Plastic cup and production process thereof

Abstract

The invention relates to the field of plastic cup processing, in particular to a plastic cup and a production process thereof. A lifting platform is arranged on the base, a plurality of molds are arranged on the lifting platform, each mold is provided with a plurality of openings, a rotating ring is rotationally connected to the outside of each mold, mold plates corresponding to the openings in number are connected to each rotating ring in a sliding mode, an anti-sticking support is connected to each rotating ring in a sliding mode, and a rubber plate is arranged on each anti-sticking support. The invention relates to a plastic cup, which is composed of the following components in percentage by weight: 95% of polypropylene resin and 5% of additive. The invention discloses a plastic cup production process. The method comprises the following steps: S1, heating a plastic thin plate, and penetrating between a blow molding pipe and a lifting table from one side; s2, the hydraulic cylinder is driven to contract, and then dust-free air is blown out of the blow molding pipe; s3, the hydraulic cylinder is driven to extend, and then the hard plastic plate is taken out; and S4, cutting and separating the cup body formed on the hard plastic plate. The situation that the plastic cup is damaged when being separated from the mold can be reduced.

Description

Technical Field

[0001] The invention relates to the field of plastic cup processing, and more particularly to a plastic cup and a production process thereof. Background Art

[0002] In today's society, plastic cups have been widely used in people's daily lives, such as hard plastic cups for ordinary households and disposable plastic cups in street beverage shops. Existing plastic cups are generally blow-molded in batch processing. After blow molding, the plastic cups are generally pushed upward from the bottom to separate them from the mold. However, when the plastic cups cool down, they may adhere to the mold. In batch processing, the squeezing from the bottom will cause the plastic cups to deform. In this case, the plastic cups need to be screened after processing, which will affect the processing efficiency and the yield rate of the plastic cups. Summary of the invention

[0003] The invention provides a plastic cup and a production process thereof, aiming to reduce the possibility of damage of the plastic cup when it is separated from a mold.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A plastic cup processing device comprises a lifting platform, on which a plurality of moulds are arranged, each of which is provided with a plurality of openings, each of which is rotatably connected to a swivel, each of which is slidably connected to a mould plate corresponding to the number of openings, each of which is slidably connected to an anti-sticking bracket corresponding to the number of openings, each of which is slidably connected to two rubber plates, and each of which has a pull strip fixedly connected at both ends.

[0006] Each mold is slidably connected to a stripping module, and a first compression spring is fixedly connected between each stripping module and the corresponding mold.

[0007] A plastic cup processed by a plastic cup processing device is composed of the following components in parts by weight: 95% of polypropylene resin and 5% of the total weight of additives.

[0008] A production process used in a plastic cup processing device comprises the following steps:

[0009] S1: After heating the plastic sheet, insert it from one side between the blow molding tube and the lifting platform;

[0010] S2: drives the hydraulic cylinder to contract, and then blows out dust-free air from the blow tube;

[0011] S3: driving the hydraulic cylinder to extend, and then taking out the hard plastic plate;

[0012] S4: Cut and separate the cup body formed on the hard plastic plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a process flow chart of a plastic cup production process;

[0014] Figure 2 It is a schematic diagram of the overall structure of a plastic cup processing equipment;

[0015] Figure 3 It is a structural schematic diagram of the lifting platform part;

[0016] Figure 4 It is a structural schematic diagram of the base and track plate;

[0017] Figure 5 It is a schematic diagram of the structure of the mold and the swivel part;

[0018] Figure 6 It is a schematic diagram of the structure of the module removal part;

[0019] Figure 7 It is a structural schematic diagram of the slideway part;

[0020] Figure 8 It is a schematic diagram of the structure of the template and the anti-sticking bracket;

[0021] Fig. 9 It is a structural schematic diagram of the rubber sheet part;

[0022] Fig.10 It is a structural schematic diagram of the rotating shaft and the brace part;

[0023] Fig.11 It is a structural schematic diagram of the track plate part;

[0024] Fig.12 It is a structural schematic diagram of the connecting shaft part;

[0025] Fig.13 It is a structural diagram of the gear and rack parts.

[0026] In the figure: lifting platform 11; base 101; groove 102; mold 12; opening 201; slideway 202; swivel 203; drive block 204; stripping module 205; first compression spring 206; mold plate 13; anti-sticking bracket 301; rubber plate 302; pull rod 303; rotating shaft 304; coil spring 305; first bevel gear 306; track plate 14; track 401; slider 402; rack 403; connecting shaft 15; second bevel gear 501; gear 502; bracket 16; blow molding tube 601; hydraulic cylinder 602. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 cannot be understood as a limitation on the present invention.

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] like Figures 2 to 10 , to solve the problem of damage caused when the plastic cup is separated from the mold.

