A polypropylene biaxial stretching process with uniform roughness and its equipment

Abstract

The invention discloses a polypropylene biaxial stretching process and equipment with uniform roughness, and belongs to the technical field of capacitor film processing. The polypropylene biaxial stretching process and equipment with uniform roughness, by setting a heater and a jet roller, when the polypropylene material is jet-assisted in stretching by the jet roller, the heater and the air pump need to be started, because the second telescopic tube is connected with the tee, and the tee is connected with the second rotating shaft and the jet roller, so that the heated gas can be discharged through the through hole on the surface of the jet roller after entering the jet roller, so as to be evenly sprayed on the surface of the polypropylene material, and the temperature of the polypropylene material after leaving the heating box is further guaranteed by discharging high-temperature gas while jet-assisted stretching is achieved by the jet roller, so as to avoid the situation that the polypropylene material is difficult to stretch due to too low temperature, and to avoid the situation that the equipment is damaged by repeatedly stretching the polypropylene material with too high hardness, so as to ensure the service life of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor film processing, in particular to a polypropylene biaxial stretching process with uniform roughness and equipment thereof. Background Art

[0002] Only when ultra-high molecular weight polypropylene fibers are stretched by multiple times can the macromolecules be oriented and stress-induced crystallization be promoted, and the performance of the finished fiber will be better. Therefore, improving the macromolecular orientation and crystallinity is the key to ensuring the performance of the finished product.

[0003] Super-stretching is generally carried out above the glass transition temperature, at which time the long chains and segments of the macromolecules can be oriented at the same time. On the one hand, the already formed crystalline units are not simply arranged regularly and neatly along the direction of the external force. In the process, the original crystals often slip, rotate, or even break. Then, under new equilibrium conditions, new crystalline structures are re-formed, that is, the original folded chain crystals are disintegrated and transformed into straight chain crystals, forming a structure in which the amorphous regions are uniformly dispersed in a continuous straight chain crystal matrix. With the increase of the stretching multiple and the increase of the stretching temperature, the proportion of folded chains decreases, the straight chains increase, and the degree of orientation increases. On the other hand, after the crystals are destroyed, the increase in the number of molecular segments and the change in the order state also increase the degree of orientation, thereby increasing the degree of crystallinity and improving the performance of the fiber.

[0004] After taking the polypropylene out of the heating box, the polypropylene material will cool down rapidly. During the actual processing, the molecules of the polypropylene material will be tightly connected and the molecular activity will be reduced due to the decrease in temperature. This will not only cause breakage during the stretching process, but forced stretching will also cause damage to the equipment. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above and / or existing problems in the processing of existing capacitor films, the present invention is proposed.

[0007] Therefore, the technical problem to be solved by the present invention is that after the polypropylene is taken out of the heating box, the polypropylene material will cool down rapidly. During the actual processing, the molecules of the polypropylene material will be tightly connected and the molecular activity will be reduced due to the decrease in temperature, which will not only lead to easy breakage during the stretching process, but also forced stretching will cause damage to the equipment.

[0008] To achieve the above object, the present invention provides the following technical solution: a polypropylene biaxial stretching process with uniform roughness and its equipment, comprising:

[0009] The body structure, including the body shell, is capable of supporting polypropylene;

[0010] The stretching mechanism has a bottom fixedly connected to the body shell, and includes a swing mechanism, a connecting mechanism and an air jet mechanism, wherein the swing mechanism drives the air jet mechanism to swing through the connecting mechanism, and the air jet mechanism contacts the polypropylene, wherein the air jet mechanism is provided with a plurality of through holes; and

[0011] The air delivery mechanism is supported by the body shell, and includes an air pump, a first conduit arranged at the air inlet of the air pump, an air inlet pipe and an air inlet cover, a heating component arranged at the exhaust port of the air pump, a second conduit, and a second telescopic tube, wherein the second telescopic tube is connected to the jet mechanism, wherein the air inlet cover is arranged on both sides of the inner wall of the body shell and is located below the polypropylene.

