Co-extrusion film blowing machine

Abstract

The utility model is applicable to the technical field of plastic film production equipment, and provides a co-extrusion film blowing machine which comprises supporting plates and an extrusion cylinder, the supporting plates which are symmetrically distributed are fixedly connected to a bottom plate, the extrusion cylinder is fixedly connected between the two supporting plates, a plurality of heaters which are uniformly distributed are fixedly connected to the outer wall of the extrusion cylinder, and the heaters are fixedly connected to the outer wall of the extrusion cylinder. A rotating cylinder is rotatably connected to the inner wall of the extrusion cylinder, a first spiral piece is arranged on the outer wall of the rotating cylinder, a first rotating shaft is rotatably connected to the inner wall of the rotating cylinder through a bearing, a thrust assembly is arranged at one end of the first rotating shaft and one end of the rotating cylinder in a matched mode, and a plurality of first bevel gears fixedly sleeve the outer wall of the first rotating shaft; a plurality of second rotating shafts are rotationally connected to the outer wall of the rotating cylinder, second spiral pieces are fixedly connected to the outer walls of the second rotating shafts, blocking pieces are fixedly connected to the edges of the second spiral pieces, and second bevel gears are fixedly connected to the lower ends of the second rotating shafts. The temperature gradient is effectively reduced, and the melting effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic film production equipment, in particular to a co-extrusion film blowing machine. Background Art

[0002] The co-extrusion film blowing machine is a high-end equipment that produces multi-layer composite plastic films through co-extrusion technology. Its function is to co-extrude multiple plastic raw materials and blow them into multi-layer composite films. Specifically, it completes extrusion molding through the following steps: (1) Raw material melting and conveying: Each layer of plastic raw material is fed into the corresponding extruder, heated and melted, and then pushed to the die head by the rotating screw; (2) Co-extrusion molding: The die head is designed with a multi-layer flow channel to ensure that the melt layers are superimposed in a preset order and extruded from the annular gap to form a tubular film blank; (3) Blowing and cooling: Compressed air is injected into the film blank from the center hole of the die head to blow it into a bubble tube shape, and at the same time it is cooled and shaped by the air ring; (4) Traction and winding: After the bubble tube is flattened by the herringbone plate, it is clamped and flattened by the traction roller and finally wound into a film roll.

[0003] The screw extruder is one of the core components of the co-extrusion film blowing machine. The traditional screw extruder mainly relies on multiple heaters installed on the outer wall to heat and melt the plastic particles inside. Since the heater is installed on the outer wall of the screw extruder, a temperature gradient is easily generated during the heat transfer to the inside, resulting in temperature differences at different positions inside the extruder. This uneven temperature distribution will affect the melting effect of the plastic raw materials, thereby reducing product quality.

[0004] Therefore, in view of the above situation, there is an urgent need to develop a co-extrusion film blowing machine to overcome the shortcomings in current practical applications. Utility Model Content

[0005] The purpose of the embodiment of the present utility model is to provide a co-extrusion film blowing machine, aiming to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A co-extrusion film blowing machine comprises a base plate and a die head, wherein the base plate is fixedly provided with a die head, a plurality of extrusion units are fixedly provided on the base plate, the discharge end of each extrusion unit is connected to the die head, and each extrusion unit extrude a different kind of molten plastic, the extrusion unit comprises a support plate and an extrusion barrel, a symmetrically distributed support plate is fixedly connected to the base plate, an extrusion barrel is fixedly connected between two of the support plates, an insulation shell is provided on the outer wall of the extrusion barrel, a feed port is provided on the extrusion barrel, a plurality of evenly distributed heaters are fixedly connected to the outer wall of the extrusion barrel, and a rotary rotary device is rotatably connected to the inner wall of the extrusion barrel. The first gear is connected to the. first gear of the transmission gear of the first transmission gear of the first invention or the like. The first gear is connected to the. first gear of the transmission gear of the first transmission gear of the first invention or the like. The first gear is connected to the. first gear of the transmission gear of the first transmission gear of the first invention or the like.

[0008] According to a further technical solution, the second rotating shafts are evenly distributed along the trajectory of the first spiral sheet.

[0009] A further technical solution is that the thrust assembly includes a placement rack, a third rotating shaft, a motor, a third bevel gear and a fifth bevel gear; the upper end of the base plate is fixedly connected to the placement rack, the placement rack is rotatably connected to the third rotating shaft, and two third bevel gears are sleeved on the third rotating shaft, the outer wall of the rotating drum and the end of the first rotating shaft close to the placement rack are fixedly connected to the fifth bevel gear, and the fifth bevel gear is meshed with the corresponding third bevel gear.

[0010] According to a further technical solution, the two third bevel gears are symmetrically arranged.

