PU synthetic leather processing drying equipment
By employing external air and steam exchange and airflow control in the drying device, the problem of uneven coating distribution was solved, achieving uniformity and smoothness of the coating.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN ALLIANCE NEW MATERIAL DEV CO LTD
- Filing Date
- 2025-09-06
- Publication Date
- 2026-08-04
AI Technical Summary
When drying PU synthetic leather coatings, the hot air blowing in existing drying equipment can easily disrupt the uniform distribution of the coating, resulting in wavy patterns and uneven coating.
Gas exchange is achieved by exchanging external air with steam inside the ventilation chamber. External air is preliminarily dried and filtered by an air pump and a drying cylinder before being introduced into the ventilation chamber, while steam inside the drying chamber is discharged. Airflow is controlled by a drying plate and a baffle rod to maintain a stable temperature and ensure uniform coating distribution.
It achieves uniform coating distribution and complete drying, avoids the appearance of waviness, and ensures the uniformity and smoothness of the coating.
Smart Images
Figure CN224586285U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of synthetic leather processing technology, and in particular to a drying device for processing PU synthetic leather. Background Technology
[0002] Artificial leather made from PU resin and non-woven fabric is called PU synthetic leather (or simply synthetic leather). It is a plastic product that simulates the composition and structure of natural leather and can be used as a substitute for it. It is usually made of impregnated non-woven fabric as the mesh layer and microporous polyurethane layer as the grain layer. Its front and back are very similar to leather and have a certain degree of breathability. It is closer to natural leather than ordinary artificial leather and has a wide range of uses.
[0003] There are two manufacturing methods for PU synthetic leather: dry and wet. The corresponding production processes can be divided into dry production processes and wet production processes. The dry production methods mainly include direct coating and release paper methods. Both methods require the use of a drying device to dry the coating. Conventional ovens often use hot air to assist in drying. However, when hot air blows on the coating surface of the base fabric, it will damage the uniform distribution of the coating on the base fabric, which can easily cause wavy patterns in the uncured coating, affecting the uniformity and smoothness of the coating. Utility Model Content
[0004] The purpose of this invention is to provide a drying device for processing PU synthetic leather, which can ensure that the temperature remains relatively stable, maintain the uniform distribution of the coating after scraping until it is completely dried, and prevent wavy patterns from appearing, thus ensuring the uniformity and smoothness of the coating.
[0005] To achieve the above objectives, a drying device for processing PU synthetic leather is provided, comprising: a drying chamber, an electric heating base fitted into the bottom inner side of the drying chamber, supports symmetrically fixedly connected to the bottom of the drying chamber, and limiting roller shafts rotatably connected to the top of the opposite sides of the supports, a support roller shaft slidably connected through the center of the inner side of the drying chamber in a front-to-back direction, bushings rotatably fitted to the outer sides of both ends of the support roller shaft and the limiting roller shaft, the bushings being fitted and fixedly fitted to the drying chamber and the supports, a base fabric rollingly fitted to the upper side of the limiting roller shaft and the support roller shaft, the base fabric being coated with a slurry, a rectangular through groove opened at the center of the top of the drying chamber, a ventilation chamber mounted directly above the rectangular through groove, the bottom of the ventilation chamber being connected and fixedly connected to the drying chamber, an exhaust port being connected and fixedly connected to the center of the right side of the ventilation chamber, and a... An air pump is provided, with its bottom fixedly connected to the drying chamber. A guide pipe is fixedly connected to the right output end of the air pump, and the right end of the guide pipe is fixedly connected to the ventilation chamber. A drying cylinder is fixedly engaged on the outside of the rear input end of the air pump. By opening a ventilation chamber at the top of the drying chamber and using the air pump in conjunction with the drying cylinder to preliminarily dry and filter the outside air before introducing it into the ventilation chamber, the steam rising from inside the drying chamber is continuously discharged from the exhaust port. Since the gas exchange operation is carried out between the outside air and the rising steam in the ventilation chamber, the airflow change inside the drying chamber is small during the ventilation process. Most of the rising steam with high water content is carried away, so the internal temperature change is also small and the temperature is relatively stable. The uniform distribution of the coating after scraping can be maintained until it is completely dried without the appearance of wavy lines, ensuring the uniformity and smoothness of the coating.
[0006] According to the aforementioned drying equipment for processing PU synthetic leather, the inner side of the drying cylinder is filled with several porous drying plates at equal intervals in the front-to-back direction. This allows for multi-layer drying and filtration of externally introduced gas.
