Acrylic sheet manufacturing process and manufacturing device thereof

Abstract

The invention belongs to the technical field of acrylic sheet manufacturing, in particular to an acrylic sheet manufacturing process and a manufacturing device thereof, wherein the process steps are as follows: S1: filtering methyl methacrylate with a main material of not less than 90% through a 0.1um filter membrane to ensure that the material is clear and free of impurities; S2: throwing the filtered main material methyl methacrylate together with an appropriate amount of initiator into a stainless steel reactor for prepolymerization reaction at a high temperature of 90-100 DEG C for 45 minutes, and then cooling to room temperature and stirring to prepare a methyl methacrylate slurry with moderate viscosity; S3: throwing the prepolymerized methyl methacrylate slurry into a stainless steel stirring tank, and sequentially adding auxiliary materials such as 1-3% chain transfer agent, 1-3% cross-linking agent, 0.5-2% organic peroxide initiator, 0.5-3% light stabilizer, 0.5-3% antioxidant, 0.5-2% dioctyl phosphate, 1-5% methacrylic acid and 3-5% ethylene glycol dimethacrylate, stirring and mixing for 2 hours at a low speed, so as to solve the problem that the polymerization molding of acrylic sheets is unstable during a water bath process, resulting in poor quality.

Description

Technical Field

[0001] The invention belongs to the technical field of acrylic sheet manufacturing, in particular to an acrylic sheet manufacturing process and a manufacturing device thereof. Background Art

[0002] Acrylic, also known as specially treated plexiglass, is a replacement product for plexiglass. It is a commonly used polymer thermoplastic engineering material with good transparency, weather resistance, physical properties and processing properties. It has broad application prospects in construction, aerospace, automobile manufacturing, electronic equipment and other fields.

[0003] In the prior art, the acrylic sheet is formed by filling the raw material of the acrylic sheet into a glass plate frame mold and then polymerizing it in a water bath. However, the existing water bath device has the following problems: First, when the existing device heats and molds a single acrylic sheet, the glass plate frame mold is generally placed in a water bath by a hook and the water bath is suspended by the hook. However, due to the long heating time and the fact that the hook itself is connected by a chain, the stability is insufficient, and the glass plate frame mold is easily shaken, thereby affecting the molding quality of the acrylic sheet; Second, when the existing device heats multiple acrylic sheets at the same time, it is generally stacked from top to bottom to facilitate taking out and placing. However, the upper and lower glass plate frame molds are in a fitted state during the stacking. During the water bath heating process, the upper and lower parts of the glass plate frame mold are not heated evenly, which affects the polymerization effect and further leads to poor molding quality.

[0004] To this end, the present invention provides an acrylic plate manufacturing process and a manufacturing device thereof. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art and solve the problem of unstable polymerization molding of acrylic sheets in a water bath process, resulting in poor quality, the present invention proposes an acrylic sheet manufacturing process and a manufacturing device thereof.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a manufacturing process of an acrylic sheet according to the present invention, the process steps of which are as follows:

[0007] S1: Filter the main material ≥90% methyl methacrylate through a 0.1um filter membrane to ensure that the material is clear and free of impurities;

[0008] S2: The filtered main material methyl methacrylate and an appropriate amount of initiator are placed in a stainless steel reactor for prepolymerization at a high temperature of 90-100° C. for 45 minutes, and then cooled to room temperature and stirred to form a methyl methacrylate slurry with moderate viscosity;

[0009] S3: Put the prepolymerized methyl methacrylate slurry into a stainless steel stirring tank, and then add auxiliary materials such as chain transfer agent 1-3%, cross-linking agent 1-3%, organic peroxide initiator 0.5-2%, light stabilizer 0.5-3%, antioxidant 0.5-3%, dioctyl phosphate 0.5-2%, methacrylic acid 1-5% and ethylene glycol dimethacrylate 3-5% materials in sequence, stir at low speed for 2 hours, so that all materials are fully and evenly fused into emulsion;

[0010] S4: The above slurry is filtered through a 100-200 mesh sieve and degassed, then injected into a pre-prepared glass plate frame mold, the sealed mold is heated in a water bath (50-60°C, 4-5 hours) for polymerization, and then annealed in a drying room (120°C, 2-3 hours);

[0011] S5: After the annealing treatment, the mold and the product are cooled, demoulded, film-laminated, and cut into the final product.

