A device for direct hot pressing molding of pulp rolls

Abstract

The invention discloses a device for direct hot-pressing molding of pulp rolls, which relates to the field of paper material manufacturing. In this scheme, a cutting area is reserved on the surface layer, and a vibration seat of a mold core assembly is used to cover the cutting surface with the surface layer, so as to solve the problems of exposed fiber burrs, loose structure and moisture pollution caused by the exposed cutting surface. The folded and covered surface layer provides lateral limiting force during the hot-pressing process, enhances the compactness at the edge, and avoids the looseness of the middle cutting surface. At the same time, the axial friction force generated by the reciprocating motion of the vibration seat further ensures that the surface layer and the cutting surface are in stable contact, material rebound and loose covering are prevented, and inter-layer slippage is prevented. The vibration seat slides and hits the buffer pad to generate an instantaneous impact force. This design strengthens the pressing effect of the surface layer during the hot-pressing process, makes the cutting surface tighter and smoother, reduces the occurrence of loose fibers and tiny gaps, and improves the edge sealing quality. It not only improves the cutting surface protection effect, but also improves the bonding strength between the surface layer and the pulp.

Description

Technical Field

[0001] The invention relates to the field of paper stock manufacturing, in particular to equipment for direct hot pressing molding of pulp rolls. Background Art

[0002] At present, the production equipment and technology of the pulp molding industry are as follows: wet pressing technology and equipment: pulping - molding - vacuum pumping - hot pressing - trimming - finished product; pulping system equipment, molding equipment, vacuum equipment, hot pressing equipment, trimming equipment dry pressing technology and equipment: pulping - molding - vacuum pumping - drying (air drying) - hot pressing - trimming - finished product; pulping equipment, molding equipment, vacuum equipment, drying system equipment (manual or drying room equipment), hot pressing equipment, trimming equipment wet dry pressing technology and equipment: flat pulp board - hot pressing - trimming - finished product. For pulp molding product manufacturers, the above process is time-consuming, labor-intensive, energy-intensive, inefficient and costly to purchase pulp boards and then go through the steps of crushing, pulping, molding and drying.

[0003] At present, in the hot pressing die-cutting process of pulp rolls, hot pressing is basically performed after cutting or cutting is performed during hot pressing. In this process, the pulp layer on the cut surface is directly exposed outside the surface layer. The cut surface of the pulp roll without surface layer coverage may be easily damaged during use after hot pressing, and the durability may be reduced. The exposed fiber edges of the cut surface affect the appearance, and even become loose. In addition, the cut surface is easily affected by moisture or contamination in subsequent use. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the cutting surface has no surface layer covering protection during the traditional pulp roll hot pressing die cutting process, and to propose a pulp roll direct hot pressing molding device.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: comprising a hot pressing molding device, the hot pressing molding device comprising a hot pressing cutting machine, the hot pressing cutting machine further comprising:

[0006] The main hot pressing module includes a holding assembly that provides a separate holding force and two hydraulic rods and a vibration force, one side of the holding assembly is provided with a movable mold and a vibration plate, and a plurality of mold core assemblies are installed on the surface together, when the hydraulic rod applies pressure to the movable mold through the holding assembly, the holding assembly applies axial reciprocating vibration to the mold core assembly through the vibration plate;

[0007] A plurality of surface layer cutters for cutting the surface layer of the pulp roll are arranged on one side of the main hot pressing module;

[0008] The auxiliary hot-pressing module is symmetrically arranged on one side of the main hot-pressing module, and cooperates with the main hot-pressing module to complete the hot-pressing operation on the other side of the pulp roll, and the auxiliary hot-pressing module also serves as the discharging side;

[0009] A plurality of mold-closing cooperative components are located between the main hot-pressing module and the auxiliary hot-pressing module. When the main hot-pressing module is driven by hydraulic pressure, the hydraulic pressure is fed back to drive the auxiliary hot-pressing module to close the mold.

[0010] The reference frame is located between the main hot pressing module and the auxiliary hot pressing module, with one side attached to the pulp roll, and is used for positioning the mold closing and hot pressing;

[0011] During the hot pressing process of mold closing, the surface layer cutter cuts the reserved area of ​​the surface layer of the pulp roll, the mold core assembly separates the surface layer from the fluffy layer, and makes the surface layer adhere to the fracture surface of the pulp layer under the action of extrusion to form a hot pressing die-cutting area. Under the action of continuous hydraulic pressure, the mold core assembly provides axial vibration force through the holding assembly to hammer the pulp layer. At the same time, during the reciprocating vibration process, the surface layer area of ​​the fracture surface is subjected to extrusion friction.

[0012] As a further description of the above technical solution: the main hot pressing module also includes an upper die seat, the hydraulic rod is fixed through the surface of the upper die seat, and the telescopic ends of the two hydraulic rods are fixed together on one side of the pressing assembly;

[0013] A sleeve frame is slidably attached to the surface of the movable mold, and elastic parts are installed at the four corners of the sleeve frame and the movable mold. A clamping plate is fixed on one side of the sleeve frame, and the surface layer cutter is installed on one side of the clamping plate.

[0014] As a further description of the above technical solution: the pressing assembly includes a pressing seat fixed to one end of two hydraulic rods, the pressing seat penetrates and slides on one side of the vibration plate, the pressing seat is fixed to the inner wall of the movable mold, a plurality of slide grooves are opened on the pressing seat, a slide slides in two symmetrical slide grooves on the same side, and a return spring supporting the slide is arranged on the inner wall of the slide groove;

[0015] The pressing assembly also includes an eccentric disk which is limited and rotated on the inner wall of the pressure seat. A driver for driving the eccentric disk to rotate is installed on the surface of the pressure seat. The surface of the eccentric disk is movably connected to a connecting rod via a pin shaft. The other end of the connecting rod is movably connected to a connecting seat via a pin shaft. The inner wall of the connecting seat is rotatably connected to a support column. Both ends of the support column are fixed to the opposite surfaces of two slides. A rotation node is provided in the middle section of the connecting rod.

