A hot and cold dual-purpose grinding disc for plastic granulator

Abstract

The present invention provides a hot and cold dual-purpose grinding disc for a plastic granulator, including a grinding disc arranged at the bottom of a granulating die barrel, an air flow channel for gas circulation in the grinding disc, an air inlet and an air outlet connected to the air flow channel, the air inlet and the air outlet are connected to an air inlet pipe and an air outlet pipe respectively, a fan is also included, the air outlet of the fan is connected to the air inlet pipe, a four-way pipe is also included, the air outlet pipe and the air inlet of the fan are connected to the four-way pipe respectively, the air inlet pipe, the air flow channel and the air outlet pipe form an air flow internal circulation channel through the four-way pipe, and the air flow is driven to circulate in the internal circulation channel by the fan. The temperature of the grinding disc is controlled by the flow of air flow, a heating mechanism is added, and when the material needs to be operated at a high temperature, the grinding disc is quickly heated by the heating mechanism to reach the required temperature, and water resources are not wasted and pollution is not caused, which is very practical.

Description

Technical Field

[0001] The invention relates to a plastic granulator, in particular to a cold and hot dual-purpose grinding disc of the plastic granulator. Background Art

[0002] A plastic granulator is a device used to process the scraps of products into plastic particles, in which the grinding disc is used to cooperate with the extrusion scraper to rub and heat to melt the material, thereby extruding and cutting the material to form plastic particles. Since the grinding disc will form high temperature when rubbing against the extrusion scraper, too high or too low temperature will affect product processing, and materials of different materials need to be processed at different temperatures, so temperature control is extremely important. The grinding discs in existing plastic granulators are all water-cooled, and the temperature control is difficult to control, and it wastes water resources and has many disadvantages. Therefore, a hot and cold dual-purpose grinding disc for plastic granulators is needed to solve these problems. Summary of the invention

[0003] In view of the deficiencies in the existing technology, the present invention provides a hot and cold dual-purpose grinding disc for a plastic granulator.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a hot and cold dual-purpose grinding disc for a plastic granulator, comprising a grinding disc arranged at the bottom of a granulation die barrel, an air flow channel for gas circulation is provided in the grinding disc, the grinding disc also has an air inlet and an air outlet connected to the air flow channel, the air inlet and the air outlet are respectively connected to the air inlet pipe and the air outlet pipe, and also includes a fan, the air outlet of the fan is connected to the air inlet pipe, the air inlet pipe, the air outlet pipe and the air flow channel have an inner air circulation channel and an outer air circulation channel, and the inner air circulation channel and the outer air circulation channel are switched by cutting off or connecting the air inlet pipe and the air outlet pipe.

[0005] It also includes a four-way pipe, which includes a first pipe port, a second pipe port, a third pipe port and a fourth pipe port. The air inlet of the fan is connected to the first pipe port, and the air outlet pipe is connected to the second pipe port. A switching valve is provided in the four-way pipe for switching the second pipe port to be connected to the first pipe port or to the third pipe port. A control valve is provided at the fourth pipe port for controlling the opening and closing of the fourth pipe port. When the control valve is closed, the fourth pipe port is closed, and the switching valve switches the second pipe port to be connected to the first pipe port to form an internal circulation channel for air flow.

[0006] When the switching valve in the four-way pipe is switched to connect the second pipe port and the third pipe port, the second pipe port is closed with the first pipe port, the control valve controls the fourth pipe port to open, and the air inlet pipe, the air flow channel and the air outlet pipe form an air flow external circulation channel through the four-way pipe.

[0007] It also includes a heating mechanism, which is arranged at any position of the air intake pipeline or at the air intake of the grinding disc.

[0008] The heating mechanism is arranged in the air intake duct and is provided with a temperature control switch.

[0009] It also includes a temperature sensor for monitoring the temperature of the grinding disc. The temperature sensor is arranged in the grinding disc. The temperature sensor is electrically connected to a temperature control switch. When the temperature sensed by the temperature sensor reaches a set value, the temperature control switch controls the heating mechanism to turn off.

[0010] The heating mechanism is an electric heating wire, an electric heating plate or an electric heating sheet.

[0011] The upper surface of the grinding disc is provided with a plurality of regularly arranged protrusions or grooves.

[0012] The air inlet pipe and the air outlet pipe are both made of high temperature resistant materials, and a layer of heat insulation material is provided on the outer surface of the pipe.

