A device for double-sided calendering of foamed materials
Through the double-sided calendering equipment and progressive cooling device, the problems of uneven flatness and uneven expansion caused by the foam material calendering equipment in the prior art are solved, and the uniform expansion and high finish of the foam material are achieved, and the material is protected. Performance and energy savings.
Patent Information
- Application Number
- CN202111184843.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-10-12
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2041-10-12
AI Technical Summary
Existing foam calendering equipment causes uneven flatness, uneven expansion, and low finish, which seriously affects the quality of the board.
The double-sided calendering equipment is adopted, and the upper and lower pressure plates are applied simultaneously, combined with a progressive cooling device to ensure uniform expansion, high finish, good flatness of the foam material, and protect the material performance through progressive cooling.
The uniform expansion of foam material is achieved, the finish and flatness are improved, the material performance is protected, and the energy consumption during cooling is reduced.
Smart Images
Figure CN113733445B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of foam material production and processing, and in particular relates to a device for double-sided calendering of foam materials. Background Art
[0002] Foam materials are very common building decoration materials. Foam materials can be divided into soft foam materials and structural foam materials. Soft foam materials are made of raw materials such as plastics (PE, EVA, etc.) and rubbers (SBR, CR, etc.), with catalysts, foam stabilizers, foaming agents and other auxiliary materials. Through physical foaming or cross-linking foaming, a large number of fine foams appear in plastics and rubbers, increasing the volume and reducing the density. Soft foam materials are light in weight and soft, and have functions such as buffering, sound absorption, shock absorption, heat preservation, and filtering. They are widely used in electronics, home appliances, automobiles, sports and leisure industries. Structural foam materials are based on plastics (PVC, PET, etc.) and are modified by a penetrating aromatic amide polymerization network. Like soft foam materials, they have a very low density but very high strength. They are suitable for high-end fields that require light materials and high strength. They are mainly used in wind power generation, rail transportation, yachts, aerospace, building energy conservation and other industries.
[0003] After the foaming process is completed, the foam material often needs to be calendered to shape the foamed material or smooth the surface to improve the surface smoothness of the foam material and achieve standardized processing of the foam material.
[0004] A Chinese patent with the published application number CN201020111358.9 discloses a PVC foam board calendering and shaping equipment, which relates to the field of PVC board production and processing. It includes a frame, and also includes at least one PVC foam board shaping device composed of two mutually parallel pressing plates, and the PVC foam board shaping device is arranged on the frame. The PVC foam board shaping device includes a protective shell, an upper pressing plate and a lower pressing plate, and the upper pressing plate is adjustably connected to the protective shell on the frame through a downward pressing drive device and a guide column. The lower side of the upper pressing plate is correspondingly provided with a lower pressing plate, and the lower pressing plate is fixed on the frame. This equipment changes the shaping and polishing process of the PVC foam board from the original line contact calendering and shaping of the board and the calendering roller to the surface contact between the board and the pressing plate, thereby improving the quality of the calendering and shaping of the board; at the same time, by setting a multi-level PVC foam board shaping device, a board with better surface quality can be obtained. In this application, the calendering operation is performed by the clamping force between two plates. During the calendering process, one panel applies pressure while the other panel is fixed. During this processing, because the surface temperature of the foamed foam material is relatively high before the calendering operation, the surface of the foam material in contact with the contact plate will form different surface morphologies when it is exposed to different forces. During calendering, the plate applying pressure is constantly moving downward. In this downward process, the upper pressure plate has a tendency to move, while the lower pressure plate has no tendency to move. In this way, the smoothness of the calendered surface finally formed by the foam materials on both sides will be different, and the expansion of the foam materials on both sides will be different.
