A polylactic acid breathable film production equipment

Abstract

The present invention relates to the technical field of polylactic acid breathable film production, and specifically to a polylactic acid breathable film production device, comprising a first extrusion molding body, a first auxiliary extrusion molding body, a second extrusion molding body, a second auxiliary extrusion molding body, a third extrusion molding body, a support fixing frame, a trimming and testing body, and a protective molding body, wherein the first extrusion molding body, the second extrusion molding body, and the third extrusion molding body are evenly arranged. The present invention can quickly prepare a film body of a specified width, and the prepared film body has good quality, and the air permeability performance test of the film is automatically completed during the preparation process.

Description

Technical Field

[0001] The invention relates to the technical field of polylactic acid breathable film production, in particular to polylactic acid breathable film production equipment. Background Art

[0002] Lactic acid breathable film, also known as polylactic acid (PLA) breathable film, is a new type of biodegradable material formed by polymerization of lactic acid. In the prior art, in the process of preparing the lactic acid breathable film, a casting device such as an extruder is used to make a molten mixture into a film, and an extrusion roller is used to extrude the film to obtain the desired thickness and performance, and the extruded lactic acid breathable film is cooled and formed and then rolled up.

[0003] However, the existing polylactic acid breathable film production equipment cannot rapidly stretch the extruded film body in the transverse direction through the continuous extrusion rollers during use, and the film body extruded into a specified thickness and width requires continuous extrusion by continuously longer extrusion rollers. During the continuous extrusion process, the extrusion stroke increases and the temperature of the extrusion rollers is low, so that the film body cools rapidly during the extrusion process, so that the extrusion molding is not in place and the specified thickness cannot be achieved, resulting in poor quality of the extruded film body. Moreover, the rapid cooling after extrusion molding and the excessive temperature drop make the cooled film body prone to cracks, resulting in poor quality of the prepared polylactic acid breathable film. In addition, the trimming process cannot be automatically completed during the preparation process, and the air permeability cannot be intuitively and accurately detected during the preparation process of the polylactic acid breathable film. The detection is inconvenient, resulting in a high rate of inferior products of the prepared polylactic acid breathable film. Therefore, a device is needed to solve the above-mentioned problems. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a polylactic acid breathable film production device.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a polylactic acid breathable film production equipment, including a first extrusion molding body, a first auxiliary extrusion molding body, a second extrusion molding body, a second auxiliary extrusion molding body, a third extrusion molding body, a support fixing frame, a trimming and detection body and a protective molding body, the first extrusion molding body, the second extrusion molding body and the third extrusion molding body are evenly arranged, and the first auxiliary extrusion molding body and the second auxiliary extrusion molding body are respectively arranged between the first extrusion molding body and the second extrusion molding body and the third extrusion molding body, and the first extrusion molding body, the second extrusion molding body and the third extrusion molding body have the same structure, the first auxiliary extrusion molding body and the second auxiliary extrusion molding body have the same structure, and the protective molding body is arranged on the third extrusion molding body The body is away from the side end of the second auxiliary extrusion molding body, the supporting fixing frame is evenly fixedly connected to the bottom end of the protective molding body, the trimming detection body is arranged at one end of the protective molding body away from the third extrusion molding body, the first extrusion molding body, the second extrusion molding body and the third extrusion molding body all include a first extrusion part, a fixed connecting plate, a first electric push rod, a fixed support plate, a second extrusion part and a temperature detection part, the first extrusion part and the second extrusion part are arranged in mirror symmetry, the fixed connecting plate is fixedly connected to the end of the first extrusion part, the fixed support plate is fixedly connected to the end of the second extrusion part, the first electric push rod is fixedly installed on the fixed support plate, and the upper end of the first electric push rod is fixedly connected to the fixed connecting plate, and the two temperature detection parts are respectively arranged at the side ends of the first extrusion part and the second extrusion part.

[0006] Preferably, the first extrusion part and the second extrusion part each include a first synchronous belt, a first synchronous wheel, an extrusion forming roller, an adaptive sliding adjustment frame, a limit outer frame, an auxiliary spring, a second electric push rod, an adjustment plate, a heating nozzle, an electromagnetic valve, a delivery hose and a first motor, the second electric push rod is fixedly connected to the bottom of the end angle of the limit outer frame, the adjustment plate is arranged below the limit outer frame, and the bottom end of the second electric push rod is fixedly connected to the upper end angle of the adjustment plate, the adaptive sliding adjustment frame is slidably clamped inside the limit outer frame, the extrusion forming roller is evenly rotatably installed inside the adaptive sliding adjustment frame, and the first synchronous wheel is fixedly connected to the bottom of the end angle of the limit outer frame. The first synchronous belt is rotatably arranged between the two ends of the extrusion forming roller, the first synchronous belt is fixedly installed on the side end of the adaptive sliding adjustment frame through an auxiliary mounting frame, and the driving end of the first motor is fixedly connected to the middle part of the outer end of one of the first synchronous wheels, the auxiliary spring is evenly clamped and installed between the bottom ends of both sides of the adaptive sliding adjustment frame and the side ends of the adjustment plate, the solenoid valve is symmetrically fixedly installed at the bottom end of the adjustment plate, the conveying hose is fixedly connected to the solenoid valve, the heating nozzle is evenly fixedly installed inside the adjustment plate, and the heating nozzle is located directly below the extrusion forming roller.

[0007] Preferably, the temperature detection part includes a driving gear, a first temperature sensor, a support limit frame, a second motor and a sliding tooth plate, the sliding tooth plate is slidably clamped on the support limit frame, the driving gear is rotatably clamped in the middle part of the support limit frame, the second motor is fixedly mounted on the support limit frame, and the second motor is fixedly connected to the middle part of the side end of the driving gear through a reducer, and the first temperature sensor is evenly fixedly mounted on the front end of the sliding tooth plate.

[0008] Preferably, the first auxiliary extrusion molding body includes a third electric push rod, a fixed limit plate, an auxiliary extrusion plate, a sliding adjustment plate, a rotating limit plate, a fourth electric push rod, a third motor, an auxiliary support plate, a transverse molding roller and a conveying support platform, the fixed limit plate is arranged directly above the conveying support platform, the third electric push rod is fixedly installed in the middle of the fixed limit plate, and the front end of the third electric push rod penetrates and is inserted in the middle of the fixed limit plate, the auxiliary extrusion plate is arranged at the bottom of the fixed limit plate, and the bottom end of the third electric push rod is fixedly connected to the middle of the upper end of the auxiliary extrusion plate The auxiliary support plate is fixedly connected to the side end of the conveying support platform, the middle parts of both sides of the rotation limit plate are rotatably clamped on the auxiliary support plate, the third motor is fixedly mounted on the auxiliary support plate, and the front end of the third motor is fixedly connected to the middle part of the side end of the rotation limit plate through a reducer, the sliding adjustment plate is slidably clamped on the rotation limit plate, the transverse forming roller is symmetrically rotationally clamped inside the end head of the sliding adjustment plate, the fourth electric push rod is fixedly mounted on the inner side of the rotation limit plate, and the front end of the fourth electric push rod is fixedly connected to the sliding adjustment plate.