[0013] The grinding disc has a cavity inside, and the temperature sensor is arranged in contact with the surface of the grinding disc.

[0014] The beneficial effects of the present invention are as follows: the present invention provides a hot and cold dual-purpose grinding disc for a plastic granulator, which controls the temperature of the grinding disc by air flow, and adds a heating mechanism. For materials that require auxiliary heating operations, the grinding disc is quickly heated by the heating mechanism to reach the required temperature, and two air flow channels, an internal circulation channel and an external circulation channel, are provided. When auxiliary heating operations are required, the internal hot air flow is circulated through the internal circulation channel to quickly increase the temperature. When cooling is required, the temperature is continuously cooled through the external circulation channel, and the heating temperature of the heating mechanism can be controlled. A temperature sensor is also provided to prevent the material from being unable to be processed normally due to excessively high or low temperature, and it does not waste water resources or cause pollution, and is very practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a schematic diagram of the airflow channel structure of the present invention;

[0017] Figure 3 It is a state diagram of a four-way pipeline in the internal circulation state of the present invention;

[0018] Figure 4 It is a state diagram of the four-way pipeline in the external circulation state of the present invention. DETAILED DESCRIPTION

[0019] like Figure 1 to Figure 4As shown, a hot and cold dual-purpose grinding disc 100 for a plastic granulator comprises a grinding disc 100 arranged at the bottom of a granulating die barrel, wherein an air flow channel 110 for gas circulation is arranged in the grinding disc 100, wherein the grinding disc 100 further comprises an air inlet 120 and an air outlet 130 connected to the air flow channel 110, wherein the air inlet 120 and the air outlet 130 are connected to an air inlet pipe 200 and an air outlet pipe 300 respectively, and further comprises a fan 400, wherein the air outlet of the fan 400 is connected to the air inlet pipe 200, wherein the air inlet pipe 200, the air outlet pipe 300 and the air flow channel 110 have an inner air flow circulation channel and an outer air flow circulation channel, wherein the inner air flow circulation channel and the outer air flow circulation channel are connected to the air inlet pipe 200, the air outlet pipe 300 and the air flow channel 110 respectively ... The air inlet duct 200 and the air outlet duct 300 are switched by being disconnected or connected. When the air inlet duct 200 and the air outlet duct 300 are connected, an inner circulation channel for air flow is formed, and when they are disconnected, an outer circulation channel for air flow is formed. The air inlet duct 200 and the air outlet duct 300 can be disconnected and connected by manual plugging and unplugging or other switching valves and other devices. The traditional grinding wheel 100 adopts water cooling, which can only achieve cooling but cannot accelerate the temperature increase, and the temperature is difficult to control, and there are many defects. The air cooling method is first adopted to quickly and efficiently cool the grinding wheel 100, and the air flow is driven by the fan 400 to flow in the air flow channel 110 to achieve cooling, which will not waste water resources and will not cause environmental pollution.

[0020] The four-way pipe 500 also includes a first pipe opening 510, a second pipe opening 520, a third pipe opening 530 and a fourth pipe opening 540. The air inlet of the fan 400 is connected to the first pipe opening 510, and the air outlet pipe 300 is connected to the second pipe opening 520. A switching valve 550 is provided in the four-way pipe 500 for switching the second pipe opening 520 to be connected to the first pipe opening 510 or to be connected to the third pipe opening 530. The fourth pipe opening 540 is provided with a control valve 560 for controlling the opening and closing of the fourth pipe opening 540. When the control valve 560 is closed, the air inlet of the fan 400 is connected to the first pipe opening 510, and the air outlet pipe 300 is connected to the second pipe opening 520. When closed, the fourth pipe port 540 is closed, and the switching valve 550 switches the second pipe port 520 to connect with the first pipe port 510 to form an internal circulation channel for air flow. The internal circulation channel for air flow is used for heating the grinding disc 100. The switching valve 550 and the control valve 560 control the four-way pipe 500, so that the air inlet pipe 200, the air outlet pipe 300 and the air flow channel 110 of the grinding disc 100 form a closed circulation channel, and the air flow is continuously driven to flow in the channel by the fan 400, and the air flow is heated by the heating device to quickly increase the temperature of the grinding disc 100 and improve the processing efficiency.