[0007] According to the drying equipment for PU synthetic leather processing, a frame is mounted on the outer bottom of the rectangular channel. The top of the frame is engaged and fixed to the drying chamber. Several baffle rods are equidistantly fitted and fixed to the inner side of the frame. These baffle rods obstruct and interfere with the vertical upward airflow, reducing its overall velocity.
[0008] According to the drying equipment for processing PU synthetic leather, partitions are fixedly engaged on the upper middle parts of both sides of the drying chamber, and a gap is reserved between the partitions and the limiting rollers directly below them. This reduces the gap between the inlet and outlet of the drying chamber, thereby reducing heat loss and external airflow interference.
[0009] According to the aforementioned drying equipment for processing PU synthetic leather, the bottom of each support is fixedly connected with an anti-slip rubber pad to ensure the overall stability and anti-slip properties of the device during installation.
[0010] According to the aforementioned drying equipment for PU synthetic leather processing, a dust filter is fixedly engaged on the inner side of the right end of each exhaust vent. This prevents external dust from entering the drying chamber and causing contamination when the equipment is not in use.
[0011] The above-mentioned solution has the following beneficial effects:
[0012] In this invention, an air exchange chamber is connected to the top of the drying chamber. An air pump is used in conjunction with the drying cylinder to preliminarily dry and filter the external air before introducing it into the air exchange chamber. Correspondingly, the steam that evaporates and rises inside the drying chamber is continuously pushed out from the exhaust port. Since the gas exchange operation is carried out between the external air and the rising steam in the air exchange chamber, the airflow variation inside the drying chamber is small during the air exchange process. Most of the rising steam with high water content is carried away, so the internal temperature variation is also small and the temperature is relatively stable. The uniform distribution of the coating after scraping can be maintained until it is completely dried, and no wavy lines will appear, ensuring the uniformity and smoothness of the coating.
[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0015] Figure 1 This is an overall schematic diagram of a drying device for processing PU synthetic leather according to this utility model;
[0016] Figure 2 This is a schematic diagram of the connection structure between the limiting roller shaft and the supporting roller shaft in a drying equipment for processing PU synthetic leather according to this utility model;
[0017] Figure 3 This is an exploded view of the upper structure of the drying chamber in a drying device for processing PU synthetic leather according to this utility model;
[0018] Figure 4 This is a schematic diagram of the connection structure of the ventilation silo in a drying equipment for processing PU synthetic leather according to this utility model.
[0019] Legend:
[0020] 1. Drying chamber; 2. Electric heating seat; 3. Support; 4. Limiting roller shaft; 5. Supporting roller shaft; 6. Bushing; 7. Base fabric; 8. Frame; 9. Baffle rod; 10. Air exchange chamber; 11. Exhaust trough; 12. Air pump; 13. Air guide pipe; 14. Drying cylinder; 15. Partition plate. Detailed Implementation
[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0022] Reference Figure 1-4 This utility model provides a drying device for processing PU synthetic leather, including: a drying chamber 1, an electric heating seat 2 fitted into the bottom inner side of the drying chamber 1, and supports 3 fixedly connected symmetrically to the bottom of the drying chamber 1. Each support 3 is fixedly connected to the bottom of the support 3. The bottom of the support 3 is fixedly connected to an anti-slip rubber pad. The bottom heating and evaporation drying method is adopted to avoid the interference of hot air drying on the coating.
[0023] On the opposite side of the support 3, the top of the support is fitted with a limiting roller shaft 4. The center of the inner side of the drying chamber 1 is slidably connected to a support roller shaft 5 in the front-to-back direction. The outer sides of the front and rear ends of the support roller shaft 5 and the limiting roller shaft 4 are fitted with bushings 6. The bushings 6 are fitted and fixed to the drying chamber 1 and the support 3 respectively. The upper side of the limiting roller shaft 4 and the supporting roller shaft 5 is fitted with a base cloth 7. The base cloth 7 is coated with slurry. The upper middle part of the left and right sides of the drying chamber 1 is fitted with partitions 15. There is a gap between the partitions 15 and the limiting roller shaft 4 directly below them to provide rolling support for the bottom surface of the base cloth 7, so as to avoid it from contacting the inner wall of the drying chamber 1 and extend the drying path.
[0024] A rectangular channel is provided at the top center of the drying chamber 1. A frame 8 is installed on the bottom outer side of the rectangular channel. The top of the frame 8 is engaged and fixed to the drying chamber 1. Several baffle rods 9 are equidistantly fitted and fixed on the inner side of the frame 8 to block and interfere with the rising airflow and reduce its overall flow velocity.
