Medical vacuum plastic uptake forming mold
By using a release film, electromagnet clamping, and airbag expansion assembly in a vacuum forming mold, the problems of plastic film sticking and sagging during continuous production are solved, achieving efficient and stable production and complex curved surface forming.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-29
- Publication Date
- 2026-04-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In traditional vacuum forming technology, during continuous production, the softened plastic film tends to stick together and sag, resulting in uneven thickness and affecting product quality and precision.
A separator is used to physically separate multiple layers of softened plastic film, and the film is transported and formed by electromagnet clamping and airbag expansion components to ensure the film is flat and has a uniform thickness.
It enables continuous production, improves production efficiency, prevents film sticking and sagging, ensures product flatness and thickness uniformity, and meets the molding requirements of complex curved surfaces.
Smart Images
Figure CN121848651A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vacuum forming technology, and more particularly to a medical vacuum forming mold. Background Technology
[0002] Vacuum forming is a plastic processing technology widely used in the packaging of medical, food, and electronic products. Its basic principle involves heating a thermoplastic sheet to a softened state, then applying vacuum pressure through a mold to force it to adhere tightly to the mold surface. After cooling and solidification, a plastic product conforming to the mold's shape is obtained. In the medical field, this process is often used to produce blister packs, sterile instrument trays, and blister packs—products requiring high hygiene and precision.
[0003] However, traditional vacuum forming technology faces technical challenges in industrialized continuous production, particularly when handling softened plastic film. To achieve continuous production, large rolls of plastic film typically require preheating and softening. During winding, storage, and unwinding, the softened plastic film, being in a molten or semi-molten state, is highly susceptible to adhesion between layers under pressure. This adhesion not only damages the film surface, affecting the appearance and quality of the finished product, but can also, in severe cases, tear the film layers, causing production interruptions and material waste.
[0004] The strength and rigidity of the plastic film softened by heating decrease significantly. During horizontal or long-distance transport, the plastic film inevitably sags under its own weight. This sagging leads to inconsistent stretching in different areas of the plastic film, resulting in an uneven thickness distribution before entering the mold. During molding, thinner areas are more prone to overstretching and even tearing, while thicker areas may cool unevenly, affecting the dimensional accuracy and mechanical property consistency of the product. This is a fatal flaw for precision medical device trays that require uniform wall thickness. Summary of the Invention
[0005] This invention addresses the technical problems existing in the prior art by providing a medical vacuum forming mold. It solves the problems of softened plastic films easily sticking together during winding, and the plastic film laid flat on the mold easily sagging under its own weight, leading to uneven thickness. The invention effectively prevents the softened plastic films from sticking together by using a release liner to physically separate multiple layers of softened plastic film during winding and unwinding. This allows the device to preheat the plastic film and continuously wind and unwind, achieving continuous production and greatly improving production efficiency. Furthermore, it effectively prevents the plastic film from sagging during transport. During transport, the softened plastic film remains flat on the taut release liner, supported by it. This ensures that the plastic film maintains a flat and uniform thickness before entering the mold area, avoiding localized thinning caused by sagging.
[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a medical vacuum forming mold, comprising a forming component and a conveying component; The molded components include a base; The conveying components are mounted on the base; The conveying assembly includes conveyor component one, conveyor component two, a separating membrane, an iron plate, and electromagnet two; The conveyor component includes a slider, a mounting port, and a mounting rope plate; An installation port is opened through the side of the slider, and the installation rope plate is fixed inside the installation port; Iron plates and automatic winding devices are fixed at both ends of the isolation membrane, and the automatic winding device is set inside the slider. Conveyor component one and conveyor component two have the same structure; Electromagnet 2 is fixed to one side of the slider inside conveyor 2; The separator membrane is used to separate and transport softened plastic film, which is then laid flat on the separator membrane. When the plastic film is vacuum-formed, the corresponding electromagnet is de-energized, and the automatic winding device winds up the release film.
[0007] As an improvement, there are multiple sliders, which are arranged at intervals along the length of the mounting rope plate. The number of sliders inside conveyor component two is the same as the number of sliders inside conveyor component one. The separator is made of rubber. The number of the isolation membrane, iron plate, and electromagnet is consistent with the number of sliders inside the conveying component, and they correspond one-to-one.
[0008] As an improvement, the molding assembly also includes a feeding support, a heater, and a discharging support; The material feeding support components include a storage frame, a vertical plate, and a motor; The storage frame is a rectangular frame structure, with uprights fixed to the storage frame and the motor fixed to one side of the storage frame; The loading support and unloading support have the same structure and are symmetrically fixed on the base; The heater is fixed inside the storage frame of the feeding support. The heater is used to heat and soften the plastic film to be processed and to keep it continuously warm.
