A modular oven for producing biaxially oriented plastic films

Abstract

The present invention relates to the technical field of modular ovens, and specifically to a modular oven for producing biaxially stretched plastic films, comprising a modular base and a film drying tube, wherein clamping mechanisms are arranged on both sides of the film drying tube, and the plastic film is clamped by two groups of clamping mechanisms so that the plastic film is suspended in the film drying tube, and a plurality of groups of internal threaded holes are opened in the lower end of the film drying tube, and the upper ends of the internal threaded holes are connected with a square cavity, and a square plate is slidably connected in the square cavity; by dividing the oven into two parts, namely, the film drying tube and the modular base, the oven is more convenient to transport, and at the same time, when the film drying tube and the modular base are spliced ​​and installed, the high-temperature silicone plate will be plugged into the annular installation groove, and when the installation is completed, the liquid pushing mechanism will push the sealant into the gap between the annular installation groove and the high-temperature silicone plate, so as to achieve the blocking between the film drying tube and the modular base.

Description

Technical Field

[0001] The invention relates to the technical field of modular ovens, in particular to a modular oven for producing biaxially stretched plastic films. Background Art

[0002] For example, the Chinese patent with announcement number CN213919220U discloses a biaxially stretched film suspension oven, including a box body, in which a fan assembly and a return air and fresh air supplement system are arranged, and the fan assembly is connected to the return air and fresh air supplement system, and is characterized in that: the fan assembly includes a fan, an air duct and a static pressure buffer box symmetrically arranged as above, each fan is connected to a plurality of air ducts, each air duct is matched with a corresponding air duct valve, the air duct is connected to the static pressure buffer box, an air supply box is arranged in the static pressure buffer box, and partitions are arranged on the top and sides of the air supply box, the partitions are provided with evenly distributed ventilation holes, and an air supply outlet is provided at the mouth of the air supply box.

[0003] However, the above scheme has the following shortcomings: in the above patent, by adjusting the opening and closing degree of the valve, the upper and lower wind speeds meet the set requirements, and the wind speed of the lower air duct is slightly greater than the wind speed of the upper air duct, so that the film whose edges have been cut and is not subject to the tension of the lateral chain clamp has an upward buoyancy and reaches a balance point. However, due to the large overall size of some drying boxes used, it is often impossible to transport the oven to the production area by direct transportation. At this time, the oven needs to be divided into scattered parts and sent to the site for splicing and installation, which leads to prolonged installation time and inconvenient on-site construction. For this reason, we have launched a modular oven for the production of biaxially oriented plastic films. Summary of the invention

[0004] The object of the present invention is to provide a modular oven for producing biaxially oriented plastic films to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A modular oven for producing biaxially stretched plastic film, comprising a modular base and a film drying tube, wherein clamping mechanisms are arranged in both sides of the film drying tube, and the plastic film is clamped by two groups of clamping mechanisms so that the plastic film is suspended in the film drying tube, and a plurality of groups of internal threaded holes are arranged in the lower end of the film drying tube, and the upper ends of the internal threaded holes are connected with a square cavity, and the square cavity is arranged in the film drying tube, and a square plate is slidably connected in the square cavity, and a cutter is fixedly connected to the upper end of the square plate, and a first traction rope and a second traction rope are respectively arranged on the upper side of the cutter, one end of the first traction rope is fixedly connected with the square cavity, and the other end extends into the annular cavity and is connected with a liquid pushing mechanism, and the annular cavity is arranged in the film drying tube, and the annular cavity is connected with an annular mounting groove, and the annular mounting groove is arranged in the lower end of the film drying tube, and when a plurality of groups of first traction ropes are cut off, the liquid pushing mechanism is freed from the limit and moves downward to push the sealant from the annular cavity into the annular mounting groove;

[0007] One end of the second traction rope is fixedly connected to the square cavity, and the other end is fixedly connected to the clamping mechanism, the clamping mechanism is arranged in the film drying tube, a plurality of sets of fixing screws are arranged in the upper end of the modular base, a clamping hole is opened in the outer side of the fixing screw, the fixing screw is screwed in the internal threaded hole, when the second traction rope is cut off, the clamping mechanism will be clamped into the clamping hole to limit the fixing screw;

[0008] A high-temperature silicone plate is fixedly connected to the upper end of the modular base, and the upper end of the high-temperature silicone plate is clamped in the annular mounting groove. A drying mechanism is provided in the modular base, and a drying air guide mechanism is provided inside the film drying tube. When the modular base and the film drying tube are installed together, the warm air produced by the drying mechanism enters the drying air guide mechanism, and the drying air guide mechanism delivers the warm air to the surface of the plastic film in the film drying tube.