[0005] The Chinese patent with the published application number CN201820458869.4 discloses a device for extrusion calendering of cross-linked polyethylene foam mother sheets, including a frame, cooling guide rollers are installed at the upper and lower ends of the top of the frame, four or more cooling guide rollers are installed at the upper end of the top of the frame, two or more cooling guide rollers are installed at the lower end of the top of the frame, and a discharge roller frame and a feed roller frame are installed on both sides of the cooling guide roller on the frame, and a cutting rod is installed between the two cooling guide rollers at the upper end of the top of the frame on one side of the discharge roller frame, and two cutting knives are installed on the cutting rod, and an adjustment device is installed on the cutting knife, and the tip of the cutting knife is lower than the top of the cooling guide roller, and a calendering roller is installed on the feed roller frame, and a feed guide roller is also installed above the calendering roller. Advantages of the utility model: 1. Improve the thickness uniformity and surface flatness of the finished product. 2. Improve efficiency and production capacity. 3. Convenient production and low cost.
[0006] The structure in this application realizes calendering through extrusion between rollers, which is a line contact process and may result in uneven calendering and poor flatness.
[0007] The foam material calendering equipment in the prior art has uneven flatness on both sides after calendering, uneven expansion of the foam material, low smoothness and low density of the processed board, which seriously affects the quality of the board. Summary of the invention
[0008] In view of this, the present invention provides a double-sided calendering device for foamed materials, which has a tendency to apply pressure to the foamed material to be processed through the upper pressing plate and the lower pressing plate at the same time, so that the prepared foamed material has uniform expansion, high smoothness and good flatness.
[0009] The present invention is a device for double-sided calendering of foamed materials, comprising a substrate, a lower calendering plate movably connected to the substrate by a torsion spring, an upper calendering plate arranged parallel to the lower calendering plate, the upper calendering plate being fixedly connected to a fixed rod, an external thread being arranged at the non-fixed end of the fixed rod, the device also comprising a lifting and adjusting device capable of being threadedly connected to the fixed rod, a driving device partially meshing with the lifting and adjusting device, the lifting and adjusting device comprising a driving part having an external gear on the outside and a through hole on the inside, a fixed bracket passing through the driving part, and a driven part fixedly connected to the driving part, the driven part being provided with an accommodating cavity, the accommodating cavity being provided with an internal thread, the internal thread cooperating with the external thread, a groove being provided at the bottom of the driving part, a limit block being fixedly connected to the bottom of the fixed bracket, and the limit block being accommodated in the groove.
[0010] Preferably, the substrate is arranged horizontally, and the angle between the lower calendering plate and the horizontal direction is 20-45°.
[0011] Preferably, the driving device comprises a driving motor, a connecting rod fixedly connected to an output end of the driving motor, and a driving gear fixedly connected to the connecting rod, wherein the driving gear meshes with the external gear.
[0012] Preferably, the driving part and the driven part are both cylindrical, and the accommodating cavity is a cylindrical groove opened at the non-fixed end of the driven part.
[0013] Preferably, the upper calendering plate is a disc, and the fixing rod is fixed to the center of the lower calendering plate.
[0014] Preferably, the friction coefficient of the lower calendering plate is 0.8.
[0015] Preferably, the equipment further comprises a cooling device abutting against the lower calendering plate.
[0016] Preferably, the cooling device includes a cooling box provided with a feed inlet and a discharge port, an inclined conveyor belt arranged inside the cooling box, and cooling belts mounted on the upper and lower sides of the conveyor belt, and the cooling box is provided with an exhaust port.
[0017] Preferably, the cooling belt is a folded water conveying plate, and the folding density of the water conveying plate decreases from bottom to top.
[0018] Put the foam material to be calendered on the lower calendering plate, and then rotate the driving device to make the driving part rotate, driving the driven part to rotate, forcing the fixed rod to extend downward, so that the upper matte plate contacts the foam material, and the upper and lower calendering plates clamp the foam material to perform double-sided calendering. During the calendering process, the upper and lower calendering plates and the foam material move downward; after calendering is completed, the driving device is rotated in the reverse direction to make the upper calendering plate move upward, and the lower calendering plate deflects in the reverse direction to bounce the foam material; the foam material enters the cooling device and is gradually cooled from top to bottom to complete the double-sided calendering.