[0009] Preferably, the protective molding body includes a fifth electric push rod, a fixed frame, a second synchronous wheel, a conveyor roller, a second synchronous belt, a fourth motor, a second temperature sensor, a dryer, a sixth electric push rod, a sliding adjustment frame and a movable adjustment frame, the fixed frame is arranged directly below the movable adjustment frame, the fifth electric push rod is evenly fixedly connected to the side end of the fixed frame, the upper end of the fifth electric push rod is fixedly connected to the side end of the movable adjustment frame, the sliding adjustment frame is evenly slidably connected to the movable adjustment frame, the sixth electric push rod is distributed on both sides of the sliding adjustment frame, and the sixth electric push rod is fixedly installed on the movable adjustment frame. The upper end of the push rod is fixedly connected to the sliding adjustment frame, the dryer is evenly fixedly installed in the middle of the sliding adjustment frame, the conveying roller is evenly rotatably clamped inside the fixed frame, the second synchronous wheel is fixedly connected to the end of the conveying roller, and the second synchronous wheel is rotatably set on the fixed frame, the second synchronous belt is rotatably set between adjacent second synchronous wheels, the fourth motor is fixedly installed on the fixed frame, and the driving end of the fourth motor is fixedly connected to the middle of the outer end of a second synchronous wheel through a reducer, the second temperature sensor is evenly arranged in the middle of the fixed frame, and the conveying roller is located directly below the dryer.

[0010] Preferably, the trimming and detecting body comprises a detecting part, a trimming part and a supporting and forming part, the two detecting parts are arranged above the middle part of the supporting and forming part, the trimming part is distributed at the side end of the supporting and forming part, the supporting and forming part comprises a movable card plate, a seventh electric push rod, a limit support bracket, a first L-shaped fixing frame, an eighth electric push rod, a first clamping and dragging plate, a blower, a cutting groove, a detection blowing groove, a conveying bracket, a second L-shaped fixing frame, a second clamping and dragging plate and a ninth electric push rod, the two limit support brackets are respectively fixedly connected to the side ends of the conveying bracket, the cutting grooves are evenly arranged at the upper parts of both sides of the conveying bracket, the detection blowing grooves are symmetrically penetrated and arranged in the middle part of the conveying bracket, the seventh electric push rod is fixedly installed on the limit support bracket, the movable card plate is slidably clamped on the limit support bracket, and the seventh electric push rod The front end of the rod is fixedly connected to the middle part of the outer end of the moving pallet, the first L-shaped fixing frame is fixedly installed on the upper end of the moving pallet, the eighth electric push rod is symmetrically fixedly installed on the first L-shaped fixing frame, the first clamping and dragging plate is fixedly connected to the bottom end of the eighth electric push rod, the second L-shaped fixing frame is fixedly connected to the bottom end of the moving pallet, the ninth electric push rod is symmetrically fixedly installed on the second L-shaped fixing frame, the second clamping and dragging plate is fixedly connected to the upper end of the ninth electric push rod, and the side end of the conveying bracket is located between the first clamping and dragging plate and the second clamping and dragging plate, and the inner ends of the first clamping and dragging plate and the second clamping and dragging plate are fixedly installed with rubber anti-slip pads, the blower is symmetrically fixedly installed on the bottom end of the conveying bracket, and the blower is located at the bottom of the detection blowing slot.

[0011] Preferably, the trimming part includes a tenth electric push rod, a sliding support frame, a protective mounting cover, an eleventh electric push rod, a third synchronous wheel, a third synchronous belt, a fifth motor and a cutting disc, the tenth electric push rod is evenly fixedly mounted on the sliding support frame, the protective mounting cover is arranged below the sliding support frame, and the bottom end of the tenth electric push rod is fixedly connected to the upper end of the protective mounting cover, the eleventh electric push rod is distributed on the inner side of the end head of the sliding support frame, and the driving end of the eleventh electric push rod is fixedly connected to the inner side of the end head of the sliding support frame, the cutting disc is evenly rotatably mounted on the inside of the protective mounting cover, the third synchronous wheel is fixedly connected to the middle part of the side end of the cutting disc, and the third synchronous wheel is rotatably clamped on the protective mounting cover, the third synchronous belt is rotatably arranged between the third synchronous wheels, the fifth motor is fixedly mounted on the protective mounting cover, and the driving end of the fifth motor is fixedly connected to the middle part of the outer end of one of the third synchronous wheels.

[0012] Preferably, the detection part includes a supporting cross frame, an alarm, a detection mounting plate, a limiting vertical plate, a detection foam board, a pulling rope, a laser distance sensor and a gas flow sensor, the supporting cross frame is fixedly connected to the middle of the side end of the detection mounting plate, the alarm is fixedly installed in the middle of the upper end of the detection mounting plate, the pulling rope is fixedly connected to the bottom of the four end corners of the detection mounting plate, the detection foam board is fixedly connected to the bottom end of the pulling rope, the limiting vertical plate is symmetrically fixedly connected to the bottom ends of both sides of the detection mounting plate, the laser distance sensor is fixedly installed in the middle of the bottom end of the detection mounting plate, the gas flow sensor is fixedly installed in the middle of the bottom end of the detection foam board, and the detection foam board is located directly above the detection blowing slot.

[0013] Preferably, both ends of the sliding support frame are slidably connected to the limit support bracket, and the eleventh electric push rod is fixedly installed on the bottom end of the conveying bracket, the conveying bracket is fixedly connected to the end of the fixed frame, the support fixing frame is fixedly connected to the bottom end of the fixed frame, the conveying support platform and the fixed limit plate are fixedly connected to the limit outer frames in the second extrusion part and the first extrusion part respectively, the fixed connecting plate and the fixed support plate are fixedly connected to the limit outer frames in the first extrusion part and the second extrusion part respectively, and the front end of the support limit frame is fixedly connected to the outer end of the limit outer frame.

[0014] Beneficial effects of the present invention:

[0015] 1. The present invention can control the distance between the first extrusion part and the second extrusion part in the first extrusion molding body, the second extrusion molding body, and the third extrusion molding body, as well as the distance between the fixed limit plate and the conveying support platform, so that the material discharged from the extruder is extruded and conveyed by the extrusion molding rollers evenly distributed between the first extrusion part and the second extrusion part, so that the material is continuously extruded and molded. The first extrusion molding body, the second extrusion molding body, and the third extrusion molding body can extrude the material longitudinally, and the first auxiliary extrusion molding body and the second auxiliary extrusion molding body distributed between the first extrusion molding body, the second extrusion molding body, and the third extrusion molding body can realize transverse extrusion molding of the material, so that the material can be quickly extruded into a specified thickness, and the polylactic acid after molding is transparent. The width of the air film meets the requirements. After the material body is hot-extruded and conveyed between each first extrusion part and the second extrusion part for longitudinal forming, it can quickly complete the transverse extrusion forming through the first auxiliary extrusion forming body and the second auxiliary extrusion forming body, so that the width of the prepared polylactic acid breathable film can fully meet the preparation requirements, so that rapid transverse forming can be achieved during the shorter extrusion longitudinal forming, so that the length and width of the finally formed polylactic acid breathable film meet the requirements. Therefore, at the set temperature, the polylactic acid preparation material of this equipment can flow better and be fully extruded, reducing the generation of defects such as bubbles and wrinkles. In addition, since the hot extrusion forming is carried out at the set temperature, the residual stress inside the material can be eliminated, the dimensional stability and mechanical properties of the product can be improved, and the film body can be quickly formed in the transverse and longitudinal directions.

[0016] 2. The present invention enters the interior of the protective molding body and performs a step-by-step cooling and molding process. During the entire cooling process, the temperature of the cooling area gradually decreases, and it will not be directly and quickly cooled and molded. The gradual cooling allows the material to release internal stress more evenly during the molding process, thereby reducing defects and stress concentration inside the material. This uniform gradual cooling molding process helps to improve the physical properties of the polylactic acid breathable film, such as tensile strength, elongation at break and elastic modulus. Rapid cooling may cause uneven stress inside the material, thereby causing deformation and shrinkage. Gradual cooling can reduce this stress difference and reduce the occurrence of deformation and shrinkage. The molded polylactic acid breathable film will not produce fine cracks due to rapid cooling, which helps to maintain the transparency and glossiness of the polylactic acid breathable film and ensure the quality of the polylactic acid breathable film.

