Color master batch cutting and belt conveying pre-drying device for producing hair fibers

Abstract

This utility model discloses a belt conveyor pre-drying device for masterbatch pelleting in fiber production, comprising a drying chamber, a feeding hopper on the top left side of the drying chamber, a feeding cone on the bottom right side of the drying chamber, and N layers of belt conveyors arranged along the height direction inside the drying chamber, where N is an odd number greater than or equal to 3. The conveying direction of the N layers of belt conveyors forms a left-right reciprocating baffled conveying structure. A hot air inlet pipe is located on the right side of the bottommost belt conveyor at the lower right side of the drying chamber, and a dehumidification outlet pipe is located on the left side of the topmost belt conveyor at the upper left side of the drying chamber. This utility model heats and dehumidifies (pre-dries) the masterbatch during the conveying process, which reduces the drying time in the drying equipment. Furthermore, the two drying devices operate intermittently (one receiving material while the other is drying), thus greatly improving drying efficiency and effect. It also eliminates the need for manual handling of the masterbatch, reducing labor intensity and preventing spillage and loss.

Description

Technical Field

[0001] This utility model belongs to the field of wig production technology, specifically relating to a belt conveyor pre-drying device for masterbatch pelleting and conveying after hair fiber production. Background Technology

[0002] Color masterbatch is a special material designed specifically for coloring wig fibers. By adding color masterbatch, wigs can be produced in different colors that do not fade over time, catering to the needs of different customer groups. The production process of color masterbatch typically involves plasticizing molten material using an extruder, forming it into continuous filaments through a die, and then rapidly cooling it in a cooling water tank before cutting it into granules using a pelletizer. Color masterbatch is highly hygroscopic and will absorb moisture after being exposed to air for a period of time, especially materials such as PET, ABS, PA, and PC. Furthermore, the rapid cooling in the cooling water tank before pelletizing results in a significant amount of internal moisture. Therefore, color masterbatch needs to be dried using drying equipment (cyclone centrifugal dryer) before storage. In the fiber production workshop, the pelletizer and drying equipment are several meters apart. After pelletizing, the color masterbatch is stored in transfer bins. Multiple transfer bins are used; when one is full, an empty transfer bin is used to continue receiving color masterbatch. The color masterbatch from the full transfer bins is manually transferred and poured into the drying equipment, which then begins operation. During the drying process, if a transfer bin becomes full, it is replaced with an empty one. After one cycle of drying is completed, the color masterbatch from the full transfer bins is transferred and poured into the drying equipment again, and this cycle repeats. This drying method has the following problems: 1) One drying equipment corresponds to one pelletizer. Since the water-cooled masterbatch contains a lot of moisture, it takes a long time to dry it to the specified moisture content. The capacity of the drying equipment and the pelletizing amount need to be matched during one drying period. Therefore, the operating efficiency of the pelletizer is difficult to achieve, which naturally affects the production efficiency of the masterbatch.

[0003] 2) The transfer of the masterbatch-filled transfer drums to the drying equipment is done manually, which is labor-intensive.

[0004] 3) When changing the transfer container or when pouring masterbatch into the drying equipment, the masterbatch is easy to spill onto the ground. Once spilled, it gets covered in dust and cannot be used directly, resulting in some loss. Utility Model Content

[0005] In order to solve the above-mentioned technical problems in the prior art, this utility model provides a pre-drying device for color masterbatch production after pelleting by belt conveyor, which adopts closed conveying, can improve the working efficiency of drying equipment, increase the production of color masterbatch, and reduce labor intensity.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: a belt conveyor pre-drying device for color masterbatch pelleting in fiber production, comprising a drying box, a support column at the bottom of the drying box, a feed hopper on the left side of the top of the drying box, a discharge cone on the right side of the bottom of the drying box, the lower end of the discharge cone connected to the main discharge pipe, the front and rear sides of the main discharge pipe respectively connected to an inclined first discharge branch pipe and a second discharge branch pipe, the lower ends of the first discharge branch pipe and the second discharge branch pipe respectively connected to the feed inlets at the top of the first drying equipment and the second drying equipment, a first valve on the first discharge branch pipe, a second valve on the second discharge branch pipe, and N layers of belt conveyors arranged along the height direction inside the drying box, where N is an odd number greater than or equal to 3, the conveying direction of the N layers of belt conveyors forms a left-right reciprocating deflection conveying structure, wherein the uppermost and lowermost belt conveyors both convey from left to right, a hot air inlet pipe is provided on the right side of the lower right side of the drying box and on the right side of the uppermost belt conveyor, and a moisture exhaust pipe is provided on the left side of the upper left side of the drying box and on the left side of the uppermost belt conveyor.

