Microcapsule coated flame retardant adding device for rubber

Abstract

The utility model provides a microcapsule coating flame retardant adding device for rubber, and relates to the technical field of mechanical equipment, the device comprises a stockpiling bin, a channel provided with a material distributing mechanism, a material distributing bin, a channel provided with a material waiting mechanism and a blanking bin which are sequentially arranged and communicated from top to bottom, the material distributing mechanism is used for controlling the flow of flame retardant entering the material distributing bin, and the material distributing bin is used for controlling the flow of the flame retardant entering the material distributing bin. According to the flame retardant adding device, through the synergistic effect of the material distributing mechanism and the material waiting mechanism, the problem that discharging is not uniform in the flame retardant adding process is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a device for adding microcapsule-encapsulated flame retardants for rubber. Background Technology

[0002] Microencapsulation of halogen-free environmentally friendly flame retardants for rubber utilizes microencapsulation technology to encapsulate the halogen-free flame retardant components. This not only reduces adverse interactions between the flame retardant and the rubber matrix but also enables the slow release of the flame retardant, significantly improving the flame retardant effect. However, existing flame retardant addition devices face several problems when processing microencapsulated halogen-free environmentally friendly flame retardants for rubber. The main issues are: traditional flame retardant addition devices often employ simple gravity feeding or a single screw conveyor structure, leading to flame retardant accumulation and bridging within the hopper, resulting in significant fluctuations in the feeding rate. When the production process has strict requirements on the flame retardant addition ratio, this unevenness can cause unstable flame retardant performance of the material and even trigger batch quality problems. Utility Model Content

[0003] The purpose of this invention is to provide a device for adding microcapsule-encapsulated flame retardants for rubber, so as to solve the technical problem of uneven feeding in the prior art.

[0004] To solve the above problems, the present invention relates to a microcapsule-encapsulated flame retardant addition device for rubber, which adopts the following technical solution:

[0005] This utility model provides a device for adding microcapsule-encapsulated flame retardant for rubber, including a feeding box. The feeding box has a stacking bin, a distribution bin, and a discharge bin arranged and connected from top to bottom. The stacking bin and the distribution bin are connected by a first vertical channel with a distribution mechanism. The distribution bin and the discharge bin are connected by a second vertical channel with a waiting mechanism. The discharge port of the discharge bin is connected to a third vertical channel. The distribution mechanism includes a cone plug that is matched and slidably installed in the first vertical channel and a telescopic cylinder fixed in the distribution bin by a bracket. The telescopic end of the telescopic cylinder is connected to the cone plug. The telescopic rod works to drive the cone plug to block or open the first vertical channel. The waiting mechanism includes a fixed seat installed in the second vertical channel and blocking it, and a rotating platform rotatably installed on the fixed seat. The fixed seat has a first inlet that vertically penetrates its upper and lower ends. The rotating platform has a second inlet that vertically penetrates its upper and lower ends. During the rotation of the rotating platform, the second inlet can be connected to or closed with the first inlet.

[0006] Preferably, the material receiving mechanism further includes a pushing slope fixed on the rotating table and disposed on one side of the second feed inlet, the slope of the pushing slope extending upward in the radial direction away from the second feed inlet of the rotating table into the material distribution bin.

[0007] Preferably, the cone plug includes a base plate that matches the cross-sectional shape of the first vertical channel and a cone-shaped top block disposed on the base plate.

[0008] Preferably, a scraper mechanism is provided in the third vertical channel. The scraper mechanism includes a rotating shaft rotatably installed in the third vertical channel and scrapers spaced circumferentially along the rotating shaft. One end of the rotating shaft passes through the side wall of the third vertical channel and is connected to a motor located outside the third vertical channel. The motor works to drive the scraper mechanism to rotate in the third vertical channel.

[0009] The beneficial effects of this utility model are as follows:

[0010] This invention provides a device for adding microcapsule-encapsulated flame retardants to rubber. Unlike existing technologies, it features a three-stage compartmentalization system with a dispensing mechanism, a waiting mechanism, and a scraper mechanism between the two compartments. The dispensing mechanism dynamically controls the opening and closing of the first vertical channel via a cone plug, while the waiting mechanism's rotating table precisely opens and closes the second inlet. This addresses the issue of concentrated material pressure caused by single-channel dispensing, enabling stable batch dispensing across multiple compartments. Simultaneously, the scraper mechanism effectively prevents the flame retardant from clumping within the channels, improving dispensing uniformity and reducing bridging and blockage. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below:

[0012] Figure 1 This is a schematic diagram of a device for adding microcapsules-encapsulated flame retardants to rubber.