[0016] As a further description of the above technical solution: the mold core assembly includes a mold core seat penetrating the surface of the movable mold, the inner wall of the mold core seat is fitted and slid with a vibration seat, the inner wall of the vibration seat is fitted and slid with a first mold core, a plurality of support blocks penetrating the vibration seat are fixed on the surface of the first mold core, and the end surface of the vibration seat is arranged in an arc surface;

[0017] A wiring tube is arranged on one side of the first mold core, one end of the vibration seat is penetrated and fixed on the vibration plate, and a buffer pad is arranged on one end of the support block close to the first mold core.

[0018] As a further description of the above technical solution: the auxiliary hot pressing module includes a lower mold base, a fixed mold is slidably arranged on one side of the lower mold base, and a plurality of ejection components cooperating with the first mold core are installed on the fixed mold, and the surface of the movable mold and the lower mold base are jointly provided with a locking component for positioning the movable mold.

[0019] As a further description of the above technical solution: the locking assembly includes a clamping column fixed to the movable mold and sliding through one side of the lower mold base, and also includes a groove opened on the surface of the lower mold base, a pin plate slides on the inner wall of the groove, and a telescopic cylinder for controlling the reciprocating motion of the pin plate is installed in the groove, and the arc-shaped side wall of the clamping column is provided with a pin hole for positioning with the pin plate;

[0020] When the fixed mold slides to a predetermined position with the clamping column, the telescopic cylinder controls the pin plate to slide into the pin hole, and supports the clamping column and the fixed mold to be locked at the predetermined position.

[0021] As a further description of the above technical solution: the ejector assembly includes a second mold core arranged on one side of the fixed mold, an ejector rod is slidably penetrated through the second mold core, and an ejector spring is fixed to the ejector rod and the inner wall of the fixed mold;

[0022] When the fixed mold is reset, the ejector rod contacts the lower mold base and compresses the ejector spring to eject the material; when the mold is closed, the spring resets the ejector rod.

[0023] As a further description of the above technical solution: the mold-closing cooperative assembly includes a gear seat fixed on the surface of the lower mold seat, a synchronous gear is installed on the gear seat, and a first rack fixed on the fixed mold and a second rack fixed on the sleeve are meshed on the surface of the synchronous gear;

[0024] When the movable mold moves, elastic pressure is applied to the sleeve frame through the elastic member, and the elastic pressure drives the second rack and the first rack to move toward each other under the action of the synchronous gear, driving the fixed mold to move to one side of the reference frame for fitting.

[0025] As a further description of the above technical solution: stroke columns for supporting the sliding of the fixed mold and the clamping plate are fixed at the four corners of the opposite surfaces of the upper mold base and the lower mold base, and the reference frame is fixed on the surface of the stroke columns.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] When in use, the present solution reserves a certain distance for cutting the surface layer in the reserved area of ​​the surface layer through a surface layer cutter, and folds the surface layer within the reserved distance through the vibration seat of the mold core assembly and applies pressure to cover the cutting surface, thereby effectively avoiding multiple problems caused by the exposed cutting surface. This method can adapt to the full coverage of the cutting surface of hot-pressed finished products of a certain thickness.

[0028] The folded and covered surface layer provides lateral limiting force during the hot pressing process, and applies a certain pressure to the inner extrusion area away from the extrusion fracture area, so that the tightness of the edges during the hot pressing process is guaranteed, avoiding the looseness of the compacted cutting surface in the middle. During the hot pressing process, the inner wall of the vibration seat that axially reciprocates and vibrates repeatedly rubs against the surface layer of the cutting surface under the extrusion state, ensuring that the cutting surface and the surface layer can fit stably, avoiding loose coverage caused by uneven pressure or material rebound. At the same time, the presence of the folded surface layer also increases the friction between the upper and lower surfaces of the cutting surface, which helps to prevent inter-layer slippage in subsequent use, and the surface layer of the cutting surface is more closely bonded to the pulp layer, further improving the overall structural strength and stability of the product. This design not only improves the protection effect of the cutting surface, but also improves the appearance consistency and durability of the product, and is suitable for high-demand product production needs;

[0029] At the same time, when the vibration seat reciprocates in the axial direction, its hydraulic pressure acts on the second mold core. During the mutual extrusion and heating process of the second mold core, the vibration seat slides on the surface of the support block and hits the buffer pad, which applies an instantaneous impact force to the first mold core. The instantaneous impact force enhances the hot pressing effect, helps the surface layer to fit the cutting surface more closely, and improves the edge sealing effect. It reduces the tiny gaps or loose fibers that may appear on the cutting surface. It is beneficial to optimize the bonding strength between the surface layer and the pulp, and ensure the durability and anti-peeling performance of the product in subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the principle of the direct hot compression molding equipment embodiment 1 of the present invention;

[0031] Figure 2 It is a three-dimensional schematic diagram of the hot pressing cutting machine of the present invention;

[0032] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the hot pressing cutting machine of the present invention;

[0033] Figure 4 It is a cross-sectional schematic diagram of the hot pressing cutting machine of the present invention;

[0034] Figure 5 It is a three-dimensional schematic diagram of the main hot pressing die of the hot pressing cutting machine of the present invention;

[0035] Figure 6 It is a three-dimensional schematic diagram of the pressing and holding assembly of the hot pressing cutting machine of the present invention;

[0036] Figure 7 It is a three-dimensional cross-sectional schematic diagram of the pressing and holding assembly of the hot pressing cutting machine of the present invention;

