Molded pulp drying and forming equipment

Abstract

The utility model provides paper pulp molding drying forming equipment which comprises a microwave drying forming part, a suction filtration forming part and a cooling circulation system, because the heat conduction direction of microwave drying is the same as the transfer direction of water vapor, and the temperature is increased together inside and outside, based on the drying characteristic that microwaves can enable water molecules to be polarized, the water molecules can be cooled. Therefore, the higher the water content is, the higher the temperature is, the higher the drying rate is, the material can be heated more uniformly, and the production cycle can be greatly shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to a paper pulp molding drying forming equipment and belongs to the technical field of paper pulp molding drying. BACKGROUND

[0002] Chinese patent CN205000197U discloses a microwave drying forming device for wet paper pulp molding process, including upper fixed mould, lower fixed mould, upper mould, lower mould, microwave generator and wet blank etc. structure constitutes. The wet embryo is located between the upper mould and the lower mould, the microwave generator is arranged in the upper mould and / or the lower mould, the microwave is emitted to the inside of the upper mould and the lower mould, the water molecules contained in the wet embryo are vibrated and frictional heat is generated, and then the wet embryo is dried and formed to obtain a wet paper pulp molding product, and it is proved by experiments that the microwave drying technology can effectively improve the paper pulp molding production efficiency. However, the microwave drying forming device for wet paper pulp molding process in the above technical scheme and the actual application of microwave drying technology in paper pulp molding production still have a certain distance;

[0003] The drying process of paper pulp molding products can be considered as a continuous dehydration process, which mainly consists of two parts of pulp absorption dehydration and hot pressing dehydration. The hot pressing dehydration process is the core part of the whole paper pulp molding product process flow. The traditional hot forming mold utilizes the heat generated by the heating rod in the lower heating plate when electrified, and the heat is sequentially transmitted to the heating plate, the mold base, the mold core and finally to the upper surface of the mold for drying of the paper pulp molding product by heat conduction. The traditional hot forming mold has the problems of slow mold temperature rising rate due to long heat transfer distance (at least 45mm), uneven mold surface temperature distribution due to uneven heat transfer distance, and serious heat loss caused by factors such as heat conduction, convection and radiation between the mold heating system and the air and base, which seriously affect the production energy consumption and efficiency of paper pulp molding products. Therefore, it is necessary to seek a more efficient paper pulp molding heating method and equipment to promote the development of paper pulp molding industry. Therefore, there is an urgent need for a paper pulp molding drying forming equipment to solve the above problems. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a paper pulp molding drying forming equipment to solve the problems raised in the background art.

[0005] The utility model realizes the following technical scheme: a paper pulp molding drying forming equipment, comprising: a microwave drying forming part, a sliding table and a cooling circulation system, characterized in that: the microwave drying forming part and the sliding table are arranged between the upper shell and the lower shell, and the cooling circulation system is arranged at the top end of the upper shell.

[0006] The lower end of the microwave drying forming part is provided with a group of sliding tables for providing mobile support to the lower end thereof, and the upper end of the pulp microwave drying forming part is provided with a group of microwave drying end hydraulic systems for providing hydraulic pressure to the inside thereof and is arranged at the center position of the upper shell, and the cooling circulation system is arranged around the transfer part hydraulic system and has a direct cooling relationship with the microwave drying forming part.

[0007] The microwave drying forming part comprises, from bottom to top, a hot-pressing lower mold base, a hot-pressing lower mold fixed plate, a microwave hot-pressing lower mold, a microwave hot-pressing upper mold, a waveguide plate, a microwave heating system, a lifting fixed plate, and a microwave drying end hydraulic system according to the operation mode.

[0008] As a preferred embodiment, the microwave heating system comprises a protective isolation cover and a microwave emission system, the protective isolation cover is an iron frame, the inside of the iron frame is provided with horizontally and vertically welded isolation plates and uniformly divides the entire protective isolation cover into regions for independent and distributed installation of the microwave emission system.

[0009] The isolation plates are uniformly distributed with a plurality of groups of rectangular holes of the same size and specification for realizing the intercommunication between the regions, and provide channels for the interconnection of the internal circuit of the microwave emission system, the cooling water pipe of the heat exchanger, and the hot water pipe of the heat exchanger in the later stage, and the top end cover surface of the protective isolation cover is uniformly distributed with a circular microwave emission port for arranging an antenna.