[0017] The trimming parts symmetrically arranged in the present invention can quickly trim the two sides of the formed film body, and in the process of cutting and trimming the two sides of the film body, the seventh electric push rod drives the moving card plate to slide back and forth along the limit support bracket, and when the moving card plate slides to the top along the limit support bracket, the eighth electric push rod and the ninth electric push rod respectively drive the first clamping and dragging plate and the second clamping and dragging plate to approach each other, and the films cut on both sides of the film body are clamped and pulled out by the first clamping and dragging plate and the second clamping and dragging plate, so that the cut and trimmed film can be discharged from the conveying bracket, so that the cutting and trimming of the cutting knife disc can be carried out continuously and conveniently, and the film body clamped and pulled out by the first clamping and dragging plate and the second clamping and dragging plate can be recycled and processed in time, so that the two sides of the film body discharged from the conveying bracket are flat, and the film body passes through the detection blowing slot during the conveying process, and the blown air body can make the film The body is separated by the cut parts on both sides, and the air permeability of the membrane can be detected. After the gas passes through the membrane, it will blow the detection foam board to rise, and the detection foam board rises to a specified height under the limit of the limit vertical plate. At this time, the lifting rope is bent, and the change in the height of the detection foam board is detected by the laser distance sensor to judge the air permeability of the membrane. When the air permeability does not meet the requirements, the height of the detection foam board is lower than the detection set range, and the alarm is sounded at this time. The pre-set value is obtained by multiple tests under the same conditions using membranes that meet the requirements, and the gas flow sensor arranged at the bottom of the detection foam board can detect the gas flow on the upper end face of the membrane, so that the two detection methods are carried out simultaneously, so that the results of the membrane detection are accurate and can be observed intuitively, so that the air permeability of the prepared membrane meets the requirements. Therefore, this equipment can complete the air permeability and trimming of the membrane synchronously and collaboratively. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the main body of the present invention from the front perspective;

[0020] Figure 2 It is a schematic diagram of the side-view stereoscopic structure of the main body in the present invention;

[0021] Figure 3 It is a schematic diagram of the first extrusion molding main structure in the present invention;

[0022] Figure 4 It is a schematic diagram of a side view of a three-dimensional structure of a first extrusion-molded body in the present invention;

[0023] Figure 5 It is a schematic structural diagram of the second extrusion part in the present invention;

[0024] Figure 6It is a schematic diagram of the structure of the temperature detection part in the present invention;

[0025] Figure 7 This is a schematic diagram of the first auxiliary extrusion molding main structure in the present invention;

[0026] Figure 8 It is a schematic diagram of the protective molding main body structure in the present invention;

[0027] Fig. 9 This is a schematic diagram of the second state structure of the protective molding body in the present invention;

[0028] Fig.10 It is a schematic diagram of the main structure of the trimming and detection in the present invention;

[0029] Fig.11 It is a schematic diagram of the structure of the support forming part in the present invention;

[0030] Fig.12 It is a schematic diagram of the bottom structure of the support forming part in the present invention;

[0031] Fig.13 It is a structural schematic diagram of the trimming part in the present invention;

[0032] Fig.14 It is a schematic diagram of the internal structure of the protective mounting cover in the present invention;

[0033] Fig.15 It is a schematic diagram of the structure of the detection unit in the present invention;

[0034] Fig.16 It is a schematic diagram of the bottom structure of the detection part in the present invention.

[0035] In the figure: 1-first extrusion molding body, 2-first auxiliary extrusion molding body, 3-second extrusion molding body, 4-second auxiliary extrusion molding body, 5-third extrusion molding body, 6-support fixing frame, 7-trim detection body, 8-protective molding body, 9-first extrusion part, 10-fixed connecting plate, 11-first electric push rod, 12-fixed support plate, 13-second extrusion part, 14-temperature detection part, 15-first synchronous belt, 16-first synchronous wheel, 17-extrusion molding roller, 18-adaptive sliding adjustment frame, 19-limiting outer frame, 20 - auxiliary spring, 21- second electric push rod, 22- adjustment plate, 23- heating nozzle, 24- electromagnetic valve, 25- conveying hose, 26- first motor, 27- driving gear, 28- first temperature sensor, 29- support limit frame, 30- second motor, 31- sliding gear plate, 32- third electric push rod, 33- fixed limit plate, 34- auxiliary extrusion plate, 35- sliding adjustment plate, 36- rotating limit plate, 37- fourth electric push rod, 38- third motor, 39- auxiliary support plate, 40- horizontal forming roller, 41- conveying support table, 4 2-fifth electric push rod, 43-fixed frame, 44-second synchronous wheel, 45-conveying roller, 46-second synchronous belt, 47-fourth motor, 48-second temperature sensor, 49-dryer, 50-sixth electric push rod, 51-sliding adjustment frame, 52-moving adjustment frame, 53-detection part, 54-finishing part, 55-support molding part, 56-moving card board, 57-seventh electric push rod, 58-limiting support bracket, 59-first L-shaped fixed frame, 60-eighth electric push rod, 61-first clamping and dragging plate, 62-blower, 63-cutting groove, 64- detection blowing slot, 65- conveying bracket, 66- second L-shaped fixing frame, 67- second clamping and dragging plate, 68- ninth electric push rod, 69- tenth electric push rod, 70- sliding support frame, 71- protective mounting cover, 72- eleventh electric push rod, 73- third synchronous wheel, 74- third synchronous belt, 75- fifth motor, 76- cutting blade, 77- supporting cross frame, 78- alarm, 79- detection mounting plate, 80- limiting vertical plate, 81- detection foam board, 82- pulling rope, 83- laser distance sensor, 84- gas flow sensor. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] The present invention is further described below in conjunction with the accompanying drawings.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a polylactic acid breathable film production device of the present invention comprises a first extrusion molding body 1, a first auxiliary extrusion molding body 2, a second extrusion molding body 3, a second auxiliary extrusion molding body 4, a third extrusion molding body 5, a supporting and fixing frame 6, a trimming and detecting body 7 and a protective type molding body 8, the first extrusion molding body 1, the second extrusion molding body 3 and the third extrusion molding body 5 are evenly arranged, and the first auxiliary extrusion molding body 2 and the second auxiliary extrusion molding body 4 are respectively arranged between the first extrusion molding body 1 and the second extrusion molding body 3 and the second extrusion molding body 3 and the third extrusion molding body 5, and the first extrusion molding body 1, the second extrusion molding body 3 and the third extrusion molding body 5 have the same structure, the first auxiliary extrusion molding body 2 and the second auxiliary extrusion molding body 4 have the same structure, and the protective type molding body 8 is arranged on the third extrusion molding body 5 away from the second auxiliary extrusion molding body 5. At the side end of the auxiliary extrusion molding body 4, the supporting fixing frame 6 is evenly fixedly connected to the bottom end of the protective molding body 8, and the trimming and detecting body 7 is arranged at the end of the protective molding body 8 away from the third extrusion molding body 5. The first extrusion molding body 1, the second extrusion molding body 3 and the third extrusion molding body 5 all include a first extrusion part 9, a fixed connecting plate 10, a first electric push rod 11, a fixed support plate 12, a second extrusion part 13 and a temperature detection part 14. The first extrusion part 9 and the second extrusion part 13 are arranged in a mirror-symmetrical manner. The fixed connecting plate 10 is fixedly connected to the end of the first extrusion part 9, and the fixed support plate 12 is fixedly connected to the end of the second extrusion part 13. The first electric push rod 11 is fixedly installed on the fixed support plate 12, and the upper end of the first electric push rod 11 is fixedly connected to the fixed connecting plate 10. The two temperature detection parts 14 are respectively arranged at the side ends of the first extrusion part 9 and the second extrusion part 13.

