Hot press molding equipment for environment-friendly biomass packaging material
By combining the limiting mechanism and the hot pressing mechanism, the problem of wrinkles and warping of environmentally friendly biomass packaging materials under high pressure and high speed is solved, thereby improving the surface smoothness of the material and the efficiency of thermal energy utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-07
AI Technical Summary
Existing thermoforming equipment causes wrinkles and warping deformation in environmentally friendly biomass packaging materials under high pressure and high speed, affecting sealing performance and causing serious heat loss.
The design employs a combination of a limiting mechanism and a hot pressing mechanism, including a limiting plate, a limiting rod, a telescopic component, and a separating component. The pressing speed is controlled by a buffer mechanism, and the separating component is used to block heat radiation conduction, thereby reducing heat loss.
It effectively eliminates material wrinkles and warping, improves the surface smoothness of finished products, reduces heat loss, and enhances yield and sealing performance.
Smart Images
Figure CN224089472U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of environmentally friendly biomass packaging materials, specifically a thermoforming equipment for environmentally friendly biomass packaging materials. Background Technology
[0002] Environmentally friendly biomass packaging materials are usually derived from renewable resources such as agricultural waste and plant fibers. Through biorefining technology, natural polymers such as cellulose, lignin, and starch are extracted. Their advantages lie in being biodegradable, non-toxic, and biocompatible, which can effectively reduce environmental pollution and make them an ideal alternative to traditional plastic packaging.
[0003] When hot-pressing environmentally friendly biomass packaging materials, the heating modes of existing equipment are insufficiently adapted to the phase change characteristics of biomass materials, leading to non-uniform flow due to temperature stratification during the hot-pressing process. When the pressing speed exceeds 25 mm / s, the shear rate at the material edge exceeds the critical value, resulting in localized stress concentration and ultimately producing wavy wrinkles with a depth of 0.1-0.3 mm on the product surface, reducing the yield rate to below 78%. Furthermore, the heating elements of the hot-pressing equipment continuously dissipate heat; when the surface temperature of the hot-pressing table exceeds 40°C, it easily causes product warping and deformation, directly affecting sealing performance. Utility Model Content
[0004] Therefore, it is necessary to provide a thermoforming equipment for environmentally friendly biomass packaging materials to address the problem of wrinkles in packaging materials caused by the high pressing speed of existing thermoforming equipment.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A thermoforming equipment for environmentally friendly biomass packaging materials mainly consists of a thermoforming table, a limiting mechanism, and a thermoforming mechanism.
[0007] The limiting mechanism includes limiting plates, limiting rods, and telescopic components; at least two limiting plates are located on the top of the hot press table and are linearly distributed in the conveying direction of the packaging material on the hot press table; two limiting rods are fixed to the bottom of the limiting plates and run longitudinally through the hot press table, and the line connecting the two limiting rods is perpendicular to the conveying direction of the packaging material on the hot press table; the telescopic components are located outside the limiting rods and are installed on the hot press table to provide longitudinal elastic support for the limiting plates.
[0008] The hot pressing mechanism is installed on the hot pressing table and located above the limiting mechanism. When the hot pressing part of the hot pressing mechanism moves down to contact the limiting plate, the pressing speed is slowed down and used to hot press the packaging material.
[0009] Further, the telescopic part comprises a screw rod, a limiting bolt and a spring; the screw rod is located outside the limiting rod, the top end of the screw rod is connected with the limiting plate, and the bottom end penetrates the hot pressing table longitudinally; the spring is arranged on the outer periphery of the screw rod and between the hot pressing table and the limiting plate; the limiting bolt is threadedly connected on the screw rod and located below the hot pressing table, and the limiting bolt limits the longitudinal elastic distance of the limiting plate.
[0010] Further, the telescopic part comprises a movable rod, a buckle and a spring; the movable rod is located outside the limiting rod, the top end of the movable rod is connected with the limiting plate, and the bottom end penetrates the hot pressing table longitudinally; the spring is arranged on the outer periphery of the movable rod and between the hot pressing table and the limiting plate; the buckle is arranged on the surface of the movable rod and located below the hot pressing table, and the buckle limits the longitudinal elastic distance of the limiting plate.
