CN108422650B - Cooling device of blown film equipment - Google Patents
Cooling device of blown film equipment Download PDFInfo
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- CN108422650B CN108422650B CN201810581593.3A CN201810581593A CN108422650B CN 108422650 B CN108422650 B CN 108422650B CN 201810581593 A CN201810581593 A CN 201810581593A CN 108422650 B CN108422650 B CN 108422650B
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- 238000001816 cooling Methods 0.000 title claims abstract description 23
- 238000010096 film blowing Methods 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
- B29C2035/1658—Cooling using gas
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
A cooling device of a film blowing device is provided, an upward air supply inlet is arranged in the center of an air supply base, annular air flow is supplied to an inner cavity of the air supply base through a flow dividing mechanism, an air supply pipe is uniformly arranged around the air supply base and is connected with the inner cavity of the air supply base and an annular main air duct, the annular main air duct is divided inwards to form a first-stage annular air duct with an outlet facing upward, a second-stage annular air duct, a first-stage annular air duct outlet and a second-stage annular air duct outlet are converged, the inlet of the first-stage annular air duct is arranged on an air outlet adjusting ring in an inlet hole array circumference mode and communicated with the second-stage annular air duct, the air outlet adjusting ring only adjusts the space size of the second-stage annular air duct and adjusts the flow rate of the first-stage annular air. The device can improve the cooling stability of the film blank, particularly the viscous-state film blank which is extruded initially, and simultaneously improve the forming effect of the film blank close to the frost line part.
Description
Technical Field
The invention relates to the technical field of film blowing equipment, in particular to a cooling device of the film blowing equipment.
Background
In the production process of the plastic packaging film, a film blowing machine is usually adopted for processing and production, a molten resin material is extruded from an extrusion opening of a die head and is pulled upwards, cold air is uniformly blown out through an air ring in the process to cool an extruded hot film blank so as to form a high-elastic state cylindrical film bubble with relatively stable shape, and in the cooling process of the film blank, especially a section of viscous-state film blank with relatively soft texture near the extrusion opening, the pressure, the flow rate and the uniformity of reasonable air flow need to be controlled, so that the shape influence of irregular air flow output by the air ring on the extrusion area of the film blank is avoided; in addition, after the film blank is cooled by the blown air flow, the conventional single-air-duct air ring is difficult to cool the film blank close to the viscous state section below the frost line through the air flow, the air flow blowing height needs to be improved by increasing the air flow pressure and the air flow speed, and the large-flow high-speed air flow easily causes that the initially extruded viscous state film blank near the extrusion opening is pressed too much, so that the bad influence of unstable film bubble form or tearing of the film bubble is caused.
Disclosure of Invention
The invention aims to provide a cooling device of film blowing equipment, which carries out airflow preflow on a fan through an air supply base, supplies air to each air supply pipe, provides relatively constant multi-directional airflow to an annular main air duct, and provides uniform airflow through airflow velocity of a first-stage annular air duct and a second-stage annular air duct of an air outlet adjusting ring, so that the cooling stability of film blanks, particularly viscous-state film blanks with low initial extrusion stability is improved, and the forming effect of the film blanks close to a frost line part is improved.
In order to achieve the purpose, the invention is implemented by adopting the following technical means:
a cooling device of a film blowing device comprises an air supply base, an air ring and an air supply pipe, wherein the center of the air supply base is provided with an upward air supply inlet, annular airflow is supplied to an inner cavity of the air supply base through a flow dividing mechanism, the air supply pipe is uniformly arranged around the air supply base and is connected with the inner cavity of the air supply base and an annular main air duct, the annular main air duct is divided inwards to form a primary annular air duct and a secondary annular air duct, outlets of the primary annular air duct and the secondary annular air duct are converged, the inlet of the primary annular air duct is arranged on an air outlet adjusting ring in an inlet hole array circumference manner, and the air outlet adjusting ring is communicated with the secondary annular air channel, only adjusts the space size of the secondary annular air channel and adjusts the flow rate of the primary annular air channel and the secondary annular air channel simultaneously, the air outlet adjusting ring is provided with a closed structure for closing the secondary annular air channel, and the annular main air channel directly supplies air to the primary annular air channel in a closed state.