[0012] Furthermore, the stretching mechanism includes a first rotating shaft, and the swinging mechanism includes a sealed shell and a movable plate, wherein the movable plate can slide in the sealed shell, the lower part of the sealed shell is fixedly connected to the first rotating shaft, and the upper part of the movable plate is fixedly connected to the connecting mechanism.

[0013] Furthermore, the swing mechanism also includes a sealing plate and a limiting rod, wherein the limiting rod is fixedly connected to both sides of the inner wall of the sealing shell, the lower part of the movable plate is fixedly connected to the upper part of the sealing plate, and the lower part of the sealing plate overlaps the limiting rod.

[0014] Furthermore, it also includes a pressure mechanism and a transmission mechanism, the bottom of the transmission mechanism and the bottom of the pressure mechanism are fixedly connected to the bottom of the inner wall of the body shell, wherein the sealed shell and the pressure mechanism overlap, the sealed shell is connected to the transmission mechanism, the pressure mechanism is connected to the transmission mechanism, gas is arranged in the pressure mechanism, the sealed shell can squeeze the pressure mechanism, so that the gas passes through the transmission mechanism and enters the sealed shell to push the sealing plate and the movable plate up.

[0015] Furthermore, the connection mechanism includes a bracket plate, which is fixedly connected above the movable plate.

[0016] A second rotating shaft is sleeved in the bracket plate, and an air hole is opened at one end of the second rotating shaft; one end of the second rotating shaft is connected to the jet mechanism, and the other end of the second rotating shaft is connected to the second telescopic tube.

[0017] Furthermore, the pressure mechanism includes a sliding sleeve, a slide plate and a push plate, the lower part of the sliding sleeve is fixedly connected to the lower part of the inner wall of the body shell, one side of the slide plate can slide in the sliding sleeve, and the other side of the slide plate is fixedly connected to the push plate, and the other side of the push plate overlaps the sealed shell, wherein the sliding sleeve contains gas.

[0018] Furthermore, the transmission mechanism includes a first telescopic tube, one end of which is connected to the sealing shell, and the bottom end of the first telescopic tube is connected to the connecting sleeve, and the connecting sleeve is connected to the transmission tube; the other end of the transmission tube is connected to the sliding sleeve.

[0019] Furthermore, the first duct is respectively connected to four air intake pipes, the two air intake pipes on one side are connected to the same air intake hood, one end of the second duct is connected to the second telescopic tube, and the second telescopic tube is a multi-section telescopic tube; the other end of the second telescopic tube is connected to the jet mechanism through a tee.

[0020] Furthermore, the body mechanism also includes four disassembly brackets, a fixed bracket and a stretching roller, wherein the stretching roller is connected to the fixed bracket, the four disassembly brackets are respectively fixedly connected to the two sides of the body shell, and the four disassembly brackets are fixedly connected to the outside of the fixed brackets, and the two fixed brackets located on one side are connected to the same stretching roller.

[0021] The present invention also provides a polypropylene biaxial stretching process with uniform roughness, comprising the following steps:

[0022] S1. Heat the polypropylene material in a heating box until it reaches 40-100°C, then remove it and fix it in a stretching device for stretching;

[0023] S2, cooling and shaping the polypropylene material after the primary stretching, maintaining the temperature at 10-20°C, and performing secondary stretching when the temperature of the polypropylene is maintained at room temperature;

[0024] S3. The polypropylene material is heated again in a heating box. After being heated to 40-80°C, it is removed and fixed in a stretching device for secondary stretching treatment.

[0025] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0026] The polypropylene biaxial stretching process with uniform roughness and the equipment thereof are provided with a heating component and an air jet mechanism, so that the stretching equipment can increase the surface heating uniformity by repeatedly swinging left and right during the process of processing the polypropylene, and the repeated friction and extrusion are more helpful for the external equipment to stretch the polypropylene, thereby avoiding the breakage of the polypropylene material during the stretching process.

