mold are moved by a linear guide rail moving device, and the cold pressing upper mold moves between the forming lower mold and the drying lower mold, and the drying upper mold moves between the drying lower mold and the automatic collecting device; the forming lower mold is connected to the slurry box and the first The negative pressure device is connected so that the slurry in the slurry box is adsorbed in the forming lower mold to form a wet blank; the cold pressing upper mold is connected to the second negative pressure device, and the cold pressing upper mold moves up and down through the first hydraulic lifting device and is molded with the forming lower mold or the drying lower mold, so that the cold pressing upper mold pressurizes, dries, dehydrates and vacuum adsorbs the wet blank in the forming lower mold and transfers the wet blank to the drying lower mold; the drying lower mold and the drying upper mold are connected to the first heating device and the second heating device respectively, and the drying upper mold is connected to the third negative pressure device, and the drying upper mold moves up and down through the second hydraulic lifting device and is molded with the drying lower mold or stops on the automatic collecting device, so that the drying upper mold and the drying lower mold together perform non-net heat drying on the wet blank in the drying lower mold, and the drying upper mold vacuum adsorbs the dried dry blank and transfers the dry blank to the automatic collecting device for stacking and counting.

[0006] By adopting the above technical scheme, cold pressurized dehydration is achieved through the forming lower mold and the cold pressing upper mold to reduce the moisture content of the product blank, and hot drying without a net is achieved through the drying lower mold and the drying upper mold. The equipment can use fluorine-free oil-proofing agent products for production, reduce energy consumption, increase output, form a two-station integrated machine, and have a compact structure and reduce the size of the equipment.

[0007] As a further explanation of the two-station integrated machine for forming pulp molded tableware with cold pressing and dehydration and hot drying without a net described in the present invention, preferably, the right side of the lower molding mold is connected to the slurry box through a slurry supply pipe, and a slurry supply pump is connected to the slurry supply pipe, and the bottom of the lower molding mold is connected to the slurry box through a slurry return pipe.

[0008] As a further explanation of the two-station integrated machine for forming pulp molded tableware with cold pressing, dehydration and hot drying without a net described in the present invention, preferably, the molding lower mold is detachably mounted on the frame device, and the middle part of the molding lower mold has a molding lower mold core, and the molding lower mold core is provided with a molding filter, a suction filter layer, a negative pressure layer and a pulp discharge layer from the outside to the inside in sequence; wherein, the pulp supply pipe is laid at the opening of the molding lower mold core, and a first through hole is provided at the bottom of the suction filter layer to connect the molding filter with the negative pressure layer, and the side of the negative pressure layer is connected to the first negative pressure device through the first air duct, and the bottom middle of the pulp discharge layer is connected to the negative pressure layer and the pulp return pipe, and a switch valve is provided on the pulp return pipe.

[0009] By adopting the above technical scheme, the pulp is first pumped into the mold cavity of the lower molding core through the pulp supply pipe, and the switch valve is closed to form a closed cavity with the negative pressure layer, the pulp discharge layer and a part of the pulp return pipe. The first negative pressure device is started to form a wet blank on the molding filter under the action of gravity and negative pressure, and is dehydrated through the first through hole of the suction filter layer, and then enters the pulp return pipe through the negative pressure layer. The switch valve is opened to dehydrate the pulp from another part of the pulp return pipe to the pulp box, which is convenient for uniform molding and also convenient for controlling the time of one molding.

[0010] As a further explanation of the two-station integrated machine for cold pressing and dehydrating pulp molded tableware forming without a net and hot drying described in the present invention, preferably, the bottom of the cold pressing upper mold is connected to a detachable cold pressing upper mold core, and the cold pressing upper mold core is provided with a first adsorption layer and a dehydration layer in sequence from the outside to the inside; wherein, a second through hole is provided on the first adsorption layer to connect the first adsorption layer with the dehydration layer, one side of the dehydration layer is connected to the gas-water separator through the second air duct, and the gas-water separator is respectively connected to the second negative pressure device and the liquid storage tank.

[0011] By adopting the above technical scheme, the cold pressing upper mold realizes adsorption of wet blanks and cold pressing dehydration through the first adsorption layer and the dehydration layer, and the first adsorption layer creates a negative pressure environment and dehydrates the wet blanks through the second air channel. The moisture in the wet blanks is moved to the liquid storage tank through the air-water separator to avoid water entering the second negative pressure device during cold pressing dehydration.

