CN220008807U

CN220008807U - Film blowing machine

Info

Publication number: CN220008807U
Application number: CN202321636719.5U
Authority: CN
Inventors: 邢小元
Original assignee: Nanjing Fushun Plastic Industry Co ltd
Current assignee: Nanjing Fushun Plastic Industry Co ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2023-11-14
Anticipated expiration: 2033-06-26

Abstract

The utility model discloses a film blowing machine, which comprises an inner film die head, a cooling device, an inner air pipe and an outer air pipe, wherein the cooling device is positioned at the central position of the inner film die head, the outer air pipe is arranged inside the inner film die head, the inner air pipe is nested in the outer air pipe, the cooling device comprises a cylindrical cooling table, a first cooling chamber and a second cooling chamber are arranged in the cooling table at intervals up and down, the first cooling chamber is communicated with the second cooling chamber through a water pipe, a first ventilation channel is formed between the first cooling chamber and the second cooling chamber, a second ventilation channel is formed between the second cooling chamber and the bottom wall of the cooling table, the first ventilation channel is communicated with an air inlet cavity through a plurality of first air inlets, and the second ventilation channel is communicated with the air inlet cavity through a plurality of second air inlets; according to the utility model, the cooling device and the cooling pipe act together on the inner air pipe to absorb heat and cool the hot air in the inner air pipe, so that the temperature change of the cooling air caused by the high temperature of the outer wall of the inner air pipe can be avoided.

Description

Film blowing machine

Technical Field

The utility model relates to the technical field of plastic film blowing machines, in particular to a film blowing machine.

Background

A film blowing machine is an apparatus for producing plastic films. In the production process, the plastic melt is extruded upwards from the annular extrusion port to form a film bubble, the film bubble is pulled to move upwards continuously, the cooling mechanism continuously blows cooling air to cool the film bubble, the film bubble is condensed, most of cooling modes are internal cooling, cooling air flow in the centrifugal direction is blown from the annular air outlet, and cooling is carried out from the inside of the film bubble.

The existing film blowing machine has the following defects: because the air temperature that flows in the interior tuber pipe is higher (because this part air has been heated by the membrane bubble of high temperature), and the pipe wall cover of interior tuber pipe is in outer tuber pipe wall the inside, and interior tuber pipe wall is the metal material that very easily conducts heat, therefore interior tuber pipe wall temperature is higher a lot for outer tuber pipe wall, and then leads to following problem: the temperature of the part of the cooling air in the air inlet cavity formed between the inner air pipe and the outer air pipe, which is close to the pipe wall of the inner air pipe, is high (the part is called hotter air), and the temperature of the part, which is close to the pipe wall of the outer air pipe, is low (the part is called colder air), namely the temperature of each part of the cooling air is seriously uneven, which leads to uneven air temperature for finally cooling each part of the film bubble, and influences the uniformity of film blowing forming quality.

Disclosure of Invention

The utility model aims to solve the problem that the molding quality of the film blowing is affected by uneven heating of cooling air in a film blowing machine in the prior art.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a inflation film manufacturing machine, it includes the inner membrance die head, cooling device, the inner tuber pipe of vertical setting, and the outer tuber pipe of vertical setting, cooling device is located the central point of inner membrance die head, the annular extrusion mouth that is located the cooling device outside has been seted up to the up end of inner membrance die head, inner tuber pipe downwardly extending and pass the central point of inner membrance die head and cooling device in proper order, outer tuber pipe sets up in the inside and inner tuber pipe nest in outer tuber pipe of inner tuber pipe, the central axis of inner tuber pipe and outer tuber pipe overlaps with the central axis of inner membrance die head and cooling device, form the air inlet chamber between inner tuber pipe and the outer tuber pipe, the lumen of inner tuber pipe forms the air-out chamber, cooling device includes cylindrical cooling platform, cup joint in the annular blast cap in the cooling platform outside, and set up in the apron on annular blast cap top, the inside upper and lower interval of cooling platform is provided with first cooling chamber and second cooling chamber, first cooling chamber and second cooling chamber are linked together through the water pipe, form first ventilation channel between first cooling chamber and the second cooling chamber and the cooling platform diapire form the second ventilation channel, the second ventilation channel between the bottom wall, the bottom of first ventilation channel and the second ventilation channel are linked together through a plurality of second ventilation channel that sets up.