[0027] A heating component and an air pump are provided so that the air pump extracts gas and injects gas into the heating component at the same time, so that the heated gas can be discharged through the through holes on the surface of the jet roller after entering the jet component, thereby being evenly sprayed on the surface of the polypropylene material. While the friction-assisted stretching is achieved by the jet roller, the temperature of the polypropylene material after leaving the heating box is further guaranteed by discharging high-temperature gas, thereby avoiding the situation where the polypropylene material is difficult to stretch due to too low a temperature, and avoiding the situation where the polypropylene material with too high a hardness is repeatedly stretched to cause damage to the equipment, thereby ensuring the service life of the equipment.

[0028] The provision of an air intake hood not only realizes the secondary utilization of heat and reduces the energy consumption of the heater in heating the gas, but also prevents the heat dissipation from polluting the air and the environment, thereby improving the safety when using the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0030] Figure 1 A three-dimensional structural schematic diagram of a polypropylene biaxial stretching process with uniform roughness and its equipment according to an embodiment of the present invention.

[0031] Figure 2 The present invention provides a schematic diagram of a three-dimensional cross-sectional structure of a polypropylene biaxial stretching process with uniform roughness and a machine body mechanism in the equipment thereof according to an embodiment of the present invention.

[0032] Figure 3 This is a three-dimensional structural schematic diagram of a polypropylene biaxial stretching process with uniform roughness and a stretching mechanism in the equipment described in an embodiment of the present invention.

[0033] Figure 4 A three-dimensional structural schematic diagram of a polypropylene biaxial stretching process with uniform roughness and a swing mechanism in the equipment thereof according to an embodiment of the present invention.

[0034] Figure 5 The present invention provides a schematic diagram of a three-dimensional cross-sectional structure of a swaying mechanism in a polypropylene biaxial stretching process with uniform roughness and its equipment as described in an embodiment of the present invention.

[0035] Figure 6 A polypropylene biaxial stretching process and equipment with uniform roughness as described in the embodiment of the present invention Figure 6 Schematic diagram of the structure enlarged at point A in the middle.

[0036] Figure 7 This is a three-dimensional structural schematic diagram of a polypropylene biaxial stretching process with uniform roughness and a gas transmission mechanism in the equipment described in an embodiment of the present invention.

[0037] Figure 8 A schematic diagram of the stretching process flow in a polypropylene biaxial stretching process with uniform roughness and its equipment as described in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0041] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0042] Example 1

[0043] like Figure 1-3 and Figure 6 As shown, the present invention provides a technical solution: a polypropylene biaxial stretching process with uniform roughness and equipment thereof, comprising:

[0044] S1. Heat the polypropylene material in a heating box until it reaches 40-100°C, then remove it and fix it in a stretching device for stretching;

[0045] S2, cooling and shaping the polypropylene material after the primary stretching, maintaining the temperature at 10-20°C, and performing secondary stretching when the temperature of the polypropylene is maintained at room temperature;

[0046] S3, heating the polypropylene material again in a heating box, and after heating to 40-80°C, removing it and fixing it in a stretching device for secondary stretching treatment;

[0047] When the polypropylene material is stretched in the above manner, it also specifically involves a polypropylene biaxial stretching device with uniform roughness, including a body mechanism 100, a stretching mechanism 200 and a gas transmission mechanism 300. Specifically, it includes a body mechanism 100, including a body shell 101, capable of supporting polypropylene; a stretching mechanism 200, the bottom of which is fixedly connected to the body shell 101, including a swing mechanism 203, a connecting mechanism 204 and an air jet mechanism 205, wherein the swing mechanism 203 drives the air jet mechanism 205 to swing through the connecting mechanism 204, and the air jet mechanism 205 contacts the polypropylene, wherein the air jet mechanism 205 is provided with a plurality of through holes 205b; and an air delivery mechanism 300, supported by the body shell 101, including an air pump 301a, a first conduit 302 arranged at the air inlet of the air pump 301a, an air inlet pipe 303 and an air inlet cover 304, a heating component 301 arranged at the exhaust port of the air pump 301a, a second conduit 305, and a second telescopic tube 306, wherein the second telescopic tube 306 is connected to the air jet mechanism 205, wherein the air inlet cover 304 is arranged on both sides of the inner wall of the body shell 101 and is located below the polypropylene. By setting the heating component and the jet mechanism, the stretching device can increase the friction between the device and the polypropylene by repeatedly swinging left and right during the process of processing the polypropylene, and increase the temperature of the polypropylene surface by friction. In addition, the heated gas can be discharged through the through hole after entering the jet component, so as to be evenly sprayed on the surface of the polypropylene material, thereby avoiding the polypropylene material from breaking during the stretching process.

