Paper pulp double-section heating and pressurizing device
By setting up four workstations in the pulp forming machine and using vacuum tubes and air holes to process the wet preform, the problem of uneven distribution and breakage of the wet preform during heating and pressurization was solved, thus improving product quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BIGUAR MASCH TECH WUXI CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-15
AI Technical Summary
When a pulp molding machine directly heats and presses a wet preform with a high moisture content, it can easily lead to uneven distribution, breakage, and adhesion of the pulp to the mold, affecting product quality and production efficiency.
A two-stage heating and pressurizing device for pulp is adopted. By setting up four work stations in the frame, the wet preform is processed by cold pre-pressing and two-stage hot pressing. Vacuum tubes and air holes are set in the upper mold base to absorb moisture and reduce the moisture content of the wet preform.
It improves the yield and production efficiency of pulp molding, reduces the moisture in the wet preform, avoids pulp breakage and adhesion, and ensures product quality.
Smart Images
Figure CN224243575U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of paper-plastic molding technology, and in particular to a two-stage heating and pressurizing device for paper pulp. Background Technology
[0002] Pulp molding is a three-dimensional papermaking technology that uses plant fragments, various fibers, water, and other materials as raw materials to create paper products of a certain shape using special molds on a molding machine.
[0003] A pulp molding machine typically includes a frame, a pulp tank located within the frame, a first hot pressing station, and a second hot pressing station. After the lower mold seat in the pulp tank scoops pulp to obtain a wet preform, the upper mold seat located at the first hot pressing station moves above it to transfer the wet preform to the first hot pressing station for the first mold closing, heating, and pressing. Then, it is transferred to the second hot pressing station for the second mold closing, heating, and pressing to remove moisture from the pulp and obtain a paper-plastic molded product.
[0004] Since the upper die of the first hot pressing station directly transfers the wet preform obtained by the lower die to the pulp, the wet preform has a high water content at this time. Direct heating and pressing of it can easily lead to uneven distribution of pulp, pulp breakage, and adhesion to the die, which affects product quality and production efficiency.
[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0006] To address the shortcomings of existing technologies, this utility model discloses a two-stage heating and pressurizing device for pulp, which solves the problem that directly heating and pressurizing the wet preform with high moisture content in the pulp molding machine causes pulp breakage and adhesion to the mold, thus affecting product quality and production efficiency.
[0007] The technical solution adopted in this utility model is as follows:
[0008] A two-stage heating and pressurizing device for pulp includes: a frame, which is a hollow structure, with a first working area, a second working area, a third working area, and a fourth working area sequentially arranged along the length of the inner side of the frame; the first working area is provided with a water tank, a first upper mold base, and a first lower mold base, the water tank being located at the lower end of the inner side of the frame, and pulp being placed in the water tank; the first upper mold base is slidably disposed at the upper end of the inner side of the frame, and the first lower mold base is configured to scoop pulp from the water tank to form a wet preform, and to close the preform with the first upper mold base to pre-press the wet preform to form a first semi-finished product; the second working area is provided with a second upper mold base and a second lower mold base, the second upper mold base being slidably disposed at the upper end of the inner side of the frame. The second lower mold base is configured to close and heat with the second upper mold base to hot-press the first semi-finished product into the second semi-finished product; a third upper mold base and a third lower mold base are provided in the third work station area, the third upper mold base is slidably disposed on the upper inner side of the frame, and the third lower mold base is configured to close and heat with the third upper mold base to hot-press the second semi-finished product into the third semi-finished product; a horizontal moving mechanism is disposed in the frame and configured to drive the first upper mold base, the second upper mold base and the third upper mold base to slide simultaneously along the length direction of the frame, and vacuum tubes are respectively provided at the upper ends of the first upper mold base, the second upper mold base and the third upper mold base, and the vacuum tubes are respectively connected to the lower end surfaces of the first upper mold base, the second upper mold base and the third upper mold base.
[0009] A further technical solution is that a plurality of air holes are opened on the upper surface of the first lower mold base, an air chamber is opened inside the first lower mold base, and a second vacuum blowing common pipe is provided at the lower end of the first lower mold base. The air holes, the air chamber, and the second vacuum blowing common pipe are connected in sequence.
[0010] A further technical solution is that a baffle is installed in the air chamber at the upper end of the second vacuum blowing pipe.
