CN117962161A - Stone paper master batch forming mechanism and forming method thereof - Google Patents

Abstract

The invention provides a stone paper master batch forming mechanism and a forming method thereof. The cutting head comprises a coupler connected with an output shaft of the extrusion mechanism, a speed reducing mechanism is arranged in the coupler, a blade is assembled at the output end of the speed reducing mechanism, and the blade is attached to the inner wall of the inner interlayer to rotate. Compared with the extruder in the prior art, the production mode has the advantages of smooth granulation molding, high processing speed and high molding efficiency, the blade which is driven to rotate by outputting the specific rotation speed of the extrusion mechanism and the like can cut off the raw material which is extruded from the inside of the extrusion hole and has semi-fluidity, and the master batches with different specifications required by the production of the stone paper can be produced more efficiently by utilizing the advantages of the rotation speed and the blocking of the middle shaft piece after cutting off.

Description

A forming mechanism and forming method for stone paper masterbatch

Technical Field

The invention relates to the field of stone paper masterbatch production, and in particular to a stone paper masterbatch forming mechanism and a forming method thereof.

Background technique

Stone paper is a new type of material between paper and plastic. It can replace some traditional functional paper and professional paper, and can also replace most traditional plastic packaging. It has the characteristics of low cost and controllable degradation, which can save users a lot of costs and will not cause pollution. From the perspective of replacing some traditional paper, it can save a lot of forest resources for society and reduce secondary pollution generated in the papermaking process; from the perspective of replacing some traditional plastic packaging, the product can be degraded after use and will not cause secondary white pollution.

Stone paper is a composite material formed by completely dissolving a large amount of inorganic mineral powder into a small amount of non-toxic resin. In actual use, due to its waterproof, environmentally friendly and easy printing and processing characteristics, it will be used in other fields such as outer packaging and wall panels. Due to its different shaping requirements, and because the properties of stone paper composite materials are similar to those of plastics, the plastic masterbatch processing method can be used to process the powdered raw materials into masterbatches, which reduces dust, facilitates storage and shaping, and is convenient for configuration and shaping.

However, in the specific masterbatch processing process, due to its characteristics, its melting temperature is higher than the melting temperature of plastic, but the temperature difference of the stone paper material after mixing with mineral powder is lower than that of plastic. In summary, the fluidity of stone paper raw materials in the molten state is much lower than the fluidity of plastic masterbatch. Therefore, the lengthy cooling process of plastic masterbatch processing can be omitted, and the shaping can be achieved through a very short cooling process. Therefore, the existing granulator has low adaptability and low production efficiency.

Summary of the invention

The object of the present invention is to provide a stone paper masterbatch forming mechanism and a forming method thereof to solve the problems raised in the above background technology.

To achieve the above object, the present invention provides the following technical solutions: a stone paper masterbatch forming mechanism and a forming method thereof, comprising an extrusion mechanism, an output end of the extrusion mechanism is equipped with an extrusion head, and a cutting head is rotatably installed at the center of the extrusion head;

The extrusion head comprises a tubular structure with an outwardly expanding cone, an inner partition is welded to the inner wall of the tubular structure, a cavity is formed between the tubular structure and the inner partition, and the cavity is connected to the center of the extrusion mechanism;

Extrusion holes are evenly opened inside the inner partition layer;

The cutting head comprises a coupling connected to the output shaft of the extrusion mechanism, a speed reduction mechanism is arranged inside the coupling, and a blade is mounted on the output end of the speed reduction mechanism, and the blade rotates in contact with the inner wall of the inner partition.

Preferably, the extrusion mechanism comprises an extrusion tube, a feed tube is arranged at the top of the extrusion tube obliquely upward, a plug is welded at the top of the extrusion tube, an output shaft is rotatably assembled between the plug and the coupling at the bottom, and a spiral sheet is welded on the outside of the output shaft.

Preferably, the bottom end of the extrusion tube is provided with an inwardly recessed groove.

Preferably, a first connecting piece is welded to the outer wall of the bottom end of the extruded tube, and a second connecting piece is welded to the top end of the sleeve.