[0012] A device for manufacturing acrylic sheets, which is suitable for the above-mentioned acrylic sheet manufacturing process, wherein the water bath device comprises a water bath box; a group of bottom plates are arranged in the water bath box; the bottom plates move up and down through a lifting member; two pairs of symmetrically distributed support frames are arranged on the bottom plates; a group of first grooves and a second groove are arranged on the side wall of the support frame, and the second grooves are located directly below a group of first grooves, and the two are of the same size; a third groove is arranged on the bottom of the second groove, and a lower pressure plate is fixedly connected to the bottom of the third groove through a spring, and the lower pressure plate is slidably connected in the second groove and extends out of the support frame; a fourth groove is arranged on the bottom of a group of first grooves, and a lower pressure block is fixedly connected to the bottom of the fourth groove through a spring, and the lower pressure block is slidably connected Connected in the first groove; inclined grooves are provided on the side walls on both sides of the first groove; a stop block is provided in the first groove, and sliding columns are fixedly connected on both sides of the stop block, and the sliding columns are slidably connected in the inclined groove; a guide groove is provided on the side wall of the stop block; a guide column is fixedly connected to the side wall of the lower pressure block, and the guide column is slidably connected in the guide groove; a group of the lower pressure blocks and the top of the lower pressure plate are fixedly connected to the first lower pressure column, and a group of the lower pressure blocks are fixedly connected to the bottom end of the second lower pressure column, a fifth groove is provided on the top of the first lower pressure column, and the cross-section of the fifth groove is convex, the cross-section of the second lower pressure column is inverted T-shaped, and the bottom end of the second lower pressure column passes through the side wall of the first groove and is slidably connected in the fifth groove of the adjacent first lower pressure column; the heights of the third groove and the fourth groove are the same.

[0013] Preferably, the lifting member includes a fixed column; fixed columns are fixedly connected to the middle parts of both sides of the base plate, and threaded grooves are provided in the fixed columns; a group of first cavities are provided in the water bath, and a servo motor is fixedly connected to the group of first cavities; a threaded rod is threadedly connected in the threaded groove, and the bottom end of the threaded rod is rotatably connected to the bottom end of the water bath, extends into the first cavity and is fixedly connected to a sprocket, and a pair of sprockets are driven by a chain; the bottom end of one of the threaded rods and the output end of the servo motor are connected to each other; fixed rods are fixedly connected to the side walls at the four corners of the base plate; guide rods are fixedly connected to the bottom end of the water bath relative to the fixed rod, and the guide rods are slidably connected to the inside of the fixed rod.

[0014] Preferably, a pair of symmetrically distributed cross slides are provided on the bottom plate, and the cross slides are set through from top to bottom; an extrusion plate is slidably connected in the cross slide, and the part of the extrusion plate located at the position of the cross slide is cross-shaped; a sixth groove is provided on both side walls of the water bath; a first track groove is provided on both side walls of the sixth groove; the first track groove is composed of a vertical groove and an oblique groove, and the vertical groove is located below the oblique groove; a moving block is fixedly connected to the side wall of the extrusion plate, and sliding columns are fixedly connected to both side walls of the moving block, and the sliding columns are slidably connected in the first track groove.

[0015] Preferably, a group of arc grooves are formed on the top of the lower pressure plate and the stop block; and rollers are rotatably connected in the arc grooves.

[0016] Preferably, a pair of symmetrically distributed first slide grooves are opened on the bottom plate; a first slider is fixedly connected to the bottom end of the support frame; the first slider is slidably connected in the first slide groove; a lead screw is rotatably connected in the first slide groove, and the first slider is connected to the lead screw through a lead screw nut pair.

[0017] Preferably, a concave groove is provided at the bottom end of the extrusion plate; a pair of first through grooves are provided on opposite surfaces of the extrusion plates, and the first through groove and the concave groove are connected to each other; a group of first rotating shafts are rotatably connected between the side walls on both sides of the first through groove, and a pressure plate is fixedly connected to the middle part of the first rotating shaft; the first rotating shaft is rotated by a power member.

[0018] Preferably, the power part includes a rack plate; the side wall of the rack plate is slidably connected to the side wall of the concave groove, and the top of the rack plate is fixed to the bottom of the concave groove through a spring; both ends of the first rotating shaft extend into the concave groove and are fixed with a first gear; the rack plate and the first gear are meshed with each other.

[0019] Preferably, a rotating column is connected to the inner thread of the rack plate, and the top end of the rotating column passes through the outside of the extrusion plate and is fixedly connected to a turning handle, and the bottom end of the rotating column is rotatably connected to an adjustment plate; a pair of symmetrically distributed positioning rods are fixedly connected to the adjustment plate; a pair of positioning grooves are opened at the bottom end of the rack plate; and the positioning rods are slidably connected in the positioning grooves.

[0020] Preferably, the top opposing surfaces of the two pairs of support frames are both provided with arc-shaped surfaces.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The acrylic sheet manufacturing process and the manufacturing device described in the present invention, through the arrangement of the support frame, the lower pressure plate and the stop block, allow the adjacent glass plate frame molds to be in a separated state, which will not affect the heat uniformity state. At the same time, the glass plate frame mold is supported and placed in a stable state, thereby ensuring the stable polymerization molding of the acrylic sheet and thus ensuring the molding quality.