Furthermore, the shunting mechanism include with air feed entry axial lead collinear toper platform, annular flow distribution plate, ring baffle, the most advanced downward directional air feed entry center of the toper platform of air feed base inner chamber roof, evenly set up the reposition of redundant personnel hole on the annular flow distribution plate of air feed base inner chamber diapire, annular flow distribution plate partially encloses the toper platform, the ring baffle part of air feed base inner chamber roof encloses the ring flow distribution plate, the air feed pipe entry lies in air feed base lateral wall and goes up reason and point to ring baffle.
Furthermore, the annular main air duct is formed by enclosing an air ring surface cover and an air ring bottom cover, and a plurality of main air duct inlets matched with the air supply pipes are uniformly arranged at the lower end of the air ring bottom cover.
Furthermore, the second-stage annular air duct is axially adjusted through the air outlet adjusting ring, the size of a gap space of the second-stage annular air duct enclosed between the lower surface of the air outlet adjusting ring and the upper surface of the air ring bottom cover is controlled, the closed structure is that the annular arc edge and the air ring bottom cover which narrow the second-stage annular air duct are formed by protruding the bottom wall of the air outlet adjusting ring to the upward folding area of the air outlet nozzle downwards, and when the air outlet adjusting ring is axially adjusted to the lowest point, the annular arc edge and the air ring bottom cover are attached to each other to close the second.
Furthermore, the inlet and the outlet of the primary annular air duct are lower than the outlet of the secondary annular air duct.
And furthermore, the innermost ring of the die head sleeve opening of the air ring is bent upwards to form an inner ring wall, the innermost ring of the air ring bottom cover is bent upwards to form a central ring wall, a primary annular air duct outlet is formed by enclosing the central ring wall and the inner ring wall, and the height of the inner ring wall is lower than that of the central ring wall.
Furthermore, the innermost ring of the air-out adjusting ring is bent upwards to form an outer ring wall, the outer ring wall and the central ring wall are enclosed to form a secondary annular air duct outlet, and the height of the central ring wall is lower than that of the outer ring wall.
As an effective arrangement scheme, a shunting air ring for separating the annular main air channel is arranged in the annular main air channel, and shunting air holes for communicating the annular main air channels on two sides of the shunting air ring are uniformly formed in the shunting air ring.
Furthermore, the annular main air duct forms a three-stage gradually roundabout downward annular stepped air duct from outside to inside, and the diversion air ring is arranged in the second-stage annular stepped air duct.
As an effective arrangement scheme, the air outlet adjusting ring performs axial adjustment on the secondary annular air duct through mutual screwing displacement of the threads on the outer wall and the threads on the inner wall of the air annular cover.
The invention has the following advantages:
1. the cooling device supplies air to the fan through the flow dividing mechanism to divide the air supply of the fan, annular air flow is formed in the air supply base in advance, and when air is supplied to the annular main air duct of the air ring along the air supply pipes uniformly surrounding the air supply base, the air flow enters the annular main air duct from the inlets of the annular air ducts to be more uniform;
2. the air ring divides the annular main air channel into a mild primary annular air channel and an adjustable secondary annular air channel to carry out air flow cooling on the film blank, when the gap between the primary annular air channel and the secondary annular air channel is adjusted by the air-out adjusting ring, the annular arc edge has the contraction effect on the air flow, so that the air flow passes through the primary annular air duct in a small-flow and high-speed mode, after the viscous-state film blank with lower initial extrusion stability is rapidly cooled, the secondary annular air duct is subjected to flow reduction and speed increase, under the condition of not changing the total airflow flow, the speed increasing function of the primary and secondary annular air ducts can be realized by the axial adjustment of the air outlet adjusting ring, under extreme conditions, the annular arc edge can tightly press and close the secondary air duct, and the air flow is reasonably controlled, so that the primary air duct can cool the film blank of specific plastic by high-speed air flow at reasonable flow;
3. preferably, the primary air duct outlet, the secondary air duct outlet and the mixed air duct outlet are integrally distributed in a stepped manner at the airflow speed in a reasonable adjusting interval through the mixed air duct formed by the primary annular air duct outlet and the secondary annular air duct outlet, so that the uniformity of cooling the viscous-state film blank by the airflow is further improved; in addition, the innermost ring of the air outlet adjusting ring is bent upwards to form an outer ring wall, and airflow flows through the outer ring wall to be collected, so that the airflow has a stronger cooling effect on film blanks close to frost lines under the condition of the same airflow flow rate;
4. the three-stage annular stepped air channel which roundly goes downwards step by step is arranged, when the air flow pumped by an external fan is not uniform enough, the air flow can be homogenized through the three-stage annular stepped air channel which roundly goes downwards step by step, and after the air flow is decelerated through the first-stage annular stepped air channel and then homogenized through the shunting air rings in the second-stage annular stepped air channel, the uniform effect on the air flow can be optimal.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic view, partially in section, of a wind ring according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention easier to understand, the present invention will be described in further detail with reference to the following examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
