Mould locking device for underwater granulator

Abstract

The utility model belongs to the technical field of granulator, and particularly relates to a mold locking device for an underwater granulator, which comprises a discharge pipe of an extruder, a fixed frame and a mold, a sliding seat is connected below the fixed frame in a sliding manner, a driver and a rotating seat are fixedly connected to the bottom of the sliding seat, and the rotating seat is fixedly connected to the bottom of the sliding seat. The lower part of the rotating seat is rotationally connected with a cylinder body; when the cutting blade is abraded, the special-shaped rod and the pressure sensor can generate a corresponding gap to reduce the pressure, and at the moment, the pressure sensor transmits a signal to control the electric push rod to extend and push the cutting blade to move to make up the gap, so that the cutter face position is automatically adjusted according to the abrasion degree, and the pelletizing effect is guaranteed; the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pelletizers, in particular to a mold locking device for an underwater pelletizer. Background Art

[0002] Plastic pelletizer is a pelletizer, which is mainly used for processing waste plastic film (industrial packaging film, agricultural mulch film, greenhouse film, beer bags, handbags, etc.), woven bags, agricultural convenience bags, basins, barrels, beverage bottles, furniture, daily necessities, etc. It is suitable for most common waste plastics and is the most widely used, most widely used and most popular plastic recycling processing machine in the waste plastic recycling industry.

[0003] With the rapid development of the plastics industry and the country's strict requirements on environmental protection, there are many ways to pelletize plastics, mainly water strand pelletizing, water ring cutting, sealed cold pelletizing and underwater pelletizing. Most of the pelletizers on the market use water strand gantry pelletizers. Although this pelletizing method can roughly meet the pelletizing requirements, it fails to break through the traditional structural design, resulting in a large size and large space occupation, causing a waste of space resources. In addition, the use of strand pelletizers consumes a lot of labor, making the overall cost too high. In addition, a large plastic odor is generated during the production process, which has a certain impact on the production environment. Water ring cutting and air cooling cutting can relatively save more space and labor, but they also have certain limitations.

[0004] When the plastic pelletizer is in use, the blade needs to fit in with the mold surface. The mold surface is provided with a mold hole for extruding the material. Rotating the knife shaft drives the blade to rotate to cut the material extruded from the mold surface. However, after using it for a period of time, the blade will wear out due to its contact with the mold surface, resulting in a decrease in the fit between the blade and the mold surface, and the blade's cutting effect on the material will also be reduced.

[0005] Existing Chinese patent publication number CN209775229U discloses an eccentric water mist pelletizer, comprising a frame and a cutter shaft rotatably mounted on the frame. A cutter holder is provided at the end of the cutter shaft, and a plurality of cutters are arranged in an array around the circumference of the cutter shaft on the cutter holder. A drive shaft is rotatably connected to the frame, and the cutter shaft is sleeved and keyed to the drive shaft. A drive device is provided on the frame to drive the cutter shaft to slide along the axis of the drive shaft and position the cutter shaft. When the blades are not in close contact with the die surface, i.e., when the cutter blades are worn, the drive device drives the cutter shaft to slide toward the drive shaft. Since the cutter holder is fixed to the end of the cutter shaft, the cutter on the cutter holder can also slide toward the die surface, thereby maintaining a close contact between the cutter and the die surface. This not only shortens the cutter replacement time and reduces costs, but also ensures the quality of the pelletizer product.

[0006] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the mold is usually installed on the extruder, and the mold needs to be cleaned after use, but the device lacks a means to quickly disassemble and assemble the mold, which is inconvenient to use and needs to be improved; therefore, in order to solve the above problems, a locking device for an underwater pelletizer is proposed. Utility Model Content

[0007] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the utility model proposes a mold locking device for an underwater pelletizer.