[0023] 2. The acrylic sheet manufacturing process and manufacturing device described in the present invention drives the first rotating shaft to rotate through the power member, and the rotation of the first rotating shaft will drive the pressure plate to rotate, so that the end of the pressure plate is pressed into the upper surface of the glass plate frame mold to maintain its stability during the water bath process. At the same time, during the placement and removal of the glass plate frame mold, the pressure plate is contracted into the first through groove, which will not affect the placement and removal of the glass plate frame mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 is a stereogram of the present invention;

[0026] Figure 2 It is a partial structural diagram of the present invention;

[0027] Figure 3 It is a three-dimensional image of the base plate;

[0028] Figure 4 This is a cross-section of the base plate. Figure 1 ;

[0029] Figure 5 This is a cross-section of the base plate. Figure 2 ;

[0030] Figure 6 yes Figure 5 A partial enlarged view of the middle part;

[0031] Figure 7 is a partial side sectional view of the present invention;

[0032] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle;

[0033] Fig. 9 is a top cross-sectional view of an extruded plate;

[0034] Fig.10 It is an exploded view of the extruded plate;

[0035] Fig.11 This is an exploded view of the support frame;

[0036] In the figure: 1, water bath; 11, bottom plate; 12, support frame; 13, first groove; 14, second groove; 15, lower pressure plate; 16, third groove; 17, fourth groove; 2, lower pressure block; 21, stop block; 22, slide column; 23, inclined groove; 24, guide column; 25, guide groove; 26, first lower pressure column; 27, second lower pressure column; 28, fifth groove; 3, fixed column; 31, threaded groove; 32, threaded rod; 33, sprocket; 34, chain; 35, first cavity; 36, servo motor; 37, fixed rod ; 38. Guide rod; 4. Cross slide groove; 41. Extrusion plate; 42. Sixth groove; 43. First track groove; 44. Vertical groove; 45. Oblique slide groove; 46. Moving block; 47. Sliding column; 5. Arc groove; 51. Roller; 52. First slide groove; 53. First slider; 54. Lead screw; 6. Concave groove; 61. First through groove; 62. First rotating shaft; 63. Pressure plate; 64. Rack plate; 65. First gear; 66. Adjustment plate; 67. Rotating column; 68. Positioning rod; 69. Positioning groove; 7. Arc surface. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0038] like Figures 1 to 11 As shown, a process for manufacturing an acrylic sheet according to an embodiment of the present invention, the process steps are as follows:

[0039] S1: Filter the main material ≥90% methyl methacrylate through a 0.1um filter membrane to ensure that the material is clear and free of impurities;

[0040] S2: The filtered main material methyl methacrylate and an appropriate amount of initiator are placed in a stainless steel reactor for prepolymerization at a high temperature of 90-100° C. for 45 minutes, and then cooled to room temperature and stirred to form a methyl methacrylate slurry with moderate viscosity;

[0041] S3: Put the prepolymerized methyl methacrylate slurry into a stainless steel stirring tank, and then add auxiliary materials such as chain transfer agent 1-3%, cross-linking agent 1-3%, organic peroxide initiator 0.5-2%, light stabilizer 0.5-3%, antioxidant 0.5-3%, dioctyl phosphate 0.5-2%, methacrylic acid 1-5% and ethylene glycol dimethacrylate 3-5% materials in sequence, stir at low speed for 2 hours, so that all materials are fully and evenly fused into emulsion;

[0042] S4: The above slurry is filtered through a 100-200 mesh sieve and degassed, then injected into a pre-prepared glass plate frame mold, the sealed mold is heated in a water bath (50-60°C, 4-5 hours) for polymerization, and then annealed in a drying room (120°C, 2-3 hours);

[0043] S5: After the annealing treatment, the mold and the product are cooled, demoulded, film-laminated, and cut into the final product;

[0044] The tensile properties of traditional acrylic sheets are limited at room temperature, which restricts their application in certain fields. Generally speaking, the tensile strength of polymethyl methacrylate can reach 50-77MPa. The upper limit of these performance data has reached or even exceeded some engineering plastics. Its elongation at break is only 2%-3%, so its mechanical performance characteristics are basically hard and brittle plastics, and it is notch sensitive and easy to crack under stress, but the fracture is not as sharp and uneven as polystyrene and ordinary inorganic glass when it breaks. Therefore, according to the characteristics of polymethyl methacrylate, the present invention is modified by adding auxiliary materials and additives with appropriate components and proportions, which significantly enhances its tensile toughness and temperature resistance, and the tensile strength can reach more than 85MPa, which well expands its scope of application.