[0011] A further technical solution is that the horizontal moving mechanism includes a motor and a ball screw. The motor is mounted on one side of the upper inner side of the frame. The first end of the ball screw is connected to the output end of the motor, and the second end of the ball screw is rotatably connected to the other side of the upper inner side of the frame. The first upper die holder, the second upper die holder, and the third upper die holder are connected by a connecting block. The ball screw is threaded to the upper end of any one of the first upper die holder, the second upper die holder, and the third upper die holder.
[0012] A further technical solution is that the first upper mold base, the second upper mold base, the second lower mold base, the third upper mold base, and the third lower mold base are sequentially provided with a forming template, a heat insulation plate, and a heating plate facing the semi-finished product direction, and the first lower mold base includes a forming template.
[0013] A further technical solution is that the molding template further includes a lower molding template and an upper molding template disposed on the side of the lower molding template near the semi-finished product, wherein the upper molding template in the first upper mold base, the second upper mold base, the second lower mold base, the third upper mold base and the third lower mold base is a water-cooled plate.
[0014] A further technical solution is that the first upper mold base, the second upper mold base, the second lower mold base, the third upper mold base, and the third lower mold base have air chambers. The first upper mold base, the second upper mold base, the second lower mold base, the third upper mold base, and the third lower mold base have a plurality of air holes on their surfaces near the semi-finished product. Vacuum tubes are respectively provided at the lower ends of the second lower mold base and the third lower mold base. The air holes, air chambers, and vacuum tubes in the same mold base are connected in sequence. Air blowing pipes are respectively provided at the upper ends of the second upper mold base, the lower ends of the second lower mold base, the upper ends of the third upper mold base, and the lower ends of the third lower mold base. The air holes, air chambers, and air blowing pipes in the same mold base are connected in sequence.
[0015] A further technical solution is that two slide rails are arranged parallel to each other along the length direction on the upper inner side of the frame, and several pairs of sliders are respectively arranged on the upper ends of the first upper mold base, the second upper mold base and the third upper mold base, and the sliders are engaged with the slide rails.
[0016] A further technical solution is that lifting cylinders are respectively installed between the first lower mold base, the second lower mold base, and the third lower mold base and the bottom inner side of the frame.
[0017] A further technical solution is that the four corners of the first lower mold base, the four corners of the second lower mold base, and the four corners of the third lower mold base slide through the guide post respectively. The upper end of the guide post passing through the first lower mold base is fixed to the top of the inner side of the frame, and the lower end of the guide post passing through the second and third lower mold bases is fixed to the bottom of the inner side of the frame.
[0018] The beneficial effects of this utility model embodiment are as follows:
[0019] (i) The pulp dual-stage heating and pressurizing device of this utility model sets four work stations in the frame. In the first three work stations, the upper mold seat and the lower mold seat close the mold to perform cold pre-pressing and two-stage hot pressing on the pulp. After cold pre-pressing, the moisture content in the wet preform is significantly reduced, which improves the molding effect of the subsequent two-stage hot pressing and improves the yield.
[0020] Meanwhile, when the three upper mold bases transfer semi-finished products, the first lower mold base can simultaneously perform the slurry scooping action, which shortens the production cycle time and improves production efficiency.
[0021] (ii) Furthermore, due to the influence of gravity on the moisture content of the wet preform, the vacuum tube in the first upper mold base is less effective at removing moisture when adsorbing the wet preform. After the slurry is removed from the first lower mold base, the wet preform is vacuumed. The water in the wet preform is sequentially drawn away through the air holes, air chamber, and the second vacuum blowing pipe. Water is easily drawn away under the action of gravity, which effectively reduces the moisture content of the wet preform and improves the pre-pressing and subsequent molding effect of the wet preform. In addition, the air chamber and several air holes can generate suction evenly, avoiding damage to the semi-finished product during suction and blowing. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the formal structure of the dual-stage heating and pressurizing device for pulp according to this utility model.
[0023] Figure 2 This is an isometric view of the upper inner part of the pulp dual-stage heating and pressurizing device of this utility model.
[0024] Figure 3 This is an isometric view of the second upper mold base in the dual-stage heating and pressurizing device for pulp of this utility model.
[0025] Figure 4 This is an isometric view of the first lower mold base in the dual-stage heating and pressurizing device for pulp of this utility model.
[0026] Figure 5 This is an isometric view of the first upper die holder, the second upper die holder, and the third upper die holder in the pulp dual-stage heating and pressurizing device of this utility model.
