Film blowing equipment based on cooling air ring with adjustable inner diameter

Abstract

The utility model relates to the technical field of plastic film blowing, in particular to film blowing equipment based on an inner-diameter-adjustable cooling air ring, which comprises a film blowing machine body, and an extrusion component used for extruding plastic into a film is arranged on one side of the top of the film blowing machine body. The extrusion assembly is provided with a discharging tank used for feeding plastic into the extrusion assembly, the discharging end of the extrusion assembly is further connected with a blow molding assembly, the top of the blow molding assembly is provided with a cooling assembly used for cooling the plastic subjected to blow molding forming, the cooling assembly comprises a shell, a cooling air ring assembly is arranged in the shell, and the cooling air ring assembly is connected with the discharging end of the extrusion assembly. The cooling air ring assembly comprises a plurality of adjusting pieces capable of adjusting angles, and every two adjacent adjusting pieces make contact with each other. According to the utility model, the plurality of independent adjusting pieces are arranged, and the positions of the adjusting pieces can be adjusted, so that the inner diameter of the air ring is adjusted to meet the production of different films.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic film blowing, specifically to a blowing film equipment based on cooling air ring of adjustable inner diameter. BACKGROUND

[0002] In the blowing film process, the cooling air ring is the key component to ensure the rapid setting of the extruded tube blank. The traditional cooling air ring usually adopts a fixed inner diameter structure, which is designed based on the diameter of a specific extruder die, and the high-temperature tube blank is forcedly cooled by annular airflow.

[0003] However, with the development of film production towards multi-specification, high efficiency and low energy consumption, the limitations of fixed inner diameter air ring are increasingly prominent. Different thickness, width or material of the film requires replacement of the air ring with corresponding inner diameter, resulting in long equipment downtime and low production flexibility. When the tube blank diameter does not match the air ring inner diameter, the airflow distribution is uneven, which easily causes problems such as film thickness deviation, crystallinity difference and surface wrinkles. SUMMARY

[0004] The utility model aims at providing a blowing film equipment based on cooling air ring of adjustable inner diameter, which is provided with several independent adjusting pieces, the position of the adjusting piece can be adjusted, and the inner diameter of the air ring is adjusted to meet the production of different films.

[0005] To solve the problems in the prior art, the utility model provides a blowing film equipment based on cooling air ring of adjustable inner diameter, which comprises a blowing film machine body, an extrusion assembly for extruding plastic into a film is arranged on one side of the top of the blowing film machine body, a feeding tank for feeding plastic into the extrusion assembly is arranged on the extrusion assembly, a blow molding assembly is further connected to the discharge end of the extrusion assembly, a cooling assembly for cooling the blow molded plastic is arranged on the top of the blow molding assembly, the cooling assembly comprises a shell, a cooling air ring assembly is arranged in the shell, the cooling air ring assembly comprises several adjusting pieces capable of adjusting the angle, and the adjacent two adjusting pieces are in contact with each other.

[0006] Preferably, several air holes for air outlet are further arranged on each adjusting piece.

[0007] Preferably, several air grooves for air outlet are further arranged on each adjusting piece.

[0008] Preferably, an electromagnetic valve capable of independently controlling the air inlet amount is arranged on each adjusting piece.

[0009] Preferably, the side of the adjusting piece close to the air hole coincides with the side of another adjusting piece away from the air hole, when the adjusting piece is contracted, a part of the air holes on one adjusting piece can be blocked by another adjusting piece.

[0010] Preferably, the adjusting piece is provided with one side of the air slot coinciding with the side of the adjacent adjusting piece away from the air slot, and when the adjusting piece is contracted, a part of the air slot on one adjusting piece can be blocked by the adjacent adjusting piece.

[0011] Preferably, the cooling air ring assembly further comprises a lower bottom plate arranged at the bottom of the adjusting piece, and the lower bottom plate is provided with a limiting slot corresponding to the adjusting piece; the bottom of the adjusting piece is further provided with a limiting column capable of sliding in the limiting slot.

[0012] Preferably, the limiting slot extends to the central position of the lower bottom plate.