[0008] The technical solution adopted by the utility model to solve its technical problems is: the utility model is a locking device for an underwater pelletizer, comprising a discharge pipe of an extruder, a fixed frame and a mold, a sliding seat is slidably connected to the bottom of the fixed frame, a driver and a rotating seat are fixedly connected to the bottom of the sliding seat, a cylinder is rotatably connected to the bottom of the rotating seat, the cylinder is connected to the driver through a belt, a pelletizing adjustment component is installed on the cylinder and the fixed frame, the pelletizing adjustment component comprises a special-shaped rod and an electric push rod, the special-shaped rod is slidably installed inside the cylinder, the end of the special-shaped rod located outside the cylinder is fixedly connected to a cutting blade, the interior of the special-shaped rod is fixedly connected to a pressure sensor, the pressure sensor is electrically connected to the electric push rod, the electric push rod The dynamic push rod is fixedly installed on the lower side wall of the fixed frame, and the driving end of the electric push rod is fixedly connected to the sliding seat. When in use, the material is extruded from the discharge pipe of the extruder through the mold, and the moving electric push rod pushes the sliding seat to slide, so that the cutting blade cooperates with the discharge pipe to press against the mold, and the mold is fixed at the pipe mouth of the discharge pipe. At the same time, the special-shaped rod presses against the pressure sensor to generate pressure. The driver drives the barrel and the special-shaped rod to rotate through the belt, so that the cutting blade presses against the rotation to perform pelletizing. When the cutting blade wears, a corresponding gap will be generated between the special-shaped rod and the pressure sensor, resulting in a decrease in pressure. At this time, the pressure sensor transmits a signal to control the electric push rod to extend, pushing the cutting blade to move to make up for the gap, thereby realizing automatic adjustment of the blade position according to the degree of wear, ensuring the pelletizing effect and improving product quality.

[0009] Preferably, a sealing ring is fixedly connected to the mouth of the cylinder to prevent water from entering the cylinder.

[0010] Preferably, several brackets are installed above the fixed frame, and a lifter is fixedly connected to the bottom of the bracket, and the driving end of the lifter is fixedly connected to the fixed frame. The height of the pelletizing adjustment component can be adjusted to be staggered with the discharge pipe through the lifter, which is convenient for maintenance and replacement of the cutting blade, and the driver is hoisted on the water surface through the bracket, so that the driver does not need to use a waterproof motor, and an ordinary motor can be used to achieve underwater pelletizing effect, which greatly reduces the cost.

[0011] Preferably, the mold is located between the discharge pipe and the cutting blade.

[0012] Preferably, a locking mold assembly is installed on the discharge pipe, the mold and the special-shaped rod, and the locking mold assembly includes a connecting groove, which is opened at one end of the special-shaped rod, and a connecting column is inserted into the interior of the connecting groove, and one end of the connecting column is fixedly connected to the mold. By inserting the connecting column into the interior of the connecting groove, the mold and the special-shaped rod are plugged in, and the connecting column is adsorbed by the magnetic ring, the mold can be effectively prevented from falling off. During pelletizing, the electric push rod extends and synchronously drives the mold to press against the discharge pipe for use. After the pelletizing is completed, the electric push rod drives the mold to fall off the discharge pipe, which can be quickly pulled out for cleaning, which is convenient to use.

[0013] Preferably, the connecting column is made of ferromagnetic material, and a magnetic ring is embedded and connected inside the connecting groove.

[0014] Preferably, the mold locking assembly also includes a counterweight block, which is fixedly installed at the bottom of the mold. The side wall of the counterweight block is fixedly connected with a positioning pin. The gravity of the counterweight block ensures that the positioning pin is always kept directly below the mold. When the mold is against the discharge pipe, the positioning pin is automatically inserted into the inside of the positioning hole plate for fixation, preventing the mold from rotating to achieve automatic mold locking.

[0015] Preferably, the mold locking assembly further comprises a positioning hole plate, and the positioning hole plate is fixedly installed at the bottom of the discharge pipe.