[0045] A device for manufacturing acrylic sheet materials, which is suitable for the above-mentioned acrylic sheet manufacturing process, wherein the water bath device comprises a water bath box 1; a group of bottom plates 11 are arranged in the water bath box 1; the bottom plates 11 move up and down through a lifting member; two pairs of symmetrically distributed support frames 12 are arranged on the bottom plates 11; a group of first grooves 13 and second grooves 14 are arranged on the side walls of the support frames 12, and the second grooves 14 are located directly below the group of first grooves 13, and the two are of the same size; a third groove 16 is arranged on the bottom of the second groove 14, and a lower pressing plate 15 is fixedly connected to the bottom of the third groove 16 through a spring, and the lower pressing plate 15 is slidably connected to the second grooves The groove 14 extends out of the support frame 12; a group of first grooves 13 are provided with a fourth groove 17 on the bottom of the groove, and the bottom of the fourth groove 17 is fixedly connected to the lower pressure block 2 through a spring, and the lower pressure block 2 is slidably connected in the first groove 13; the side walls of both sides of the first groove 13 are provided with an inclined groove 23; a stopper 21 is provided in the first groove 13, and both sides of the stopper 21 are fixedly connected to a slide column 22, and the slide column 22 is slidably connected in the inclined groove 23; a guide groove 25 is provided on the side wall of the stopper 21; a guide column 24 is fixedly connected to the side wall of the lower pressure block 2, and the guide column 24 is slidably connected in the guide groove 25; a group of the top of the lower pressure block 2 and the top of the lower pressure plate 15 A first pressing column 26 is fixedly connected to the end, and a second pressing column 27 is fixedly connected to the bottom end of a group of pressing blocks 2. A fifth groove 28 is opened at the top of the first pressing column 26, and the cross section of the fifth groove 28 is convex. The cross section of the second pressing column 27 is an inverted T-shaped. The bottom end of the second pressing column 27 passes through the side wall of the first groove 13 and is slidably connected in the fifth groove 28 of the adjacent first pressing column 26; the third groove 16 and the fourth groove 17 have the same height; in the prior art, the acrylic sheet is formed by filling the acrylic sheet raw material into the glass sheet frame mold and then polymerizing it by a water bath method, but the existing water bath device has the following problems: first, the existing When the device heats and forms a single acrylic plate, it generally uses a hook to put the glass plate frame mold into a water bath and hangs the water bath by the hook. However, due to the long heating time and the fact that the hook itself is connected by a chain, the stability is insufficient, which easily causes the glass plate frame mold to shake, thereby affecting the molding quality of the acrylic plate. Second, when the existing device heats multiple acrylic plates at the same time, it generally stacks them from top to bottom to facilitate taking out and placing. However, the upper and lower glass plate frame molds are in a fitted state during the stacking. During the water bath heating process, the upper and lower sides of the glass plate frame mold are not heated evenly, which affects the polymerization effect and further leads to poor molding quality.Therefore, when the present invention is working, the bottom plate 11 is first raised by the lifting member, and then the glass plate frame mold (the glass plate frame mold is a prior art and will not be explained) is placed between a group of support frames 12 from top to bottom using a suction cup or other stable tool (the suction cup or other tool is a prior art and will not be explained). In the initial state, at this time, only the lower pressing plate 15 in a group of support frames 12 extends out of the support frame 12. After the first glass plate frame mold is placed, the lower pressing plate 15 is subjected to its gravity and then moves downward. The downward movement of the lower pressing plate 15 will drive the first lower pressing column 26 on the lower pressing plate 15 to move downward. When the lower pressing plate 15 moves down to half the height of the third groove 16, the first lower pressing column 26 on the lower pressing plate 15 is moved downward. The top of the fifth groove 28 in the lower pressing column 26 just touches the bottom of the second lower pressing column 27 above, and then the lower pressing plate 15 continues to press down and fits the bottom of the third groove 16. At this time, the lower pressing plate 15 will drive the upper lower pressing block 2 to move down to half the height of the fourth groove 17 through the first lower pressing column 26 and the second lower pressing column 27. At this time, the lower pressing block 2 moves downward and drives the stop block 21 to press down through the setting of the guide column 24 and the guide groove 25. Because of the setting of the inclined groove 23 and the sliding column 22, the side wall of the stop block 21 extends out of the support frame 12 (at this time, the first glass plate frame mold is just completely placed on a set of lower pressing plates 15, and the stop block 21 located above the lower pressing plate 15 is 21 is just moved down to half the height of the fourth groove 17, and the part of the stopper 21 has already extended out of the support frame 12), and then when placing the second glass plate frame mold, the second glass plate frame mold is placed on a group of stoppers 21 that have already extended out of the support frame 12, and then repeat the above operation to allow the stopper 21 above the second glass plate frame mold to partially extend out of the support frame 12, and then the third, fourth and other glass plate frame molds are placed in sequence, which is quick to place, and the adjacent glass plate frame molds are in a separated state, which will not affect their uniform heat state, and at the same time, the glass plate frame mold is supported and placed in a stable state, ensuring the stable polymerization molding of the acrylic plate, and then To ensure the molding quality; at the same time, after the water bath is finished, the bottom plate 11 is moved up by the lifting member, and then removed from top to bottom by tools such as suction cups. When the second glass plate frame mold is removed from top to bottom, when the second glass plate frame mold is lifted, the stopper 21 located below it will also move up, and then when the stopper 21 rises to half the height of the fourth groove 17, the stopper 21 located above the second glass plate frame mold will completely enter the first groove 13, which will not affect the removal of the second glass plate frame mold. The removal is also convenient and quick, and once the removal is unstable, its fall will not affect the whole, and at most cause the adjacent glass plate frame mold. ;