[0011] Further, the hot pressing mechanism comprises a support, a heating assembly and a separation assembly; the support is connected with the hot pressing table, the heating assembly is longitudinally arranged on the support, and the heating end faces the hot pressing table; the separation assembly is horizontally arranged on the support and located between the heating assembly and the hot pressing table, and blocks the heat of the heating assembly from spreading to the hot pressing table.
[0012] Further, the heating assembly comprises a telescopic cylinder and a hot pressing plate; the fixed end of the telescopic cylinder is fixedly connected with the top of the support, the movable end faces downward and is connected with the hot pressing plate, and the hot pressing plate is internally embedded with arrayed heating coils and a temperature measuring sensor.
[0013] Further, the separation assembly comprises a linear slide table module and a heat insulation plate; the linear slide table module is horizontally arranged on the support, the heat insulation plate is connected with the movable end of the linear slide table module and located below the hot pressing plate; when the height of the hot pressing plate is higher than that of the heat insulation plate, the heat insulation plate is moved to the position directly below the hot pressing plate.
[0014] Further, the side of the support, opposite to the linear slide table module, is connected with a stabilizing plate, and the side of the stabilizing plate, facing the heat insulation plate, is provided with a groove for supporting the stabilizing plate.
[0015] Further, the edge of the heat insulation plate, located in the groove of the stabilizing plate, is provided with a ball bearing, and the ball bearing is in contact with the groove of the stabilizing plate.
[0016] Further, the surface of the hot pressing table is provided with an anti-sticking coating.
[0017] Further, the support or the hot pressing table is provided with an image sensor for collecting the hot pressing position of the packaging material.
[0018] Compared with the prior art, the beneficial effects of the present application include:
[0019] 1. The utility model discloses a double limiting rod linkage layout and the combination design of telescopic spare, form the buffer mechanism in the hot press plate down -pressing process, the spring of telescopic spare absorbs the hot press plate impact force in the initial stage of compression, makes the compression speed from high -speed stage smooth transition to low -speed precision compression stage, effectively eliminates the material wrinkle, edge cracking phenomenon caused by instantaneous pressure concentration, improves the finished product surface flatness.
[0020] 2. The utility model discloses the dynamic cooperation of the partition assembly and hot press plate, in the non -compression stage, the heat insulation board accurate cover hot press platform heating area, block the heat radiation conduction path, reduce the influence to hot press platform temperature simultaneously, reduce the heat loss of hot press plate, reduce the thermal energy loss, has the energy -conserving advantage. DRAWINGS
[0021] The disclosure of the utility model will be explained with reference to the drawings. It should be appreciated that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the utility model. In the drawings, the same reference signs are used to refer to the same parts. Among them:
[0022] Figure 1 It is a perspective view of a hot press forming equipment for an environmental protection biomass packaging material according to the embodiment 1 of the utility model;
[0023] Figure 2 It is another perspective view based on Figure 1 ;
[0024] Figure 3 It is a side view of a hot press forming equipment for an environmental protection biomass packaging material based on Figure 1 ;
[0025] Figure 4 It is a side view of a hot press forming equipment for an environmental protection biomass packaging material according to the embodiment 2.
[0026] Marked in the drawing: 1, hot press platform; 2, limiting mechanism; 21, limiting plate; 22, limiting rod; 23, telescopic spare; 231, screw rod; 232, limiting bolt; 233, spring; 234, movable rod; 235, buckle; 3, hot press mechanism; 31, support; 32, heating assembly; 321, telescopic cylinder; 322, hot press plate; 33, partition assembly; 331, linear slide table module; 332, heat insulation board; 34, firm plate. DETAILED DESCRIPTION
[0027] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.
[0028] Example 1
[0029] Please see Figure 1 This embodiment introduces a thermoforming equipment for environmentally friendly biomass packaging materials, which mainly consists of a thermoforming table 1, a limiting mechanism 2, and a thermoforming mechanism 3.
