Flame-retardant material granulator

Abstract

The utility model relates to a flame-retardant material granulator. The cutting device comprises a machine base, a feeding module and a cutting module. A mounting frame and a guide frame are fixed to the machine base, the cutting module comprises a crank connecting rod mechanism, a sliding block, a lifting plate, an upper guide part, a lower guide part and a blade, the crank connecting rod mechanism is in transmission connection with the sliding block, a first step face, a first inclined face and a second step face are arranged on the upper side of the sliding block, and a third step face, a second inclined face and a fourth step face are arranged on the lower side of the sliding block. The upper side and the lower side of the opening are provided with a horizontal upper cutting edge and a horizontal lower cutting edge respectively. When the crank connecting rod runs for a circle, the upper cutting edge and the lower cutting edge can cut output materials twice; when the length of cut materials requires low reciprocating motion frequency of the sliding block, the moving speed of the sliding block is low, and in order to guarantee the cutting speed of the blade, the cutting speed can be increased by increasing the slope of the inclined plane.

Description

Technical Field

[0001] This utility model relates to a granulator, and more particularly to a flame-retardant material granulator. Background Technology

[0002] Flame-retardant PP material is a type of plastic material modified by adding flame retardants (such as phosphorus and nitrogen compounds) to polypropylene. It has excellent flame retardancy (such as UL94 V0 standard), mechanical properties and thermal stability. It is mainly used in electronic and electrical appliance housings and components, automotive interior parts, building insulation materials and components, household products (such as furniture frames and kitchen appliances) and fireproof packaging to meet fire safety requirements.

[0003] Existing plastic granulators have poor granulation efficiency when producing flame-retardant PP materials, and require constant manual monitoring of the collection tank to ensure it is full. When staff need to attend to other matters, the granules in the collection tank may overflow. To address this, a plastic granulator for producing flame-retardant PP materials (CN220561936U) has been disclosed. Its technical solution includes: a lifting plate, with first through holes at each of the four corners of the lifting plate's surface. A column is installed within each of the first through holes, and a top plate and a base are respectively installed at the top and bottom of the column. The lower surface of the lifting plate is connected to a first mounting plate via a first connecting plate. A reduction motor is installed on one side of the upper surface of the lifting plate, and the output shaft of the reduction motor passes through the surface of the lifting plate and is connected to a first rotating shaft via a coupling. A first bevel gear is installed at the other end of the first rotating shaft, and the first bevel gear meshes with a second bevel gear. This solution not only allows for the continuous pelletizing of multiple conveyor strips of flame-retardant PP material simultaneously, improving pelletizing efficiency, but also facilitates the collection of pellets, making it highly practical.

[0004] However, the cutter in this solution uses a cam mechanism to drive its up-and-down movement. This presents a problem because the length of the material particles is controlled by the cutting frequency and the feeding speed. The feeding speed is relatively difficult to change, as it is determined by the extrusion speed of the extruder, which is generally not very fast. Therefore, conventional solutions control particle length by adjusting the cutting frequency; the lower the cutting frequency, the longer the material particles. However, the cutting frequency affects the cutting speed of the cutter. If the cutting speed is too slow, the cross-section of the material particles will be uneven, affecting the quality of the particles. Furthermore, in this solution, the cutter can only perform one cut per revolution of the cam, resulting in relatively low efficiency. Summary of the Invention

[0005] This invention provides a flame-retardant material granulator; solving the problem in the prior art where a decrease in cutting frequency leads to a simultaneous decrease in the cutting speed of the cutter.

[0006] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a flame-retardant material granulator, including a base, a feeding module and a cutting module, wherein the feeding module consists of two feeding rollers close to each other and a guide block fixed on the base, the feeding rollers are horizontally rotatably mounted on the base, the guide block is provided with a plurality of parallel and spaced guide holes that penetrate the front and rear sides of the guide block, and the rear side of the guide block is a vertical surface; a mounting frame and a vertically guiding guide frame are fixed on the base, and the cutting module includes a crank-connecting rod mechanism mounted on the mounting frame, a slider horizontally slidably mounted on the mounting frame, and a slider slidably mounted on the guide frame. The device comprises a lifting plate, an upper guide fixed to the lifting plate, a lower guide fixed to the lifting plate, and a blade fixed to the bottom of the lifting plate. The crank-connecting rod mechanism is connected to the slider, allowing it to slide horizontally back and forth on the mounting frame. The upper side of the slider has a first stepped surface, a first inclined surface, and a second stepped surface, while the lower side of the slider has a third stepped surface, a second inclined surface, and a fourth stepped surface. The upper guide can fit against the upper side of the slider, and the lower guide can fit against the lower side of the slider. The blade has an opening, and the upper and lower sides of the opening are respectively provided with a horizontal upper cutting edge and a lower cutting edge. The blade fits against the rear side of the guide block.