[0037] Figure 8 It is a three-dimensional cross-sectional schematic diagram of a mold core assembly of the hot pressing cutting machine of the present invention;

[0038] Fig. 9 It is a three-dimensional schematic diagram of the auxiliary hot pressing module of the hot pressing cutting machine of the present invention;

[0039] Fig.10 It is a three-dimensional cross-sectional schematic diagram of the auxiliary hot pressing module of the hot pressing cutting machine of the present invention;

[0040] Fig.11 It is a partial three-dimensional schematic diagram of the mold-closing cooperative component of the hot pressing and cutting machine of the present invention;

[0041] Fig.12 The present invention is attached Figure 4 A magnified schematic diagram of the local area at P in the middle;

[0042] Fig.13 It is a schematic diagram of the explosion of the hot pressing cutting machine of the present invention;

[0043] Fig.14 Schematic diagram of three states of the mold closing process of the hot pressing cutting machine of the present invention;

[0044] Fig.15 It is a schematic diagram of the hot pressing cutting principle of the present invention;

[0045] Fig.16 It is a schematic diagram of the principle of embodiment 2 of the direct hot compression molding equipment of the present invention.

[0046] Legend:

[0047] 01, feeding roller; 02, surface material roller; 03, first pressing piece; 04, conveyor; 05, sprayer; 06, second pressing piece; 07, feeding buffer;

[0048] 08. Hot pressing cutting machine;

[0049] 10. Main hot pressing module; 11. Hydraulic rod; 12. Pressing assembly; 121. Pressing seat; 122. Driver; 123. Eccentric disk; 124. Connecting rod; 125. Connecting seat; 126. Support column; 127. Slide; 128. Return spring; 129. Slide; 13. Moving mold; 14. Vibrating plate; 15. Mold core assembly; 151. Mold core seat; 152. Support block; 153. First mold core; 154. Vibrating seat; 155. Wire guide tube; 16. Sleeve frame; 17. Clamp; 18. Upper mold seat; 19. Elastic member;

[0050] 20. Auxiliary hot pressing module; 21. Lower die base; 22. Fixed die; 23. Ejector assembly; 231. Second die core; 232. Ejector rod; 233. Ejector spring; 24. Locking assembly; 241. Groove; 242. Pin plate; 243. Telescopic cylinder; 244. Clamping column; 245. Pin hole;

[0051] 30. mold-closing cooperative component; 31. gear seat; 32. synchronous gear; 33. first rack; 34. second rack;

[0052] 40. Reference frame; 50. Surface layer cutter; 60. Travel column;

[0053] 09. Crusher; 010. Conveyor; 011. Grinding machine;

[0054] p1, feeding assembly; p2, recoil belt assembly; p3, length compensation assembly; p4, flattening equipment; P5, unloading assembly; p6, post-processing assembly;

[0055] a, inner extrusion area; b, outer extrusion area; c, extrusion fracture area. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] Embodiment 1: Figure 1 - Fig.15 As shown, the present invention provides: a device for direct hot pressing molding of pulp rolls, including hot pressing molding equipment, the hot pressing molding equipment including a feeding component p1, wherein a recoil belt component p2 is arranged on the output side of the feeding component p1, when the feeding component p1 is replaced, the recoil belt component p2 can continuously keep the pulp roll conveying for a period of time, and one end of the pulp roll can be stationary, so as to facilitate the replacement of the feeding component p1, wherein a length compensation component p3 is arranged on the outer side of the recoil belt component p2, and the length compensation component p3 can be unable to be transmitted during subsequent processing, and the front side is still in a conveying state, so as to keep the length of the pulp roll, and after the flattening device p4 pre-presses the pulp roll, it enters the hot pressing cutting for hot pressing molding, and after the hot pressing molding, the product can be taken out by the unloading component P5, and the unloading component P5 includes a variety of methods, preferably a combination of a vacuum suction cup and a mechanical arm, and then the product is subjected to the trimming treatment of the post-processing component p6 to complete the production.

[0058] The above method has simple process and low cost, and the hot pressing cutting machine is installed horizontally to meet the layout requirements of production.

[0059] Embodiment 2: The above provides an overall principle overview of a pulp roll direct hot pressing molding device. The following is another scheme of a pulp roll direct hot pressing molding device in combination with another use of the hot pressing cutter:

[0060] The hot pressing molding equipment includes a feeding roller 01 and a surface material roller 02, between which a grinder 011 is arranged for covering the surface of the pulp layer with a fluffy layer, a first pressing member 03 and a conveyor 04 for initially applying pressure to the fluffy layer and the pulp roll are arranged below the grinder 011, a sprayer 05 for humidifying the pulp roll is arranged on one side of the conveyor 04, a second pressing member 06 for secondary pressure on the pulp roll and the surface layer is arranged below the sprayer 05, a hot pressing cutter 08 and a crusher 09 for crushing waste materials are arranged below the second pressing member 06, a conveyor 010 connected to the grinder 011 is arranged on one side of the crusher 09, and a feeding buffer 07 for controlling the length of the pulp roll is arranged above the hot pressing cutter 08.