[0021] When the switching valve 550 in the four-way pipe 500 is switched to connect the second pipe port 520 and the third pipe port 530, the second pipe port 520 is closed with the first pipe port 510, and the control valve 560 controls the fourth pipe port 540 to be opened. The air intake pipe 200, the air flow channel 110 and the air outlet pipe form an air flow external circulation channel through the four-way pipe 500. The air intake pipe 200 and the air outlet pipe 300 are connected to the outside world through the switching valve 550 and the control valve 560 to form an external circulation channel, which is mainly used for quickly cooling the grinding disc 100 to keep its temperature within a certain value. Due to the material characteristics of some materials, it cannot be Processing is performed under high temperature environment, otherwise the molecular structure of the material will be damaged and the granulation effect will be affected. Therefore, temperature control is very important. Since the grinding disc 100 will continue to generate temperature when rubbing against the extrusion scraper, the temperature will gradually increase. Therefore, the grinding disc 100 needs to be cooled to ensure that its processing temperature is within the appropriate range. The traditional water cooling method requires water to flow continuously in the circulation channel, and the machine can work continuously for dozens of hours. It is unrealistic to use water cooling without sufficient cold water resources. Even if there are enough water resources, the outflow of heated water will cause waste of water resources, high cost, and very impractical.

[0022] It also includes a heating mechanism 600, which is arranged at any part of the air intake duct 200 or at the air inlet 120 of the grinding disc 100. The heating mechanism 600 can be internal or external. Generally, it is better to adopt an external method to facilitate the repair and maintenance of the heating mechanism 600. The temperature in the air flow channel 110 can be quickly increased by the heating mechanism 600, so that the grinding disc 100 can be quickly heated to the required temperature. If the temperature is too high, the heating mechanism 600 can be turned off and switched to the external circulation channel to reduce the temperature of the grinding disc 100.

[0023] The heating mechanism 600 is arranged in the air intake duct 200, and the heating mechanism 600 is provided with a temperature control switch 610. The temperature control switch 610 can be manually controlled and can be controlled by an internal circuit board to set the rated temperature, heating time, etc. It is a relatively mature technology at present and will not be elaborated in detail.

[0024] It also includes a temperature sensor 700 for monitoring the temperature of the grinding disc 100. The temperature sensor 700 is arranged in the grinding disc 100. The temperature sensor 700 is electrically connected to the temperature control switch 610. When the temperature sensed by the temperature sensor 700 reaches the set value, the temperature control switch 610 controls the heating mechanism 600 to be turned off. The temperature sensor 700 can monitor the temperature of the grinding disc 100 in real time, and then transmit a signal to the temperature control switch 610 to control the opening and closing of the heating mechanism 600. At the same time, it can also control the opening and closing of the switching valve 550 and the control valve 560. The control valve 560 and the switching valve 550 can be controlled to open and close by an electric actuator, or manually. The specific control methods are currently very mature technologies and will not be described in detail.

[0025] The heating mechanism 600 is an electric heating wire, an electric heating plate or an electric heating sheet. The heating mechanism 600 preferably adopts the above-mentioned methods, which mainly plays the role of heating the airflow, and no further description is given for this.

[0026] The upper surface of the grinding disc 100 is provided with a plurality of regularly arranged protrusions or grooves. The protrusions or grooves on the surface of the grinding disc 100 are provided to cooperate with the friction heating of the extrusion scraper, and also increase the contact area between the surface of the grinding disc 100 and the material, thereby improving the heating effect. Similarly, the contact area with the airflow in the airflow channel 110 is also increased, and heating or cooling becomes more efficient.

[0027] The air inlet duct 200 and the air outlet duct 300 are both made of high-temperature resistant materials, and a layer of thermal insulation material is provided on the outer surface of the duct (not shown). Since the temperature of the air flow flowing in the air inlet duct 200 and the air outlet duct 300 is relatively high, in order to avoid damage to the duct, they are made of high-temperature resistant materials. Adding a thermal insulation material layer also avoids scalding of the staff. There is no limitation on the specific material used, as long as the material is resistant to high temperatures and can effectively insulate.

[0028] The grinding disc 100 has a cavity therein, and the temperature sensor 700 is arranged in contact with the surface of the grinding disc 100, so that the cold airflow or hot airflow in the airflow channel 110 can more fully contact the grinding disc 100, thereby improving the heating or cooling effect. The temperature sensor 700 is arranged in contact with the surface of the grinding disc 100, and can monitor the temperature more accurately.

