Paper plastic mold drying system

Abstract

The present invention belongs to the technical field of paper and plastic mold production, and specifically relates to a paper and plastic mold drying system, including a drying box with a partition inside, the partition divides the drying box into a first cavity and a second cavity, a paper and plastic mold conveying device includes a tray and a multi-layer transmission chain, and the multi-layer transmission chain is located in the first cavity and the second cavity; a dehumidifying dryer is arranged on the side of the first cavity, the air supply port of the first cavity is connected to the air supply pipe of the drying and dehumidifying machine, and the return air port is connected to the dehumidification port of the drying and dehumidifying machine, and a dehumidifying circulation fan is also arranged in the first cavity; the dryer is arranged on the side of the second cavity, the air supply port of the second cavity is connected to the air supply pipe of the dryer, the return air port is connected to the return air pipe of the dryer, the air supply port of the second cavity is connected to the side air supply layer in the second cavity, and a mesh flow equalizing plate is arranged between the side air supply layer and the multi-layer transmission chain, and the wind speed on the mesh flow equalizing plate gradually changes from top to bottom. The system has good drying quality, high efficiency and low energy consumption.

Description

Technical Field

[0001] The invention belongs to the technical field of paper plastic mold production, and in particular relates to a paper plastic mold drying system. Background Art

[0002] Paper plastic molds are solid containers used to contain and limit the packaged objects, serving the circulation, storage and transportation of goods, that is, they are mainly used for the transportation and packaging of goods. In addition to being used as lunch boxes and tableware, paper plastic molds are more often used for industrial cushioning packaging, and their development is very rapid. Paper plastic molds are a new type of packaging material that has grown rapidly in recent years and are an excellent substitute for wood. Paper plastic molds adopt the manufacturing process of: raw material pulping--batch--compression molding--drying--setting. Because a large amount of moisture (about 55-60%) remains on the workpiece after compression molding, and the moisture content of the final product is 12-14%, so during the drying process of the workpiece, about half of the moisture of the workpiece weight must be removed, and all of this moisture must be removed by absorbing heat and turning into water vapor. The existing paper plastic mold drying system still has the following problems:

[0003] 1. The traditional drying process is in an integrated oven. The molded paper-plastic molded products enter from one end of the drying oven and come out from the other end of the drying oven. The transport device is usually a mobile rack that can hold multiple layers of paper-plastic molded products. The mobile rack is pushed in manually or can be moved automatically. The mobile rack enters the oven before drying and moves out of the oven after drying. When the paper-plastic mold is dried in the oven, it cannot be dried gradually in different layers at different positions of the oven, and the drying process cannot be carried out continuously;

[0004] 2. The existing drying system also uses a single-layer conveyor chain to transport paper and plastic mold products in the drying box. The use of a single-layer conveyor chain will result in fewer paper and plastic mold products being dried in the drying box at one time. The length of the drying box is set relatively long, occupying a large area. In addition, it also requires a long drying time, resulting in low drying efficiency of the paper and plastic mold products.

[0005] 3. The existing drying boxes generally adopt the combustion chamber drying method, which uses coal, electricity or natural gas to heat the air to provide a drying heat source for the drying chamber. However, the existing drying system is not optimized for the settings of the drying box, dryer, fan and air duct components, resulting in the existing drying process still having problems such as low drying quality, low drying efficiency and high energy consumption;

[0006] 4. Since the quality of paper-plastic film products before and after drying is quite different, it is necessary to ensure that the paper-plastic film products are not blown off during the strong wind convection drying process. Therefore, the existing strong wind convection drying process generally blows air perpendicularly to the paper-plastic film products. However, the paper-plastic film products themselves will block the wind, so the existing paper-plastic film drying box will limit the number of conveying layers of paper-plastic film products, resulting in fewer products being dried at one time and low drying efficiency. Summary of the invention

[0007] The purpose of the present invention is to provide a paper plastic mold drying system in view of the above-mentioned problems and shortcomings, which has reasonable design, simple manufacture and maintenance, good drying quality, high drying efficiency and can reduce energy consumption.

