Polypropylene elastic fiber preparation device
By introducing a crushing component, a screening component, and a recycling component into the polypropylene elastic fiber preparation device, the precise crushing, screening, and recycling of raw materials are achieved, solving the problem of insufficient raw material processing in traditional devices, improving fiber performance consistency and production efficiency, and reducing resource waste and costs.
Patent Information
- Application Number
- CN202520411972.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Traditional polypropylene elastic fiber preparation equipment suffers from insufficient crushing, inaccurate screening, and a lack of recycling and reuse mechanisms in raw material processing, resulting in inconsistent fiber properties, low product qualification rate, and resource waste.
A polypropylene elastic fiber preparation device was designed, which includes a crushing component, a screening component, and a recycling component. Through the cooperation of a transmission belt and a vibrating motor, the device can achieve precise crushing, screening, and recycling of raw materials, ensuring uniform particle size and efficient recovery.
It improves the uniformity and reactivity of raw materials, enhances product quality and production efficiency, reduces resource waste and production costs, and strengthens the market competitiveness of the equipment.
Smart Images

Figure CN223790815U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of polypropylene elastic fiber preparation device, and in particular to a polypropylene elastic fiber preparation device. Background Technology
[0002] In the production of polypropylene elastic fibers, the pretreatment of raw materials has a crucial impact on fiber quality and production efficiency. Traditional polypropylene elastic fiber preparation equipment has many shortcomings in raw material processing. Insufficient crushing of raw materials leads to difficulties in uniform mixing and reaction during subsequent processing, affecting the consistency of fiber performance. During screening, materials of different particle sizes cannot be effectively separated, resulting in inconsistent quality of raw materials entering subsequent processes and reducing the product qualification rate. Moreover, there is a lack of efficient recycling and reuse mechanisms for unqualified raw materials, leading to resource waste and increased production costs. Therefore, developing a polypropylene elastic fiber preparation device that can efficiently crush, accurately screen, and has good recycling capabilities is of significant practical importance. Based on this, a polypropylene elastic fiber preparation device is proposed to solve the above problems. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a polypropylene elastic fiber preparation device. This device solves the problems of insufficient raw material crushing, which leads to difficulty in uniform mixing and reaction during subsequent processing, affecting the consistency of fiber performance. During the screening process, it is impossible to effectively separate materials of different particle sizes, resulting in inconsistent quality of raw materials entering subsequent processes and reducing the product qualification rate. Moreover, there is a lack of an efficient recycling and reuse mechanism for unqualified raw materials, causing resource waste and increased production costs.
[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a polypropylene elastic fiber preparation device, comprising a device body, the device body being provided with a connecting mechanism, the connecting mechanism including a material return component disposed on the left section of the device body, a material breaking component disposed on the upper section of the device body, and a material screening component disposed on the lower section of the device body;
[0005] The screening assembly includes a vibrating motor fixedly installed on the inner wall of the device body. A screening plate is fixedly installed inside the vibrating motor. A hopper is fixedly installed on the inner wall of the device body. A return pipe is fixedly connected to the left side of the hopper. A connecting cylinder is connected to the bottom of the hopper. A receiving plate is fixedly connected to the outer wall of the right side of the device body. A second motor is fixedly installed on the top of the receiving plate. A drive shaft is fixedly connected to the output end of the second motor. A second transmission wheel is fixedly connected to the outer wall of the drive shaft. A pushing spiral blade is fixedly connected to the inner outer wall of the drive shaft.
[0006] A further improvement is that the material return assembly includes a mounting plate fixedly connected to the outer wall of the device body. A motor is fixedly mounted on the top of the mounting plate. A rotating shaft is fixedly connected to the output end of the motor. A bevel gear is fixedly connected to the outer wall of the rotating shaft. A bevel gear meshes with a bevel gear. A transmission shaft is fixedly connected to the inner wall of the bevel gear. A connecting rod is fixedly connected to the top of the device body. A material cylinder is fixedly connected to the top of the connecting rod.