[0010] As a preferred embodiment, the microwave emission system comprises a heat exchanger cooling water pipe, a heat exchanger hot water pipe, a heat exchanger, a filter power supply, a magnetron, and an antenna, the magnetron is an electric vacuum device for generating microwave energy, the electrons in the tube interact with high-frequency electromagnetic fields under the control of mutually perpendicular constant magnetic fields and constant electric fields, and the energy in the constant electric field provided by the filter power supply is converted into microwave energy, the heat exchanger is used for absorbing the heat generated during the operation of the magnetron, and the heat exchanger cooling water pipe and the heat exchanger hot water pipe arranged on the side of the heat exchanger are used for realizing the circulation of the cooling medium in the heat exchanger.

[0011] As a preferred embodiment, the waveguide plate is a cuboid aluminum plate, the front surface is in contact with the protective isolation cover, and the back surface is in contact with the bottom surface of the microwave hot pressing upper mold. The waveguide plate is internally provided with a group of waveguide channels for conducting microwaves, i.e. the microwaves generated by the microwave emission system are guided into the microwave hot pressing upper mold along a certain route. The contact surface of the waveguide plate and the protective isolation cover is uniformly distributed with a rectangular microwave receiving hole. The contact surface of the waveguide plate and the microwave hot pressing upper mold is centrally provided with a rectangular microwave release hole. The two sides of the contact surface and the non-contact position are respectively provided with a circular microwave release hole. A total of four holes are used to connect the microwave hot pressing upper mold. The microwave receiving hole and the microwave release hole in the waveguide plate are one-to-one corresponding through the waveguide channel, thereby realizing the function of uniform and directional waveguide.

[0012] As a preferred embodiment, the microwave hot pressing upper mold is composed of a front support shell, a mold core support shell, a rear support shell, and a mold core. The materials of the front support shell, the mold core support shell, and the rear support shell are aluminum, and the material of the mold core is polytetrafluoroethylene. The front support shell and the rear support shell have the same structure and are similar to the structure of a conventional hot pressing upper mold. A guide column groove is provided in the center of the support shell for installing a guide column, and a screw groove is provided on both sides of the guide column groove.

[0013] As a preferred embodiment, long screws are used to fix the microwave hot pressing upper mold to the upper end of the waveguide plate. A group of waveguide channels are equally distributed on the side surfaces of the front support shell and the rear support shell, and are connected to the circular microwave release holes of the waveguide plate through waveguide tubes, thereby improving the uniformity of microwave distribution in the mold during drying. A group of threaded holes are provided on the side surfaces of the front support shell and the rear support shell for arranging side wall fastening screws to realize the connection between the front support shell, the rear support shell, and the mold core support shell. The mold core support shell is a rectangular groove structure composed of a side wall and a bottom plate.

[0014] The left and right side walls of the mold core support shell are similar to the front support shell and the rear support shell, and are used for positioning and fixing the mold. A guide column groove is provided in the center of the left and right side walls for installing a guide column, and a screw groove is provided on both sides of the guide column groove. Long screws are used to fix the microwave hot pressing upper mold to the waveguide plate. Waveguide grooves are provided on the front and rear side walls of the mold core support shell, and a transmission window is uniformly distributed at the bottom of each waveguide groove. The positions of the transmission windows correspond one-to-one to the group of waveguide channels in the front support shell and the rear support shell. A transmission window is provided on the bottom plate of the mold core support shell, and the position of the transmission window corresponds one-to-one to the rectangular microwave release hole provided in the middle of the waveguide plate. The microwave drying end hydraulic system is composed of a group of hydraulic cylinders and a guide column, and is fixed to the center position of the upper shell through fastening screws. The lifting fixing plate is connected to the hydraulic cylinder piston rod and the guide column of the microwave drying end hydraulic system through threaded flanges and fastening screws.

[0015] As a preferred embodiment, the microwave hot-pressing upper mold, waveguide plate and microwave heating system are sequentially mounted on the lifting fixed plate through screws, the piston rod is used to realize the movement of the microwave hot-pressing upper mold, waveguide plate and microwave heating system in the vertical direction, and the guide column is used to realize the horizontal positioning of the microwave hot-pressing upper mold, waveguide plate and microwave heating system.