[0030] The surface of the hot press table 1 is coated with an anti-stick coating to reduce material adhesion. The anti-stick coating can be made of polytetrafluoroethylene, silicon carbide-based ceramic coating, or graphene composite material coating. The coating thickness is preferably 0.05-0.2 mm. In addition, to facilitate the curing operation after hot pressing, a circulating cooling water channel can be pre-embedded inside the hot press table 1. The water channel is arranged in a serpentine pattern and connected to an external temperature control system. It can maintain the table surface temperature within a certain range during the non-pressing stage to prevent pre-curing of biomass raw materials.
[0031] Combination Figure 1 and Figure 2 The following is a description of the limiting mechanism 2.
[0032] The limiting mechanism 2 mainly consists of a limiting plate 21, a limiting rod 22, and a telescopic component 23. At least two limiting plates 21 are located on top of the hot press table 1 and are linearly distributed along the conveying direction of the packaging material on the hot press table 1. It should be noted that the bottom edge of the limiting plate 21 has a chamfer to prevent scratching the packaging material to be hot-pressed. The length of the limiting plate 21 is less than the size of the hot press table 1. Taking the conveying direction of the packaging material as the X direction and the horizontal and vertical direction as the Y direction, the length of the limiting plate 21 in the Y direction is greater than the Y direction dimension of the packaging material. The surface of the limiting plate 21 can also be provided with locking holes for locking plates of the same material as the limiting plate 21 to extend the size of the limiting plate 21, thereby accommodating changes in the hot-pressing size of the packaging material.
[0033] Two limiting rods 22 are fixed to the bottom of the limiting plate 21 and run longitudinally through the hot press table 1. It should be noted that the hot press table 1 itself has holes for the limiting rods 22 to pass through. The direction of the line connecting the two limiting rods 22 is perpendicular to the conveying direction of the packaging material on the hot press table 1. The surface of the limiting rods 22 is smooth. If they come into contact with the packaging material, they will not affect the conveying of the packaging material or damage the packaging material.
[0034] Please see Figure 3The telescopic component 23 includes a screw 231, a limiting bolt 232, and a spring 232. The screw 231 is located outside the limiting rod 22, with its top end connected to the limiting plate 21 and its bottom end extending longitudinally through the hot press table 1. Since the screw 231 is located outside the limiting rod 22, it does not contact the packaging material. A hole is provided on the hot press table 1 for the screw 231 to pass through. The spring 232 is disposed on the outer periphery of the screw 231 and is located between the hot press table 1 and the limiting plate 21. It is used to push the limiting plate 21 upward, ensuring that the limiting plate 21 does not initially contact the surface of the hot press table 1. The limiting bolt 232 is located below the hot press table 1 and is threaded onto the screw 231. When the limiting bolt 232 contacts the bottom of the hot press table 1, the limiting plate 21 is restricted, and the spring 232 cannot continue to push the limiting plate 21 upward. Therefore, rotating the limiting bolt 232 to change its connection position with the screw 231 can adjust the longitudinal range of motion of the limiting plate 21.
[0035] The hot pressing mechanism 3 will be described in detail below.
[0036] Combination Figure 1 and Figure 2 The hot-pressing structure mainly includes a support 31, a heating component 32, and a separating component 33. The support 31 is located at the edge of the hot-pressing table 1, not affecting the conveying and hot-pressing of packaging materials. The support 31 is detachably mounted on the hot-pressing table 1 for easy subsequent positional adjustments to accommodate packaging materials with different processing requirements. The heating component 32 mainly includes a telescopic cylinder 321 and a hot-pressing plate 322. The fixed end of the telescopic cylinder 321 is fixed to the top of the support 31, and the movable end faces downward and is connected to the hot-pressing plate 322. The telescopic cylinder 321 can be replaced by a hydraulic cylinder or an electric telescopic rod. The telescopic cylinder 321 drives the hot-pressing plate 322 to move longitudinally. The hot-pressing plate 322 has an array of heating coils and a temperature sensor embedded inside. The heating coils can use nickel-chromium alloy heating wires, and the surface of the hot-pressing plate 322 has a graphene thermally conductive layer. The array of heating coils, combined with the temperature sensor, facilitates precise temperature control and ensures the thermoplastic uniformity of the biomass material.
