Extrusion equipment for PET sheet production

Abstract

The present invention discloses an extrusion device for PET sheet production, including a base, a pressing mechanism and two extruders, wherein a die head is installed on the base; a containing box is slidably embedded in the notch, a telescopic mechanism is installed in the shell frame, and a transmission member is arranged in the notch; a glue storage chamber is installed on the base, two rotating wheels are rotatably connected in the shell frame, a one-way air pumping mechanism is arranged on the glue storage chamber, and a linkage member is arranged in the notch. In the present invention, firstly, by putting away the containing box containing glue, the glue is stored in a sealed environment to prevent the glue from contacting moisture and dust in the air, so that the glue can maintain stable performance; secondly, by the coordinated arrangement of the linkage member and the transmission member, the speed of the glue storage chamber pumping the glue in the containing box matches the speed of the glue consumption in the containing box, so as to meet the continuous processing and production of batches of PET sheets while ensuring the uniformity of glue coating.

Description

Technical Field

[0001] The invention relates to the technical field of PET sheet production equipment, in particular to extrusion equipment used for PET sheet production. Background Art

[0002] PET sheet, or polyethylene terephthalate sheet, is a common thermoplastic with good transparency, mechanical properties and chemical resistance. It is suitable for various fields such as food packaging, medical packaging, and daily necessities packaging.

[0003] The molding process of PET sheets involves melting PET particles at high temperature and then extruding them through an extruder to form PET sheets. In the prior art, according to patent application number: CN202110374647.0, a PET plastic sheet extruder and its working method are disclosed. The application provides a method of putting different raw materials into a first extrusion device and a second extrusion device respectively. When the raw materials are extruded, glue is applied to the lower end surface of the upper PET sheet, and then the two layers of PET sheets are pressed together by a pressing mechanism, which is conducive to achieving efficient compounding of the two layers of PET sheets.

[0004] However, in the prior art, the glue outlet groove is always exposed to the outside. After the extruder stops running, a certain amount of glue will still accumulate in the glue cavity. When the equipment is idle, the glue is exposed to the air for a long time. The solvent in the glue will volatilize due to exposure to the air, resulting in a decrease in the performance of the glue. The glue will be contaminated by dust and other impurities when exposed to the air, which will affect the quality of the glue and the bonding effect. In addition, since it is difficult to achieve automatic glue addition to the glue cavity in the prior art, as the glue-coated board consumes the glue, the contact area between the glue-coated board and the glue gradually decreases, which is prone to uneven glue coating on the PET sheet, thereby affecting the composite effect of the sheet.

[0005] Based on the above-mentioned drawbacks, an extrusion device for producing PET sheets is provided. Summary of the invention

[0006] The object of the present invention is to provide an extrusion device for producing PET sheets in order to solve the above problems.

[0007] In order to achieve the above object, the present invention adopts the following technical scheme: an extrusion device for producing PET sheets, comprising a base, a pressing mechanism installed on the base and two extruders, wherein a die head is installed on the base, wherein two cavities and a notch located between the two cavities are formed in the die head, and the output ends of the two die heads are fixed to the die heads and are respectively connected to the two cavities;

[0008] A containing box is slidably embedded in the notch, a shell frame is fixed on the containing box, a telescopic mechanism for controlling the sliding of the containing box is installed in the shell frame, a rotating shaft is rotatably connected in the containing box, and two rotating frames coaxially fixed with the rotating shaft are rotatably connected, a glue coating roller is rotatably connected between the two rotating frames, a transmission member is arranged in the notch, and when the containing box slides, the rotating shaft rotates under the action of the transmission member;

[0009] A glue storage chamber is installed on the base, the die head is connected to the glue storage chamber through a pipeline mechanism, two rotating wheels are rotatably connected in the shell frame, and a driving motor drives the two rotating wheels to rotate, a one-way air pumping mechanism is provided on the glue storage chamber, when the rotating wheel rotates, the glue storage chamber is pressurized by the one-way air pumping mechanism, a connecting piece is provided in the notch groove, when the rotating wheel rotates, the glue coating roller is controlled to rotate by the connecting piece.

[0010] Preferably, the transmission member includes a slider slidably connected to the side of the containing box, and a guide assembly driving the slider to move vertically relative to the containing box. The side of the containing box is formed with a slide groove for slidingly embedding the slider. The side end of the containing box is rotatably connected to a transmission arm coaxially fixed with the rotating shaft, and the free end of the transmission arm is rotatably connected to the slider.