[0007] A further improvement is that the crushing assembly includes a transmission belt, a transmission wheel 1 is connected to the transmission belt, a transmission shaft 2 is fixedly connected to the inner wall of the transmission wheel 1, a hopper is rotatably connected to the outer wall of the transmission shaft 2, a meshing gear is fixedly connected to the outer wall of the right section of the transmission shaft 2, and crushed sepals are fixedly connected to the outer wall of the middle section of the transmission shaft 2.
[0008] A further improvement is that the screening plate is inclined from right to left, and the bottom of the screening plate is located at the top of the return pipe. The drive shaft is rotatably connected to the inner wall of the device body. The receiving plate is fixed to the outer wall of the right side of the device body, providing an installation position for the second motor. After the second motor starts, the drive shaft at its output end rotates. The drive shaft is rotatably connected to the inner wall of the device body to ensure the stability of the rotation. The transmission wheel two, which is fixedly connected to the outer wall of the drive shaft, transmits power to the crushing component through a transmission belt. The pushing spiral blade, which is fixedly connected to the inner outer wall of the drive shaft, can push the material on the screening plate when needed.
[0009] A further improvement is that the drive shaft is rotatably connected to the mounting plate, and the other end of the material cylinder is located at the top of the hopper; the bevel gear 1, which is fixedly connected to the outer wall of the shaft, rotates accordingly, and the bevel gear 1 meshes with the bevel gear 2, transmitting power to the bevel gear 2; the drive shaft 1, which is fixedly connected to the inner wall of the bevel gear 2, rotates on the mounting plate, realizing the conversion and transmission of power.
[0010] A further improvement is that the transmission belt is connected to the second transmission wheel, and the hopper is connected to the top of the device body; the transmission belt drives between the second transmission wheel and the first transmission wheel, transmitting the power output from the second motor in the screening assembly to the crushing assembly; the second transmission shaft, which is fixedly connected to the inner wall of the first transmission wheel, rotates under the action of power; and the hopper, which is rotatably connected to the outer wall of the second transmission shaft, is used to receive raw materials from the return assembly or the initial addition.
[0011] A further improvement is that the return pipe is connected to the material cylinder; under the action of vibration, the raw materials that meet the particle size requirements fall through the screen holes of the screening plate and enter the discharge hopper. The connecting cylinder at the bottom of the discharge hopper transports the qualified raw materials to the subsequent process, while the raw materials that do not meet the particle size requirements move to the left on the screening plate and finally fall into the return pipe, and are transported to the return cylinder for further processing through the return pipe.
[0012] By employing the above technical solution, this utility model provides a polypropylene elastic fiber preparation device, which has at least the following beneficial effects:
[0013] 1. The material crushing component and screening component of this utility model work closely together to achieve precise processing of raw materials. In the material crushing component, the transmission belt transmits power, causing the transmission shaft to drive the crushing calyx to fully crush the raw material, ensuring uniform particle size. The screening component uses a vibrating motor to ensure effective screening by the screening plate. Only raw materials with qualified particle size pass through the hopper and connecting cylinder to enter the subsequent process. This precise processing method ensures the quality of raw materials from the source, laying the foundation for producing polypropylene elastic fibers with stable performance and superior quality, and enhancing the market competitiveness of the product.
[0014] 2. In this invention, the material return assembly and the screening assembly work together to create an efficient raw material circulation system. The screening assembly, driven by a vibrating motor, precisely filters out raw materials that do not meet the particle size requirements, allowing them to flow into the material cylinder of the material return assembly through the return pipe. Motor 1 drives the rotating shaft, which, through bevel gear 1 and bevel gear 2, transports the recycled raw materials back to the crushing assembly. This circulation process avoids raw material waste, reduces downtime for replenishing raw materials, and enables the device to operate continuously and efficiently, greatly improving the production efficiency of polypropylene elastic fibers. Attached Figure Description
[0015] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.
[0016] In the attached diagram:
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the oblique side structure of this utility model;
[0019] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;
[0020] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B;
[0021] Figure 5 This is a partial cross-sectional structural diagram of the present invention.