[0007] This utility model feeding module is used to pull the strip material that has just cooled after being extruded from the extruder, allowing the material to be input from the front side of the guide hole and output from the rear end. The rear end face of the guide block is in contact with the blade. During the reciprocating movement of the blade, the upper and lower cutting edges on it can cut the output material. One reciprocating motion can perform two cuts. The specific principle of the blade's movement is as follows: the crank-connecting rod mechanism drives the slider on the mounting frame to reciprocate laterally at a stable frequency. The first and second step surfaces on the upper side of the slider are two surfaces with different heights, connected by a first inclined plane. Similarly, the third and fourth step surfaces on the lower side of the slider are two surfaces with different heights, connected by a second inclined plane. When the slider slides to the right, the second inclined plane guides the lower guide, causing the lifting plate to move downwards. When the slider slides to the left, the first inclined plane guides the upper guide, causing the lifting plate to move upwards. When the upper and lower guides are within any step surface range, the sliding of the slider does not cause the lifting plate to rise or fall. The slope of the inclined plane and the moving speed of the slider affect the up-and-down movement speed of the lifting plate. Therefore, when the length of the material to be cut requires a low reciprocating frequency of the slider, the moving speed of the slider is also low. To ensure the cutting speed of the blade, the cutting speed can be increased by increasing the slope of the inclined plane.

[0008] Furthermore, a tilting frame is rotatably connected to the base, and the upper feed roller is rotatably connected to the tilting frame and is a non-powered roller; the lower feed roller is a driven roller. In this invention, the upper feed roller presses against the plastic strip under its own weight, and this structure can accommodate materials of various sizes.

[0009] Furthermore, the machine base is also equipped with a receiving pipe, which is located behind the blade and directly opposite the guide hole. The receiving pipe is inclined downwards. The main function of the receiving pipe is to collect the cut particles and guide them to a fixed area, because the cut particles will fall randomly, and without the protection of the receiving pipe, the particles will fly everywhere.

[0010] Therefore, this utility model has the following characteristics compared with the prior art: 1. In this utility model, the upper and lower blades can cut the output material twice in one revolution of the crank connecting rod; 2. When the length of the material to be cut by this utility model requires a low reciprocating frequency of the slider, the slider's movement speed is also low. In order to ensure the cutting speed of the blade, the cutting speed can be increased by increasing the slope of the inclined plane. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Appendix Figure 2 This is a top view of the feeding module and part of the cutting module;

[0013] Appendix Figure 3 This is a structural diagram of the crank-connecting rod mechanism, slider, and lifting plate;

[0014] Appendix Figure 4 It is a diagram showing the various positional states of the slider and the two guide members;

[0015] Appendix Figure 5 This is a structural diagram of the crank-connecting rod mechanism, slider, and mounting bracket;

[0016] Appendix Figure 6 This is a structural diagram of the lifting plate, blades, and guide frame. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Example 1: See Figure 1 and Figure 3 A flame-retardant material granulator includes a base 100, a feeding module 200, and a cutting module 300. The feeding module consists of two feed rollers 210 close to each other and a guide block 220 fixed on the base. The feed rollers are horizontally rotatable on the base. The guide block has several parallel and spaced guide holes 221 that penetrate the front and rear sides of the guide block. The front opening of the guide holes is flared, and the rear side of the guide block is a vertical surface. A mounting frame 110 and a vertically guiding guide frame 120 are fixed on the base. The cutting module includes a crank-connecting rod mechanism 310 mounted on the mounting frame, a slider 320 horizontally slidably mounted on the mounting frame, a lifting plate 330 slidably mounted on the guide frame, two upper guide members 331 fixed on the lifting plate, two lower guide members 332 fixed on the lifting plate, and a blade 340 fixed to the bottom of the lifting plate. See also Figure 5 The slider has a long horizontal groove 321, within which two guide rods 111, fixedly connected to the mounting bracket, are slidably mounted. A crank-connecting rod mechanism is connected to the slider, allowing it to slide horizontally back and forth on the mounting bracket. The upper side of the slider has two first stepped surfaces 322, two first inclined surfaces 323, and two second stepped surfaces 324; the lower side of the slider has two third stepped surfaces 325, two second inclined surfaces 326, and two fourth stepped surfaces 327. The upper guide member can fit against the upper side of the slider, and the lower guide member can fit against the lower side of the slider. (See also...) Figure 6 The blade has an opening 341, and the upper and lower sides of the opening are respectively provided with a horizontal upper cutting edge 342 and a lower cutting edge 343. The blade is in contact with the rear side of the guide block.