[0019] The present invention has a tendency to apply pressure to the foam material to be processed through the upper pressing plate and the lower pressing plate at the same time, so that the foam material has uniform expansion, high smoothness and good flatness. At the same time, the cooling process is progressive cooling, and the cooling temperature is gradually reduced to achieve cooling of the foam material, which well protects the performance of the foam material. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of a device for double-sided calendering of a foam material provided in a specific embodiment of the present invention;
[0021] Figure 2 It is a structural schematic diagram of an upper calendering plate of a foam material double-sided calendering device provided in a specific embodiment of the present invention;
[0022] Figure 3 It is a structural schematic diagram of a driving part of a device for double-sided calendering of foamed materials provided in a specific embodiment of the present invention;
[0023] Figure 4 A cross-sectional view of a driving portion of a device for double-sided calendering of foamed materials provided in a specific embodiment of the present invention;
[0024] Figure 5 It is a structural schematic diagram of a driven part of a foam material double-sided calendering device provided in a specific embodiment of the present invention;
[0025] Figure 6 It is a structural schematic diagram of a cooling device of a foam material double-sided calendering device provided in a specific embodiment of the present invention;
[0026] Figure 7 It is a schematic structural diagram of a cooling belt of a foam material double-sided calendering device provided in a specific embodiment of the present invention.
[0027] Among them: base plate 1, torsion spring 2, lower calendering plate 3, limit baffle 31, upper calendering plate 4, limit rod 41, fixing rod 42, external thread 421, lifting and lowering adjustment device 5, driving part 51, external gear 511, through hole 512, groove 513, fixing bracket 52, limit block 521, driven part 53, accommodating cavity 531, internal thread 5311, driving device 6, driving motor 61, connecting rod 62, driving gear 63, cooling device 7, cooling box 71, feed port 711, discharge port 712, exhaust port 713, conveyor belt 72, cooling belt 73, support rod 8. DETAILED DESCRIPTION
[0028] The present invention is described in detail below in conjunction with specific embodiments. "Upward" and "downward" in this application both refer to upward or downward on a straight line where the entirety of the object is located.
[0029] See also Figures 1 to 7 , a double-sided calendering device for foaming materials, comprising a substrate 1, a lower calendering plate 3 movably connected to the substrate 1 through a torsion spring 2, and an upper calendering plate 4 (arranged above the lower calendering plate 3) arranged parallel to the lower calendering plate 3, a limit rod 41 fixedly connected to the upper calendering plate 4, and a limit baffle 31 for resisting the limit rod 41 is arranged on the lower calendering plate 3 (the purpose of this arrangement is to make the lower calendering plate 3 only move up and down in a direction perpendicular to the initial state of the lower calendering plate 3, and cannot rotate on its own, so that when the driven part 53 rotates, the internal thread 5311 rotates relative to the external thread 421, and the rotation of the internal thread 5311 forces the fixing rod 42 to move up and down along the straight line where it is located, so as to realize the lower calendering The upper calendering plate 4 is fixedly connected to a fixed rod 42, and an external thread 421 is arranged at a non-fixed end of the fixed rod 42. The equipment also includes a lifting and adjusting device 5 which can be threadedly connected to the fixed rod 42, and a driving device 6 which is partially engaged with the lifting and adjusting device 5. The lifting and adjusting device 5 includes a driving part 51 which is provided with an external gear 511 on the outside and a through hole 512 on the inside, a fixed bracket 52 passing through the through hole 512, and a driven part 53 fixedly connected to the driving part 51, and the driven part 53 is provided with an accommodating cavity 531, and an internal thread 5311 is arranged in the accommodating cavity 531. The internal thread 5311 cooperates with the external thread 421, and the fixed rod 42 can extend into the accommodating cavity 531. A groove 513 is provided at the bottom of the driving part 51, and a limit block 521 is fixed to the bottom of the fixed bracket 52. The limit block 521 is accommodated in the groove 513. The purpose of this arrangement is to allow the truncated cone-shaped driving part 51 to be suspended on the fixed bracket 52. When the driving part 51 is driven by the gear of the driving device 6, the driving part 51 can make a circular motion with the fixed bracket 52 as the central rotation axis.