[0027] In the picture:
[0028] 1. Frame; 11. First workstation area; 12. Second workstation area; 13. Third workstation area; 14. Fourth workstation; 15. Slide rail; 16. Slider; 17. Bearing seat; 18. Connecting block; 2. Water tank; 3. First upper mold base; 31. First vacuum blowing common pipe; 4. First lower mold base; 41. Air hole; 42. Air chamber; 421. Baffle; 43. Second vacuum blowing common pipe; 44. Guide column; 5. Second upper mold base; 51. Heating plate; 52. Heat insulation plate; 53. Forming template; 531. Forming upper template; 532. Forming lower template; 54. Vacuum pipe; 55. Blowing pipe; 56. Lifting cylinder; 6. Second lower mold base; 7. Third upper mold base; 8. Third lower mold base; 9. Horizontal moving mechanism; 91. Motor; 92. Ball screw. Detailed Implementation
[0029] The specific embodiments of this utility model are described below with reference to the accompanying drawings.
[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the device proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer according to the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, only used to conveniently and clearly assist in illustrating the purpose of the embodiments of this utility model. Please refer to the accompanying drawings to make the objectives, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only used to complement the content disclosed in the specification, for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0031] First embodiment:
[0032] A dual-stage heating and pressurizing device for pulp.
[0033] like Figure 1 As shown, the pulp dual-stage heating and pressurizing device includes a frame 1. The frame 1 has a hollow structure, and the inner side of the frame 1 is arranged sequentially along the length direction as a first working area 11, a second working area 12, a third working area 13, and a fourth working area 14.
[0034] The first workstation area 11 is equipped with a water tank 2, a first upper mold base 3, and a first lower mold base 4. The water tank 2 is located at the lower inner side of the frame 1 and contains pulp. The first upper mold base 3 is slidably mounted at the upper inner side of the frame 1. The first lower mold base 4 is configured to scoop pulp from the water tank 2 to form a wet preform and close with the first upper mold base 3 to pre-press the wet preform into a first semi-finished product. The second workstation area 12 is equipped with a second upper mold base 5 and a second lower mold base 6. The second upper mold base 5 is slidably mounted at the upper inner side of the frame 1. The second lower mold base 6 is configured to close with the second upper mold base 5 and be heated to hot-press the first semi-finished product into a second semi-finished product. The third workstation area 13 is equipped with a third upper mold base 7 and a third lower mold base 8. The third upper mold base 7 is slidably mounted at the upper inner side of the frame 1. The third lower mold base 8 is configured to close with the third upper mold base 7 and be heated to hot-press the second semi-finished product into a third semi-finished product.
[0035] like Figure 2 As shown, exemplarily, two slide rails 15 are arranged parallel to each other along the length direction on the upper inner side of the frame 1. Several pairs of sliders 16 are respectively arranged on the upper ends of the first upper mold base 3, the second upper mold base 5, and the third upper mold base 7. Each pair of sliders 16 corresponds to the position of two slide rails 15, and the sliders 16 are engaged with the slide rails 15. In other embodiments of this utility model, sliding can also be achieved by a sliding rod passing through the sliders 16. Figure 3 As shown, lifting cylinders 56 are respectively installed between the first lower die holder 4, the second lower die holder 6 and the third lower die holder 8 and the bottom inner side of the frame 1. The lifting cylinders 56 drive the piston rod to extend or retract, and the piston rod drives the first lower die holder 4, the second lower die holder 6 and the third lower die holder 8 to lift and lower, so as to realize the upper die holder and the lower die holder closing or separating, and to realize the first lower die holder 4 immersing in the pulp for pulp scooping.
[0036] like Figure 3 and Figure 4 As shown, preferably, the four corners of the first lower mold base 4, the four corners of the second lower mold base 6, and the four corners of the third lower mold base 8 slide through the guide post 44 respectively. The upper end of the guide post 44 passing through the first lower mold base 4 is fixed to the top of the inner side of the frame 1, and the lower end of the guide post 44 passing through the second lower mold base 6 and the third lower mold base 8 is fixed to the bottom of the inner side of the frame 1, so that the first lower mold base 4, the second lower mold base 6, and the third lower mold base 8 remain stable when they are raised and lowered.