[0016] The hot-pressing lower mold base is a cuboid cast iron box, the inside of the box is hollowed out and provided with a support beam for strengthening the support force of the working surface of the box, and the side wall of the box is provided with reinforcing ribs for strengthening the support force of the working surface.

[0017] As a preferred embodiment, the vacuum pipe joint is used to connect the vacuum suction system and provide vacuum suction force for the microwave hot-pressing lower mold during operation, and the cooling water drainage pipe is used to connect the sewage tank and discharge water vapor in the hot-pressing lower mold during operation under the vacuum suction system.

[0018] The working surface of the hot-pressing lower mold base is provided with vacuum holes and threaded holes, which are used to connect the vacuum holes and threaded holes in the hot-pressing lower mold fixed plate and microwave hot-pressing lower mold respectively, and are also used for the communication of the vacuum air suction system and the fastening of the microwave hot-pressing lower mold.

[0019] After the above technical scheme is adopted, the beneficial effects of the present application are as follows: by opening the microwave heating system, the microwaves generated by the microwave heating system enter the microwave metal cavity formed by the microwave hot-pressing lower mold and the microwave hot-pressing upper mold through the waveguide plate, waveguide channel, waveguide pipe and transmission window, and dry and secondary shape the preliminary shaped wet paper blank.

[0020] By using the air pipe, a large amount of air is injected into the pipe and is discharged into the pulp pool through the small holes uniformly distributed on the surface of the pipe to cause the paper pulp to boil and promote the uniform mixing of the pulp, thereby ensuring the stability of the production of the full-automatic fine paper pulp molding microwave drying forming equipment.

[0021] Compared with the prior art, the utility model has the beneficial effects that the wave heat source can be opened and closed according to actual demand, and the traditional electric heating mode needs to open the heat source all the time to guarantee that the mould is in high temperature state, the heat conduction direction and the water vapour transmission direction are opposite, this leads to that paper plastic product outside is dry first, under humidity and temperature gradient, internal moisture diffuses to the surface and then dry, so lead to the slower the drying speed, and the place with high moisture content is slow, the heat conduction direction and the water vapour transmission direction of microwave drying are same, and inside and outside heat together, based on the drying characteristic that microwave can make water molecule polarized, this will lead to that the place with higher moisture content is higher in temperature, and the drying rate is also faster, can heat the material more evenly, and can greatly shorten the production cycle. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other drawings according to these drawings.

[0023] Figure 1 It is the equipment structure schematic diagram of a kind of paper pulp moulding dry forming equipment of the utility model;

[0024] Figure 2 It is the main view of suction filter forming part in a kind of paper pulp moulding dry forming equipment of the utility model;

[0025] Figure 3 It is the left view of suction filter forming part in a kind of paper pulp moulding dry forming equipment of the utility model;

[0026] Figure 4 It is the main view of microwave drying forming part in a kind of paper pulp moulding dry forming equipment of the utility model;

[0027] Figure 5 It is the left view of microwave drying forming part in a kind of paper pulp moulding dry forming equipment of the utility model;

[0028] Figure 6 It is the main view of paper pulp moulding transfer part in a kind of paper pulp moulding dry forming equipment of the utility model;

[0029] Figure 7 It is the structure schematic diagram of cooling circulation system in a kind of paper pulp moulding dry forming equipment of the utility model;

[0030] Figure 8 It is radiator schematic diagram of cooling circulation system in a kind of paper pulp moulding dry forming equipment of the utility model;

[0031] Figure 9 The utility model discares a paper pulp moulding dry forming equipment slip table plan of paper pulp moulding dry forming equipment in the paper pulp moulding dry forming equipment;

[0032] Figure 10 The utility model discares a paper pulp moulding dry forming equipment slip table bottom view of paper pulp moulding dry forming equipment in the paper pulp moulding dry forming equipment;

[0033] Figure 11 The utility model discares a microwave hot-pressing lower mould, microwave hot-pressing upper mould, waveguide plate and microwave heating system assembly drawing in the paper pulp moulding dry forming equipment of the paper pulp moulding dry forming equipment;

[0034] Figure 12 The utility model discares a microwave heating system structure schematic view in the paper pulp moulding dry forming equipment of the paper pulp moulding dry forming equipment;

