A friction granulator grinding head positioning control mechanism

Abstract

The utility model discloses a kind of friction polygranulator grinding head positioning control mechanisms in the field of spandex staple waste silk processing, including shell, adjusting pivot is provided in shell, the end of adjusting pivot extends shell, the part of adjusting pivot extension shell is equipped with transmission wheel one, the top of shell is provided with rotary drive mechanism, the output of rotary drive mechanism is equipped with transmission wheel two, transmission wheel two is transmission connection with transmission wheel one by transmission part, mounting bracket is connected on the shell, encoder is installed on adjusting pivot corresponding mounting bracket, the extension end of adjusting pivot is transmission connection with encoder. The utility model uses the mode of encoder digital positioning to determine grinding head position, avoid the damage of equipment caused by too small grinding head gap, to reach the purpose of stable production.

Description

Technical Field

[0001] This utility model belongs to the field of polyester staple fiber waste filament treatment, and specifically relates to a positioning control mechanism for a friction pelletizer grinding head. Background Technology

[0002] A friction pelletizer is a mechanical device that uses the heat generated by high-speed friction between plastic materials and between the materials and the equipment to melt the plastic, extrude it through a die, and then cut it into uniform plastic pellets by a cutter. Friction pelletizers can recycle various waste fibers and waste plastics, such as polypropylene, polyester, and nylon, and can also recycle and granulate waste foam plastics, waste films, and waste membranes. Waste fibers enter between a moving grinding disc and a stationary grinding disc, where they are melted and slurried through friction.

[0003] The friction pellet mill uses a gear and rack mechanism to adjust the position of the stationary grinding head, thereby adjusting the gap between the moving and stationary grinding heads. The gear shaft extends out of the machine housing and has a handwheel; the operator rotates the handwheel to adjust the gap. Currently, adjusting the moving and stationary grinding heads involves a camera displaying their positions, with manual adjustment based on experience. The problems are: the camera frequently malfunctions due to the high temperature at the grinding head, resulting in unclear display; additionally, inconsistent operator experience leads to overcurrent jamming of the grinding head motor and severe grinding head wear, increasing equipment maintenance costs and the workload of mechanics, while also reducing equipment operating rate and increasing the cost of waste fiber pellet production. Utility Model Content

[0004] The purpose of this invention is to provide a grinding head positioning control mechanism for a friction pellet mill, which can solve the problem of uncertainty in adjusting the grinding head advance and retreat gap based on experience. It uses encoder digital positioning to determine the grinding head position, avoiding equipment damage caused by excessively small grinding head gap, thereby achieving the goal of stable production.

[0005] The purpose of this utility model is achieved as follows: A positioning control mechanism for a friction pellet mill grinding head includes a housing, an adjusting shaft is provided inside the housing, the end of the adjusting shaft extends out of the housing, a transmission wheel is fitted on the part of the adjusting shaft extending out of the housing, a rotary drive mechanism is provided on the top of the housing, a transmission wheel is provided at the output end of the rotary drive mechanism, the transmission wheel is connected to the transmission wheel via a transmission component, a mounting bracket is connected to the housing, an encoder is mounted on the mounting bracket corresponding to the adjusting shaft, and the extended end of the adjusting shaft is connected to the encoder.

[0006] In operation, this invention uses an adjusting motor (forward / reverse motor) to drive a second transmission wheel to rotate. The second transmission wheel, through a transmission component, drives a first transmission wheel to rotate. The first transmission wheel controls the rotation of the adjusting shaft, thereby adjusting the gap between the moving and stationary grinding heads. An encoder monitors the circumferential position of the second transmission wheel and the adjusting shaft during rotation. Signals from the encoder mounted on the adjusting motor are sent to a PLC, which calculates and determines the grinding head position. The PLC is programmed to limit the grinding head's forward and backward movement, controlling the motor's movement based on the acquired position signals. The operator simply presses the forward or backward button until the motor stops. Simultaneously, the grinding head's limits can be adjusted based on wear conditions to meet normal production needs. Compared to existing technologies, this invention offers the following advantages: controlling the circumferential position of the adjusting shaft using an adjusting motor and encoder replaces manual handwheel control, resulting in more precise control. This new technology reduces grinding head wear, extends the grinding head's lifespan, lowers maintenance costs and equipment failure rates, thereby improving equipment uptime.