[0030] A plurality of molds 12 are welded on the lifting platform 11, and a plurality of openings 201 are processed on each mold 12. A swivel 203 is rotatably connected to the outside of each mold 12, and a mold plate 13 corresponding to the number of openings 201 is slidably connected to each swivel 203. The number of anti-sticking brackets 301 is equal to the number of openings, and each anti-sticking bracket 301 is slidably connected to the swivel 203. Two rubber plates 302 are arranged on each anti-sticking bracket 301, and a pull strip 303 is fixedly connected to both ends of each rubber plate 302.

[0031] During the processing, the lifting platform 11 rises to clamp the plastic sheet above the mold 12, and then the blow molding process is carried out. Initially, the mold plate 13 is located in the opening 201, and the mold plate 13 and the inner wall of the mold 12 are combined into a cup shape, so that the plastic sheet forms a plastic cup shape in the mold 12. After cooling, the driving ring 203 rotates, thereby driving the mold plate 13 to rotate synchronously and disengage from the opening 201. At the same time, the anti-sticking bracket 301 moves synchronously and moves into the opening 201, thereby driving the rubber plate 302 thereon to move to the opening 201. The curvature of the rubber plate 302 is the same as the curvature of the inner wall of the mold 12 at the beginning, thereby avoiding the plastic formed inside from being moved. The collision and friction of the cups cause the plastic cup to deform. When the anti-sticking bracket 301 is completely moved to the opening 201, the pull strips 303 on both sides of the rubber plate 302 are pulled, thereby driving the rubber plate 302 to gradually become horizontal. At this time, the center of the rubber plate 302 slightly squeezes the plastic cup inward, thereby pushing the plastic cup to separate from the mold 12, and then pushing upward from the bottom of the mold 12 to separate the plastic cup from the mold. Compared with traditional processing equipment, the present invention can slightly squeeze the plastic cup during the demolding process, thereby avoiding the plastic cup being squeezed and deformed when it is directly demolded due to the plastic cup being adhered to the mold 12, thereby affecting the processing yield.

[0032] like Figures 2 to 6 , to solve the problem of the plastic cup detaching from the mold 12.

[0033] The stripping module 205 is slidably connected in the corresponding mold 12 , and each first compression spring 206 is located between the stripping module 205 and the mold 12 .

[0034] A protrusion is provided at the lower end of the mold 12, which supports the stripping module 205, so that when the lifting platform 11 drives the mold 12 to move upward, the stripping module 205 can move synchronously with the mold 12, and the inner wall of the upper mold 12 of the stripping module 205 is used together to form the plastic cup. After the processing and cooling are completed, the lifting platform 11 is driven to move downward, thereby driving the mold 12 and the stripping module 205 to move downward synchronously. When the stripping module 205 contacts the base 101, the stripping module 205 is blocked. At this time, as the mold 12 moves, the stripping module 205 pushes the plastic cup inside to make it detach.

[0035] like Figures 5 to 7 , in order to avoid wear between the template 13 and the outer wall of the mold 12 during the movement.

[0036] The slideways 202 are respectively arranged between two adjacent openings 201 , and the guide wheels are rotatably connected to the mold plate 13 and the anti-sticking bracket 301 . Each guide wheel is rollingly connected in the corresponding slideway 202 , and the thickness of the slideway 202 is greater than the thickness of the mold 12 .

[0037] Initially, the mold plate 13 is located at the opening 201, and the anti-sticking bracket 301 is located at the slide 202. The thickness of the mold plate 13 and the thickness of the anti-sticking bracket 301 are less than the thickness of the slide 202. A first spring is arranged between the mold plate 13, the anti-sticking bracket 301 and the rotating ring 203. Then, when the plastic sheet is blown into a plastic cup, the mold plate 13 moves to the slide 202, and at the same time, the anti-sticking bracket 301 on the other side moves to the opening 201. At this time, the first spring can drive the anti-sticking bracket 301 to move into the opening 201. During the movement, the mold plate 13 is supported by the slide 202 to avoid friction between the inner surface and the mold 12, thereby avoiding deformation that causes deformation of the plastic cup formed during blow molding. At the same time, it can also avoid friction and wear between the rubber plate 302 and the mold 12 caused by the movement of the anti-sticking bracket 301.

[0038] like Figures 8 to 10 , in order to solve the problem that the pull rod 303 pulls the rubber sheet 302 .

[0039] Each anti-sticking bracket 301 is rotatably connected to a rotating shaft 304 , a coil spring 305 is fixedly connected between each rotating shaft 304 and the corresponding anti-sticking bracket 301 , and one end of each pull bar 303 is fixed to the corresponding rotating shaft 304 .