[0048] Further: A polypropylene biaxial stretching device with uniform roughness, comprising:

[0049] The machine body mechanism 100 includes a machine body shell 101, four disassembly brackets 102 arranged on the machine body shell 101, a fixed bracket 103 connected to the disassembly bracket 102, and a stretching roller 104, wherein the stretching roller 104 is connected to the fixed bracket 103; and,

[0050] The stretching mechanism 200 includes a swing mechanism 203, two pressure mechanisms 206 arranged on both sides of the swing mechanism 203, a connecting mechanism 204 connected to the top of the swing mechanism 203, an air jet mechanism 205 and a transmission mechanism 208, wherein the air jet mechanism 205 is connected to the connecting mechanism 204; and,

[0051] The gas delivery mechanism 300 includes a heating component 301 , a first conduit 302 , an air intake pipe 303 and an air intake cover 304 connected to the first conduit 302 , a second conduit 305 and a second telescopic tube 306 , wherein the second conduit 305 is connected to the heating component 301 .

[0052] In this embodiment, by providing a heater 301b and an air jet roller 205a, when the polypropylene material is subjected to friction-assisted stretching by the air jet roller 205a, the heater 301b and the air pump 301a need to be started, so that the air pump 301a extracts gas and injects gas into the heater 301b at the same time, and the heated gas is transmitted to the second telescopic tube 306 along the second conduit 305. Since the second telescopic tube 306 is connected to the tee 207, and the tee 207 is connected to the second rotating shaft 204c and the air jet roller 205a, the heated gas can be discharged through the through hole 205b on the surface of the air jet roller 205a after entering the air jet roller 205a, so as to be evenly sprayed on the surface of the polypropylene material. While the friction-assisted stretching is achieved by the air jet roller 205a, the temperature of the polypropylene material after leaving the heating box is further guaranteed by discharging high-temperature gas, so as to avoid the situation that the polypropylene material is difficult to stretch due to too low temperature, and to avoid the situation that the equipment is damaged by repeatedly stretching the polypropylene material with too high hardness, thereby ensuring the service life of the equipment.

[0053] Example 2

[0054] The two sides of the body shell 101 are fixedly connected to the four disassembly brackets 102 respectively, and the four disassembly brackets 102 are fixedly connected to the outside of each other with a fixed bracket 103. The two fixed brackets 103 on one side are connected to the same stretching roller 104, and the stretching roller 104 is rotatably connected to one side of the fixed bracket 103. A first rotating shaft 202 is fixedly connected to the bottom of the swing mechanism 203, and two ends of the first rotating shaft 202 are respectively sleeved with two first bearings 201. Two connecting mechanisms 204 are fixedly connected to the top of the swing mechanism 203. The swing mechanism 203 is mutually clamped with the same jet mechanism 205 through the two connecting mechanisms 204. The two sides of the jet mechanism 205 are respectively overlapped with two pressure mechanisms 206. The other side of the connecting mechanism 204 is connected with a tee 207. The two sides of the swing mechanism 203 are respectively connected with two transmission mechanisms 208. The first bearing 201 is clamped in the body shell 101. The bottom of the transmission mechanism 208 and the bottom of the pressure mechanism 206 are fixedly connected to the bottom of the inner wall of the body shell 101.

[0055] Combined with Figure 2 and attached Figure 4The stretching mechanism 200 includes a first rotating shaft 202, and the swing mechanism 203 includes a sealed housing 203a and a movable plate 203b, wherein the movable plate 203b can slide in the sealed housing 203a, the lower part of the sealed housing 203a is fixedly connected to the first rotating shaft 202, and the upper part of the movable plate 203b is fixedly connected to the connecting mechanism 204. The swing mechanism 203 may also include a sealing plate 203c and a limiting rod 203d, wherein the limiting rod 203d is fixedly connected to both sides of the inner wall of the sealed housing 203a, the lower part of the movable plate 203b is fixedly connected to the upper part of the sealing plate 203c, and the lower part of the sealing plate 203c overlaps the limiting rod 203d.