[0046] The lifting member includes a fixed column 3; the middle of both sides of the bottom plate 11 are fixedly connected to the fixed column 3, and a thread groove 31 is provided in the fixed column 3; a group of first cavities 35 are provided in the water bath 1, and a servo motor 36 is fixedly connected in the group of first cavities 35; a threaded rod 32 is threadedly connected in the thread groove 31, and the bottom end of the threaded rod 32 is rotatably connected to the bottom end of the water bath 1 and extends into the first cavity 35 and is fixedly connected to a sprocket 33, and a pair of sprockets 33 are driven by a chain 34; the bottom end of one of the threaded rods 32 and the output of the servo motor 36 The outlet ends are connected to each other; the side walls at the four corners of the bottom plate 11 are fixedly connected with fixing rods 37; the bottom end of the water bath box 1 is fixedly connected with guide rods 38 at the position relative to the fixing rods 37, and the guide rods 38 are slidably connected inside the fixing rods 37; when working, the threaded rod 32 is driven by the servo motor 36 to rotate forward and reverse, thereby driving the bottom plate 11 to move up and down. At the same time, the setting of the fixing rods 37 and the guide rods 38 at the four corners of the bottom plate 11 can ensure that the bottom plate 11 will not deviate during the support process. At the same time, the above-mentioned lifting parts can also adopt existing technologies such as hydraulic cylinders.

[0047] A pair of symmetrically distributed cross slides 4 are provided on the bottom plate 11, and the cross slides 4 are in a through-set arrangement from top to bottom; an extrusion plate 41 is slidably connected in the cross slide 4, and the part of the extrusion plate 41 located at the position of the cross slide 4 is cross-shaped; a sixth groove 42 is provided on both side walls of the water bath 1; a first track groove 43 is provided on both side walls of the sixth groove 42; the first track groove 43 is composed of a vertical groove 44 and an oblique slide 45, and the vertical groove 44 is located below the oblique slide 45; a moving block 46 is fixedly connected to the side wall of the extrusion plate 41, and a sliding column 47 is fixedly connected to the side walls of the moving block 46, and the sliding column 47 is slidably connected in the first track groove 43; during operation, in order to ensure the accuracy of the position of the glass plate frame mold when it is placed, an extrusion plate 41 is provided, and when the bottom plate 11 moves from the lowest point to the highest point, a pair of extrusion plates 41 will move away from each other through the arrangement of the first track groove 43 and the sliding column 47, and at the bottom When the plate 11 moves from the highest point to the lowest point, the pair of extrusion plates 41 will move toward each other through the settings of the first track groove 43 and the sliding column 47. Therefore, after a group of glass plate frame molds are placed, the bottom plate 11 moves from the highest point to the lowest point, and the pair of extrusion plates 41 move toward each other, thereby performing extrusion and movement processing on both ends of a group of glass plate frame molds, and then using extrusion to ensure the overall stability effect. After the water bath is over, the bottom plate 11 moves from the lowest point to the highest point, and the pair of extrusion plates 41 move in opposite directions, thereby releasing the extrusion and fixation of the glass plate frame mold, thereby facilitating the subsequent removal of the glass plate frame mold; the moving trajectory of the sliding column 47 in the first track groove 43 is to first move in the vertical groove 44, and then enter the lowest end of the inclined slide groove 45, while driving the moving block 46 to move close to the bottom direction of the sixth groove 42, and then move downward from the highest point of the inclined slide groove 45, and then enter the vertical groove 44, which drives the moving block 46 to move away from the bottom direction of the sixth groove 42.

[0048] A group of arc grooves 5 are formed on the top of the lower pressing plate 15 and the stop block 21; a roller 51 is rotatably connected in the arc groove 5; when working, when the squeezing plate 41 is used to push the glass plate frame mold to adjust the position, the roller 51 is used to facilitate movement.

[0049] A pair of symmetrically distributed first slide grooves 52 are provided on the bottom plate 11; a first slider 53 is fixedly connected to the bottom end of the support frame 12; the first slider 53 is slidably connected in the first slide groove 52; a lead screw 54 is rotatably connected in the first slide groove 52, and the first slider 53 is connected to the lead screw 54 through a lead screw nut pair; during operation, the distance between the pair of support frames 12 can be adjusted by rotating the lead screw 54, so that glass plate frame molds of different widths can be applied, thereby increasing the scope of application.

[0050] A concave groove 6 is provided at the bottom end of the extrusion plate 41; a pair of first through grooves 61 are provided on the opposite surfaces of the extrusion plates 41, and the first through grooves 61 and the concave grooves 6 are connected to each other; a group of first rotating shafts 62 are rotatably connected between the side walls of the first through grooves 61, and a pressure plate 63 is fixedly connected to the middle of the first rotating shafts 62; the first rotating shafts 62 are rotated by a power member; during operation, in order to ensure that the glass plate frame mold is not affected by the flow of water in the water bath box 1, the first rotating shaft 62 will be driven to rotate by the power member during the downward movement of the extrusion plate 41, and the rotation of the first rotating shaft 62 will drive the pressure plate 63 to rotate, so that the end of the pressure plate 63 is pressed into the upper surface of the glass plate frame mold to maintain its stability during the water bath process. At the same time, during the placement and removal of the glass plate frame mold, the pressure plate 63 is retracted into the first through groove 61, which will not affect the placement and removal of the glass plate frame mold.