[0040] like Figure 5As shown, the first extrusion part 9 and the second extrusion part 13 both include a first synchronous belt 15, a first synchronous wheel 16, an extrusion forming roller 17, an adaptive sliding adjustment frame 18, a limit outer frame 19, an auxiliary spring 20, a second electric push rod 21, an adjustment plate 22, a heating nozzle 23, a solenoid valve 24, a conveying hose 25 and a first motor 26, the second electric push rod 21 is fixedly connected to the bottom of the end angle of the limit outer frame 19, the adjustment plate 22 is arranged below the limit outer frame 19, and the bottom end of the second electric push rod 21 is fixedly connected to the upper end angle of the adjustment plate 22, the adaptive sliding adjustment frame 18 is slidably connected to the inside of the limit outer frame 19, the extrusion forming roller 17 is evenly rotatably installed inside the adaptive sliding adjustment frame 18, the first synchronous wheel 16 is fixedly connected to the two ends of the extrusion forming roller 17, the first synchronous belt 15 is rotatably arranged between adjacent first synchronous wheels 16, and the first motor 26 is installed by auxiliary The frame is fixedly installed on the side end of the adaptive sliding adjustment frame 18, and the driving end of the first motor 26 is fixedly connected to the middle part of the outer end of a first synchronous wheel 16, the auxiliary spring 20 is evenly clamped and installed between the bottom ends of both sides of the adaptive sliding adjustment frame 18 and the side ends of the adjustment plate 22, the solenoid valve 24 is symmetrically fixedly installed on the bottom end of the adjustment plate 22, the delivery hose 25 is fixedly connected to the solenoid valve 24, the heating nozzle 23 is evenly fixedly installed inside the adjustment plate 22, and the heating nozzle 23 is located directly below the extrusion forming roller 17, and the spacing between the extrusion forming rollers 17 in the first extrusion part 9 and the second extrusion part 13 can control the extrusion force to achieve the adjustment of the film thickness, the spacing between the extrusion forming rollers 17 and the degree of extrusion force can be easily adjusted, so that the film after hot pressing can reach the specified thickness, and the extrusion forming roller 17 has a temperature during the extrusion forming process, so that the quality of the hot pressed film is good.

[0041] like Figure 6 As shown, the temperature detection unit 14 includes a driving gear 27, a first temperature sensor 28, a support and limit frame 29, a second motor 30 and a sliding tooth plate 31. The sliding tooth plate 31 is slidably clamped on the support and limit frame 29, the driving gear 27 is rotatably clamped in the middle of the support and limit frame 29, the second motor 30 is fixedly mounted on the support and limit frame 29, and the second motor 30 is fixedly connected to the middle of the side end of the driving gear 27 through a reducer. The first temperature sensor 28 is evenly fixedly mounted on the front end of the sliding tooth plate 31. The first temperature sensor 28 is set to intermittently detect the temperature between the heating nozzle 23 and the extrusion molding roller 17 to achieve hot pressing processing.

[0042] like Figure 7As shown, the first auxiliary extrusion molding body 2 includes a third electric push rod 32, a fixed limit plate 33, an auxiliary extrusion plate 34, a sliding adjustment plate 35, a rotating limit plate 36, a fourth electric push rod 37, a third motor 38, an auxiliary support plate 39, a transverse molding roller 40 and a conveying support platform 41. The fixed limit plate 33 is arranged directly above the conveying support platform 41, the third electric push rod 32 is fixedly installed in the middle of the fixed limit plate 33, and the front end of the third electric push rod 32 is inserted through the middle of the fixed limit plate 33, the auxiliary extrusion plate 34 is arranged at the bottom of the fixed limit plate 33, and the bottom end of the third electric push rod 32 is fixedly connected to the middle of the upper end of the auxiliary extrusion plate 34, and the auxiliary support plate 39 is fixedly installed. The third motor 38 is fixedly connected to the side end of the conveying support platform 41, the middle parts of both sides of the rotating limit plate 36 are rotatably clamped on the auxiliary support plate 39, the third motor 38 is fixedly mounted on the auxiliary support plate 39, and the front end of the third motor 38 is fixedly connected to the middle part of the side end of the rotating limit plate 36 through a reducer, the sliding adjustment plate 35 is slidably clamped on the rotating limit plate 36, the transverse forming roller 40 is symmetrically rotated and clamped inside the end of the sliding adjustment plate 35, the fourth electric push rod 37 is fixedly mounted on the inner side of the rotating limit plate 36, and the front end of the fourth electric push rod 37 is fixedly connected to the sliding adjustment plate 35, and the auxiliary extrusion plate 34 and the transverse forming roller 40 are set to enable the material to be horizontally extruded, stretched and flattened.

[0043] like Figure 8 and Fig. 9As shown, the protective molding body 8 includes a fifth electric push rod 42, a fixed frame 43, a second synchronous wheel 44, a conveying roller 45, a second synchronous belt 46, a fourth motor 47, a second temperature sensor 48, a dryer 49, a sixth electric push rod 50, a sliding adjustment frame 51 and a movable adjustment frame 52. The fixed frame 43 is arranged directly below the movable adjustment frame 52. The fifth electric push rod 42 is evenly fixedly connected to the side end of the fixed frame 43. The upper end of the fifth electric push rod 42 is fixedly connected to the side end of the movable adjustment frame 52. The sliding adjustment frame 51 is evenly slidably connected to the movable adjustment frame 52. The sixth electric push rod 50 is distributed on both sides of the sliding adjustment frame 51, and the sixth electric push rod 50 is fixedly installed on the movable adjustment frame 52. The upper end of the sixth electric push rod 50 is fixedly connected to the sliding adjustment frame 51. The dryer 49 is fixedly installed on the sliding In the middle of the adjustment frame 51, the conveying roller 45 is evenly rotated and clamped inside the fixed frame 43, the second synchronous wheel 44 is fixedly connected to the end of the conveying roller 45, and the second synchronous wheel 44 is rotatably set on the fixed frame 43, the second synchronous belt 46 is rotatably set between adjacent second synchronous wheels 44, the fourth motor 47 is fixedly installed on the fixed frame 43, and the driving end of the fourth motor 47 is fixedly connected to the middle of the outer end of a second synchronous wheel 44 through a reducer, the second temperature sensor 48 is evenly set in the middle of the fixed frame 43, and the conveying roller 45 is located directly below the dryer 49, the length and number of the protective molding body 8 can be specifically adjusted and used, and the cooling temperature of the cooling area can be detected by the set second temperature sensor 48, so that the gradual cooling treatment can be achieved by adaptive adjustment and control.