[0035] Figure 13 The utility model discares a microwave heating system structure schematic view in the paper pulp moulding dry forming equipment of the paper pulp moulding dry forming equipment;

[0036] Figure 14 The utility model discares a waveguide plate structure schematic view in the paper pulp moulding dry forming equipment of the paper pulp moulding dry forming equipment;

[0037] Figure 15 The utility model discares a microwave hot-pressing upper mould structure plan of paper pulp moulding dry forming equipment in the paper pulp moulding dry forming equipment;

[0038] Figure 16 The utility model discares a microwave hot-pressing upper mould structure front view of paper pulp moulding dry forming equipment in the paper pulp moulding dry forming equipment;

[0039] Figure 17 The utility model discares a microwave hot-pressing upper mould structure left section view of paper pulp moulding dry forming equipment in the paper pulp moulding dry forming equipment;

[0040] Figure 18 The utility model discares a microwave hot-pressing upper mould structure main section view of paper pulp moulding dry forming equipment in the paper pulp moulding dry forming equipment;

[0041] In the figure: 1 - upper shell, 2 - suction filtration forming part hydraulic system, 3 - microwave drying forming part hydraulic system, 4 - transfer part hydraulic system, 5 - cooling circulation system, 6 - pulp molding transfer part, 7 - sliding table, 8 - lower shell, 9 - microwave drying forming part, 11 - suction filtration forming part, 12 - extrusion mold mounting plate, 13 - support column, 14 - extrusion mold, 15 - suction pulp mold, 16 - vacuum rotary triangular support, 17 - vacuum filter pipe, 19 - pulp tank, 20 - air pipe, 21 - piston rod, 22 - lifting plate, 23 - rotary motor, 24 - suction pulp mold fixing plate, 25 - guide column, 26 - coupling, 27 - extension plate, 28 - pulp pool, 29 - backflow tank, 31 - hollow shaft, 32 - steel pipe, 33 - liftable fixing plate, 34 - microwave heating system, 35 - waveguide plate, 36 - microwave hot-pressing upper mold, 37 - guide rail, 39 - sliding block, 40 - cooling water drainage pipe, 41 - transfer plate, 42 - mold base, 43 - hot-pressing lower mold fixing plate, 44 - microwave hot-pressing lower mold, 45 - microwave emission port, 46 - heat exchanger cold water pipe, 47 - heat exchanger hot water pipe, 48 - transfer mold, 49 - cold water inlet pipe, 50 - hot water outlet pipe, 51 - cold water tank, 52 - hot water tank, 53 - circulating water pump, 54 - water pipe, 55 - radiator, 56 - electrical cabinet, 58 - water inlet, 59 - water outlet, 60 - rack, 61 - ball screw shaft, 62 - bearing support, 63 - servo motor, 64 - rolling bearing, 65 - screw nut, 66 - microwave emission system, 67 - waveguide channel, 68 - isolation plate, 69 - protective isolation cover, 70 - filter power supply, 71 - heat exchanger, 72 - magnetron, 73 - antenna, 74 - microwave receiving hole, 75 - rectangular microwave release hole, 76 - circular microwave release hole, 77 - waveguide pipe, 78 - fastening screw, 79 - mold core, 80 - guide column groove, 81 - screw groove, 82 - front support shell, 83 - transmission window, 84 - rear support shell, 85 - waveguide groove, 86 - mold core support shell. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] Please refer to Figures 1-18 A pulp molding drying and forming device, comprising: a microwave drying forming part 9, a sliding table 7 and a cooling circulation system 5, characterized in that: the microwave drying forming part 9 and the sliding table 7 are arranged between an upper shell 1 and a lower shell 8, and the cooling circulation system 5 is arranged at the top end of the upper shell 1.

[0044] The lower end of the microwave drying forming part 9 is provided with a group of sliding tables 7 for providing mobile support to the lower end thereof, and the upper end of the pulp microwave drying forming part 9 is provided with a group of microwave drying end hydraulic systems 3 for providing hydraulic pressure to the inside thereof and is arranged at the central position of the upper shell 1, and the cooling circulation system 5 is arranged around the transfer part hydraulic system 4 and has a direct cooling relationship with the microwave drying forming part 9;

[0045] The microwave drying forming part 9 comprises, from bottom to top, a hot-pressing lower mold base 42, a hot-pressing lower mold fixed plate 43, a microwave hot-pressing lower mold 44, a microwave hot-pressing upper mold 36, a waveguide plate 35, a microwave heating system 34, a lifting fixed plate 33, and a microwave drying end hydraulic system 3 according to the operation mode.

