Internal heating screw and machine barrel

Abstract

The invention discloses an internal heating screw which comprises a screw body, a positioner is fixedly installed at the end of an extrusion section, an electric heating wire used for heating the screw body is fixedly installed on the side of the positioner, and a temperature sensor used for detecting the temperature of the screw body is fixedly installed on the side of the positioner. The temperature sensor and the electric heating wire are arranged in the mounting hole; external heating of the machine barrel is changed into internal heating of the screw, compared with external heating, the preheating area is reduced, the screw is heated through the built-in electric heating wire, after the temperature of the screw is rapidly increased, extruded food raw materials are directly heated through the screw, the food raw materials can rapidly reach the puffing temperature, the heating puffing time is shortened, and the puffing efficiency is improved. All heat generated by internal heating can only be directly used for puffing temperature rise from inside to outside, energy loss is reduced, the response speed of internal heating temperature rise and temperature drop is high, constant-temperature puffing can be achieved by combining internal and external temperature control, and the stability of products is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of food production and processing equipment, and more specifically, particularly relates to an internally heated screw and barrel. Background Art

[0002] In the current puffed food production process, there are still many production equipment that require workers with certain experience to operate. The quality of the products produced by the puffing equipment is greatly affected by the puffing temperature of the equipment. At present, the market basically uses an external barrel heating device for heating. The heating wire needs to slowly heat up the outermost large area of ​​the barrel first, and then the heat is transferred from the barrel to the internal screw. Since the external heating wire heats up and transfers the heat to the screw through the thick barrel, and the temperature inside the barrel and the screw cannot be detected, the temperature during internal puffing fluctuates greatly. The temperature fluctuation will cause the puffing process to be unstable and affect the product quality. The heating wire needs to heat the outer wall of the barrel first, and then transfer the heat to the internal screw through heat conduction. The process is slow and the heat loss is large. The barrel is thick, which leads to a lag in heat transfer and it is difficult to respond to temperature changes quickly. Therefore, we need to propose an internal heating screw and barrel. Summary of the invention

[0003] The object of the present invention is to provide an internally heated screw and barrel. By changing the external heating of the barrel to the internal heating of the screw, the preheating area becomes smaller than that of external heating. The screw is heated by a built-in electric heating wire, so that after the screw is quickly heated, the extruded food raw materials are directly heated by the screw, so that the food raw materials can quickly reach the puffing temperature, shortening the time for heating and puffing. All the heat generated by the internal heating can only be directly used for puffing and heating from the inside to the outside, which reduces energy loss. The internal heating has a fast temperature rise and fall response speed. Combined with internal and external temperature control, constant temperature puffing can be achieved, ensuring the stability of the product, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: An internal heating screw, comprising a screw, the screw comprising a connecting section, an extrusion section, a molding section and a spiral sheet, the end of the extrusion section is fixedly connected to the end of the molding section, the end of the molding section is fixedly installed on the end of the connecting section, and the spiral sheet is fixedly connected to the surface of the molding section; The extrusion section and the forming section are provided with mounting holes, a positioner is fixedly installed at the end of the extrusion section, an electric heating wire for screw heating is fixedly installed on the side of the positioner, a temperature sensor for screw temperature detection is fixedly installed on the side of the positioner, and the temperature sensor and the electric heating wire are both arranged in the mounting hole.

[0005] Preferably, the forming section is arranged in a conical shape.

[0006] Preferably, the groove depth of the spiral sheet and the forming section gradually becomes shallower from right to left.

[0007] A barrel comprises an internal heating screw, a barrel body, and a heating cavity and a forming hole opened inside the barrel body, wherein the forming hole is connected with the heating cavity, and the screw is movably installed in the barrel body.

[0008] Preferably, the molding section is arranged in the heating chamber, and the extrusion section is arranged in the molding hole.

[0009] Preferably, the edge of the spiral sheet is in contact with the inner wall of the heating chamber.

[0010] Preferably, a feed discharge port is provided on the cylinder, and the feed discharge port is communicated with the heating chamber.

[0011] Technical effects and advantages of the present invention: Compared with the prior art, the internally heated screw and barrel provided by the present invention have the following advantages: The present invention changes the external heating of the barrel to the internal heating of the screw, and the preheating area is smaller than that of external heating. The screw is heated by a built-in electric heating wire, so that after the screw is quickly heated, the extruded food raw materials are directly heated by the screw, so that the food raw materials can quickly reach the puffing temperature, and the time for heating and puffing is shortened. All the heat generated by the internal heating can only be directly used for puffing and heating from the inside to the outside, which reduces the energy loss. The internal heating has a fast temperature rise and fall response speed. Combined with the internal and external temperature control, constant temperature puffing can be achieved, and the stability of the product is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the screw structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the screw of the present invention; Figure 3 It is a schematic diagram of the barrel and screw structure of the present invention; Figure 4 This is one of the cross-sectional structural diagrams of the cylinder of the present invention; Figure 5 This is the second schematic diagram of the cross-sectional structure of the cylinder of the present invention.

[0013] In the figure: 1. screw; 101. connecting section; 102. extrusion section; 103. forming section; 104. spiral sheet; 2. barrel; 3. positioner; 4. mounting hole; 5. heating chamber; 6. feed port; 7. forming hole; 8. temperature sensor; 9. electric heating wire. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] The present invention provides Figure 1-5 An internal heating screw shown includes a screw 1, wherein the screw 1 includes a connecting section 101, an extrusion section 102, a molding section 103 and a spiral sheet 104, wherein the end of the extrusion section 102 is fixedly connected to the end of the molding section 103, the end of the molding section 103 is fixedly mounted on the end of the connecting section 101, and the spiral sheet 104 is fixedly connected to the surface of the molding section 103; It should be noted that the main function of the screw 1 is to transport, compress, mature, homogenize and finally extrude the food raw materials through rotational motion.