[0009] As an improvement, the molding assembly also includes a mounting plate, an upper mold component, and a lower mold component; The mounting plate is fixed between the vertical plates inside the feeding support and the unloading support; The upper mold component includes telescopic rod one, upper mold, extension plate, telescopic rod two, and cutting blade; One telescopic rod is fixed to the lower side of the mounting plate, and the upper mold is fixed to the lower end of the telescopic rod. There are two extension plates, which are symmetrically fixed on both sides of the upper mold. The second telescopic rod is fixed on the lower side of the extension plate. The cutting blade is ring-shaped and fixed at the output end of the second telescopic rod. The lower mold components include the telescopic rod, the lower mold, and the cutting frame; The telescopic rod is fixed to the base, the lower mold is fixed to the upper end of the telescopic rod, and the cutting frame is ring-shaped and fixed to the outer ring of the lower mold. The width of the plastic film to be processed is greater than the width of the cutting frame; The lower mold component is located between the upper and lower support components, with the lower mold component directly below the conveying assembly and the upper mold component directly above the conveying assembly. When the upper mold is lowered by telescopic rod one and the lower mold is raised by telescopic rod three, the cutting blade cuts the plastic film, and the upper and lower molds clamp the cut plastic film.
[0010] As an improvement, the molding assembly also includes a limiting component; The limiting components include a limiting frame, a groove, a sliding block, and a fixing plate; There are two limiting components, corresponding to conveyor component one and conveyor component two respectively; Two limiting components are symmetrically arranged on both sides of the conveying assembly; There are two fixing plates, which are fixed to both ends of the limit frame and to the vertical plates inside the loading support and unloading support respectively. The limit frame has a groove on the side near the conveying component, and there are two sliding blocks, which are respectively set on the upper and lower sides of the groove; The sliders inside both conveyor component one and conveyor component two are slidably set in the grooves of the corresponding limiting components.
[0011] As an improvement, the conveyor also includes a chute; The slider has grooves at both the top and bottom that fit the sliding block, and the sliding block is slidably positioned within the grooves. The conveying assembly also includes two conveying rollers, which are detachably installed in the vertical plates of the loading support and the unloading support, respectively. The two ends of the mounting rope plate can be detachably mounted on the two conveyor rollers respectively; The motor shaft is fixed on the conveyor roller, and the motor is used to drive the conveyor roller to rotate; The conveyor rollers inside the feeding support are used for rotating and feeding materials, while the conveyor rollers inside the unloading support are used for winding up waste materials.
[0012] As an improvement, the conveying assembly also includes clamping groups, the number of which is the same as the number of separator membranes, and they correspond one-to-one. The clamping assembly includes an electromagnet, and a single clamping assembly includes multiple electromagnets, which are evenly spaced on both sides of the isolation membrane. When the electromagnets on the sides of adjacent insulating membranes are attracted to each other, they clamp the plastic membranes together and transport them.
[0013] As an improvement, the conveying assembly also includes an expansion group; The number of expansion units corresponds to the number of isolation membranes, and they are one-to-one. The expansion group includes airbags, and a single expansion group includes multiple airbags, which are uniformly fixed on the isolation membrane along the length of the isolation membrane. The expansion components include an air pump unit, an air delivery unit, a telescopic rod four, a connecting pipe one, a connecting pipe two, and a push plate; The isolation membrane and the iron plate have two connecting tubes inside. The number of connecting tubes is the same as the number of airbags, and they correspond one-to-one. The connecting tubes are connected to the airbags. Both the slider inside the second conveyor and the electromagnet inside the second conveyor have a connecting pipe. The number of connecting pipes is the same as the number of connecting pipes in a single isolation membrane, and they correspond one-to-one. When the iron plate is attracted to the electromagnet, the connecting tube 1 and the connecting tube 2 are connected. The air pump unit is fixed to the side of the base; The fourth telescopic rod is fixed at the deepest part of the groove, and the push plate is fixed at the output end of the fourth telescopic rod. The number of air delivery units is consistent with the number of sliders located in the groove during a single vacuum forming of the plastic film, and they correspond one-to-one. The gas transmission group includes gas transmission pipes. The number of gas transmission pipes in a single gas transmission group is the same as the number of connecting pipes in a single isolation membrane, and they correspond one-to-one. One end of the gas delivery pipe is fixed to one side of the push plate, and the gas delivery pipe passes through the push plate. The end of the gas delivery pipe away from the push plate passes through the limiting bracket and is fixed to the output end of the gas pump in the gas pump unit; The number of air pumps in the air pump group is consistent with the total number of air delivery pipes in multiple air delivery groups, and they correspond one-to-one.
[0014] As an improvement, the gas pipeline is a flexible tube; When the slider stops conveying, the telescopic rod four drives the push plate to move, so that the push plate fits against the slider, and the air supply pipe connects with the corresponding connecting pipe one; The push plate, telescopic rod four, and air supply pipe are all set in the limiting frame of the sliding block connection inside the conveying component two.