[0046] The microwave heating system 34 is composed of a protective isolation cover 69 and a microwave emission system 66, the protective isolation cover 69 is an iron frame, and the inside of the iron frame is provided with horizontally and vertically welded isolation plates 68 and uniformly divides the entire protective isolation cover 69 into areas for independent and distributed installation of the microwave emission system 66.

[0047] The isolation plates 68 are uniformly distributed with several groups of rectangular holes of the same size and specification for realizing the intercommunication between the areas, and provide channels for the interconnection of the internal circuit of the microwave emission system 66, the heat exchanger cold water pipe 46, and the heat exchanger hot water pipe 47 in the later stage, and the top cover surface of the protective isolation cover 69 is uniformly distributed with a circular microwave emission port 45 for arranging an antenna 73.

[0048] The microwave emission system 66 is composed of a heat exchanger cold water pipe 46, a heat exchanger hot water pipe 47, a heat exchanger 71, a filter power supply 70, a magnetron 72, and an antenna 73, the magnetron 72 is an electric vacuum device for generating microwave energy, the electrons in the tube interact with high-frequency electromagnetic fields under the control of mutually perpendicular constant magnetic fields and constant electric fields, and the energy in the constant electric field provided by the filter power supply 70 is converted into microwave energy, the heat exchanger 71 is used to absorb the heat generated during the operation of the magnetron 72, and the heat exchanger cold water pipe 46 and the heat exchanger hot water pipe 47 provided on the side of the heat exchanger 71 are used to realize the circulation of the cooling medium in the heat exchanger 71.

[0049] The waveguide plate 35 is a cuboid aluminum plate, the front surface of which is in contact with the cover surface of the protective cover 69, and the back surface is in contact with the bottom surface of the microwave hot pressing upper mold 36. The waveguide plate 35 is internally provided with a group of waveguide channels 67 for conducting microwaves. The microwaves generated by the microwave emitting system 66 are guided into the microwave hot pressing upper mold 36 along a certain route. The contact surface of the waveguide plate 35 and the protective cover 69 is uniformly distributed with a rectangular microwave receiving hole 74. The contact surface of the waveguide plate 35 and the microwave hot pressing upper mold is provided with a rectangular microwave releasing hole 75 at the corresponding position. The two sides of the contact surface at the corresponding position are respectively provided with a circular microwave releasing hole 76. There are a total of three holes for connecting the microwave hot pressing upper mold. The microwave receiving hole 74 and the microwave releasing hole in the waveguide plate 35 are one-to-one corresponding through the waveguide channel 67, thereby realizing the function of uniform and directional waveguide.

[0050] The microwave hot pressing upper mold 36 is composed of a front support shell 82, a mold core support shell 86, a rear support shell 84 and a mold core 79. The materials of the front support shell 82, the mold core support shell 86 and the rear support shell 84 are aluminum, and the material of the mold core 79 is polytetrafluoroethylene. The front support shell 82 and the rear support shell 84 have the same structure and are similar to the structure of a conventional hot pressing upper mold. The center of the support shell is provided with a guide column groove 80 for installing the guide column 25. The guide column groove 80 is provided with a through screw groove 81 on both sides.

[0051] The long screw fixes the microwave hot pressing upper mold 36 on the upper end of the waveguide plate 35. The front support shell 82 and the rear support shell 84 are equally distributed with a group of waveguide channels 67 on the side surface, and are connected to the circular microwave releasing hole 76 of the waveguide plate 35 through the waveguide tube 77, thereby improving the uniformity of microwave distribution in the mold during drying. The front support shell 82 and the rear support shell 84 are each provided with a group of threaded holes on the side surface, and the side wall fastening screw 78 is arranged to realize the connection between the front support shell 82, the rear support shell 84 and the mold core support shell 86. The mold core support shell 86 is a rectangular groove structure, which is composed of a side wall and a bottom plate.