[0051] The power member includes a rack plate 64; the side wall of the rack plate 64 is slidably connected to the side wall of the concave groove 6, and the top of the rack plate 64 is fixed to the bottom of the concave groove 6 through a spring; both ends of the first rotating shaft 62 extend into the concave groove 6 and are fixed with a first gear 65; the rack plate 64 and the first gear 65 are meshed with each other; when working, when the bottom plate 11 drives the glass plate frame mold, the support frame 12 and the extrusion plate 41 to move downward, the sliding column 47 on the moving block 46 will enter the vertical groove 44, and then the glass plate frame mold The tool is in an accurate position state, and then when the bottom plate 11 continues to move downward, the bottom end of the rack plate 64 will first contact the bottom end of the water bath box 1, and then the rack plate 64 will move up, thereby driving the rotation of the first gear 65, allowing the first gear 65 to rotate toward the upper surface of the glass plate frame mold, and then driving the first rotating shaft 62 to rotate, so that the end of the pressure plate 63 and the upper surface of the glass plate frame mold fit each other, ensuring its water bath stability and not being affected by water flow and the external environment (the end part of the pressure plate 63 is made of high temperature resistant rubber material).

[0052] The rack plate 64 is internally threadedly connected with a rotating column 67, and the top end of the rotating column 67 passes through the outside of the extrusion plate 41 and is fixedly connected with a turning handle, and the bottom end of the rotating column 67 is rotatably connected with an adjusting plate 66; a pair of symmetrically distributed positioning rods 68 are fixedly connected to the adjusting plate 66; a pair of positioning grooves 69 are opened at the bottom end of the rack plate 64; the positioning rods 68 are slidably connected in the positioning grooves 69; when working, the adjusting plate 66 can be driven to move up and down by rotating the rotating column 67, thereby adjusting the position of the adjusting plate 66. The different positions of the adjusting plate 66 ensure different upward moving distances of the rack plate 64, thereby adjusting the rotation angle of the first rotating shaft 62, and then using the placement of glass plate frame molds of different thicknesses to further increase the application range of the device.

[0053] The top opposite surfaces of the two pairs of support frames 12 are both provided with arc surfaces 7; when working, the tops of the support frames 12 are all arc surfaces 7, which can avoid extreme collisions at the sharp corners of the support frames 12 during the placement of the glass plate frame mold, and also facilitate the placement of the glass plate frame mold using different tools.

