A kind of PA-GF processing strip water removal device

Abstract

A kind of PA-GF processing used by strip water removal device, belong to water removal equipment technical field, including strip electric traction equipment, still have temperature detection circuit, control circuit, heating water removal mechanism;Heating water removal mechanism includes insulating sleeve, metal conductive ring, metal conductive sheet, electric heating plate, electric heating plate is fixedly installed in traction wheel, sleeve is fixedly installed in traction wheel shaft rear outside;Two conductive rings are fixedly installed at interval distance in the outside end of sleeve, traction wheel shaft lower end is fixedly installed with insulating support seat, the lower end of two conductive sheets is fixedly installed at interval distance on support seat;Temperature detection circuit, control circuit are installed in electric control box and are connected by wire.This new strip is towed by two traction wheels towards front end simultaneously, the heat generated by two electric heating plates after heating traction wheel will act on the outer surface of strip, in this way, two rotating traction wheels will continuously remove water on the surface of strip, can reach better water removal effect, ensure the quality of strip product.

Description

Technical Field

[0001] This utility model relates to the technical field of dewatering equipment for extruders, and in particular to a dewatering device for PA-GF processing strips. Background Technology

[0002] PA-GF is a reinforced nylon material, where PA stands for nylon (Polyamide) and GF stands for glass fiber. PA-GF is nylon reinforced with glass fiber to improve its strength, stiffness, and other properties. The addition of glass fiber reduces nylon shrinkage, improves product precision, and enhances the material's strength and heat resistance. This material is commonly used in engineering applications requiring high strength, high stiffness, and good heat resistance, such as automotive parts, electronic device housings, and industrial equipment structural components. The production of PA-GF raw materials involves first blending and hot-extruding various raw materials using an extruder. The extruded molten material is then pulled by an electric traction device (a motor-driven reduction gear rotates a lower traction wheel, with an upper traction wheel following, and the material moves forward through the channel between the two traction wheels). After water cooling, the material is wound by an electric winding device and subsequently processed into pellets to provide raw materials for downstream production.

[0003] In actual production, to ensure the normal operation of the pelletizing process and meet the requirements for storage and drying, it is necessary to effectively remove water from the water-cooled PA-GF strips. Specifically, if the strips contain moisture, over time, this can lead to corrosion of the pelletizer, including the blades, resulting in contamination of the finished pellets and compromising product quality. Moisture also makes the pellets prone to clumping together after pelletizing, clogging the pelletizer's outlet and negatively impacting production progress. Excessive humidity during storage can affect the material's physical properties and mechanical strength, and may also cause mold or corrosion on the material surface, reducing its lifespan. Excessive moisture during processing can cause material decomposition or bubble formation, affecting the quality of the final product. Currently, the drying of PA-GF strips after extrusion typically uses a hot air system to blow away the moisture adhering to the strips. However, because the electric traction device pulls the strips at a high speed, and moisture inevitably adheres to all angles after cooling from the water-cooling equipment, hot air cannot guarantee complete drying from all angles. Therefore, providing a device that effectively removes moisture from the surface of PA-GF strips is highly necessary. Utility Model Content

[0004] In order to overcome the drawback that in the production of raw materials of existing PA-GF, after the strip is cooled by a water cooling device, the hot air mechanism cannot effectively ensure the removal of the moisture on the surface of the strip, the utility model provides a strip water removal device for PA-GF processing, which is used in combination with a hot air mechanism and is based on the traction wheel of the strip electric traction device. During production, the strip extruded by the extruder is cooled by the water cooling device and the moisture is preliminarily removed by the hot air mechanism, and then the surface of the strip can be dewatered by the rotating self-heating traction wheel, so that a better water removal effect can be achieved and the product quality is ensured.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows: A strip water removal device for PA-GF processing includes the strip electric traction device of the PA-GF processing equipment, and also has a temperature detection circuit, a control circuit, and a heating and water removal mechanism; the heating and water removal mechanism includes an insulating sleeve, a metal conductive ring, a metal conductive sheet, and an electric heating plate. The traction wheel and the traction wheel shaft of the strip electric traction device are of a hollow structure. The electric heating plate is fixedly installed inside the traction wheel, and the sleeve is fixedly installed on the outer side behind the traction wheel shaft; there are at least two conductive rings and conductive sheets respectively. The two conductive rings are fixedly installed at intervals on the outer side end of the sleeve. An insulating support seat is fixedly installed at the lower end of the traction wheel shaft. The lower ends of the two conductive sheets are fixedly installed on the support seat at intervals; the temperature detection circuit and the control circuit are installed in the electric control box; the signal output end of the temperature detection circuit and the signal input end of the control circuit are connected by a wire, and the power output end of the control circuit and the two conductive sheets of the heating and water removal mechanism are respectively connected by a wire.