[0020] In this embodiment, the feeding module is used to guide the freshly cooled strip material extruded from the extruder, allowing the material to enter from the front of the guide hole and exit from the rear. The rear end face of the guide block is in contact with the blade. During the reciprocating movement of the blade, its upper and lower cutting edges can cut the output material. One reciprocating motion can perform two cuts. See also Figure 4The specific principle of the blade movement is as follows: the crank-connecting rod mechanism can drive the slider on the mounting frame to reciprocate laterally at a stable frequency. The first and second step surfaces on the upper side of the slider are two surfaces with different heights, connected by a first inclined plane. Similarly, the third and fourth step surfaces on the lower side of the slider are two surfaces with different heights, connected by a second inclined plane. When the slider slides to the right, the second inclined plane guides the lower guide, causing the lifting plate to move downward. When the slider slides to the left, the first inclined plane guides the upper guide, causing the lifting plate to move upward. When the upper and lower guides are within any step surface range, the sliding of the slider will not cause the lifting plate to rise or fall. The slope of the inclined plane and the moving speed of the slider affect the up-and-down movement speed of the lifting plate. Therefore, when the length of the material to be cut in this embodiment requires a low reciprocating frequency of the slider, the moving speed of the slider is also low. In order to ensure the cutting speed of the blade, the cutting speed can be increased by increasing the slope of the inclined plane.

[0021] See Figure 1 and Figure 2 A tilting frame 130 is rotatably connected to the base. The upper feed roller is rotatably connected to the tilting frame and is a non-powered roller; the lower feed roller is a driven roller. In this embodiment, the upper feed roller presses against the plastic strip under its own weight. This structure can accommodate materials of various sizes. A rubber sleeve 211 is fitted on the feed roller to increase the friction between it and the material.

[0022] See Figure 1 The machine base is also equipped with a receiving pipe 140, which is located behind the blade and directly opposite the guide hole. The receiving pipe is inclined downwards. The main function of the receiving pipe is to collect the cut particles and guide them to a fixed area. Because the cut particles will fall randomly, without the protection of the receiving pipe, the particles will fly everywhere.

[0023] See Figure 6 Bearings / rollers 10 are rotatably mounted on both the upper and lower guide members, so that they are in rolling contact with the slider.

[0024] See Figure 5 The crank-connecting rod mechanism consists of a geared motor fixed on a mounting bracket, a turntable 311 directly connected to the output shaft of the geared motor, and a connecting rod 312 eccentrically rotatably connected to the turntable. The other end of the connecting rod is rotatably connected to one end of the slider. The axis of the turntable is close to or the same as the height of the slider.

[0025] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.

Claims

1. A fire-retardant material pelletizer comprising a base, a feed module, and a cut module, characterized in that: The feeding module consists of two feed rollers close to each other and a guide block fixed to the machine base. The feed rollers are horizontally rotatable on the machine base. The guide block has several parallel, spaced-apart guide holes that penetrate the front and rear sides of the guide block. The rear side of the guide block is a vertical surface. A mounting frame and a vertically guiding guide frame are fixed on the machine base. The cutting module includes a crank-connecting rod mechanism mounted on the mounting frame, a slider horizontally slidable on the mounting frame, a lifting plate slidable on the guide frame, an upper guide member fixed to the lifting plate, and a guide member fixed to the lifting plate. The upper guide member and the blade fixed to the bottom of the lifting plate are connected to the slider via a crank-connecting rod mechanism, allowing it to slide horizontally back and forth on the mounting frame. The upper side of the slider is provided with a first stepped surface, a first inclined surface, and a second stepped surface, and the lower side of the slider is provided with a third stepped surface, a second inclined surface, and a fourth stepped surface. The upper guide member can fit against the upper side of the slider, and the lower guide member can fit against the lower side of the slider. The blade is provided with an opening, and the upper and lower sides of the opening are respectively provided with a horizontal upper cutting edge and a lower cutting edge. The blade fits against the rear side of the guide block.

2. The flame retardant material prilling machine of claim 1, wherein: A tilting frame is rotatably connected to the base. The upper feed roller is rotatably connected to the tilting frame and is a non-powered roller; the lower feed roller is an active roller.

3. The flame retardant material prilling machine of claim 2, wherein: The feed roller is fitted with a rubber sleeve.

4. The flame retardant material prilling machine of claim 1, wherein: The base is also provided with a receiving pipe, which is located behind the blade and directly opposite the guide hole. The receiving pipe is inclined downwards.

5. The flame retardant material prilling machine of claim 1, wherein: Both the upper guide and the lower guide are rotatably fitted with bearings / rollers, so that they are in rolling contact with the slider.

6. The flame retardant material prilling machine of claim 1, wherein: The crank-connecting rod mechanism consists of a geared motor fixed on the mounting bracket, a turntable directly connected to the output shaft of the geared motor, and a connecting rod eccentrically rotatably connected to the turntable. The other end of the connecting rod is rotatably connected to one end of the slider.

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