A tunnel furnace for controlling the sedimentation degree of particles in a film in a segmented manner

Abstract

The present invention discloses a tunnel furnace for controlling the degree of particle sedimentation in a film by segmentation and partition, comprising a support, a conveyor belt, a tunnel furnace cover, a multi-zone temperature control and heating device, a particle sedimentation monitoring device, an inter-segment isolation device, a temperature control and heating device, an isolation box and a cooling box; the inter-segment isolation device divides the area in the tunnel furnace cover into two sections, the front section is a partitioned real-time temperature control section for controlling the particle sedimentation speed, and the rear section is a rapid solidification section for maintaining the sedimentation degree and rapidly solidifying, thereby achieving effective control of particle sedimentation. Due to the particle sedimentation monitoring device provided in the present invention, it is possible to enable the multi-zone temperature control and heating device to adjust the heating temperature of each area in real time according to the monitored particle sedimentation degree information of each area, so as to control the particle sedimentation degree of each area on the entire film plane at a uniform level. The present invention controls the particle sedimentation by controlling the solidification temperature, thereby improving the performance of the particle film and the matching of the subsequent process.

Description

Technical Field

[0001] The invention relates to the technical field of film drying, in particular to a tunnel furnace for controlling the sedimentation degree of particles in a film in a segmented manner. Background Art

[0002] The process of preparing thin films by mixing high-viscosity fluids such as organic silicone and epoxy resin with particles has been widely used in the fields of chemical industry, optics and electronic technology. In the preparation of thin films, the curing process is one of the important processes, which affects the quality and performance of the film, and the tunnel furnace is a common drying equipment in the film production process. The tunnel furnace is a kind of assembly line device. The working principle is to heat and dry the continuously running conveying system inside it through heat conduction, convection and radiation. During drying and curing, the film generates relative movement between the conveying chain plate, steel belt or mesh belt and the electric heating element, thereby completing the work of uniform drying and conveying.

[0003] However, in the process of preparing and curing the particle-containing film, since the density of the particles is often much greater than the density of the liquid, they are prone to sedimentation under the action of gravity, and the degree of sedimentation of such particles is highly correlated with the degree of curing of the film. Therefore, when the degree of curing of the film is uncontrollable, the degree of sedimentation of the particles is also random, which seriously affects the uniformity and reliability of the quality of the particle-containing film. Most of the existing tunnel furnace devices only set a fixed temperature and curing time, but do not consider the sedimentation problem of the particles during the curing process, resulting in the accumulation of particles in the liquid at the bottom of the film, and the final film performance does not meet the predetermined value. Moreover, due to the uneven heating of the tunnel furnace on the entire film plane, the degree of particle sedimentation in each area is different, and the final cured particle-containing film has poor uniformity, and the quality and performance do not meet the use requirements. Therefore, there is an urgent need for a drying device that can control the degree of particle sedimentation in different regions during the film curing stage according to the control target of particle sedimentation. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention designs a tunnel furnace which can control the sedimentation degree of particles in the film in a segmented manner and at a given target on the entire plane.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a tunnel furnace for controlling the degree of particle settling in a film in a segmented and partitioned manner, comprising a support, a conveyor belt, a tunnel furnace cover, a multi-zone temperature control and heating device, a particle settling monitoring device, an inter-segment isolation device, a temperature control and heating device, an isolation box and a cooling box;

[0006] The tunnel furnace cover is fixed to the front section above the bracket, the cooling box is fixed to the rear section above the bracket, and the isolation box is installed between the tunnel furnace cover and the cooling box;

[0007] The conveyor belt is fixed above the bracket and passes through the tunnel furnace cover, the isolation box and the cooling box;

[0008] The inter-section isolation device divides the area in the tunnel furnace cover into two sections, the front section is a zoned real-time temperature control section for controlling the particle settling speed, and the rear section is a rapid solidification section for maintaining the degree of settling and rapid solidification;

[0009] The partitioned real-time temperature control section is provided with a regional temperature control and heating device and a particle sedimentation monitoring device, and the rapid solidification section is provided with a temperature control and heating device;

[0010] The particle settling monitoring device is used to monitor the degree of particle settling in each area of ​​the entire film plane;

[0011] The motor is fixedly mounted on the tunnel furnace cover or the bracket and is used to drive the conveyor belt;

[0012] The isolation box is located at the exit of the rapid solidification section to isolate the heat transfer between the rapid solidification section and the cooling box;

[0013] The cooling box realizes cooling and dust removal of the cured film.