[0016] The utility model is beneficial in that:

[0017] 1. When the cutting blade is worn, the utility model creates a corresponding gap between the special-shaped rod and the pressure sensor, resulting in a decrease in pressure. At this time, the pressure sensor transmits a signal to control the electric push rod to extend, pushing the cutting blade to move to fill the gap, thereby realizing automatic adjustment of the blade position according to the degree of wear, thereby ensuring the pelletizing effect and improving product quality.

[0018] 2. The utility model inserts the connecting column into the connecting groove, connects the mold and the special-shaped rod, and absorbs the connecting column through the magnetic ring, which can effectively prevent the mold from falling off. After the pelletizing is completed, the electric push rod drives the mold to fall off the discharge pipe, which can be quickly pulled out for cleaning, making it easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 For this utility model Figure 1 Side view;

[0022] Figure 3 This is a cross-sectional view of the cylinder of the utility model;

[0023] Figure 4 This is a cross-sectional view of the special-shaped rod of the utility model;

[0024] Figure 5 For this utility model Figure 4 Schematic diagram of the A structure.

[0025] In the figure: 1. discharge pipe; 2. fixed frame; 3. sliding seat; 4. drive; 5. rotating seat; 6. cylinder; 7. pelletizing adjustment assembly; 71. special-shaped rod; 72. cutting blade; 73. pressure sensor; 74. electric push rod; 75. sealing ring; 8. mold; 9. bracket; 10. lifter; 11. clamping assembly; 111. connecting groove; 112. connecting column; 113. magnetic ring; 114. counterweight block; 115. positioning pin; 116. positioning hole plate. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1: Please refer to Figure 1-3As shown, a locking device for an underwater pelletizer includes a discharge pipe 1 of an extruder, a fixed frame 2 and a mold 8. A sliding seat 3 is slidably connected to the bottom of the fixed frame 2, and a driver 4 and a rotating seat 5 are fixedly connected to the bottom of the sliding seat 3. A cylinder 6 is rotatably connected to the bottom of the rotating seat 5. The cylinder 6 is connected to the driver 4 through a belt. A pelletizing adjustment component 7 is installed on the cylinder 6 and the fixed frame 2. The pelletizing adjustment component 7 includes a special-shaped rod 71 and an electric push rod 74. The special-shaped rod 71 is slidably installed inside the cylinder 6. One end of the special-shaped rod 71 located outside the cylinder 6 is fixedly connected to a cutting blade 72. A pressure sensor 73 is fixedly connected to the inside of the special-shaped rod 71. The pressure sensor 73 is electrically connected to the electric push rod 74. The electric push rod 74 is fixedly installed on the lower side wall of the fixed frame 2, and the electric push rod 74 is fixedly installed on the lower side wall of the fixed frame 2. The driving end of 4 is fixedly connected to the sliding seat 3. When in use, the material is extruded from the discharge pipe 1 of the extruder through the mold 8, and the moving electric push rod 74 pushes the sliding seat 3 to slide, so that the cutting blade 72 cooperates with the discharge pipe 1 to press against the mold 8, and the mold 8 is fixed at the pipe mouth of the discharge pipe 1. At the same time, the special-shaped rod 71 presses against the pressure sensor 73 to generate pressure. The driver 4 drives the barrel 6 and the special-shaped rod 71 to rotate through the belt, so that the cutting blade 72 presses against the rotation to perform pelletizing. When the cutting blade 72 wears, a corresponding gap will be generated between the special-shaped rod 71 and the pressure sensor 73, resulting in a decrease in pressure. At this time, the pressure sensor 73 transmits a signal to control the electric push rod 74 to extend, pushing the cutting blade 72 to move to make up for the gap, thereby realizing automatic adjustment of the blade position according to the degree of wear, ensuring the pelletizing effect and improving product quality.

[0028] A sealing ring 75 is fixedly connected to the mouth of the cylinder 6 to prevent water from entering the cylinder 6.

