Plastic uptake process for preventing materials from being softened and adhered

Abstract

The invention relates to the field of plastic processing, in particular to a plastic uptake process for preventing materials from softening and sticking, which comprises the following steps: S1, manufacturing a sample: producing the sample of a product by using a plastic uptake machine and adopting a conventional plastic uptake process flow; s2, observing the sample and treating the pore plate: observing whether a sheet pasting part exists on the product sample obtained in the step S1 or not, and if so, scattering steel balls on the pore plate on two sides of the sheet pasting part; s3, pore plate debugging: continuously adjusting the number of the steel balls scattered on the pore plate until no sheet sticking phenomenon exists on the produced product sample; s4, product production: carrying out mass production on the product; and S5, die replacement is conducted, specifically, the steel balls on the pore plate are recycled through a dust collector, and a needed new die is replaced. According to the invention, the speed of adsorbing different parts of the softened sheet to the pore plate is controlled by scattering the steel balls on the pore plate, so that the sheet is firstly adsorbed to a mold part which is easy to adhere, and the product structure is uniform.

Description

Technical Field

[0001] The invention relates to the field of plastic processing, in particular to a blister process for preventing materials from softening and sticking. Background Art

[0002] Vacuum forming is an important processing technology for plastic molding. The main principle is to heat and soften the flat plastic hard sheet material, then use vacuum to absorb it on the mold surface, and then cool it to form it. When the vacuum forming machine is in use, if the mold is high or the shapes of different parts are very different, it is easy for the sheets in different parts to fit the mold in a different order. The first sheet has been finalized, resulting in the area of ​​the sheet in the later part being much larger than the area of ​​the mold at that location, resulting in the phenomenon of sheet sticking, forming a structure similar to the shape of a reinforcing rib, which is not required for vacuum forming, resulting in unqualified products. For example, when the mold is a high rectangular parallelepiped, when the mold lifts up the softened sheet and starts to evacuate, the sheet will be successively adsorbed on the long side, short side, and corner of the rectangular parallelepiped. When it is adsorbed to the corner, it is easy for the sheet to stick due to excessive excess; if the last adsorbed part can be changed to the long side, due to the larger size of the long side, even if the sheet has excess, it is easier to evenly shrink and digest the excess under the action of suction, and no sticking will occur. Summary of the invention

[0003] In view of the problems existing in the existing vacuum forming technology mentioned in the background technology, the present invention controls the speed at which different parts of the softened sheet are adsorbed to the orifice plate by sprinkling steel balls on the orifice plate, thereby first adsorbing the sheet to the mold parts prone to sticking, avoiding the formation of a structure similar to a reinforcing rib, and making the product structure uniform.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a blister process for preventing material softening and sticking, comprising the following steps:

[0005] S1. Make samples: Place the sheet on the orifice plate of the blister machine, use a clamping device to clamp the sheet, then use a heating device to heat and soften the sheet, use a lifting device to push the mold upward, use a suction pump to adsorb the softened sheet to the mold and the orifice plate, then remove the heating device to cool the molded product, and demold the product. This step is to use the blister machine and adopt a conventional blister process to produce a sample of the product.

[0006] S2. Observe the sample and process the orifice plate: Observe whether there is a part where the sheet is pasted on the product sample obtained in step S1. If so, observe and determine the position of the part on the mold and the orifice plate, and sprinkle steel balls on the orifice plate on both sides of the position, and then spread the steel balls evenly so that all the steel balls enter the holes of the orifice plate.

[0007] S3, orifice plate debugging: Use the orifice plate obtained in step S2 to perform the operation of step S1 to make a sample again, and observe whether the remade sample has returned to normal at the location where the original sheet was pasted. If not, increase the number of steel balls set on the orifice plates on both sides of the sheet pasting location in step S2, and then repeat steps S1 to S2 until the product obtained after executing step S1 returns to normal at the location where the original sheet was pasted. In this step, if too many steel balls are placed or scattered in the wrong place, the steel balls can be sucked away with a vacuum cleaner and reused.

[0008] S4, product production: use the orifice plate obtained in step S3 to perform the operation of step S1, and cut and store the product obtained in step S1. This step is the mass production of the product.

[0009] S5. Replace the mold: When it is necessary to replace other molds for production, use a vacuum cleaner to suck away all the steel balls on the orifice plate and recycle them, and replace the original mold with a new mold. If the product produced by the new mold has no quality problems, it will be produced normally. If there is a problem with sheet sticking, repeat steps S1 to S4.