[0006] Preferably, the outer sides of the conductive sheet and the conductive ring are in rotational electrical contact.

[0007] Preferably, a flange is fixedly installed on the outer side end behind one traction wheel shaft at the lower end of the strip electric traction device, and the flange is fixedly connected to the power output shaft of the motor reduction mechanism supporting the strip electric traction device.

[0008] Preferably, the temperature detection circuit includes a thermistor, a resistor, and an operational amplifier integrated circuit connected by a wire. The thermistor is installed at the front side end of the rear fixing seat. One end of the thermistor is connected to the positive power input end of the operational amplifier integrated circuit and one end of the first resistor. The other end of the first resistor is connected to one end of the second resistor and the inverting input end of the operational amplifier integrated circuit. The other end of the thermistor is connected to one end of the third resistor and the non-inverting input end of the operational amplifier integrated circuit. The negative power input end of the operational amplifier integrated circuit is connected to the other end of the third resistor.

[0009] Preferably, the control circuit includes a resistor, a triode, and a relay connected by a wire. One end of the resistor is connected to the base of the triode. The collector of the triode is connected to the negative power input end of the relay. The control power input end of the relay is connected to the positive power input end.

[0010] Compared with existing technologies, the advantages of this invention are as follows: This invention combines the hot air mechanism of PA-GF processing equipment with the traction wheels of the electric traction device for the material strip. During production, the extruded material strip is cooled by water cooling equipment and initially dehydrated by the hot air mechanism. It then enters the electric traction device between two traction wheels distributed vertically. While being pulled forward by the two traction wheels, the heat generated by the traction wheels after being heated by two electric heating plates acts on the outer surface of the material strip. In this way, the rotating two traction wheels continuously dehydrate the surface of the material strip, achieving a better dehydration effect and ensuring the quality of the finished product. Based on the above, this invention has good application prospects. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a partial structural diagram of the PA-GF processing equipment.

[0013] Figure 2 This utility model is shown in the overall structural diagram.

[0014] Figure 3 This is the circuit diagram of this utility model. Detailed Implementation

[0015] Figure 1 , 2As shown in Figure 3, a strip dewatering device for PA-GF processing includes a power supply mechanism E1, a strip electric traction device 1 for PA-GF processing equipment, and also has a temperature detection circuit 2, a control circuit 3, and a heating and dewatering mechanism. The temperature detection circuit 2, control circuit 3, and heating and dewatering mechanism are each provided in two sets. Each of the two traction wheels 101 of the strip electric traction device is equipped with a set of temperature detection circuit 2, control circuit 3, and heating and dewatering mechanism. The heating and dewatering mechanism includes an insulating sleeve 41, a copper conductive ring Q, a conductive sheet J, and an electric heating plate RT. The traction wheel 101 and traction wheel shaft 102 of the strip electric traction device are hollow structures, and the traction wheel shaft 102 and the traction wheel 101 are interconnected. The rear end of the traction wheel shaft 102 of the strip electric traction device is located at the rear outer end of the rear fixed seat 103 of the strip electric traction device. The electric heating plate RT is fixedly installed inside the traction wheel 101. The wire connected to the RT power input terminal is led out from inside the traction wheel shaft 102 and then out through the opening at the upper rear end of the traction wheel shaft 102. The sleeve 41 is fixedly installed on the outer rear end of the traction wheel shaft 102 and located at the outer rear end of the rear fixed seat 103. There are two conductive rings Q and two conductive plates J. The two conductive rings Q are fixedly installed on the outer end of the sleeve 41 with a front-to-back gap. The wire connected to the RT power input terminal of the electric heating plate is welded together with the opening at the upper rear end of the traction wheel shaft 101, the opening at the rear end of the sleeve 41, and the middle part of the inner side of the two conductive rings Q. An insulating support seat 42 is fixedly installed at the lower rear end of the two traction wheel shafts 102 of the material bar electric traction device. The lower ends of the two conductive plates J are fixedly installed on the right end of the support seat 42 with a front-to-back gap. The power supply mechanism E1, the temperature detection circuit 2, and the control circuit 3 are installed in the electrical control box 5 of the PA-GF processing equipment.