[0013] Preferably, the cooling air ring assembly further comprises an upper tooth ring arranged at the top of the adjusting piece and used for moving the adjusting piece; the adjusting piece is further connected with a connecting shaft; the upper tooth ring is further provided with a sliding slot used for sliding the connecting shaft; the sliding slot extends to the central position of the upper tooth ring, and the sliding slot is an arc-shaped slot; the cooling assembly further comprises a driving mechanism used for driving the upper tooth ring to rotate, and the driving mechanism comprises a rotary driving piece, and the output end of the rotary driving piece is connected with a gear wheel engaged with the cooling air ring assembly.

[0014] Preferably, the film blowing machine body is further provided with a guide device near the position of the blowing assembly; the guide device is distributed with a plurality of guide rollers used for guiding the plastic film; the bottom of the guide device is further provided with an anti-deviation device; and the side of the guide device away from the blowing assembly is further provided with a winding device used for winding the plastic film.

[0015] The beneficial effects of the present application compared with the prior art are:

[0016] The present application is provided with a cooling air ring assembly, and the cooling air ring assembly comprises a plurality of adjusting pieces capable of moving; the adjusting piece is further provided with a connecting shaft, and the upper tooth ring is provided with a sliding slot matched with the connecting shaft; when the upper tooth ring rotates, the upper tooth ring can move the adjusting piece, so as to adjust the position of each adjusting piece, and then adjust the inner diameter of the air ring, so as to meet the bubble size of different plastic films. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a first three-dimensional structure schematic diagram of a film blowing equipment based on an inner diameter adjustable cooling air ring.

[0018] Figure 2 is a second three-dimensional structure schematic diagram of a film blowing equipment based on an inner diameter adjustable cooling air ring.

[0019] Figure 3 is an explosion structure schematic diagram of a film blowing equipment based on an inner diameter adjustable cooling air ring.

[0020] Figure 4 is a kind of cooling air ring assembly inside first three-dimensional structure schematic diagram based on the cooling air ring of adjustable inner diameter of the film blowing equipment embodiment one of the utility model.

[0021] Figure 5 is a kind of cooling air ring assembly inside second three-dimensional structure schematic diagram based on the cooling air ring of adjustable inner diameter of the film blowing equipment embodiment one of the utility model.

[0022] Figure 6 is a kind of cooling air ring assembly inside third three-dimensional structure schematic diagram based on the cooling air ring of adjustable inner diameter of the film blowing equipment embodiment one of the utility model.

[0023] Figure 7 is a kind of adjusting piece three-dimensional structure schematic diagram based on the cooling air ring of adjustable inner diameter of the film blowing equipment embodiment two of the utility model.

[0024] In the drawing, reference numerals are: 1, film blowing machine body;11, extrusion assembly;12, blanking tank;2, blow molding assembly;3, cooling assembly;31, cooling air ring assembly;311, upper tooth ring;3111, chute;312, adjusting piece;3121, electromagnetic valve;3122, air hole;3123, air groove;313, connecting shaft;314, lower bottom plate;3141, limit slot;315, limit column;32, rotary driving part;321, gear;33, shell;4, guiding device;41, guide roller;42, anti-offset device;5, winding device. DETAILED DESCRIPTION

[0025] In order to further understand the features, technical means and specific purposes and functions achieved by the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.

[0026] Referring to Figures 1-7The utility model provides a kind of blowing film equipment based on adjustable cooling air ring of inner diameter, including blowing film machine body 1, the one side of blowing film machine body 1 top is provided with the extrusion assembly 11 for extruding plastic into film, and the main function of extrusion assembly 11 is extruding plastic raw material into film shape.It is one of key components in blowing film process, and by specific mechanical structure and heating, extrusion etc.

[0027] Plastic raw material is stored in the hopper 12, and the hopper 12 stably feeds the plastic raw material into the extrusion assembly 11 according to the set amount. The extrusion assembly 11 heats and extrudes the fed plastic raw material, so that the plastic raw material becomes a continuous film embryo and is output from the discharge end of the extrusion assembly 11. The extruded film embryo enters the blow molding assembly 2, and the blow molding assembly 2 blows air into the film embryo to make it expand and adhere to the mold surface, forming a plastic film with a certain shape and size. The blow-molded plastic film is high in temperature, and the cooling assembly 3 plays a role at this time. The adjusting pieces 312 in the cooling air ring assembly 31 are adjusted to appropriate angles according to the shape and size of the film, so that the cooling air can uniformly blow to the surface of the plastic film. Through the action of the cooling air, the plastic film is rapidly cooled and solidified to ensure its dimensional stability and physical properties. Finally, the cooled and solidified plastic film is output from the blow molding assembly 2, completing the entire blowing film process.