[0029] It should be noted that the air inlet of the fan 400, that is, the fourth pipe outlet 540, needs to be connected through a pipe to a range that does not affect the activities of the staff, and a filter needs to be installed at the pipe outlet to avoid the inhalation of impurities. It is best to set the pipe outlet in the air so that dust will not be inhaled; and the air outlet of the four-way pipe 500, that is, the third pipe outlet 530, also needs to be connected through a pipe to a range that does not affect the activities of the staff, so that the exhausted hot air will not affect the indoor temperature and will not cause scalding accidents.

[0030] The beneficial effects of the present invention are as follows: the present invention provides a hot and cold dual-purpose grinding disc for a plastic granulator, which controls the temperature of the grinding disc by air flow, and adds a heating mechanism. For materials that require high-temperature operation, the grinding disc is quickly heated by the heating mechanism to reach the required temperature, and two air flow channels, an internal circulation channel and an external circulation channel, are provided. When high-temperature operation is required, the internal hot air flow is circulated through the internal circulation channel to quickly increase the temperature. When cooling is required, the temperature is continuously cooled through the external circulation channel, and the heating temperature of the heating mechanism can be controlled. A temperature sensor is also provided to prevent the material from being unable to be processed normally due to excessively high or low temperature, and it does not waste water resources or cause pollution, and is very practical.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, simple changes and substitutions by ordinary technicians in the field are within the protection scope of the present invention.

Claims

1. A hot and cold dual-purpose grinding disc for a plastic granulator, comprising a grinding disc arranged at the bottom of a granulation die, characterized in that: The grinding disc is provided with an air flow channel for gas circulation, and the grinding disc also has an air inlet and an air outlet connected to the air flow channel, and the air inlet and the air outlet are connected to the air inlet pipe and the air outlet pipe respectively, and also includes a fan, the air outlet of the fan is connected to the air inlet pipe, the air inlet pipe, the air outlet pipe and the air flow channel have an inner air circulation channel and an outer air circulation channel, and the inner air circulation channel and the outer air circulation channel are switched by cutting off or connecting the air inlet pipe and the air outlet pipe; it also includes a four-way pipe, the four-way pipe includes a first pipe opening, a second pipe opening, a third pipe opening and a fourth pipe opening, the air inlet of the fan is connected to the first pipe opening, and the air outlet pipe is connected to the second pipe opening The four-way pipe is provided with a switching valve for switching the second pipe port to be connected with the first pipe port or the third pipe port, and the fourth pipe port is provided with a control valve for controlling the opening and closing of the fourth pipe port. When the control valve is closed, the fourth pipe port is closed, and the switching valve switches the second pipe port to be connected with the first pipe port to form an internal air circulation channel; when the switching valve in the four-way pipe is switched to connect the second pipe port and the third pipe port, the second pipe port is closed with the first pipe port, and the control valve controls the fourth pipe port to open, and the air intake pipe, the air flow channel and the air outlet pipe form an external air circulation channel through the four-way pipe; and also includes a heating mechanism, and the heating mechanism is arranged at any part of the air intake pipe or at the air intake of the grinding disc.

2. A hot and cold dual-purpose grinding disc for a plastic granulator as claimed in claim 1, characterized in that: The heating mechanism is arranged in the air intake duct and is provided with a temperature control switch.

3. A hot and cold dual-purpose grinding disc for a plastic granulator as claimed in claim 2, characterized in that: It also includes a temperature sensor for monitoring the temperature of the grinding disc. The temperature sensor is arranged in the grinding disc. The temperature sensor is electrically connected to a temperature control switch. When the temperature sensed by the temperature sensor reaches a set value, the temperature control switch controls the heating mechanism to turn off.

4. A hot and cold dual-purpose grinding disc for a plastic granulator as claimed in any one of claims 1 to 3, characterized in that: The heating mechanism is an electric heating wire, an electric heating plate or an electric heating sheet.

5. A hot and cold dual-purpose grinding disc for a plastic granulator as claimed in claim 1, characterized in that: The upper surface of the grinding disc is provided with a plurality of regularly arranged protrusions or grooves.

6. A hot and cold dual-purpose grinding disc for a plastic granulator as claimed in claim 1, characterized in that: The air inlet pipe and the air outlet pipe are both made of high temperature resistant materials, and a layer of heat insulation material is provided on the outer surface of the pipe.

7. A hot and cold dual-purpose grinding disc for a plastic granulator as claimed in claim 3, characterized in that: The grinding disc has a cavity inside, and the temperature sensor is arranged in contact with the surface of the grinding disc.

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