[0008] To achieve the above purpose, the technical solution adopted is:

[0009] A paper mold drying system, comprising a drying box, a dehumidifying dryer, a dryer and a paper mold conveying device; a partition is arranged inside the drying box, and the partition divides the inside of the drying box into a first cavity and a second cavity; the paper mold conveying device comprises a tray and a multi-layer transmission chain for circulating the tray, each layer of the transmission chain comprises two parallel transmission chains and a sprocket connected to the end of the transmission chain, the tray is connected between the two parallel transmission chains, and the upper and lower adjacent layers of the transmission chain are connected as a whole through one or more sprockets at the end; several layers of the multi-layer transmission chain are located in the first cavity, and several layers are located in the second cavity; the end of the drying box is provided with a transmission chain outlet and a transmission chain inlet; the dehumidifying dryer is arranged on the side of the first cavity, and the air outlet of the first cavity It is connected with the air supply duct of the drying and dehumidifier, and the return air outlet is connected with the dehumidification outlet of the drying and dehumidifier. A dehumidification circulation fan is arranged in the first cavity, and the dehumidification circulation fan blows hot air vertically onto the paper-plastic mold product. The paper-plastic mold product is preliminarily dried and dehumidified in the upper cavity; the dryer is arranged on the side of the second cavity, the air supply outlet of the second cavity is connected with the air supply duct of the dryer, the return air outlet is connected with the return air duct of the dryer, the air supply outlet of the second cavity is connected with the side air supply layer in the second cavity, a mesh flow equalizing plate is arranged between the side air supply layer and the multi-layer transmission chain, the return air outlet of the lower cavity and the mesh flow equalizing plate are arranged correspondingly on both sides of the multi-layer transmission chain, the wind speed on the mesh flow equalizing plate gradually changes from top to bottom, and the paper-plastic mold product is gradually dried and formed in the second cavity.

[0010] Furthermore, in the above-mentioned paper plastic mold drying system, the partition is a transverse partition, and the transverse partition divides the interior of the drying box into an upper cavity and a lower cavity, the upper cavity is a first cavity, and the lower cavity is a second cavity. The multi-layer transmission chain is transmitted from top to bottom, and several upper layers of the multi-layer transmission chain are located in the upper cavity, and several lower layers are located in the lower cavity. A gap is provided between the end of the transverse partition and the drying box for the transmission chain to pass through.

[0011] Furthermore, in the above-mentioned paper plastic mold drying system, the air supply outlet of the upper cavity is located at the upper side of the multi-layer transmission chain in the upper cavity, the return air outlet is located at the lower side of the multi-layer transmission chain in the upper cavity, and the dehumidification circulation fan is connected to the upper part of the multi-layer transmission chain in the upper cavity through a bracket.

[0012] Furthermore, in the above-mentioned paper plastic mold drying system, the air supply port of the lower cavity is located at the upper side of the multi-layer transmission chain in the lower cavity, the return air port is located at the middle side of the multi-layer transmission chain in the lower cavity, and a transverse air supply layer is provided between the multi-layer transmission chain and the transverse partition in the lower cavity. The transverse air supply layer connects the air supply port with the side air supply layer, and the wind speed on the mesh flow equalizing plate gradually decreases from top to bottom, and the paper plastic mold product is gradually dried and formed from top to bottom in the lower cavity.

[0013] Furthermore, in the above-mentioned paper-plastic mold drying system, arc-shaped guide plates are provided at the upper corners and the lower corners of the inner wall of the side air supply layer.

