CN209903919U - Mounting structure for rotary die head of film blowing equipment - Google Patents
Mounting structure for rotary die head of film blowing equipment Download PDFInfo
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- CN209903919U CN209903919U CN201920490514.8U CN201920490514U CN209903919U CN 209903919 U CN209903919 U CN 209903919U CN 201920490514 U CN201920490514 U CN 201920490514U CN 209903919 U CN209903919 U CN 209903919U
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Abstract
A rotary die head mounting structure of film blowing equipment comprises a base, wherein a circular extrusion die head is mounted on the base and provided with a circular extrusion port, a vertical central flow channel is arranged on the central axis of the circular extrusion die head, a feed inlet is also formed outside the circular extrusion die head, the circular extrusion die head is divided into an upper part and a lower part, and an axial thrust bearing is arranged between the lower part of the circular extrusion die head and the upper part of the circular extrusion die head; a slewing bearing is further arranged between the base and the upper part of the circular extrusion die head, the slewing bearing consists of an outer ring, a ball and an inner ring, the inner ring is fixedly connected with the base, and the outer ring is fixedly connected with the upper part of the circular extrusion die head; and the peripheral side surface of the outer ring is provided with transmission teeth, the transmission teeth of the outer ring are meshed with a transmission gear, and the transmission gear is connected with a motor. The utility model discloses a circular extrusion die head upper portion components of a whole that can function independently and diameter can design great, and can delay the degree of wear of sealed copper ring.
Description
Technical Field
The utility model belongs to the technical field of plastic film production facility, especially, relate to a blown film equipment rotary die head mounting structure.
Background
The plastic film can be produced by adopting film blowing equipment, the film blowing equipment is provided with an extrusion die head, the extrusion die head is provided with a circular ring-shaped extrusion opening, a herringbone clamping plate is arranged above the extrusion die head, a traction clamping roller is arranged above the herringbone clamping plate, and a winding shaft is arranged at the lower stream of the traction clamping roller. The central axis of the extrusion die head is provided with a vertical central flow channel, the outside of the extrusion die head is also provided with a feed inlet, the feed inlet is connected to the lower end of the vertical central flow channel through a horizontal main flow channel, and a distribution flow channel is also arranged between the upper end of the vertical central flow channel and the circular ring-shaped extrusion opening.
During production, a high-temperature molten resin material enters the extrusion die head from the feeding hole, enters the vertical central flow channel through the horizontal main flow channel, is uniformly distributed to all points in the circumferential direction of the circular extrusion port through the distribution flow channel, is extruded through the extrusion die head to form a circular film bubble, is flattened through the herringbone plate to form a double-layer film, and is drawn away by the drawing clamping roller until being finally wound by the winding shaft.
However, due to reasons of mechanical design, mechanical structure, machining, etc., the thickness of each point of the cylindrical film bubble extruded from the circular extrusion port of the blow molding apparatus actually has a difference, for example, the thickness of the film bubble in the corresponding direction of the injection port is obviously thicker, and the thickness deviation belongs to a systematic error, that is, if the point in a certain direction of the film bubble is thicker, the subsequent film bubble is continuously thicker in the direction, so that the thickness of the film rolled in the above conventional manner is gradually accumulated and superposed at the same position of the roll material if not processed, and the thickness of the rolled film roll is seriously nonuniform, thereby causing a rib popping phenomenon and poor rolling quality.
In order to overcome the above disadvantages, the following two conventional solutions are available: the first solution is to use a mechanical rotary traction device: extruder and die head are fixed, the rolling axle is fixed, but make and pull the double-layered roller and chevron shape splint and rotate around aircraft nose central axis, pull the double-layered roller promptly and rotate for extrusion die head (membrane bubble), the distribution position of film thickness point axial on the coiled material just demonstrates the wave form distribution state like this, disperse along the axial of coiled material, thereby solved thick point (or call bump) systematic error and the rolling accumulation problem that brings well, the bump of messenger's film is at the axial of coiled material evenly distributed, can not be in same position accumulation, avoid exploding the muscle, reach the smooth purpose of rolling. The rotary traction device appears in various chinese patents, such as CN201410774285.4, CN201320366814.8, CN200920062191.9, etc. However, the mechanical rotary traction device has a complicated mechanical structure, and when the film passes through the rotary traction mechanism, the surface of the film slides and twists relative to the surfaces of the movable guide rollers, and the surface of the film generates sliding friction with the surfaces of the movable guide rollers, so that the film is easily accidentally pulled.