[0012] As a further explanation of the two-station integrated machine for cold-pressing and dehydrating pulp molded tableware without a net and hot drying described in the present invention, preferably, the drying lower mold is detachably mounted on the frame device, and the middle part of the drying lower mold is provided with a drying lower mold core, and the drying lower mold core is provided with a first heating layer and an evaporation layer in sequence from the outside to the inside; wherein, the first heating layer is provided with a through hole to connect the mold cavity of the drying lower mold core with the evaporation layer, the first heating layer is connected to the lower magnetic suction joint through a heating wire, and the lower magnetic suction joint is connected to the first heating device through a heating wire.

[0013] By adopting the above technical solution, the first heating layer of the drying lower mold is connected to the first heating device through a magnetic suction joint, which makes it easy to replace the drying lower mold and can be suitable for the production of pulp tableware of different shapes.

[0014] As a further explanation of the two-station integrated machine for cold pressing and dehydrating pulp molded tableware forming without a net and hot drying described in the present invention, preferably, a detachable drying upper mold core is connected to the bottom of the drying upper mold, and the drying upper mold core is provided with a second adsorption layer, a second heating layer and a heat dissipation layer from the outside to the inside, and a third air duct is arranged through the adsorption layer, the drying upper mold core and the drying upper mold, and the third air duct forms an air duct interface at the top of the drying upper mold, and the air duct interface is connected to the third negative pressure device through a hose, and the second heating layer is connected to the upper magnetic suction joint through a heating wire, and the upper magnetic suction joint is connected to the second heating device through a heating wire.

[0015] By adopting the above technical solution, the drying upper mold connects the second heating layer to the second heating device through a magnetic suction joint, which makes it easy to replace the drying upper mold and can be suitable for the production of pulp tableware of different shapes.

[0016] As a further description of the two-station integrated machine for forming pulp molded tableware by cold pressing and dehydrating without a net and hot drying according to the present invention, preferably, the first hydraulic lifting device and the second hydraulic lifting device are hydraulic cylinders.

[0017] As a further description of the two-station integrated machine for forming pulp molded tableware by cold pressing and dehydrating without a net and hot drying described in the present invention, preferably, the first negative pressure device, the second negative pressure device and the third negative pressure device are vacuum pumps.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention realizes cold high-pressure dehydration through the molding lower mold and the cold pressing upper mold, and the cold pressing upper mold is pressurized for physical high-strength dehydration, so that the moisture content of the molded blank is reduced to 55-60%, and the moisture content of the product blank is reduced, so that the drying lower mold and the drying upper mold can achieve hot drying without a net, reduce energy consumption, and increase production, forming a two-station integrated machine, which is energy-saving and efficient, compact in structure, and reduces the size of the equipment, and is specially used for the production of bio-based oil-proof agent pulp molded catering utensils;

[0020] 2. The forming lower mold and the drying lower mold of the present invention are detachably connected to the frame device. If the cold pressing upper mold and the drying upper mold need to be moved left and right and up and down, a detachable cold pressing upper mold core and a drying upper mold core are provided, so that the forming lower mold and the drying lower mold and the cold pressing upper mold core and the drying upper mold core can be conveniently replaced, and the production of pulp tableware of different shapes can be applied;

[0021] 3. In the present invention, a heating layer is arranged inside the drying upper mold and the drying lower mold, and the heating layer is connected to the heating device through a magnetic suction joint. When the drying upper mold and the drying lower mold are replaced, the wiring between the heating layer and the heating device will not be affected, thereby reducing external wiring and increasing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the cold-pressing, dehydrating, non-netting, hot-drying two-station integrated machine for forming pulp molded tableware of the present invention;

[0023] Figure 2 for Figure 1 A top view of

[0024] Figure 3 for Figure 1 Enlarged view of middle C;

[0025] Figure 4 for Figure 1 Enlarged view of middle D;

[0026] Figure 5 for Figure 1 Enlarged view of E in the middle;

[0027] Figure 6 It is a cross-sectional view of the cold pressing upper mold 2 of the present invention. DETAILED DESCRIPTION

[0028] In order to further understand the structure, features and other purposes of the present invention, the preferred embodiments are described in detail with reference to the accompanying drawings as follows. The embodiments described in the drawings are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention.