[0037] The separating component 33 mainly consists of a linear slide module 331 and a heat insulation plate 332. The linear slide module 331 is horizontally mounted on the bracket 31, and the heat insulation plate 332 is connected to the movable end of the linear slide module 331. In the initial state, the heat insulation plate 332 is located below the hot press plate 322. When the height of the hot press plate 322 is higher than that of the heat insulation plate 332, the heat insulation plate 332 moves to be directly below the hot press plate 322. When the hot press plate 322 needs to be hot-pressed, the linear slide module 331 drives the heat insulation plate 332 to deviate, without obstructing the downward pressing operation of the hot press plate 322. To ensure the smooth horizontal movement of the heat insulation plate 332, a groove matching the thickness of the heat insulation plate 332 is provided on the side of the stabilizing plate 34 near the heat insulation plate 332 at the same height as the linear slide module 331 on the support 31. The edge of the heat insulation plate 332 is located within the groove. When the linear slide module 331 moves the heat insulation plate 332, the edge of the heat insulation plate 332 slides within the groove to improve the overall smoothness of the movement of the heat insulation plate 332. In a specific implementation, if the heat insulation plate 332 is thick, a T-shaped slider can be provided on the edge of the heat insulation plate 332 to match the groove of the stabilizing plate 34, and the T-shaped slider slides within the groove. In addition, to reduce the coefficient of friction, ball bearings (not shown in the figure) are embedded at the edge of the heat insulation plate 332, that is, at the position located within the groove. The contact between the ball bearings and the groove is changed to rolling friction to reduce frictional resistance.
[0038] For future equipment improvements, an image sensor (not shown in the figure) is installed on the support 31 or the hot press table 1 to collect data on the hot-pressing position of the packaging material. The image sensor can capture the condition of the packaging material after hot pressing. It is connected to a corresponding control device, uploading the data for storage and providing foundational data for subsequent data analysis, thus supporting equipment improvements. In actual use, the image sensor can be replaced with a spectral sensor, scanner, etc., depending on actual needs.
[0039] This embodiment uses the combination design of the linkage layout of the double limit rods 22 and the telescopic component 23 to form a buffer mechanism during the pressing process of the hot press plate 322. The spring 232 of the telescopic component 23 absorbs the impact force of the hot press plate 322 in the early stage of pressing, so that the pressing speed smoothly transitions from the high-speed stage to the low-speed precision pressing stage, effectively eliminating the material wrinkles and edge cracks caused by instantaneous pressure concentration, and improving the surface flatness of the finished product.
[0040] Example 2
[0041] Please see Figure 4This embodiment introduces a thermoforming device for environmentally friendly biomass packaging materials, which has a structure basically the same as the thermoforming device for environmentally friendly biomass packaging materials introduced in Embodiment 1. The difference is that the telescopic component 23 in this embodiment is mainly composed of a movable rod 234, a buckle 235, and a spring 232. The movable rod 234 is located outside the limiting rod 22. The top end of the movable rod 234 is connected to the limiting plate 21, and the bottom end runs through the thermoforming table 1. The surface of the thermoforming table 1 has a hole for the movable rod 234 to pass through. The spring 232 is disposed on the outer periphery of the movable rod 234 and is located between the thermoforming table 1 and the limiting plate 21. The buckle 235 is engaged with the surface of the movable rod 234 and is located below the thermoforming table 1. When the buckle 235 contacts the thermoforming table 1, it can limit the limiting plate 21 from moving upward. The purpose of the buckle 235 is to limit the elastic range of the spring 232. In a specific implementation, the movable rod 234 has a toothed groove on its surface. The snap fastener 235 engages within the toothed groove to secure the movable rod 234. When released, the snap fastener 235 can move on the outer surface of the movable rod 234. This embodiment is faster than rotational adjustment.
[0042] This embodiment has the same beneficial effects as Embodiment 1.
[0043] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.
Claims
1. A thermoforming device for environmentally friendly biomass packaging materials, characterized in that, It includes: Hot press table (1); The limiting mechanism (2) includes a limiting plate (21), a limiting rod (22), and a telescopic member (23); at least two limiting plates (21) are located on the top of the hot press table (1) and are linearly distributed in the conveying direction of the packaging material on the hot press table (1); two limiting rods (22) are fixed to the bottom of the limiting plate (21) and run longitudinally through the hot press table (1), and the line connecting the two limiting rods (22) is perpendicular to the conveying direction of the packaging material on the hot press table (1); the telescopic member (23) is located outside the limiting rod (22) and is installed on the hot press table (1) to provide longitudinal elastic support for the limiting plate (21); The hot pressing mechanism (3) is installed on the hot pressing table (1) and located above the limiting mechanism (2). When the hot pressing part of the hot pressing mechanism (3) moves down to contact the limiting plate (21), the pressing speed is slowed down and used to hot press the packaging material.