[0054] Working principle: first, lift the bottom plate 11 by the lifting member, and then place the glass plate frame mold (the glass plate frame mold is a prior art and will not be explained) in turn from top to bottom between a group of support frames 12 using a suction cup or other stable tool (the suction cup or other tool is a prior art and will not be explained). In the initial state, at this time, only the lower pressing plate 15 in a group of support frames 12 extends out of the support frame 12. After the first glass plate frame mold is placed, the lower pressing plate 15 is subjected to its gravity and then moves downward. The downward movement of the lower pressing plate 15 will drive the first lower pressing column 26 on the lower pressing plate 15 to move downward. When the lower pressing plate 15 moves down to half the height of the third groove 16, the first lower pressing column 26 on the lower pressing plate 15 The top of the fifth groove 28 in 26 just touches the bottom of the second lower pressure column 27 located above, and then when the lower pressure plate 15 continues to press down and fits the bottom of the third groove 16, the lower pressure plate 15 will drive the upper lower pressure block 2 to move down to half the height of the fourth groove 17 through the first lower pressure column 26 and the second lower pressure column 27. At this time, the lower pressure block 2 moves downward and drives the stop block 21 to press down through the setting of the guide column 24 and the guide groove 25. Because of the setting of the inclined groove 23 and the sliding column 22, the side wall of the stop block 21 extends out of the support frame 12 (at this time, the first glass plate frame mold is just completely placed on a set of lower pressure plates 15, and the stop block 21 located above the lower pressure plate 15 is The fourth groove 17 is preferably moved down to half the height of the fourth groove 17, and the part of the stopper 21 has already extended out of the support frame 12), and then when placing the second glass plate frame mold, the second glass plate frame mold is placed on a group of stoppers 21 that have already extended out of the support frame 12, and then the above operation is repeated to allow the stopper 21 above the second glass plate frame mold to partially extend out of the support frame 12, and then the third, fourth and other glass plate frame molds are placed in sequence, which is quick to place, and the adjacent glass plate frame molds are in a separated state, which will not affect the uniform heat state, and at the same time, the glass plate frame mold is supported and placed in a stable state, ensuring the stable polymerization molding of the acrylic plate, thereby ensuring To ensure the molding quality; at the same time, after the water bath is finished, the bottom plate 11 is moved up by the lifting member, and then removed from top to bottom by tools such as suction cups. When the second glass plate frame mold is removed from top to bottom, when the second glass plate frame mold is lifted, the stopper 21 located below it will also move up, and then when the stopper 21 rises to half the height of the fourth groove 17, the stopper 21 located above the second glass plate frame mold will completely enter the first groove 13, which will not affect the removal of the second glass plate frame mold. The removal is also convenient and quick, and once the removal is unstable, its fall will not affect the whole, at most causing the adjacent glass plate frame mold;In order to ensure the accuracy of the position of the glass plate frame mold when it is placed, a squeezing plate 41 is provided. When the bottom plate 11 moves from the lowest point to the highest point, the pair of squeezing plates 41 will move away from each other through the first track groove 43 and the sliding column 47. When the bottom plate 11 moves from the highest point to the lowest point, the pair of squeezing plates 41 will move toward each other through the first track groove 43 and the sliding column 47. Therefore, after a group of glass plate frame molds are placed, the bottom plate 11 moves from the highest point to the lowest point, and the pair of squeezing plates 41 move toward each other, thereby squeezing and moving the two ends of a group of glass plate frame molds, and then using squeezing to ensure the overall stability effect. After the water bath is over, the bottom plate 11 moves from the lowest point to the highest point, and the pair of squeezing plates 41 move in opposite directions, thereby releasing the squeezing and fixing of the glass plate frame mold, thereby facilitating the subsequent removal of the glass plate frame mold. The moving track of the sliding column 47 in the first track groove 43 is first The bottom plate 11 moves the glass plate frame mold, the support frame 12 and the extrusion plate 41 downwards, and the sliding column 47 on the moving block 46 enters the vertical groove 44, and then the glass plate frame mold is in an accurate position. When the bottom plate 11 continues to move downwards, the bottom end of the rack plate 64 will first contact the bottom end of the water bath 1, and then the rack plate 64 will move up, thereby driving the first gear 65 to rotate, so that the first gear 65 rotates toward the upper surface of the glass plate frame mold, and then drives the first rotating shaft 62 to rotate, so that the end of the pressing plate 63 and the upper surface of the glass plate frame mold fit each other, ensuring its water bath stability and not being affected by water flow and external environment.

[0055] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A process for manufacturing acrylic sheet, characterized in that: The process steps are as follows: S1: Filter the main material ≥90% methyl methacrylate through a 0.1um filter membrane to ensure that the material is clear and free of impurities; S2: The filtered main material methyl methacrylate and an appropriate amount of initiator are placed in a stainless steel reactor for prepolymerization at a high temperature of 90-100° C. for 45 minutes, and then cooled to room temperature and stirred to form a methyl methacrylate slurry with moderate viscosity; S3: Put the prepolymerized methyl methacrylate slurry into a stainless steel stirring tank, and then add auxiliary materials such as chain transfer agent 1-3%, cross-linking agent 1-3%, organic peroxide initiator 0.5-2%, light stabilizer 0.5-3%, antioxidant 0.5-3%, dioctyl phosphate 0.5-2%, methacrylic acid 1-5% and ethylene glycol dimethacrylate 3-5% materials in sequence, stir at low speed for 2 hours, so that all materials are fully and evenly fused into emulsion; S4: The above slurry is filtered through a 100-200 mesh sieve and degassed, then injected into a pre-prepared glass plate frame mold, the sealed mold is heated to 50-60° C. in a water bath, polymerized for 4-5 hours, and then annealed in a drying room at 120° C. for 2-3 hours; S5: After the annealing treatment, the mold and the product are cooled, demoulded, film-laminated, and cut into the final product; The water bath device comprises a water bath box (1); a bottom plate (11) is arranged in the water bath box (1); the bottom plate (11) moves up and down by means of a lifting member; two pairs of symmetrically distributed support frames (12) are arranged on the bottom plate (11); a first groove (13) and a second groove (14) are arranged on the side wall of the support frame (12); the second groove (14) is located directly below the first groove (13) and the two grooves are of the same size; the second groove (14) is arranged on the bottom of the groove A third groove (16) is provided, and a lower pressing plate (15) is fixedly connected to the bottom of the third groove (16) through a spring, and the lower pressing plate (15) is slidably connected in the second groove (14) and extends out of the support frame (12); a group of first grooves (13) are provided with a fourth groove (17) on the bottom of the groove, and a lower pressing block (2) is fixedly connected to the bottom of the fourth groove (17) through a spring, and the lower pressing block (2) is slidably connected in the first groove (13); the first groove (13) is provided with a plurality of side walls on both sides. The inclined groove (23); a stopper (21) is provided in the first groove (13), and sliding columns (22) are fixedly connected on both sides of the stopper (21), and the sliding columns (22) are slidably connected in the inclined groove (23); a guide groove (25) is provided on the side wall of the stopper (21); a guide column (24) is fixedly connected on the side wall of the lower pressing block (2), and the guide column (24) is slidably connected in the guide groove (25); a first lower pressing plate (15) is fixedly connected on the top of the lower pressing block (2) and the top of the lower pressing plate (15); A pressure column (26), a group of lower pressure blocks (2) are fixedly connected to the bottom ends of the second lower pressure column (27), a fifth groove (28) is opened at the top end of the first lower pressure column (26), and the cross section of the fifth groove (28) is convex, the cross section of the second lower pressure column (27) is inverted T-shaped, the bottom end of the second lower pressure column (27) passes through the side wall of the first groove (13) and is slidably connected in the fifth groove (28) of the adjacent first lower pressure column (26); the heights of the third groove (16) and the fourth groove (17) are the same; The lifting member comprises a fixed column (3); the middle part of both sides of the bottom plate (11) is fixedly connected with a fixed column (3), and a thread groove (31) is provided in the fixed column (3); a group of first cavities (35) is provided in the water bath (1), and a servo motor (36) is fixedly connected in each of the first cavities (35); a threaded rod (32) is threadedly connected in the threaded groove (31), and the bottom end of the threaded rod (32) is rotatably connected to the bottom end of the water bath (1) and extends into the first A sprocket (33) is fixedly connected in the cavity (35), and a pair of sprockets (33) are driven by a chain (34); the bottom end of one of the threaded rods (32) and the output end of the servo motor (36) are connected to each other; fixed rods (37) are fixedly connected to the four corner side walls of the bottom plate (11); guide rods (38) are fixedly connected to the bottom end of the water bath (1) at a position relative to the fixed rod (37), and the guide rods (38) are slidably connected to the inside of the fixed rod (37).