[0037] like Figure 2 and Figure 5 As shown, the horizontal moving mechanism 9 is disposed within the frame 1 and configured to drive the first upper mold base 3, the second upper mold base 5, and the third upper mold base 7 to slide simultaneously along the length of the frame 1. Vacuum tubes 54 are respectively disposed at the upper ends of the first upper mold base 3, the second upper mold base 5, and the third upper mold base 7. The vacuum tubes 54 are connected to the lower surfaces of the first upper mold base 3, the second upper mold base 5, and the third upper mold base 7, respectively, and the other end of the vacuum tube is connected to a pump body. When the pump body is activated, air is drawn through the vacuum tubes to adsorb the semi-finished product, while simultaneously removing a small amount of moisture. For example, the horizontal moving mechanism 9 includes a motor 91 and a ball screw 92. The motor 91 is mounted on one side of the upper inner side of the frame 1. The first end of the ball screw 92 is connected to the output end of the motor 91, and the second end of the ball screw 92 is rotatably connected to the other side of the upper inner side of the frame 1. The first upper mold base 3, the second upper mold base 5, and the third upper mold base 7 are connected by a connecting block 18. The ball screw 92 is threadedly connected to the upper end of any one of the first upper die holder 3, the second upper die holder 5, and the third upper die holder 7. Specifically, a bearing seat 17 is mounted on the upper inner side of the frame 1, and the second end of the ball screw 92 is connected to the bearing seat 17. The ball screw 92 is threadedly connected to the upper end of the third upper die holder 7. The motor 91 drives the ball screw 92 to rotate, and the third upper die holder 7 generates threaded displacement relative to the ball screw 92, which in turn drives the first upper die holder 3 and the second upper die holder 5 to move together along the axial direction of the ball screw 92.
[0038] like Figure 3As shown, further, the first upper mold base 3, the second upper mold base 5, the second lower mold base 6, the third upper mold base 7, and the third lower mold base 8 are sequentially arranged with a forming template 53, a heat insulation plate 52, and a heating plate 51 facing the semi-finished product direction. The first lower mold base 4 includes the forming template 53. Specifically, the heating plate 51 is a heat-conducting oil heating plate 51 or an electric heating plate 51. The electric heating plate 51 is heated by a heating tube containing an electric heating wire. The forming template 53, the heat insulation plate 52, and the heating plate 51 can be installed, disassembled, and replaced as needed. Preferably, the forming template 53 also includes a lower forming template 532 and a higher forming template 531 disposed on the side of the lower forming template 532 near the semi-finished product. When a heating plate 51 is installed in the mold base, the upper forming template 531 is positioned between the lower forming template 532 and the heat insulation plate 52. To prevent heat from affecting other equipment in the mold base, for example, the upper forming template 531 in the first upper mold base 3, second upper mold base 5, second lower mold base 6, third upper mold base 7, and third lower mold base 8 uses a water-cooled plate. The water-cooled plate has pipes through which a cooling medium is introduced to remove heat. At the same time, the heat insulation plate 52 between the upper forming template 531 and the heating plate 51 can both insulate heat and not affect heating efficiency. When a heating plate 51 is not installed in the mold base, for example, the upper forming template 531 in the first lower mold base 4 does not need to use a water-cooled plate and can be used directly as a template.
[0039] In operation, this embodiment is as follows:
[0040] Lifting cylinder 56 lowers the first lower die base 4 into the pulp in the water tank 2 and then rises again to scoop out the pulp and form a wet blank. Lifting cylinder 56 raises the first lower die base 4, which closes with the first upper die base 3 to pre-press the wet blank into a first semi-finished product. The vacuum tube 54 of the first upper die base 3 draws air to absorb the first semi-finished product. At the same time, lifting cylinder 56 raises the second lower die base 6, which closes with the second upper die base 5 to heat and press the first semi-finished product at the second station 12 to obtain a second semi-finished product. The vacuum tube 54 of the second upper die base 5 draws air to absorb the second semi-finished product. At the same time, lifting cylinder 56 raises the third lower die base 8, which closes with the third upper die base 7 to heat and press the second semi-finished product at the third station 13 to obtain a third semi-finished product. The vacuum tube 54 of the third upper die base 7 draws air to absorb the third semi-finished product.
[0041] The horizontal moving mechanism 9 drives the first upper die holder 3, the second upper die holder 5, and the third upper die holder 7 to move simultaneously to the next station. The lifting cylinder 56 drives the first lower die holder 4 to descend into the pulp in the water tank 2 and then rises again to scoop out the pulp and form a wet blank. The lifting cylinder 56 drives the second lower die holder 6 and the third lower die holder 8 to rise and close the molds respectively. The vacuum tubes 54 of the first upper die holder 3, the second upper die holder 5, and the third upper die holder 7 are de-vacuumed, allowing the first semi-finished product to fall into the second lower die holder 6, the second semi-finished product to fall into the third lower die holder 8, and the third semi-finished product to fall onto the platform of the fourth station 14 for stacking, completing the material transfer. The horizontal moving mechanism 9 drives the first upper die holder 3, the second upper die holder 5, and the third upper die holder 7 to move simultaneously back to the initial station. The above actions are repeated.