[0009] Preferably, the clamping mechanism includes two groups of clamping rollers, the clamping rollers are movably connected to the lower end of the T-shaped plate, the T-shaped plate is slidably connected to the first limiting cavity, the first limiting cavity is opened in the thin film drying tube, the end of the T-shaped plate away from the clamping rollers is fixedly connected to a plurality of groups of first springs, and the end of the first spring away from the T-shaped plate is fixedly connected to the first limiting cavity.

[0010] Preferably, the liquid pushing mechanism includes an annular blocking cover, which is slidably connected in the annular cavity, and a pressure plate is slidably connected to the inner side of the annular blocking cover, and a plurality of groups of second springs are fixedly connected to the upper end of the pressure plate, and the other end of the second spring is fixedly connected to the annular cavity, and one end of the first traction rope away from the square cavity is fixedly connected to the upper end of the pressure plate, and a plurality of groups of liquid guide holes are opened on the outer side of the annular blocking cover.

[0011] Preferably, the clamping mechanism includes a T-shaped clamping rod, which is slidably connected to the second limiting cavity. The second limiting cavity is opened in the thin film drying tube, and the second limiting cavity is communicated with the internal threaded hole. A connecting spring is fixedly connected in the second limiting cavity, one end of the connecting spring is fixedly connected to the T-shaped clamping rod, and the other end is fixedly connected to the second limiting cavity. The end of the T-shaped clamping rod away from the internal threaded hole is fixedly connected to the second traction rope.

[0012] Preferably, the drying mechanism includes a connecting cavity, which is opened in the lower end of the modular base, and a fan is fixedly installed in the connecting cavity. A heating pipe is provided on the upper side of the fan, and the heating pipe is fixedly installed in the connecting cavity. Two groups of guide grooves are opened in the upper end of the modular base, and two groups of connecting holes are opened in the upper end of the connecting cavity, and the connecting holes are connected to the external environment.

[0013] Preferably, the drying air guide mechanism includes two groups of air guide boxes, a plurality of groups of air guide holes are opened in the outer side of the air guide boxes, the two groups of air guide boxes are respectively installed on the upper and lower sides of the inner side of the thin film drying tube, two groups of air guide grooves are opened in the lower end of the thin film drying tube, the upper ends of the two groups of air guide grooves are connected to the corresponding air guide boxes, exhaust grooves are opened on both sides of the thin film drying tube, the lower ends of the exhaust grooves are connected to the exhaust cavity, the exhaust cavity is opened in the thin film drying tube, and the lower end of the exhaust cavity is connected to the external environment.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: by dividing the oven into two parts, namely, a thin film drying tube and a modular base, the oven is more convenient to transport; at the same time, when the thin film drying tube and the modular base are spliced ​​and installed, the high-temperature silicone plate will be plugged into the annular installation groove; when the installation is completed, the liquid pushing mechanism will push the sealant into the gap between the annular installation groove and the high-temperature silicone plate, thereby sealing the thin film drying tube and the modular base, reducing the installation time and facilitating on-site construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional structural schematic diagram of the film drying tube and the modular base in the installation state of the present invention;

[0016] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the thin film drying tube of the present invention;

[0018] Figure 4 For the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0019] Figure 5It is a schematic cross-sectional structure diagram of a modular base of the present invention;

[0020] Figure 6 It is a schematic diagram of a three-dimensional cross-sectional structure of the T-shaped plate and the film drying tube in a separated state according to the present invention;

[0021] Figure 7 It is a three-dimensional cross-sectional structural schematic diagram of the connection relationship between the annular blocking cover and the pressing plate of the present invention;

[0022] Figure 8 It is a schematic diagram of the side cross-sectional structure of the film hose of the present invention.