[0028] In one embodiment, a plurality of air holes 3122 are provided on each adjusting piece 312 for air outlet. The side of the adjusting piece 312 close to the air holes 3122 coincides with the side of the other adjusting piece 312 away from the air holes 3122. When the adjusting piece 312 is contracted, a part of the air holes 3122 on one adjusting piece 312 can be blocked by the other adjusting piece 312.

[0029] When each adjusting member 312 is in the normal unfolded state, the air holes 3122 on each adjusting member 312 are in an open state, and cooling air can smoothly blow out of the air holes 3122, uniformly acting on the surface of the plastic film to achieve normal cooling function. When it is necessary to adjust the air outlet area or flow of cooling air, the contraction of the adjusting member 312 can be controlled to achieve this purpose. Since the side of the adjusting member 312 close to the air hole 3122 coincides with the side of the other adjusting member 312 away from the air hole 3122, when the adjusting member 312 is contracted, a part of the air holes 3122 on one adjusting member 312 will be blocked by the other adjusting member 312. In this way, the number of air holes 3122 actually blowing out is reduced, and the air outlet area and flow of cooling air are correspondingly reduced.

[0030] In the second embodiment, a plurality of air grooves 3123 for air outlet are further provided on each adjusting member 312. The side of the adjusting member 312 provided with the air grooves 3123 coincides with the side of the adjacent adjusting member 312 away from the air grooves 3123, and when the adjusting member 312 is contracted, a part of the air grooves 3123 on one adjusting member 312 can be blocked by the adjacent adjusting member 312. Cooling air blows out through the air grooves 3123 on the adjusting member 312. Due to the long strip structure of the air grooves 3123, cooling air can form a relatively continuous and uniform airflow, uniformly covering the surface of the blow-molded plastic film. This air outlet mode can more effectively cool the film compared to the air outlet mode of the air holes 3122 alone, reducing problems such as film deformation and uneven thickness caused by uneven cooling.

[0031] Each adjusting member 312 is provided with an electromagnetic valve 3121 capable of independently controlling the amount of air inlet.

[0032] The cooling air ring assembly 31 further comprises a lower bottom plate 314 provided at the bottom of the adjusting member 312, and the lower bottom plate 314 is provided with a limiting groove 3141 corresponding to the adjusting member 312. The bottom of the adjusting member 312 is further provided with a limiting column 315 which can slide in the limiting groove 3141. The limiting groove 3141 extends to the center position of the lower bottom plate 314. The limiting groove 3141 allows the adjusting member 312 to move along a specific path when the angle is adjusted, limiting the movement range of the adjusting member 312 and ensuring the accuracy and stability of the adjustment.

[0033] The cooling air ring assembly 31 further comprises an upper tooth ring 311 arranged on the top of the adjusting piece 312 and used for moving the adjusting piece 312, the adjusting piece 312 is further connected with a connecting shaft 313, and the upper tooth ring 311 is further provided with a sliding groove 3111 used for sliding of the connecting shaft 313, the sliding groove 3111 extends to the central position of the upper tooth ring 311, and the sliding groove 3111 is an arc-shaped groove, and the cooling assembly 3 further comprises a driving mechanism used for driving the upper tooth ring 311 to rotate.

[0034] The rotating driving piece 32 of the driving mechanism is started and begins to rotate. The rotating movement of the rotating driving piece 32 is transmitted to the upper tooth ring 311 through the gear 321, since the upper tooth ring 311 is engaged with the gear 321, the upper tooth ring 311 begins to rotate. When the upper tooth ring 311 rotates, the connecting shaft 313 slides along the arc-shaped path in the sliding groove 3111. The sliding of the connecting shaft 313 drives the movement of the adjusting piece 312, and the angle of the adjusting piece 312 changes in the movement process, so as to adapt to the change of the cooling demand caused by different plastic materials, film thicknesses and other factors.

[0035] The blowing machine body 1 is further provided with a guiding device 4 near the blowing assembly 2, the guiding device 4 is distributed with a plurality of guiding rollers 41 used for guiding the plastic film, and the bottom of the guiding device 4 is further provided with an anti-deviation device 42, and the side, away from the blowing assembly 2, of the guiding device 4 is further provided with a winding device 5 used for winding the plastic film.