[0011] Preferably, the guiding assembly comprises a protrusion fixed on the sliding block, and the inner wall of the recessed groove is formed with a slideway cooperating with the sliding of the protrusion, and the slideway is arranged obliquely along the sliding direction of the containing box.

[0012] Preferably, the pipeline mechanism comprises a conduit mounted on the die head and inserted into the glue storage chamber, and a bellows is fixedly connected between the containing box and the conduit.

[0013] Preferably, the one-way air pumping mechanism comprises an air bag installed on the glue storage chamber, a one-way air inlet valve is installed on the side of the air bag, a cross bar is fixed between the two rotating wheels, and an arm is rotatably connected to the top of the air bag.

[0014] Preferably, the linkage comprises a first sprocket and a second sprocket rotatably connected to the inner side of the rotating frame, and a component driving the second sprocket to rotate, the first sprocket is coaxially fixed with the glue coating roller, the second sprocket is coaxially distributed with the rotating shaft, and the outer engaging sleeves of the first sprocket and the second sprocket are provided with a chain.

[0015] Preferably, the component that drives the second sprocket to rotate includes a second bevel tooth rotatably connected to the containing box, and a coupling that drives the second bevel tooth to rotate. A rotating sleeve is fixedly connected between the two first sprockets, and the outer end of the rotating sleeve is fixedly provided with a first bevel tooth that engages with the second bevel tooth.

[0016] Preferably, the assembly driving the second bevel gear to rotate includes a sleeve rotatably connected to the die head, and the sleeve is coaxially fixed to one of the rotating wheels, and a shaft rod coaxially fixed to the second bevel gear is rotatably connected in the containing box, and the shaft rod is slidably connected to the sleeve via a spline.

[0017] Preferably, a shell sleeve matched with the first sprocket and the second sprocket is fixedly provided at the inner end of the rotating frame, and a shell cover matched with the first bevel gear and the second bevel gear is fixedly provided in the containing box.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. In the present application, after the processing of the PET sheet is completed, the containing box is controlled to extend into the notch through the telescopic mechanism. During this process, the rotating shaft will drive the glue coating roller to rotate into the containing box under the action of the transmission member. By folding up the containing box containing glue, the glue can be stored in a sealed environment to prevent the glue from contacting moisture and dust in the air, so that the glue can maintain stable performance.

[0020] 2. In the present application, the rotating wheel is controlled by the driving motor, so that the glue is continuously pumped into the containing box through the pipeline mechanism under the action of the one-way pumping mechanism, and the glue coating roller smears the glue on the bottom of the upper membrane under the action of the linkage. Through the coordinated arrangement of the linkage and the transmission part, the speed of the glue storage chamber pumping the glue to the containing box matches the speed of the glue consumption in the containing box, thereby meeting the continuous processing and production of batches of PET sheets while ensuring the uniformity of glue coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of an extrusion device provided according to an embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of the side structure of a die head provided according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic cross-sectional structure diagram of a die head provided according to an embodiment of the present invention is shown;

[0024] Figure 4 A schematic diagram of the internal structure of a die head provided according to an embodiment of the present invention is shown;

[0025] Figure 5 A schematic diagram of the internal structure of a containing box according to an embodiment of the present invention is shown;

[0026] Figure 6 A schematic cross-sectional structure diagram of a containing box provided according to an embodiment of the present invention is shown.

[0027] Legend:

[0028] 1. Base; 2. Extruder; 3. Die head; 4. Cavity; 5. Notch; 6. Container; 7. Rotary shaft; 8. Rotary frame; 9. Glue coating roller; 10. Shell; 11. First sprocket; 12. Second sprocket; 13. Chain; 14. Rotary sleeve; 15. First bevel gear; 16. Second bevel gear; 17. Shell; 18. Shaft; 19. Cross bar; 20. Shaft sleeve; 21. Telescopic mechanism; 22. Shell; 23. Rotary wheel; 24. Arm; 25. Drive motor; 26. Glue storage chamber; 27. Air bag; 28. One-way air inlet valve; 29. ​​Conduit; 30. Bellows; 31. Slide groove; 32. Slider; 33. Bump; 34. Transmission arm; 35. Slideway; 36. Pressing mechanism. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 6 The present invention provides a technical solution: an extrusion device for producing PET sheets, comprising a base 1, a pressing mechanism 36 installed on the base 1 and two extruders 2, a die head 3 is installed on the base 1, two cavities 4 and a notch 5 located between the two cavities 4 are formed in the die head 3, and the output ends of the two die heads 3 are fixed to the die head 3 and are respectively connected to the two cavities 4.