[0023] In the figure: 1. film drying tube; 2. first limiting cavity; 3. first spring; 4. pressing roller; 5. T-plate; 6. internal threaded hole; 7. second traction rope; 8. annular cavity; 9. liquid guide hole; 10. air guide groove; 11. annular blocking cover; 12. exhaust cavity; 13. pressing plate; 14. annular mounting groove; 15. square plate; 16. second spring; 17. first traction rope; 18. cutting knife; 19. air guide box; 20. exhaust groove; 21. T-type clamping rod; 22. connecting hole; 23. clamping hole; 24. fixing screw; 25. high-temperature silicone plate; 26. second limiting cavity; 27. guiding groove; 28. modular base; 29. ​​fan; 30. heating tube; 31. connecting cavity; 32. square cavity; 33. connecting spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-8 , the present invention provides a technical solution:

[0026] Embodiment 1:

[0027] A modular oven for producing biaxially stretched plastic film, comprising a modular base 28 and a film drying tube 1, wherein clamping mechanisms are arranged on both sides of the film drying tube 1, and the plastic film is clamped by two sets of clamping mechanisms so that the plastic film is suspended in the film drying tube 1, and a plurality of sets of internal threaded holes 6 are arranged in the lower end of the film drying tube 1, and the upper ends of the internal threaded holes 6 are connected to a square cavity 32, and the square cavity 32 is arranged in the film drying tube 1, and a square plate 15 is slidably connected in the square cavity 32, and a cutter 18 is fixedly connected to the upper end of the square plate 15, and the arrangement of the square cavity 32 and the square plate 15 ensures that the cutter 18 will not deviate when the square plate 15 moves , resulting in the cutter 18 being unable to cut the first traction rope 17 and the second traction rope 7. The first traction rope 17 and the second traction rope 7 are respectively arranged on the upper side of the cutter 18. One end of the first traction rope 17 is fixedly connected to the square cavity 32, and the other end extends into the annular cavity 8 and is connected to the liquid pushing mechanism. The annular cavity 8 is opened in the thin film drying tube 1. The annular cavity 8 is provided with a sealant. The annular cavity 8 is connected with the annular mounting groove 14. The annular mounting groove 14 is opened in the lower end of the thin film drying tube 1. When several groups of first traction ropes 17 are cut, the liquid pushing mechanism is canceled and moves downward to push the sealant from the annular cavity 8 into the annular mounting groove 14.

[0028] One end of the second traction rope 7 is fixedly connected to the square cavity 32, and the other end is fixedly connected to the clamping mechanism, which is arranged in the film drying tube 1. A plurality of sets of fixing screws 24 are arranged in the upper end of the modular base 28, and a clamping hole 23 is opened in the outer side of the fixing screw 24. The fixing screw 24 is screwed in the internal threaded hole 6. With the continuous rotation of the fixing screw 24, the square plate 15 located in the square cavity 32 will be driven to move upward, and the movement of the square plate 15 drives the cutter 18 to move. When the upper end of the cutter 18 contacts the upper end of the square cavity 32, the first traction rope 17 and the second traction rope 7 will be cut off. At the same time, the film drying tube 1 is also fixed with the modular base 28 by a plurality of sets of fixing screws 24. After the second traction rope 7 is cut off, the clamping mechanism will be clamped into the clamping hole 23, so that the fixing screw 24 is limited, so as to prevent the fixing screw 24 from loosening due to the vibration generated during the operation of the equipment.

[0029] A high-temperature silicone plate 25 is fixedly connected to the upper end of the modular base 28, and the upper end of the high-temperature silicone plate 25 is snap-fitted into the annular mounting groove 14. The modular base 28 is first hoisted into the installation area. After the hoisting is completed, the film drying tube 1 is hoisted to the upper end of the modular base 28. During the hoisting process, ensure that the upper end of the high-temperature silicone plate 25 can be inserted into the annular mounting groove 14. The sealant in the annular cavity 8 will be pushed into the annular mounting groove 14 through the liquid guide hole 9, and the annular mounting groove 14 and the high-temperature silicone plate 25 are sealed to ensure airtightness and avoid heat loss. A drying mechanism is provided in the modular base 28, and a drying air guide mechanism is provided on the inner side of the film drying tube 1. When the modular base 28 and the film drying tube 1 are installed together, the warm air produced by the drying mechanism enters the drying air guide mechanism, and the drying air guide mechanism delivers the warm air to the surface of the plastic film in the film drying tube 1.