[0010] Steps S1 to S5 need to be implemented with the help of a blister machine, which includes a frame, a lifting device, a perforated plate, a mold, a shrinkage chamber, a heating device, a pressing device, a vacuum cleaner and steel balls; the interior of the frame is a hollow structure, and an air suction pump is arranged in the frame; the lifting device is arranged at the bottom of the inner cavity of the frame; the perforated plate is arranged on the top of the lifting device, and through holes are evenly arranged on the perforated plate; the mold is arranged on the perforated plate; the shrinkage chamber is arranged at the upper rear of the frame; the heating device is arranged above the frame and the rear end of the heating device is slidably connected to the shrinkage chamber; the pressing device is arranged on the top of the frame; the vacuum cleaner is mounted on the side wall of the frame; and the steel balls are located in the through holes of some perforated plates.

[0011] Preferably, a blowing device is also provided at the bottom of the inner cavity of the frame to assist the mold in lifting the softened sheet.

[0012] Preferably, the bottom diameter of the through hole arranged on the orifice plate is smaller than the top diameter; after the steel ball is placed in the through hole of the orifice plate, the height of the top of the steel ball is not higher than the height of the top surface of the orifice plate, so that the sheet material is not easy to contact and stick to the steel ball during the adsorption process, thereby sticking the steel ball away.

[0013] Preferably, the orifice plate is made of ferromagnetic material that can be attracted by a magnet, such as stainless steel. An electromagnet is provided on the bottom surface of the orifice plate. The electromagnet works during the sheet adsorption and demoulding process to prevent the steel balls from being stuck to the sheet.

[0014] The beneficial effects of the present invention are:

[0015] (1) The present invention controls the distribution of the through holes of the orifice plate by sprinkling steel beads on the orifice plate, thereby controlling the adsorption force of different parts on the sheet. The sheet near the unblocked through holes will be adsorbed first and can approach the mold faster, so that the sheet is first adsorbed to the mold part that is prone to sticking, avoiding the formation of a structure similar to a reinforcing rib, making the product structure uniform.

[0016] (2) Steel ball materials are easy to obtain and can be reused. After the steel balls are sprinkled on a mold each time, they can be used without maintenance until a new mold is needed, and the use and maintenance costs are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flow chart of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall structure of a blister machine used by the present invention;

[0019] Figure 3 yes Figure 2 Schematic diagram of the structure of the center hole plate and steel ball. DETAILED DESCRIPTION

[0020] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0021] like Figure 1 A blister process for preventing material softening and pasting in this embodiment includes the following steps:

[0022] S1. Making samples: placing the sheet on the orifice plate 3 of the blister machine, using the pressing device 5 to press the sheet, then using the heating device 6 to heat and soften the sheet, using the lifting device 2 to push the mold 4 upward, using the suction pump to adsorb the softened sheet to the mold 4 and the orifice plate 3, then removing the heating device 6 to cool the molded product, and demolding the product. This step is to use the blister machine and adopt the conventional blister process to produce a sample of the product.

[0023] S2. Observe the sample and process the orifice plate: Observe whether there is a part where the sheet is pasted on the product sample obtained in step S1. If so, observe and determine the position of the part on the mold 4 and the orifice plate 3, and sprinkle steel balls 9 on the orifice plate 3 on both sides of the position, and then spread the steel balls 9 evenly so that all the steel balls 9 enter the holes of the orifice plate 3.

[0024] S3, orifice plate debugging: Use the orifice plate 3 obtained in step S2 to perform the operation of step S1 to make a sample again, and observe whether the remade sample has returned to normal at the location where the original sheet was pasted. If not, increase the number of steel balls 9 set on the orifice plate 3 on both sides of the sheet pasting location in step S2, and then repeat steps S1 to S2 until the product obtained after executing step S1 returns to normal at the location where the original sheet was pasted. In this step, if too many steel balls are placed or scattered in the wrong place, the steel balls can be sucked away with a vacuum cleaner and reused.

[0025] S4, product production: use the orifice plate 3 obtained in step S3 to perform the operation of step S1, and cut and store the product obtained in step S1. This step is the mass production of the product.

[0026] S5. Replace the mold: When it is necessary to replace other molds for production, use the vacuum cleaner 8 to suck away all the steel balls 9 on the orifice plate for recycling, and replace the original mold with a new mold. If the product produced by the new mold has no quality problems, normal production is carried out. If there is a problem with sheet sticking, repeat steps S1 to S4.