[0007] The distance between the right end of the belt conveyor of the odd-numbered layers and the right side wall of the drying chamber is greater than that between the right end of the belt conveyor of the even-numbered layers and the right side wall of the drying chamber; the distance between the left end of the belt conveyor of the even-numbered layers and the left side wall of the drying chamber is greater than that between the left end of the belt conveyor of the odd-numbered layers and the left side wall of the drying chamber; the front and rear side walls of the drying chamber are equipped with windproof and particle-preventing soft brushes that slide in contact with the upper half of the belt of each belt conveyor. A left guide plate is fixed on the left side wall of the drying chamber, located at the top left side of the belt conveyor except for the top odd-numbered layers. The left guide plate is inclined with the left side higher than the right side, and the lower side of the left guide plate is provided with left bristles that slide in contact with the upper surface of the belt of the belt conveyor. The right guide plate of the belt conveyor with an even number of layers is fixed on the right side wall of the drying chamber. The right guide plate is inclined with the left side lower and the right side higher. The lower side of the right guide plate is provided with right bristles that slide in contact with the upper surface of the belt of the belt conveyor.

[0008] An air heater is installed on the hot air inlet pipe. A high-pressure air pump is connected to the inlet of the hot air inlet pipe. A flat dispersion cover that is thinner on the left and thicker on the right, and wider on the left and narrower on the right, is connected to the outlet of the hot air inlet pipe. The flat dispersion cover extends into the drying chamber through the right side wall of the drying chamber. A flat jet nozzle that sprays air to the left is provided at the left end of the flat dispersion cover.

[0009] A right booster fan is fixed on the right side wall of the drying chamber, located above the right side of the belt conveyor except for the bottom odd-numbered layers. The air outlet pipe of the right booster fan is connected to a right flat booster nozzle that sprays air to the left. A left booster fan is fixed on the left side wall of the drying chamber, located above the left side of the belt conveyor on the even-numbered layer. The exhaust pipe of the left booster fan is connected to a left flat booster nozzle that sprays air to the right.

[0010] Using the above technical solution, this utility model is installed between the pelletizer and the drying equipment. The pelletizer's discharge position is located directly above the feed inlet of this utility model, and the drying equipment's feed inlet is located directly below the discharge cone in this utility model. Taking a three-layer belt conveyor as an example, the working process of this utility model is as follows: First, close the second valve on the second discharge branch pipe, open the first valve on the first discharge branch pipe, and start all belt conveyors, high-pressure air pumps, and air heaters. The masterbatch cut by the pelletizer falls directly into the feed hopper, and then onto the belt of the uppermost belt conveyor. The uppermost belt conveyor conveys the masterbatch to the right, and when it reaches the right end, it falls onto the belt of the middle belt conveyor. The middle belt conveyor conveys the masterbatch to the left, and when it reaches the left end, it falls onto the belt of the lower belt conveyor. The lower belt conveyor conveys the masterbatch to the right, and when it reaches the right end... The material falls into the feeding cone, then enters the first drying equipment through the main feeding pipe and the first feeding branch pipe. When the feeding amount in the first drying equipment reaches a suitable level, the first valve is closed and the first drying equipment is started for drying. At the same time, the second valve is opened, and the masterbatch in the main feeding pipe falls into the second drying equipment through the second feeding branch pipe. While feeding the masterbatch into the second drying equipment, the first drying equipment dries the masterbatch. The feeding time can be set to be basically consistent with the drying time of the drying equipment plus the unloading time, so that the intermittent switching between the first and second drying equipment can be achieved, and the pelletizer can operate continuously without stopping.