The second solution is that the extruder and the traction nip roller are fixed, and the extrusion die head is divided into an upper part and a lower part, wherein the upper part of the extrusion die head continuously rotates, which means that the circular ring-shaped extrusion opening continuously rotates, so that the distribution position of the film thickness points on the axial direction of the coiled material presents a wave-shaped distribution state. Because the extrusion die head needs to rotate ceaselessly, the vertical central flow passage needs to be divided into an upper section and a lower section, the lower section of the vertical central flow passage is fixed, the upper section of the vertical central flow passage, the circular extrusion port and the distribution flow passage rotate ceaselessly, and a sealing copper ring needs to be arranged between the upper section of the vertical central flow passage and the lower section of the vertical central flow passage. In the prior art, the upper part of the circular extrusion die head is supported above the lower part of the extrusion die head by an axial thrust bearing, so that the following defects exist: the weight of the upper part of the extrusion die head is completely pressed on an axial thrust bearing, and the bearing capacity of only one axial thrust bearing is limited, so that the design diameter and the volume of the extrusion die head are limited, the precision requirement on the axial thrust bearing is strict, and otherwise, the upper part of the extrusion die head is slightly inclined; and secondly, because the axial thrust bearing is close to the vertical central flow passage, the sealing copper ring between the upper section of the vertical central flow passage and the lower section of the vertical central flow passage is subjected to huge pressure, is seriously abraded and is difficult to continuously maintain good sealing performance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned shortcoming and provide a blown film equipment rotary die head mounting structure, its circular extrusion die head upper portion divides volume and diameter can design great, and can delay the degree of wear of sealed copper ring.
The purpose can be realized according to the following scheme: a rotary die head mounting structure of film blowing equipment comprises a base, wherein a circular extrusion die head is mounted on the base and provided with a circular extrusion port, a vertical central flow channel is arranged on the central axis of the circular extrusion die head, a feed inlet is also arranged outside the circular extrusion die head and connected to the lower end of the vertical central flow channel through a horizontal main flow channel, and a distribution flow channel is also arranged between the upper end of the vertical central flow channel and the circular extrusion port; the circular extrusion die head is divided into an upper part and a lower part, the vertical central flow passage is divided into an upper section and a lower section, the lower section of the vertical central flow passage, the horizontal main flow passage and the feed inlet are positioned at the lower part of the circular extrusion die head, the upper section of the vertical central flow passage, the distribution flow passage and the circular extrusion opening are positioned at the upper part of the circular extrusion die head, and a sealing copper ring is arranged between the upper section of the vertical central flow passage and the lower section of the vertical central flow passage; an axial thrust bearing is arranged between the lower part of the circular extrusion die head and the upper part of the circular extrusion die head; the extrusion die is characterized in that a slewing bearing is further arranged between the base and the upper part of the circular extrusion die head, the slewing bearing consists of an outer ring, rolling balls and an inner ring, arc-shaped grooves are formed in the peripheral surface of the inner side of the outer ring and the peripheral side surface of the inner ring, and the rolling balls are arranged in the two arc-shaped grooves; the inner ring is fixedly connected with the base, and the outer ring is fixedly connected with the upper part of the circular extrusion die head; and the peripheral side surface of the outer ring is provided with transmission teeth, the transmission teeth of the outer ring are meshed with a transmission gear, and the transmission gear is connected with a motor.
The utility model has the advantages of it is following and effect:
most weight of whole circular extrusion die top utilizes slewing bearing to bear on the base, and the weight of only fraction transmits circular extrusion die head part down through axial thrust bearing, consequently compares with traditional structure, the utility model discloses circular extrusion die head upper portion components of a whole that can bear is divided and the diameter is bigger, can delay the degree of wear of sealed copper ring, and circular extrusion die head top rotates more steadily, has reduced the requirement to axial thrust bearing precision by a wide margin.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
Fig. 2 is a schematic view of the lower half of the structure shown in fig. 1.
Fig. 3 is a front view of the structure of fig. 1 with the outer cover removed.
Fig. 4 is a schematic view of the internal structure of the film blowing apparatus shown in fig. 1.
Fig. 5 is an exploded view of the slewing bearing.
Detailed Description
The rotary die head mounting structure of the film blowing equipment shown in figures 1, 2, 3 and 4 comprises a base 1, a circular extrusion die head is mounted on the base 1 and is divided into an upper part and a lower part, namely an upper part 11 of a circular extrusion die head and a lower part 12 of the circular extrusion die head, the circular extrusion die head is provided with a circular ring-shaped extrusion opening 10, a vertical central flow passage is arranged on the central axis of the circular extrusion die head and is divided into an upper section and a lower section, namely an upper section 24 of the vertical central flow passage and a lower section 23 of the vertical central flow passage, a feed inlet 21 is arranged outside the circular extrusion die head, the feed inlet 21 is connected to the lower end of the lower section 23 of the vertical central flow passage (namely the lower end of the whole vertical central flow passage) through a horizontal main flow passage 22, a distribution flow channel 26 is also arranged between the upper end of the vertical central flow channel upper section 21 (namely the upper end of the whole vertical central flow channel) and the circular extrusion port 10; the lower vertical central runner section 23, the horizontal main runner 22 and the feed inlet 21 are positioned on the lower circular extrusion die head part 12, the upper vertical central runner section 24, the distribution runner 26 and the circular extrusion port 10 are positioned on the upper circular extrusion die head part 11, and a sealing copper ring 25 is arranged between the upper vertical central runner section 24 and the lower vertical central runner section 23; an axial thrust bearing 3 is provided between the circular extrusion die lower part 12 and the circular extrusion die upper part 11.