As shown in fig. 1-3, a cooling device of a film blowing apparatus comprises an air supply base 90, an air ring, six air supply pipes 10, wherein an upward air supply inlet 91 is arranged at the center of the air supply base 90, annular air flow is supplied to an inner cavity of the air supply base through a flow dividing mechanism, and the air supply pipes 10 are uniformly arranged around the air supply base 90 and are connected with the inner cavity of the air supply base and an annular main air duct 3;
as shown in fig. 2, the flow dividing mechanism includes a conical table 93, an annular flow dividing plate 92 and an annular baffle 94 which are collinear with the axial line of the air supply inlet 91, the tip of the conical table 93 on the top wall of the inner cavity of the air supply base 90 points downwards to the center of the air supply inlet 91, flow dividing holes are uniformly arranged on the annular flow dividing plate 92 on the bottom wall of the inner cavity of the air supply base 90, the annular flow dividing plate 92 partially surrounds the conical table 93, the annular baffle 94 on the top wall of the inner cavity of the air supply base 90 partially surrounds the annular flow dividing plate 92, and the inlet of the air supply pipe 10 is positioned on the upper edge of the side wall of the air; the annular main air duct 3 is formed by enclosing an air ring surface cover 1 and an air ring bottom cover 2, and the lower end of the air ring bottom cover 2 is uniformly provided with a plurality of six main air duct inlets 7 matched with air supply pipes;
arranging an air supply device such as a fan at the air supply inlet 91, wherein the airflow is upwards sprayed to the conical table 93 and is diffused from the flow distribution holes of the annular flow distribution plate 92 to the air supply base 90 under the guiding action of the conical table 93; part of the air flow flows out of the parts, which are not enclosed, of the annular splitter plate 92 and the conical table 93 to the inner wall of the annular baffle plate 94, is separated and blocked to be downward and converged with the air flow overflowing through the splitter holes to form uniform annular air flow, and flows upwards to each air supply pipe 10 under the blocking of the inner wall of the air supply base 90, so that each air supply pipe 10 supplies air to the annular main air duct 3 at balanced flow speed and flow rate;
air flow is supplied to the annular main air duct 3 from the lower part of the air ring bottom cover 2 through a plurality of air supply pipes 10, the annular main air duct 3 forms a three-stage annular stepped air duct which roundly turns downwards step by step from outside to inside, in addition, a diversion air ring 4 for separating the annular main air duct 3 is arranged in the second-stage annular stepped air duct 32, the diversion air ring 4 is uniformly provided with diversion air holes for communicating the annular main air ducts 3 at two sides of the diversion air ring 4, after the air flow enters the first-stage annular stepped air duct 31 from an external fan through the air supply pipes 10, the annular air flow is primarily and uniformly diffused to the periphery and roundly moves downwards to the outer side of the second-stage annular stepped air duct 32 around a first baffle plate 21 which is protruded upwards from the air ring bottom cover 2, then the air flow passes through the diversion air holes of the diversion air ring 4 to be refined and further homogenized, then the annular air flow bypasses a second baffle plate 22 which is protruded upwards from the air ring bottom cover 2 to the, at the moment, the airflow flow in each direction is highly uniform, and the airflow flows into the laminar airflow which uniformly flows inwards in the annular direction;
in the operation process, the secondary annular air duct 82 is axially adjusted through the air outlet adjusting ring 5, the size of a gap space of the secondary annular air duct 82 enclosed between the lower surface of the air outlet adjusting ring 5 and the upper surface of the air ring bottom cover 2 is controlled, an annular arc edge 51 for narrowing the secondary annular air duct 82 is formed by the downward protrusion of the bottom wall of the air outlet adjusting ring 5 to the upper folding area of the air outlet nozzle, when the air outlet adjusting ring 5 is axially adjusted to the lowest point, the annular arc edge 51 is attached to the air ring bottom cover 2 to seal the secondary annular air duct 82, and the lower protruding part on the outer side of the annular arc edge is downwards guided to an inlet hole array of the;
the air outlet adjusting ring 5 performs axial adjustment of the secondary annular air duct 82 through mutual screwing displacement of the threads on the outer wall and the threads on the inner wall of the air annular cover 1, by the arrangement mode, when the gap of the secondary annular air duct 82 is axially adjusted downwards by the air outlet adjusting ring 5, the contraction action of the annular arc edge 51 on the air flow enables the air flow to pass through the primary annular air duct 81, in a manner of small flow and high speed, after the viscous state film blank with lower initial extrusion stability is rapidly cooled, the secondary annular air duct 82 is subjected to flow reduction and speed increase, under the condition of not changing the total airflow flow, the speed increasing function of the primary and secondary annular air ducts 82 can be realized by the axial adjustment of the air outlet adjusting ring 5, under extreme conditions, the annular arc edge 51 can tightly press and close the secondary air duct, and reasonably control the flow of air flow, so that the primary air duct can cool the film blank of specific plastic by high-speed air flow at reasonable flow; in the above technical solution, the outlet of the primary annular air duct 81 is lower than the outlet of the secondary annular air duct 82, so that the air flow is converged from the outlet of the primary annular air duct 81 and the outlet of the secondary annular air duct 82 to form a mixed air path.
