CN108422648B - Film blowing machine - Google Patents
Film blowing machine Download PDFInfo
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- CN108422648B CN108422648B CN201810402474.7A CN201810402474A CN108422648B CN 108422648 B CN108422648 B CN 108422648B CN 201810402474 A CN201810402474 A CN 201810402474A CN 108422648 B CN108422648 B CN 108422648B
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- powder spraying
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- 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
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- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention belongs to the field of blow molding equipment, and particularly discloses a film blowing machine, which comprises a film bubble blowing device of the film blowing machine, a contact heater and a pressure powder spraying ring, wherein a bidirectional negative pressure ring is rotationally connected above the film bubble blowing device of the film blowing machine and comprises an upper ring plate, the lower ring plate, be fixed with a plurality of powder blowing blades that lead the air current to the top on the upper ring plate, be fixed with a plurality of suction blades that lead the air current to the below on the lower ring plate, be fixed with the hot plate that separates the air current that will blow the air current that powder blade produced and suction blades produced between upper ring plate and the lower ring plate, heater and hot plate contact, pressure powder spraying ring is located the top of hot plate, the below of pressure powder spraying ring is equipped with a plurality of powder spraying mouths, the powder spraying mouth equipartition is in the lower part of pressure powder spraying ring, it has the shrouding that is used for the shutoff powder spraying mouth to articulate on the pressure powder spraying ring, the one end that the powder spraying mouth was kept away from to the shrouding can offset with. The device solves the problem that the production efficiency is low because the powder spraying port needs to be stopped and cleaned in the prior art.
Description
Technical Field
The invention belongs to the field of blow molding equipment, and particularly relates to a film blowing machine.
Background
The film blowing machine is a plastic film processing device, which heats and melts plastic particles and then blows the plastic particles into a film. As shown in fig. 1, the film blowing machine for heat shrinkable film by twice molding method in the prior art includes an extruder 1 ', a mold 2 ', an air ring 3 ', a first traction roller mechanism 4 ', a heating water tank 5 ', a second traction roller mechanism 6 ', a shaping water jacket 7, a lower frame 8 ', a rotary fluted disc 9 ', a middle frame 10 ', an upper frame 11 ', a third traction roller mechanism 12 ', a double-station winding mechanism 13 ', a rotary conducting ring 14 ', a fourth traction mechanism 15 ' and a crane 16 '. When the device works, the film bubble made by the extruder 1 ', the die 2' and the wind ring 3 'enters the electric hot water tank 5', and after the secondary forming method blowing and expanding processing, the finished plastic film is rolled into a cylinder under the action of the traction mechanism.
However, in the working process of the film blowing machine, the film bubble is soaked in the hot water of the heating water tank 5 'for blowing, the second traction roller mechanism 6' is arranged in the heating water tank 5 ', and the film bubble is easy to adhere under the action of the second traction roller mechanism 6', so that the material with larger viscosity after being heated can not be blown and processed. In addition, the three-bubble processing method (to obtain a larger transverse shrinkage rate) cannot be performed, and since the film subjected to the two-time inflation processing is heated after entering the electric hot water tank 5 'and then is restored to the state before inflation, the film subjected to the two-time inflation processing cannot be subjected to the third inflation processing in the electric hot water tank 5'.
Patent document with the grant number of CN102941671B discloses a inflation device of inflation film manufacturing machine membrane bubble, including hot water spray set, design water jacket, pair roller drive mechanism, hourglass fill and deflector roll, the design water jacket set up in hot water spray set's top, pair roller drive mechanism set up in hot water spray set's below, leak the fill set up in pair roller drive mechanism's below, the deflector roll is in the fill below of leaking. The scheme can carry out the inflation processing on the material with larger viscosity after being heated, and in addition, the heat shrinkable film which is subjected to the inflation twice can be subjected to the third inflation processing by the invention. However, in this solution, the film bubble is heated by hot water to blow the film forming tube, and the film tube adhered with hot water or attached with moisture is sprayed with lubricant powder to prevent the adhesion between the film tapes due to high temperature. The powder becomes arc-shaped or colloid when meeting water (gas), and the powder spraying port spraying the powder is blocked. The existing solution is to clean the powder spraying port after a period of production, and the powder spraying port needs to be shut down when being cleaned, so that the production efficiency is greatly reduced.