2. The acrylic sheet manufacturing process according to claim 1, characterized in that: A pair of symmetrically distributed cross grooves (4) are provided on the bottom plate (11), and the cross grooves (4) are arranged to be connected vertically; an extrusion plate (41) is slidably connected in the cross groove (4), and the part of the extrusion plate (41) located at the position of the cross groove (4) is cross-shaped; a sixth groove (42) is provided on both side walls of the water bath (1); a first track groove (43) is provided on both side walls of the sixth groove (42); the first track groove (43) is composed of a vertical groove (44) and an oblique groove (45), and the vertical groove (44) is located below the oblique groove (45); a moving block (46) is fixedly connected to the side wall of the extrusion plate (41), and sliding columns (47) are fixedly connected to both side walls of the moving block (46), and the sliding columns (47) are slidably connected in the first track groove (43).

3. The acrylic sheet manufacturing process according to claim 2, characterized in that: A group of arc-shaped grooves (5) are formed on the top of the lower pressing plate (15) and the stop block (21); a roller (51) is rotatably connected in the arc-shaped groove (5).

4. The acrylic sheet manufacturing process according to claim 3, characterized in that: The base plate (11) is provided with a pair of symmetrically distributed first slide grooves (52); a first slider (53) is fixedly connected to the bottom end of the support frame (12); the first slider (53) is slidably connected in the first slide groove (52); a lead screw (54) is rotatably connected in the first slide groove (52), and the first slider (53) is connected to the lead screw (54) through a lead screw nut pair.

5. The acrylic sheet manufacturing process according to claim 4, characterized in that: A concave groove (6) is provided at the bottom end of the extrusion plate (41); a first through groove (61) is provided on the opposite surfaces of a pair of the extrusion plates (41), and the first through groove (61) and the concave groove (6) are communicated with each other; a group of first rotating shafts (62) are rotatably connected between the side walls of both sides of the first through groove (61), and a pressing plate (63) is fixedly connected to the middle of the first rotating shaft (62); the first rotating shaft (62) is rotated by a power member.

6. The acrylic sheet manufacturing process according to claim 5, characterized in that: The power member comprises a rack plate (64); the side wall of the rack plate (64) is slidably connected to the side wall of the concave groove (6), and the top end of the rack plate (64) is fixedly connected to the bottom of the concave groove (6) through a spring; both ends of the first rotating shaft (62) extend into the concave groove (6) and are fixedly connected to a first gear (65); the rack plate (64) and the first gear (65) are meshed with each other.

7. The acrylic sheet manufacturing process according to claim 6, characterized in that: The rack plate (64) is internally threadedly connected to a rotating column (67), and the top end of the rotating column (67) passes through the outside of the extrusion plate (41) and is fixedly connected to a turning handle, and the bottom end of the rotating column (67) is rotatably connected to an adjustment plate (66); a pair of symmetrically distributed positioning rods (68) are fixedly connected to the adjustment plate (66); a pair of positioning grooves (69) are opened at the bottom end of the rack plate (64); and the positioning rods (68) are slidably connected in the positioning grooves (69).

8. The acrylic sheet manufacturing process according to claim 7, characterized in that: The top opposite surfaces of the two pairs of support frames (12) are both provided with arc-shaped surfaces (7).

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