[0040] When the anti-sticking bracket 301 moves to the opening 201, the drive shaft 304 rotates, and then one end of the pull strip 303 is rolled on the shaft 304. At this time, the other end of the pull strip 303 pulls the rubber plate 302 to squeeze the plastic cup inward to help it separate from the mold 12. A coil spring 305 is fixed between the shaft 304 and the anti-sticking bracket 301. When the shaft 304 rotates, the coil spring 305 is compressed, squeezing the plastic cup. After it is separated from the mold 12, the rotation of the shaft 304 is stopped, and the coil spring 305 drives the shaft 304 to rotate in the opposite direction and reset, so that the rubber plate 302 resumes its arc state and maintains the same arc as the inner wall of the mold 12, thereby avoiding excessive squeezing of the plastic cup when the subsequent demolding module 205 pushes the plastic cup to demold.

[0041] like Figure 4 , Figure 5 and Fig.11 , in order to solve the problem of rotation of the rotating ring 203.

[0042] A base 101 is provided under the lifting platform 11, and a groove 102 corresponding to the stripping module 205 is provided on the base 101. A plurality of track plates 14 are fixedly connected around each groove 102, and the number of the track plates 14 corresponds to the number of the openings 201. A track 401 is provided on each track plate 14, and a driving block 204 is slidably connected in each track 401, and each driving block 204 is fixedly connected to the corresponding swivel 203.

[0043] After the blow molding of the plastic cup is completed, the device works in three stages. First, the rotating ring 203 rotates to move the mold plate 13 out of the opening 201, and the anti-sticking bracket 301 moves into the opening 201. Then the rotating shaft 304 separates the plastic cup from the mold 12. At this time, the stripping module 205 moves in the groove 102. Finally, when the stripping module 205 moves to the bottom of the groove 102, the stripping module 205 moves up relative to the mold 12 to eject the plastic cup from the mold 12. When the lifting platform 11 moves down, it drives the mold 12 to move down. At this time, the rotating ring 203 moves downward, and then drives the driving block 204 to slide in the track 401. The upper section of the track 401 is an inclined track, and then the driving block 204 rotates when it moves in it, so that the mold plate 13 is moved out of the opening 201 and the anti-sticking bracket 301 moves into the opening 201.

[0044] like Figures 11 to 13 , in order to solve the problem of rotation of the rotating shaft 304.

[0045] A first bevel gear 306 is fixedly connected to each rotating shaft 304 , one end of a connecting shaft 15 is rotatably connected to each opening 201 , a second bevel gear 501 is fixedly connected to each connecting shaft 15 , and each first bevel gear 306 is meshed with the second bevel gear 501 by movement.

[0046] When the anti-sticking bracket 301 moves toward the opening 201, it drives the rotating shaft 304 and the first bevel gear 306 to move synchronously. When the anti-sticking bracket 301 moves to the opening 201, the first bevel gear 306 and the second bevel gear 501 are meshed. At this time, the driving shaft 15 rotates, thereby driving the first bevel gear 306 to rotate, and then meshing and driving the second bevel gear 501 to drive the rotating shaft 304 to rotate.

[0047] like Figures 11 to 13 , in order to solve the problem of the rotation of the connecting shaft 15.

[0048] The other end of each connecting shaft 15 is rotatably connected to a slider 402, each slider 402 is slidably connected to the corresponding track plate 14, a second spring is fixed between each slider 402 and the track plate 14, a gear 502 is fixed to each connecting shaft 15, a rack 403 is fixed to each track plate 14, and each gear 502 is engaged with the rack 403 by moving.

[0049] When the mold 12 moves downward, it drives the connecting shaft 15 to move downward at the same time, and at this time drives the slider 402 to move in the track plate 14. At the beginning, the rotating ring 203 rotates, driving the anti-sticking bracket 301 to rotate, so that the first bevel gear 306 and the second bevel gear 501 are engaged. At this time, the connecting shaft 15 moves to the rack 403, and then the gear 502 is driven to rotate by the engagement of the rack 403, thereby driving the connecting shaft 15 to rotate and squeeze the plastic cup. As the connecting shaft 15 continues to move, when the gear 502 is no longer engaged with the rack 403, the coil spring 305 drives the rotating shaft 304 to drive the two-week 15 to reset. Then, as the mold 12 continues to move, the stripping module 205 pushes the plastic cup upward.

[0050] like Figure 2 , in order to solve the problem of moving the lifting platform 11 and blowing the plastic sheet into a plastic cup.

[0051] The lifting platform 11 is fixedly connected to the movable end of the hydraulic cylinder 602 , the fixed end of the hydraulic cylinder 602 is fixedly connected to the bracket 16 , the base 101 is fixedly connected to the lower end of the bracket 16 , and a plurality of blow molding tubes 601 are fixedly connected to the bracket 16 .

[0052] When the hydraulic cylinder 602 contracts, it drives the lifting platform 11 to move upward, thereby squeezing the plastic sheet between the lifting platform 11 and multiple blow molding tubes 601, and then blowing dust-free air out of the blow molding tubes 601 to form a plastic cup. Then the hydraulic cylinder 602 extends, driving the lifting platform 11 to move downward, and ejecting the plastic cup mold 12.