[0042] In this embodiment, by setting four workstations in the frame 1, the upper mold base and the lower mold base in the first three workstations respectively perform cold pre-pressing and two-stage hot pressing on the pulp. After cold pre-pressing, the moisture content in the wet preform is significantly reduced, which improves the molding effect of the subsequent two-stage hot pressing and increases the yield.
[0043] Meanwhile, when the three upper mold bases transfer semi-finished products, the first lower mold base 4 can simultaneously perform the slurry scooping action, which shortens the production cycle time and improves production efficiency.
[0044] Second embodiment:
[0045] Based on the first embodiment, the second embodiment further optimizes and refines the first embodiment.
[0046] like Figure 4 As shown, several air holes 41 are opened on the upper surface of the first lower mold base 4, an air chamber 42 is opened inside the first lower mold base 4, and a second vacuum blowing pipe 43 is provided at the lower end of the first lower mold base 4. The air holes 41, the air chamber 42 and the second vacuum blowing pipe 43 are connected in sequence.
[0047] like Figure 4 As shown, further, a baffle 421 is provided at the upper end of the second vacuum blowing pipe 43 inside the air chamber 42 to prevent water from being blown directly onto the product during blowing, thus preventing secondary pollution and further improving the product yield.
[0048] like Figure 5As shown, furthermore, the first upper mold base 3 shares the same pipe for both air blowing and vacuuming, and its vacuum pipe 54 is the first vacuum blowing pipe 31. The first upper mold base 3, the second upper mold base 5, the second lower mold base 6, the third upper mold base 7, and the third lower mold base 8 have air chambers 42. Several air holes 41 are opened on the surface of the first upper mold base 3, the second upper mold base 5, the second lower mold base 6, the third upper mold base 7, and the third lower mold base 8 near the semi-finished product. Vacuum pipes 54 are respectively installed at the lower end of the second lower mold base 6 and the lower end of the third lower mold base 8. The air holes 41, air chambers 42, and vacuum pipes 54 in the same mold base are connected in sequence. Air blowing pipes 55 are respectively installed at the upper end of the second upper mold base 5, the lower end of the second lower mold base 6, the upper end of the third upper mold base 7, and the lower end of the third lower mold base 8. The air holes 41, air chambers 42, and air blowing pipes 55 in the same mold base are connected in sequence. The other ends of the vacuum tube 54 and the air blowing tube 55 are connected to the pump body, respectively. In the first upper mold base 3, the second upper mold base 5, the second lower mold base 6, the third upper mold base 7, and the third lower mold base 8, the vacuum tube 54 mainly serves to adsorb the semi-finished product and also helps to remove some moisture from it. The air blowing tube 55 mainly serves to release the adsorption on the semi-finished product and prevent it from getting stuck on the mold base or adhering to it at high temperatures. In the second upper mold base 5, the second lower mold base 6, the third upper mold base 7, and the third lower mold base 8, the vacuum tube 54 and the air blowing tube 55 are set separately to ensure that condensate in the vacuum tube 54 will not be blown into the semi-finished product, causing secondary contamination and further improving product yield.
[0049] In this embodiment, due to the influence of gravity on the moisture content in the wet preform, the vacuum tube 54 in the first upper mold base 3 has a poor effect on removing moisture when adsorbing the wet preform. After the first lower mold base 4 scoops the slurry, it evacuates the wet preform. The water in the wet preform is sequentially drawn away through the air hole 41, the air chamber 42, and the second vacuum blowing pipe 43. The water is easily drawn away under the action of gravity, which has a good effect on reducing the moisture content of the wet preform and improving the pre-pressing and subsequent molding effect of the wet preform. In addition, the air chamber 42 and several air holes 41 can generate suction evenly, avoiding damage to the semi-finished product during suction and blowing.