[0014] Furthermore, in the above-mentioned paper plastic mold drying system, the drying dehumidifier, dryer and dehumidifying circulation fan are all set in multiple, multiple drying dehumidifiers are arranged at intervals from one end to the other end on the outer side of the first cavity, multiple dryers are arranged at intervals from one end to the other end on the outer side of the second cavity, and multiple dehumidifying circulation fans are arranged at intervals from one end to the other end in the first cavity.

[0015] Furthermore, in the above-mentioned paper plastic mold drying system, a solar hot air component is also provided on the outside of the drying box, and the solar hot air component includes a solar collector header, a dehumidifier, a main circulation fan and a sub-circulation fan connected in sequence.

[0016] Furthermore, in the above-mentioned paper plastic mold drying system, a chain accessory is connected to the inner side of the conveying chain, and connecting ears are provided in the middle of both ends of the tray. The connecting ears are hingedly connected to the chain accessory through a pin shaft, and the upper part of the connecting ear is arranged as a structure that gradually bulges from both ends to the middle.

[0017] Furthermore, in the above-mentioned paper plastic mold drying system, the mesh flow equalizing plate includes a flow equalizing plate body, which is divided into several layers of mesh plates with gradually decreasing or increasing mesh sizes from top to bottom, and each layer of mesh plates is evenly distributed with multiple meshes of equal sizes.

[0018] Furthermore, in the above-mentioned paper-plastic mold drying system, the drying box is a cavity surrounded by a heat-insulating shell, and the transmission chain outlet and the transmission chain inlet on the drying box are located at the same end of the drying box.

[0019] The beneficial effects achieved by adopting the above technical solution are:

[0020] 1. The paper mold drying system of the present invention has a reasonable design and is simple to manufacture and maintain. A dehumidification circulation fan is arranged in the first cavity to blow air vertically onto the paper mold product, which can accelerate the drying of the paper mold product and accelerate the discharge of water-containing air, so that the paper mold product can first quickly complete preliminary drying and dehumidification in the first cavity; in the second cavity, since the mesh flow equalizing plate and the return air port are arranged on both sides of the multi-layer transmission chain, it is equivalent to drying the paper mold product in the form of strong wind convection. The arrangement of the mesh flow equalizing plate can make the drying of the paper mold more uniform, the drying speed is fast, and the quality is good. Since the mesh flow equalizing plate is arranged on the side of the multi-layer transmission chain, the strong wind can blow directly to the multi-layer paper mold product at the same time, and the multi-layer paper mold products will not block the wind from each other, which can improve the drying efficiency of the paper mold product, thereby reducing the same number of paper molds. The drying time of the mold product is shortened. In addition, the wind speed on the mesh flow-equalizing plate gradually changes from top to bottom to adapt to the weight of the paper-plastic mold product at different drying stages. The paper-plastic mold product with a small weight corresponds to a smaller wind speed, thereby preventing the paper-plastic mold product from being blown off. The drying system is used in two relatively independent chambers in sequence to continuously and rapidly perform the drying process. When a dehumidifier is used for dehumidification, only the air with a higher water content in the first chamber can be extracted, and the relatively dry air in the second chamber can be avoided from being extracted, thereby reducing energy loss. When the paper-plastic mold product is gradually dried and formed in the second chamber, the air with a higher water content in the first chamber will not affect the paper-plastic mold product that has been dehydrated in the second chamber. Therefore, the paper-plastic mold drying system generally occupies a small area, has good drying quality, high drying efficiency, and can reduce energy consumption.

[0021] 2. A solar hot air component is also installed on the outside of the drying box. Using solar energy as a heat source is different from using ordinary fossil fuels as a heat source. The heat generated by burning ordinary fossil fuels such as coal, electricity, oil, and gas will pollute the air and is very expensive. Solar energy uses sunlight to generate energy, which is pollution-free, renewable, and environmentally friendly. After adding the solar hot air component, the power consumption of the equipment can be reduced during the day, and the electricity bill is higher during the day, which can greatly reduce the operating cost of the equipment.