As a preferable mode of the film blowing machine of the utility model, wherein: the cooling table is made of metal materials, a water inlet and a water outlet are respectively arranged on two sides of the first cooling chamber and the second cooling chamber, and the water inlet and the water outlet are respectively connected with a water inlet pipe and a water outlet pipe.

As a preferable mode of the film blowing machine of the utility model, wherein: the water pipe channels positioned at the inner side of the annular extrusion port are arranged on two sides of the upper end face of the inner film die head, the two water pipe channels are respectively communicated with the outer side wall of the inner film die head, the water inlet pipe and the water outlet pipe are arranged in the water pipe channels, and the end parts of the water inlet pipe and the water outlet pipe are respectively connected with an external water inlet pump and an external water suction pump.

As a preferable mode of the film blowing machine of the utility model, wherein: the outer wall of the inner air pipe is sleeved with a cylindrical cooling pipe, the inner wall of the cooling pipe and the outer wall of the inner air pipe form a heat absorption cavity, a plurality of air outlet holes and a plurality of third air inlet holes are respectively formed in the top wall and the bottom wall of the cooling pipe in the circumferential direction, and the positions of the plurality of air outlet holes and the positions of the plurality of first air inlet holes correspond to each other.

As a preferable mode of the film blowing machine of the utility model, wherein: through holes are uniformly distributed in the circumferential direction of the annular blowing cover.

As a preferable mode of the film blowing machine of the utility model, wherein: the air outlet cavity is communicated with an exhaust fan arranged outside the inner film die head, and the air inlet cavity is communicated with a blower arranged outside the inner film die head.

The utility model has the beneficial effects that: according to the utility model, the cooling device and the cooling pipe act together on the inner air pipe to absorb heat and cool the hot air in the inner air pipe, so that the temperature change of the cooling air caused by the high temperature of the outer wall of the inner air pipe can be avoided, the cooling air from the cooling device is heated more uniformly, and the molding quality of the blown film is better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a cross-sectional view of a film blowing machine.

Fig. 2 is an enlarged view at S in fig. 1.

Fig. 3 is an overall schematic diagram of a film blowing machine.

Fig. 4 is a schematic view of the overall structure of the film blowing machine after the annular blowing hood is removed.

Detailed Description

The utility model is described in detail below with reference to the drawings and examples.

Referring to fig. 1-4, this embodiment is a film blowing machine, including inner film die head 1, cooling device 2, the inner air pipe 3 of vertical setting, and the outer air pipe 4 of vertical setting, cooling device 2 is located the central point of inner film die head 1, annular extrusion mouth 5 in the cooling device 2 outside has been seted up to the up end of inner film die head 1, inner air pipe 3 downwardly extending and pass the central point of inner film die head 1 and cooling device 2 in proper order, outer air pipe 4 sets up in inner film die head 1 inside and inner air pipe 3 nest in outer air pipe 4, the central axis of inner air pipe 3 and outer air pipe 4 overlaps with the central axis of inner film die head 1 and cooling device 2, form air inlet chamber a between inner air pipe 3 and the outer air pipe 4, the lumen of inner air pipe 3 forms air outlet chamber B, cooling device 2 includes cylindrical cooling table 21, cup joint in the annular blast cap 22 in the cooling table 21 outside, and set up the apron 23 in annular blast cap 22 top, the inside upper and lower interval of cooling table 21 is provided with first cooling chamber 21a and second cooling chamber 21B, first cooling chamber 21a and second cooling chamber 21B are linked together through a plurality of second cooling chamber 21c and a plurality of second air inlet channel 21d, a plurality of air inlet channel 21d are formed between the second cooling chamber and the second air inlet 21c and the second air inlet channel 21d is linked together, a plurality of second air inlet channel 21d is formed to the second air inlet channel 21d is linked together.

In this embodiment, the cooling table 21 is made of metal, two sides of the first cooling chamber 21a and the second cooling chamber 21b are respectively provided with a water inlet 21e and a water outlet 21f, and the water inlet 21e and the water outlet 21f are respectively connected with the water inlet pipe 6 and the water outlet pipe 7.