[0031] The raw material is put into the extruder 2, the extruder 2 heats the PET particles through the heating cylinder, and then the extruder 2 pushes the PET particles into the die 3 through the screw of the extruder 2, and is extruded and formed through the die 3 to form a PET sheet. The pressing mechanism 36 is a prior art device for pressing two layers of formed film sheets and achieving firm bonding.

[0032] The PET sol extruded by the extruder 2 is injection molded in the mold cavity 4 of the die head 3. The two mold cavities 4 are distributed up and down. After the membrane is formed by the mold cavity 4, the two layers of PET sheets can be directly stacked up and down. Since the two layers of sheets are not completely cooled, they can fit together well to achieve the composite of the two layers of PET sheets.

[0033] A containing box 6 is slidably embedded in the notch 5, a shell frame 22 is fixed on the containing box 6, a telescopic mechanism 21 for controlling the sliding of the containing box 6 is installed in the shell frame 22, a swivel 7 and two swivel frames 8 coaxially fixed with the swivel 7 are rotatably connected in the containing box 6, a glue coating roller 9 is rotatably connected between the two swivel frames 8, a transmission member is provided in the notch 5, and when the containing box 6 slides, the swivel 7 rotates under the action of the transmission member.

[0034] The telescopic mechanism 21 is an existing hydraulic or pneumatic telescopic rod. When the two layers of film are compounded, the telescopic mechanism 21 controls the containing box 6 to slide out of the notch 5. In this process, the rotating shaft 7 drives the glue coating roller 9 to rotate and lift through the rotating frame 8 under the action of the transmission member, so that the glue coating roller 9 contacts the lower end surface of the upper PET film, thereby realizing the glue coating process on it.

[0035] After the processing of the PET sheet is completed, the storage box 6 is controlled by the telescopic mechanism 21 to slide into the notch 5. During this process, the glue coating roller 9 will be rotated into the storage box 6 along with the rotating frame 8. By retracting the storage box 6 filled with glue, the glue can be stored in a sealed environment to prevent the glue from contacting moisture and dust in the air, so that the glue can maintain stable performance.

[0036] A glue storage chamber 26 is installed on the base 1, and the die head 3 is connected to the glue storage chamber 26 through a pipeline mechanism. Two rotating wheels 23 and a driving motor 25 that drives the two rotating wheels 23 to rotate are rotatably connected in the shell frame 22. A one-way air pumping mechanism is provided on the glue storage chamber 26. When the rotating wheel 23 rotates, the glue storage chamber 26 is pressurized by the one-way air pumping mechanism. A linkage is provided in the notch groove 5. When the rotating wheel 23 rotates, the glue coating roller 9 is controlled to rotate through the linkage.

[0037] The rotating wheel 23 is controlled to rotate by the driving motor 25, so that the glue stored in the glue storage chamber 26 is continuously pumped into the containing box 6 through the pipeline mechanism under the action of the one-way pumping mechanism. In this process, the glue coating roller 9 rotates under the action of the linkage member to apply the glue in the containing box 6 to the bottom of the upper membrane. Through the coordinated arrangement of the linkage member and the transmission member, the speed of the glue storage chamber 26 pumping the glue to the containing box 6 matches the speed of the glue consumption in the containing box 6, thereby meeting the continuous processing and production of batches of PET sheets while ensuring the uniformity of glue coating.

[0038] Specifically, Figure 3 and Figure 4 As shown, the transmission member includes a slider 32 slidably connected to the side of the containing box 6, and a guide assembly driving the slider 32 to move vertically relative to the containing box 6. The side of the containing box 6 is formed with a slide groove 31 for slidingly embedding the slider 32. The side end of the containing box 6 is rotatably connected to a transmission arm 34 coaxially fixed with the rotating shaft 7, and the free end of the transmission arm 34 is rotatably connected to the slider 32.

[0039] The transmission arm 34 is composed of two equal-length rods rotatably connected. When the slider 32 slides along the slide slot 31, the transmission arm 34 will rotate to unfold or fold, thereby driving the rotating shaft 7 coaxially fixed with the transmission arm 34 to rotate.

[0040] The guide assembly includes a protrusion 33 fixed on the slider 32 , and the inner wall of the notch 5 is formed with a slideway 35 for sliding with the protrusion 33 , and the slideway 35 is arranged obliquely along the sliding direction of the containing box 6 .

[0041] When the slider 32 moves with the containing box 6 , the protrusion 33 fixed on the slider 32 will slide along the slideway 35 , and the obliquely arranged slideway 35 will press the side wall of the protrusion 33 to drive the slider 32 to move along the slide groove 31 .