[0052] The left and right side walls of the mold core support shell 86 are similar to the front support shell 82 and the rear support shell 84, and are used for positioning and fixing the mold. That is, the center of the left and right side walls is provided with a guide column groove 80 for installing the guide column 25, and the guide column groove 80 is provided with a through screw groove 81 on both sides, which is used for fixing the microwave hot pressing upper mold 36 to the waveguide plate 35 through a long screw. The front and rear side walls of the mold core support shell 86 are provided with waveguide grooves 85, and a plurality of transmission windows 83 are uniformly distributed at the bottom of the waveguide grooves 85. The positions of the transmission windows 83 correspond one by one to the group waveguide channels 67 in the front support shell 82 and the rear support shell 84. The bottom plate of the mold core support shell 86 is provided with a transmission window 83, and the positions of the transmission windows 83 correspond one by one to the rectangular microwave release hole 75 provided in the middle of the waveguide plate 35. The microwave drying end hydraulic system is composed of a group of hydraulic cylinders and a root guide column 25, and is fixed to the center position of the upper shell 1 through a fastening screw 78. The lifting fixing plate is connected with the hydraulic cylinder piston rod 21 of the microwave drying end hydraulic system and the root guide column 25 through a threaded flange and a fastening screw 78.

[0053] The microwave hot pressing upper mold 36, the waveguide plate 35, and the microwave heating system 34 are sequentially installed on the lifting fixing plate through screws. The piston rod 21 is used to realize the vertical movement of the microwave hot pressing upper mold 36, the waveguide plate 35, and the microwave heating system 34 and the like. The guide column 25 is used to realize the horizontal positioning of the microwave hot pressing upper mold 36, the waveguide plate 35, and the microwave heating system 34 and the like.

[0054] The hot pressing lower mold base 42 is a rectangular cast iron box. The inside of the box body is hollow and provided with a support beam for strengthening the support force of the working surface of the box body. The side wall of the box body is provided with reinforcing ribs for strengthening the support force of the working surface. The bottom surface of the hot pressing lower mold base 42 is provided with a vacuum pipe joint and a cooling water drainage pipe 40.

[0055] The vacuum pipe joint is used to connect the vacuum suction system and provide vacuum suction force for the microwave hot pressing lower mold 44 during operation. The cooling water drainage pipe 40 is used to connect the sewage tank and discharge the water vapor cooled in the hot pressing lower mold base 42 during the operation of the microwave hot pressing lower mold 44 under the vacuum suction system.

[0056] The working surface of the hot pressing lower mold base 42 is provided with vacuum holes and screw holes, which are used for connecting the vacuum holes and screw holes in the hot pressing lower mold fixing plate 43 and the microwave hot pressing lower mold 44, respectively. At the same time, they are applied to the vacuum air suction system and the fastening of the microwave hot pressing lower mold 44. The surface of the microwave hot pressing lower mold 44 is attached with a metal mesh with small pores. When the vacuum suction system and the microwave heating system 34 operate at the same time, the metal mesh can filter the microwave in the vacuum suction air to prevent the leakage of the microwave.

[0057] As the first embodiment of the utility model: before drying, microwave drying forming part 9, suction filter forming part 11 butt joint suction pulp mould 15 microwave hot-pressing lower mould 44 will be formed into a wet paper blank, and according to the microwave hot-pressing lower mould 44 is pressed into a block, is transferred to the designated position of microwave drying forming part 9 by sliding table 7, and the microwave hot-pressing upper mould fixed to the lifting fixed plate is moved downward by the extension of the hydraulic cylinder piston rod 21 of the hydraulic system 3 of microwave drying forming part 9, and the microwave hot-pressing lower mould 44 is completed in the designated position, when drying, open microwave heating system 34, the microwave generated by microwave heating system 34 enters the microwave metal cavity formed by microwave hot-pressing lower mould 44 and microwave hot-pressing upper mould through waveguide plate 35, waveguide channel 67, waveguide tube 77 and transmission window 83, and the preliminary shaped wet paper blank is dried and secondary shaped.

[0058] As the second embodiment of the utility model: based on the elaboration in embodiment one, further, the water vapor generated in the forming process is sequentially passed through microwave hot-pressing lower mould 44, hot-pressing lower mould fixed plate 43 and hot-pressing lower mould base 42 under the action of vacuum suction force, and finally is discharged by vacuum pipe joint and one cooling water drainage pipe 40, after drying, close microwave heating system 34, the hydraulic cylinder piston rod 21 of the hydraulic system 3 of microwave drying forming part 9 is shortened, so that the microwave hot-pressing upper mould is moved upward and the microwave hot-pressing lower mould 44 is completed, and the sliding table 7 transfers microwave hot-pressing lower mould 44 and pulp moulding product to pulp moulding transfer part 6 to complete the station transfer.