[0036] The above embodiment only expresses one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A film blowing device based on an adjustable inner diameter cooling air ring, characterized in that: The utility model relates to a blowing film machine body (1) is provided with the extrusion assembly (11) for extruding plastic into film on one side of top of blowing film machine body (1), be provided with the feeding tank (12) for sending plastic into extrusion assembly (11) on extrusion assembly (11), the discharge end of extrusion assembly (11) is also connected with blowing assembly (2), the top of blowing assembly (2) is provided with cooling assembly (3) for cooling the plastic blow molding, cooling assembly (3) includes the casing (33), the casing (33) is provided with cooling air ring assembly (31), cooling air ring assembly (31) includes a plurality of angle adjustable adjusting piece (312), and adjacent two adjusting piece (312) contact each other.

2. The film blowing apparatus based on the cooling air ring with adjustable inner diameter according to claim 1, characterized in that: A plurality of air holes (3122) for air outlet are arranged on each adjusting piece (312).

3. The film blowing apparatus based on the cooling air ring with adjustable inner diameter according to claim 1, characterized in that: A plurality of air grooves (3123) for air outlet are arranged on each adjusting piece (312).

4. The film blowing apparatus based on the cooling air ring with adjustable inner diameter according to claim 1, characterized in that: An electromagnetic valve (3121) capable of independently controlling the air inlet amount is arranged on each adjusting piece (312).

5. The film blowing apparatus based on the cooling air ring with adjustable inner diameter according to claim 2, characterized in that: The side of the adjusting piece (312) provided with the air hole (3122) coincides with the side of the adjacent adjusting piece (312) away from the air hole (3122), when the adjusting piece (312) is contracted, part of the air holes (3122) on one adjusting piece (312) can be blocked by the adjacent adjusting piece (312).

6. The film blowing apparatus based on the cooling air ring with adjustable inner diameter according to claim 3, characterized in that: The side of the adjusting piece (312) provided with the air groove (3123) coincides with the side of the adjacent adjusting piece (312) away from the air groove (3123), when the adjusting piece (312) is contracted, part of the air grooves (3123) on one adjusting piece (312) can be blocked by the adjacent adjusting piece (312).

7. The film blowing apparatus based on the cooling air ring with adjustable inner diameter according to claim 1, characterized in that: The cooling air ring assembly (31) further comprises a lower bottom plate (314) arranged at the bottom of the adjusting piece (312), and a limiting groove (3141) corresponding to the adjusting piece (312) is formed in the lower bottom plate (314), and a limiting column (315) is arranged at the bottom of the adjusting piece (312) and can slide in the limiting groove (3141).

8. The film blowing apparatus based on the cooling air ring with adjustable inner diameter according to claim 7, characterized in that: The limiting groove (3141) extends to the central position of the lower bottom plate (314).

9. The film blowing apparatus based on the cooling air ring with adjustable inner diameter according to claim 1, characterized in that: The cooling air ring assembly (31) further comprises an upper tooth ring (311) arranged at the top of the adjusting piece (312) and used for moving the adjusting piece (312), a connecting shaft (313) is further connected to the adjusting piece (312), and a sliding groove (3111) for the connecting shaft (313) to slide is arranged on the upper tooth ring (311), the sliding groove (3111) extends to the central position of the upper tooth ring (311), and the sliding groove (3111) is an arc-shaped groove, and the cooling assembly (3) further comprises a driving mechanism for driving the upper tooth ring (311) to rotate, the driving mechanism comprises a rotary driving piece (32), a gear (321) is connected to the output end of the rotary driving piece (32), and the gear (321) is engaged with the cooling air ring assembly (31).

10. The film blowing apparatus based on the cooling air ring with adjustable inner diameter according to claim 1, characterized in that: The film blowing machine body (1) is provided with a guide device (4) near the film blowing assembly (2), a plurality of guide rollers (41) for guiding the plastic film are distributed on the guide device (4), and an anti-deviation device (42) is further arranged at the bottom of the guide device (4), and a winding device (5) for winding the plastic film is further arranged on the side of the guide device (4) away from the film blowing assembly (2).

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