[0011] During the conveying of masterbatch on the three-layer belt conveyor, a high-pressure air pump sends ambient air into an air heater, which heats the air. The high-pressure hot air is then injected through a flat dispersion cover and a flat nozzle onto the upper right side of the bottom belt conveyor. The high-temperature airflow heats and dries the masterbatch spread on the belt from right to left along the top of the bottom belt conveyor. Then, a left booster fan, through a left flat booster nozzle, heats and dries the masterbatch spread on the belt of the middle belt conveyor from left to right along the top of the middle belt conveyor. Next, a right booster fan, through a right flat booster nozzle, heats and dries the masterbatch spread on the belt of the upper belt conveyor from right to left along the top of the upper belt conveyor. Finally, the airflow carrying more moisture is discharged through the exhaust pipe on the left side of the drying chamber.

[0012] This invention employs a multi-layer belt conveyor with a reciprocating flow conveying structure. This structure is more compact, saving space and increasing the time that the masterbatch is heated by the hot air flow in the drying chamber, thereby improving the pre-drying efficiency.

[0013] The windproof and particle-preventing soft brush, the left guide plate, and the right guide plate not only enclose the surrounding area of ​​the baffle channel inside the drying chamber as much as possible, but also ensure that the airflow direction is opposite to the direction of conveying the masterbatch. This allows for more and more effective heat exchange between the high-temperature airflow and the masterbatch, improving drying efficiency and effect.

[0014] Because the airflow channel inside the drying chamber has a baffle structure, a left booster fan and a right booster fan are respectively installed at the bends on the left and right sides of the drying chamber to increase the running speed of the high-pressure airflow inside the drying chamber. By using a larger airflow, the drying efficiency and effect are improved.

[0015] In summary, this invention heats and dehumidifies (pre-dries) the masterbatch during the conveying process, which reduces the drying time in the drying equipment. Furthermore, the two drying devices operate intermittently (one receives material while the other dries), thereby greatly improving drying efficiency and effectiveness. At the same time, it eliminates the need for manual handling of the masterbatch, reducing labor intensity and preventing the masterbatch from spilling and reducing losses. Attached Figure Description

[0016] Figure 1 This is a top view of the structure of this utility model; Figure 2 for Figure 1 Sectional view of AA; Figure 3 for Figure 1 Side view of the connection between the middle and lower feeding cone, the main feeding pipe, the first feeding branch pipe and the second feeding branch pipe; Figure 4 for Figure 1 Top view of the hot air intake pipe, flat dispersion shroud, and flat jet nozzle. Detailed Implementation

[0017] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] like Figures 1-4As shown, the pre-drying device for masterbatch pelleting in fiber production of this utility model includes a drying chamber 1 (preferably with insulation material on the outside of the drying chamber 1), a support column 2 at the bottom of the drying chamber 1, a feed hopper 3 on the top left side of the drying chamber 1, and a discharge cone 4 on the bottom right side of the drying chamber 1. The lower end of the discharge cone 4 is connected to a main discharge pipe 5. The front and rear sides of the main discharge pipe 5 are respectively connected to an inclined first discharge branch pipe 6 and a second discharge branch pipe 7. The lower ends of the first discharge branch pipe 6 and the second discharge branch pipe 7 are respectively connected to a first drying device and a second drying device. The drying chamber 1 has a top feed inlet, a first valve 8 on the first feed branch pipe 6, and a second valve 9 on the second feed branch pipe 7. Inside the drying chamber 1, there are N layers of belt conveyors 10 along the height direction, where N equals 3. The conveying direction of the N layers of belt conveyors 10 forms a left-right reciprocating flow conveying structure. The uppermost and lowermost belt conveyors 10 both convey from left to right. A hot air inlet pipe 11 is located on the lower right side of the drying chamber 1, to the right of the lowermost belt conveyor 10. A moisture exhaust pipe 12 is located on the upper left side of the drying chamber 1, to the left of the uppermost belt conveyor 10.