[0016] Figure 1 , 2As shown in Figure 3, the upper left side of the two conductive plates J and the right outer side of the two conductive rings Q are in rotational electrical contact. A flange 43 is fixedly installed on the rear outer end of one of the traction wheel shafts 102 at the lower end of the electric traction device for the material bar. The flange and the power output shaft of the motor reduction mechanism (not shown in the figure) of the electric traction device for the material bar are fixedly connected. The temperature detection circuit includes a thermistor T, resistors R1, R2, and R3 connected by wires, and an operational amplifier integrated circuit E2. Thermistor T is mounted on the right side of the front end of the rear mounting base, with a 1.5 mm gap between the heated surface of the thermistor T and the outer rear end of the traction wheel 101. One end of the thermistor T is connected to pin 7 of the positive power input terminal of the operational amplifier integrated circuit E2 and one end of the first resistor R2. The other end of the first resistor R2 is connected to one end of the second resistor R3 and pin 2 of the inverting input terminal of the operational amplifier integrated circuit E2. The other end of the thermistor T is connected to one end of the third resistor R1 and pin 3 of the non-inverting input terminal of the operational amplifier integrated circuit E2. Pin 4 of the negative power input terminal of the operational amplifier integrated circuit E2 is connected to the other end of the third resistor R1. The control circuit includes a resistor R4, a transistor T, and a relay K connected by circuit board wiring. One end of resistor R4 is connected to the base of transistor T. The collector of transistor T is connected to the negative power input terminal of relay K. The control power input terminal of relay K is connected to the positive power input terminal. The power input terminals 1 and 2 of the power supply mechanism E1 are connected to the two poles of the AC 220V power supply via wires. The power output terminals 3 and 4 of the power supply module E1 are connected to the power input terminals of the two temperature detection circuits, the operational amplifier integrated circuits E2 (pins 7 and 4), the control circuit (positive power input terminal of relay K), and the emitter of transistor T via wires. The signal output terminal of each temperature detection circuit (pin 6 of operational amplifier integrated circuit E2) is connected to the signal input terminal of each control circuit (the other end of resistor R4) via wires. The normally closed contact of the power output terminal of the two control circuits, the power module E1 (pin 4), and the lower ends of the two conductive plates J of the two heating and dehydration mechanisms are connected via wires. Figure 3 In the configuration, power module E1 is an AC 220V to DC 24V power module; operational amplifier integrated circuit E2 is model UA741; transistor T is model 9013; relay K is a DC 24V relay; thermistor T is a negative temperature coefficient thermistor model NTC103D; electric heating plate RT is a PTC ceramic electric heating plate (power 1KW); resistors R1, R2, R3, and R4 have resistance values ​​of 4.7K, 10K, 5K, and 4.7K respectively.