[0022] 3. Chain accessories are connected to the inner side of the transmission chain, and connecting ears are provided in the middle of both ends of the pallet. The connecting ears are hingedly connected to the chain accessories through pins. When the transmission chain moves cyclically, no matter how the transmission chain changes direction, the pallet is hung on the chain accessories with its front side always facing upward, which can adapt to various transmission and transportation environments and ensure that the paper-plastic mold conveying device can move cyclically in one or more spaces in the drying box. The upper part of the connecting ear is set as a structure that gradually bulges from both ends to the middle, which can make the center of gravity of the connecting ear and the pallet as much as possible concentrated on the center line of the pallet, and can ensure that the front of the pallet is always facing upward and the upper surface of the pallet is as horizontal as possible to prevent the paper-plastic film products thereon from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention, wherein the drawings are only used to illustrate some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0024] Figure 1 Schematic diagram of the internal structure of a paper plastic mold drying system according to an embodiment of the present invention.

[0025] Figure 2 Schematic diagram of the structure of a mesh current equalizing plate according to an embodiment of the present invention.

[0026] Figure 3 This is one of the main structural schematic diagrams of the paper plastic mold drying system according to an embodiment of the present invention.

[0027] Figure 4 Schematic diagram of the front and cross-sectional structure of a paper-plastic mold drying system according to an embodiment of the present invention.

[0028] Figure 5 This is the second schematic diagram of the main structure of the paper plastic mold drying system according to an embodiment of the present invention.

[0029] Figure 6 This is one of the schematic diagrams of the top view of the paper plastic mold drying system according to an embodiment of the present invention.

[0030] Figure 7 This is a second schematic diagram of the top view of the paper plastic mold drying system according to an embodiment of the present invention.

[0031] Figure 8 Schematic diagram of the structure of a multi-layer transmission chain according to an embodiment of the present invention.

[0032] Fig. 9 Schematic diagram of the side structure of a tray according to an embodiment of the present invention.

[0033] Serial number in the picture:

[0034] 1 is a drying box, 11 is an upper cavity, 111 is an air supply port, 112 is a return air port, 12 is a lower cavity, 121 is an air supply port, 122 is a return air port, 123 is a horizontal air supply layer, 124 is a side air supply layer, 13 is a transverse partition, 14 is a left cavity, 15 is a right cavity, 16 is a longitudinal partition, 2 is a dehumidification dryer, 3 is a dehumidification circulation fan, 4 is a dryer, 41 is an air supply duct, 42 is a return air duct, 5 is a mesh flow equalizing plate, 51 is a mesh plate, 52 is a mesh, 6 is an arc guide plate, 7 is a paper mold conveying device, 71 is a transmission chain, 72 is a sprocket, 73 is a chain accessory, 74 is a tray, 75 is a connecting ear, and 8 is a solar thermal wind component. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings of specific embodiments of the present invention to clearly and completely describe the exemplary scheme of the embodiment of the present invention. Unless otherwise defined, the technical terms or scientific terms used in the present invention should be the common meanings understood by people with ordinary skills in the field.

[0036] In the description of the present invention, it should be understood that the expressions “first” and “second” are used to describe the various elements of the present invention and do not represent any limitation of order, quantity or importance, but are only used to distinguish one component from another.

[0037] It should be noted that when one element is “connected”, “coupled” or “connected” to another element, it may mean that they are directly connected, coupled or connected, but it should be understood that there may be intermediate elements between the two; that is, the positional relationships of direct connection and indirect connection are covered.

[0038] It should be noted that the use of "a" or "an" and similar words does not necessarily indicate a quantitative limitation. "Include" or "comprising" and similar words mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects.

