Extrusion puffing equipment

Abstract

The utility model discloses extruding and puffing equipment, which belongs to the technical field of puffing equipment and comprises a screw rod, the screw rod is a variable-pitch screw rod, and the screw pitch of the screw rod is reduced along with the pushing direction of materials; the barrel sleeves the periphery of the screw rod; the exhaust chamber is arranged on one side of the cylinder body and is communicated with the cylinder body; the discharging die is connected with the cylinder body; and the die head is connected with the discharging die. The screw pitch is gradually reduced, so that the material volume can be gradually compressed, the shearing force and friction heat can be increased, bubble breakage can be promoted, gas can be fully released, the materials can be uniformly mixed, water evaporation can be accelerated, and the drying efficiency can be improved. The exhaust chamber is provided with a local low-pressure area, so that moisture wrapped in the materials is rapidly vaporized and discharged along with gas, and the dehydration efficiency of the wet slag materials is improved. By extending the die hole channel, the material is subjected to more uniform pressure gradient change before being stripped from the die, and is converted into conical scattering from linear injection under the action of the die head, so that the water vaporization is accelerated, and the synchronous completion of puffing and drying is realized.

Description

Technical Field

[0001] This utility model relates to an extrusion puffing device, belonging to the technical field of puffing equipment. Background Technology

[0002] An extruder is a food processing device primarily used to process various raw materials under high temperature and pressure, followed by a sudden decompression release. This causes the internal moisture of the material to evaporate rapidly, resulting in volume expansion and a loose, porous structure, thus achieving a crispy texture and diverse flavors. The extrusion process not only effectively removes moisture but also improves the material's flowability and absorbency, facilitating subsequent processing or use. However, wet residues contain high moisture content and exhibit strong adhesion or uneven particle size, making them prone to clumping and clogging when added to the extruder. While traditional extrusion equipment can remove moisture, it often takes a long time or consumes a lot of energy, resulting in slow drying speeds and low production efficiency for wet residues.

[0003] For example, Chinese patent document CN209609834U discloses an extruder for feed processing. It solves the blockage problem by incorporating vents and a venting chamber, allowing the air pressure inside the chamber to escape through the vents. This reduces the danger posed by high air pressure caused by blockages, making the extruder safer to use. However, because this extruder has only one screw, its production efficiency is low, making it unsuitable for large-scale production. Furthermore, the structure at the vent is relatively complex, increasing manufacturing costs. Additionally, it is impossible to add water, steam, or other liquids into the extruder cylinder. Utility Model Content

[0004] This utility model provides an extrusion puffing device to solve the problems of high moisture content in wet slag materials, which easily clump together during the puffing process, causing equipment blockage, making the puffing machine prone to explosion under high pressure, as well as the slow drying speed and low production efficiency of wet slag materials.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] This utility model provides an extrusion puffing device, comprising:

[0007] The screw is a variable pitch screw, wherein the screw pitch decreases with the direction of material feeding;

[0008] A cylindrical body is fitted around the outer periphery of the screw.

[0009] An exhaust chamber is installed on one side of the cylinder and communicates with the cylinder.

[0010] The discharge mold is connected to the cylinder body;

[0011] The die head is connected to the discharge die.

[0012] In one embodiment of this utility model, there are at least two screws, and the two screws are arranged in parallel.

[0013] In one embodiment of this invention, the cylinder is provided with a cavity and a feed inlet. The cavity can heat or cool the section of the cylinder.

[0014] In one embodiment of this invention, the exhaust chamber includes a cover plate. By setting a localized low-pressure area, the exhaust chamber allows the moisture trapped in the material to quickly vaporize and be discharged with the gas, thereby accelerating the dewatering efficiency of the wet slag material.

[0015] In one embodiment of this utility model, a gearbox and a drive mechanism are included. The drive mechanism is connected to the gearbox via a first connecting member, and the screw is connected to the gearbox via a second connecting member.

[0016] In one embodiment of this utility model, the gearbox, the drive mechanism, and the cylinder are mounted on the machine body.

[0017] In one embodiment of this utility model, a first support base and a second support base are included, and the cylinder is connected to the machine body through the first support base and the second support base. This provides certain support and reduces vibration and swaying of the cylinder during movement.

[0018] In one embodiment of this utility model, a protective plate is provided on the exterior of the machine body. The protective plate forms an integral frame with the machine body, which can improve the vibration resistance of the equipment, prevent structural deformation caused by long-term operation, provide a mounting base for external pipelines, sensors and other components, and ensure the precise positioning of each component.