[0017] Figure 1 , 2As shown in Figure 3, this new type of material is used in conjunction with the hot air mechanism 6 of the PA-GF processing equipment. Based on the traction wheel 101 of the electric traction device for the material strip, during production, the material strip 7 extruded by the extruder is cooled by the water cooling device 8 and initially removed by the hot air mechanism 6. Then, it enters between the two traction wheels 101 distributed vertically on the electric traction device for the material strip. While being pulled towards the front end by the two traction wheels 101, the heat generated by the traction wheels 101 after being heated by the two electric heating plates RT acts on the outer surface of the material strip 7. In this way, the two rotating traction wheels 101 continuously remove water from the surface of the material strip 7, achieving a better water removal effect and ensuring the quality of the material strip 7 product. Specifically, after the AC 220V power supply enters the power input terminal of the power module E1, the power module E1 outputs a stable DC 24V power supply from pins 3 and 4, which enters the power input terminals of multiple temperature detection circuits and control circuits. In each temperature detection and control circuit, when the temperature of the corresponding traction wheel 101 does not exceed the limit (e.g., not exceeding 120℃), the temperature of the sensing surface of the corresponding thermistor T, which is located on the outer end of the rotating traction wheel 101, is relatively low. Consequently, the resistance of the thermistor T is relatively high, resulting in a relatively large voltage division between it and resistor R1. Therefore, the voltage at pin 3 of the non-inverting input of the operational amplifier integrated circuit E2, after voltage division by the thermistor T and resistor R1, is less than the voltage at pin 2 of the inverting input (the voltage at pin 3 of the non-inverting input of the 24V power supply after voltage division by resistors R2 and R3). When the input is pin 2 of the operational amplifier integrated circuit E2, pin 6 of the operational amplifier integrated circuit E2 outputs a low level, the relay K will not be energized and its control power input terminal and normally closed contact terminal will be closed. The 24V power supply continues to enter the power input terminal of the electric heating plate RT in the corresponding traction wheel through the two conductive plates J and the two conductive rings Q. The electric heating plate RT continues to be energized and heats up the traction wheel to ensure the required temperature for dewatering the material strip (the power output from the conductive plates is transmitted to the electric heating plate RT through the rotating contact conductive ring, so that the electric heating plate RT, which rotates with the traction wheel, can reliably be energized and work).In each temperature detection and control circuit, when the temperature of a corresponding traction wheel 101 exceeds the limit (e.g., exceeding 120℃), the temperature of the sensing surface of the corresponding thermistor T, which is located on the outer rear end of the rotating traction wheel 101, is relatively high. Consequently, the resistance of the thermistor T is relatively low, and the voltage drop between it and resistor R1 is relatively small. Therefore, the voltage at the non-inverting input of the operational amplifier integrated circuit E2, after voltage division by the thermistor T and resistor R1, is greater than the voltage at pin 2 of the inverting input (the 24V power supply enters the operational amplifier integrated circuit after voltage division by resistors R2 and R3). Pin 2 of the E2 op-amp integrated circuit outputs a high level. This high level is stepped down and current-limited by resistor R4, entering the base of transistor T. Transistor T conducts, and its collector outputs a low level, which enters the negative power input terminal of relay K. Relay K is energized and its control power input terminal and normally open contact terminal are opened. In this way, the 24V power supply no longer enters the power input terminal of the electric heating plate RT in the corresponding traction wheel through the two conductive plates J and the two conductive rings Q. The electric heating plate RT temporarily stops receiving power and heating, and temporarily stops heating the traction wheel, preventing the material strip dewatering temperature from becoming too high. Through the above, this new invention can maintain the traction wheel at a suitable temperature for dewatering the material strip.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0019] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A strip water removal device for use in PA-GF processing, comprising a strip electric traction device of a PA-GF processing plant, characterized in that, It also includes a temperature detection circuit, a control circuit, and a heating and dehydration mechanism. The heating and dehydration mechanism includes an insulating sleeve, a metal conductive ring, a metal conductive sheet, and an electric heating plate. The traction wheel and traction wheel axle of the electric traction device for the material bar are hollow structures. The electric heating plate is fixedly installed inside the traction wheel, and the sleeve is fixedly installed on the rear outer side of the traction wheel axle. There are at least two conductive rings and at least two conductive sheets. The two conductive rings are fixedly installed at a distance from each other on the outer end of the sleeve. An insulating support seat is fixedly installed at the lower end of the traction wheel axle, and the lower ends of the two conductive sheets are fixedly installed on the support seat at a distance from each other. The temperature detection circuit and the control circuit are installed in an electrical control box. The signal output terminal of the temperature detection circuit and the signal input terminal of the control circuit are connected by wires, and the power output terminal of the control circuit and the two conductive sheets of the heating and dehydration mechanism are connected by wires.

2. A water removal device for use in PA-GF processing according to claim 1, characterized in that The conductive sheet and the outer side of the conductive ring make rotational electrical contact.

3. The material strip dewatering device for PA-GF processing according to claim 1, characterized in that, A flange is fixedly installed on the rear outer end of one of the traction wheel axles at the lower end of the electric traction device for material bars. The flange is fixedly connected to the power output shaft of the motor reduction mechanism that is matched with the electric traction device for material bars.

4. The water removal device for PA-GF processing according to claim 1, wherein The temperature detection circuit includes a thermistor, a resistor, and an operational amplifier integrated circuit connected by wires. The thermistor is mounted on the front side of the rear mounting bracket. One end of the thermistor is connected to the positive power input terminal of the operational amplifier integrated circuit and one end of the first resistor. The other end of the first resistor is connected to one end of the second resistor and the inverting input terminal of the operational amplifier integrated circuit. The other end of the thermistor is connected to one end of the third resistor and the non-inverting input terminal of the operational amplifier integrated circuit. The negative power input terminal of the operational amplifier integrated circuit is connected to the other end of the third resistor.

5. The water removal device for PA-GF processing according to claim 1, wherein The control circuit includes a resistor, a transistor, and a relay connected by wires. One end of the resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power input terminal of the relay, and the control power input terminal of the relay is connected to the positive power input terminal.

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