Disclosure of Invention
The invention aims to provide a film blowing machine to solve the problem of low production efficiency caused by the fact that a machine needs to be stopped to clean a powder spraying port in the prior art.
In order to achieve the aim, the basic scheme of the invention provides a film blowing machine, which comprises a film bubble blowing device of the film blowing machine, a contact type heater and a pressure powder spraying ring, wherein a bidirectional negative pressure ring is rotationally connected above the film bubble blowing device of the film blowing machine and comprises an upper ring plate, the lower ring plate, be fixed with a plurality of powder blowing blades that lead the air current to the top on the upper ring plate, be fixed with a plurality of suction blades that lead the air current to the below on the lower ring plate, be fixed with the hot plate that separates the air current that will blow the air current that powder blade produced and suction blades produced between upper ring plate and the lower ring plate, heater and hot plate contact, pressure powder spraying ring is located the top of hot plate, the below of pressure powder spraying ring is equipped with a plurality of powder spraying mouths, the powder spraying mouth equipartition is in the lower part of pressure powder spraying ring, it has the shrouding that is used for the shutoff powder spraying mouth to articulate on the pressure powder spraying ring, the one end that the powder spraying mouth was kept away from to the shrouding can offset with.
The principle of the basic scheme is as follows: the film bubble blowing device of the film blowing machine in the prior art is utilized to blow the film bubble into the film forming cylinder by hot water. The bidirectional negative pressure ring is rotated, the film barrel passes through the bidirectional negative pressure ring during conveying, the powder blowing blade drives air above the heating plate to generate upward airflow and the air suction blade drives air below the heating plate to generate downward airflow when the bidirectional negative pressure ring rotates. The heater is started, the heater heats the heating plate, the space above and below the heating plate is heated by the heat radiation of the heating plate, and the heat blocking of the upper ring plate and the lower ring plate is slower in heat dissipation to the outside of the bidirectional negative pressure ring. When the bidirectional negative pressure ring rotates, the powder blowing blades are in contact with one end of the sealing plate, which is far away from the powder spraying port, so that the sealing plate rotates, the powder spraying port leaks in the rotating process of the sealing plate, and the lubricating powder in the pressure powder spraying ring is sprayed out from the powder spraying port. When the shrouding no longer with blow whitewashed blade contact, the shrouding is once more plugged up the mouth of dusting, when blowing blade contacts with the shrouding once more, the mouth of dusting spills once more, realizes the space of the top of intermittent type nature with the spun powder of lubricating to the hot plate. In this way, the air heated by the heating plate is blown downward by the suction blade to dry the outer periphery of the film tube. The lubricant powder heated by the heating plate is blown upward by the airflow generated by the powder blowing blade and adheres to the dried film tube.
The beneficial effect of this basic scheme lies in: 1. the device realizes the drying and powder spraying of the film barrel, and prevents excessive water mixed lubricating powder from forming jelly to block a powder spraying port.
2. The device locates the powder spraying port at a place far away from the film barrel, and utilizes the powder blowing blade to contact the lubricating powder with the film barrel, thereby further avoiding blockage caused by the contact of the powder spraying port with moisture.
3. The device heats the sprayed lubricating powder, so that water vapor is not easy to form water drops and is combined with the lubricating powder into a cluster, and the blockage of a powder spraying port is further avoided.
4. The powder blowing blades are matched with the sealing plate in the device, so that the powder spraying port intermittently sprays lubricating powder, the lubricating powder is prevented from being sprayed too much at one time and being accumulated on the heating plate, and the sprayed lubricating powder is guided to the film barrel by air flow, so that the opportunity of contact between water vapor and the lubricating powder is reduced.
5. The heating plate separates the lubricant spraying space from the drying space in the device, and blows water gas to the lubricant spraying space when preventing drying, thereby further avoiding blockage caused by contact of moisture at the powder spraying port.
The first optimization scheme is as follows: the film cylinder conveying device is characterized by further comprising a transmission wheel for conveying the film cylinder, a rotating shaft is fixedly connected onto the transmission wheel, a transmission gear is fixedly connected onto the rotating shaft, and a transmission gear ring meshed with the transmission gear is fixedly connected to the lower portion of the bidirectional negative pressure ring. The power of the driving wheel is used for driving the bidirectional negative pressure ring to rotate, so that the situation that the negative pressure bidirectional ring rotates due to the fact that driving equipment is arranged independently is avoided, and cost is saved.