[0042] Specifically, Figure 3 and Figure 5 As shown, the pipeline mechanism includes a conduit 29 installed on the die head 3 and inserted into the glue storage chamber 26, and a bellows 30 is fixedly connected between the containing box 6 and the conduit 29; the one-way pumping air mechanism includes an air bag 27 installed on the glue storage chamber 26, a one-way air inlet valve 28 is installed on the side of the air bag 27, a cross bar 19 is fixed between the two rotating wheels 23, and an arm rod 24 is rotatably connected to the cross bar 19 and the top of the air bag 27.

[0043] The bellows 30 has good flexibility and plasticity, and can adapt to various complex pipeline layouts and bending requirements. The containing box 6 and the conduit 29 are connected through the bellows 30 to meet the movement of the containing box 6 in the notch groove 5.

[0044] When the rotating wheel 23 rotates, the arm 24 rotatably connected to the rotating wheel 23 through the cross bar 19 will reciprocately compress the airbag 27, so that air is injected into the glue storage chamber 26 through the one-way air inlet valve 28, and the glue storage chamber 26 is pressurized. Under the action of pressure, the glue in the glue storage chamber 26 is injected into the containing box 6 in turn through the conduit 29 and the bellows 30, so that the glue in the glue storage chamber 26 can be automatically filled into the containing box 6 during the glue consumption process of the glue coating roller 9.

[0045] Specifically, Figure 3 and Figure 6 As shown, the linkage includes a first sprocket 11 and a second sprocket 12 rotatably connected to the inner side of the rotating frame 8, and a component driving the second sprocket 12 to rotate. The first sprocket 11 is coaxially fixed with the glue coating roller 9, and the second sprocket 12 is coaxially distributed with the rotating shaft 7. The outer meshing sleeves of the first sprocket 11 and the second sprocket 12 are provided with a chain 13.

[0046] When the second sprocket 12 rotates, the first sprocket 11 will rotate synchronously with it under the action of the chain 13, thereby rotating the glue coating roller 9 coaxially fixed with the first sprocket 11, and applying the glue accumulated in the containing box 6 to the lower end surface of the upper PET sheet. The coaxial arrangement of the second sprocket 12 and the rotating shaft 7 enables the second sprocket 12 to drive the glue coating roller 9 which rotates and adjusts its position with the rotating frame 8.

[0047] The component driving the second sprocket 12 to rotate includes a second bevel tooth 16 rotatably connected to the containing box 6, and a coupling member driving the second bevel tooth 16 to rotate. A rotary sleeve 14 is fixedly connected between the two first sprockets 11, and a first bevel tooth 15 engaging with the second bevel tooth 16 is fixedly disposed at the outer end of the rotary sleeve 14.

[0048] When the second bevel gear 16 rotates, the first bevel gear 15 vertically meshing with the second bevel gear 16 will drive the rotary sleeve 14 to rotate, thereby driving the second sprocket 12 coaxially fixed with the rotary sleeve 14 to rotate.

[0049] The assembly driving the second bevel gear 16 to rotate includes a sleeve 20 rotatably connected to the die head 3, and the sleeve 20 is coaxially fixed to one of the rotating wheels 23. A shaft 18 coaxially fixed to the second bevel gear 16 is rotatably connected in the receiving box 6, and the shaft 18 is slidably connected to the sleeve 20 through a spline.

[0050] When the containing box 6 slides along the notch groove 5 under the action of the telescopic mechanism 21, the shaft rod 18 fixed on the second bevel gear 16 will slide along the shaft sleeve 20. Through the spline setting, the shaft sleeve 20 coaxially fixed with the rotating wheel 23 can drive the shaft rod 18 slidably connected thereto to rotate synchronously when the rotating wheel 23 rotates.

[0051] A shell 10 is fixedly disposed at the inner end of the rotating frame 8 and is matched with the first sprocket 11 and the second sprocket 12 . A shell 17 is fixedly disposed in the containing box 6 and is matched with the first bevel gear 15 and the second bevel gear 16 .

[0052] By providing the shell sleeve 10 and the shell cover 17 , the transmission parts and the linkage parts in the containing box 6 are shielded, thereby preventing the glue in the containing box 6 from affecting the transmission of the mechanical parts.