[0014] Furthermore, the multi-zone temperature control and heating device and the temperature control and heating device are fixed above the bracket or on the inner wall of the tunnel furnace cover.

[0015] Furthermore, the particle sedimentation monitoring device and the inter-segment isolation device are both fixed on the inner wall of the tunnel furnace hood.

[0016] Furthermore, the multi-zone temperature control and heating device divides the zoned real-time temperature control section into N heating zones, wherein the value of N is set according to the process requirements, each heating zone independently controls the heating temperature, and adjusts the temperature of each heating zone on the conveyor belt.

[0017] Furthermore, the multi-zone temperature control and heating device and the particle sedimentation monitoring device are a negative feedback closed-loop control system, that is, the multi-zone temperature control and heating device adjusts the temperature in real time according to the particle sedimentation conditions detected by the particle sedimentation monitoring device.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention divides the curing process of the tunnel furnace into different stages, namely, the partitioned real-time temperature control section and the rapid curing section. The inter-segment isolation device is located at the exit of the partitioned real-time temperature control section to isolate the heat transfer between the partitioned real-time temperature control section and the rapid curing section; the partitioned real-time temperature control section is used to control the particle settling speed, and the rapid curing section is used to maintain the settling degree and rapidly cure, thereby achieving effective control of particle settling.

[0020] 2. Due to the particle sedimentation monitoring device provided in the present invention, it is possible to realize that according to the particle sedimentation degree information of each area monitored, the multi-area temperature control heating device can adjust the heating temperature of each area in real time, so as to control the particle sedimentation degree of each area on the entire film plane at a uniform level.

[0021] 3. Since the present invention is provided with a multi-stage heating furnace, the sedimentation curve of the particles in the liquid at various temperatures is clarified and the degree of sedimentation of the particles in the liquid is monitored by the sensor, and the particle sedimentation is controlled by controlling the curing temperature, thereby improving the performance of the particle film and the matching of the subsequent processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention, which mainly comprises a zoned real-time temperature control section and a rapid curing section;

[0023] Figure 2 for Figure 1 Schematic diagram of the multi-zone temperature control and heating device.

[0024] In the figure: 1. bracket; 2. conveyor belt; 3. multi-zone temperature control and heating device; 4. particle sedimentation monitoring device; 5. tunnel furnace cover; 6. inter-section isolation device; 7. motor; 8. temperature control and heating device; 9. isolation box; 10. cooling box. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0026] like Figure 1-2 As shown, a tunnel furnace for controlling the degree of particle settling in a film in a segmented manner comprises a support 1, a conveyor belt 2, a tunnel furnace cover 5, a multi-zone temperature control and heating device 3, a particle settling monitoring device 4, an inter-segment isolation device 6, a temperature control and heating device 8, an isolation box 9 and a cooling box 10;

[0027] The tunnel furnace cover 5 is fixed to the front section above the bracket 1, the cooling box 10 is fixed to the rear section above the bracket 1, and the isolation box 9 is installed between the tunnel furnace cover 5 and the cooling box 10;

[0028] The conveyor belt 2 is fixed above the support 1 and passes through the tunnel furnace cover 5, the isolation box 9 and the cooling box 10;

[0029] The inter-section isolation device 6 divides the area inside the tunnel furnace cover 5 into two sections, the front section is a zoned real-time temperature control section for controlling the particle settling speed, and the rear section is a rapid solidification section for maintaining the sedimentation degree and rapid solidification;

[0030] The partitioned real-time temperature control section is provided with a regional temperature control and heating device 8 and a particle sedimentation monitoring device 4, and the rapid solidification section is provided with a temperature control and heating device 8;

[0031] The particle settling monitoring device 4 is used to monitor the degree of particle settling in each area of ​​the entire film plane;

[0032] The motor 7 is fixedly mounted on the tunnel furnace cover 5 or the bracket 1 and is used to drive the conveyor belt 2;

[0033] The isolation box 9 is located at the exit of the rapid solidification section to isolate the heat transfer between the rapid solidification section and the cooling box 10;

[0034] The cooling box 10 is used to cool and remove dust from the cured film.

[0035] Furthermore, the multi-zone temperature control and heating device 3 and the temperature control and heating device 8 are fixed above the bracket 1 or on the inner wall of the tunnel furnace cover 5 .

[0036] Furthermore, the particle settling monitoring device 4 and the inter-stage isolation device 6 are both fixed on the inner wall of the tunnel furnace hood 5 .