[0015] In addition, the present invention also provides an application of a medical vacuum forming mold in the field of vacuum forming.
[0016] The beneficial effects of this invention are as follows: Firstly, it effectively prevents the softened plastic films from sticking together. By introducing a release film, the multiple layers of softened plastic films are physically separated during winding and unwinding, allowing the device to preheat the plastic films and continuously wind and unwind them, thus achieving continuous production and greatly improving production efficiency. Secondly, it effectively prevents the plastic films from sagging due to gravity during transportation. During transportation, the softened plastic films are always laid flat on the taut release film and supported by it. This ensures that the plastic films maintain a flat and uniform thickness before entering the mold area, avoiding localized stretching and thinning caused by sagging. Secondly, clamping groups composed of electromagnets are set on both sides of the separator film. By controlling the attraction of electromagnets on adjacent separator films, multi-point clamping ensures that the plastic film will not slide left or right or wrinkle when moving with the separator film, maintaining precise alignment; preventing traction breakage. When rolling up waste material and pulling new plastic film to lay flat, the clamping force is evenly distributed, avoiding excessive local stress that could cause the soft plastic film to break, thus ensuring the continuity and stability of the production process. Thirdly, it enables proactive control of the local thickness of the product. When the product design requires a thinner area, the corresponding airbag can be inflated. During vacuum forming, the plastic film in that area will be pre-stretched, thereby achieving local thinning. For complex curved surfaces, such as deep cavity products, by controlling the expansion degree of the airbags in different areas, the stretching direction of the plastic film can be actively guided, so that the material is more rationally distributed to the required position, avoiding excessive thinning in certain areas, thereby obtaining complex curved surface products with a more uniform overall thickness. Attached Figure Description
[0017] Figure 1 This is a three-dimensional cross-section of the present invention. Figure 1 ; Figure 2 This is a three-dimensional cross-section of the present invention. Figure 2 ; Figure 3 This is a perspective view of the present invention; Figure 4 This is a schematic diagram illustrating the installation and winding of the separator film of the present invention; Figure 5 This is a schematic diagram of the installation of the electromagnet II of the present invention; Figure 6 This is a schematic diagram of the slider sliding of the present invention; Figure 7 This is a schematic diagram of the installation of the electromagnet of the present invention; Figure 8 This is a schematic diagram of the electromagnets of the present invention attracting each other; Figure 9 This is a schematic diagram of the installation of the expansion component of the present invention; Figure 10 This is a schematic diagram of the push plate installation of the present invention; Figure 11This is a schematic diagram of the airbag installation of the present invention; Figure 12 This is a schematic diagram of the installation of the connecting pipe of the present invention; Figure 13 This is a schematic diagram of the installation of the connecting pipe 2 of the present invention.
[0018] The attached diagram lists the components represented by each number as follows: 100. Molding component; 110. Base; 120. Feeding support; 121. Storage frame; 122. Vertical plate; 123. Motor; 130. Mounting plate; 140. Upper mold component; 141. Telescopic rod one; 142. Upper mold; 143. Extension plate; 144. Telescopic rod two; 145. Cutting blade; 150. Limiting component; 151. Limiting frame; 152. Groove; 153. Sliding block; 154. Fixing plate; 160. Lower mold component; 161. Telescopic rod three; 162. Lower mold; 163. Cutting frame; 1 70. Heater; 180. Feeding support; 200. Conveying assembly; 210. Conveying roller; 220. Conveying component one; 221. Slider; 222. Mounting port; 223. Mounting rope plate; 224. Slide chute; 230. Conveying component two; 240. Isolation membrane; 250. Iron plate; 260. Electromagnet one; 270. Airbag; 280. Expansion component; 281. Air pump set; 282. Air supply pipe; 283. Telescopic rod four; 284. Connecting pipe one; 285. Connecting pipe two; 286. Push plate; 290. Electromagnet two. Detailed Implementation
[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0020] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0021] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.
[0022] Example 1: As Figures 1-6 As shown, this application discloses a medical vacuum forming mold, including a forming component 100 and a conveying component 200; The molding assembly 100 includes a base 110, a feeding support 120, a mounting plate 130, an upper mold component 140, a limiting component 150, a lower mold component 160, a heater 170, and a feeding support 180. The conveying assembly 200 is mounted on the base 110; The conveying assembly 200 includes a first conveyor 220, a second conveyor 230, a separating membrane 240, an iron plate 250, and a second electromagnet 290; Conveying component 220 includes a slider 221, a mounting port 222, and a mounting rope plate 223; The slider 221 has a through mounting opening 222 on its side, and the mounting rope plate 223 is fixed inside the mounting opening 222; There are multiple sliders 221, which are arranged at intervals along the length of the mounting rope plate 223; The iron plate 250 and the automatic winding device are fixed at both ends of the isolation membrane 240, and the automatic winding device is set inside the slider 221. Specifically, the automatic rewinder within slider 221 is used to rewind the release film 240.