[0061] The feeding roller 01 transfers the surface pulp layer on the surface of the conveyor 04. During the process, the grinder 011 grinds the waste material and evenly lays it on the surface of the pulp layer. Then, the first pressing piece 03 on the surface of the conveyor 04 performs the initial extrusion during the transmission process, and the reagent is sprayed into it through the sprayer 05 during the subsequent transmission process to moisten it. After moisturizing, one or both sides of it are attached to the surface layer. After being attached to the surface layer, it is subjected to secondary extrusion through the second pressing piece 06 to shape it as a whole. After shaping, it can be transferred to the hot pressing cutting machine 08 for hot pressing molding, and the cut waste material enters the crusher 09, and after being crushed to a suitable size, it can enter the conveyor 010, and the crushed waste material is recycled to the grinder 011 through the conveyor 010, and the fluffy layer can be laid after grinding;

[0062] During the hot pressing process, the length of the continuously transported pulp roll changes through the feeding buffer 07, so that it can be bent and folded to a certain extent, and reset after the hot pressing is completed, and the non-hot pressing area of ​​the pulp roll can be quickly moved to the hot pressing cutting machine 08;

[0063] Two embodiments are given above;

[0064] Comparing the above two implementations, the current production equipment and process of the pulp molding industry are as follows:

[0065] Wet pressing process and equipment: beating - forming - vacuum pumping - hot pressing - trimming - finished product;

[0066] Pulping system equipment, molding equipment, vacuum equipment, hot pressing equipment, trimming equipment.

[0067] Dry pressing process and equipment: beating - forming - vacuum pumping - drying (air drying) - hot pressing - trimming - finished product;

[0068] Pulping equipment, forming equipment, vacuum equipment, drying system equipment (manual or drying room equipment), hot pressing equipment, trimming equipment.

[0069] Wet-dry pressing process and equipment: flat pulp board - hot pressing - trimming - finished product

[0070] In the above-mentioned production equipment and process of the current pulp molding industry, for pulp molding product manufacturers, after purchasing the pulp board, they need to go through the steps of crushing, slurry mixing, molding and drying, which is time-consuming, labor-intensive, energy-intensive, low-efficiency and high-cost.

[0071] This solution can solve the shortcomings of the above existing processes. The paddle roll containing water is hot-pressed and molded. Since the procedures of beating, molding, and vacuum pumping are omitted, it has multiple effects in reducing energy consumption, production efficiency, and carbon emissions. It has the advantages of low energy consumption and high efficiency.

[0072] In Example 1, the finished pulp roll is directly processed, while in Example 2, the pulp roll needs to be further processed, and more specifically:

[0073] In terms of energy consumption, the traditional method requires energy for the additional beating, molding, vacuuming and drying compared to the present invention. In addition, the moisture content of the same hot-pressed product is 65% to 70%, while the moisture content of the hot-pressed product of the present invention is 15% to 35%, so the energy consumption is lower.

[0074] In terms of efficiency, the traditional method greatly improves production efficiency by reducing the number of steps (no pulping, etc.) and the low moisture content of the hot-pressed products.

[0075] Hot pressing cutting machine 08 also includes:

[0076] Specifically, Figure 3 As shown: the main hot pressing module 10 includes a separation holding force and two hydraulic rods 11 for providing pressure and a holding assembly 12 for vibration force. A movable mold 13 and a vibration plate 14 are arranged on one side of the holding assembly 12, and a plurality of mold core assemblies 15 are installed on the surface. When the hydraulic rod 11 applies pressure to the movable mold 13 through the holding assembly 12, the holding assembly 12 applies axial reciprocating vibration to the mold core assembly 15 through the vibration plate 14.

[0077] The main hot pressing module 10 also includes an upper die base 18, a hydraulic rod 11 is fixed through the surface of the upper die base 18, and the telescopic ends of the two hydraulic rods 11 are fixed together on one side of the pressing assembly 12;

[0078] A sleeve frame 16 is slidably attached to the surface of the movable mold 13 , and elastic members 19 are installed at the four corners of the sleeve frame 16 and the movable mold 13 . A clamping plate 17 is fixed to one side of the sleeve frame 16 , and a surface layer cutter 50 is installed on one side of the clamping plate 17 .

[0079] By setting up the hot pressing cutting machine 08, the pulp roll can be cut during the hot pressing process, which greatly improves the efficiency and optimizes the production steps.

[0080] A plurality of surface layer cutters 50 for cutting the surface layer of the pulp roll are arranged on one side of the main hot pressing module 10;

[0081] The length of the surface layer cutter 50 is not enough to effectively cut the pulp layer. It can only cut the surface layer under sufficient pressure and embed into the pulp layer, so as to cooperate with clamping and positioning while cutting.

[0082] The auxiliary hot-pressing module 20 is symmetrically arranged on one side of the main hot-pressing module 10, and cooperates with the main hot-pressing module 10 to complete the hot-pressing operation on the other side of the pulp roll, and the auxiliary hot-pressing module 20 also serves as the discharging side;

[0083] A plurality of mold-closing cooperative components 30 are located between the main hot-pressing module 10 and the auxiliary hot-pressing module 20. When the main hot-pressing module 10 is driven by hydraulic pressure, the hydraulic pressure is fed back to drive the auxiliary hot-pressing module 20 to close the mold;

[0084] The reference frame 40 is located between the main hot pressing module 10 and the auxiliary hot pressing module 20, with one side of the reference frame being attached to the pulp roll and used for positioning the mold closing and hot pressing;

[0085] During the hot pressing process of mold closing, the surface layer cutter 50 cuts the reserved area of ​​the surface layer of the pulp roll, and the mold core assembly 15 separates the surface layer from the fluffy layer, and makes the surface layer adhere to the fracture surface of the pulp layer under the action of extrusion to form a hot pressing die cutting area. Under the action of continuous hydraulic pressure, the mold core assembly 15 provides axial vibration force through the holding assembly 12 to hammer the pulp layer. At the same time, during the reciprocating vibration process, the surface layer area of ​​the fracture surface is subjected to extrusion friction.