As shown in fig. 2-3, preferably, the innermost ring of the air ring bottom cover 2 is bent upwards to form a central ring wall 23, and is enclosed with the inner ring wall 61 formed by bending the innermost ring of the die head sleeve opening 6 upwards to form a primary annular air duct 81 outlet, the height of the inner ring wall 61 is lower than that of the central ring wall 23, by the structure, the air flow blown out from the primary annular air duct 81 outlet from bottom to top presents a slightly inward flowing air flow, so that a viscous state film blank with low initial extrusion stability can be blown out inwards, and the phenomenon of adhesion between the viscous state film blank and the inner ring wall 61 and the central ring wall 23 is avoided;
in addition, furthermore, the innermost ring of the air-out adjusting ring 5 is bent upwards to form an outer ring wall 52, the outer ring wall 52 is enclosed with the central ring wall 23 to form an outlet of a secondary annular air duct 82, the height of the central ring wall 23 is lower than that of the outer ring wall 52, and through the arrangement, the initially-cooled viscous-state film blank can be effectively blown inwards, so that the phenomenon of adhesion between the initially-cooled viscous-state film blank and the central ring wall 23 as well as the outer ring wall 52 is avoided; and the higher speed air flow is guided inward by the outer annular wall 52 when flowing through the outer annular wall 52, so that the air flow can obtain higher rising distance under the same air flow rate, and the forming effect of the film blank close to the frost line part is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A cooling device of a film blowing device comprises an air supply base, an air ring and an air supply pipe, and is characterized in that an upward air supply inlet is arranged in the center of the air supply base, annular airflow is supplied to an inner cavity of the air supply base through a flow dividing mechanism, the air supply pipe is uniformly arranged around the air supply base and is connected with the inner cavity of the air supply base and an annular main air duct, the annular main air duct is divided inwards to form a primary annular air duct and a secondary annular air duct, outlets of the primary annular air duct and the secondary annular air duct are converged, an inlet hole array of the primary annular air duct is circumferentially arranged on an air outlet adjusting ring, the air outlet adjusting ring is only used for adjusting the space size of the secondary annular air channel and simultaneously adjusting the flow rate of the primary annular air channel and the secondary annular air channel, the air outlet adjusting ring is provided with a closed structure for closing the secondary annular air channel, and the annular main air channel directly supplies air to the primary annular air channel in a closed state; the shunting mechanism comprises a conical table, an annular shunting plate and an annular baffle plate which are collinear with the axial lead of the air supply inlet, the tip of the conical table on the top wall of the inner cavity of the air supply base points downwards to the center of the air supply inlet, shunting holes are uniformly formed in the annular shunting plate on the bottom wall of the inner cavity of the air supply base, the annular shunting plate partially surrounds the conical table, the annular baffle plate partially surrounds the top wall of the inner cavity of the air supply base, and the air supply pipe inlet is positioned on the upper edge of the side wall of the air supply base and points to the annular baffle plate.
2. The cooling device of claim 1, wherein the annular main air duct is formed by surrounding an air ring cover with an air ring bottom cover, and the lower end of the air ring bottom cover is uniformly provided with a plurality of main air duct inlets matched with the air supply pipes.