[0022] In the diagram: 1. Device body; 2. Connecting mechanism; 21. Return assembly; 211. Mounting plate; 212. Motor 1; 213. Rotating shaft; 214. Bevel gear 1; 215. Bevel gear 2; 216. Drive shaft 1; 217. Connecting rod; 218. Material cylinder; 22. Crushing assembly; 221. Drive belt; 222. Drive wheel 1; 223. Drive shaft 2; 224. Hopper; 225. Meshing gear; 226. Crushed sepals; 23. Screening assembly; 231. Vibrating motor; 232. Screening plate; 233. Drop hopper; 234. Return pipe; 235. Connecting cylinder; 236. Receiving plate; 237. Motor 2; 238. Drive shaft; 239. Drive wheel 2; 2310. Pushing spiral blade. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example
[0024] Insufficient crushing of raw materials leads to difficulties in uniform mixing and reaction during subsequent processing, affecting the consistency of fiber performance. During sieving, materials of different particle sizes cannot be effectively separated, resulting in inconsistent raw material quality entering subsequent processes and reducing product yield. Furthermore, the lack of an efficient recycling mechanism for substandard raw materials causes resource waste and increased production costs. This embodiment provides a polypropylene elastic fiber preparation apparatus; please refer to... Figures 1-5 An embodiment provides a polypropylene elastic fiber preparation device, including a device body 1, a connecting mechanism 2, a return component 21 disposed on the left side of the device body 1, a crushing component 22 disposed on the upper side of the device body 1, and a screening component 23 disposed on the lower side of the device body 1; the screening component 23 includes a vibration motor 231 fixedly installed on the inner wall of the device body 1, a screening plate 232 fixedly installed on the inner side of the vibration motor 231, a discharge hopper 233 fixedly installed on the inner wall of the device body 1, a return pipe 234 fixedly connected to the left side of the discharge hopper 233, a connecting cylinder 235 connected to the bottom of the discharge hopper 233, a receiving plate 236 fixedly connected to the outer wall of the right side of the device body 1, a second motor 237 fixedly installed on the top of the receiving plate 236, a drive shaft 238 fixedly connected to the output end of the second motor 237, a transmission wheel 239 fixedly connected to the outer wall of the drive shaft 238, and a pushing spiral blade 2310 fixedly connected to the inner outer wall of the drive shaft 238.
[0025] In this embodiment, the screening assembly 23 realizes the screening and conveying of raw materials. The vibration motor 231 is fixedly installed on the inner wall of the device body 1. After starting, it generates vibration, which drives the inner screening plate 232 to vibrate. The screening plate 232 is inclined from right to left to facilitate the material to move to the left during vibration. The raw material after being crushed by the crushing assembly 22 enters the screening plate 232. Under the action of vibration, the raw material that meets the particle size requirements falls through the screen holes of the screening plate 232 and enters the discharge hopper 233. The connecting cylinder 235 connected to the bottom of the discharge hopper 233 conveys the qualified raw material to the subsequent process. The raw material that does not meet the particle size requirements moves to the left on the screening plate 232 and finally falls into the discharge hopper 233. The return pipe 234 conveys the return cylinder 218 for further processing. The receiving plate 236 is fixed to the outer right side of the device body 1, providing an installation position for the second motor 237. After the second motor 237 is started, its output drive shaft 238 rotates. The drive shaft 238 is rotatably connected to the inner wall of the device body 1 to ensure the stability of the rotation. The transmission wheel 239 fixedly connected to the outer wall of the drive shaft 238 transmits power to the crushing component 22 through the transmission belt 221. The pusher auger 2310 fixedly connected to the inner outer wall of the drive shaft 238 can push the material on the screening plate 232 when needed, accelerating the screening process and improving screening efficiency.
[0026] Furthermore, the screening plate 232 is inclined from right to left, and the bottom of the screening plate 232 is located at the top of the return pipe 234. The drive shaft 238 is rotatably connected to the inner wall of the device body 1. The return pipe 234 is connected to the material cylinder 218.