[0086] Specifically, Figure 6 and Figure 7 As shown, the pressing assembly 12 includes a pressing seat 121 fixed to one end of the two hydraulic rods 11, the pressing seat 121 penetrates and slides on one side of the vibration plate 14, the pressing seat 121 is fixed to the inner wall of the movable mold 13, a plurality of slide grooves 129 are provided on the pressing seat 121, a slide 127 slides in two symmetrical slide grooves 129 on the same side, and a return spring 128 supporting the slide 127 is provided on the inner wall of the slide groove 129;

[0087] The pressing assembly 12 also includes an eccentric disk 123 which is limited and rotated on the inner wall of the pressing seat 121. A driver 122 for driving the eccentric disk 123 to rotate is installed on the surface of the pressing seat 121. The surface of the eccentric disk 123 is movably connected to a connecting rod 124 through a pin shaft. The other end of the connecting rod 124 is movably connected to a connecting seat 125 through a pin shaft. The inner wall of the connecting seat 125 is rotatably connected to a support column 126. Both ends of the support column 126 are fixed on the opposite surfaces of two slides 127. A rotation node is set in the middle section of the connecting rod 124.

[0088] The pressing seat 121 of the pressing assembly 12 can transmit hydraulic pressure to the movable mold 13, and at the same time can generate axial reciprocating vibration force, and drive the eccentric disk 123 to rotate on the inner wall of the pressing seat 121 through the driver 122. The eccentric disk 123 moves with one end of the connecting rod 124 under the support and sliding of the pressing seat 121, wherein the middle section of the connecting rod 124 is rotatable, so that the eccentric disk 123 and the connecting seat 125 connected by the pins at both ends can realize multiple directions of movement. When the eccentric disk 123 rotates to the proximal end, the connecting rod 124 The vibration plate 14 is pressed and held. When the eccentric disk 123 rotates to move one end of the connecting rod 124 to the far end, the connecting rod 124 is pulled, and the connecting rod 124 slides in the slide groove 129 through the push-pull slide 127, and the slide 127 can move synchronously with the vibration plate 14, so that the vibration plate 14 is subjected to tension, so that the eccentric disk 123 is rotated by the driver 122, and can continuously push and pull the vibration plate 14, and the vibration plate 14 can carry the vibration seat 154 to perform a small reciprocating motion, and form a reciprocating vibration after reaching a certain speed.

[0089] When the slide 127 moves, the return spring 128 generates a return elastic force on the slide 127. When the driver 122 stops, the return spring 128 can return the slide 127 to a predetermined position, so that the vibration plate 14 and the vibration seat 154 are reset to meet the needs of subsequent cutting of the vibration seat 154.

[0090] Specifically, Figure 8 As shown, the mold core assembly 15 includes a mold core seat 151 penetrating the surface of the movable mold 13, a vibration seat 154 is slidably fitted on the inner wall of the mold core seat 151, a first mold core 153 is slidably fitted on the inner wall of the vibration seat 154, a plurality of support blocks 152 penetrating the vibration seat 154 are fixed on the surface of the first mold core 153, and the end surface of the vibration seat 154 is arranged in an arc surface;

[0091] A wiring tube 155 is disposed on one side of the first mold core 153 , one end of the vibration seat 154 penetrates and is fixed on the vibration plate 14 , and a buffer pad is disposed on one end of the support block 152 close to the first mold core 153 .

[0092] The mold core seat 151 is fixed to the fixed mold 22 so that it can play a supporting role. The support block 152 on its inner wall keeps transmitting force and directly acts on the first mold core 153 to apply the liquid pressure of mold closing. The distance of the support block 152 can meet the activity range requirement of the vibration seat 154, and when the vibration seat 154 reciprocates, it can unload part of the impact force and transfer it to the first mold core 153 under the action of the buffer pad. The effect of ensuring the quality of hot pressing is achieved through the combination of the liquid pressure of mold closing and the impact force of vibration.

[0093] The end face (cutting face) of the vibration seat 154 is arranged in an arc shape, so that a thick pulp layer can be squeezed and broken under the squeezing force, and at the same time, the cut surface layer can slide smoothly on the surface and move.

[0094] Specifically, Fig. 9 and Fig.10 As shown: the auxiliary hot pressing module 20 includes a lower mold base 21, a fixed mold 22 is slidably arranged on one side of the lower mold base 21, and a plurality of ejection components 23 cooperating with the first mold core 153 are installed on the fixed mold 22, and a locking component 24 for positioning the position of the movable mold 13 is jointly arranged on the surface of the movable mold 13 and the lower mold base 21.

[0095] The locking assembly 24 includes a clamping column 244 fixed to the movable mold 13 and sliding through one side of the lower mold base 21, and also includes a groove 241 opened on the surface of the lower mold base 21, a pin plate 242 slides on the inner wall of the groove 241, and a telescopic cylinder 243 for controlling the reciprocating motion of the pin plate 242 is installed in the groove 241, and a pin hole 245 for cooperating with the pin plate 242 for positioning is opened on the arc-shaped side wall of the clamping column 244;

[0096] When the fixed mold 22 slides to a predetermined position with the clamping column 244, the telescopic cylinder 243 controls the pin plate 242 to slide into the pin hole 245, and supports the clamping column 244 and the fixed mold 22 to be locked at the predetermined position.

[0097] By setting up the auxiliary hot pressing module 20, when the fixed mold 22 moves with the mold closing cooperative assembly 30, the clamping column 244 on its surface slides on the inner wall of the lower mold base 21 to maintain support. When the clamping column 244 moves to a suitable position, the telescopic cylinder 243 is started and the pin plate 242 is clamped into the small hole opened on the side wall of the clamping column 244 to achieve position locking of the fixed mold 22.