[0030] Embodiment 2:

[0031] On the basis of Example 1, in order to make the plastic film suspended in the film drying tube 1, the clamping mechanism includes two groups of pressing rollers 4, the pressing rollers 4 are movably connected to the lower end of the T-plate 5, the T-plate 5 is slidably connected to the first limiting cavity 2, the first limiting cavity 2 is opened in the film drying tube 1, the end of the T-plate 5 away from the pressing roller 4 is fixedly connected to a plurality of groups of first springs 3, and the end of the first spring 3 away from the T-plate 5 is fixedly connected to the first limiting cavity 2, the plastic film in the biaxial stretching device is passed through the film drying tube 1 and is arranged between the pressing rollers 4 arranged above and below, so that the plastic film is in a suspended state in the film drying tube 1, and is slidably connected to the first limiting cavity 2 through the T-plate 5, so that when the T-plate 5 moves along the first limiting cavity 2, the two ends of the pressing roller 4 can always be in contact with the inner side of the film drying tube 1, ensuring that the air can be discharged through the plurality of exhaust slots 20, while preventing external objects from entering the film drying tube 1;

[0032] The liquid pushing mechanism includes an annular blocking cover 11, which is slidably connected to the annular cavity 8. A pressure plate 13 is slidably connected to the inner side of the annular blocking cover 11. A plurality of groups of second springs 16 are fixedly connected to the upper end of the pressure plate 13. The other end of the second spring 16 is fixedly connected to the annular cavity 8. The first traction rope 17 is fixedly connected to the upper end of the pressure plate 13 at one end away from the square cavity 32. A plurality of groups of liquid guide holes 9 are opened inside the outer side of the annular blocking cover 11. When the first traction rope 17 is cut off, the pressure plate 13 is freed from limit. Under the elastic force of the second spring 16, the pressure plate 13 will move downward. At the same time, the annular blocking cover 11 will also move downward under the action of its own gravity, so that the liquid guide hole 9 is connected to the annular mounting groove 14. At this time, during the downward movement of the pressure plate 13, the sealant in the annular cavity 8 will be pushed into the annular mounting groove 14 through the liquid guide hole 9, so as to seal the annular mounting groove 14 and the high-temperature silicone plate 25.

[0033] The clamping mechanism includes a T-shaped clamping rod 21, which is slidably connected to the second limiting cavity 26. The second limiting cavity 26 is opened in the film drying tube 1, and the second limiting cavity 26 is communicated with the internal threaded hole 6. A connecting spring 33 is fixedly connected in the second limiting cavity 26. One end of the connecting spring 33 is fixedly connected to the T-shaped clamping rod 21, and the other end is fixedly connected to the second limiting cavity 26. The end of the T-shaped clamping rod 21 away from the internal threaded hole 6 is fixedly connected to the second traction rope 7. After the second traction rope 7 is cut off, the T-shaped clamping rod 21 is clamped into the clamping hole 23 under the elastic force of the connecting spring 33, so that the fixing screw 24 is limited, so as to prevent the fixing screw 24 from loosening due to the vibration generated during the operation of the equipment;

[0034] The drying mechanism includes a connecting cavity 31, which is opened in the lower end of the modular base 28. A fan 29 is fixedly installed in the connecting cavity 31. A heating pipe 30 is arranged on the upper side of the fan 29. The heating pipe 30 is fixedly installed in the connecting cavity 31. The specific model of the heating pipe 30 is HB-5 produced by Zhongneng Huabang Environmental Protection Technology Co., Ltd. Two groups of guide grooves 27 are opened in the upper end of the modular base 28, and two groups of connecting holes 22 are opened in the upper end of the connecting cavity 31. The connecting holes 22 are connected to the external environment. , turn on the fan 29 and the heating tube 30, the fan 29 draws air from the external environment into the connecting cavity 31, the air entering the connecting cavity 31 will be heated after contacting the heating tube 30, the heated gas enters the corresponding air guide groove 10 through the two groups of connecting holes 22, the hot air flow entering the air guide groove 10 enters the corresponding air guide box 19, and finally blows into the surface of the plastic film through the several groups of air guide holes opened on the outside of the air guide box 19, so as to heat the surface of the plastic film;