[0053] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An extrusion device for producing PET sheets, comprising a base (1), a pressing mechanism (36) mounted on the base (1) and two extruders (2), characterized in that: A die head (3) is mounted on the base (1), and two die cavities (4) and a notch (5) located between the two die cavities (4) are formed in the die head (3); the output ends of the two die heads (3) are fixed to the die head (3) and are respectively connected to the two die cavities (4); A containing box (6) is slidably embedded in the notch (5), a shell frame (22) is fixedly provided on the containing box (6), a telescopic mechanism (21) for controlling the sliding of the containing box (6) is installed in the shell frame (22), a rotating shaft (7) and two rotating frames (8) coaxially fixed to the rotating shaft (7) are rotatably connected in the containing box (6), a glue coating roller (9) is rotatably connected between the two rotating frames (8), a transmission member is provided in the notch (5), and when the containing box (6) slides, the rotating shaft (7) rotates under the action of the transmission member; A glue storage chamber (26) is installed on the base (1), the die head (3) is connected to the glue storage chamber (26) through a pipeline mechanism, two rotating wheels (23) are rotatably connected in the shell frame (22), and a driving motor (25) drives the two rotating wheels (23) to rotate, a one-way pumping mechanism is provided on the glue storage chamber (26), when the rotating wheel (23) rotates, the one-way pumping mechanism pressurizes the glue storage chamber (26), and a linkage is provided in the notch groove (5), when the rotating wheel (23) rotates, the linkage controls the glue coating roller (9) to rotate.

2. The extrusion equipment for producing PET sheets according to claim 1, characterized in that: The transmission member comprises a slider (32) slidably connected to the side of the containing box (6), and a guide assembly for driving the slider (32) to move vertically relative to the containing box (6); a slide groove (31) is formed on the side of the containing box (6) and is slidably embedded in the slider (32); a transmission arm (34) is rotatably connected to the side end of the containing box (6) and is coaxially fixed to the rotating shaft (7); and a free end of the transmission arm (34) is rotatably connected to the slider (32).

3. The extrusion equipment for producing PET sheets according to claim 2, characterized in that: The guide assembly comprises a protrusion (33) fixed on the slide block (32); the inner wall of the notch groove (5) is formed with a slideway (35) for matching the slide of the protrusion (33); the slideway (35) is arranged obliquely along the sliding direction of the containing box (6).

4. The extrusion equipment for producing PET sheets according to claim 1, characterized in that: The pipeline mechanism comprises a conduit (29) mounted on the die head (3) and inserted into the glue storage chamber (26), and a bellows (30) is fixedly connected between the containing box (6) and the conduit (29).

5. The extrusion equipment for producing PET sheets according to claim 1, characterized in that: The one-way air pump mechanism comprises an air bag (27) mounted on the glue storage chamber (26), a one-way air intake valve (28) is mounted on the side of the air bag (27), a cross bar (19) is fixedly arranged between the two rotating wheels (23), and an arm (24) is rotatably connected to the top of the cross bar (19) and the air bag (27).

6. The extrusion equipment for producing PET sheets according to claim 1, characterized in that: The linkage comprises a first sprocket (11) and a second sprocket (12) rotatably connected to the inner side of the rotating frame (8), and a component driving the second sprocket (12) to rotate, the first sprocket (11) being coaxially fixed to the glue coating roller (9), the second sprocket (12) being coaxially distributed to the rotating shaft (7), and a chain (13) being provided on the outer engaging sleeves of the first sprocket (11) and the second sprocket (12).

7. The extrusion equipment for producing PET sheets according to claim 6, characterized in that: The component driving the second sprocket (12) to rotate comprises a second bevel tooth (16) rotatably connected to the containing box (6), and a fitting driving the second bevel tooth (16) to rotate. A rotary sleeve (14) is fixedly connected between the two first sprockets (11), and the outer end of the rotary sleeve (14) is fixedly provided with a first bevel tooth (15) meshing with the second bevel tooth (16).

8. The extrusion equipment for producing PET sheets according to claim 7, characterized in that: The assembly driving the second bevel gear (16) to rotate comprises a shaft sleeve (20) rotatably connected to the die head (3), wherein the shaft sleeve (20) is coaxially fixed to one of the rotating wheels (23), and a shaft rod (18) coaxially fixed to the second bevel gear (16) is rotatably connected to the containing box (6), and the shaft rod (18) is slidably connected to the shaft sleeve (20) via a spline.

9. The extrusion equipment for producing PET sheets according to claim 8, characterized in that: A shell sleeve (10) is fixedly provided at the inner end of the rotating frame (8) and is arranged to cover the first sprocket (11) and the second sprocket (12). A shell cover (17) is fixedly provided in the containing box (6) and is arranged to cover the first bevel gear (15) and the second bevel gear (16).

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