[0098] Specifically, Figure 3 and Fig.12 As shown: the ejection assembly 23 includes a second mold core 231 disposed on one side of the fixed mold 22, an ejection rod 232 slides through the second mold core 231, and an ejection spring 233 is fixed to the ejection rod 232 and the inner wall of the fixed mold 22;

[0099] When the fixed mold 22 is reset, the ejector rod 232 contacts the lower mold base 21 and compresses the ejector spring 233 to eject the material; when the mold is closed, the spring resets the ejector rod 232.

[0100] The ejector assembly 23 includes a second mold core 231, wherein the second mold core 231 is replaceable and can be replaced and installed when needed. When the mold is opened, as the locking assembly 24 slides the pin plate 242 out of the pin hole 245 to release the locking state, the fixed mold 22 starts to reset and move. After moving to a suitable position, the ejector rod 232 contacts the lower mold base 21 and compresses the ejector spring 233 under pressure. At this time, the ejector rod 232 slides out, and the product after hot pressing on the surface of the second mold core 231 can be demoulded;

[0101] When the product falls, it is blocked by the reference frame 40 and slides toward the auxiliary hot pressing module 20 .

[0102] Specifically, Fig.11 As shown: the mold-closing cooperative assembly 30 includes a gear seat 31 fixed on the surface of the lower mold seat 21, a synchronous gear 32 is installed on the gear seat 31, and a first rack 33 fixed on the fixed mold 22 and a second rack 34 fixed on the sleeve 16 are meshed on the surface of the synchronous gear 32;

[0103] When the movable mold 13 moves, elastic pressure is applied to the sleeve frame 16 through the elastic member 19. The elastic pressure drives the second rack 34 and the first rack 33 to move toward each other under the action of the synchronous gear 32, and drives the fixed mold 22 to move to one side of the reference frame 40 for attachment.

[0104] The mold-closing cooperative component 30 moves or stops synchronously with the first rack 33 and the second rack 34 through a synchronous gear 32, so that the sleeve 16 and the fixed mold 22 can move to one side of the reference seat to clamp the pulp roll and then perform the locking operation. When the clamping state is maintained, only the movable mold 13 continues to operate for hot pressing.

[0105] Specifically, Figure 1 and Fig.13 As shown, stroke columns 60 for supporting the fixed mold 22 and the clamping plate 17 to slide are fixed at the four corners of the opposite surfaces of the upper mold base 18 and the lower mold base 21 , and the reference frame 40 is fixed on the surface of the stroke column 60 .

[0106] By setting the stroke column 60, a supporting effect is achieved, and the upper mold base 18 and the lower mold base 21 can be connected to each other to form an integral frame structure, and the fixed mold 22 and the clamping plate 17 can slide on the surface to achieve a load-bearing effect. The clamping plate 17 supports the sleeve frame 16, and the sleeve frame 16 supports the movable mold 13 sliding on the inner wall, thereby achieving stable supported sliding as a whole.

[0107] This solution includes the following contents in the hot pressing operation:

[0108] Cutting the reserved area of ​​the surface layer of the pulp roll:

[0109] When the present solution is used, after the pulp roll (including the pulp layer and the surface layer, and the pulp layer includes the covered fluffy layer) moves to the hot pressing area in close contact with the reference frame 40, the two hydraulic rods 11 are activated, so that the movable mold 13 starts to move, and the holding assembly 12, the vibration plate 14 and the mold core assembly 15 fixed on the surface of the movable mold 13 move accordingly;

[0110] When the movable mold 13 moves, the elastic members 19 at the four corners of the movable mold 13 press the sleeve frame 16 to move, and the sleeve frame 16 moves with the clamping plate 17 under the elastic pressure of the elastic members 19 until the surface layer cutter 50 on one side of the clamping plate 17 contacts the surface of the pulp roll. As the movable mold 13 continues to move, the elastic members 19 stretch, and the force applied to the sleeve frame 16 gradually increases until the pressure reaches the cutting value of the surface layer cutter 50, so that the surface layer cutter 50 cuts the reserved area of ​​the surface layer.

[0111] In the above method, the pulp roll is clamped by elastic force to maintain its position so that it will not be misplaced during the subsequent clamping process of the movable mold 13, external force interference will not affect the quality of hot pressing, and the cutter is not required to cut into the pulp layer, which further improves the positioning effect and does not cause misalignment due to external pulling.

[0112] Moulding process:

[0113] Combination Fig.14 As shown, from left to right, there are three processes of mold closing. When the clamping plate 17 moves, as the elastic member 19 pushes the sleeve 16 to move, the second rack 34 of the sleeve 16 moves synchronously, and the second rack 34 of the mold closing cooperative component 30 meshes with the synchronous gear 32 to drive the first rack 33 to move toward each other. At this time, the first rack 33 moves and drives the fixed mold 22 to change its position until the fixed mold 22 moves to one side of the reference frame 40 to fit. At this time, the second mold core 231 of the fixed mold 22 and the clamping plate 17 fixed to the sleeve 16 are respectively located on both sides of the pulp roll and are in a fitting state. At this time, the position of the fixed mold 22 can be locked by the locking component 24, and when the fixed mold 22 is locked, the sleeve 16 is reacted to the mold closing cooperative component 30 so that it is locked and cannot move.

[0114] As the hydraulic rod 11 continues to press, the movable mold 13 continues to pull the elastic member 19 to apply pressure. During this process, the sleeve frame 16 does not move, and the movable mold 13 moves with the pressing assembly 12 and the mold core assembly 15 until the mold core assembly 15 contacts the pulp roll.