[0037] Furthermore, the multi-zone temperature control and heating device 3 divides the zoned real-time temperature control section into N heating zones, wherein the value of N is set according to the process requirements, each heating zone independently controls the heating temperature, and adjusts the temperature of each heating zone on the conveyor belt 2.

[0038] Furthermore, the multi-zone temperature control and heating device 3 and the particle sedimentation monitoring device 4 form a negative feedback closed-loop control system, that is, the multi-zone temperature control and heating device 3 adjusts the temperature in real time according to the particle sedimentation conditions detected by the particle sedimentation monitoring device 4.

[0039] The working principle of the present invention is as follows:

[0040] After the particle film is prepared, it is transported to the tunnel furnace through the conveyor belt 2. During this process, the particles in the film settle due to gravity. First, the film enters the partitioned real-time temperature control section from the conveyor belt 2, and the particle sedimentation monitoring device 4 detects the particle sedimentation in each area. In the case of clarifying the sedimentation curves of given particles and solutions at various temperatures, the monitored particle sedimentation is compared, and the temperature of the heating device in each area is controlled through a negative feedback closed-loop control system to achieve controllable sedimentation of particles in each area; then, by controlling the heating temperature in the rapid curing section, the temperature is set to above the critical value of the film's rapid curing temperature. At this time, the film is rapidly cured in the rapid curing section, and then the sedimentation degree controlled in the partitioned real-time temperature control section is maintained, and finally a film with an ideal particle sedimentation degree is obtained.

Claims

1. A tunnel furnace for controlling the degree of particle settling in a film in a segmented manner, characterized in that: It comprises a support (1), a conveyor belt (2), a tunnel furnace cover (5), a multi-zone temperature control and heating device (3), a particle sedimentation monitoring device (4), an inter-segment isolation device (6), a temperature control and heating device (8), an isolation box (9) and a cooling box (10); The tunnel furnace cover (5) is fixed to the front section above the support (1), the cooling box (10) is fixed to the rear section above the support (1), and the isolation box (9) is installed between the tunnel furnace cover (5) and the cooling box (10); The conveyor belt (2) is fixed above the support (1) and passes through the tunnel furnace cover (5), the isolation box (9) and the cooling box (10); The inter-section isolation device (6) divides the area inside the tunnel furnace cover (5) into two sections, the front section is a zoned real-time temperature control section for controlling the particle settling speed, and the rear section is a rapid solidification section for maintaining the degree of settling and rapid solidification; The zoned real-time temperature control section is provided with a zone temperature control and heating device (8) and a particle sedimentation monitoring device (4), and the rapid solidification section is provided with a temperature control and heating device (8); The particle settling monitoring device (4) is used to monitor the degree of particle settling in each area of ​​the entire film plane; The motor (7) is fixedly mounted on the tunnel furnace cover (5) or the bracket (1) and is used to drive the conveyor belt (2); The isolation box (9) is located at the outlet of the rapid solidification section to isolate the heat transfer between the rapid solidification section and the cooling box (10); The cooling box (10) is used to cool and remove dust from the film that has been cured.

2. According to claim 1, a tunnel furnace for controlling the degree of particle settling in a film by segmented partitions, characterized in that: The multi-zone temperature control and heating device (3) and the temperature control and heating device (8) are fixed above the bracket (1) or on the inner wall of the tunnel furnace cover (5).

3. According to claim 1, a tunnel furnace for controlling the degree of particle settling in a film by segmented partitions, characterized in that: The particle settling monitoring device (4) and the inter-stage isolation device (6) are both fixed on the inner wall of the tunnel furnace cover (5).

4. According to claim 1, a tunnel furnace for controlling the degree of particle settling in a film by segmented partitions, characterized in that: The multi-zone temperature control and heating device (3) divides the zoned real-time temperature control section into N heating zones, wherein the value of N is set according to the process requirements, and each heating zone independently controls the heating temperature, thereby adjusting the temperature of each heating zone on the conveyor belt (2).

5. According to claim 1, a tunnel furnace for controlling the degree of particle settling in a film by segmented partitions, characterized in that: The multi-zone temperature control and heating device (3) and the particle sedimentation monitoring device (4) form a negative feedback closed-loop control system, that is, the multi-zone temperature control and heating device (3) adjusts the temperature in real time according to the particle sedimentation conditions detected by the particle sedimentation monitoring device (4).

Images