[0035] The drying air guide mechanism includes two groups of air guide boxes 19, and a plurality of groups of air guide holes are opened in the outer side of the air guide boxes 19. The two groups of air guide boxes 19 are respectively installed on the upper and lower sides of the inner side of the thin film drying tube 1. Two groups of air guide grooves 10 are opened in the lower end of the thin film drying tube 1. The upper ends of the two groups of air guide grooves 10 are connected to the corresponding air guide boxes 19. Exhaust grooves 20 are opened on both sides of the thin film drying tube 1. The lower ends of the exhaust grooves 20 are connected to the exhaust cavity 12. The exhaust cavity 12 is opened in the thin film drying tube 1, and the lower end of the exhaust cavity 12 is connected to the external environment. Filter plates are fixedly installed on the lower sides of the guide grooves 27 and the connecting cavity 31 to prevent debris in the external environment from entering the guide grooves 27 or the connecting cavity 31.

[0036] Working principle: when in use, the thin film drying tube 1 and the modular base 28 are transported to the installation area by means of transportation equipment. After the transportation is completed, the thin film drying tube 1 and the modular base 28 can be assembled together. Specifically, the modular base 28 is first hoisted into the installation area. After the hoisting is completed, the thin film drying tube 1 is hoisted to the upper end of the modular base 28. During the hoisting process, ensure that the upper end of the high-temperature silicone plate 25 can be inserted into the annular installation groove 14. When the lower end of the thin film drying tube 1 contacts the upper end of the modular base 28, the fixing screw 24 is screwed into the corresponding internal threaded hole 6 in turn. When the upper end of the fixing screw 24 enters the square cavity 32, at this time, as the fixing screw 24 is fixed, The fixed screw 24 rotates continuously, and the square plate 15 in the square cavity 32 is driven to move upward. The movement of the square plate 15 drives the cutter 18 to move. When the upper end of the cutter 18 contacts the upper end of the square cavity 32, the first traction rope 17 and the second traction rope 7 are cut off. At the same time, the film drying tube 1 is also fixed with the modular base 28 by a plurality of sets of fixed screws 24. After the second traction rope 7 is cut off, the T-shaped clamping rod 21 is clamped into the clamping hole 23 under the elastic force of the connecting spring 33, so that the fixed screw 24 is limited to prevent the fixed screw 24 from loosening due to the vibration generated during the operation of the equipment.

[0037] When the first traction rope 17 is cut off, the limit of the pressing plate 13 is cancelled. Under the elastic force of the second spring 16, the pressing plate 13 will move downward. At the same time, the annular blocking cover 11 will also move downward under its own gravity, so that the liquid guide hole 9 is connected with the annular mounting groove 14. At this time, during the downward movement of the pressing plate 13, the sealant in the annular cavity 8 will be pushed into the annular mounting groove 14 through the liquid guide hole 9, and the annular mounting groove 14 and the high-temperature silicone plate 25 are sealed and blocked, ensuring the sealing without air leakage and avoiding heat loss.