[0025] A ventilation chamber 10 is mounted directly above the rectangular channel. The bottom of the ventilation chamber 10 is connected and fixed to the drying chamber 1. An exhaust port 11 is connected and fixed at the center of the right side of the ventilation chamber 10. A dust filter is fixedly engaged on the inner side of the right end of the exhaust port 11. An air pump 12 is mounted on the left side of the ventilation chamber 10. The bottom of the air pump 12 is fixedly connected to the drying chamber 1. An air guide pipe 13 is connected and fixedly engaged at the right output end of the air pump 12. The right end of the air guide pipe 13 is connected and fixedly engaged to the ventilation chamber 10. A drying cylinder 14 is fixedly engaged on the outer side of the rear input end of the air pump 12. Several porous drying plates are equidistantly filled on the inner side of the drying cylinder 14 in the front and back directions. After the external air is preliminarily dried and filtered, it is introduced into the ventilation chamber 10 and the steam that evaporates and rises inside the drying chamber 1 is continuously discharged from the exhaust port 11. This ensures that the uniform distribution of the coating after scraping can be maintained until it is completely dried, and no wavy lines will appear, thus ensuring the uniformity and smoothness of the coating.
[0026] Working principle: In this utility model, an air exchange chamber 10 is opened at the top of the drying chamber 1, and an air pump 12 is used in conjunction with the drying cylinder 14 to preliminarily dry and filter the external air before introducing it into the air exchange chamber 10. Correspondingly, the steam that evaporates and rises inside the drying chamber 1 is continuously discharged from the exhaust port 11. Since the gas exchange operation is carried out between the external air and the rising steam inside the air exchange chamber 10, the airflow change amplitude inside the drying chamber 1 is small during the air exchange process. Most of the rising steam with high water content is carried away, so the temperature change amplitude inside is also small, and the temperature is maintained relatively stable. The uniform distribution of the coating after scraping can be maintained until it is completely dried, and no wavy lines will appear, ensuring the uniformity and smoothness of the coating.
[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A drying apparatus for PU synthetic leather processing, comprising: A drying chamber (1) is provided, wherein an electric heating seat (2) is fitted into the bottom of the inner side of the drying chamber (1). The bottom of the drying chamber (1) is symmetrically and fixedly connected to supports (3). On the opposite side of each support (3), a limiting roller shaft (4) is rotatably connected to the top. A pressure roller shaft (5) is slidably connected through the center of the inner side of the drying chamber (1) in a front-to-back direction. Bushings (6) are rotatably fitted to the outer sides of both ends of the pressure roller shaft (5) and the limiting roller shaft (4). The bushings (6) are fitted and fixed to the drying chamber (1) and the supports (3). A base fabric (7) is rolled onto the upper side of the limiting roller shaft (4) and the pressure roller shaft (5). The base fabric (7) is coated with... The slurry has a rectangular through slot at the top center of the drying chamber (1). A ventilation chamber (10) is mounted directly above the rectangular through slot. The bottom of the ventilation chamber (10) is connected and fixed to the drying chamber (1). An exhaust port (11) is connected and fixed at the center of the right side of the ventilation chamber (10). An air pump (12) is mounted on the left side of the ventilation chamber (10). The bottom of the air pump (12) is fixedly connected to the drying chamber (1). An air guide pipe (13) is connected and fixed at the right output end of the air pump (12). The right end of the air guide pipe (13) is connected and fixed to the ventilation chamber (10). A drying cylinder (14) is engaged and fixed on the outside of the rear input end of the air pump (12).
2. The drying apparatus for PU synthetic leather processing according to claim 1, characterized in that, The inner side of the drying cylinder (14) is filled with several porous drying plates at equal intervals in the front and back directions.
3. The drying apparatus for PU synthetic leather processing according to claim 1, characterized in that, A frame (8) is mounted on the outer side of the bottom of the rectangular through slot. The top of the frame (8) is engaged and fixed with the drying chamber (1). Several baffle rods (9) are equidistantly fitted and fixed on the inner side of the frame (8).
4. The drying apparatus for PU synthetic leather processing according to claim 1, characterized in that, The upper middle part of both sides of the drying chamber (1) is fitted with partitions (15), and a gap is reserved between the partitions (15) and the limiting rollers (4) directly below them.
5. The drying equipment for processing PU synthetic leather according to claim 1, characterized in that, The bottom of each support (3) is fixedly connected with an anti-slip rubber pad.
6. The drying apparatus for PU synthetic leather processing according to claim 1, characterized in that, A layer of dust filter is fixedly engaged on the inner side of the right end of each exhaust port (11).