[0027] Furthermore, the raw material after being crushed by the crushing component 22 enters the screening plate 232. Under the action of vibration, the raw material that meets the particle size requirements falls through the screen holes of the screening plate 232 and enters the discharge hopper 233. The connecting cylinder 235 connected to the bottom of the discharge hopper 233 transports the qualified raw material to the subsequent process. The raw material that does not meet the particle size requirements moves to the left on the screening plate 232 and finally falls into the return pipe 234. It is then transported to the return cylinder 218 for further processing through the return pipe 234. Example
[0028] Based on Embodiment 1, the material return assembly 21 includes a mounting plate 211 fixedly connected to the outer wall of the device body 1. A motor 212 is fixedly mounted on the top of the mounting plate 211. A rotating shaft 213 is fixedly connected to the output end of the motor 212. A bevel gear 214 is fixedly connected to the outer wall of the rotating shaft 213. A bevel gear 215 meshes with the bevel gear 214. A transmission shaft 216 is fixedly connected to the inner wall of the bevel gear 215. A connecting rod 217 is fixedly connected to the top of the device body 1. A material cylinder 218 is fixedly connected to the top of the connecting rod 217. The crushing assembly 22 includes a transmission belt 221. A transmission wheel 222 is driven by the transmission belt 221. A transmission shaft 223 is fixedly connected to the inner wall of the transmission wheel 222. A hopper 224 is rotatably connected to the outer wall of the transmission shaft 223. A meshing gear 225 is fixedly connected to the outer wall of the right section of the transmission shaft 223. A crushed calyx 226 is fixedly connected to the outer wall of the middle section of the transmission shaft 223.
[0029] In this embodiment, the material recovery assembly 21 realizes the recovery and re-transportation of raw materials. The mounting plate 211 is fixedly connected to the outer wall of the device body 1, providing a stable mounting base for the motor 212. After the motor 212 starts, its output end drives the rotating shaft 213 to rotate. The bevel gear 214 fixedly connected to the outer wall of the rotating shaft 213 rotates accordingly. The bevel gear 214 meshes with the bevel gear 215, transmitting power to the bevel gear 215. The transmission shaft 216 fixedly connected to the inner wall of the bevel gear 215 rotates on the mounting plate 211, realizing the conversion and transmission of power. The connecting rod 217 is fixed to the top of the device body 1, and the material cylinder 218 connected to its top is used to store the recovered raw materials. When it is necessary to re-transport the recovered raw materials to the crushing assembly 22 for further processing, the rotation of the transmission shaft 216 drives the material in the material cylinder 218 to be transported. The other end of the material cylinder 218 is set at the top of the hopper 224, so that the raw materials can smoothly enter the hopper 224. The material return pipe 234 connects to the material cylinder 218, using The material that does not meet the requirements after being screened by the screening component 23 is conveyed to the return cylinder 218 to realize the recycling of the material. The crushing component 22 crushes the material. The transmission belt 221 drives between the transmission wheel 239 and the transmission wheel 222, transmitting the power output from the motor 237 in the screening component 23 to the crushing component 22. The transmission shaft 223, which is fixedly connected to the inner wall of the transmission wheel 222, rotates under the action of power. The hopper 224, which is rotatably connected to the outer wall of the transmission shaft 223, is used to receive the material from the return component 21 or the initially added material. The meshing gear 225, which is fixedly connected to the outer wall of the right section of the transmission shaft 223, can cooperate with other components to further adjust the speed of the transmission shaft 223 or realize other functions. The crushing calyx 226, which is fixedly connected to the outer wall of the middle section of the transmission shaft 223, crushes the material in the hopper 224 as the transmission shaft 223 rotates, crushing larger particles of material into smaller particles suitable for subsequent processing, thereby improving the uniformity and reactivity of the material.
[0030] Furthermore, the drive shaft 216 is rotatably connected to the mounting plate 211, and the other end of the material cylinder 218 is located on the top of the hopper 224; the drive belt 221 is connected to the drive wheel 239, and the hopper 224 is connected to the top of the device body 1.