[0029] Several brackets 9 are installed above the fixed frame 2, and a lifter 10 is fixedly connected to the bottom of the bracket 9, and the driving end of the lifter 10 is fixedly connected to the fixed frame 2. The lifter 10 can be used to adjust the height of the pelletizing adjustment component 7 and stagger it with the discharge pipe 1, which is convenient for maintenance and replacement of the cutting blade 72. The driver 4 is hoisted on the water surface through the bracket 9, so that the driver 4 does not need to use a waterproof motor, and an ordinary motor can be used to achieve underwater pelletizing effect, which greatly reduces the cost.

[0030] The die 8 is located between the discharge pipe 1 and the cutting blade 72 .

[0031] Example 2: For comparison with Example 1, please refer to Figure 4-5As shown, the utility model provides another embodiment, a locking assembly 11 is installed on the discharge pipe 1, the mold 8 and the special-shaped rod 71, and the locking assembly 11 includes a connecting groove 111, the connecting groove 111 is opened at one end of the special-shaped rod 71, and a connecting column 112 is inserted into the interior of the connecting groove 111, and one end of the connecting column 112 is fixedly connected to the mold 8. By inserting the connecting column 112 into the interior of the connecting groove 111, the mold 8 is plugged into the special-shaped rod 71, and the connecting column 112 is adsorbed by the magnetic ring 113, the mold 8 can be effectively prevented from falling off. During pelletizing, the electric push rod 74 extends and synchronously drives the mold 8 to press against the discharge pipe 1 for use. After the pelletizing is completed, the electric push rod 74 drives the mold 8 to fall off the discharge pipe 1, which can be quickly pulled out for cleaning, which is convenient to use.

[0032] The connecting post 112 is made of ferromagnetic material, and a magnetic ring 113 is embedded in the connecting groove 111 .

[0033] The mold locking assembly 11 also includes a counterweight block 114, which is fixedly installed at the bottom of the mold 8. The side wall of the counterweight block 114 is fixedly connected with a positioning pin 115. Through the gravity of the counterweight block 114, the positioning pin 115 is always kept directly below the mold 8. When the mold 8 is against the discharge pipe 1, the positioning pin 115 is automatically inserted into the inside of the positioning hole plate 116 for fixation, preventing the mold 8 from rotating to achieve automatic mold locking.

[0034] The mold locking assembly 11 further includes a positioning orifice plate 116 , which is fixedly mounted on the bottom of the discharge pipe 1 .

[0035] Through the use of wires by those skilled in the art, all electrical components in this case are connected to their corresponding power supplies, and appropriate controllers should be selected to electrically connect to the driver 4, electric push rod 74 and hydraulic rod according to actual conditions to meet control requirements. For specific connections and control sequences, reference should be made to the following working principle, in which the electrical connections between the electrical components are completed in the order in which they work. The detailed connection methods are well-known technologies in this art. The following mainly introduces the working principles and processes, and does not explain the electrical control.

[0036] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. For example, the extruder belongs to the existing conventional technology and will not be described in detail again.

[0037] Working principle: by inserting the connecting column 112 into the connecting groove 111, plugging the mold 8 with the special-shaped rod 71, and adsorbing the connecting column 112 through the magnetic ring 113, the mold 8 can be effectively prevented from falling off. During pelletizing, the electric push rod 74 extends and synchronously drives the mold 8 to press against the discharge pipe 1 for use. Through the gravity of the counterweight block 114, the positioning pin 115 is always kept directly below the mold 8. The positioning pin 115 will automatically be inserted into the inside of the positioning hole plate 116 for fixation, preventing the mold 8 from rotating and realizing automatic mold locking. After the pelletizing is completed, the electric push rod 74 drives the mold 8 to fall off the discharge pipe 1, which can be quickly pulled out for cleaning and convenient use.