[0038] The plastic film in the biaxial stretching device is passed through the film drying tube 1 and arranged between the upper and lower pressing rollers 4, and the fan 29 and the heating tube 30 are turned on. The fan 29 draws air from the external environment into the connecting cavity 31. The air entering the connecting cavity 31 will be heated after contacting the heating tube 30, and the heated gas enters the corresponding air guide groove 10 through the two groups of connecting holes 22. The hot air flow entering the air guide groove 10 enters the corresponding air guide box 19, and is finally blown into the surface of the plastic film through several groups of air guide holes opened on the outside of the air guide box 19 to heat the surface of the plastic film. The gas passes through several groups of exhaust grooves 20 and then enters the exhaust cavity 12, and is finally discharged into the external environment through the guide groove 27.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular oven for producing biaxially oriented plastic film, comprising a modular base and a film drying tube, characterized in that: Clamping mechanisms are provided on both sides of the film drying tube, and the plastic film is clamped by two groups of clamping mechanisms so that the plastic film is suspended in the film drying tube. Several groups of internal threaded holes are provided in the lower end of the film drying tube, and the upper ends of the internal threaded holes are connected with the square cavity. The square cavity is provided in the film drying tube, and a square plate is slidably connected in the square cavity. A cutter is fixedly connected to the upper end of the square plate, and a first traction rope and a second traction rope are respectively provided on the upper side of the cutter. One end of the first traction rope is fixedly connected to the square cavity, and the other end extends into the annular cavity and is connected to the liquid pushing mechanism. The annular cavity is provided in the film drying tube, and the annular cavity is connected with the annular mounting groove. The annular mounting groove is provided in the lower end of the film drying tube. When several groups of first traction ropes are cut off, the liquid pushing mechanism is freed from the limit and moves downward to push the sealant from the annular cavity into the annular mounting groove. One end of the second traction rope is fixedly connected to the square cavity, and the other end is fixedly connected to the clamping mechanism, the clamping mechanism is arranged in the film drying tube, a plurality of sets of fixing screws are arranged in the upper end of the modular base, a clamping hole is opened in the outer side of the fixing screw, the fixing screw is screwed in the internal threaded hole, when the second traction rope is cut off, the clamping mechanism will be clamped into the clamping hole to limit the fixing screw; A high-temperature silicone plate is fixedly connected to the upper end of the modular base, and the upper end of the high-temperature silicone plate is clamped in the annular mounting groove. A drying mechanism is provided in the modular base, and a drying air guide mechanism is provided on the inner side of the film drying tube. When the modular base and the film drying tube are installed together, the warm air generated by the drying mechanism enters the drying air guide mechanism, and the drying air guide mechanism delivers the warm air to the surface of the plastic film in the film drying tube.

2. A modular oven for producing biaxially oriented plastic film according to claim 1, characterized in that: The clamping mechanism includes two groups of clamping rollers, the clamping rollers are movably connected to the lower end of the T-shaped plate, the T-shaped plate is slidably connected to the first limiting cavity, the first limiting cavity is opened in the film drying tube, the end of the T-shaped plate away from the clamping rollers is fixedly connected to a plurality of groups of first springs, and the end of the first spring away from the T-shaped plate is fixedly connected to the first limiting cavity.

3. The modular oven for producing biaxially oriented plastic film according to claim 1, characterized in that: The liquid pushing mechanism includes an annular blocking cover, which is slidably connected in the annular cavity. A pressure plate is slidably connected to the inner side of the annular blocking cover. A plurality of groups of second springs are fixedly connected to the upper end of the pressure plate. The other end of the second spring is fixedly connected to the annular cavity. The first traction rope is fixedly connected to the upper end of the pressure plate at one end away from the square cavity. A plurality of groups of liquid guide holes are opened on the outer side of the annular blocking cover.

4. The modular oven for producing biaxially oriented plastic film according to claim 1, characterized in that: The clamping mechanism includes a T-shaped clamping rod, which is slidably connected to the second limiting cavity. The second limiting cavity is opened in the thin film drying tube, and the second limiting cavity is connected to the internal threaded hole. A connecting spring is fixedly connected in the second limiting cavity, one end of the connecting spring is fixedly connected to the T-shaped clamping rod, and the other end is fixedly connected to the second limiting cavity. The end of the T-shaped clamping rod away from the internal threaded hole is fixedly connected to the second traction rope.

5. The modular oven for producing biaxially oriented plastic film according to claim 1, characterized in that: The drying mechanism includes a connecting cavity, which is opened in the lower end of the modular base, and a fan is fixedly installed in the connecting cavity. A heating pipe is provided on the upper side of the fan, and the heating pipe is fixedly installed in the connecting cavity. Two groups of guide grooves are opened in the upper end of the modular base, and two groups of connecting holes are opened in the upper end of the connecting cavity, and the connecting holes are connected to the external environment.

6. The modular oven for producing biaxially oriented plastic film according to claim 1, characterized in that: The drying air guide mechanism includes two groups of air guide boxes, a plurality of groups of air guide holes are opened in the outer side of the air guide boxes, the two groups of air guide boxes are respectively installed on the upper and lower sides of the inner side of the film drying tube, two groups of air guide grooves are opened in the lower end of the film drying tube, the upper ends of the two groups of air guide grooves are connected to the corresponding air guide boxes, exhaust grooves are opened on both sides of the film drying tube, the lower ends of the exhaust grooves are connected to the exhaust cavity, the exhaust cavity is opened in the film drying tube, and the lower end of the exhaust cavity is connected to the external environment.

Images