[0044] like Fig.10 , Fig.11 and Fig.12As shown, the trimming and detecting body 7 includes a detecting part 53, a trimming part 54 and a supporting and forming part 55. The two detecting parts 53 are arranged above the middle part of the supporting and forming part 55, and the trimming part 54 is distributed at the side end of the supporting and forming part 55. The supporting and forming part 55 includes a moving card plate 56, a seventh electric push rod 57, a limit support bracket 58, a first L-shaped fixing frame 59, an eighth electric push rod 60, a first clamping and dragging plate 61, a blower 62, a cutting groove 63, a detection blowing groove 64, and a conveying bracket 6 5. The second L-shaped fixing frame 66, the second clamping and dragging plate 67 and the ninth electric push rod 68, the two limit support brackets 58 are respectively fixedly connected to the side ends of the conveying bracket 65, the cutting grooves 63 are evenly arranged on the upper parts of both sides of the conveying bracket 65, the detection blowing grooves 64 are symmetrically arranged through the middle part of the conveying bracket 65, the seventh electric push rod 57 is fixedly installed on the limit support bracket 58, the moving card plate 56 is slidably connected to the limit support bracket 58, and the front end of the seventh electric push rod 57 is connected to the moving card plate 56. The middle part of the outer end of the card plate 56 is fixedly connected, the first L-shaped fixing frame 59 is fixedly installed on the upper end of the mobile card plate 56, the eighth electric push rod 60 is symmetrically fixedly installed on the first L-shaped fixing frame 59, the first clamping and dragging plate 61 is fixedly connected to the bottom end of the eighth electric push rod 60, the second L-shaped fixing frame 66 is fixedly connected to the bottom end of the mobile card plate 56, the ninth electric push rod 68 is symmetrically fixedly installed on the second L-shaped fixing frame 66, and the second clamping and dragging plate 67 is fixedly connected to the ninth electric push rod 6 8, and the side end of the conveying bracket 65 is located between the first clamping and dragging plate 61 and the second clamping and dragging plate 67, and the inner ends of the first clamping and dragging plate 61 and the second clamping and dragging plate 67 are fixedly installed with rubber anti-slip pads, the blower 62 is symmetrically fixedly installed at the bottom end of the conveying bracket 65, and the blower 62 is located at the bottom of the detection blowing slot 64, and the cutting slots 63 evenly distributed at different positions can complete the cutting control of different widths of the film body, so that the cutting and trimming on both sides of the film body are convenient.

[0045] like Fig.13 and Fig.14As shown, the trimming section 54 includes a tenth electric push rod 69, a sliding support frame 70, a protective mounting cover 71, an eleventh electric push rod 72, a third synchronous wheel 73, a third synchronous belt 74, a fifth motor 75 and a cutting blade 76, the tenth electric push rod 69 is evenly fixedly mounted on the sliding support frame 70, the protective mounting cover 71 is arranged below the sliding support frame 70, and the bottom end of the tenth electric push rod 69 is fixedly connected to the upper end of the protective mounting cover 71, the eleventh electric push rod 72 is distributed on the inner side of the end of the sliding support frame 70, and the driving end of the eleventh electric push rod 72 is connected to the end of the sliding support frame 70. The inner side of the head is fixedly connected, the cutting disc 76 is evenly rotatably installed inside the protective mounting cover 71, the third synchronous wheel 73 is fixedly connected to the middle part of the side end of the cutting disc 76, and the third synchronous wheel 73 is rotatably clamped on the protective mounting cover 71, the third synchronous belt 74 is rotatably set between the third synchronous wheels 73, the fifth motor 75 is fixedly installed on the protective mounting cover 71, and the driving end of the fifth motor 75 is fixedly connected to the middle part of the outer end of a third synchronous wheel 73, and sufficient cutting processing can be achieved through the evenly distributed cutting discs 76, and the cutting position of the cutting disc 76 is convenient to adjust.

[0046] like Fig.15 and Fig.16 As shown, the detection unit 53 includes a supporting cross frame 77, an alarm 78, a detection mounting plate 79, a limit vertical plate 80, a detection foam plate 81, a pulling rope 82, a laser distance sensor 83 and a gas flow sensor 84. The supporting cross frame 77 is fixedly connected to the middle of the side end of the detection mounting plate 79, the alarm 78 is fixedly installed in the middle of the upper end of the detection mounting plate 79, the pulling rope 82 is fixedly connected to the bottom of the four end corners of the detection mounting plate 79, the detection foam plate 81 is fixedly connected to the bottom of the pulling rope 82, and the limit The vertical plates 80 are symmetrically fixedly connected to the bottom ends of both sides of the detection mounting plate 79, the laser distance sensor 83 is fixedly installed in the middle of the bottom end of the detection mounting plate 79, the gas flow sensor 84 is fixedly installed in the middle of the bottom end of the detection foam plate 81, and the detection foam plate 81 is located directly above the detection blowing slot 64. The air permeability of the membrane body can be conveniently and intuitively detected by the set detection foam plate 81 and the gas flow sensor 84, and the detection part 53 can be fixedly installed as a whole for use by the set supporting cross frame 77.

[0047] The two ends of the sliding support frame 70 are slidably connected to the limit support bracket 58, and the eleventh electric push rod 72 is fixedly installed on the bottom end of the conveying bracket 65, the conveying bracket 65 is fixedly connected to the end of the fixed frame 43, the support fixing frame 6 is fixedly connected to the bottom end of the fixed frame 43, the conveying support platform 41 and the fixed limit plate 33 are respectively fixedly connected to the second extrusion part 13 and the limit outer frame 19 in the first extrusion part 9, the fixed connecting plate 10 and the fixed support plate 12 are respectively fixedly connected to the limit outer frame 19 in the first extrusion part 9 and the second extrusion part 13, and the front end of the support limit frame 29 is fixedly connected to the outer end of the limit outer frame 19.

[0048] Working principle: The material discharged from the extruder is first conveyed to the interior of the first extrusion molding body 1, and the first electric push rod 11 set at the end of the first extrusion molding body 1 and the third extrusion molding body 5 is started. The spacing between the first extrusion molding part 9 and the second extrusion molding part 13 in the first extrusion molding body 1, the second extrusion molding body 3, and the third extrusion molding body 5 and the spacing between the fixed limit plate 33 and the conveying support platform 41 can be controlled, so that the material discharged from the extruder is extruded and conveyed by the extrusion molding rollers 17 evenly distributed between the first extrusion molding part 9 and the second extrusion molding part 13, so that the material is continuously extruded and molded. The first extrusion molding body 1, the second extrusion molding body 3 and the third extrusion molding body 5 can extrude the material longitudinally, and the first auxiliary extrusion molding body 2 and the second auxiliary extrusion molding body 4 distributed between the first extrusion molding body 1, the second extrusion molding body 3 and the third extrusion molding body 5 can realize transverse extrusion molding of the material, so that the material can be quickly extruded into a specified thickness, and the width of the polylactic acid breathable film after molding meets the requirements.