[0011] According to a further technical solution, one end of the first rotating shaft close to the placement rack extends out of the rotating drum, and the diameters of the two third bevel gears are different, and the diameters of the two fifth bevel gears are also different.

[0012] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art:

[0013] 1. The raw materials are heated by the heater, and the thrust assembly drives the drum and the feed port to rotate in opposite directions. Then the drum drives the second rotating shaft to rotate around the axis of the first rotating shaft. The first rotating shaft synchronously drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the second rotating shaft to rotate, and then the second rotating shaft drives the second spiral plate and the baffle to rotate, thereby transporting the raw materials in the inner layer to the outer layer, which can effectively reduce the temperature gradient, so that the raw materials are heated evenly, thereby improving the melting effect;

[0014] 2. The rotating drum drives the second rotating shaft to rotate around the axis of the first rotating shaft, which can stir the raw materials, help the raw materials to be heated evenly, and optimize the melting effect.

[0015] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure inside the extrusion cylinder of the utility model.

[0019] In the figure: 1. bottom plate; 2. die head; 3. support plate; 4. extrusion cylinder; 5. rotating cylinder; 6. feed port; 7. insulation shell; 8. heater; 9. first rotating shaft; 10. first bevel gear; 11. second bevel gear; 12. second rotating shaft; 13. second spiral plate; 14. baffle; 15. first spiral plate; 16. thrust assembly; 161. placement rack; 162. third rotating shaft; 163. motor; 164. third bevel gear; 165. fifth bevel gear. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0022] like Figure 1-Figure 3As shown, the embodiment of the present invention provides a co-extrusion film blowing machine, including a base plate 1 and a die head 2, the base plate 1 is fixedly provided with a die head 2, a plurality of extrusion units are fixedly provided on the base plate 1, the discharge end of each extrusion unit is connected to the die head 2, each extrusion unit extrude different kinds of molten plastics, the extrusion unit includes a support plate 3 and an extrusion barrel 4, the base plate 1 is fixedly connected with symmetrically distributed support plates 3, an extrusion barrel 4 is fixedly connected between two of the support plates 3, an outer wall of the extrusion barrel 4 is provided with a heat preservation shell 7, a feed port 6 is provided on the extrusion barrel 4, a plurality of evenly distributed heaters 8 are fixedly connected to the outer wall of the extrusion barrel 4, and the inner wall of the extrusion barrel 4 is rotatably connected to a rotating barrel 5. The outer wall of the rotating drum 5 is provided with a first spiral piece 15, and the inner wall of the rotating drum 5 is rotatably connected to the first rotating shaft 9 through a bearing. The first rotating shaft 9 and one end of the rotating drum 5 are cooperated with a thrust assembly 16, and the rotating drum 5 and the first rotating shaft 9 are driven to rotate in opposite directions by the thrust assembly 16. The outer wall of the first rotating shaft 9 is fixedly sleeved with a plurality of first bevel gears 10, and the outer wall of the rotating drum 5 is rotatably connected to a plurality of second rotating shafts 12, and the outer wall of the second rotating shaft 12 is fixedly connected to a second spiral piece 13, and the edge of the second spiral piece 13 is fixedly connected to a baffle 14, and the lower end of the second rotating shaft 12 is fixedly connected to a second bevel gear 11, and the second bevel gear 11 is meshed with the first bevel gear 10.

[0023] Furthermore, the second rotating shafts 12 are evenly distributed along the trajectory of the first spiral sheet 15 .

[0024] like Figure 1 and Figure 2 As shown, the thrust assembly 16 includes a placement rack 161, a third rotating shaft 162, a motor 163, a third bevel gear 164 and a fifth bevel gear 165; the upper end of the base plate 1 is fixedly connected to the placement rack 161, the placement rack 161 is rotatably connected to the third rotating shaft 162, and two third bevel gears 164 are sleeved on the third rotating shaft 162, the outer wall of the rotating drum 5 and the first rotating shaft 9 close to the placement rack 161 are fixedly connected to the fifth bevel gear 165, and the fifth bevel gear 165 is meshed with the corresponding third bevel gear 164.

[0025] Furthermore, the two third bevel gears 164 are symmetrically arranged, so as to drive the rotating drum 5 and the first rotating shaft 9 to rotate in opposite directions, thereby ensuring that the second bevel gear 11 and the die head 2 rotate.

[0026] Furthermore, one end of the first rotating shaft 9 close to the placement frame 161 extends out of the rotating drum 5, and the diameters of the two third bevel gears 164 are different, and the diameters of the two fifth bevel gears 165 are also different, thereby effectively preventing the third bevel gear 164 from interfering with or colliding with the rotating drum 5.