3. The cooling device of claim 2, wherein the secondary annular air channel is axially adjusted by the air outlet adjusting ring to control the size of the gap between the lower surface of the air outlet adjusting ring and the upper surface of the air ring bottom cover, the sealing structure is formed by protruding the bottom wall of the air outlet adjusting ring to the upward folding region of the air outlet nozzle to form an annular arc edge and an air ring bottom cover which narrow the secondary annular air channel, and when the air outlet adjusting ring is axially adjusted to the lowest point, the annular arc edge and the air ring bottom cover are attached to and seal the secondary annular air channel.
4. The cooling device for a film blowing apparatus according to claim 2, wherein the inlet outlet of the primary annular duct is lower than the outlet of the secondary annular duct.
5. The cooling device for a blown film apparatus as claimed in claim 4, wherein the innermost ring of the die head cover of the air ring is bent upward to form an inner ring wall, the innermost ring of the bottom cover of the air ring is bent upward to form a central ring wall, a primary annular air duct outlet is formed by the enclosing between the central ring wall and the inner ring wall, and the height of the inner ring wall is lower than that of the central ring wall.
6. The cooling device for a film blowing apparatus as claimed in claim 4, wherein the innermost circumference of said air-out adjusting ring is bent upward to form an outer annular wall, and is enclosed with a central annular wall to form a secondary annular air duct outlet, and the height of said central annular wall is lower than that of said outer annular wall.
7. The cooling device for a film blowing apparatus according to any one of claims 1 to 6, wherein a branch air ring for dividing the annular main air passage is provided in the annular main air passage, and branch air holes for communicating the annular main air passages on both sides of the branch air ring are uniformly provided in the branch air ring.
8. The cooling device for a film blowing apparatus according to claim 7, wherein the annular main air duct forms a three-stage stepwise winding downward annular stepped air duct from outside to inside, and the splitter air ring is disposed in the second stage annular stepped air duct.
9. The cooling device of a film blowing apparatus as claimed in any one of claims 1 to 6, wherein the air outlet adjusting ring performs axial adjustment of the secondary annular air duct by mutual screwing displacement of the screw thread of the outer wall and the screw thread of the inner wall of the air annular cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810581593.3A CN108422650B (en) | 2018-06-07 | 2018-06-07 | Cooling device of blown film equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810581593.3A CN108422650B (en) | 2018-06-07 | 2018-06-07 | Cooling device of blown film equipment |
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| CN108422650A CN108422650A (en) | 2018-08-21 |
| CN108422650B true CN108422650B (en) | 2020-04-07 |
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| CN201810581593.3A Active CN108422650B (en) | 2018-06-07 | 2018-06-07 | Cooling device of blown film equipment |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111844706A (en) * | 2020-07-25 | 2020-10-30 | 孙乐强 | Plastic film blowing machine |
| CN112959571A (en) * | 2021-02-04 | 2021-06-15 | 深圳弘臻新材料科技有限公司 | Temperature control air disc for primary forming in PVC heat-shrinkable tube production process |
| CN113910509B (en) * | 2021-10-12 | 2024-03-01 | 江苏中大新材料科技有限公司 | Film blowing cooling mechanism for multi-mode operation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62267122A (en) * | 1986-05-15 | 1987-11-19 | Asahi Chem Ind Co Ltd | Cooling device for blown film |
| CN201192897Y (en) * | 2008-04-02 | 2009-02-11 | 詹文聪 | Cooling air ring of bag blowing machine |
| CN201313376Y (en) * | 2008-12-17 | 2009-09-23 | 佛山市顺德区捷勒塑料设备有限公司 | Adjustment mechanism of cooling device of tubular thin layer production equipment |
| CN105058767A (en) * | 2015-08-13 | 2015-11-18 | 武汉新中德塑机股份有限公司 | Cooling air ring for film blowing equipment |
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Effective date of registration: 20240701 Address after: 515071 No. 4 Anyang Second Street, Shantou Comprehensive Bonded Zone, Guangdong Province Patentee after: GUANGDONG MAOXIN INTELLIGENT EQUIPMENT Co.,Ltd. Country or region after: China Address before: 515000 Chaoyang Road, Jinyuan Industrial Area, Shantou, Guangdong (at the junction with Jinfeng Road) Patentee before: SHANTOU ZHONGXINLONG MACHINERY MANUFACTURING Co.,Ltd. Country or region before: China |