[0056] In a preferred embodiment, the stretching equipment may further include a pressure mechanism 206 and a transmission mechanism 208, wherein the bottom of the transmission mechanism 208 and the bottom of the pressure mechanism 206 are fixedly connected to the bottom of the inner wall of the body shell 101, wherein the sealed shell 203a is overlapped with the pressure mechanism 206, the sealed shell 203a is communicated with the transmission mechanism 208, the pressure mechanism 206 is communicated with the transmission mechanism 208, gas is arranged in the pressure mechanism 206, the sealed shell 203a can squeeze the pressure mechanism 206, so that the gas passes through the transmission mechanism 208 and enters the sealed shell 203a to push the sealing plate 203c and the movable plate 203b to move upward.

[0057] Specifically: the two sides of the body shell 101 are fixedly connected to the four disassembly brackets 102 respectively, and the four disassembly brackets 102 are fixedly connected to the outside of the four disassembly brackets 103, and the two fixed brackets 103 on one side are connected to the same stretching roller 104, and the stretching roller 104 is rotatably connected to one side of the fixed bracket 103. A first rotating shaft 202 is fixedly connected to the bottom of the swing mechanism 203, and two ends of the first rotating shaft 202 are respectively sleeved with two first bearings 201. Two connecting mechanisms 204 are fixedly connected to the top of the swing mechanism 203. The swing mechanism 203 is mutually clamped with the same jet mechanism 205 through the two connecting mechanisms 204. The two sides of the jet mechanism 205 are respectively overlapped with two pressure mechanisms 206. The other side of the connecting mechanism 204 is connected with a tee 207. The two sides of the swing mechanism 203 are respectively connected with two transmission mechanisms 208. The first bearing 201 is clamped in the body shell 101. The bottom of the transmission mechanism 208 and the bottom of the pressure mechanism 206 are fixedly connected to the bottom of the inner wall of the body shell 101.

[0058] The swing mechanism 203 includes a sealed shell 203a, in which a movable plate 203b is slidably connected, the lower part of the movable plate 203b is fixedly connected to the upper part of the sealing plate 203c, the lower part of the sealing plate 203c overlaps with the limiting rod 203d, the limiting rod 203d is fixedly connected to both sides of the inner wall of the sealed shell 203a, a movable groove 203e is provided above the movable plate 203b, the lower part of the sealed shell 203a is fixedly connected to the first rotating shaft 202, the upper part of the movable plate 203b is fixedly connected to the two connecting mechanisms 204, and the two sides of the sealed shell 203a are fixedly connected to the first rotating shaft 202, and the upper part of the movable plate 203b is fixedly connected to the two connecting mechanisms 204. The two sides of the sealed housing 203a are respectively overlapped with the two pressure mechanisms 206, and the two sides of the sealed housing 203a are respectively connected with the two transmission mechanisms 208. The connecting mechanism 204 includes a bracket plate 204a, and a second bearing 204b is fixedly connected to the top of the bracket plate 204a. A second rotating shaft 204c is sleeved in the second bearing 204b, and an air hole is opened at one end of the second rotating shaft 204c. The bracket plate 204a is fixedly connected to the top of the movable plate 203b, and one end of the second rotating shaft 204c is connected to the tee 207 through a sleeve, and the other end of the second rotating shaft 204c is connected to the jet mechanism 205.

[0059] In this embodiment: when the sealed shell 203a swings to the left, it will squeeze the push plate 206c on the left, so that the left push plate 206c pushes the slide plate 206b to inject the gas in the sleeve 206a into the sealed shell 203a through the transmission pipe 208c and the first telescopic pipe 208a, so that the air pressure in the sealed shell 203a increases and pushes the movable plate 203b to move upward. At this time, as the swing amplitude of the sealed shell 203a increases, more gas will enter the sealed shell 203a, and because the height of the movable plate 203b in the swinging state will be lower than the height of the sealed shell 203a in the vertical state, the entry of gas will push the movable plate 203b to move upward, so that during the swinging of the sealed shell 203a, the sealing plate 203c can always maintain a horizontal height, so that the stretching equipment can increase the friction between the equipment and the polypropylene by repeatedly swinging left and right during the process of processing the polypropylene, and the repeated friction and squeezing are more helpful for the stretching rollers 104 on both sides to stretch the polypropylene through the external equipment, so as to avoid the polypropylene material from breaking during the stretching process.