[0019] The distance between the right end of the belt conveyor 10 of the odd-numbered layers and the right side wall of the drying chamber 1 is greater than that between the right end of the belt conveyor 10 of the even-numbered layers and the right side wall of the drying chamber 1; the distance between the left end of the belt conveyor 10 of the even-numbered layers and the left side wall of the drying chamber 1 is greater than that between the left end of the belt conveyor 10 of the odd-numbered layers and the left side wall of the drying chamber 1; the front and rear side walls of the drying chamber 1 are equipped with windproof and particle-preventing soft brushes 13 that slide in contact with the upper half of the belt surface of each belt conveyor 10. A left guide plate 14 is fixed on the left side wall of the drying oven 1, located at the top left side of the belt conveyor 10 except for the top odd-numbered layers. The left guide plate 14 is inclined with the left side higher than the right side, and the lower side of the left guide plate 14 is provided with left bristles that slide in contact with the upper surface of the belt of the belt conveyor 10. The right guide plate 15 of the belt conveyor 10 with an even number of layers is fixed on the right side wall of the drying oven 1. The right guide plate 15 is inclined with the left side lower and the right side higher. The lower side of the right guide plate 15 is provided with right brush bristles that slide in contact with the upper surface of the belt of the belt conveyor 10.

[0020] An air heater 16 is provided on the hot air inlet pipe 11. A high-pressure air pump 17 is connected to the air inlet of the hot air inlet pipe 11. A flat dispersion cover 18 with a thin left side and a thick right side, and a wide left side and a narrow right side is connected to the air outlet of the hot air inlet pipe 11. The flat dispersion cover 18 extends into the drying chamber 1 through the right side wall of the drying chamber 1. A flat jet nozzle 19 for jetting air to the left is provided at the left end of the flat dispersion cover 18.

[0021] A right booster fan 20 is fixedly installed on the right side wall of the drying chamber 1, located above the right side of the belt conveyor 10 (excluding the bottom odd-numbered layers). The outlet pipe of the right booster fan 20 is connected to a right flat booster nozzle 21 that sprays air to the left. A left booster fan 22 is fixed on the left side wall of the drying chamber 1, located above the left side of the belt conveyor 10 on the even-numbered layer. The outlet pipe of the left booster fan 22 is connected to a left flat booster nozzle 23 that sprays air to the right.

[0022] This utility model is installed between a pelletizer and a drying device. The pelletizer's discharge position is located directly above the feed inlet of this utility model, and the drying device's feed inlet is located directly below the discharge cone 4 in this utility model. Taking a three-layer belt conveyor 10 as an example, the specific working process of this utility model is as follows: First, close the second valve 9 on the second discharge branch pipe 7, open the first valve 8 on the first discharge branch pipe 6, and start all belt conveyors 10, high-pressure air pump 17, and air heater 16. The masterbatch cut by the pelletizer falls directly into the feed hopper 3, and then onto the belt of the uppermost belt conveyor 10. The uppermost belt conveyor 10 conveys the masterbatch to the right, and when it reaches the right end, it falls onto the belt of the middle belt conveyor 10. The middle belt conveyor 10 conveys the masterbatch to the left, and when it reaches the left end, it falls onto the belt of the lower belt conveyor 10. The lower belt conveyor 10 then conveys the masterbatch to the right... The material is conveyed to the right end and falls into the feeding cone 4. Then, it enters the first drying equipment through the feeding main pipe 5 and the first feeding branch pipe 6. When the feeding amount in the first drying equipment reaches a suitable level, the first valve 8 is closed and the first drying equipment is started for drying. At the same time, the second valve 9 is opened, and the masterbatch in the feeding main pipe 5 falls into the second drying equipment through the second feeding branch pipe 7. While feeding the second drying equipment, the first drying equipment dries the masterbatch. The feeding time can be set to be basically consistent with the drying time of the drying equipment plus the unloading time. In this way, the intermittent switching between the first and second drying equipment can be realized, and the pelletizer can operate continuously without stopping.

[0023] During the process of conveying masterbatch on the three-layer belt conveyor 10, the high-pressure air pump 17 sends room temperature air into the air heater 16, which heats the air. The high-pressure hot air is sprayed through the flat dispersion cover 18 and the flat jet nozzle 19 to the upper right end of the bottom belt conveyor 10. The high-temperature airflow heats and dries the masterbatch spread on the belt from right to left above the bottom belt conveyor 10. Then, the left booster fan 22 heats and dries the masterbatch spread on the belt of the middle belt conveyor 10 from left to right above the middle belt conveyor 10 through the left flat booster nozzle 23. Next, the right booster fan 20 heats and dries the masterbatch spread on the belt of the upper belt conveyor 10 from right to left above the upper belt conveyor 10 through the right flat booster nozzle 21. Finally, the airflow carrying more moisture is discharged through the exhaust pipe 12 on the left side of the drying chamber 1.