[0049] When the first extrusion molding body 1, the second extrusion molding body 3 and the third extrusion molding body 5 are used for guided conveying and extrusion molding, starting each first motor 26 can drive a first synchronous wheel 16 to rotate, and with the help of the first synchronous belt 15, the extrusion molding rollers 17 in each first extrusion part 9 and the second extrusion molding part 13 can be rotated in a synchronous manner in a specified direction to complete the conveying and extrusion processing of the prepared material body. The conveying hose 25 is connected to the drying system set externally, and high-temperature gas can be conveyed to each heating nozzle 23 through the conveying hose 25, so that the extrusion molding rollers 17 can have a certain temperature during the process of extruding the material discharged from the extruder, which can make the material body in the continuous long-distance extrusion molding process. The material body of the film is not cooled quickly during the molding process, and each extrusion molding roller 17 can have a specified temperature, so that the extrusion molding roller 17 with a low temperature will not be in continuous contact with the material body during the extrusion molding process of the material body. The outer end surface of the film body formed after extrusion is cooled, so that the material body has a certain viscosity during the continuous extrusion molding process, and can be fully extruded into a specified thickness, while improving the efficiency of extrusion molding. The first electric push rod 11 can control the distance between the first extrusion part 9 and the second extrusion part 13 in the first extrusion molding body 1, the second extrusion molding body 3 and the third extrusion molding body 5. The first extrusion part 9 and the second extrusion part 13 have the same structure and are distributed in a mirror-symmetrical manner, so that each first extrusion part The distance between the extrusion forming rollers 17 in the first extrusion part 9 and the second extrusion part 13 can be adjusted, and the extrusion degree of the material body can be adjusted, so that the material body discharged from the extruder can be quickly extruded into a film, and in the process of guiding the extrusion forming, the temperature detection part 14 set at the side end of each first extrusion part 9 and the second extrusion part 13 can detect the temperature between the heating nozzle 23 and the extrusion forming roller 17, and the second motor 30 is started to drive the driving gear 27 to rotate. The rotating driving gear 27 can drive the sliding gear plate 31 and the first temperature sensor 28 to slide forward along the supporting limit frame 29 to between the heating nozzle 23 and the extrusion forming roller 17, and the temperature between the heating nozzle 23 and the extrusion forming roller 17 is detected, so as to control the temperature of heating each extrusion forming roller 17. The temperature of the extrusion molding area of ​​the extrusion molding roller 17 in the first extrusion part 9 and the second extrusion part 13 can be controlled, so that the material discharged from the extruder will not cool quickly during the continuous extrusion process, and can achieve sufficient long-distance extrusion molding. The extrusion molding roller 17 with a specified temperature can obtain a more uniform film thickness and higher surface quality during extrusion molding. At the set temperature, the polylactic acid preparation material can flow better and be fully extruded, reducing the generation of defects such as bubbles and wrinkles. In addition, since the hot extrusion molding is carried out at a set temperature, the residual stress inside the material can be eliminated, and the dimensional stability and mechanical properties of the product can be improved. In addition, hot pressing molding can easily and quickly prepare polylactic acid breathable films with different thicknesses and properties.In addition, in the process of conveying and extruding the material discharged from the extruder, the second electric push rod 21 in the first extrusion part 9 and the second extrusion part 13 can be started in real time. The second electric push rod 21 can control the distance between the adjustment plate 22 and the limit outer frame 19 and the extrusion roller 17. The temperature of the heating gas conveyed in the conveying hose 25 can be controlled after the first temperature sensor 28 detects the temperature between the adjustment plate 22 and the extrusion roller 17. The temperature of the heating gas conveyed to the extrusion roller 17 can be controlled, and when the adjustment plate 22 is raised and lowered, the extrusion force of the auxiliary spring 20 can be indirectly controlled, so that the adaptive sliding adjustment frame 18 can be controlled to slide and adjust inside the limit outer frame 19, so that the extrusion roller 17 can be adjusted in a small range inside the limit outer frame 19, which can facilitate the small-scale control and adjustment of the extrusion molding force of the extrusion molding roller 17, and conveniently control the thickness of the polylactic acid breathable film extrusion molding.

[0050] After the material body is hot extruded and conveyed between each first extrusion part 9 and the second extrusion part 13 for longitudinal forming, it can quickly complete the transverse extrusion forming through the first auxiliary extrusion forming body 2 and the second auxiliary extrusion forming body 4, so that the width of the prepared polylactic acid breathable film can fully meet the preparation requirements, so that rapid transverse forming can be achieved during the shorter extrusion longitudinal forming, so that the length and width of the finally formed polylactic acid breathable film meet the requirements. When the material body is conveyed on the conveying support platform 41, the first extrusion forming body 1, the second extrusion forming body 3 and the third extrusion forming body 5 are briefly operated, and the continuous conveying state of the material body is released. At this time, the third electric push rod 32 is started to control the auxiliary extrusion plate 34 to press the material body downward, so as to achieve high-efficiency and rapid extrusion and thinning of the material body, and in this process, the third motor 38 in the first auxiliary extrusion forming body 2 and the second auxiliary extrusion forming body 4 is synchronously driven by the reducer. Start the operation, swing the rotating limit plate 36 to a certain angle, so that the transverse forming roller 40 is lifted, and then start the fourth electric push rod 37 to make the sliding adjustment plate 35 slide forward along the rotating limit plate 36, and again control the rotating limit plate 36 to rotate by the third motor 38, so that the transverse forming roller 40 swings downward and presses on the material body, and pulls the sliding adjustment plate 35 outward by the fourth electric push rod 37 so that the sliding adjustment plate 35 slides outward along the rotating limit plate 36. At this time, the transverse forming roller 40 can extrude the side end of the material body, and the third motor 38 and the fourth electric push rod 37 quickly control the transverse forming roller 40 to continuously press the side end of the material body in a short time, so that the material body can be extruded and formed horizontally, and the film body can be quickly formed in width, and in this process, the material body can be efficiently assisted to achieve thinning, so that the extrusion molding stroke can be shortened and the molding effect is good.

[0051] After the material extruded by the extruder is fully extruded and formed by the first extrusion molding body 1, the first auxiliary extrusion molding body 2, the second extrusion molding body 3, the second auxiliary extrusion molding body 4 and the third extrusion molding body 5, it enters the interior of the protective molding body 8 for step-by-step cooling and molding treatment. During the entire cooling process, the temperature of the cooling area gradually decreases, and it will not be directly and quickly cooled and molded. The gradual cooling allows the material to release the internal stress more evenly during the molding process, thereby reducing the defects and stress concentration inside the material. This uniform and gradual cooling molding process helps to improve the polylactic acid breathable film. Physical properties, such as tensile strength, elongation at break and elastic modulus, etc., rapid cooling may lead to uneven stress inside the material, thus causing deformation and shrinkage, while gradual cooling can reduce such stress difference, reduce the occurrence of deformation and shrinkage, and will not cause fine cracks in the formed polylactic acid breathable film due to rapid cooling, which helps to maintain the transparency and gloss of the polylactic acid breathable film. When the extruded film body enters the fixed frame 43, the fourth motor 47 can drive a second synchronous wheel 44 to rotate, and the second synchronous belt 46 can be used to synchronize the second synchronous wheels 44 and the conveying rollers 45. The film body is transported on each conveying roller 45 by means of the extrusion conveying of the extrusion forming roller 17. The sixth electric push rods 50 are started to control each sliding adjustment frame 51 to move downward by a specified distance, so that each dryer 49 is gradually increased in height from the feed end to the discharge end of the fixed frame 43, so that the temperature of the upper part of the conveying roller 45 located at different positions is gradually reduced, and the temperature of the air blown by each dryer 49 from the feed end to the discharge end of the fixed frame 43 is gradually reduced, so that the film body transported through the protective forming body 8 can be gradually cooled from high to low temperature. During the cooling and molding process, starting the fifth electric push rod 42 can assist in adjusting and controlling the distance between each dryer 49 and the conveying roller 45, which can indirectly control the cooling intensity, and according to the needs of gradual cooling and molding, the protective molding body 8 with different distances between the dryers 49 can be adapted, or the protective molding bodies 8 with different lengths can be adapted, or different numbers of protective molding bodies 8 can be arranged and used, so as to ensure that the regional temperature inside the protective molding body 8 is gradually reduced, so that the cooling and molding is sufficient, and the film body will not be cooled and molded quickly, so that the prepared film body has good quality.