[0023] Conveyor component 220 and conveyor component 230 have the same structure; The number of sliders 221 inside conveyor component 230 is the same as the number of sliders 221 inside conveyor component 1 220; Electromagnet 290 is fixed to one side of slider 221 inside conveyor 230; The separator 240 is made of rubber. The number of the isolation membrane 240, iron plate 250 and electromagnet 290 is consistent with the number of sliders 221 inside the conveying component 220, and they correspond one-to-one.
[0024] The separator membrane 240 is used to separate and transport the softened plastic film, which is laid flat on the separator membrane 240. When the plastic film is vacuum-formed, the corresponding electromagnet 290 is de-energized, and the automatic winding device winds up the release film 240.
[0025] Specifically, the plastic film and the separator 240 are rolled up together to form a roller, and the softened plastic film is separated from each other by the separator 240 to prevent the softened plastic film from sticking to each other; and corn starch can be evenly sprinkled on the separator 240 to improve the effect of preventing sticking. During the vacuum forming of the plastic film, the plastic film and the release liner 240 are conveyed together to ensure that the plastic film does not fall due to gravity, resulting in uneven thickness distribution in different areas. When the plastic film needs to be vacuum formed, the corresponding electromagnet 290 is de-energized, and the automatic winding device quickly winds up the release liner 240 to avoid the release liner 240 from obstructing the vacuum forming of the plastic film.
[0026] The feeding support component 120 includes a storage frame 121, an upright plate 122, and a motor 123; The storage frame 121 is a rectangular frame structure, the upright plate 122 is fixed on the storage frame 121, and the motor 123 is fixed on one side of the storage frame 121. The feeding support 120 and the unloading support 180 have the same structure and are symmetrically fixed on the base 110; The heater 170 is fixed inside the storage frame 121 of the feeding support 120. The heater 170 is used to heat and soften the plastic film to be processed and to keep it continuously warm.
[0027] Specifically, the heater 170 heats and softens the plastic film to be processed and keeps it at a constant temperature, ensuring that the device can operate efficiently and that production efficiency will not be reduced due to the need for continuous intermittent heating and softening of the plastic film.
[0028] The mounting plate 130 is fixed between the upright plate 122 inside the feeding support 120 and the unloading support 180; The upper mold component 140 includes a first telescopic rod 141, an upper mold 142, an extension plate 143, a second telescopic rod 144, and a cutting blade 145; Telescopic rod 141 is fixed to the lower side of mounting plate 130, and upper mold 142 is fixed to the lower end of telescopic rod 141; There are two extension plates 143, which are symmetrically fixed on both sides of the upper mold 142. The second telescopic rod 144 is fixed on the lower side of the extension plate 143. The cutting blade 145 is ring-shaped and fixed at the output end of the second telescopic rod 144. The lower mold component 160 includes a telescopic rod 161, a lower mold 162, and a cutting frame 163; Telescopic rod 161 is fixed on base 110, lower mold 162 is fixed on the upper end of telescopic rod 161, cutting frame 163 is annular and fixed on the outer ring of lower mold 162; The width of the plastic film to be processed is greater than the width of the cutting frame 163; The lower mold component 160 is located between the upper support component 120 and the lower support component 180, and the lower mold component 160 is located directly below the conveying assembly 200, while the upper mold component 140 is located directly above the conveying assembly 200. When the upper mold 142 is driven to descend by the telescopic rod 141 and the lower mold 162 is driven to rise by the telescopic rod 3 161, the cutting blade 145 cuts the plastic film, and the upper mold 142 and the lower mold 162 clamp the cut plastic film.
[0029] Specifically, after the plastic film is fully unfolded, the lower mold 162 is raised by the telescopic rod 3 161, and the upper mold 142 is lowered by the telescopic rod 1 141. When the lower mold 162 is 5 cm away from the plastic film, the corresponding electromagnet 290 is de-energized, and the automatic winding device quickly winds up the release film 240. The plastic film is laid flat on the upper surface of the lower mold 162, and the upper mold 142 and the lower mold 162 clamp and fix the plastic film in position. The cutting blade 145 cuts the plastic film in a ring shape, separating it from the waste material. The cut plastic film is then processed by the upper mold 142 and the lower mold 162 to form the desired plastic product. The processed plastic product is then manually removed.