And the second optimization scheme is as follows: the contact part of the heating plate and the heater is arc-shaped plate-shaped. The arc-shaped plate-shaped contact part increases the contact area with the heater, and the heating efficiency is improved.
And the optimization scheme is three: the contact part of the heating plate and the heater is cylindrical. The cylindrical contact part encloses the upper part and the lower part of the heating plate into two closed spaces, so that air or lubricating powder in the heating plate can be conveniently heated, and the heating plate can be always contacted with the heater when the bidirectional negative pressure ring rotates.
And the optimization scheme is four: the heating plate is made of copper. The heating plate made of copper has high heat conductivity, and the heating efficiency of the heating plate is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a schematic structural diagram of a film blowing machine according to an embodiment of the present invention;
FIG. 3 is an enlarged view taken at A in FIG. 2;
fig. 4 is a sectional view in the direction B in fig. 3.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a shaping water jacket 1, a conveying wheel 2, a hot water spray device 3, a transmission gear 4, a heater 5, a heating plate 6, a pressure powder spraying ring 7, an upper ring plate 8, a sealing plate 9, powder blowing blades 10, air suction blades 11, a lower ring plate 12 and a powder spraying port 13.
Example (b): the film blowing machine in the scheme is shown in fig. 2, fig. 3 and fig. 4, and comprises a frame, a driving wheel for conveying a film cylinder, a film bubble blowing device of the film blowing machine, a pressure powder spraying ring 7 and a contact type heater 5, wherein the bidirectional negative pressure ring is positioned above a shaping water jacket 1 in the film bubble blowing device of the film blowing machine, and is rotationally connected to the frame. The transmission wheel is driven by a motor, a rotating shaft is coaxially and fixedly connected to the transmission wheel, a transmission gear 4 is coaxially and fixedly connected to the rotating shaft, and a transmission gear ring meshed with the transmission gear 4 is fixedly connected to the lower portion of the bidirectional negative pressure ring.
The bidirectional negative pressure ring comprises an upper ring plate 8 and a lower ring plate 12, five powder blowing blades 10 which guide airflow to the upper part are fixed on the upper ring plate 8, five suction blades 11 which guide the airflow to the lower part are fixed on the lower ring plate 12, and the different directions of the airflow are guided by setting the inclination angles of the powder blowing blades 10 and the suction blades 11.
A heating plate 6 for separating the air flow generated by the powder blowing blade 10 from the air flow generated by the air suction blade 11 is fixed between the upper ring plate 8 and the lower ring plate 12, and the heating plate 6 is positioned between the powder blowing blade 10 and the air suction blade 11. The pressure powder spraying ring 7 is positioned above the heating plate 6, five powder spraying ports 13 are formed below the pressure powder spraying ring 7, and the powder spraying ports 13 are uniformly distributed at the lower part of the pressure powder spraying ring 7. The pressure powder spraying ring 7 is hinged with a sealing plate 9 for sealing the powder spraying port 13, and one end of the sealing plate 9 far away from the powder spraying port 13 can be abutted against the rotating powder blowing blade 10. The heating plate 6 is made of copper, the contact part of the heating plate 6 and the heater 5 is in a cylindrical shape, and the heater 5 is in contact with the cylindrical outer wall of the heating plate 6.
When the film forming device works, the film bubble is introduced into the hot water spraying device 3 through the conveying wheel 2, the film bubble is heated and blown through hot water spraying, and the film bubble is blown into the film forming cylinder through the hot water. The bidirectional negative pressure ring is rotated, the film cylinder passes through the bidirectional negative pressure ring during transmission, the powder blowing blades 10 drive air above the heating plate 6 to generate upward air flow and the air suction blades 11 drive air below the heating plate 6 to generate downward air flow when the bidirectional negative pressure ring rotates. The heater 5 is started, the heater 5 heats the heating plate 6, and the heat radiation of the heating plate 6 heats the closed space above and below the heating plate 6.