[0027] like Figure 2 , Figure 3 Steps S1 to S5 need to be implemented with the aid of a blister machine, which includes a frame 1, a lifting device 2, a perforated plate 3, a mold 4, a shrinkage chamber 5, a heating device 6, a pressing device 7, a vacuum cleaner 8 and a steel ball 9; the frame 1 is hollow in structure, an air pump is provided in the frame 1, and a blowing device is also provided at the bottom of the inner cavity of the frame 1 to assist the mold in lifting the softened sheet; the lifting device 2 is provided at the bottom of the inner cavity of the frame 1; the perforated plate 3 is provided at the top of the lifting device 2, and the perforated plate 3 is evenly provided with There is a through hole, the orifice plate 3 is made of stainless steel, and an electromagnet 10 is arranged on the bottom surface of the orifice plate 3. The electromagnet works during the sheet adsorption and demoulding process to prevent the steel balls from being stuck to the sheet; the mold 4 is arranged on the orifice plate 3; the shrinkage chamber 5 is arranged above the rear of the frame 1; the heating device 6 is arranged above the frame 1 and the rear end of the heating device 6 is slidably connected to the shrinkage chamber 5; the clamping device 7 is arranged on the top of the frame 1; the vacuum cleaner 8 is mounted on the side wall of the frame 1; the steel balls 9 are located in the through holes of some orifice plates 3.

[0028] like Figure 3 The bottom diameter of the through hole arranged on the orifice plate 3 is smaller than the top diameter; after the steel ball 9 is placed in the through hole of the orifice plate 3, the height of the top of the steel ball 9 is not higher than the height of the top surface of the orifice plate 3, so that the sheet material is not easy to contact and stick to the steel ball during the adsorption process, thereby sticking the steel ball away.

[0029] It should be understood that the above are only preferred embodiments of the present invention, and the patent scope of the present invention cannot be limited thereto. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A blister process for preventing material softening and sticking, characterized in that The following steps are involved: S1. Sample preparation: placing a sheet on the orifice plate (3) of a vacuum forming machine, using a pressing device (5) to press the sheet, then using a heating device (6) to heat and soften the sheet, using a lifting device (2) to push the mold (4) upward, using a suction pump to absorb the softened sheet onto the mold (4) and the orifice plate (3), then removing the heating device (6) to cool the molded product, and demolding the product; S2. Observe the sample and process the orifice plate: observe whether there is a portion where the sheet is pasted on the product obtained in step S1. If there is, observe and determine the position of the portion on the mold (4) and the orifice plate (3), and sprinkle steel balls (9) on the orifice plate (3) on both sides of the position, and then spread the steel balls (9) evenly so that all the steel balls (9) enter the holes of the orifice plate (3); S3, orifice plate debugging: use the orifice plate (3) obtained in step S2 to perform the operation of step S1, and observe whether the product obtained after the operation returns to normal at the location where the sheet material was originally pasted. If not, increase the number of steel balls (9) set on the orifice plates (3) on both sides of the location where the sheet material was pasted in step S2, and then repeat steps S1 to S2 until the product obtained after executing step S1 returns to normal at the location where the sheet material was originally pasted; S4, product production: using the orifice plate (3) obtained in step S3 to perform the operation of step S1, and cutting and storing the product obtained in step S1; S5, replacing the mold: when it is necessary to replace other molds for production, use a vacuum cleaner (8) to suck away all the steel balls (9) on the orifice plate for recycling, and replace the original mold with a new mold. If the product produced by the new mold has no quality problems, normal production is carried out. If there is a problem with sheet sticking, repeat steps S1 to S4; Steps S1 to S5 need to be implemented with the aid of a blister machine, which comprises a frame (1), a lifting device (2), a perforated plate (3), a mold (4), a shrinkage chamber (5), a heating device (6), a pressing device (7), a vacuum cleaner (8) and a steel ball (9); the frame (1) is hollow in structure, and an air suction pump is arranged in the frame (1); the lifting device (2) is arranged at the bottom of the inner cavity of the frame (1); the perforated plate (3) is arranged at the top of the lifting device (2), and the perforated plate (3) is evenly provided with through holes; the mold (4) is arranged on the perforated plate (3); the shrinkage chamber (5) is arranged at the upper rear of the frame (1); the heating device (6) is arranged above the frame (1) and the rear end of the heating device (6) is slidably connected to the shrinkage chamber (5); the pressing device (7) is arranged at the top of the frame (1); the vacuum cleaner (8) is mounted on the side wall of the frame (1); and the steel ball (9) is located in the through holes of some of the perforated plates (3).

2. The blister process for preventing material softening and pasting according to claim 1, characterized in that: An air blowing device is also provided at the bottom of the inner cavity of the frame (1).

3. The blister process for preventing material softening and pasting according to claim 1, characterized in that: The bottom diameter of the through hole provided on the orifice plate (3) is smaller than the top diameter; after the steel ball (9) is placed in the through hole of the orifice plate (3), the height of the top of the steel ball (9) is not higher than the height of the top surface of the orifice plate (3).

4. The blister process for preventing material softening and pasting according to claim 1, characterized in that: The orifice plate (3) is made of ferromagnetic material, and an electromagnet (10) is arranged on the bottom surface of the orifice plate (3).

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