[0060] The pressure mechanism 206 and the transmission mechanism 208 are provided so that the swing mechanism 203 can be smoother during the swinging process, thereby reducing noise and the probability of equipment damage.

[0061] Example 3

[0062] Combined with Figure 5 and attached Figure 6, it is concluded that the jet mechanism 205 includes a jet roller 205a, a plurality of through holes 205b are formed outside the jet roller 205a, the two ends of the jet roller 205a are respectively connected to the two second rotating shafts 204c, the pressure mechanism 206 includes a sleeve 206a, a slide plate 206b is slidably connected inside the sleeve 206a, the sleeve 206a and the slide plate 206b are both arc-shaped, a push plate 206c is fixedly connected to the other side of the slide plate 206b, and the lower side of the sleeve 206a is fixedly connected to the lower side of the inner wall of the body shell 101. The other side of the push plate 206c overlaps with the sealed shell 203a, and the transmission mechanism 208 includes a first telescopic tube 208a. The number of the first telescopic tubes 208a is four, and the bottom ends of the four first telescopic tubes 208a are respectively connected to two connecting sleeves 208b, and the two connecting sleeves 208b are respectively connected to four transmission tubes 208c. The telescopic tube is arc-shaped, and the top end of the first telescopic tube 208a is connected to the sealed shell 203a, and the other end of the transmission tube 208c is connected to the sliding sleeve 206a.

[0063] The air inlet of the heating component 301 is connected to the first duct 302, the first duct 302 is respectively connected to four air inlet pipes 303, the two air inlet pipes 303 located on one side are connected to the same air inlet hood 304, the exhaust port of the heating component 301 is connected to the second duct 305, the other end of the second duct 305 is connected to the second telescopic tube 306, the second telescopic tube 306 is a multi-section telescopic tube, the other end of the second telescopic tube 306 is connected to one end of the tee 207, the heating component 301 is fixedly connected to the lower part of the inner wall of the body shell 101, the heating component 301 includes an air pump 301a, the exhaust port of the air pump 301a is connected to the heater 301b, the air inlet of the air pump 301a is connected to the first duct 302, and the exhaust port of the heater 301b is connected to the second duct 305.

[0064] In this embodiment: since the air pump 301a will extract the gas in the air intake hood 304 through the first conduit 302 and the air intake pipe 303 during operation, and the air intake hood 304 is arranged on both sides of the inner wall of the body shell 101, at the same time, after the polypropylene material is installed, the air intake hood 304 will be located below the polypropylene material, so that the hot air that escapes while the jet roller 205a discharges the gas will float up, and because it is blocked by the polypropylene material above, the heat will drift to both sides. At this time, the air intake hood 304 will extract the gas into the air pump 301a again and transport it to the heater 301b, so that the device not only realizes the secondary utilization of heat, reduces the energy consumption of the heater 301b for heating the gas, but also avoids the pollution of the air and the environment caused by heat escape, thereby improving the safety when using the device.

[0065] The working principle of the present invention is as follows: when using the stretching device, the disassembly bracket 102, the fixed bracket 103 and the stretching roller 104 need to be assembled, and after the assembly is completed, the heated polypropylene material is fixed outside the stretching roller 104, and then the fixed bracket 103 is fixed outside the machine body shell 101 through the disassembly bracket 102, and then the polypropylene material is passed through the top of the machine body shell 101 and fixed outside the stretching roller 104 on the other side;