[0029] like Figure 1 and Figure 2As shown, a two-station integrated machine for forming pulp molded tableware with cold pressing, dehydration and hot drying without a net comprises a forming lower mold 1, a cold pressing upper mold 2, a drying lower mold 3 and a drying upper mold 4; the forming lower mold 1 is mounted at station 1 A of a rack device 5, the cold pressing upper mold 2 is mounted on the rack device 5 above the forming lower mold 1, the drying lower mold 3 is mounted at station 2 B of the rack device 5, the drying upper mold 4 is mounted on the rack device 5 above the drying lower mold 3, and an automatic collecting device 6 is arranged on the rack device 5 on one side of the drying lower mold 3; the cold pressing upper mold 2 and the drying upper mold 4 are moved by a linear guide moving device 7, and the two linear guides are connected to the inner of the rack device 5. The cold pressing upper mold 2 and the drying upper mold 4 are connected to the side and move along the frame device 5. Two I-shaped fixed plates 71 are connected between the two linear guide rails. The first hydraulic lifting device 11 and the second hydraulic lifting device 14 are respectively installed on the two I-shaped fixed plates 71. The first hydraulic lifting device 11 and the second hydraulic lifting device 14 are hydraulic cylinders. The telescopic rods of the first hydraulic lifting device 11 and the second hydraulic lifting device 14 are respectively connected to the cold pressing upper mold 2 and the drying upper mold 4. Slide rods are connected at the four corners of the cold pressing upper mold 2 and the drying upper mold 4. The cold pressing upper mold 2 moves between the forming lower mold 1 and the drying lower mold 3, and the drying upper mold 4 moves between the drying lower mold 3 and the automatic collecting device 6.

[0030] The forming lower mold 1 is connected with the slurry box 8 and the first negative pressure device 9, so that the slurry in the slurry box 8 is adsorbed in the forming lower mold 1 to form a wet blank; the cold pressing upper mold 2 is connected with the second negative pressure device 10, and the cold pressing upper mold 2 moves up and down through the first hydraulic lifting device 11 and is molded with the forming lower mold 1 or the drying lower mold 3, so that the cold pressing upper mold 2 pressurizes, dries, dehydrates and vacuum adsorbs the wet blank in the forming lower mold 1 and transfers the wet blank to the drying lower mold 3; the drying lower mold 3 and the drying upper mold 4 are respectively connected with the first heating device 12 and the second heating device 12', the drying upper mold 4 is connected with the third negative pressure device 13, the drying upper mold 4 moves up and down through the second hydraulic lifting device 14 and is molded with the drying lower mold 3 or stops on the automatic collecting device 6, so that the drying upper mold 4 and the drying lower mold 3 together perform non-net heat drying on the wet blank in the drying lower mold 3, the drying upper mold 4 vacuum adsorbs the dried dry blank and transfers the dry blank to the automatic collecting device 6 for stacking and counting. The first negative pressure device 9 , the second negative pressure device 10 and the third negative pressure device 13 are vacuum pumps.

[0031] Please see Figure 1 and Figure 3The lower molding die 1 is detachably mounted on the frame device 5. The right side of the lower molding die 1 is connected to the slurry box 8 through a slurry supply pipe 101. The slurry supply pipe 101 is connected to a slurry supply pump 102. The bottom of the lower molding die 1 is connected to the slurry box 8 through a slurry return pipe 103. The middle of the lower molding die 1 has a lower molding die core 104. The lower molding die core 104 is provided with a molding filter screen 105, a suction filter layer 106, a negative pressure layer 104 from the outside to the inside. 7 and a slurry discharge layer 108; wherein, a slurry supply pipe 101 is laid at the opening of the molding lower mold core 104, a first through hole 109 is provided at the bottom of the suction filter layer 106 to connect the molding filter 105 with the negative pressure layer 107, the side of the negative pressure layer 107 is connected to the first negative pressure device 9 through a first air duct 110, and the middle of the bottom of the slurry discharge layer 108 is connected to the negative pressure layer 107 and the return slurry pipe 103, and a switch valve 111 is provided on the return slurry pipe 103.