Preferably, the inner partition has an inverted bowl-shaped structure, and the coupling is assembled at the center of the inner partition.

Preferably, the pitch of the spiral sheet gradually decreases from top to bottom.

Preferably, the exterior of the extruded tube is equipped with a heating structure.

Preferably, a central axis is welded at the center of the blade.

Preferably, the exterior of the central axis is evenly provided with material receiving grooves which spiral upward.

A molding method based on a stone paper masterbatch molding mechanism, comprising the following methods:

Step 1: Masterbatch mixing: Mix and stir the different types of stone paper masterbatches to be produced. During stirring, use cooling equipment to cool the outer wall of the stirring tank to obtain a uniformly stirred powder;

Step 2: Heating and extruding, the powder is fed from the inside of the feeding tube through the funnel bin, the heating device on the outer wall of the extrusion tube heats the bottom forming part of the extrusion tube, and the external motor drives the output shaft to drive the spiral blade to extrude the powder to obtain the raw material in a molten state;

Step 3: Extrusion shaping, the raw material flows downward from the outer wall of the coupling and the extrusion tube, expands outward through the groove, flows into the inner wall of the inner partition, and is retained from the extrusion hole. After cooling measures, the strip-shaped raw material with the same cross-section as the extrusion hole is cut by the blade rotating in conjunction with the coupling. The masterbatch is finally cut quickly by the blade and splashes toward the center, falls into the inside of the receiving trough, and finally falls into the inside of the collecting bin.

Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a coupling that rotates coaxially with the output shaft, the output end of the reduction mechanism inside the coupling drives the blade to rotate, the blade rotates in contact with the inner wall of the inner partition, and cuts off the raw material cylinder output from the extrusion hole. Compared with the extruder in the prior art, the production method of the present invention has the advantages of smooth granulation molding, fast processing speed, and high molding efficiency. The blade driven to rotate by the output of the extrusion mechanism at a speed equal to that of the extrusion mechanism can cut off the semi-fluid raw material extruded from the inside of the extrusion hole, and after cutting, the advantage of the speed and the blocking of the middle shaft can be used to achieve more efficient production, which is conducive to the production of masterbatches of different specifications required for stone paper production, and effectively solves the problem of low production efficiency when the existing stone paper masterbatch is granulated by the existing equipment, and through the cutting method that rotates at a certain ratio with the extrusion shaft, the purpose of direct generation by one machine is adopted, thereby improving the production efficiency of the stone paper masterbatch and reducing the floor space occupied by the equipment.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the present invention;

FIG2 is a schematic diagram of the cutaway structure of the present invention;

FIG3 is a schematic diagram of a cutaway assembly of the present invention;

FIG4 is a schematic diagram of the cross-sectional structure of the extrusion head of the present invention;

FIG. 5 is a sectional front view of the present invention.

In the figure: 1. extrusion mechanism, 11. extrusion tube, 12. plug, 13. feed tube, 14. spiral sheet, 15. output shaft, 16. connecting piece 1, 17. groove, 2. extrusion head, 21. connecting piece 2, 22. sleeve, 23. inner partition, 24. extrusion hole, 3. cutting head, 31. coupling, 32. blade, 33. middle shaft, 34. receiving trough.

Detailed ways

The following will be combined with the 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 described embodiments 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 creative work are within the scope of protection of the present invention.

Please refer to Figures 1-5. The present invention provides a technical solution: a stone paper masterbatch forming mechanism and a forming method thereof, comprising an extrusion mechanism 1, an extrusion head 2 is mounted at the output end of the extrusion mechanism 1, and a cutting head 3 is rotatably mounted at the center of the extrusion head 2;

The extrusion head 2 comprises an outwardly expanding conical tubular structure, an inner partition 23 is welded to the inner wall of the tubular structure, a cavity is formed between the tubular structure and the inner partition 23, and the cavity is connected to the center of the extrusion mechanism 1;

The inner partition layer 23 is evenly provided with extrusion holes 24;

The cutting head 3 includes a coupling 31 connected to the output shaft of the extrusion mechanism 1 , a speed reduction mechanism is disposed inside the coupling 31 , and a blade 32 is mounted on the output end of the speed reduction mechanism. The blade 32 rotates in contact with the inner wall of the inner partition 23 .