[0013] In the diagram: 1. Stacking bin; 2. Distribution bin; 3. Discharge bin; 4. Conical plug; 5. Telescopic cylinder; 6. Fixed base; 7. Rotary table; 8. Pushing slope; 9. Servo motor; 10. Scraper; 11. Rotating shaft. Detailed Implementation

[0014] To make the technical objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] This utility model provides a device for adding microcapsules-encapsulated flame retardants for rubber, which solves the problem of material pressure concentration easily caused by single-channel material feeding. It includes a feeding box, within which are arranged and connected from top to bottom: a stockpiling bin 1, a distribution bin 2, and a feeding bin 3. The stockpiling bin 1 and the distribution bin 2 are connected by a first vertical channel equipped with a distribution mechanism. The distribution bin 2 and the feeding bin 3 are connected by a second vertical channel equipped with a waiting mechanism. The feeding bin 3 and the discharge port are connected by a third vertical channel equipped with a scraper mechanism. By constructing a multi-layered, layered bin structure, the feeding process is decomposed into three stages: stockpiling, distribution, and buffering. The distribution mechanism enables intermittent material discharge from the stockpiling bin 1, and the waiting mechanism completes the quantitative material discharge from the distribution bin 2, ultimately forming a stable material conveying system. Specifically:

[0016] The material distribution mechanism includes a cone plug 4 that is slidably installed in the first vertical channel and a telescopic cylinder 5 that is fixed in the material distribution bin 2 by a bracket. The telescopic end of the telescopic cylinder 5 is connected to the cone plug 4. The telescopic cylinder 5 drives the cone plug 4 to move along the length of the first vertical channel. The telescopic rod can move the cone plug 4 out of the first vertical channel to open the first vertical channel or into the first vertical channel to block the first vertical channel. This structure adjusts the material discharge of the material bin 1 by the up and down movement of the cone plug 4 to avoid continuous accumulation of materials.

[0017] The material receiving mechanism includes a fixed base 6 installed and sealed within the second vertical channel, and a rotary table 7 rotatably mounted on the fixed base 6. The fixed base 6 has a first feed port vertically penetrating its upper and lower ends, and the rotary table 7 has a second feed port vertically penetrating its upper and lower ends. During rotation, the rotary table 7 changes the relative position of the second feed port and the first feed port, causing them to periodically connect or close, forming an intermittent feeding mechanism. The cooperation structure between the fixed base 6 and the rotary table 7 enables secondary distribution of materials in the distribution bin 2, ensuring the stability of material supply to the discharging bin 3. The rotary table 7 is a prior art device, consisting of a rotatable disc mounted on the fixed base 6 via a pin. The pin is coaxial with and fixed to the rotary table 7, and one end of the pin passes through the fixed base 6 and is gear-driven to a servo motor 9 on the fixed base 6.

[0018] The flame retardant stored in the stockpile 1 is controlled to enter the distribution silo 2 by the distribution mechanism. When the telescopic cylinder 5 drives the cone plug 4 to move down and open the first vertical channel, the material enters the distribution silo 2 for temporary storage. After the material in the distribution silo 2 reaches the set amount, the cone plug 4 resets and closes the channel. The material in the distribution silo 2 is periodically rotated by the rotary table 7 to align the second feed port with the first feed port of the fixed seat 6. The material falls into the discharge silo 3 through the second vertical channel, and the third vertical channel outputs the material from the discharge silo 3, completing the quantitative addition. In this process, the coordinated action of the distribution mechanism and the waiting mechanism forms a staged material control, eliminating the continuous feeding pressure of a single channel. The staged control of the feeding amount can ensure the stability of the material flow into the screw conveyor and improve the accuracy of the flame retardant addition ratio.

[0019] Furthermore, the material receiving mechanism also includes a pushing slope 8 fixed on the rotary table 7 and located on one side of the second feed inlet. The slope surface of the pushing slope 8 forms an angle with the radial direction of the rotary table 7. The slope surface of the pushing slope 8 extends upward in the radial direction away from the second feed inlet into the distribution bin 2. This structure applies a lateral thrust to the flame retardant in the distribution bin 2 during rotation through the inclined surface. Specifically, when the rotary table 7 drives the pushing slope 8 to rotate around the axis, the inclined extension direction of the slope surface ensures that it continuously contacts the flame retardant accumulated in the distribution bin 2 during radial movement. As the slope surface gradually rises outward from the edge of the second feed inlet, the flame retardant is pushed along the inclined direction under the guidance of the slope surface, thereby destroying the accumulation layer of material formed at the edge of the second feed inlet.