[0030] The limiting component 150 includes a limiting frame 151, a groove 152, a sliding block 153, and a fixing plate 154; There are two limiting components 150, which correspond to conveyor component 1 220 and conveyor component 230 respectively; Two limiting components 150 are symmetrically arranged on both sides of the conveying assembly 200; There are two fixing plates 154. The two fixing plates 154 are respectively fixed at both ends of the limiting frame 151. The two fixing plates 154 are respectively fixed on the upright plate 122 inside the feeding support 120 and the unloading support 180. The limit frame 151 has a groove 152 on the side near the conveying assembly 200, and there are two sliding blocks 153, which are respectively set on the upper and lower sides of the groove 152. The sliders 221 of both conveyor 1 220 and conveyor 2 230 are slidably disposed in the grooves 152 of the corresponding limiting member 150.
[0031] Specifically, the groove 152 and the sliding block 153 restrict the position of the slider 221 to ensure that the isolation film 240 and the plastic film can be transported smoothly.
[0032] Conveyor component 220 also includes a chute 224; The slider 221 has grooves 224 on both the top and bottom that are adapted to the slider block 153, and the slider block 153 is slidably disposed in the grooves 224; The conveying assembly 200 also includes two conveying rollers 210, which are respectively detachably installed in the vertical plates 122 of the loading support 120 and the unloading support 180. Specifically, after the plastic film wound up inside the conveying assembly 200 is processed, the conveying roller 210 can be detached and a new conveying assembly 200 can be replaced for continued processing.
[0033] The two ends of the mounting rope plate 223 are detachably mounted on the two conveying rollers 210.
[0034] Specifically, the conveyor roller 210 is used to wind up the first conveyor 220, the second conveyor 230, the separator 240, and the plastic film.
[0035] The shaft of motor 123 is fixed on conveyor roller 210, and motor 123 is used to drive conveyor roller 210 to rotate; The conveying roller 210 inside the feeding support 120 is used for rotating and feeding material, and the conveying roller 210 inside the unloading support 180 is used for winding up waste material.
[0036] Specifically, before thermoforming, conveyor component 1 220, conveyor component 230, release film 240, and plastic film are all wound onto a single conveyor roller 210. When thermoforming is required, two conveyor rollers 210 are installed in the loading support 120 and unloading support 180, respectively, and are driven to rotate by a motor 123. A section of conveyor component 1 220, conveyor component 230, and release film 240 wound onto the conveyor roller 210 in the loading support 120 is manually removed. Conveyor component 1 220 and conveyor component 230 are then manually slid into the groove 152 and fixed onto the conveyor roller 210 in the unloading support 180 using a rope plate 223. This facilitates the subsequent pulling and conveying of conveyor component 1 220 and conveyor component 230. During the processing, the waste material generated after the cutting blade 145 cuts is also collected by the conveying roller 210 in the feeding support 180. When the waste material is collected by the conveying roller 210 in the feeding support 180, since the cutting blade 145 does not cut and separate the waste material from the raw material, the new raw material can also be pulled out and laid flat during the process of pulling the waste material, which is convenient for continued processing.
[0037] Telescopic pole 1 (141), telescopic pole 2 (144), and telescopic pole 3 (161) are all electric telescopic poles. Telescopic rod 141, telescopic rod 2 144, telescopic rod 3 161, upper mold 142, and lower mold 162 are all existing technologies and will not be described in detail here.
[0038] In addition, the present invention also provides an application of a medical vacuum forming mold in the field of vacuum forming.
[0039] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: Effectively preventing the softened plastic films from sticking together, the release liner 240 physically separates the multiple layers of softened plastic films during winding and unwinding, allowing the device to preheat the plastic films and continuously wind and unwind them, thus achieving continuous production and greatly improving production efficiency. It also effectively prevents the plastic films from sagging due to gravity during transport. During transport, the softened plastic films remain flat on the taut release liner 240 and are supported by it. This ensures that the plastic films maintain a flat and uniform thickness before entering the mold area, avoiding localized thinning caused by sagging.
[0040] Example 2: In the above embodiment, the waste material after plastic film processing is wound up by the rotation of the conveying roller 210 inside the feeding support 180. However, because the plastic film is relatively soft, it will deviate during winding. Furthermore, the winding process can also cause breakage due to the stretching of the plastic film after it has been cut. Therefore, the solution in Example 1 is improved as follows: Figures 7-8 As shown: The conveying assembly 200 also includes clamping groups, the number of which is the same as the number of the separating membranes 240, and they correspond one-to-one. The clamping assembly includes an electromagnet 260, and a single clamping assembly includes multiple electromagnets 260. The multiple electromagnets 260 are evenly spaced on both sides of the isolation membrane 240.
[0041] When the electromagnets 260 on the side where the adjacent isolation membranes 240 are close to each other attract each other, they clamp the plastic film together and transmit it.