[0019] In one embodiment of this utility model, the second connecting member is a combination structure of a spline connecting sleeve and a spline connecting sleeve back nut. The spline connecting sleeve can achieve axial and circumferential fixation, ensuring the stability and accuracy of power transmission, while the back nut can lock the spline connecting sleeve to prevent loosening or falling off, ensuring that the spline connecting sleeve remains stable during operation, thereby guaranteeing the reliability and safety of power transmission.

[0020] In one embodiment of this utility model, the first connector, the gearbox, and the cylinder are provided with protective covers. The protective covers on the outside of the cylinder can reduce heat loss from the equipment surface, maintain the stability of the internal temperature of the cylinder, reduce the energy consumption of the heating system, and prevent operators from accidentally contacting high-temperature components, thus avoiding the risk of burns. Adding protective covers to the gearbox and the first connector can prevent personnel injury during component operation, prevent external impurities from entering and damaging the equipment, protect vulnerable areas, and reduce the risk of accidental contact with precision components during routine inspections.

[0021] The beneficial effects of this utility model are as follows:

[0022] This utility model provides an extrusion puffing device, including a screw, a cylinder, an exhaust chamber, and a die. The screw is a variable-pitch screw, with the screw pitch decreasing as the material is pushed forward. This gradual reduction in pitch compresses the material volume, increases shear force and frictional heat, promotes bubble bursting, and allows for complete gas release. It also ensures uniform mixing, enhances material homogeneity, accelerates moisture evaporation, and improves drying efficiency. The exhaust chamber is located in the middle of the cylinder. By creating a localized low-pressure area, the moisture trapped in the material rapidly vaporizes and is discharged with the gas, accelerating the dehydration efficiency of the wet residue. The die is an extended die, extending the die orifice channel to allow the material to experience a more uniform pressure gradient before exiting the die. Under the action of the die, the material transitions from linear spraying to conical scattering, accelerating moisture vaporization and achieving simultaneous puffing and drying. Furthermore, this equipment improves product uniformity and consistency, reduces material resistance during extrusion, and increases extrusion speed and product quality. Attached Figure Description

[0023] Figure 1 A front view of the extrusion puffing equipment provided in an embodiment of this utility model.

[0024] Figure 2 This is a top view of the extrusion puffing equipment provided in an embodiment of the present utility model.

[0025] Figure 3 A front view of the exhaust chamber provided for an embodiment of this utility model.

[0026] Figure 4 The front view of the screw provided in the embodiment of this utility model.

[0027] Figure 5 The front view of the mold head provided in the embodiment of this utility model.

[0028] In the diagram: 1. Body; 2. Support leg; 3. Guard plate; 4. Base; 5. Drive mechanism; 6. First connecting piece; 7. Gearbox; 8. Second connecting piece; 9. Screw; 10. Cylinder; 101. First cylinder; 102. Second cylinder; 103. Third cylinder; 104. Fourth cylinder; 105. Fifth cylinder; 106. Sixth cylinder; 11. Third connecting piece; 12. Material inlet; 13. First support seat; 14. Exhaust chamber; 141. Cover plate; 15. End cover; 16. Second support seat; 17. Support plate; 18. Fourth connecting piece; 19. Discharge mold; 20. Mold head; 21. Protective cover; 22. Cavity. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] like Figures 1 to 5 As shown, this application embodiment provides an extrusion puffing device that can avoid the problem of wet slag material agglomerating during the puffing process, causing equipment blockage, ensuring equipment safety, and improving equipment production efficiency. The extrusion puffing device includes a body 1, with multiple support legs 2 fixedly connected to one side of the body 1. The support legs 2 are evenly distributed below the body 1 and support the entire extrusion puffing device. A protective plate 3 is installed on the outside of the body 1, forming an integral frame with the body 1. This enhances the device's vibration resistance, prevents structural deformation caused by long-term operation, and provides a mounting base for external pipelines, sensors, and other components, ensuring accurate positioning of each component. A base 4 is installed on the side of the body 1 away from the support legs 2. Multiple bases 4 are used to connect various structures of the extrusion puffing device to the body 1. A drive mechanism 5 is installed at one end of the body 1, connected to the body 1 via the bases 4. The drive mechanism 5 provides driving force to the entire extrusion puffing device. The drive mechanism 5 can be a drive motor, cylinder, electric cylinder, or other structure, and is not specifically limited thereto.