[0115] In the above process, the mold is closed by keeping the pulp roll in a fixed position and not moving, and the movable mold 13 and the fixed mold 22 move toward each other. In this process, the pulp roll is kept in a fixed position, avoiding the offset and positioning errors that may occur during the movement. The movement of the movable mold 13 and the fixed mold 22 toward each other can ensure the alignment accuracy during the mold closing process, ensure the consistency of product cutting and pressing quality, and ensure that the pulp roll will not be broken due to displacement strain during clamping. At the same time, since the pulp roll does not move, the movement of the movable mold 13 and the fixed mold 22 toward each other can apply pressure more evenly, ensuring that the force distribution of the material during the hot pressing process is uniform, avoiding defects caused by excessive or insufficient local pressure, and the fixed position of the pulp roll makes it a stable processing reference, which can adapt to the first mold core 153 and the second mold core 231 of different shapes or sizes.

[0116] Thermoforming process:

[0117] Combination Fig.15 As shown, as the hydraulic pressure continues to increase, the holding assembly 12 continues to transmit pressure, but does not generate axial reciprocating vibration. Through the holding force, the vibration seat 154 first contacts the surface layer, and during the extrusion, the inside of the pulp layer is separated toward both sides at the extrusion point under the extrusion, forming an extrusion fracture area (such as Fig.15 As shown in the middle c area), the surface layer is relatively smooth and has good tensile strength, and keeps sliding on the arc surface of the vibration seat 154, and as the extrusion fracture area (such as Fig.15 The surface layer is separated from the original pulp layer surface by the cutting of the reserved area of ​​the surface layer under the action of tension, and is attached to the inner extrusion area (as shown in the middle c area) under continuous downward pressure. Fig.15 The cutting process of the molding process and the cutting surface covering the surface layer are completed until the surface layer of the area is attached to the inner wall of the vibration seat 154;

[0118] The inner compression area (such as Fig.15 The surface layer is beyond the die-cutting area, so that it shrinks inward under the pressure. Similarly, the outer extrusion area of ​​the pulp layer (as shown in the Fig.15 The pulp layer on the cutting surface is squeezed outward (shown in area b in the middle) to fill the pulp layer on the cutting surface so that the cutting surface will not collapse. Moreover, more pulp layers are located on the cutting surface to bear a greater liquid pressure, making the edge of the cutting surface more compact and not loose.

[0119] As the pressure continues to increase, the vibration seat 154 slides on the outer wall of the second mold core 231, and the first mold core 153 and the second mold core 231 are respectively located on both sides of the pulp roll, and are squeezed in combination with the liquid pressure during heating. During the squeezing, the vibration seat 154 is limited on the outer side, so that the expansion of the cut surface is limited by the vibration seat 154;

[0120] At this time, the driver 122 of the pressing component 12 is started, and an axial reciprocating vibration is generated on the vibration seat 154. The reciprocating vibration seat 154 slides on the surface layer of the cutting surface, and combined with the extrusion force of the internal pulp layer to the outside, it maintains a tight fit. During the hot pressing process, the inner wall of the axially reciprocating vibration seat 154 is repeatedly rubbed against the surface layer of the cutting surface under the extrusion state, ensuring that the cutting surface and the surface layer can be stably fitted to avoid loose coverage caused by uneven pressure or material rebound. At the same time, the presence of the folded surface layer also increases the friction between the upper and lower surfaces of the cutting surface, which helps to prevent inter-layer slippage in subsequent use, and the surface layer of the cutting surface is more closely bonded to the pulp layer, further improving the overall structural strength and stability of the product.

[0121] At the same time, when the vibration seat 154 reciprocates axially, its liquid pressure acts on the second mold core 231. During the mutual extrusion and heating process of the second mold core 231, the vibration seat 154 slides on the surface of the support block 152 and hits the buffer pad, and applies an instantaneous impact force to the first mold core 153 through the buffer pad. The instantaneous impact force enhances the pressing effect of the hot pressing, helps the surface layer to fit the cutting surface more closely, improves the edge sealing effect, avoids the problem of tiny gaps or loose fibers on the cutting surface, and is beneficial to optimize the bonding strength between the surface layer and the pulp.

[0122] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for direct hot pressing molding of pulp rolls, comprising a hot pressing molding device, wherein the hot pressing molding device comprises a hot pressing cutting machine (08), characterized in that: The hot pressing cutting machine (08) comprises: The main hot pressing module (10) comprises a pressure-separating pressure-holding force and two hydraulic rods (11) and a pressure-holding assembly (12) for providing a vibration force. A movable mold (13) and a vibration plate (14) are arranged on one side of the pressure-holding assembly (12), and a plurality of mold core assemblies (15) are installed on the surface thereof. When the hydraulic rod (11) applies pressure to the movable mold (13) through the pressure-holding assembly (12), the pressure-holding assembly (12) applies axial reciprocating vibration to the mold core assembly (15) through the vibration plate (14). A plurality of surface layer cutters (50) for cutting the surface layer of the pulp roll are arranged on one side of the main hot pressing module (10); The auxiliary hot pressing module (20) is symmetrically arranged on one side of the main hot pressing module (10), and cooperates with the main hot pressing module (10) to complete the hot pressing operation on the other side of the pulp roll, and the auxiliary hot pressing module (20) also serves as the discharging side; A plurality of mold-closing cooperative components (30) are located between the main hot-pressing module (10) and the auxiliary hot-pressing module (20), and when the main hot-pressing module (10) is driven by hydraulic pressure, the hydraulic pressure is fed back to drive the auxiliary hot-pressing module (20) to perform a mold-closing action; A reference frame (40) is located between the main hot pressing module (10) and the auxiliary hot pressing module (20), with one side being in contact with the pulp roll and used for positioning the mold closing hot pressing position; During the mold closing and hot pressing process, the surface layer cutter (50) cuts the reserved area of ​​the surface layer of the pulp roll, the mold core assembly (15) separates the surface layer from the fluffy layer, and makes the surface layer adhere to the fracture surface of the pulp layer under the action of extrusion, so as to form a hot pressing die cutting area. Under the action of continuous liquid pressure, the mold core assembly (15) provides axial vibration force through the holding assembly (12) to hammer the pulp layer. At the same time, during the reciprocating vibration process, the surface layer area of ​​the fracture surface is subjected to extrusion friction.