[0038] The material is extruded from the discharge pipe 1 of the extruder through the mold 8, and the moving electric push rod 74 pushes the sliding seat 3 to slide, so that the cutting blade 72 cooperates with the discharge pipe 1 to press against the mold 8, fixing the mold 8 at the pipe mouth of the discharge pipe 1. At the same time, the special-shaped rod 71 presses against the pressure sensor 73 to generate pressure, and the driver 4 drives the cylinder 6 and the special-shaped rod 71 to rotate through the belt, so that the cutting blade 72 presses against the rotation to perform pelletizing. When the cutting blade 72 wears, a corresponding gap will be generated between the special-shaped rod 71 and the pressure sensor 73, resulting in a decrease in pressure. At this time, the pressure sensor 73 transmits a signal to control the electric push rod 74 to extend, pushing the cutting blade 72 to move to fill the gap, thereby realizing automatic adjustment of the blade position according to the degree of wear, ensuring the pelletizing effect and improving product quality.

[0039] The height of the pelletizing adjustment assembly 7 can be adjusted to be offset from the discharge pipe 1 through the lifter 10, which facilitates the inspection and replacement of the cutting blade 72. The driver 4 is hoisted above the water surface through the bracket 9, so that the driver 4 does not need to use a waterproof motor. An ordinary motor can be used to achieve underwater pelletizing effects, which greatly reduces costs.

[0040] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A clamping device for an underwater pelletizer, comprising an extruder discharge pipe (1), a fixed frame (2) and a die (8), characterized in that: A sliding seat (3) is slidably connected to the bottom of the fixed frame (2), a driver (4) and a rotating seat (5) are fixedly connected to the bottom of the sliding seat (3), a cylinder (6) is rotatably connected to the bottom of the rotating seat (5), the cylinder (6) is transmission-connected to the driver (4) via a belt, a pelletizing adjustment assembly (7) is installed on the cylinder (6) and the fixed frame (2), the pelletizing adjustment assembly (7) comprises a special-shaped rod (71) and an electric push rod (74), the special-shaped rod (71) is slidably installed inside the cylinder (6), one end of the special-shaped rod (71) located outside the cylinder (6) is fixedly connected to a cutting blade (72), the inside of the special-shaped rod (71) is fixedly connected to a pressure sensor (73), the pressure sensor (73) is electrically connected to the electric push rod (74), the electric push rod (74) is fixedly installed on the lower side wall of the fixed frame (2), and the driving end of the electric push rod (74) is fixedly connected to the sliding seat (3).

2. The mold locking device for an underwater pelletizer according to claim 1, characterized in that: A sealing ring (75) is fixedly connected to the mouth of the cylinder (6).

3. The mold locking device for an underwater pelletizer according to claim 1, characterized in that: A plurality of brackets (9) are installed above the fixed frame (2), a lifter (10) is fixedly connected to the bottom of the bracket (9), and a driving end of the lifter (10) is fixedly connected to the fixed frame (2).

4. The mold locking device for an underwater pelletizer according to claim 1, characterized in that: The mold (8) is located between the discharge pipe (1) and the cutting blade (72).

5. The mold locking device for an underwater pelletizer according to claim 1, characterized in that: A clamping assembly (11) is installed on the discharge pipe (1), the mold (8) and the special-shaped rod (71). The clamping assembly (11) includes a connecting groove (111). The connecting groove (111) is opened at one end of the special-shaped rod (71). A connecting column (112) is inserted into the interior of the connecting groove (111), and one end of the connecting column (112) is fixedly connected to the mold (8).

6. The mold locking device for an underwater pelletizer according to claim 5, characterized in that: The connecting column (112) is made of ferromagnetic material, and a magnetic ring (113) is embedded and connected inside the connecting groove (111).

7. The mold locking device for an underwater pelletizer according to claim 5, characterized in that: The mold locking assembly (11) further comprises a counterweight (114), wherein the counterweight (114) is fixedly mounted on the bottom of the mold (8), and a positioning pin (115) is fixedly connected to the side wall of the counterweight (114).

8. The mold locking device for an underwater pelletizer according to claim 5, characterized in that: The mold locking assembly (11) further comprises a positioning hole plate (116), and the positioning hole plate (116) is fixedly mounted on the bottom of the discharge pipe (1).

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