[0033] In some embodiments, a gearbox 7 is provided on one side of the drive mechanism 5. The gearbox 7 is fixed to the machine body 1 by a base 4. An input shaft and an output shaft are respectively provided on both sides of the gearbox 7. The input shaft of the gearbox 7 is connected to the drive rod mechanism 5 through a first connector 6, which can transmit the power output by the drive mechanism 5. A cylinder 10 is installed on the side of the gearbox 7 away from the drive mechanism 5. The cylinder 10 is connected to the gearbox 7 through a third connector 11. A screw 9 is provided inside the cylinder 10. The screw 9 is connected to the output shaft of the gearbox 7 through a second connector 8, which transmits the power output by the drive mechanism 5 to the screw 9, driving the screw 9 to rotate, thereby pushing the material forward. There are two screws 9, which are arranged in parallel. The screws 9 are variable pitch screws, and each screw 9 is divided into two segments by spacers. The pitch of each screw segment gradually decreases with the direction of material propulsion. By gradually reducing the screw pitch, the material volume can be gradually compressed, increasing shear force and frictional heat, promoting bubble bursting, and allowing for full gas release. This also ensures uniform mixing, enhances material homogeneity, accelerates moisture evaporation, and improves drying efficiency. Simultaneously, the pressure gradually increases, propelling the material through subsequent stages and ensuring stable material flow. The discharge end of screw 9 is fitted with an M45×3-LH nut via an external thread.

[0034] In some embodiments, six cylinders 10 are provided, namely a first cylinder 101, a second cylinder 102, a third cylinder 103, a fourth cylinder 104, a fifth cylinder 105, and a sixth cylinder 106. The six cylinders are arranged sequentially, with the first cylinder 101 being the cylinder closest to the gearbox 7. The first cylinder 101 is connected to the gearbox 7 via a third connector 11. A feed inlet 12 is provided on the side of the first cylinder 101 away from the machine body 1, and the feed inlet 12 is used to add material to the extrusion puffing equipment. A first support seat 13 is provided at the connection between the third cylinder 103 and the fourth cylinder 104, and the first support seat 13 is mounted on the machine body 1 via a base 4. A second support seat 16 is provided on one side of the sixth cylinder 106, and the second support seat 16 is fixedly mounted on the end of the machine body 1 away from the drive mechanism 5 via the base 4. The first support seat 13 and the second support seat 16 can provide support for the cylinder 10. The sixth cylinder 106 is provided with an end cap 15 at the end away from the drive mechanism 5. The end cap 15 is used to close the cylinder 10.

[0035] In some embodiments, the cylinder 10 is provided with an independent cavity 22 on the outside, which can be used to heat or cool the section of the cylinder 10. At the same time, each section of the cylinder 10 is also equipped with an injection hole and an injection device, through which water, steam or other liquids can be directly added into the cylinder 10.

[0036] In some embodiments, a pad is provided between the first support base 13 and the second support base 16 and the cylinder 10. By adjusting the thickness or position of the pad, the coaxiality of the cylinder 10 can be finely adjusted to ensure the installation accuracy of the equipment, improve the operational stability and performance of the equipment, and at the same time, provide certain support to reduce the vibration and shaking of the cylinder 10 during movement.

[0037] In some embodiments, a support plate 17 is fixed to the side of the second support base 16 away from the drive mechanism 5, and a discharge mold 19 is provided on the side of the end cap 15 away from the sixth cylinder 106. The discharge mold 19 is fixed to the support plate 17 by a fourth connector 18. A die head 20 is connected to the side of the discharge mold 19 away from the end cap 15. The die head 20 is an extended die head, which, by extending the die hole channel, allows the material to undergo a more uniform pressure gradient change before exiting the die, and under the action of the die head, changes from linear injection to conical scattering, accelerating moisture vaporization and achieving simultaneous expansion and drying. It can also improve the uniformity and consistency of the product, reduce the resistance of the material during the extrusion process, and improve the extrusion speed and product quality. In use, the discharge mold 19 is connected to the sixth cylinder 106 by four M40 double-ended bolts.

[0038] like Figure 3 As shown, in some embodiments, an exhaust chamber 14 is provided on the side of the fourth cylinder 104 away from the machine body 1. The exhaust chamber 14 includes a cover plate 141, and an air outlet is provided between the exhaust chamber 14 and the cylinder 104. The cover plate 141 is located at the end of the exhaust chamber 14 away from the fourth cylinder 104, and the cover plate 141 is in a closed state. The side away from the exhaust chamber 14 is connected to a vacuum pump. A pressure sensor is provided inside the fourth cylinder 104 to monitor the pressure inside the cylinder in real time. When the pressure value exceeds the set value, the vacuum pump will automatically extract the gas inside the cylinder to exhaust the gas, maintaining the air pressure balance inside the cylinder 10. At the same time, the exhaust chamber 14 sets a local low-pressure area to allow the moisture trapped in the material to quickly vaporize and be discharged with the gas, accelerating the dewatering efficiency of the wet slag material. The exhaust chamber 14 can be a gradually expanding structure, which can reduce the airflow speed, buffer the impact of the airflow, and avoid sudden pressure changes.