[0042] Specifically, after processing is completed, the plastic film waste needs to be wound up by the rotation of the conveying roller 210 inside the material support 180. When the plastic film is pulled and laid flat again above the lower mold 162, the electromagnet 260 closest to the cutting surface is energized and moved away from each other, so that the edge of the cut plastic film can fall down between the two adjacent isolation films 240. Then, the electromagnet 260 between the two isolation films 240 changes its magnetic pole and attracts each other, clamping the plastic film at multiple points. The plastic film is conveyed together by the conveying components 220, 230, and 240, which prevents the plastic film from breaking or shifting during the conveying process.
[0043] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: Clamping groups consisting of electromagnets 260 are set on both sides of the separator 240. By controlling the attraction of electromagnets 260 on adjacent separators 240, multi-point clamping ensures that the plastic film will not slide left or right or wrinkle when moving with the separator 240, maintaining precise alignment; preventing traction breakage. When winding up waste material and pulling new plastic film to lay flat, the clamping force is evenly distributed, avoiding excessive local stress that could cause the soft plastic film to break, thus ensuring the continuity and stability of the production process.
[0044] Example 3: In the above embodiment, the isolation membrane 240 prevents the plastic film from sagging during use. However, on the same plastic product, different areas have varying thickness requirements, and the device cannot adjust according to these requirements. Furthermore, the isolation membrane 240 only provides simple support to prevent sagging, but for molds with complex curved surfaces, the plastic layer may not perfectly adhere to the non-horizontal surface of the mold cavity before vacuuming, resulting in uneven local stretching. Therefore, the solution in Example 2 is improved, such as... Figures 9-13 As shown: The conveying assembly 200 also includes an expansion group; The number of expansion groups is consistent with the number of isolation membranes 240, and they correspond one-to-one; The inflation group includes an airbag 270, and a single inflation group includes multiple airbags 270. The multiple airbags 270 are uniformly fixed on the isolation membrane 240 along the length direction of the isolation membrane 240. The expansion component 280 includes an air pump assembly 281, an air supply assembly, a telescopic rod 283, a connecting pipe 284, a connecting pipe 285, and a push plate 286; The isolation membrane 240 and the iron plate 250 are equipped with a connecting tube 285. The number of connecting tubes 285 is the same as the number of airbags 270, and they correspond one-to-one. The connecting tubes 285 are connected to the airbags 270. Both the slider 221 inside the second conveyor 230 and the electromagnet 290 are equipped with a first connecting pipe 284. The number of first connecting pipes 284 is the same as the number of second connecting pipes 285 in a single isolation membrane 240, and they correspond one-to-one. When the iron plate 250 is attracted to the electromagnet 290, the connecting tube 284 and the connecting tube 285 are connected. Air pump unit 281 is fixed to the side of base 110; The deepest part of the groove 152 is fixed with telescopic rod 283, and the output end of telescopic rod 283 is fixed with push plate 286. Specifically, telescopic pole 4283 is an electric telescopic pole, which is existing technology and will not be elaborated here.
[0045] The number of air supply units is consistent with the number of sliders 221 located in the groove 152 during single vacuum forming of the plastic film, and they correspond one-to-one. The gas transmission group includes gas transmission pipes 282. The number of gas transmission pipes 282 in a single gas transmission group is the same as the number of connecting pipes 285 in a single isolation membrane 240, and they correspond one-to-one. One end of the gas supply pipe 282 is fixed to one side of the push plate 286, and the gas supply pipe 282 is installed through the push plate 286. The end of the gas pipe 282 away from the push plate 286 passes through the limiting bracket 151 and is fixed to the gas pump output end inside the gas pump assembly 281; The number of air pumps in the air pump group 281 is consistent with the total number of air delivery pipes 282 in the multiple air delivery groups, and they correspond one-to-one. Specifically, when the product being produced has a requirement for different areas to have different thicknesses, the air pump in the air pump unit 281 controls the airbag 270 to expand, so that the stretching flow of the plastic layer in that area is actively guided, and the plastic film in the expanded area of the airbag 270 becomes thinner. When the product being manufactured has a complex curved surface, the stretching direction of the plastic layer can be actively guided by controlling the expansion of different areas of the airbag 270. When a large amount of plastic film needs to be evenly distributed on a complex curved surface, the stretching direction of the plastic layer can be controlled by controlling the expansion of the airbag 270, making the plastic film area that adheres to the complex curved surface thicker, thereby obtaining a final product with a more uniform thickness.
[0046] Gas pipe 282 is a flexible pipe; When slider 221 stops conveying, telescopic rod 283 drives push plate 286 to move, so that push plate 286 fits against slider 221, and air pipe 282 connects with corresponding connecting pipe 284. Specifically, after the slider 221 has moved to the correct position, the telescopic rod 283 drives the push plate 286 to move, so that the push plate 286 fits against the slider 221. At this time, the air supply pipe 282 is connected to the corresponding connecting pipe 284. Air is supplied through the air supply pipe 282, the connecting pipe 284, and the connecting pipe 285. Then, the corresponding air pump in the air pump group 281 can work to inflate the corresponding airbag 270.