2. The hot pressing molding equipment for environmentally friendly biomass packaging materials according to claim 1, characterized in that, The telescopic component (23) includes a screw (231), a limiting bolt (232), and a spring (233); the screw (231) is located outside the limiting rod (22), the top end of the screw (231) is connected to the limiting plate (21), and the bottom end runs through the hot press table (1); the spring (233) is set on the outer periphery of the screw (231) and is located between the hot press table (1) and the limiting plate (21); the limiting bolt (232) is threaded on the screw (231) and is located below the hot press table (1), and the limiting bolt (232) limits the longitudinal elastic distance of the limiting plate (21).
3. The hot pressing molding equipment for environmentally friendly biomass packaging materials according to claim 1, characterized in that, The telescopic component (23) includes a movable rod (234), a buckle (235), and a spring (233); the movable rod (234) is located outside the limiting rod (22), the top end of the movable rod (234) is connected to the limiting plate (21), and the bottom end runs through the hot press table (1); the spring (233) is set on the outer periphery of the movable rod (234) and is located between the hot press table (1) and the limiting plate (21); the buckle (235) is snapped onto the surface of the movable rod (234) and is located below the hot press table (1), and the buckle (235) limits the longitudinal elastic distance of the limiting plate (21).
4. The hot pressing molding equipment for environmentally friendly biomass packaging materials according to claim 1, characterized in that, The hot pressing mechanism (3) includes a support (31), a heating component (32), and a partition component (33); the support (31) is mounted on the hot pressing table (1), the heating component (32) is mounted longitudinally on the support (31), and the heating end faces the hot pressing table (1); the partition component (33) is horizontally arranged on the support (31), located between the heating component (32) and the hot pressing table (1), and blocks the heat of the heating component (32) from dissipating to the hot pressing table (1).
5. The hot pressing molding equipment for environmentally friendly biomass packaging materials according to claim 4, characterized in that, The heating assembly (32) includes a telescopic cylinder (321) and a hot press plate (322); the fixed end of the telescopic cylinder (321) is fixed to the top of the bracket (31), and the movable end faces downward and is connected to the hot press plate (322). The hot press plate (322) serves as the hot pressing part of the hot pressing mechanism (3), and has an array of heating coils and temperature sensors embedded inside.
6. The hot pressing molding equipment for environmentally friendly biomass packaging materials according to claim 5, characterized in that, The partition assembly (33) includes a linear slide module (331) and a heat insulation plate (332); the linear slide module (331) is horizontally mounted on the bracket (31), and the heat insulation plate (332) is connected to the movable end of the linear slide module (331); when the height of the hot press plate (322) is higher than the heat insulation plate (332), the heat insulation plate (332) moves to directly below the hot press plate (322).
7. The hot pressing molding equipment for environmentally friendly biomass packaging materials according to claim 6, characterized in that, A stabilizing plate (34) is connected to the side of the bracket (31) opposite to the linear slide module (331). The side of the stabilizing plate (34) facing the heat insulation plate (332) has a groove for accommodating the edge of the stabilizing plate (34).
8. The hot pressing molding equipment for environmentally friendly biomass packaging materials according to claim 7, characterized in that, The heat insulation plate (332) is provided with a ball bearing at the edge of the groove in the stabilizing plate (34), and the ball bearing is in contact with the groove in the stabilizing plate (34).
9. The hot pressing molding equipment for environmentally friendly biomass packaging materials according to claim 1, characterized in that, The surface of the hot press table (1) is provided with an anti-stick coating.
10. The hot pressing molding equipment for environmentally friendly biomass packaging materials according to claim 4, characterized in that, An image sensor for collecting the hot-pressing position of the packaging material is provided on the support (31) or the hot press table (1).