[0031] Furthermore, the other end of the material cylinder 218 is located at the top of the hopper 224, allowing the raw materials to smoothly enter the hopper 224. The return pipe 234 connects to the material cylinder 218 and is used to transport the unqualified raw materials screened out by the screening component 23 back to the material cylinder 218, realizing the recycling of raw materials. The crushing component 22 crushes the raw materials. The transmission belt 221 drives between the second transmission wheel 239 and the first transmission wheel 222, transmitting the power output by the second motor 237 in the screening component 23 to the crushing component 22. The second transmission shaft 223, which is fixedly connected to the inner wall of the first transmission wheel 222, rotates under the action of power. The hopper 224, which is rotatably connected to the outer wall of the second transmission shaft 223, is used to receive the raw materials from the return component 21 or the initially added raw materials. The meshing gear 225, which is fixedly connected to the outer wall of the right section of the second transmission shaft 223, can cooperate with other components to further adjust the speed of the second transmission shaft 223 or realize other functions.
[0032] Working principle: The material recovery assembly 21 realizes the recycling and re-transportation of raw materials. The mounting plate 211 is fixedly connected to the outer wall of the device body 1, providing a stable mounting base for the motor 212. After the motor 212 starts, its output end drives the rotating shaft 213 to rotate. The bevel gear 214 fixedly connected to the outer wall of the rotating shaft 213 rotates accordingly. The bevel gear 214 meshes with the bevel gear 215, transmitting power to the bevel gear 215. The transmission shaft 216 fixedly connected to the inner wall of the bevel gear 215 rotates on the mounting plate 211, realizing the conversion and transmission of power. The connecting rod 217 is fixed to the top of the device body 1, and the top of the material cylinder 218 is used to store the recycled raw materials. When the recycled raw materials need to be transported back to the crushing component 22 for further processing, the rotation of the drive shaft 216 drives the material in the material cylinder 218 to be transported. The other end of the material cylinder 218 is set at the top of the hopper 224 so that the raw materials can enter the hopper 224 smoothly. The return pipe 234 is connected to the material cylinder 218 and is used to transport the raw materials that do not meet the requirements screened out by the screening component 23 back to the material cylinder 218 to realize the recycling of raw materials.
[0033] The crushing assembly 22 crushes the raw materials. The transmission belt 221 transmits power between the second transmission wheel 239 and the first transmission wheel 222, transferring the power output from the second motor 237 in the screening assembly 23 to the crushing assembly 22. The second transmission shaft 223, which is fixedly connected to the inner wall of the first transmission wheel 222, rotates under the action of power. The hopper 224, which is rotatably connected to the outer wall of the second transmission shaft 223, is used to receive the raw materials from the return assembly 21 or the initially added raw materials. The meshing gear 225, which is fixedly connected to the outer wall of the right section of the second transmission shaft 223, can cooperate with other components to further adjust the speed of the second transmission shaft 223 or achieve other functions. The crushing calyx 226, which is fixedly connected to the outer wall of the middle section of the second transmission shaft 223, crushes the raw materials in the hopper 224 as the second transmission shaft 223 rotates, crushing larger particles of raw materials into smaller particles suitable for subsequent processing, thereby improving the uniformity and reactivity of the raw materials.