[0047] The push plate 286, the telescopic rod 283 and the air supply pipe 282 are all installed in the limiting frame 151 that is slidably connected to the slider 221 inside the conveying component 230.
[0048] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: This technology enables proactive control of the local thickness of products. When the product design requires a thinner area, the corresponding airbag 270 can be inflated. During vacuum forming, the plastic film in that area will be pre-stretched, thus achieving localized thinning. For complex curved surfaces, such as deep cavity products, by controlling the expansion degree of the airbag 270 in different areas, the stretching flow of the plastic film can be actively guided, allowing the material to be more rationally distributed to the required positions, avoiding excessive thinning in certain areas, and thus obtaining complex curved surface products with a more uniform overall thickness.
[0049] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.
[0050] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. A medical vacuum forming mold, characterized in that, Includes a molding assembly (100) and a conveying assembly (200); The molding component (100) includes a base (110); The conveying assembly (200) is mounted on the base (110); The conveying assembly (200) includes a first conveyor (220), a second conveyor (230), a separating membrane (240), an iron plate (250), and a second electromagnet (290). The first conveyor (220) includes a slider (221), a mounting port (222) and a mounting rope plate (223); A mounting opening (222) is made through the side of the slider (221), and the mounting rope plate (223) is fixed inside the mounting opening (222); The iron plate (250) and the automatic winding device are fixed at both ends of the isolation membrane (240), and the automatic winding device is set inside the slider (221); Conveyor component one (220) and conveyor component two (230) have the same structure; Electromagnet 2 (290) is fixed to one side of slider (221) inside conveyor 2 (230); The separator (240) is used to separate and transport the softened plastic film, which is laid flat on the separator (240); When the plastic film is vacuum-formed, the corresponding electromagnet 2 (290) is de-energized, and the automatic rewinder rewinds the release film (240).
2. The medical vacuum forming mold according to claim 1, characterized in that, There are multiple sliders (221), which are arranged at intervals along the length of the mounting rope plate (223); The number of sliders (221) inside conveyor component two (230) is the same as the number of sliders (221) inside conveyor component one (220); The separator (240) is made of rubber. The number of the isolation membrane (240), iron plate (250) and electromagnet II (290) is consistent with the number of sliders (221) inside the conveying component I (220), and they correspond one-to-one.
3. The medical vacuum forming mold according to claim 1, characterized in that, The molding assembly (100) also includes a feeding support (120), a heater (170), and a discharging support (180). The feeding support component (120) includes a storage frame (121), a vertical plate (122), and a motor (123); The storage frame (121) is a rectangular frame structure, the upright plate (122) is fixed on the storage frame (121), and the motor (123) is fixed on one side of the storage frame (121); The loading support (120) and unloading support (180) have the same structure and are symmetrically fixed on the base (110); The heater (170) is fixed in the storage frame (121) of the feeding support (120). The heater (170) is used to heat and soften the plastic film to be processed and to keep it warm.
4. A medical vacuum forming mold according to claim 3, characterized in that, The molding assembly (100) also includes a mounting plate (130), an upper mold component (140), and a lower mold component (160). The mounting plate (130) is fixed between the upright plate (122) inside the loading support (120) and the unloading support (180); The upper mold component (140) includes a first telescopic rod (141), an upper mold (142), an extension plate (143), a second telescopic rod (144), and a cutting blade (145). Telescopic rod one (141) is fixed to the lower side of the mounting plate (130), and upper mold (142) is fixed to the lower end of telescopic rod one (141); There are two extension plates (143), which are symmetrically fixed on both sides of the upper mold (142). The second telescopic rod (144) is fixed on the lower side of the extension plate (143). The cutting blade (145) is ring-shaped and fixed at the output end of the second telescopic rod (144). The lower mold component (160) includes a telescopic rod three (161), a lower mold (162), and a cutting frame (163). Telescopic rod three (161) is fixed on base (110), lower mold (162) is fixed on the upper end of telescopic rod three (161), cutting frame (163) is ring-shaped, and cutting frame (163) is fixed on the outer ring of lower mold (162); The width of the plastic film to be processed is greater than the width of the cutting frame (163); The lower mold component (160) is located between the upper support component (120) and the lower support component (180), the lower mold component (160) is located directly below the conveying assembly (200), and the upper mold component (140) is located directly above the conveying assembly (200); When the upper mold (142) is driven to descend by the first telescopic rod (141) and the lower mold (162) is driven to rise by the third telescopic rod (161), the cutting blade (145) cuts the plastic film, and the upper mold (142) and the lower mold (162) clamp the cut plastic film.