[0066] The first rotating shaft 202 is driven to rotate by an external driver, so that the first rotating shaft 202 rotates 45° to the left and then resets and rotates 45° to the right, so that the swing mechanism 203 above the first rotating shaft 202 is in a state of continuous left-right swinging. When the sealed shell 203a swings to the left, it will squeeze the push plate 206c on the left, so that the left push plate 206c pushes the slide plate 206b to inject the gas in the sliding sleeve 206a into the sealed shell 203a through the transmission pipe 208c and the first telescopic pipe 208a, so that the air pressure in the sealed shell 203a increases and pushes the movable plate 203b to move upward. At this time, as the swing amplitude of the sealed shell 203a increases, more gas will enter the sealed shell 203a, and because the height of the movable plate 203b in the swinging state will be lower than the height of the sealed shell 203a in the vertical state, the entry of gas will push the movable plate 203b to move upward, so that the sealing plate 203c can always maintain a horizontal height during the swinging of the sealed shell 203a.

[0067] When the polypropylene material is rubbed and stretched by the jet roller 205a, the heater 301b and the air pump 301a need to be started, so that the air pump 301a extracts gas and injects gas into the heater 301b at the same time, and the heated gas is transmitted to the second telescopic tube 306 along the second conduit 305. Since the second telescopic tube 306 is connected to the tee 207, and the tee 207 is connected to the second rotating shaft 204c and the jet roller 205a, the heated gas can be discharged through the through hole 205b on the surface of the jet roller 205a after entering the jet roller 205a, so as to be evenly sprayed on the surface of the polypropylene material;

[0068] During operation, the air pump 301a will draw gas from the air intake hood 304 through the first duct 302 and the air intake pipe 303, and the air intake hood 304 is arranged on both sides of the inner wall of the body shell 101. At the same time, after the polypropylene material is installed, the air intake hood 304 will be located below the polypropylene material, so that when the jet roller 205a discharges gas, the dissipated hot air will float up. Since it is blocked by the polypropylene material above, the heat will drift to both sides. At this time, the air intake hood 304 will draw the gas into the air pump 301a again and transport it to the heater 301b.

[0069] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications that still fall within the scope of the claims.

[0070] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0071] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A polypropylene biaxial stretching device with uniform roughness, characterized in that: include, The body structure (100) includes a body shell (101) capable of supporting polypropylene; The stretching mechanism (200) has a bottom fixedly connected to the body shell (101), and comprises a swing mechanism (203), a connecting mechanism (204), and an air jet mechanism (205), wherein the swing mechanism (203) drives the air jet mechanism (205) to swing via the connecting mechanism (204), and the air jet mechanism (205) is in contact with polypropylene, wherein the air jet mechanism (205) is provided with a plurality of through holes (205b); and The air delivery mechanism (300) is supported by the machine body shell (101), and comprises an air pump (301a), a first conduit (302) arranged at the air inlet of the air pump (301a), an air inlet pipe (303) and an air inlet cover (304), a heating component (301) arranged at the air outlet of the air pump (301a), a second conduit (305), and a second telescopic tube (306), wherein the second telescopic tube (306) is in communication with the air injection mechanism (205), and the air inlet cover (304) is arranged on the machine body shell. (101) on both sides of the inner wall and located below the polypropylene, wherein the connecting mechanism (204) includes a bracket plate (204a), the bracket plate (204a) is connected to the swing mechanism (203), a second rotating shaft (204c) is sleeved in the bracket plate (204a), and an air hole is opened at one end of the second rotating shaft (204c); one end of the second rotating shaft (204c) is connected to the jet mechanism (205), and the other end of the second rotating shaft (204c) is connected to the second telescopic tube (306); The swing mechanism (203) moves in a telescopic manner as the jet mechanism (205) moves left and right, thereby allowing the jet mechanism (205) to remain in contact with the polypropylene.

2. The polypropylene biaxial stretching device with uniform roughness as claimed in claim 1, characterized in that: The stretching mechanism (200) comprises a first rotating shaft (202), and the swinging mechanism (203) comprises a sealed shell (203a) and a movable plate (203b), wherein the movable plate (203b) is capable of sliding in the sealed shell (203a), the lower part of the sealed shell (203a) is fixedly connected to the first rotating shaft (202), and the upper part of the movable plate (203b) is fixedly connected to the connecting mechanism (204).