[0034] The screening assembly 23 performs raw material screening and conveying. The vibrating motor 231 is fixedly installed on the inner wall of the device body 1. After starting, it generates vibration, which drives the inner screening plate 232 to vibrate. The screening plate 232 is inclined from right to left to facilitate the material to move to the left during vibration. The raw material after being crushed by the crushing assembly 22 enters the screening plate 232. Under the action of vibration, the raw material that meets the particle size requirements falls through the screen holes of the screening plate 232 and enters the discharge hopper 233. The connecting cylinder 235 connected to the bottom of the discharge hopper 233 conveys the qualified raw material to the subsequent process. The raw material that does not meet the particle size requirements moves to the left on the screening plate 232 and finally falls into the return pipe 2. 34. The material is conveyed to the return cylinder 218 for further processing through the return pipe 234; the receiving plate 236 is fixed to the outer right side of the device body 1, providing an installation position for the second motor 237; after the second motor 237 is started, the drive shaft 238 at its output end rotates, and the drive shaft 238 is rotatably connected to the inner wall of the device body 1 to ensure the stability of rotation; the transmission wheel 239 fixedly connected to the outer wall of the drive shaft 238 transmits power to the crushing component 22 through the transmission belt 221; the pusher spiral blade 2310 fixedly connected to the inner outer wall of the drive shaft 238 can push the material on the screening plate 232 when needed, accelerating the screening process and improving screening efficiency.
[0035] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for the production of polypropylene elastic fibres, comprising a device body (1), characterised in that: The device body (1) is provided with a connecting mechanism (2), the connecting mechanism (2) includes a back material assembly (21) arranged on the left section of the device body (1), the upper section of the device body (1) is provided with a broken material assembly (22), and the lower section of the device body (1) is provided with a screening material assembly (23); The screening material assembly (23) includes a vibration motor (231) fixedly installed on the inner wall of the device body (1), a screening plate (232) is fixedly installed on the inner side of the vibration motor (231), a material falling hopper (233) is fixedly installed on the inner wall of the device body (1), a back material pipe (234) is fixedly connected to the left side of the material falling hopper (233), a connecting barrel (235) is communicatively arranged at the bottom of the material falling hopper (233), a receiving plate (236) is fixedly connected to the right outer wall of the device body (1), a motor two (237) is fixedly installed on the top of the receiving plate (236), a drive shaft (238) is fixedly connected to the output end of the motor two (237), a transmission wheel two (239) is fixedly connected to the outer wall of the drive shaft (238), and a pushing spiral blade (2310) is fixedly connected to the inner side of the drive shaft (238).
2. The polypropylene elastic fiber preparation device according to claim 1, wherein: The back material assembly (21) includes a mounting plate (211) fixedly connected to the outer wall of the device body (1), a motor one (212) is fixedly installed on the top of the mounting plate (211), a rotating shaft (213) is fixedly connected to the output end of the motor one (212), a bevel gear one (214) is fixedly connected to the outer wall of the rotating shaft (213), a bevel gear two (215) is engaged, a transmission shaft one (216) is fixedly connected to the inner wall of the bevel gear two (215), a connecting rod (217) is fixedly connected to the top of the device body (1), and a material cylinder (218) is fixedly connected to the top of the connecting rod (217).
3. The polypropylene elastic fiber preparation device according to claim 1, wherein: The broken material assembly (22) includes a transmission belt (221), the transmission belt (221) is drivingly connected with a transmission wheel one (222), the transmission wheel one (222) is fixedly connected with a transmission shaft two (223) on the inner wall, a material hopper (224) is rotatably connected to the outer wall of the transmission shaft two (223), an engagement gear (225) is fixedly connected to the outer wall of the right section of the transmission shaft two (223), and a broken petal (226) is fixedly connected to the outer wall of the middle section of the transmission shaft two (223).
4. The polypropylene elastic fiber preparation device according to claim 1, wherein: The screening plate (232) is arranged from right to left, and the bottom of the screening plate (232) is arranged on the top of the back material pipe (234), and the drive shaft (238) is rotatably connected to the inner wall of the device body (1).
5. The polypropylene elastic fiber preparation device according to claim 2, wherein: The transmission shaft one (216) is rotatably connected to the mounting plate (211), and the other end of the material cylinder (218) is arranged on the top of the material hopper (224).
6. The polypropylene elastic fiber preparation device according to claim 3, wherein: The transmission belt (221) is drivingly connected to the transmission wheel two (239), and the material hopper (224) is communicatively arranged on the top of the device body (1).
7. The polypropylene elastic fiber preparation device according to claim 1, wherein: The back material pipe (234) is communicatively arranged in the material cylinder (218).