The present invention provides a coupling 31 that rotates coaxially with the output shaft 15. The output end of the reduction mechanism inside the coupling 31 drives the blade 32 to rotate. The blade 32 rotates in contact with the inner wall of the inner partition 23 to cut off the raw material cylinder output from the extrusion hole 24. Compared with the extruder in the prior art, the production method of the present invention has the advantages of smooth granulation molding, fast processing speed and high molding efficiency. The blade 32 driven to rotate by the output of the extrusion mechanism at a speed equal to that of the extrusion mechanism can cut off the semi-fluid raw material extruded from the inside of the extrusion hole 24. After cutting, the advantage of the speed and the blocking of the middle shaft 33 can be used to achieve more efficient production, which is conducive to the production of masterbatches of different specifications required for stone paper production. The problem of low production efficiency when the existing stone paper masterbatch is granulated by the existing equipment is effectively solved. In addition, the cutting method that rotates at a certain ratio with the extrusion shaft is adopted to achieve the purpose of direct generation by one machine, thereby improving the production efficiency of the stone paper masterbatch and reducing the floor space occupied by the equipment.

Specifically, the extrusion mechanism 1 includes an extrusion tube 11, a feeding tube 13 is arranged at the top of the extrusion tube 11 obliquely upward, a plug 12 is welded to the top of the extrusion tube 11, an output shaft 15 is rotatably assembled between the plug 12 and the coupling 31 at the bottom, and a spiral sheet 14 is welded to the outside of the output shaft 15.

The extrusion mechanism 1 used in the present invention is an extrusion mechanism of a screw extruder as a whole, and the raw materials are heated and melted by compression extrusion assisted heating. In actual applications, other hot melting equipment can be used instead. Its main purpose is to characterize the raw materials into a solid structure after melting, which is convenient for transportation and storage, and avoids dust generation during storage and use.

Specifically, an inwardly recessed groove 17 is provided at the bottom end of the extrusion tube 11. The main purpose of the inner chamfered groove 17 is that a gap that meets the extrusion conditions needs to be reserved at the location where the inner partition 23 of the extrusion head 2 and the extrusion tube 11 are connected. Without the groove 17, the inclined gap between the inner partition 23 and the extrusion tube 11 is small, which is not conducive to the uniform speed passage of the raw material. Therefore, the groove 17 is provided to facilitate the passage of the raw material and avoid accumulation and blockage.

Specifically, a connecting piece 16 is welded to the outer wall of the bottom end of the extrusion tube 11, and a connecting piece 21 is welded to the top end of the sleeve 22. Connecting holes are provided on the outer sides of the connecting piece 16 and the connecting piece 21, and the connecting piece 17 and the connecting piece 21 can be assembled by bolts. The two connecting pieces are tightened by screwing with bolts, and the connection spacing is adjustable. A flexible pad is sleeved between the connecting piece 17 and the connecting piece 21, which is sleeved on the outside of the bolt and can serve as an intermediate buffer interlayer during connection, thereby stabilizing the connection effect of the bolt and facilitating positioning and the use of the bolt. In addition to the flexible pad, other structures that release stress outward, such as springs, can also be used.

During the production process, the bolts are mainly used as a tension structure to form a tension state structure between the sleeve 22 and the extrusion tube 11 to offset the internal extrusion pressure.

Specifically, the inner partition 23 is an inverted bowl-shaped structure, and the coupling 31 is assembled at the center of the inner partition 23. The inner partition 23 merges the outer wall of the inner partition 23 and the inner wall of the sleeve 22 into a flat cavity. The raw material in a molten state flows inside the cavity, and the thickness of the cavity needs to be uniform.