3. The polypropylene biaxial stretching device with uniform roughness as claimed in claim 2, characterized in that: The swing mechanism (203) further comprises a sealing plate (203c) and a limiting rod (203d), wherein the limiting rod (203d) is fixedly connected to two sides of the inner wall of the sealing shell (203a), the lower part of the movable plate (203b) is fixedly connected to the upper part of the sealing plate (203c), and the lower part of the sealing plate (203c) overlaps the limiting rod (203d).

4. The polypropylene biaxial stretching device with uniform roughness as claimed in claim 3, characterized in that: The invention also includes a pressure mechanism (206) and a transmission mechanism (208), wherein the lower part of the transmission mechanism (208) and the bottom of the pressure mechanism (206) are fixedly connected to the lower part of the inner wall of the machine body shell (101), wherein the sealed shell (203a) and the pressure mechanism (206) are overlapped, the sealed shell (203a) and the transmission mechanism (208) are connected, the pressure mechanism (206) and the transmission mechanism (208) are connected, and gas is arranged in the pressure mechanism (206), and the sealed shell (203a) can squeeze the pressure mechanism (206), so that the gas passes through the transmission mechanism (208) and enters the sealed shell (203a), thereby pushing the sealing plate (203c) and the movable plate (203b) to move upward.

5. The polypropylene biaxial stretching device with uniform roughness as claimed in claim 4, characterized in that: The support plate (204a) is fixedly connected above the movable plate (203b).

6. The polypropylene biaxial stretching device with uniform roughness as claimed in claim 5, characterized in that: The pressure mechanism (206) comprises a sliding sleeve (206a), a sliding plate (206b) and a push plate (206c); the lower part of the sliding sleeve (206a) is fixedly connected to the lower part of the inner wall of the machine body shell (101); one side of the sliding plate (206b) can slide in the sliding sleeve (206a); the other side of the sliding plate (206b) is fixedly connected to the push plate (206c); the other side of the push plate (206c) is overlapped with the sealing shell (203a); wherein the sliding sleeve (206a) contains gas.

7. The polypropylene biaxial stretching device with uniform roughness as claimed in claim 6, characterized in that: The transmission mechanism (208) comprises a first telescopic tube (208a), one end of the first telescopic tube (208a) is connected to the sealing shell (203a), and the bottom end of the first telescopic tube (208a) is connected to the connecting sleeve (208b), and the connecting sleeve (208b) is connected to the transmission tube (208c); the other end of the transmission tube (208c) is connected to the sliding sleeve (206a).

8. The polypropylene biaxial stretching device with uniform roughness as claimed in claim 1, characterized in that: The first conduit (302) is respectively connected to four air intake pipes (303); the two air intake pipes (303) located on one side are connected to the same air intake cover (304); one end of the second conduit (305) is connected to a second telescopic tube (306); the second telescopic tube (306) is a multi-section telescopic tube; the other end of the second telescopic tube (306) is connected to the jet mechanism (205) via a tee (207).

9. The polypropylene biaxial stretching device with uniform roughness as claimed in claim 1, characterized in that: The machine body mechanism (100) further comprises four disassembly brackets (102), a fixed bracket (103) and a stretching roller (104), wherein the stretching roller (104) is connected to the fixed bracket (103), the four disassembly brackets (102) are respectively fixedly connected to two sides of the machine body shell (101), and the four disassembly brackets (102) are fixedly connected to the outside of the fixed brackets (103), and the two fixed brackets (103) located on one side are connected to the same stretching roller (104).

10. A process for biaxial stretching of polypropylene with uniform roughness, using the biaxial stretching device for polypropylene with uniform roughness as claimed in any one of claims 1 to 9, characterized in that: The stretching steps include: S1. Heat the polypropylene material in a heating box until it reaches 40-100°C, then remove it and fix it in a stretching device for stretching; S2, cooling and shaping the polypropylene material after the primary stretching, maintaining the temperature at 10-20°C, and performing secondary stretching when the temperature of the polypropylene is maintained at room temperature; S3. The polypropylene material is heated again in a heating box. After being heated to 40-80°C, it is removed and fixed in a stretching device for secondary stretching treatment.

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