[0059] The above only for the preferred embodiment of the utility model has been described, and does not limit the utility model, any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A pulp molding and drying equipment, comprising: The microwave drying forming part (9), the slide (7) and the cooling circulation system (5) are characterized in that: the microwave drying forming part (9) and the slide (7) are arranged between the upper shell (1) and the lower shell (8), and the cooling circulation system (5) is arranged at the top of the upper shell (1); The lower end of the microwave drying forming part (9) is provided with a set of slides (7) for providing moving support to its lower end. The upper end of the pulp microwave drying forming part (9) is provided with a set of microwave drying end hydraulic system (3) for providing hydraulic pressure to its interior and is located at the center of the upper shell (1). The cooling circulation system (5) is located around the transfer part hydraulic system (4) and has a direct cooling relationship with the microwave drying forming part (9). The microwave drying forming section (9) includes, from bottom to top, a hot-pressing lower mold base (42), a hot-pressing lower mold fixing plate (43), a microwave hot-pressing lower mold (44), a microwave hot-pressing upper mold (36), a waveguide plate (35), a microwave heating system (34), a lifting fixing plate (33), and a microwave drying end hydraulic system (3) according to the operating mode.

2. The pulp molding and drying equipment according to claim 1, characterized in that: The microwave heating system (34) consists of two parts: a protective isolation cover (69) and a microwave emitting system (66). The protective isolation cover (69) is a cast iron frame. The protective isolation cover (69) is equipped with horizontal and vertical welded isolation plates (68) inside and the entire protective isolation cover (69) is evenly divided into 28 areas for independent and distributed installation of the microwave emitting system (66). The isolation plate (68) has several sets of rectangular holes of the same size and specifications that are evenly distributed to enable interconnection between different areas, and provide a channel for the connection of the circuit, cold water pipe (46) and hot water pipe (47) of the microwave transmission system (66) in the later stage. The top surface of the protective isolation cover (69) has 28 circular microwave transmission ports (45) evenly distributed for mounting antennas (73).

3. The pulp molding and drying equipment according to claim 2, characterized in that: The microwave transmitting system (66) consists of six parts: a heat exchanger cold water pipe (46), a heat exchanger hot water pipe (47), a heat exchanger (71), a filter power supply (70), a magnetron (72), and an antenna (73). The magnetron (72) is an electric vacuum device used to generate microwave energy. Under the control of a constant magnetic field and a constant electric field that are perpendicular to each other, the electrons inside the tube interact with the high-frequency electromagnetic field and the energy in the constant electric field provided by the filter power supply (70) is converted into microwave energy. The heat exchanger (71) is used to absorb the heat generated by the magnetron (72) during operation. The heat exchanger cold water pipe (46) and the heat exchanger hot water pipe (47) provided on the side of the heat exchanger (71) are used to realize the circulation of the cooling medium inside the heat exchanger.

4. The pulp molding and drying equipment according to claim 1, characterized in that: The waveguide plate (35) is a rectangular aluminum plate. Its front side contacts the protective isolation cover (69), and its back side contacts the bottom surface of the microwave hot pressing mold (36). The waveguide plate (35) has 28 sets of waveguide channels (67) for conducting microwaves, that is, the microwaves generated by the microwave transmitting system (66) are guided into the microwave hot pressing mold (36) along a certain route. The contact surface between the waveguide plate (35) and the protective isolation cover (69) has 28 rectangular microwave receiving holes (74) evenly distributed. The corresponding position of the contact surface between the waveguide plate (35) and the microwave hot pressing mold (36) has 20 rectangular microwave releasing holes (75) concentrated. On the non-contact positions on both sides of the corresponding position of the contact surface, there are 4 circular microwave releasing holes (76) respectively. A total of 28 holes are used to connect the microwave hot pressing mold (36). The microwave receiving holes and microwave releasing holes in the waveguide plate (35) correspond one-to-one through the waveguide channels (67), thereby achieving the function of uniform and directional wave guidance.