[0024] The belt conveyor 10, the first drying device, the second drying device, the first valve 8, the second valve 9, the air heater 16, the high-pressure air pump 17, the right booster fan 20, and the left booster fan 22 in this utility model are all existing technologies and can be purchased on the market. Therefore, their specific structures and working principles will not be described in detail.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A belt conveyor pre-drying device for masterbatch pelleting in fiber production, characterized in that: The equipment includes a drying chamber with a support column at the bottom, a feed hopper on the top left side, and a discharge cone on the bottom right side. The lower end of the discharge cone is connected to a main discharge pipe. The front and rear sides of the main discharge pipe are respectively connected to an inclined first discharge branch pipe and a second discharge branch pipe. The lower ends of the first and second discharge branch pipes are respectively connected to the feed inlets at the top of the first and second drying devices. A first valve is installed on the first discharge branch pipe, and a second valve is installed on the second discharge branch pipe. N layers of belt conveyors are installed along the height direction inside the drying chamber, where N is an odd number greater than or equal to 3. The conveying direction of the N layers of belt conveyors forms a left-right reciprocating deflection conveying structure. The uppermost and lowermost belt conveyors both convey from left to right. A hot air inlet pipe is located on the lower right side of the drying chamber, to the right of the lowermost belt conveyor, and a moisture exhaust pipe is located on the upper left side of the drying chamber, to the left of the uppermost belt conveyor.

2. The belt conveyor pre-drying device for masterbatch pelleting in hair fiber production according to claim 1, characterized in that: The distance between the right end of the belt conveyor of the odd-numbered layers and the right side wall of the drying chamber is greater than that between the right end of the belt conveyor of the even-numbered layers and the right side wall of the drying chamber; the distance between the left end of the belt conveyor of the even-numbered layers and the left side wall of the drying chamber is greater than that between the left end of the belt conveyor of the odd-numbered layers and the left side wall of the drying chamber; the front and rear side walls of the drying chamber are equipped with windproof and particle-preventing soft brushes that slide in contact with the upper half of the belt of each belt conveyor. A left guide plate is fixed on the left side wall of the drying chamber, located at the top left side of the belt conveyor except for the top odd-numbered layers. The left guide plate is inclined with the left side higher than the right side, and the lower side of the left guide plate is provided with left bristles that slide in contact with the upper surface of the belt of the belt conveyor. The right guide plate of the belt conveyor with an even number of layers is fixed on the right side wall of the drying chamber. The right guide plate is inclined with the left side lower and the right side higher. The lower side of the right guide plate is provided with right bristles that slide in contact with the upper surface of the belt of the belt conveyor.

3. The belt conveyor pre-drying device for masterbatch pelleting in hair fiber production according to claim 1, characterized in that: An air heater is installed on the hot air inlet pipe. A high-pressure air pump is connected to the inlet of the hot air inlet pipe. A flat dispersion cover that is thinner on the left and thicker on the right, and wider on the left and narrower on the right, is connected to the outlet of the hot air inlet pipe. The flat dispersion cover extends into the drying chamber through the right side wall of the drying chamber. A flat jet nozzle that sprays air to the left is provided at the left end of the flat dispersion cover.

4. The belt conveyor pre-drying device for masterbatch pelleting in hair fiber production according to any one of claims 1-3, characterized in that: A right booster fan is fixed on the right side wall of the drying chamber, located above the right side of the belt conveyor except for the bottom odd-numbered layers. The air outlet pipe of the right booster fan is connected to a right flat booster nozzle that sprays air to the left. A left booster fan is fixed on the left side wall of the drying chamber, located above the left side of the belt conveyor on the even-numbered layer. The exhaust pipe of the left booster fan is connected to a left flat booster nozzle that sprays air to the right.

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