[0027] During specific application, the control motor 163 is started, and then the motor 163 drives the third rotating shaft 162 to rotate, and then the third rotating shaft 162 drives the two third bevel gears 164 to rotate, and the two third bevel gears 164 drive the fifth bevel gear 165 to rotate in opposite directions, and then the two fifth bevel gears 165 drive the rotating drum 5 and the feed port 6 to rotate in opposite directions; in addition, the rotating drum 5 drives the second rotating shaft 12 to rotate around the axis of the rotating drum 5, the first rotating shaft 9 drives the first bevel gear 10 to rotate, the first bevel gear 10 drives the second bevel gear 11 to rotate, the second bevel gear 11 drives the second rotating shaft 12 to rotate, and then the second rotating shaft 12 drives the second spiral plate 13 and the baffle 14 to rotate.

[0028] In an embodiment of the present utility model, the raw material is heated by the heater 8, and the thrust assembly 16 drives the rotating drum 5 and the feed port 6 to rotate in opposite directions, and then the rotating drum 5 drives the second rotating shaft 12 to rotate around the axis of the first rotating shaft 9, and the first rotating shaft 9 synchronously drives the first bevel gear 10 to rotate, the first bevel gear 10 drives the second bevel gear 11 to rotate, and the second bevel gear 11 drives the second rotating shaft 12 to rotate, and then the second rotating shaft 12 drives the second spiral piece 13 and the baffle 14 to rotate, thereby transporting the raw material of the inner layer to the outer layer, thereby effectively reducing the temperature gradient, so that the raw material is heated evenly, and thus improving the melting effect; the rotating drum 5 drives the second rotating shaft 12 to rotate around the axis of the first rotating shaft 9, which can stir the raw material, help the raw material to be heated evenly, and optimize the melting effect.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A co-extrusion film blowing machine, comprising a base plate (1) and a die head (2), wherein the die head (2) is fixedly arranged on the base plate (1), and a plurality of extrusion units are fixedly arranged on the base plate (1), wherein the discharge end of each extrusion unit is connected to the die head (2), and each extrusion unit extrude a different type of molten plastic, characterized in that: The extrusion unit comprises a support plate (3) and an extrusion barrel (4); the bottom plate (1) is fixedly connected to symmetrically distributed support plates (3); an extrusion barrel (4) is fixedly connected between the two support plates (3); an outer wall of the extrusion barrel (4) is provided with a heat-insulating shell (7); a feed port (6) is provided on the extrusion barrel (4); a plurality of evenly distributed heaters (8) are fixedly connected to the outer wall of the extrusion barrel (4); a rotating barrel (5) is rotatably connected to the inner wall of the extrusion barrel (4); a first spiral sheet (15) is provided on the outer wall of the rotating barrel (5); the inner wall of the rotating barrel (5) is rotatably connected to a first rotating shaft (9) via a bearing; the first rotating shaft (9) and One end of the rotating drum (5) is provided with a thrust assembly (16), and the rotating drum (5) and the first rotating shaft (9) are driven to rotate in opposite directions by the thrust assembly (16); a plurality of first bevel gears (10) are fixedly sleeved on the outer wall of the first rotating shaft (9); a plurality of second rotating shafts (12) are rotatably connected to the outer wall of the rotating drum (5); a second spiral sheet (13) is fixedly connected to the outer wall of the second rotating shaft (12); a baffle (14) is fixedly connected to the edge of the second spiral sheet (13); a second bevel gear (11) is fixedly connected to the lower end of the second rotating shaft (12), and the second bevel gear (11) is meshed with the first bevel gear (10).

2. The co-extrusion film blowing machine according to claim 1, characterized in that: The second rotating shafts (12) are evenly distributed along the trajectory of the first spiral sheet (15).

3. The co-extrusion film blowing machine according to claim 1, characterized in that: The thrust assembly (16) includes a placement rack (161), a third rotating shaft (162), a motor (163), a third bevel gear (164), and a fifth bevel gear (165); The upper end of the bottom plate (1) is fixedly connected to a placement rack (161), the placement rack (161) is rotatably connected to a third rotating shaft (162), and two third bevel gears (164) are sleeved on the third rotating shaft (162). The outer wall of one end of the rotating drum (5) and the first rotating shaft (9) close to the placement rack (161) is fixedly connected to a fifth bevel gear (165), and the fifth bevel gear (165) is meshedly connected with the corresponding third bevel gear (164).

4. The co-extrusion film blowing machine according to claim 3, characterized in that: The two third bevel gears (164) are symmetrically arranged.

5. The co-extrusion film blowing machine according to claim 4, characterized in that: One end of the first rotating shaft (9) close to the placement rack (161) extends out of the rotating drum (5), and the diameters of the two third bevel gears (164) are different, and the diameters of the two fifth bevel gears (165) are also different.

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