[0039] It should be noted that terms such as "up", "down", "left" and "right" indicating orientation or positional relationship are only used to indicate relative positional relationship. This is for the convenience of describing the present invention and does not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0040] See also Figure 1 and Fig. 9The present application discloses a paper mold drying system, comprising a drying box, a dehumidifying dryer, a drying machine and a paper mold conveying device; a partition is arranged inside the drying box, the partition divides the interior of the drying box into a first cavity and a second cavity, the paper mold conveying device comprises a tray and a multi-layer transmission chain for circulating and transporting the tray, each layer of the transmission chain comprises two parallel transmission chains and a sprocket connected to the end of the transmission chain, the tray is connected between the two parallel transmission chains, and the two upper and lower adjacent layers of the transmission chains are connected as a whole through one or more sprockets at the end, several layers of the multi-layer transmission chain are located in the first cavity, and several layers are located in the second cavity, and a transmission chain outlet and a transmission chain inlet are arranged at the end of the drying box; the dehumidifying dryer is arranged on the side of the first cavity, and in this embodiment, the dehumidifying dryer adopts a heat pump to heat the air, and uses condensation to discharge the moisture in the return air, and the dehumidifying dryer is also provided with a fan for conveying hot air, and the delivery of the first cavity The air outlet is connected with the air supply pipe of the drying and dehumidifying machine, and the return air outlet is connected with the dehumidification outlet of the drying and dehumidifying machine. A dehumidifying circulation fan is arranged in the first cavity, and the dehumidifying circulation fan blows hot air vertically onto the paper and plastic mold products, and the paper and plastic mold products are preliminarily dried and dehumidified in the upper cavity; the dryer is arranged on the side of the second cavity. In this embodiment, the dryer adopts a heat pump to heat the air. The dryer is also provided with a fan to transport hot air, and the heat in the superheated return air can be recovered through the condenser. The air supply outlet of the second cavity is connected with the air supply pipe of the dryer, and the return air outlet is connected with the return air pipe of the dryer. The air supply outlet of the second cavity is connected with the side air supply layer in the second cavity, and a mesh flow equalizing plate is arranged between the side air supply layer and the multi-layer transmission chain. The return air outlet of the lower cavity and the mesh flow equalizing plate are arranged correspondingly on both sides of the multi-layer transmission chain. The wind speed on the mesh flow equalizing plate gradually changes from top to bottom, and the paper and plastic mold products are gradually dried and formed in the second cavity.

[0041] The paper mold drying system of the present embodiment has a reasonable design and is simple to manufacture and maintain. The drying box is set as a two-stage cavity, and a multi-layer transmission chain with a circulating motion is used to gradually move the paper mold product from the first cavity to the second cavity. A dehumidification circulation fan is provided in the first cavity to blow air vertically onto the paper mold product, which can accelerate the drying of the paper mold product and accelerate the discharge of water-containing air, so that the paper mold product can first quickly complete preliminary drying and dehumidification in the first cavity, and then move to the second cavity for gradual drying and forming; in the second cavity, since the mesh flow equalizing plate and the return air port are correspondingly arranged on both sides of the multi-layer transmission chain, it is equivalent to drying the paper mold product in the form of strong wind convection. The arrangement of the mesh flow equalizing plate can make the drying of the paper mold more uniform, the drying speed is fast, and the quality is good. Since the mesh flow equalizing plate is arranged on the side of the multi-layer transmission chain, the strong wind can blow directly to the multi-layer paper mold product at the same time, and the multi-layer paper mold products will not block the wind from each other, which can improve the drying efficiency of the paper mold product, thereby reducing The drying time of the same number of paper mold products is regulated. In addition, the wind speed on the mesh flow equalizing plate gradually changes from top to bottom to adapt to the weight of the paper mold products at different drying stages. The paper mold products with light weight correspond to smaller wind speeds, thereby preventing the paper mold products from being blown off. The drying system is used to carry out continuous, uninterrupted and rapid drying in two relatively independent chambers. When the paper mold products are initially dried and dehumidified in the first chamber, the water content of the paper mold products is relatively high at this time, resulting in a high water content in the air in the first chamber. When a dehumidifier is used for dehumidification, only the air with a high water content in the first chamber can be extracted, and the relatively dry air in the second chamber can be avoided from being extracted, thereby reducing energy loss. When the paper mold products are gradually dried and formed in the second chamber, the air with a high water content in the first chamber will not affect the paper mold products in the second chamber that have been dehydrated. Therefore, on the whole, the paper mold drying system occupies a small area, has good drying quality, high drying efficiency, and can reduce energy consumption.