As shown in fig. 4 and 5, a rotary support is further arranged between the base 1 and the circular extrusion die head upper part 11, the rotary support is composed of an outer ring 41, balls 42 and an inner ring 43, the inner peripheral surface of the outer ring 41 and the outer peripheral surface of the inner ring 43 are provided with arc-shaped grooves 44, and the balls 42 are arranged in the two arc-shaped grooves 44; the inner ring 43 and the base 1 are fixedly connected together through a connecting pin rod 9, and the outer ring 41 and the upper part 11 of the circular extrusion die head are fixedly connected together through a vertical strut 8; the peripheral side surface of the outer ring 41 is provided with transmission teeth 5, the transmission teeth 5 of the outer ring are meshed with a transmission gear 51, and the transmission gear 51 is connected with a motor 6 through a transmission rod 61; an outer cover 7 is provided outside the outer ring 41.
The working process and principle of the above embodiment are as follows:
the circular extrusion port 10 of the upper part 11 of the circular extrusion die head continuously extrudes annular film bubbles, the annular film bubbles enter the traction clamping roller through the herringbone clamping plate, the motor 6 drives the outer ring 41 to continuously and slowly rotate back and forth through the transmission rod 61 and the transmission gear 51, the upper part 11 of the circular extrusion die head is driven to continuously and slowly rotate back and forth, the inner ring 43 and the lower part 12 of the circular extrusion die head are fixed, and then the annular film bubbles are continuously twisted relative to the traction clamping roller, so that the thick and thin points of the film are dispersed along the axial direction during winding, and the winding quality is improved.
Claims (1)
1. A rotary die head mounting structure of film blowing equipment comprises a base, wherein a circular extrusion die head is mounted on the base and provided with a circular extrusion port, a vertical central flow channel is arranged on the central axis of the circular extrusion die head, a feed inlet is also arranged outside the circular extrusion die head and connected to the lower end of the vertical central flow channel through a horizontal main flow channel, and a distribution flow channel is also arranged between the upper end of the vertical central flow channel and the circular extrusion port; the circular extrusion die head is divided into an upper part and a lower part, the vertical central flow passage is divided into an upper section and a lower section, the lower section of the vertical central flow passage, the horizontal main flow passage and the feed inlet are positioned at the lower part of the circular extrusion die head, the upper section of the vertical central flow passage, the distribution flow passage and the circular extrusion opening are positioned at the upper part of the circular extrusion die head, and a sealing copper ring is arranged between the upper section of the vertical central flow passage and the lower section of the vertical central flow passage; an axial thrust bearing is arranged between the lower part of the circular extrusion die head and the upper part of the circular extrusion die head; the extrusion die is characterized in that a slewing bearing is further arranged between the base and the upper part of the circular extrusion die head, the slewing bearing consists of an outer ring, rolling balls and an inner ring, arc-shaped grooves are formed in the peripheral surface of the inner side of the outer ring and the peripheral side surface of the inner ring, and the rolling balls are arranged in the two arc-shaped grooves; the inner ring is fixedly connected with the base, and the outer ring is fixedly connected with the upper part of the circular extrusion die head; and the peripheral side surface of the outer ring is provided with transmission teeth, the transmission teeth of the outer ring are meshed with a transmission gear, and the transmission gear is connected with a motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920490514.8U CN209903919U (en) | 2019-04-12 | 2019-04-12 | Mounting structure for rotary die head of film blowing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920490514.8U CN209903919U (en) | 2019-04-12 | 2019-04-12 | Mounting structure for rotary die head of film blowing equipment |
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| Publication Number | Publication Date |
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| CN209903919U true CN209903919U (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920490514.8U Active CN209903919U (en) | 2019-04-12 | 2019-04-12 | Mounting structure for rotary die head of film blowing equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115431495A (en) * | 2021-06-02 | 2022-12-06 | 广东义发实业股份有限公司 | Novel inflation film manufacturing machine is rotatory device |
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2019
- 2019-04-12 CN CN201920490514.8U patent/CN209903919U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115431495A (en) * | 2021-06-02 | 2022-12-06 | 广东义发实业股份有限公司 | Novel inflation film manufacturing machine is rotatory device |
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