When the bidirectional negative pressure ring rotates, the powder blowing blades 10 are in contact with one end, far away from the powder spraying port 13, of the sealing plate 9, so that the sealing plate 9 rotates around a hinge point, in the rotating process of the sealing plate 9, the powder spraying port 13 leaks, and the lubricating powder in the pressure powder spraying ring 7 is sprayed out from the powder spraying port 13. When the sealing plate 9 is not contacted with the powder blowing blades 10 any more, the sealing plate 9 blocks the powder spraying port 13 again, and when the powder blowing blades are contacted with the sealing plate 9 again, the powder spraying port 13 leaks out again, so that the lubricating powder is intermittently sprayed to the space above the heating plate 6. The air heated by the heating plate 6 is blown downward by the suction blade 11, and dries the outer periphery of the film tube. The lubricant powder heated by the heating plate 6 is blown upward by the air flow generated by the powder blowing blade 10 and adheres to the dried film tube.
The above description is only an example of the present invention and common general knowledge in the art is not described here too much. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (5)
1. The film blowing machine comprises a film bubble blowing device of the film blowing machine and is characterized by also comprising a contact heater and a pressure powder spraying ring, wherein a bidirectional negative pressure ring is rotationally connected above the film bubble blowing device of the film blowing machine and comprises an upper ring plate, the lower ring plate, be fixed with a plurality of powder blowing blades that lead the air current to the top on the upper ring plate, be fixed with a plurality of suction blades that lead the air current to the below on the lower ring plate, be fixed with the hot plate that separates the air current that will blow the air current that powder blade produced and suction blades produced between upper ring plate and the lower ring plate, heater and hot plate contact, pressure powder spraying ring is located the top of hot plate, the below of pressure powder spraying ring is equipped with a plurality of powder spraying mouths, the powder spraying mouth equipartition is in the lower part of pressure powder spraying ring, it has the shrouding that is used for the shutoff powder spraying mouth to articulate on the pressure powder spraying ring, the one end that the powder spraying mouth was kept away from to the shrouding can offset with.
2. The film blowing machine of claim 1, wherein: the film cylinder conveying device is characterized by further comprising a transmission wheel for conveying the film cylinder, a rotating shaft is fixedly connected onto the transmission wheel, a transmission gear is fixedly connected onto the rotating shaft, and a transmission gear ring meshed with the transmission gear is fixedly connected to the lower portion of the bidirectional negative pressure ring.
3. The film blowing machine of claim 2, wherein: the contact part of the heating plate and the heater is arc-shaped plate-shaped.
4. The film blowing machine of claim 2, wherein: the contact part of the heating plate and the heater is cylindrical.
5. The film blowing machine of claim 1, 2, 3 or 4, wherein: the heating plate is made of copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810402474.7A CN108422648B (en) | 2018-04-28 | 2018-04-28 | Film blowing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810402474.7A CN108422648B (en) | 2018-04-28 | 2018-04-28 | Film blowing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108422648A CN108422648A (en) | 2018-08-21 |
| CN108422648B true CN108422648B (en) | 2020-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810402474.7A Active CN108422648B (en) | 2018-04-28 | 2018-04-28 | Film blowing machine |
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| Country | Link |
|---|---|
| CN (1) | CN108422648B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1462771A (en) * | 1965-01-11 | 1966-12-16 | Polymer Processing Res Inst | Biaxial post-stretching process for thermoplastic tubular films |
| GB2166081B (en) * | 1984-10-08 | 1988-09-28 | Windmoeller & Hoelscher | Apparatus for cooling a tubular plastics film extruded from a film blowing head |
| CN1572470A (en) * | 2003-06-17 | 2005-02-02 | 莱芬豪机械两合有限公司 | Method and device for making thin film by thermoplastic material |
| CN203046247U (en) * | 2012-12-06 | 2013-07-10 | 上海通冷包装材料有限公司 | Film bubble huffing device of film blowing machine |
-
2018
- 2018-04-28 CN CN201810402474.7A patent/CN108422648B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1462771A (en) * | 1965-01-11 | 1966-12-16 | Polymer Processing Res Inst | Biaxial post-stretching process for thermoplastic tubular films |
| GB2166081B (en) * | 1984-10-08 | 1988-09-28 | Windmoeller & Hoelscher | Apparatus for cooling a tubular plastics film extruded from a film blowing head |
| CN1572470A (en) * | 2003-06-17 | 2005-02-02 | 莱芬豪机械两合有限公司 | Method and device for making thin film by thermoplastic material |
| CN203046247U (en) * | 2012-12-06 | 2013-07-10 | 上海通冷包装材料有限公司 | Film bubble huffing device of film blowing machine |
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| Publication number | Publication date |
|---|---|
| CN108422648A (en) | 2018-08-21 |
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