[0052] After the film body is discharged from the protective molding body 8 after cooling and molding, it enters the conveying bracket 65 for conveying and then is wound up. When the film body is slowly and evenly conveyed by the conveying bracket 65, the tenth electric push rod 69 is started to make the protective mounting cover 71 move downward, and the fifth motor 75 is started to make each cutting disc 76 rotate with the help of the third synchronous belt 74 and the third synchronous wheel 73, so that the symmetrically distributed cutting discs 76 cut the two sides of the film body, so that the two sides of the film body are trimmed. According to the width requirements of the film preparation, starting the eleventh electric push rod 72 can make the sliding support frame 70 slide horizontally along the limiting support bracket 58, adjust the cutting process of the cutting disc 76, so that the cutting disc 76 can be accurately moved to the top of the preset commonly used specification cutting groove 63, and with the help of the preset cutting groove 63, the cutting disc 76 can complete the fast cutting process conveniently, and can The second clamping and dragging plate 67 is moved to the top of the support bracket 58, and the second clamping and dragging plate 67 is moved to the top of the support bracket 58, and the first clamping and dragging plate 61 and the second clamping and dragging plate 67 are moved to the top of the support bracket 58, and the cut film on both sides of the film body is clamped and pulled out by the first clamping and dragging plate 61 and the second clamping and dragging plate 67, so that the cut and trimmed film can be discharged from the conveying bracket 65, so that the cutting and trimming of the cutting blade 76 can be carried out continuously and conveniently, and the staff can recycle the film pulled out by the first clamping and dragging plate 61 and the second clamping and dragging plate 67 in time, so that the two sides of the film body discharged and rolled up from the conveying bracket 65 are flat.

[0053] When the membrane is being trimmed on the conveying bracket 65, the blower 62 is started. The blower 62 can make the detection blowing slot 64 blow out high-speed wind upwards, and the membrane passes through the detection blowing slot 64 during the conveying process. The blown wind can separate the membrane from the parts cut on both sides, and can also detect the air permeability of the membrane. After the gas passes through the membrane, it will blow the detection foam plate 81 up, and the detection foam plate 81 rises to a specified height under the limit of the limit vertical plate 80. At this time, the pulling rope 82 is bent, and the change in the height of the detection foam plate 81 is detected by the laser distance sensor 83 to judge the air permeability of the membrane. When the air permeability does not meet the requirements, the height of the detection foam plate 81 is lower than the detection set range, and the alarm 78 sounds. The pre-set value is obtained by multiple tests under the same conditions using a membrane that meets the requirements, and the gas flow sensor 84 arranged at the bottom of the detection foam plate 81 can detect the gas flow conditions on the upper end surface of the membrane, so that the two detection methods are carried out synchronously, so that the results of the membrane detection are accurate and can be observed intuitively, so that the air permeability of the prepared membrane meets the requirements. During the use of this equipment, some existing production and preparation equipment can be installed internally for use.

[0054] 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 polylactic acid breathable film production device, comprising a first extrusion molding body (1), a first auxiliary extrusion molding body (2), a second extrusion molding body (3), a second auxiliary extrusion molding body (4), a third extrusion molding body (5), a supporting and fixing frame (6), a trimming and detecting body (7) and a protective molding body (8), characterized in that: The first extrusion molding body (1), the second extrusion molding body (3) and the third extrusion molding body (5) are evenly arranged, and the first auxiliary extrusion molding body (2) and the second auxiliary extrusion molding body (4) are respectively arranged between the first extrusion molding body (1) and the second extrusion molding body (3) and between the second extrusion molding body (3) and the third extrusion molding body (5), and the first extrusion molding body (1), the second extrusion molding body (3) and the third extrusion molding body (5) have the same structure, the first auxiliary extrusion molding body (2) and the second auxiliary extrusion molding body (4) have the same structure, the protective molding body (8) is arranged at the side end of the third extrusion molding body (5) away from the second auxiliary extrusion molding body (4), the supporting fixing frame (6) is evenly fixedly connected to the bottom end of the protective molding body (8), and the trimming and detecting body (7) is arranged at one end of the protective molding body (8) away from the third extrusion molding body (5); The first extrusion molding body (1), the second extrusion molding body (3) and the third extrusion molding body (5) all comprise a first extrusion part (9), a fixed connection plate (10), a first electric push rod (11), a fixed support plate (12), a second extrusion part (13) and a temperature detection part (14); the first extrusion part (9) and the second extrusion part (13) are arranged in a mirror-symmetrical manner; the fixed connection plate (10) is fixedly connected to the end of the first extrusion part (9); the fixed support plate (12) is fixedly connected to the end of the second extrusion part (13); the first electric push rod (11) is fixedly mounted on the fixed support plate (12); and the upper end of the first electric push rod (11) is fixedly connected to the fixed connection plate (10). The two temperature detection parts (14) are respectively arranged at the side ends of the first extrusion part (9) and the second extrusion part (13); the first auxiliary extrusion molding body (2) comprises a third electric push rod (32), a fixed limit plate (33), an auxiliary extrusion plate (34), a sliding adjustment plate (35), a rotating limit plate (36), a fourth electric push rod (37), a third motor (38), an auxiliary support plate (39), a transverse molding roller (40) and a conveying support platform (41); the fixed limit plate (33) is arranged directly above the conveying support platform (41); the third electric push rod (32) is fixedly installed in the middle of the fixed limit plate (33), and the front end of the third electric push rod (32) is inserted through the fixed limit plate (33). The auxiliary extrusion plate (34) is arranged at the middle part of the fixed limit plate (33), the auxiliary extrusion plate (34) is arranged at the bottom of the fixed limit plate (33), and the bottom end of the third electric push rod (32) is fixedly connected to the middle part of the upper end of the auxiliary extrusion plate (34), the auxiliary support plate (39) is fixedly connected to the side end of the conveying support platform (41), the middle parts of both sides of the rotation limit plate (36) are rotatably clamped on the auxiliary support plate (39), the third motor (38) is fixedly mounted on the auxiliary support plate (39), and the front end of the third motor (38) is fixedly connected to the middle part of the side end of the rotation limit plate (36) through a reducer, the sliding adjustment plate (35) is slidably clamped on the rotation limit plate (36), and the The transverse forming roller (40) is symmetrically rotated and clamped inside the end of the sliding adjustment plate (35); the fourth electric push rod (37) is fixedly installed on the inner side of the rotation limit plate (36), and the front end of the fourth electric push rod (37) is fixedly connected to the sliding adjustment plate (35); the protective forming body (8) comprises a fifth electric push rod (42), a fixed frame (43), a second synchronous wheel (44), a conveying roller (45), a second synchronous belt (46), a fourth motor (47), a second temperature sensor (48), a dryer (49), a sixth electric push rod (50), a sliding adjustment frame (51) and a movable adjustment frame (52); the fixed frame (43) is arranged directly below the movable adjustment frame (52);The fifth electric push rod (42) is evenly fixedly connected to the side end of the fixed frame (43), the upper end of the fifth electric push rod (42) is fixedly connected to the side end of the movable adjustment frame (52), the sliding adjustment frame (51) is evenly slidably clamped on the movable adjustment frame (52), the sixth electric push rod (50) is distributed on both sides of the sliding adjustment frame (51), and the sixth electric push rod (50) is fixedly installed on the movable adjustment frame (52), the upper end of the sixth electric push rod (50) is fixedly connected to the sliding adjustment frame (51), the dryer (49) is evenly fixedly installed in the middle of the sliding adjustment frame (51), and the conveying roller (45) is evenly rotatably clamped on the fixed frame (43), the second synchronous wheel (44) is fixedly connected to the end of the conveying roller (45), and the second synchronous wheel (44) is rotatably arranged on the fixed frame (43), the second synchronous belt (46) is rotatably arranged between adjacent second synchronous wheels (44), the fourth motor (47) is fixedly installed on the fixed frame (43), and the driving end of the fourth motor (47) is fixedly connected to the middle part of the outer end of a second synchronous wheel (44) through a reducer, the second temperature sensor (48) is evenly arranged in the middle part of the fixed frame (43), and the conveying roller (45) is located directly below the dryer (49), and the trimming detection body (7) includes a detection part (5 3), a trimming portion (54) and a support and forming portion (55), the two detection portions (53) being arranged above the middle portion of the support and forming portion (55), the trimming portions (54) being arranged at the side ends of the support and forming portion (55), the support and forming portion (55) comprising a movable card plate (56), a seventh electric push rod (57), a position-limiting support bracket (58), a first L-shaped fixing frame (59), an eighth electric push rod (60), a first clamping and dragging plate (61), a blower (62), a cutting groove (63), a detection blowing groove (64), a conveying bracket (65), a second L-shaped fixing frame (66), a second clamping and dragging plate (67) and a ninth electric push rod (68), the two position-limiting support brackets (58) being fixed respectively The seventh electric push rod (57) is fixedly connected to the side end of the conveying bracket (65), the cutting grooves (63) are evenly arranged on the upper parts of both sides of the conveying bracket (65), the detection blowing grooves (64) are symmetrically penetrated and arranged in the middle part of the conveying bracket (65), the seventh electric push rod (57) is fixedly mounted on the limit support bracket (58), the movable card plate (56) is slidably clamped on the limit support bracket (58), and the front end of the seventh electric push rod (57) is fixedly connected to the middle part of the outer end of the movable card plate (56), the first L-shaped fixing frame (59) is fixedly mounted on the upper end of the movable card plate (56), and the eighth electric push rod (60) is symmetrically fixedly mounted on the first L-shaped fixing frame (59).The first clamping and dragging plate (61) is fixedly connected to the bottom end of the eighth electric push rod (60), the second L-shaped fixing frame (66) is fixedly connected to the bottom end of the moving card plate (56), the ninth electric push rod (68) is symmetrically fixedly mounted on the second L-shaped fixing frame (66), the second clamping and dragging plate (67) is fixedly connected to the upper end of the ninth electric push rod (68), and the side end of the conveying bracket (65) is located between the first clamping and dragging plate (61) and the second clamping and dragging plate (67), and the inner side ends of the first clamping and dragging plate (61) and the second clamping and dragging plate (67) are fixedly mounted with rubber anti-slip pads, and the blower (62) is symmetrically fixedly mounted on the bottom end of the conveying bracket (65), and the blower (62) is located at the bottom of the detection blowing slot (64).