[0007] As a further improvement of this utility model, both the first and second transmission wheels are sprockets, and the transmission component is a chain.

[0008] As a further improvement of this utility model, a protective cover is provided corresponding to the first transmission wheel, the second transmission wheel, and the transmission component. The protective cover is fixedly connected to the machine housing. The protective cover protects the sprocket mechanism and is fixed to the machine housing and the adjusting motor.

[0009] As a further improvement of this utility model, the rotary drive mechanism is an adjustable motor installed on the top of the housing, the transmission wheel is sleeved on the output shaft of the adjustable motor, the protective cover has a through hole one that allows the output shaft of the adjustable motor to extend into, and the front and rear sides of the protective cover have through holes two and three that allow the adjustable rotating shaft to pass through.

[0010] As a further improvement of this utility model, the mounting bracket includes two side bracket plates respectively fixed to the left and right sides of the housing. The two side bracket plates are respectively arranged corresponding to the left and right sides of the protective cover. A transverse front bracket plate is provided between the ends of the two side bracket plates. Both ends of the front bracket plate are provided with bent plates, and the two bent plates are respectively fixedly connected to the side bracket plates by fasteners. The side bracket plates extend forward at an angle, and the encoder is mounted through the front bracket plate.

[0011] As a further improvement of this utility model, the encoder is model TRD-211024BF, and both the encoder and the regulating motor are connected to the PLC control system. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 Front view of the protective cover and mounting bracket.

[0014] Figure 3 Top view of the encoder on the mounting bracket for adjusting the shaft.

[0015] Figure 4 for Figure 1 A magnified view of a portion of the image.

[0016] Figure 5 This is a schematic diagram of the PLC control system of this utility model.

[0017] The components include: 1. Housing; 2. Adjustment shaft; 3. Transmission wheel one; 4. Transmission wheel two; 5. Transmission component; 6. Mounting bracket; 6a. Side bracket plate; 6b. Front bracket plate; 6b1. Bending plate; 7. Encoder; 8. Protective cover; 9. Adjustment motor; 10. Through hole one; 11. Through hole two; 12. Through hole three. Detailed Implementation

[0018] like Figure 1-4 As shown, a positioning control mechanism for a friction pellet mill head includes a housing 1, an adjusting shaft 2 inside the housing 1, an end of the adjusting shaft 2 extending out of the housing 1, a transmission wheel 3 fitted onto the portion of the adjusting shaft 2 extending out of the housing 1, a rotary drive mechanism on the top of the housing 1, a transmission wheel 4 at the output end of the rotary drive mechanism, the transmission wheel 4 being connected to the transmission wheel 3 via a transmission component 5, a mounting bracket 6 connected to the housing 1, an encoder 7 mounted on the mounting bracket 6 corresponding to the adjusting shaft 2, and the extended end of the adjusting shaft 2 being connected to the encoder 7.

[0019] Both transmission wheel 3 and transmission wheel 4 are sprockets, and transmission component 5 is a chain. A protective cover 8 is provided corresponding to transmission wheel 3, transmission wheel 4, and transmission component 5, and the protective cover 8 is fixedly connected to the housing 1. The protective cover 8 protects the sprocket mechanism and is fixed to the housing 1 and the adjusting motor 9. The rotary drive mechanism is the adjusting motor 9 mounted on the top of the housing 1. Transmission wheel 4 is sleeved on the output shaft of the adjusting motor 9. The protective cover 8 has a through hole 10 that allows the output shaft of the adjusting motor 9 to extend into it. Through holes 11 and 12, respectively, are provided on the front and rear sides of the protective cover 8 to allow the adjusting shaft 2 to pass through.

[0020] The mounting bracket 6 includes two side bracket plates 6a, which are fixed to the left and right sides of the housing 1, respectively. The two side bracket plates 6a are respectively arranged to correspond to the left and right sides of the protective cover 8. A transverse front bracket plate 6b is provided between the ends of the two side bracket plates 6a. Both ends of the front bracket plate 6b are provided with bent plates 6b1, and the two bent plates 6b1 are fixedly connected to the side bracket plates 6a by fasteners. The side bracket plates 6a extend forward at an angle, and the encoder 7 is mounted through the front bracket plate 6b.