[0053] The plastic cup is composed of the following components by weight: polypropylene resin: 95%, total weight fraction of additives: 5%. The additives mainly include antioxidants, lubricants, light stabilizers and nucleating agents.

[0054] like Figure 1 , a production process used in a plastic cup processing device, comprising the following steps;

[0055] S1: After heating the plastic sheet, insert it from one side between the blow molding tube and the lifting platform 11 to facilitate subsequent blow molding processing;

[0056] S2: driving the hydraulic cylinder 602 to contract and fix the plastic sheet, and then blowing out dust-free air from the blow molding tube 601 to form a plastic cup by blow molding;

[0057] S3: driving the hydraulic cylinder 602 to extend, and then taking out the hard plastic plate;

[0058] S4: Cut and separate the cup body formed on the hard plastic plate.

Claims

1. A plastic cup processing equipment, characterized in that: The invention comprises a lifting platform (11), wherein a plurality of moulds (12) are arranged on the lifting platform (11), each mould (12) is provided with a plurality of openings (201), each mould (12) is rotatably connected to a rotating ring (203) outside, each rotating ring (203) is slidably connected to a mould plate (13) corresponding to the number of the openings (201), each rotating ring (203) is slidably connected to an anti-sticking bracket (301) corresponding to the number of the openings (201), each anti-sticking bracket (301) is provided with two rubber plates (302), and each rubber plate (302) is fixedly connected to a pull strip (303) at both ends.

2. The plastic cup processing equipment according to claim 1, characterized in that: Each of the molds (12) is slidably connected to a stripping module (205), and a first compression spring (206) is fixedly connected between each stripping module (205) and the corresponding mold (12).

3. The plastic cup processing equipment according to claim 1, characterized in that: A slideway (202) is provided between two adjacent openings (201) on each of the molds (12); a plurality of guide wheels are rotatably connected to each mold plate (13) and the anti-sticking bracket (301); each guide wheel rolls in a corresponding slideway (202); and the thickness of each slideway (202) is greater than the thickness of the mold (12).

4. The plastic cup processing equipment according to claim 1, characterized in that: Each of the anti-sticking brackets (301) is rotatably connected to a rotating shaft (304), a coil spring (305) is fixedly connected between each rotating shaft (304) and the corresponding anti-sticking bracket (301), and each pull bar (303) is fixedly connected to the corresponding rotating shaft (304).

5. The plastic cup processing equipment according to claim 1, characterized in that: A base (101) is provided below the lifting platform (11), and a groove (102) corresponding to the stripping module (205) is provided on the base (101). A plurality of track plates (14) are fixedly connected around each groove (102), and the number of the track plates (14) corresponds to the number of the openings (201). A track (401) is provided on each track plate (14), and a driving block (204) is slidably connected in each track (401), and each driving block (204) is fixedly connected to a corresponding rotating ring (203).

6. The plastic cup processing equipment according to claim 4, characterized in that: A first bevel gear (306) is fixedly connected to each rotating shaft (304), one end of a connecting shaft (15) is rotatably connected to each opening (201), a second bevel gear (501) is fixedly connected to each connecting shaft (15), and each first bevel gear (306) is meshed with the second bevel gear (501) by movement.

7. The plastic cup processing equipment according to claim 6, characterized in that: The other end of each connecting shaft (15) is rotatably connected to a slider (402), each slider (402) is slidably connected to the corresponding track plate (14), each connecting shaft (15) is fixedly connected to a gear (502), each track plate (14) is fixedly connected to a rack (403), and each gear (502) is meshed with the rack (403) by moving.

8. The plastic cup processing equipment according to claim 5, characterized in that: The lifting platform (11) is fixedly connected to the movable end of the hydraulic cylinder (602), the fixed end of the hydraulic cylinder (602) is fixedly connected to the bracket (16), the base (101) is fixedly connected to the lower end of the bracket (16), and a plurality of blow molding tubes (601) are fixedly connected to the bracket (16).

9. The plastic cup processed by the plastic cup processing equipment according to claim 8, characterized in that: The plastic cup is composed of the following components in parts by weight: polypropylene resin: 95%, and the total weight fraction of additives: 5%.

10. The production process used in the plastic cup processing equipment according to claim 8 is characterized in that: The process comprises the following steps; S1: After heating the plastic sheet, the sheet is inserted from one side between the blow molding tube and the lifting platform (11); S2: driving the hydraulic cylinder (602) to contract, and then blowing out dust-free air from the blow molding tube (601); S3: driving the hydraulic cylinder (602) to extend, and then taking out the hard plastic plate; S4: Cut and separate the cup body formed on the hard plastic plate.

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