[0042] In this embodiment, preferably, the partition is a transverse partition, which divides the interior of the drying box into an upper cavity and a lower cavity, the upper cavity is the first cavity, and the lower cavity is the second cavity. The multi-layer transmission chain is transmitted from top to bottom. Since the hot air containing moisture will move upward, it can ensure that the paper plastic mold products that gradually move downward can be less affected by the water-containing return air, so that they are gradually dried, which can further improve the drying efficiency. The upper several layers of the multi-layer transmission chain are located in the upper cavity, and the lower several layers are located in the lower cavity. A gap is provided between the end of the transverse partition and the drying box for the transmission chain to pass through. In other embodiments, the partition can also be a longitudinal partition, which divides the interior of the drying box into a left cavity and a right cavity, the left cavity is the first cavity, and the right cavity is the second cavity. However, dividing the drying box into upper and lower cavities can make better use of the space in the drying box than dividing it into left and right cavities, and can make more effective drying paths for the paper plastic film products on the transmission chain.

[0043] In this embodiment, preferably, the air supply port of the upper cavity is located at the upper side of the multi-layer transmission chain in the upper cavity, the air return port is located at the lower side of the multi-layer transmission chain in the upper cavity, and the dehumidification circulation fan is connected to the upper part of the multi-layer transmission chain in the upper cavity through a bracket. The dehumidification circulation fan blows hot air downward, and the hot air tends to move downward and upward. The hot air is not easy to be blown out directly from the side, and the hot air can be more evenly distributed in the upper cavity, so that it can be fully utilized.

[0044] In this embodiment, preferably, the air supply outlet of the lower cavity is located at the upper side of the multi-layer transmission chain in the lower cavity, and the return air outlet is located at the middle side of the multi-layer transmission chain in the lower cavity. A transverse air supply layer is provided between the multi-layer transmission chain and the cross partition in the lower cavity. The transverse air supply layer connects the air supply outlet with the side air supply layer, and has good space utilization, which facilitates the side air supply layer to be relatively arranged on the other side of the return air outlet. The wind speed on the mesh flow equalizing plate gradually decreases from top to bottom, and the paper-plastic mold product is gradually dried and formed from top to bottom in the lower cavity.

[0045] In this embodiment, preferably, arc-shaped guide plates are provided at the upper corners and the lower corners of the inner wall of the side air supply layer, which can smoothly guide the hot air to the front of the mesh flow equalizing plate.

[0046] In this embodiment, preferably, a plurality of drying dehumidifiers, dryers and dehumidifying circulation fans are provided, and a plurality of drying dehumidifiers are arranged at intervals from one end to the other end on the outer side of the first cavity, a plurality of dryers are arranged at intervals from one end to the other end on the outer side of the second cavity, and a plurality of dehumidifying circulation fans are arranged at intervals from one end to the other end in the first cavity, which can make the hot air in the longer upper cavity and the lower cavity more evenly distributed.