5. A medical vacuum forming mold according to claim 4, characterized in that, The molding component (100) also includes a limiting element (150); The limiting component (150) includes a limiting frame (151), a groove (152), a sliding block (153), and a fixing plate (154). There are two limiting components (150), which correspond to conveyor one (220) and conveyor two (230) respectively; Two limiting members (150) are symmetrically arranged on both sides of the conveying assembly (200); There are two fixing plates (154). The two fixing plates (154) are fixed at both ends of the limiting frame (151) respectively. The two fixing plates (154) are fixed on the upright plate (122) inside the loading support (120) and the unloading support (180) respectively. The limit frame (151) has a groove (152) on the side near the conveying assembly (200), and there are two sliding blocks (153), which are respectively set on the upper and lower sides of the groove (152); The sliders (221) of both conveyor one (220) and conveyor two (230) are slidably disposed in the grooves (152) of the corresponding limiting members (150).
6. A medical vacuum forming mold according to claim 5, characterized in that, The first conveyor (220) also includes a chute (224); The slider (221) has grooves (224) on both the top and bottom that are adapted to the sliding block (153), and the sliding block (153) is slidably disposed in the grooves (224); The conveying assembly (200) also includes two conveying rollers (210), which are detachably installed in the vertical plates (122) of the loading support (120) and the unloading support (180), respectively. The two ends of the mounting rope plate (223) are detachably mounted on the two conveying rollers (210); The shaft of the motor (123) is fixed on the conveyor roller (210), and the motor (123) is used to drive the conveyor roller (210) to rotate; The conveying roller (210) inside the feeding support (120) is used for rotating and feeding material, and the conveying roller (210) inside the unloading support (180) is used for winding up waste material.
7. A medical vacuum forming mold according to claim 1, characterized in that, The conveying assembly (200) also includes clamping groups, the number of which is the same as the number of the separating membranes (240), and they correspond one-to-one; The clamping group includes an electromagnet (260), and a single clamping group includes multiple electromagnets (260). The multiple electromagnets (260) are evenly spaced on both sides of the isolation membrane (240). When the electromagnets (260) on the side where the adjacent isolation membranes (240) are close to each other attract each other, they clamp the plastic film together and transmit it.
8. A medical vacuum forming mold according to claim 7, characterized in that, The conveying assembly (200) also includes an expansion group; The number of expansion groups is consistent with the number of isolation membranes (240), and they correspond one-to-one; The inflation group includes an airbag (270), and a single inflation group includes multiple airbags (270). The multiple airbags (270) are uniformly fixed on the isolation membrane (240) along the length direction of the isolation membrane (240). The expansion component (280) includes an air pump assembly (281), an air supply assembly, a telescopic rod four (283), a connecting pipe one (284), a connecting pipe two (285), and a push plate (286). The isolation membrane (240) and the iron plate (250) are equipped with a connecting tube II (285). The number of connecting tube II (285) is the same as the number of airbags (270) and they correspond one to one. The connecting tube II (285) is connected to the airbags (270). The slider (221) inside the second conveyor (230) and the electromagnet (290) both have a connecting tube (284). The number of connecting tubes (284) is the same as the number of connecting tubes (285) in a single isolation membrane (240), and they correspond one to one. When the iron plate (250) is attracted to the electromagnet (290), the connecting pipe (284) is connected to the connecting pipe (285); The air pump assembly (281) is fixed to the side of the base (110); The deepest part of the groove (152) is fixed with telescopic rod four (283), and the output end of telescopic rod four (283) is fixed with push plate (286). The number of air supply units is consistent with the number of sliders (221) located in the groove (152) during the single vacuum forming of the plastic film, and they correspond one-to-one. The gas transmission group includes gas transmission pipes (282). The number of gas transmission pipes (282) in a single gas transmission group is consistent with the number of connecting pipes (285) in a single isolation membrane (240), and they correspond one-to-one. One end of the gas delivery pipe (282) is fixed to one side of the push plate (286), and the gas delivery pipe (282) is installed through the push plate (286); The end of the gas delivery pipe (282) away from the push plate (286) passes through the limiting bracket (151) and is fixed to the gas pump output end inside the gas pump assembly (281); The number of air pumps in the air pump group (281) is consistent with the total number of air delivery pipes (282) in the multiple air delivery groups, and they correspond one-to-one.
9. A medical vacuum forming mold according to claim 8, characterized in that, The gas pipeline (282) is a flexible tube; When the slider (221) stops conveying, the telescopic rod four (283) drives the push plate (286) to move, so that the push plate (286) fits against the slider (221), and the gas pipe (282) is connected to the corresponding connecting pipe one (284); The push plate (286), the telescopic rod four (283) and the gas supply pipe (282) are all located in the limit frame (151) that is slidably connected to the slider (221) inside the conveying component two (230).
10. The application of a medical vacuum forming mold as described in any one of claims 1 to 9 in the field of vacuum forming.