Specifically, the pitch of the spiral blade 14 gradually decreases from top to bottom, and the pitch of the spiral blade 14 changes in an orderly manner. Therefore, at the same rotation speed, the raw material will be compressed and transported forward at a uniform speed, thereby increasing the melting speed, and assisting the external heating structure to achieve the purpose of reducing energy consumption, making it easier to control the melting temperature;

During the production process, the internal pressure at the end of the extrusion tube 11 is measured in real time by a pressure sensor and a temperature sensor. The values reflected by the pressure and temperature sensors respectively know the state of internal extrusion to assist the start and stop of the external heating equipment, and can control the temperature more accurately to ensure that at the lowest melting temperature, the raw material flows in the extrusion tube 11 and into the cavity of the inner partition 23, which is beneficial to extrusion molding, and the temperature after extrusion molding is at the lowest temperature, which is conducive to cooling and shaping.

Specifically, the exterior of the extrusion tube 11 is equipped with a heating structure.

Specifically, a central shaft 33 is welded at the center of the blade 32 .

The central axis 33 is a cylindrical structure with a spiral groove, and the opening position of the spiral groove corresponds to the distribution position of the blade 32. After the blade 32 rotates to cut out the particles, the shear force of the blade 32 will carry the particles with a certain initial velocity and move toward the center along the tangential direction. The spiral groove with a reserved margin will block the particles from splashing toward the center position, and then the expected rotational action is converted into a straight line falling effect through the follow-up rotation of the spiral, thereby achieving the purpose of buffering, and preventing the falling of incompletely formed particles. It has a certain blocking effect, avoids the adhesion of particles, and improves production efficiency.

Specifically, the exterior of the central shaft 33 is evenly provided with material receiving grooves 34 that spiral upward.

A gear set is arranged inside the coupling 13, and the two ends of the gear set are respectively connected between the output shaft 15 and the connecting piece of the belt piece 32. The outside of the coupling 13 is a fixed cylindrical shell structure. When the output shaft 15 rotates, the rotation speed of the blade 32 relative to the output shaft 15 is increased by increasing the rotation speed according to the gear transmission ratio, so that during spiral extrusion, the blade 32 can cut the continuously output raw material at a suitable rotation speed.

The internal transmission ratio of the coupling 13 can be one group or multiple groups. When one group structure is adopted, the speed at which the extrusion hole 24 outputs the raw material is the same as the rotation speed of the blade 32, so that particles of one size can be output. When multiple groups are used, a structure with the same principle as the planetary gear transmission can be used. For example, the output speed can be adjusted by adjusting the extended sun gear as the central axis and adjusting the insertion depth of the central axis to different degrees, so as to achieve the purpose of adjusting the drilling speed of the blade 32 while keeping the rotation speed of the output shaft 15 unchanged.

A cooling device can be provided on the outer wall or inner wall at the bottom end of the extruder head 2 to shape the particles after cutting. Alternatively, the lower opening of the extruder head 2 can be directly connected to a collecting bin filled with coolant to quickly cool the particles using coolant such as water, thereby preventing particles from sticking together.

A molding method based on a stone paper masterbatch molding mechanism, comprising the following methods:

Step 1: Masterbatch mixing: Mix and stir the different types of stone paper masterbatches to be produced. During stirring, use cooling equipment to cool the outer wall of the stirring tank to obtain a uniformly stirred powder;

Step 2: heating and extrusion, the powder is fed from the inside of the feed pipe 13 through the funnel bin, the heating device on the outer wall of the extrusion tube 11 heats the bottom molding part of the extrusion tube 11, and the external motor drives the output shaft 15 to drive the spiral blade 14 to extrude the powder to obtain the raw material in a molten state;