[0047] In this embodiment, preferably, a solar hot air assembly is also provided outside the drying box, and the solar hot air assembly includes a solar heat collecting pipe manifold, a dehumidifier, a main circulation fan and a sub-circulation fan connected in sequence. The solar heat collecting pipe manifold is used to generate high-temperature and high-pressure gas, and its principle of generating hot air is similar to a solar heating system with application number 2013101772565. The dehumidifier is used to remove moisture from the high-temperature and high-pressure gas. The air outlet of the dehumidifier is connected to the air inlet of the main circulation fan, and the air outlet of the main circulation fan is connected to the air inlet of the sub-circulation fan. The air outlet of the sub-circulation fan is connected to each air supply port of the upper cavity and the lower cavity. Using solar energy as a heat source is different from using ordinary fossil fuels as a heat source. The combustion of ordinary fossil fuels such as coal, electricity, oil, and gas will pollute the air and the cost is high, while solar energy uses sunlight to generate energy, which is pollution-free, renewable, and environmentally friendly. The energy consumption cost of the drying box in this embodiment is half of the energy consumption cost of burning coal (if the price of anthracite exceeds 1,000 yuan per ton, then the energy consumption cost is one-third of that of burning coal). The solar hot air component can work for 0-12 hours in spring, 0-14 hours in summer, 0-12 hours in autumn, and 0-10 hours in winter. Except for rainy weather, the solar hot air component can stably achieve the maximum working efficiency. The energy consumption of the equipment is extremely small when the solar hot air component is working (if the solar heating effect on rainy days cannot reach the production setting data, the dryer and dehumidification dryer intelligently intervene to supplement the heat source). After adding the solar hot air component, the power consumption of the equipment during the day can be reduced, and the electricity bill is higher during the day, which can greatly reduce the operating cost of the equipment.

[0048] In this embodiment, preferably, a chain accessory is connected to the inner side of the conveying chain, and connecting ears are provided in the middle of both ends of the pallet, and the connecting ears are hingedly connected to the chain accessory through a pin shaft. When the transmission chain moves in a cycle, no matter how the transmission chain changes direction, the pallet is hung on the chain accessory with its front side always facing upward, which can adapt to various transmission and transfer environments and ensure that the paper-plastic mold conveying device can move in a cycle in one or more spaces in the drying box; the upper part of the connecting ear is set as a structure that gradually bulges from both ends to the middle, which can make the center of gravity of the connecting ear and the pallet as concentrated as possible on the center line of the pallet, and can ensure that the front of the pallet is always facing upward and the upper surface of the pallet is as horizontal as possible to prevent the paper-plastic film products thereon from falling.

[0049] In this embodiment, preferably, the mesh flow equalizing plate includes a flow equalizing plate body, which is divided into several layers of mesh plates with gradually smaller or larger mesh sizes from top to bottom, and each layer of mesh plates is evenly distributed with multiple meshes of equal sizes. When the mesh sizes become smaller, the number of meshes on the mesh plates increases, and the hot air speed becomes smaller and gentler.

[0050] In this embodiment, preferably, the drying box is a cavity surrounded by an insulating shell, which can reduce heat loss. The transmission chain outlet and the transmission chain inlet on the drying box are located at the same end of the drying box, which can shorten the transmission distance of the transmission chain outside the drying box and reduce the equipment investment cost.

[0051] The preferred embodiments for implementing the present invention have been described in detail above, but it should be understood that the role of these embodiments is only to exemplify, and is not intended to limit the scope, applicability or configuration of the present invention in any way. The protection scope of the present invention is defined by the attached claims and their equivalents. A person of ordinary skill in the art can make many changes to the above embodiments under the guidance of the present invention, and these changes all fall within the protection scope of the present invention.