[0032] The pulp is pumped into the mold cavity of the lower mold core 104 by the pulp supply pipe 101, and the switch valve 111 is closed, so that the negative pressure layer 107, the pulp discharge layer 108 and a part of the pulp return pipe 103 form a closed cavity, and the first negative pressure device 9 is started, so that the pulp forms a wet blank on the forming filter 105 under the action of gravity and negative pressure, and is dehydrated by the first through hole 109 of the suction filter layer 106, and then enters the pulp return pipe 103 from the negative pressure layer 107, and the switch valve 111 is opened and closed, and is dehydrated from another part of the pulp return pipe 103 to the pulp box 8. The first through hole 109 is set at the bottom of the suction filter layer 106, and the first air channel 110 is set on the side of the negative pressure layer 107, which not only ensures that the negative pressure environment is realized through the negative pressure layer 107, but also prevents the pulp from entering the first air channel 110.

[0033] Please see Figure 1 , Figure 2 , Figure 3 and Figure 6 The bottom of the cold pressing upper mold 2 is connected with a detachable cold pressing upper mold core 201, and the cold pressing upper mold core 201 is connected to the cold pressing upper mold 2 through a pin shaft 209. The cold pressing upper mold core 201 is provided with a first adsorption layer 202 and a dehydration layer 203 from the outside to the inside; wherein, a second through hole 204 is provided on the first adsorption layer 202 to connect the first adsorption layer 202 with the dehydration layer 203, and one side of the dehydration layer 203 is connected with the gas-water separator 206 through the second air channel 205, and the gas-water separator 206 is respectively connected with the second negative pressure device 10 and the liquid storage tank 207.

[0034] Since the slurry supply pipe 101 is laid at the opening of the molding lower mold core 104, a accommodating cavity 208 is provided on the cold pressing upper mold 2. When the cold pressing upper mold core 201 descends and closes with the molding lower mold core 104, the slurry supply pipe 101 on the surface of the molding lower mold core 104 is accommodated in the accommodating cavity 208, and the pipe mouth of the slurry supply pipe 101 is attached to the side of the cold pressing upper mold core 201 to block the pipe mouth of the slurry supply pipe 101, and the second negative pressure device 10 is started, and the first adsorption layer 202 adsorbs the wet blank in the mold cavity of the molding lower mold core 104. At the same time, a negative pressure environment is formed in the second air channel 205, and the moisture in the wet blank is continued to be dehydrated into the air-water separator 206, and the water moves to the liquid storage tank 207 to avoid water entering the second negative pressure device 10 during cold pressing dehydration.

[0035] Please see Figure 1 and Figure 4 The drying lower mold 3 is detachably mounted on the frame device 5, and a drying lower mold core 301 is provided in the middle of the drying lower mold 3. The drying lower mold core 301 is provided with a first heating layer 302 and an evaporation layer 303 from the outside to the inside; wherein, a through hole is provided on the first heating layer 302 to connect the mold cavity of the drying lower mold core 301 with the evaporation layer 303, the first heating layer 302 is connected to the lower magnetic suction joint 304 through a heating wire, and the lower magnetic suction joint 304 is connected to the first heating device 12 through a heating wire.

[0036] A part of the lower magnetic joint 304 is fixedly connected to the frame device 5 and connected to the first heating device 12. Another part of the lower magnetic joint 304 is built into the bottom of the drying lower mold 3. When the drying lower mold 3 is fixed on the frame device 5, the lower magnetic joint 304 is attracted. When the drying lower mold 3 is cast, the heating wire is pre-set in the drying lower mold 3, and the evaporation layer 303 and the first heating layer 302 are hot-inserted on the drying lower mold 3 so that the heating wire is connected to the first heating layer 302. The heating wire is wrapped with a waterproof and heat-proof layer. The evaporation layer 303 is a cavity. Some through holes are arranged on the first heating layer 302. On the one hand, when the wet blank is heat-dried, moisture enters the evaporation layer 303 to evaporate. On the other hand, the first heating layer 302 is prevented from directly contacting the drying lower mold 3.

[0037] Please see Figure 1 , Figure 2 and Figure 5The bottom of the drying upper mold 4 is connected to a detachable drying upper mold core 401, and the drying upper mold core 401 is provided with a second adsorption layer 402, a second heating layer 403 and a heat dissipation layer 404 from the outside to the inside. The adsorption layer 402, the drying upper mold core 401 and the drying upper mold 4 are penetrated by a third air duct 405, and the third air duct 405 forms an air duct interface 406 at the top of the drying upper mold 4, and the air duct interface 406 is connected to the third negative pressure device 13 through a hose, and the second heating layer 403 is connected to the upper magnetic suction joint 407 through a heating wire, and the upper magnetic suction joint 407 is connected to the second heating device 12' through a heating wire.