[0016] The extrusion section 102 and the forming section 103 are provided with mounting holes 4, a positioner 3 is fixedly installed at the end of the extrusion section 102, an electric heating wire 9 for heating the screw 1 is fixedly installed on the side of the positioner 3, a temperature sensor 8 for detecting the temperature of the screw 1 is fixedly installed on the side of the positioner 3, and the temperature sensor 8 and the electric heating wire 9 are both arranged in the mounting hole 4.

[0017] It should be noted that, by building an electric heating wire 9 inside the screw 1, the electric heating wire 9 can directly heat the screw 1. The internal heating shortens the waiting time from cooling to reaching the puffing temperature during the start-up of the puffing equipment. The temperature sensor 8 built into the screw 1 is used to detect the temperature of the screw 1, thereby solving the problem that the puffing temperature inside the barrel 2 cannot be detected. Then, constant temperature puffing can be achieved by combining internal and external temperature control to ensure the stability of the product. At the same time, the space for an external heating device is completely saved, which greatly facilitates the disassembly, assembly and maintenance of the barrel 2 and avoids the risk of leakage caused by frequent damage to the external heating. The positioner 3 is used to fix the position of the temperature sensor 8 and the electric heating wire 9 in the mounting hole 4.

[0018] In an optional embodiment, the forming section 103 is arranged in a conical shape, and the groove depth between the spiral piece 104 and the forming section 103 gradually becomes shallower from right to left.

[0019] It should be noted that the depth of the spiral grooves of the spiral sheet 104 and the forming section 103 gradually becomes shallower, the food raw materials are compressed, the density is increased, and at the same time, it is ensured that the food raw materials can enter smoothly and move forward.

[0020] A barrel includes an internal heating screw, a barrel body 2, and a heating chamber 5 and a molding hole 7 opened inside the barrel body 2, the molding hole 7 is connected to the heating chamber 5, the screw 1 is movably installed in the barrel body 2, the molding section 103 is arranged in the heating chamber 5, and the extrusion section 102 is arranged in the molding hole 7.

[0021] It should be noted that the food raw materials can be transported, compressed and expanded at elevated temperature in the heating chamber 5 , and the food raw materials after elevated temperature and expansion can be formed into a desired shape when extruded through the forming hole 7 .

[0022] In an optional embodiment, the edge of the spiral sheet 104 is in contact with the inner wall of the heating chamber 5 .

[0023] In an optional embodiment, a feed opening 6 is provided on the barrel 2 , and the feed opening 6 is communicated with the heating chamber 5 .

[0024] It should be noted that the food raw materials can fall into the heating chamber 5 of the cylinder 2 through the feeding port 6 to be transported, compressed and expanded at elevated temperature.

[0025] During specific use, the food raw materials enter the heating chamber 5 through the feed port 6, and the screw 1 is driven by the driving mechanism to rotate the screw 1 in the barrel 2. The food raw materials are compressed by the spiral sheet 104, and the electric heating wire 9 is energized. The heat generated by the electric heating wire 9 is directly transmitted to the forming section 103. The extruded food raw materials are directly heated by the screw 1, so that the food raw materials can quickly reach the puffing temperature, shortening the time for heating and puffing. All the heat generated by the internal heating can only be directly used for puffing and heating from the inside to the outside, which reduces the energy loss. The internal heating has a fast temperature rise and fall response speed and the least energy loss. The electric heating wire 9 is built into the screw 1 and the temperature sensor 8 is added. The temperature of the screw 1 is measured by the temperature sensor 8, and constant temperature control can be achieved in combination with the temperature measurement outside the barrel 2, thereby ensuring the stability of the product. The food raw materials after puffing and heating are extruded and transported to the forming hole 7, and are formed in the forming hole 7 and then discharged from the barrel 2.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An internal heating screw, characterized in that: The screw rod (1) comprises a connecting section (101), an extrusion section (102), a molding section (103) and a spiral sheet (104); the end of the extrusion section (102) is fixedly connected to the end of the molding section (103); the end of the molding section (103) is fixedly mounted on the end of the connecting section (101); and the spiral sheet (104) is fixedly connected to the surface of the molding section (103); The extrusion section (102) and the molding section (103) are provided with mounting holes (4); a positioner (3) is fixedly mounted on the end of the extrusion section (102); an electric heating wire (9) for heating the screw (1) is fixedly mounted on the side of the positioner (3); a temperature sensor (8) for detecting the temperature of the screw (1) is fixedly mounted on the side of the positioner (3); and the temperature sensor (8) and the electric heating wire (9) are both arranged in the mounting hole (4).

2. The internal heating screw according to claim 1, characterized in that: The forming section (103) is arranged in a conical shape.

3. The internal heating screw according to claim 1, characterized in that: The groove depth of the spiral sheet (104) and the forming section (103) gradually becomes shallower from right to left.

4. A barrel, comprising an internally heated screw according to any one of claims 1 to 3, characterized in that: It comprises a barrel (2), and a heating chamber (5) and a forming hole (7) provided inside the barrel (2), wherein the forming hole (7) is connected to the heating chamber (5), and the screw (1) is movably mounted inside the barrel (2).

5. A barrel according to claim 4, characterized in that: The molding section (103) is arranged in the heating chamber (5), and the extrusion section (102) is arranged in the molding hole (7).

6. A barrel according to claim 5, characterized in that: The edge of the spiral sheet (104) is in contact with the inner wall of the heating chamber (5).

7. A barrel according to claim 6, characterized in that: The barrel (2) is provided with a material discharge port (6), and the material discharge port (6) is in communication with the heating chamber (5).

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