Claims

1. A paper plastic mold drying system, characterized in that: It includes a drying box, a dehumidifying dryer, a drying machine and a paper mold conveying device; The drying box is provided with a partition plate inside, and the partition plate divides the inside of the drying box into a first cavity and a second cavity. The paper mold conveying device includes a tray and a multi-layer transmission chain for circulating the tray. Each layer of the transmission chain includes two parallel transmission chains and a sprocket connected to the end of the transmission chain. The tray is connected between the two parallel transmission chains. The upper and lower adjacent layers of the transmission chain are connected as a whole through one or more sprockets at the end. Several layers of the multi-layer transmission chain are located in the first cavity, and several layers are located in the second cavity. The end of the drying box is provided with a transmission chain outlet and a transmission chain inlet; The dehumidifying dryer is arranged on the side of the first cavity, the air supply port of the first cavity is connected with the air supply pipe of the drying dehumidifier, and the return air port is connected with the dehumidification port of the drying dehumidifier. A dehumidifying circulation fan is arranged in the first cavity, and the dehumidifying circulation fan blows hot air vertically onto the paper-plastic mold product, and the paper-plastic mold product is preliminarily dried and dehumidified in the upper cavity; The dryer is arranged on the side of the second cavity, the air supply port of the second cavity is connected with the air supply pipe of the dryer, the return air port is connected with the return air pipe of the dryer, the air supply port of the second cavity is connected with the side air supply layer in the second cavity, a mesh flow equalizing plate is arranged between the side air supply layer and the multi-layer transmission chain, the return air port of the lower cavity and the mesh flow equalizing plate are arranged correspondingly on both sides of the multi-layer transmission chain, the wind speed through the mesh flow equalizing plate gradually changes from top to bottom, and the paper plastic mold product is gradually dried and formed in the second cavity; The partition is a transverse partition, and the transverse partition divides the interior of the drying box into an upper cavity and a lower cavity. The upper cavity is a first cavity, and the lower cavity is a second cavity. The multi-layer transmission chain is transmitted from top to bottom. The upper layers of the multi-layer transmission chain are located in the upper cavity, and the lower layers are located in the lower cavity. A gap is provided between the end of the transverse partition and the drying box for the transmission chain to pass through; the air supply port of the upper cavity is located at the upper side of the multi-layer transmission chain in the upper cavity, and the return air port is located at the upper side of the multi-layer transmission chain in the upper cavity. The dehumidification circulation fan is connected to the upper part of the multi-layer transmission chain in the upper cavity through a bracket; the air supply port of the lower cavity is located at the upper part of the side of the multi-layer transmission chain in the lower cavity, and the return air port is located in the middle part of the side of the multi-layer transmission chain in the lower cavity. A transverse air supply layer is provided between the multi-layer transmission chain and the transverse partition in the lower cavity, and the transverse air supply layer connects the air supply port with the side air supply layer. The wind speed on the mesh flow equalizing plate gradually decreases from top to bottom, and the paper mold product is gradually dried and formed from top to bottom in the lower cavity; The drying dehumidifier, dryer and dehumidifying circulation fan are all provided in plurality, and the plurality of drying dehumidifiers are arranged at intervals from one end to the other end on the outer side of the first cavity, the plurality of dryers are arranged at intervals from one end to the other end on the outer side of the second cavity, and the plurality of dehumidifying circulation fans are arranged at intervals from one end to the other end in the first cavity; The inner side of the conveying chain is connected with a chain attachment, and the middle part of both ends of the tray is provided with a connecting ear, and the connecting ear is hingedly connected to the chain attachment through a pin shaft, and the upper part of the connecting ear is set as a structure that gradually bulges from both ends to the middle; The mesh flow balancing plate comprises a flow balancing plate body, which is divided into several layers of mesh plates with gradually decreasing or increasing mesh sizes from top to bottom, and each layer of mesh plates is evenly distributed with a plurality of meshes of equal sizes.

2. A paper plastic mold drying system according to claim 1, characterized in that: Arc-shaped guide plates are provided at the upper corner and the lower corner of the inner wall of the side air supply layer.

3. A paper plastic mold drying system according to claim 1, characterized in that: A solar hot air component is also arranged outside the drying box, and the solar hot air component comprises a solar heat collecting pipe header, a dehumidifier, a main circulation fan and a sub-circulation fan which are connected in sequence.

4. A paper plastic mold drying system according to claim 1, characterized in that: The drying box is a cavity surrounded by a heat-insulating shell, and the transmission chain outlet and the transmission chain inlet on the drying box are located at the same end of the drying box.

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