2. The apparatus for direct hot pressing molding of pulp rolls according to claim 1, characterized in that: The main hot pressing module (10) further comprises an upper die seat (18), the hydraulic rod (11) passing through and fixed on the surface of the upper die seat (18), and the telescopic ends of the two hydraulic rods (11) are jointly fixed on one side of the pressing assembly (12); A sleeve frame (16) is slidably attached to the surface of the movable mold (13), and elastic members (19) are installed at the four corners of the sleeve frame (16) and the movable mold (13). A clamping plate (17) is fixed to one side of the sleeve frame (16), and the surface layer cutter (50) is installed on one side of the clamping plate (17).

3. The apparatus for direct hot pressing molding of pulp rolls according to claim 2, characterized in that: The pressing assembly (12) comprises a pressing seat (121) fixed to one end of the two hydraulic rods (11), the pressing seat (121) penetrates and slides on one side of the vibration plate (14), the pressing seat (121) is fixed to the inner wall of the movable mold (13), a plurality of sliding grooves (129) are provided on the pressing seat (121), a sliding rack (127) slides in two symmetrical sliding grooves (129) on the same side, and a return spring (128) supporting the sliding rack (127) is provided on the inner wall of the sliding groove (129); The pressing assembly (12) further comprises an eccentric disk (123) which is limitedly rotatable on the inner wall of the pressing seat (121); a driver (122) which drives the eccentric disk (123) to rotate is mounted on the surface of the pressing seat (121); a connecting rod (124) is movably connected to the surface of the eccentric disk (123) via a pin shaft; the other end of the connecting rod (124) is movably connected to a connecting seat (125) via a pin shaft; a support column (126) is rotatably connected to the inner wall of the connecting seat (125); the two ends of the support column (126) are fixed to opposite surfaces of two slides (127); and a rotation node is arranged in the middle section of the connecting rod (124).

4. The apparatus for direct hot pressing molding of pulp rolls according to claim 1, characterized in that: The mold core assembly (15) comprises a mold core seat (151) penetrating the surface of the movable mold (13); a vibration seat (154) is slidably fitted on the inner wall of the mold core seat (151); a first mold core (153) is slidably fitted on the inner wall of the vibration seat (154); a plurality of support blocks (152) penetrating the vibration seat (154) are fixed on the surface of the first mold core (153); and the end surface of the vibration seat (154) is arranged in an arc shape; A wiring tube (155) is provided on one side of the first mold core (153); one end of the vibration seat (154) penetrates and is fixed on the vibration plate (14); and a buffer pad is provided on one end of the support block (152) close to the first mold core (153).

5. The apparatus for direct hot pressing molding of pulp rolls according to claim 2, characterized in that: The auxiliary hot pressing module (20) comprises a lower die seat (21), a fixed die (22) being slidably disposed on one side of the lower die seat (21), a plurality of ejection assemblies (23) cooperating with the first die core (153) being mounted on the fixed die (22), and a locking assembly (24) for positioning the position of the movable die (13) being disposed on the surfaces of the movable die (13) and the lower die seat (21).

6. The apparatus for direct hot pressing molding of pulp rolls according to claim 5, characterized in that: The locking assembly (24) comprises a clamping column (244) fixed to the movable mold (13) and penetrating and sliding on one side of the lower mold base (21), and also comprises a groove (241) provided on the surface of the lower mold base (21), a pin plate (242) slidingly arranged on the inner wall of the groove (241), and a telescopic cylinder (243) for controlling the reciprocating motion of the pin plate (242) installed in the groove (241), and a pin hole (245) cooperating with the pin plate (242) for positioning is provided on the arc-shaped side wall of the clamping column (244); When the fixed mold (22) slides to a predetermined position with the clamping column (244), the telescopic cylinder (243) controls the pin plate (242) to slide into the pin hole (245) and supports the clamping column (244) and the fixed mold (22) to be locked at the predetermined position.

7. The apparatus for direct hot pressing molding of pulp rolls according to claim 6, characterized in that: The ejection assembly (23) comprises a second mold core (231) disposed on one side of the fixed mold (22), an ejection rod (232) slidingly passing through the second mold core (231), and an ejection spring (233) being fixed to the ejection rod (232) and the inner wall of the fixed mold (22); When the fixed mold (22) is reset, the ejector rod (232) contacts the lower mold base (21) and compresses the ejector spring (233) to eject the material; when the mold is closed, the spring resets the ejector rod (232).

8. The apparatus for direct hot pressing molding of pulp rolls according to claim 5, characterized in that: The mold clamping cooperative component (30) comprises a gear seat (31) fixed on the surface of the lower mold seat (21), a synchronous gear (32) being mounted on the gear seat (31), and a first rack (33) fixed on the fixed mold (22) and a second rack (34) fixed on the sleeve (16) being meshed on the surface of the synchronous gear (32); When the movable mold (13) moves, an elastic pressure is applied to the sleeve frame (16) through the elastic member (19). The elastic pressure drives the second rack (34) and the first rack (33) to move towards each other under the action of the synchronous gear (32), thereby driving the fixed mold (22) to move to one side of the reference frame (40) to fit.

9. The apparatus for direct hot pressing molding of pulp rolls according to claim 8, characterized in that: A stroke column (60) for supporting the sliding of the fixed die (22) and the clamping plate (17) is fixed at the four corners of the opposite surfaces of the upper die seat (18) and the lower die seat (21), and the reference frame (40) is fixed on the surface of the stroke column (60).

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