The water is injected into the first cooling chamber 21a through the water inlet pipe 6, then enters the second cooling chamber 21b through the water pipe 21g, and flows out along the water outlet pipe 7, and the cooling table 21 is made of metal materials, so that the water in the first cooling chamber 21a and the second cooling chamber 21b can cool and absorb heat to cooling air, and the flowing water can cool the cooling air in the first ventilating duct 21c and the second ventilating duct 21 d.

In this embodiment, two sides of the upper end surface of the inner film die head 1 are provided with water pipe channels 8 located at the inner side of the annular extrusion port 5, the two water pipe channels 8 are respectively communicated with the outer side wall of the inner film die head 1, and a water inlet pipe 6 and a water outlet pipe 7 are arranged in the water pipe channels 8 and the end parts are respectively connected with an external water inlet pump and an external water suction pump.

The water pump (not shown in the drawing) conveys water into the water inlet pipe 6, the water in the first cooling chamber 21a and the second cooling chamber 21b is pumped away by the water suction pump (not shown in the drawing), the water is driven to flow, and the water after heat absorption and temperature rise is timely pumped away.

In this embodiment, the outer wall of the inner air pipe 3 is sleeved with a cylindrical cooling pipe 11, the inner wall of the cooling pipe 11 and the outer wall of the inner air pipe 3 form a heat absorbing cavity 11a, the top wall and the bottom wall of the cooling pipe 11 are respectively provided with a plurality of air outlet holes 11b and a plurality of third air inlet holes 11c in the circumferential direction, and the positions of the plurality of air outlet holes 11b and the plurality of first air inlet holes 21c-1 correspond to each other.

When cooling air enters from the air inlet cavity A, a part of cooling air enters into the cooling pipe 11 through a plurality of third air inlet holes 11c at the bottom wall of the cooling pipe 11, and as the inner air pipe 3 sucks air heated at a high temperature above the inside of the bubble, the temperature of air flowing in the inner air pipe 3 is higher, so that the temperature of the outer wall of the inner air pipe 3 is higher, the passing cooling air can be heated, the heated cooling air enters into the first air channel 21c through a plurality of air outlet holes 11b and a plurality of first air inlet holes 21c-1, and the cooling air which does not enter into the cooling pipe 11 enters into the second air channel 21 from a plurality of second air inlet holes 21 d-1.

In this embodiment, through holes 22a are uniformly distributed in the circumferential direction of the annular blowing hood 22.

The cooling air cooled from the inside of the first air passage 21c and the second air passage 21 is uniformly blown toward the film bubble through the through holes 22a on the annular blower cover 22, so that the film bubble molding is more uniform.

In this embodiment, the air outlet cavity B is communicated with an exhaust fan arranged outside the inner film die head 1, and the air inlet cavity a is communicated with a blower arranged outside the inner film die head 1.

The blower (not shown) blows air into the air inlet cavity A, the exhaust fan (not shown) pumps out hot air in the air outlet cavity B, so as to realize the flow of the air and bring the hot air out

Working principle: the blower (not shown in the drawing) and the exhaust fan (not shown in the drawing) are opened to realize the flow of air in the air inlet cavity A and the air outlet cavity B, the water inlet pump (not shown in the drawing) and the water suction pump (not shown in the drawing) are opened to realize the flow of water in the first cooling cavity 21a and the second cooling cavity 21B, the plastic melt is extruded upwards from the annular extruding opening 5 to form a film bubble, the film bubble is pulled to move upwards continuously, the film bubble is heated, the film bubble has high temperature, the temperature of the air in the formed film bubble is high, the blower (not shown in the drawing) sends cooling air into the air inlet cavity A, after the cooling air enters from the air inlet cavity A, a part of the cooling air enters into the cooling pipe 11 through a plurality of third air inlet holes 11c at the bottom wall of the cooling pipe 11, and as the inner air pipe 3 sucks the air heated by the high temperature above the film bubble, the temperature of the air flowing in the inner air pipe 3 is higher, so that the temperature of the outer wall of the inner air pipe 3 is higher, the passing cooling air is heated, the heated cooling air enters the first air channel 21c through the plurality of air outlet holes 11B and the plurality of first air inlet holes 21c-1, the cooling air which does not enter the cooling pipe 11 enters the second air channel 21 from the plurality of second air inlet holes 21d-1, the cooling air entering the first air channel 21c absorbs heat by the water flowing in the first cooling chamber 21a and the second cooling chamber 21B, the cooling air entering the second air channel 21 absorbs heat by the water flowing in the second cooling chamber 21B, the cooling air which passes through the cooling air passing through the first air channel 21c and the second air channel 21 passes through the through holes 22a on the annular air blowing cover 22 is uniformly blown to the film bubble, so that the film bubble is formed more uniformly.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims

1. A film blowing machine, characterized in that: including inner membrance die head (1), cooling device (2), the interior tuber pipe (3) of vertical setting, and the outer tuber pipe (4) of vertical setting, the central point that cooling device (2) are located inner membrance die head (1) puts, annular extrusion mouth (5) that are located cooling device (2) outside are offered to the up end of inner membrance die head (1), the central point that inner tuber pipe (3) downwardly extending and pass inner membrance die head (1) and cooling device (2) in proper order, outer tuber pipe (4) set up in the inside of inner membrance die head (1) and inner tuber pipe (3) nest in outer tuber pipe (4), the central axis of inner tuber pipe (3) and outer tuber pipe (4) overlaps with the central axis of inner membrance die head (1) and cooling device (2), form air inlet chamber (A) between inner tuber pipe (3) and outer tuber pipe (4), the lumen of inner tuber pipe (3) forms air outlet chamber (B), cooling device (2) include cylindrical cooling table (21), cup joint in annular blast cap (22) outside cooling table (21), and set up in annular blast cap (22) top end cover plate (21) inside of cooling table (21) and cooling table (21) interval cooling chamber (21 a) down are set up, the first cooling chamber (21 a) and the second cooling chamber (21 b) are communicated through a water pipe (21 g), a first ventilation channel (21 c) is formed between the first cooling chamber (21 a) and the second cooling chamber (21 b), a second ventilation channel (21 d) is formed between the second cooling chamber (21 b) and the bottom wall of the cooling table (21), the bottom end of the first ventilation channel (21 c) is communicated with the air inlet cavity (A) through a plurality of first air inlets (21 c-1) which are circumferentially arranged, and the bottom end of the second ventilation channel (21 d) is communicated with the air inlet cavity (A) through a plurality of second air inlets (21 d-1) which are circumferentially arranged.

2. A film blowing machine as defined in claim 1, wherein: the cooling table (21) is made of metal materials, a water inlet (21 e) and a water outlet (21 f) are respectively formed in two sides of the first cooling chamber (21 a) and the second cooling chamber (21 b), and the water inlet (21 e) and the water outlet (21 f) are respectively connected with a water inlet pipe (6) and a water outlet pipe (7).

3. A film blowing machine as defined in claim 2, wherein: the two sides of the upper end surface of the inner film die head (1) are provided with water pipe channels (8) positioned at the inner side of the annular extrusion port (5), the two water pipe channels (8) are respectively communicated with the outer side wall of the inner film die head (1), and the water inlet pipe (6) and the water outlet pipe (7) are arranged in the water pipe channels (8) and the end parts of the water inlet pipe and the water outlet pipe are respectively connected with an external water inlet pump and an external water suction pump.

4. A film blowing machine as defined in claim 1, wherein: the outer wall of the inner air pipe (3) is sleeved with a cylindrical cooling pipe (11), a heat absorption cavity (11 a) is formed between the inner wall of the cooling pipe (11) and the outer wall of the inner air pipe (3), a plurality of air outlet holes (11 b) and a plurality of third air inlet holes (11 c) are respectively formed in the top wall and the bottom wall of the cooling pipe (11) in the circumferential direction, and the positions of the plurality of air outlet holes (11 b) and the positions of the plurality of first air inlet holes (21 c-1) correspond.

5. A film blowing machine as defined in claim 1, wherein: through holes (22 a) are uniformly distributed in the circumferential direction of the annular blowing cover (22).

6. A film blowing machine as defined in claim 1, wherein: the air outlet cavity (B) is communicated with an exhaust fan arranged outside the inner film die head (1), and the air inlet cavity (A) is communicated with a blower arranged outside the inner film die head (1).