Step 3: Extrusion shaping, the raw material is squeezed and flows downward from the outer wall of the coupling 31 and the extrusion tube 11, the raw material expands outward through the groove 17, flows into the inner wall of the inner partition 23, and the raw material is retained from the extrusion hole 24. After cooling measures, the strip raw material with the same cross-section as the extrusion hole 24 is cut by the blade 32 rotating in conjunction with the coupling 31. The masterbatch is finally cut quickly by the blade 32 and splashes toward the center, falls into the inside of the receiving trough 34, and finally falls into the inside of the collecting bin.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A stone paper masterbatch forming mechanism and a forming method thereof, comprising an extrusion mechanism (1), characterized in that: an extrusion head (2) is mounted at the output end of the extrusion mechanism (1), and a cutting head (3) is rotatably mounted at the center of the extrusion head (2); The extrusion head (2) comprises a tubular structure with an outwardly expanding cone, an inner partition (23) is welded to the inner wall of the tubular structure, a cavity is formed between the tubular structure and the inner partition (23), and the cavity is connected to the center of the extrusion mechanism (1); The inner partition layer (23) is evenly provided with extrusion holes (24); The cutting head (3) comprises a coupling (31) connected to the output shaft of the extrusion mechanism (1), a speed reduction mechanism is arranged inside the coupling (31), and a blade (32) is mounted on the output end of the speed reduction mechanism, and the blade (32) rotates in contact with the inner wall of the inner partition (23). 2. A stone paper masterbatch forming mechanism and forming method according to claim 1, characterized in that: the extrusion mechanism (1) comprises an extrusion tube (11), the top end of the extrusion tube (11) is provided with a feed tube (13) inclined upward, the top end of the extrusion tube (11) is welded with a plug (12), an output shaft (15) is rotatably assembled between the plug (12) and the coupling (31) at the bottom end, and the outside of the output shaft (15) is welded with a spiral sheet (14). 3. A stone paper masterbatch forming mechanism and forming method according to claim 1, characterized in that: the bottom end of the extrusion tube (11) is provided with an inwardly recessed groove (17). 4. A stone paper masterbatch forming mechanism and forming method according to claim 1, characterized in that: a connecting piece 1 (16) is welded to the outer wall of the bottom end of the extrusion tube (11), and a connecting piece 2 (21) is welded to the top end of the sleeve (22). 5. A stone paper masterbatch forming mechanism and forming method according to claim 1, characterized in that: the inner partition (23) is an inverted bowl-shaped structure, and the coupling (31) is assembled at the center of the inner partition (23). 6. A stone paper masterbatch forming mechanism and forming method according to claim 1, characterized in that the pitch of the spiral blade (14) gradually decreases from top to bottom. 7. A stone paper masterbatch forming mechanism and forming method according to claim 1, characterized in that: a heating structure is installed on the outside of the extrusion tube (11). 8. The stone paper masterbatch forming mechanism and forming method according to claim 1, characterized in that a central shaft (33) is welded at the center of the blade (32). 9. A stone paper masterbatch forming mechanism and forming method according to claim 8, characterized in that: the outer portion of the central shaft (33) is evenly provided with spiral upward material receiving grooves (34). 10. A molding method based on a stone paper masterbatch molding mechanism, comprising the following method: Step 1: Masterbatch mixing: Mix and stir the different types of stone paper masterbatches to be produced. During stirring, use cooling equipment to cool the outer wall of the stirring tank to obtain a uniformly stirred powder; Step 2: heating and extruding, the powder is fed into the feed pipe (13) through the hopper, the heating device on the outer wall of the extrusion pipe (11) heats the bottom molding part of the extrusion pipe (11), and the external motor drives the output shaft (15) to drive the spiral blade (14) to extrude the powder to obtain the raw material in a molten state; Step 3: Extrusion shaping, the raw material is squeezed and flows downward from the outer wall of the coupling (31) and the extrusion tube (11), the raw material expands outward through the groove (17), and flows into the inner wall of the inner partition (23), and the raw material is retained from the extrusion hole (24). After cooling measures, the strip-shaped raw material with the same cross-section as the extrusion hole (24) is cut by the blade (32) rotating in conjunction with the coupling (31) to form a raw material column, and the masterbatch is finally cut quickly by the blade (32) and splashes toward the center, falls into the inside of the receiving trough (34), and finally falls into the inside of the collecting bin.