[0021] The encoder 7 is model TRD-211024BF. Both encoder 7 and regulating motor 9 are connected to the PLC control system. Figure 5 The PLC control system is a Mitsubishi FX3U, the friction pellet mill has a power of 110KW, and the encoder 7 and the regulating motor 9 are both connected to the PLC control system. The encoder 7 of the forward and backward motor collects the position signal to the X point of the PLC. The PLC performs calculations and limit comparisons through programming to determine whether the grinding head can move forward or backward. The PLC system realizes the control of the friction pellet mill (equipment status, equipment start and stop, grinding head position).

[0022] In operation, this invention uses an adjusting motor 9 (forward / backward motor) to drive the transmission wheel 4 to rotate. The transmission wheel 4, through the transmission component 5, drives the transmission wheel 3 to rotate. The transmission wheel 3 controls the rotation of the adjusting shaft 2, thereby adjusting the gap between the moving and stationary grinding heads. An encoder 7 monitors the circumferential position of the transmission wheel 4 and the adjusting shaft 2 during rotation. The encoder 7, mounted on the adjusting motor 9 (forward / backward motor), collects signals and sends them to the PLC. The PLC calculates and determines the position of the grinding head. The PLC programs the forward and backward limits of the grinding head, controlling whether the grinding head motor can move forward or backward based on the collected position signals. The operator only needs to press the forward or backward button until the forward / backward motor stops. Simultaneously, the grinding head limits can be adjusted according to the wear and tear of the grinding head during production to meet the needs of normal production. The advantages of this utility model are as follows: by adjusting the motor 9 and the encoder 7, the circumferential position of the rotating shaft 2 is controlled, replacing the manual control of the rotation state of the rotating shaft 2 by handwheel, and the control is more precise; after the new technology is adopted, the wear of the grinding head is reduced, the service life of the grinding head is extended, the maintenance cost and equipment failure rate are reduced, thereby achieving the goal of improving the equipment operating rate.

[0023] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A positioning control mechanism for a friction pelletizer grinding head, comprising a housing, an adjusting shaft disposed within the housing, the end of the adjusting shaft extending out of the housing, characterized in that, The portion of the adjusting shaft extending out of the housing is fitted with a transmission wheel one. A rotary drive mechanism is provided on the top of the housing. The output end of the rotary drive mechanism is provided with a transmission wheel two. The transmission wheel two is connected to the transmission wheel one via a transmission component. A mounting bracket is connected to the housing. An encoder is mounted on the mounting bracket corresponding to the adjusting shaft. The extended end of the adjusting shaft is connected to the encoder.

2. The positioning and control mechanism for a friction pelletizer grinding head according to claim 1, characterized in that, Both drive wheel one and drive wheel two are sprockets, and the transmission component is a chain.

3. The positioning and control mechanism for a friction pelletizer grinding head according to claim 2, characterized in that, A protective cover is provided corresponding to the first transmission wheel, the second transmission wheel, and the transmission component, and the protective cover is fixedly connected to the machine housing.

4. The positioning control mechanism for a friction pelletizer grinding head according to claim 3, characterized in that, The rotary drive mechanism is an adjustable motor installed on the top of the housing. The transmission wheel is sleeved on the output shaft of the adjustable motor. The protective cover has a through hole 1 that allows the output shaft of the adjustable motor to extend into it. The front and rear sides of the protective cover have through holes 2 and 3 that allow the adjustable shaft to pass through, respectively.

5. A positioning control mechanism for a friction pelletizer grinding head according to any one of claims 1-4, characterized in that, The mounting bracket includes two side bracket plates that are fixed to the left and right sides of the housing respectively. The two side bracket plates are respectively set to correspond to the left and right sides of the cover. A transverse front bracket plate is set between the ends of the two side bracket plates. Both ends of the front bracket plate are provided with bent plates. The two bent plates are fixedly connected to the side bracket plates by fasteners.

6. The positioning control mechanism for a friction pelletizer grinding head according to claim 4, characterized in that, The encoder is model TRD-211024BF, and both the encoder and the regulating motor are connected to the PLC control system.

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