[0030] The substrate 1 is arranged horizontally, and the angle between the lower calendering plate 3 and the horizontal direction is 20-45°. Such an angle is more conducive to the regulation of the calendering force during calendering.
[0031] The driving device 6 includes a driving motor 6161, a connecting rod 62 fixedly connected to the output end of the driving motor 6161, and a driving gear 63 fixedly connected to the connecting rod 62, and the driving gear 63 is meshed with the external gear 511. The driving part 51 and the driven part 53 are both cylindrical, and the accommodating cavity 531 is a cylindrical groove 513 opened at the non-fixed end of the driven part 53. The upper calendering plate 4 is a disc, and the fixing rod 42 is fixedly connected to the center of the lower calendering plate 3. The friction coefficient of the lower calendering plate 3 is 0.8.
[0032] The limit baffle 31 can resist the limit rod 41, so that the truncated cone-shaped upper calendering plate 4 cannot rotate. When the driven part 53 rotates, the internal thread 5311 in the accommodating cavity 531 rotates relative to the external thread 421 of the fixing rod 42. During the rotation of the driven part 53, the fixing rod 42 is forced to move upward or downward, thereby driving the upper calendering plate 4 to move upward or downward on the straight line where it is located (i.e., the direction perpendicular to the initial state of the lower calendering plate 3), thereby clamping the upper calendering plate 4 and the lower calendering plate 3. The foam material between them is calendered. During the calendering process, the upper calendering plate 4 continuously applies downward pressure to the foam material and the lower calendering plate 3. When the lower calendering plate 3 is pressed downward, the lower calendering plate 3 is subjected to an upward force under the action of the torsion spring 2. Of course, the position of the lower calendering plate 3 is eventually deflected downward. In this process, the foam material is calendered. During this calendering process, the upper side of the foam material is subjected to the squeezing force of the upper pressing plate, and the foam material on the lower side is subjected to the push-up force from the lower calendering plate 3 (the upward rebound force brought by the torsion spring 2 can also be felt). The foam material is subjected to a calendering force on both sides, and the foam material on the lower side is more moderately calendered. The calendering makes the foam material uniform in expansion, high in smoothness and good in flatness. When the foam material is calendered, the driving part 51 is rotated in the reverse direction to make the internal thread 5311 of the driven part 53 rotate in the reverse direction. When the limit rod 41 contacts the limit baffle 31, the upper calendering plate 4 cannot rotate. The rotation of the lower external thread 421 will rotate to make the fixed rod 42 move in the opposite direction, so that the upper matte plate moves upward, and loses the squeezing of the foam material. Under the action of the rebound force of the torsion spring 2, the lower calendering plate 3 will bounce up, and at the same time drive the foam material on the lower calendering plate 3 to be bounced up or have a tendency to be bounced up. In this way, the foam material after calendering will move downward along the lower calendering plate 3 under the action of gravity. Therefore, the smoothness of the lower calendering plate 3 must meet the requirements, and a sampling device can also be added to transfer the matte foam material to the next processing area. Compared with the lower calendering plate 3 being fixed, the lower calendering plate 3 in this embodiment will be more relaxed when calendering the foam material, which is equivalent to providing a buffering process, so as to avoid the phenomenon of uneven calendering caused by sudden force.
[0033] A support rod 8 is fixed on the base plate 1. The support rod 8 is vertical. When the lower pressing plate 3 is not under force, the support rod 8 does not contact the lower pressing plate 3. When the lower pressing plate is under pressure, the lower pressing plate contacts the support plate. The function of the support rod 8 is to prevent the lower pressing plate 3 from being pressed too much downward, and the foaming material between the upper pressing plate and the lower pressing plate is twisted and deformed. The base plate 1 and the lower pressing plate 3 are connected by a torsion spring 2. When the lower pressing plate 3 is under pressure, the lower pressing plate 3 will move downward and rotate clockwise along the connection. When the external force on the lower pressing plate is removed, the resilience of the torsion spring 2 will bounce the lower pressing plate 3 in the reverse direction.