[0038] A part of the upper magnetic joint 407 is built into the drying upper mold 4, and the other part of the upper magnetic joint 407 is built into the drying upper mold core 401. When the drying upper mold core 401 is installed on the drying upper mold 4, the upper magnetic joint 407 is attracted. When the drying upper mold core 401 is molded, a section of heating wire is pre-set in the drying upper mold core 401 and connected to the upper magnetic joint 407 and the second heating layer 403. When the drying upper mold 4 is molded, a section of heating wire is also pre-set in the drying upper mold 4 and connected to the upper magnetic joint 407 and the second heating device 12'. The second heating device 12' is installed on the top of the drying upper mold 4, so that the heating wire is not affected when the drying upper mold 4 moves up and down.

[0039] Similarly, the third air channel 405 is also relatively preset in the drying upper mold core 401 and the drying upper mold 4, so that the air channel interface 406 on the top of the drying upper mold 4 is used to connect the hose of the third negative pressure device 13, and the third negative pressure device 13 is also installed on the top of the drying upper mold 4. When the drying upper mold 4 moves up and down, it does not affect the connection between the third negative pressure device 13 and the air channel interface 406. The heat dissipation layer 404 is also a cavity, and some through holes are set on the second heating layer 403. On the one hand, when the wet blank is heat-dried, the moisture enters the heat dissipation layer 404 to evaporate, and on the other hand, the second heating layer 403 is prevented from directly contacting the drying upper mold 4.

[0040] When the drying upper mold 4 is closed with the drying lower mold 3, the third negative pressure device 13 is started, and a negative pressure environment is formed in the adsorption layer 402 to adsorb the wet blank in the drying lower mold 3. At the same time, the first heating device 12 and the second heating device 12' are started to make the first heating layer 302 and the second heating layer 403 generate heat, and both sides of the wet blank are thermally dried at the same time.

[0041] It should be noted that the above invention content and specific implementation methods are intended to demonstrate the practical application of the technical solution provided by the present invention and should not be interpreted as limiting the scope of protection of the present invention. Those skilled in the art can make various modifications, equivalent substitutions or improvements within the spirit and principles of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A two-station integrated machine for forming pulp molded tableware by cold pressing and dehydrating without a net and hot drying, comprising a forming lower mold (1), a cold pressing upper mold (2), a drying lower mold (3) and a drying upper mold (4); characterized in that: The molding lower mold (1) is mounted on the first station (A) of the frame device (5), the cold pressing upper mold (2) is mounted on the frame device (5) above the molding lower mold (1), the drying lower mold (3) is mounted on the second station (B) of the frame device (5), the drying upper mold (4) is mounted on the frame device (5) above the drying lower mold (3), and an automatic collecting device (6) is arranged on the frame device (5) on one side of the drying lower mold (3); The cold pressing upper mold (2) and the drying upper mold (4) are moved by a linear guide rail moving device (7), and the cold pressing upper mold (2) is moved between the forming lower mold (1) and the drying lower mold (3), and the drying upper mold (4) is moved between the drying lower mold (3) and the automatic collecting device (6); The lower forming mold (1) is connected to the slurry box (8) and the first negative pressure device (9), so that the slurry in the slurry box (8) is adsorbed in the lower forming mold (1) to form a wet blank; The cold pressing upper mold (2) is connected to the second negative pressure device (10), and the cold pressing upper mold (2) moves up and down through the first hydraulic lifting device (11) and is molded with the forming lower mold (1) or the drying lower mold (3), so that the cold pressing upper mold (2) pressurizes, dries, dehydrates and vacuum-absorbs the wet blank in the forming lower mold (1) and transfers the wet blank to the drying lower mold (3); The drying lower mold (3) and the drying upper mold (4) are connected to the first heating device (12) and the second heating device (12') respectively, and the drying upper mold (4) is connected to the third negative pressure device (13). The drying upper mold (4) moves up and down through the second hydraulic lifting device (14) and is molded with the drying lower mold (3) or stops on the automatic collecting device (6), so that the drying upper mold (4) and the drying lower mold (3) can perform non-net heat drying on the wet blank in the drying lower mold (3), and the drying upper mold (4) vacuum absorbs the dried blank and transfers the dried blank to the automatic collecting device (6) for stacking and counting; The right side of the lower molding die (1) is connected to the slurry box (8) through a slurry supply pipe (101), the slurry supply pipe (101) is connected to a slurry supply pump (102), and the bottom of the lower molding die (1) is connected to the slurry box (8) through a slurry return pipe (103); the lower molding die (1) is detachably mounted on the frame device (5), the middle part of the lower molding die (1) is provided with a lower molding die core (104), and the lower molding die core (104) is provided with a molding filter screen (105), a suction filter layer (106), a negative pressure layer (107) in sequence from the outside to the inside. ) and a pulp discharge layer (108); wherein the pulp supply pipe (101) is laid at the opening of the lower forming mold core (104), the bottom of the suction filter layer (106) is provided with a first through hole (109) to allow the forming filter screen (105) to communicate with the negative pressure layer (107), the side of the negative pressure layer (107) is connected to the first negative pressure device (9) through a first air channel (110), the middle of the bottom of the pulp discharge layer (108) is connected to the negative pressure layer (107) and the pulp return pipe (103), and the pulp return pipe (103) is provided with a switch valve (111); The bottom of the cold pressing upper mold (2) is connected to a detachable cold pressing upper mold core (201), and the cold pressing upper mold core (201) is provided with a first adsorption layer (202) and a dehydration layer (203) in sequence from the outside to the inside; wherein the first adsorption layer (202) is provided with a second through hole (204) to enable the first adsorption layer (202) to communicate with the dehydration layer (203), and one side of the dehydration layer (203) is connected to a gas-water separator (206) through a second air channel (205), and the gas-water separator (206) is respectively connected to a second negative pressure device (10) and a liquid storage tank (207); A receiving cavity (208) is provided on the cold pressing upper mold (2). When the cold pressing upper mold core (201) descends and closes with the molding lower mold core (104), the slurry supply pipe (101) on the surface of the molding lower mold core (104) is received in the receiving cavity (208), and the pipe mouth of the slurry supply pipe (101) is attached to the side of the cold pressing upper mold core (201), blocking the pipe mouth of the slurry supply pipe (101). The second negative pressure device (10) is started, and the first adsorption layer (202) adsorbs the wet blank in the mold cavity of the molding lower mold core (104). At the same time, a negative pressure environment is formed in the second air channel (205), and the moisture in the wet blank is continuously dehydrated into the air-water separator (206). The water moves to the liquid storage tank (207) to prevent water from entering the second negative pressure device (10) during cold pressing dehydration.