[0039] In some embodiments, a protective cover 21 is provided on the outside of the first connector 6, gearbox 7, and cylinder 10. The protective cover 21 on the outside of the cylinder 10 can reduce heat loss from the surface of the equipment, maintain the stability of the internal temperature of the cylinder 10, reduce the energy consumption of the heating system, and prevent operators from accidentally contacting high-temperature components, thus avoiding the risk of burns. Adding a protective cover 21 to the outside of the gearbox 7 and the first connector 6 can prevent personnel injury during component operation, prevent external impurities from entering and causing equipment damage, protect vulnerable areas, and reduce the risk of accidental contact with precision components during routine inspections.

[0040] Optionally, the first connecting member 6 is a coupling that connects the output shaft of the drive mechanism 5 to the input shaft of the gearbox 7, transmitting the power output by the drive mechanism 5. Specifically, in this embodiment, the coupling is an elastic pin coupling, which not only transmits power between the two shafts but also absorbs and buffers vibrations and impacts during equipment operation through the elastic deformation of the elastic pins, reducing the impact of noise and vibration on the equipment and the environment.

[0041] Optionally, the second connecting member 8 is a spline connecting sleeve and a spline connecting sleeve back nut. The output shaft of the gearbox 7 is connected to the screw 9 through the spline connecting sleeve and the spline connecting sleeve back nut. The spline connecting sleeve can achieve axial and circumferential fixation to ensure the stability and accuracy of power transmission, while the back nut can lock the spline connecting sleeve to prevent loosening or falling off, ensuring that the spline connecting sleeve remains stable during operation, thereby ensuring the reliability and safety of power transmission.

[0042] Optionally, the third connector 11 is cylindrical, and the two ends of the third connector 11 are connected by four cylindrical components. The inner hole of the end face near the first cylinder 101 is in the shape of an "8", and the inner hole of the end face near the gearbox 7 is circular.

[0043] Optionally, the fourth connector 18 is a structure such as a pin or screw, which enables the support plate 17 to be connected to the discharge mold 19. The size of the required pin or screw can be adapted according to the actual dimensions.

[0044] The working principle of this utility model is as follows: When using the equipment, the drive mechanism 5 is first started by the controller, which drives the gearbox 7 to rotate, thereby driving the two screws 9 to rotate. The material to be extruded and expanded enters the cylinder through the feed port 12 opened at the top of the first cylinder 101. The material is then initially compressed and driven into the closed second cylinder 102 and third cylinder 103 by the threads on the screws 9. After strong stirring, mixing, shearing and other actions, the material is gradually matured. When the material enters the fourth cylinder 104, the moisture trapped in the material is quickly vaporized through the exhaust chamber 14 and discharged with the gas, which accelerates the dehydration efficiency of the wet slag material and adjusts the pressure and material density inside the cylinder 10. The material passing through the fourth cylinder 104 enters the final maturation section, where it is further matured under increased temperature and pressure and forms an amorphous texture. Finally, the material is discharged in a cone shape through the die head 20, and the material is dried at the time of discharge.

[0045] This document uses specific embodiments to illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An extrusion puffing apparatus, characterized by, The screw rod (9) is a variable pitch screw rod, and the pitch of the screw rod (9) decreases along the material advancing direction. The barrel (10) is sleeved on the outer periphery of the screw rod (9). An exhaust chamber (14) is installed on one side of the barrel (10) and communicates with the barrel (10). A discharge die (19) is connected with the barrel (10). A die head (20) is connected with the discharge die (19). The screw rod (9) is at least two, and the two screw rods (9) are arranged in parallel.

2. An extrusion cooking apparatus according to claim 1, wherein The barrel (10) is provided with a cavity (22) and a material port (12).

3. An extrusion cooking apparatus according to claim 1, wherein The exhaust chamber (14) comprises a cover plate (141).

4. An extrusion cooking apparatus according to claim 1, wherein The gear box (7) and the driving mechanism (5) are connected through the first connecting piece (6), and the screw rod (9) is connected with the gear box (7) through the second connecting piece (8).

5. An extrusion cooking apparatus according to claim 2, wherein The gear box (7), the driving mechanism (5) and the barrel (10) are installed on the machine body (1).

6. An extrusion cooking apparatus according to claim 5, wherein The barrel (10) is connected with the machine body (1) through the first support seat (13) and the second support seat (16).

7. An extrusion cooking apparatus according to claim 6, wherein The outer part of the machine body (1) is provided with a guard plate (3).

8. An extrusion cooking apparatus according to claim 7, wherein The second connecting piece (8) is a combination structure of a spline connecting sleeve and a spline connecting sleeve back mother.

9. An extrusion cooking apparatus according to claim 5, wherein The outer part of the first connecting piece (6), the gear box (7) and the barrel (10) is provided with a guard cover (21).

10. An extrusion cooking apparatus according to claim 5, wherein ​

Images