[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0051] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A two-stage heating and pressurizing device for pulp, characterized in that, The pulp dual-stage heating and pressurizing device includes: The frame is a hollow structure, and the inner side of the frame is provided with a first work station area, a second work station area, a third work station area and a fourth work station area in sequence along the length direction; The first work station area is provided with a water tank, a first upper mold base and a first lower mold base. The water tank is located at the lower end of the inner side of the frame and contains pulp. The first upper mold base is slidably located at the upper end of the inner side of the frame. The first lower mold base is configured to scoop up pulp from the water tank to form a wet blank and close the mold with the first upper mold base to pre-press the wet blank to form a first semi-finished product. The second work station area is provided with a second upper mold base and a second lower mold base. The second upper mold base is slidably disposed on the upper inner side of the frame. The second lower mold base is configured to close the mold with the second upper mold base and be heated to hot press the first semi-finished product to form the second semi-finished product. The third work station area is provided with a third upper mold base and a third lower mold base. The third upper mold base is slidably disposed on the upper inner side of the frame. The third lower mold base is configured to close the mold with the third upper mold base and be heated to hot press the second semi-finished product to form the third semi-finished product. A horizontal moving mechanism is disposed within the frame and configured to drive the first upper mold base, the second upper mold base, and the third upper mold base to slide simultaneously along the length direction of the frame. Vacuum tubes are respectively disposed at the upper ends of the first upper mold base, the second upper mold base, and the third upper mold base, and the vacuum tubes are respectively connected to the lower end surfaces of the first upper mold base, the second upper mold base, and the third upper mold base.
2. The pulp dual-stage heating and pressurizing device according to claim 1, characterized in that: A plurality of air holes are formed on the upper surface of the first lower mold base, an air chamber is formed inside the first lower mold base, and a second vacuum blowing pipe is provided at the lower end of the first lower mold base. The air holes, the air chamber, and the second vacuum blowing pipe are connected in sequence.
3. The pulp dual-stage heating and pressurizing device according to claim 2, characterized in that: A baffle is installed in the air chamber at the upper end of the second vacuum blowing pipe.
4. The pulp dual-stage heating and pressurizing device according to claim 1, characterized in that: The horizontal moving mechanism includes a motor and a ball screw. The motor is mounted on one side of the upper inner side of the frame. The first end of the ball screw is connected to the output end of the motor, and the second end of the ball screw is rotatably connected to the other side of the upper inner side of the frame. The first upper die holder, the second upper die holder, and the third upper die holder are connected by a connecting block. The ball screw is threaded to the upper end of any one of the first upper die holder, the second upper die holder, and the third upper die holder.
5. The pulp dual-stage heating and pressurizing device according to claim 1, characterized in that: The first upper mold base, the second upper mold base, the second lower mold base, the third upper mold base, and the third lower mold base are arranged sequentially with a forming template, a heat insulation plate, and a heating plate facing the semi-finished product direction. The first lower mold base includes a forming template.
6. The pulp dual-stage heating and pressurizing device according to claim 5, characterized in that: The molding template further includes a lower molding template and an upper molding template disposed on the side of the lower molding template near the semi-finished product. The upper molding template in the first upper mold base, the second upper mold base, the second lower mold base, the third upper mold base, and the third lower mold base is a water-cooled plate.
7. The pulp dual-stage heating and pressurizing device according to claim 1, characterized in that: The first upper mold base, the second upper mold base, the second lower mold base, the third upper mold base, and the third lower mold base each have an air chamber. The first upper mold base, the second upper mold base, the second lower mold base, the third upper mold base, and the third lower mold base each have several air holes on their surfaces near the semi-finished product. Vacuum tubes are respectively installed at the lower ends of the second lower mold base and the third lower mold base. The air holes, air chambers, and vacuum tubes in the same mold base are connected in sequence. Air blowing pipes are respectively installed at the upper ends of the second upper mold base, the lower ends of the second lower mold base, the upper ends of the third upper mold base, and the lower ends of the third lower mold base. The air holes, air chambers, and air blowing pipes in the same mold base are connected in sequence.
8. The pulp dual-stage heating and pressurizing device according to claim 1, characterized in that: Two slide rails are arranged parallel to each other along the length of the upper inner side of the frame. Several pairs of sliders are respectively arranged on the upper ends of the first upper mold base, the second upper mold base and the third upper mold base, and the sliders are engaged with the slide rails.
9. The pulp dual-stage heating and pressurizing device according to claim 1, characterized in that: Lifting cylinders are respectively installed between the first lower mold base, the second lower mold base and the bottom inner side of the machine frame.
10. The pulp dual-stage heating and pressurizing device according to claim 9, characterized in that: The four corners of the first lower mold base, the four corners of the second lower mold base, and the four corners of the third lower mold base slide through the guide post respectively. The upper end of the guide post passing through the first lower mold base is fixed to the top of the inner side of the frame, and the lower end of the guide post passing through the second and third lower mold bases is fixed to the bottom of the inner side of the frame.