2. The polylactic acid breathable film production equipment according to claim 1, characterized in that: The first extrusion part (9) and the second extrusion part (13) both comprise a first synchronous belt (15), a first synchronous wheel (16), an extrusion forming roller (17), an adaptive sliding adjustment frame (18), a limit outer frame (19), an auxiliary spring (20), a second electric push rod (21), an adjustment plate (22), a heating nozzle (23), an electromagnetic valve (24), a conveying hose (25) and a first motor (26); the second electric push rod (21) is fixedly connected to the bottom of the end angle of the limit outer frame (19); the adjustment plate (22) is arranged below the limit outer frame (19); and the bottom end of the second electric push rod (21) is fixedly connected to the upper end angle of the adjustment plate (22); the adaptive sliding adjustment frame (18) is slidably engaged inside the limit outer frame (19); the extrusion forming roller (17) is evenly rotatably mounted inside the adaptive sliding adjustment frame (18); The first synchronous wheel (16) is fixedly connected to the two ends of the extrusion forming roller (17); the first synchronous belt (15) is rotatably arranged between adjacent first synchronous wheels (16); the first motor (26) is fixedly mounted on the side end of the adaptive sliding adjustment frame (18) through an auxiliary mounting frame, and the driving end of the first motor (26) is fixedly connected to the middle part of the outer end of one of the first synchronous wheels (16); the auxiliary spring (20) is evenly fixedly mounted between the bottom ends of both sides of the adaptive sliding adjustment frame (18) and the side ends of the adjustment plate (22); the solenoid valve (24) is symmetrically fixedly mounted on the bottom end of the adjustment plate (22); the conveying hose (25) is fixedly connected to the solenoid valve (24); the heating nozzle (23) is evenly fixedly mounted inside the adjustment plate (22), and the heating nozzle (23) is located directly below the extrusion forming roller (17).

3. A polylactic acid breathable film production equipment according to claim 2, characterized in that: The temperature detection unit (14) comprises a driving gear (27), a first temperature sensor (28), a support and limit frame (29), a second motor (30) and a sliding tooth plate (31); the sliding tooth plate (31) is slidably engaged with the supporting and limit frame (29); the driving gear (27) is rotationally engaged with the middle part of the supporting and limit frame (29); the second motor (30) is fixedly mounted on the supporting and limit frame (29); and the second motor (30) is fixedly connected to the middle part of the side end of the driving gear (27) via a reducer; and the first temperature sensor (28) is evenly and fixedly mounted on the front end of the sliding tooth plate (31).

4. The polylactic acid breathable film production equipment according to claim 3, characterized in that: The trimming section (54) comprises a tenth electric push rod (69), a sliding support frame (70), a protective mounting cover (71), an eleventh electric push rod (72), a third synchronous wheel (73), a third synchronous belt (74), a fifth motor (75) and a cutting blade (76), wherein the tenth electric push rod (69) is evenly fixedly mounted on the sliding support frame (70), the protective mounting cover (71) is arranged below the sliding support frame (70), and the bottom end of the tenth electric push rod (69) is fixedly connected to the upper end of the protective mounting cover (71), the eleventh electric push rod (72) is distributed on the inner side of the end of the sliding support frame (70), and the tenth electric push rod (69) is fixedly connected to the upper end of the protective mounting cover (71), The driving end of an electric push rod (72) is fixedly connected to the inner side of the end of the sliding support frame (70); the cutting blade disc (76) is evenly rotatably mounted inside the protective mounting cover (71); the third synchronous wheel (73) is fixedly connected to the middle of the side end of the cutting blade disc (76), and the third synchronous wheel (73) is rotatably engaged with the protective mounting cover (71); the third synchronous belt (74) is rotatably arranged between the third synchronous wheels (73); the fifth motor (75) is fixedly mounted on the protective mounting cover (71), and the driving end of the fifth motor (75) is fixedly connected to the middle of the outer end of one of the third synchronous wheels (73).

5. The polylactic acid breathable film production equipment according to claim 4, characterized in that: The detection part (53) includes a supporting cross frame (77), an alarm (78), a detection installation plate (79), a limit vertical plate (80), a detection foam plate (81), a pulling string (82), a laser distance sensor (83) and a gas flow sensor (84), wherein the supporting cross frame (77) is fixedly connected to the middle part of the side end of the detection installation plate (79), the alarm (78) is fixedly installed at the middle part of the upper end of the detection installation plate (79), and the pulling string (82) is fixedly connected to the detection installation plate The detection foam plate (81) is fixedly connected to the bottom of the pulling rope (82) at the four end corners of the detection mounting plate (79), the limit vertical plate (80) is symmetrically fixedly connected to the bottom ends of both sides of the detection mounting plate (79), the laser distance sensor (83) is fixedly installed in the middle of the bottom end of the detection mounting plate (79), the gas flow sensor (84) is fixedly installed in the middle of the bottom end of the detection foam plate (81), and the detection foam plate (81) is located directly above the detection blowing slot (64).

6. The polylactic acid breathable film production equipment according to claim 5, characterized in that: The two ends of the sliding support frame (70) are slidably connected to the limit support bracket (58), and the eleventh electric push rod (72) is fixedly mounted on the bottom end of the conveying bracket (65), the conveying bracket (65) is fixedly connected to the end of the fixed frame (43), the support fixing frame (6) is fixedly connected to the bottom end of the fixed frame (43), the conveying support platform (41) and the fixed limit plate (33) are respectively fixedly connected to the second extrusion part (13) and the limit outer frame (19) in the first extrusion part (9), the fixed connecting plate (10) and the fixed support plate (12) are respectively fixedly connected to the limit outer frame (19) in the first extrusion part (9) and the second extrusion part (13), and the front end of the support limit frame (29) is fixedly connected to the outer end of the limit outer frame (19).

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