2. The cold-pressing, dehydrating and non-netting hot-drying two-station integrated machine for forming pulp molded tableware as claimed in claim 1, characterized in that: The drying lower mold (3) is detachably mounted on the frame device (5); the middle part of the drying lower mold (3) is provided with a drying lower mold core (301); the drying lower mold core (301) is provided with a first heating layer (302) and an evaporation layer (303) in sequence from the outside to the inside; wherein the first heating layer (302) is provided with a through hole to connect the mold cavity of the drying lower mold core (301) with the evaporation layer (303); the first heating layer (302) is connected to the lower magnetic attraction joint (304) via a heating wire; and the lower magnetic attraction joint (304) is connected to the first heating device (12) via a heating wire.

3. The cold-pressing, dehydrating and non-netting hot-drying two-station integrated machine for forming pulp molded tableware as claimed in claim 2, characterized in that: The bottom of the drying upper mold (4) is connected to a detachable drying upper mold core (401), and the drying upper mold core (401) is provided with a second adsorption layer (402), a second heating layer (403) and a heat dissipation layer (404) in sequence from the outside to the inside. The second adsorption layer (402), the drying upper mold core (401) and the drying upper mold (4) are penetrated by a third air duct (405), and the third air duct (405) forms an air duct interface (406) at the top of the drying upper mold (4), and the air duct interface (406) is connected to the third negative pressure device (13) through a hose, and the second heating layer (403) is connected to the upper magnetic suction joint (407) through a heating wire, and the upper magnetic suction joint (407) is connected to the second heating device (12') through a heating wire.

4. The cold-pressing, dehydrating and non-netting hot-drying two-station integrated machine for forming pulp molded tableware as claimed in claim 1, characterized in that: The first hydraulic lifting device (11) and the second hydraulic lifting device (14) are hydraulic cylinders.

5. The cold-pressing, dehydrating and non-netting hot-drying two-station integrated machine for forming pulp molded tableware as claimed in claim 1, characterized in that: First negative pressure device (9) 、 The second negative pressure device (10) and the third negative pressure device (13) are vacuum pumps.

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