[0020] Furthermore, the cone plug 4 includes a base plate that matches the cross-sectional shape of the first vertical channel, and a cone-shaped top block disposed on the base plate. When the telescopic cylinder 5 moves the cone plug 4 along the first vertical channel, the edge of the base plate comes into close contact with the inner wall of the channel to form a seal, blocking the connection between the stockpiling bin 1 and the distribution bin 2. The cone surface of the top block forces the material remaining on the base plate to slide to the surrounding area, avoiding local accumulation. When the cone plug 4 moves upward to open the channel, the cone-shaped structure of the top block can guide the material to fall evenly along the cone surface to the distribution bin 2.

[0021] Furthermore, a scraper mechanism is installed within the third vertical channel. This scraper mechanism includes a rotating shaft 11 rotatably mounted within the third vertical channel and scrapers 10 spaced circumferentially along the shaft 11. One end of the rotating shaft 11 extends through the side wall of the third vertical channel and is connected to a motor located outside the channel. The motor drives the scraper mechanism to rotate within the third vertical channel. The rotating shaft 11 is supported by bearings to rotate around its own axis. The edge of the scrapers 10 is clearance-fitted with the inner wall of the third vertical channel, and the material is stripped away by rotating and scraping the inner wall. Compared to existing technologies, traditional devices only have fixed guide plates at the bottom of the silo, which cannot actively intervene in the material accumulation pattern. This mechanism, however, dynamically adjusts the material distribution during rotation, continuously eliminating the risk of material bridging and maintaining the continuous unobstructed flow of the material discharge channel.

[0022] Among them, the motor refers to the power device that drives the rotating shaft 11 to rotate. Specifically, a geared motor can be used and connected to the rotating shaft 11 through a coupling. The motor speed can be adjusted to match the material cleaning requirements under different working conditions.

[0023] Finally, it should be noted that the above embodiments are only for illustration and not for limiting the technical solutions of this utility model. Any equivalent substitutions and modifications or partial substitutions that do not depart from the spirit and scope of this utility model should be covered within the scope of protection of the claims of this utility model.

Claims

1. A device for adding microcapsule-encapsulated flame retardants to rubber, characterized in that, The device includes a feeding box, which contains a stacking bin, a distribution bin, and a discharge bin arranged and connected from top to bottom. The stacking bin and the distribution bin are connected by a first vertical channel equipped with a distribution mechanism. The distribution bin and the discharge bin are connected by a second vertical channel equipped with a waiting mechanism. The discharge port of the discharge bin is connected to a third vertical channel. The distribution mechanism includes a cone plug that is slidably installed in the first vertical channel and a telescopic cylinder that is fixed in the distribution bin by a bracket. The telescopic end of the telescopic cylinder is connected to the cone plug. The telescopic rod works to drive the cone plug to block or open the first vertical channel. The waiting mechanism includes a fixed seat installed in the second vertical channel and blocking it, and a rotating platform rotatably installed on the fixed seat. The fixed seat has a first feed port that vertically penetrates its upper and lower ends, and the rotating platform has a second feed port that vertically penetrates its upper and lower ends. During the rotation of the rotating platform, the second feed port can be connected to or closed with the first feed port.

2. The device for adding microcapsule-encapsulated flame retardant for rubber according to claim 1, characterized in that, The material receiving mechanism also includes a pusher slope fixed on the rotating table and located on one side of the second feed inlet. The slope of the pusher slope extends upward in the radial direction away from the second feed inlet of the rotating table into the material distribution bin.

3. The device for adding microcapsule-encapsulated flame retardant for rubber according to claim 2, characterized in that, The cone plug includes a base plate that matches the cross-sectional shape of the first vertical channel and a cone-shaped top block disposed on the base plate.

4. The device for adding microcapsule-encapsulated flame retardant for rubber according to claim 1, characterized in that, A scraper mechanism is installed in the third vertical channel. The scraper mechanism includes a rotating shaft rotatably installed in the third vertical channel and scrapers spaced circumferentially along the rotating shaft. One end of the rotating shaft passes through the side wall of the third vertical channel and is connected to a motor located outside the third vertical channel. The motor works to drive the scraper mechanism to rotate in the third vertical channel.

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