[0034] The equipment also includes a cooling device 7 abutting against the lower calender plate 3. The cooling device 7 includes a cooling box 71 provided with a feed port 711 and a discharge port 712, an inclined conveyor belt 72 arranged inside the cooling box 71, and a cooling belt 73 erected on both sides of the upper and lower sides of the conveyor belt 72. The cooling box 71 is provided with an exhaust port 713. (The exhaust port 713 should be located above the conveyor belt 72 to facilitate the discharge of hot air. As shown in the figure, it is arranged at the upper end of the feed port 711). The cooling belt 73 is a folded water conveying plate, and the folding density of the water conveying plate decreases from bottom to top.
[0035] After calendering, the foam material enters the cooling box 71 from the feed port 711, and moves to the discharge port 712 under the action of the conveyor belt 72. In this process, because the folding density of the water conveying plate decreases from bottom to top, the temperature of the foam material is getting lower and lower. In this way, the cooling can achieve the effect of graded cooling, avoiding the changes in the internal structure of the foam material caused by rapid cooling, and the heat flow goes upward. The lower the temperature is, the hot air flows upward and is discharged through the exhaust port 713, saving the energy required for cooling.
[0036] The working principle of the device in this embodiment:
[0037] Place the foam material to be calendered on the lower calendering plate 3, and then rotate the driving device 6 to rotate the driving part 51, which drives the driven part 53 to rotate, forcing the fixed rod 42 to extend downward, so that the upper matte plate contacts the foam material, and the upper and lower calendering plates 3 clamp the foam material to perform double-sided calendering. During the calendering process, the upper and lower calendering plates 3 and the foam material move downward; after calendering is completed, the driving device 6 is rotated in the reverse direction to make the upper calendering plate 4 move upward, and the lower calendering plate 3 deflects in the reverse direction to bounce the foam material; the foam material enters the cooling device 7 and is gradually cooled from top to bottom to complete the double-sided calendering.
[0038] The present invention has a tendency to apply pressure to the foam material to be processed through the upper pressing plate and the lower pressing plate at the same time, so that the foam material prepared has uniform expansion, high smoothness and good flatness. At the same time, the cooling process is progressive cooling, and the cooling temperature is gradually reduced to achieve cooling of the foam material, which well protects the performance of the foam material and saves energy.
[0039] The present invention is not limited to the above specific implementations, and the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made to the above implementations based on the technical essence of the present invention shall be included in the protection scope of the present invention.
Claims
1. A device for double-sided calendering of foamed materials, characterized in that: The cam is connected to the upper and lower surfaces of the upper and lower surfaces of the upper and lower surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower and upper surfaces of the lower surfaces of the lower and upper surfaces of the upper and lower ... The substrate is arranged horizontally, and the angle between the lower calendering plate and the horizontal direction is 20-45°; The device also includes a cooling device abutting against the lower calender plate; The cooling device comprises a cooling box provided with a feed inlet and a discharge outlet, an inclined conveyor belt arranged inside the cooling box, and cooling belts mounted on both sides of the conveyor belt, and an exhaust port is provided on the cooling box; The cooling belt is a folded water conveying plate, and the folding density of the water conveying plate decreases from bottom to top.
2. The double-sided calendering device for foamed materials according to claim 1, characterized in that: The driving device comprises a driving motor, a connecting rod fixedly connected to an output end of the driving motor, and a driving gear fixedly connected to the connecting rod, wherein the driving gear meshes with the external gear.
3. The double-sided calendering device for foamed materials according to claim 1, characterized in that: The driving part and the driven part are both cylindrical, and the accommodating cavity is a cylindrical groove opened at the non-fixed end of the driven part.
4. The double-sided calendering device for foamed materials according to claim 1, characterized in that: The upper calendering plate is a disc, and the fixing rod is fixedly connected to the center of the lower calendering plate.
5. The double-sided calendering device for foamed materials according to claim 1, characterized in that: The friction coefficient of the lower calendering plate is 0.8.