5. The pulp molding and drying equipment according to claim 4, characterized in that: The microwave hot pressing upper mold (36) consists of four parts: a front support shell (82), a mold core support shell (86), a rear support shell (84), and a mold core (79). The materials of the front support shell (82), the mold core support shell (86), and the rear support shell (84) are aluminum 6061, while the material of the mold core (79) is polytetrafluoroethylene. The front support shell (82) and the rear support shell (84) have the same structure and are similar to the structure of a traditional hot pressing upper mold. The center of the support shell is provided with a guide post groove (80) for installing guide posts, and the guide post groove (80) is provided with through screw grooves (81) on both sides.

6. The pulp molding and drying equipment according to claim 5, characterized in that: The microwave hot pressing mold (36) is fixed to the upper end of the waveguide plate (35) by long screws. The front support housing (82) and the rear support housing (84) are each equidistantly distributed with 4 sets of waveguide channels (67), and are connected to the circular microwave release hole (76) of the waveguide plate (35) through the waveguide (77) to improve the uniformity of microwave distribution in the mold during drying. The front support housing (82) and the rear support housing (84) are each provided with 6 sets of threaded holes. The side wall fastening screws (78) are installed to realize the connection between the front support housing (82), the rear support housing (84) and the mold core support housing (86). The mold core support housing (86) is a rectangular groove structure, that is, it is composed of 4 side walls and 1 bottom plate. The left and right side walls of the mold core support housing (86) are similar to those of the front support housing (82) and the rear support housing (84), and are used for positioning and fixing the mold. That is, the center of the left and right side walls is provided with guide post grooves (80) for installing guide posts. The guide post grooves (80) are provided with through screw grooves (81) on both sides. The microwave hot pressing mold (36) is fixed to the waveguide plate (35) by long screws. The front and rear side walls of the mold core support housing (86) are provided with waveguide grooves (85) and four transmission windows (83) are evenly distributed at the bottom of the waveguide grooves (85). The positions are the same as those of the front support housing (82) and the rear support housing (84). The four waveguide channels (67) in 4) correspond one-to-one. The bottom plate of the core support housing (86) is provided with 20 transmission windows (83). The positions of the 20 transmission windows (83) correspond one-to-one with the 20 rectangular microwave release holes (75) provided in the middle of the waveguide plate (35). The microwave drying end hydraulic system (3) is composed of one set of hydraulic cylinders and four guide columns and is fixed to the center of the upper housing (1) by fastening screws. The lifting fixing plate (33) is connected to the hydraulic cylinder piston rod and four guide columns of the microwave drying end hydraulic system (3) by threaded flanges and fastening screws.

7. The pulp molding and drying equipment according to claim 6, characterized in that: The microwave hot pressing upper mold (36), waveguide plate (35), and microwave heating system (34) are sequentially installed on the lifting and fixing plate (33) by screws. The piston rod is used to realize the vertical movement of the microwave hot pressing upper mold (36), waveguide plate (35), and microwave heating system (34) components. The guide column is used to realize the horizontal positioning of the microwave hot pressing upper mold (36), waveguide plate (35), and microwave heating system (34) components. The hot press mold base (42) is a rectangular cast iron box with a hollow interior and a support beam to strengthen the support of the working surface. The side wall of the box is reinforced with ribs to strengthen the support of the working surface. The bottom surface of the hot press mold base (42) is provided with two vacuum pipe joints (39) and one cooling water drain pipe (40).

8. The pulp molding and drying equipment according to claim 7, characterized in that: The vacuum tube connector (39) is used to connect to the vacuum suction system and provide vacuum suction force for the microwave hot pressing mold (44) during operation, while the cooling water drain pipe (40) is used to connect to the sewage tank and discharge the water vapor cooled on the hot pressing mold base (42) under the vacuum suction system during the operation of the microwave hot pressing mold (44). The working surface of the hot pressing mold base (42) is provided with vacuum holes and threaded holes, which are used to connect the vacuum holes and threaded holes in the hot pressing mold fixing plate (43) and the microwave hot pressing mold (44), respectively. It is also used to connect the vacuum pumping system and fasten the microwave hot pressing mold (44). The surface of the microwave hot pressing mold (44) is covered with a metal mesh with small pores. When the vacuum pumping system and the microwave heating system (34) are running at the same time, the metal mesh can filter the microwaves in the vacuum pumped air to prevent microwave leakage.

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