Raw material premixing device

Abstract

The invention relates to the technical field of batch type discontinuous mechanical mixing or kneading devices, in particular to a raw material premixing device. The raw material premixing device comprises a bottom base plate, a support is fixed to the bottom base plate, a motor is fixedly installed on the support, an output shaft of the motor is connected with a fixing device, the fixing device is used for fixing a material barrel, the motor is used for driving the fixing device to turn over, the fixing device comprises a bottom plate, and a vibration module is installed on the lower surface of the bottom plate. A rotary electric connector is installed on an output shaft of the motor and connected with the support, one end of the rotary electric connector is connected with the vibration module through a wire, and the other end of the rotary electric connector is used for being connected with a power line. The raw material premixing device disclosed by the invention can be used for gradually crushing caked precipitates into small blocks, and can be matched with the overturning of the charging basket, so that the uniform mixing of raw materials and the precipitates in the charging basket can be accelerated, the waste of the raw materials is avoided, the production efficiency of insulating parts can be improved, and the quality of the manufactured insulating parts is also guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of batch-type, discontinuous mechanical mixing or kneading devices, in particular to a raw material premixing device. Background Art

[0002] Epoxy resin, as a thermosetting resin, has the characteristics of high insulation performance, high load-bearing capacity and good sealing performance. It is widely used in the insulation layer packaging of high and low voltage electrical appliances, motors, electronic components and GIS and other power equipment. At present, a mixed liquid of epoxy resin and filler and a mixed liquid of filler and curing agent are usually used as the production raw materials of insulating parts. The raw material manufacturer will add the filler to the epoxy resin and curing agent respectively according to the proportion, and then package the two raw materials in the material barrel respectively. When preparing insulating parts, the manufacturer of insulating parts needs to pour the purchased two raw materials into the stirring device at the same time for stirring, and use vacuum casting technology to cast the insulating parts. Vacuum casting can timely discharge the bubbles in the raw materials and can greatly improve the quality of the insulating parts, which has promoted the development of power transmission and transformation technology. The process flow of vacuum casting mainly includes material pretreatment, material premixing, precuring, demoulding and molding, curing, post-processing, inspection and packaging. When the two raw materials are premixed, due to the density difference between the filler and the epoxy resin and the curing agent, the filler is likely to settle at the bottom of the barrel, which in turn causes the raw materials in the barrel to form stratification. Since the raw materials are generally purchased in bulk and stored in warehouses, the raw materials in some barrels are prone to lumps after being left standing for a long time. The lumped sediment will stick to the bottom of the barrel and is difficult to pour out, resulting in waste of raw materials and uneven composition of the raw materials. Even if they are taken out manually, part of the raw materials will be wasted, and it will seriously affect production efficiency.

[0003] In response to the above problems, a Chinese utility model patent with authorization announcement number CN207307739U and authorization announcement date 2018.05.04 discloses a raw material homogenizer, which includes a base, a bracket and a barrel fastening frame, the barrel fastening frame is used to fix the barrel, the bracket is fixedly installed on the base, a motor is fixedly connected to the bracket, the motor shaft of the motor is rotatably connected to the barrel fastening frame through a bearing, the barrel fastening frame includes a left baffle and a right baffle, an upper baffle and a lower baffle are respectively connected between the two ends of the left baffle and the right baffle, a fixed curved plate and a movable fastening splint are also connected between the left baffle and the right baffle, and the fixed curved plate and the movable fastening splint are connected. The movable fastening clamps are arranged on both sides of the left baffle and the right baffle to form a circular clamping space. The two ends of the fixed curved plate are respectively fixed to the left baffle and the right baffle and are located on the same side as the upper baffle and the lower baffle. The movable fastening clamp includes two movable curved plates connected by locking members, and the two movable curved plates are respectively hinged to the left baffle and the right baffle. When the material barrel needs to be placed, the locking member is removed and the two movable curved plates are flipped away from each other. After the material barrel is placed in the clamping space, the movable curved plate is reset and the locking member is reinserted to fix the material barrel. Then the motor is turned on, and the motor shaft will drive the material barrel fastening frame to rotate to evenly mix the raw materials in the material barrel.

[0004] The above scheme mixes the layered raw materials in the barrel evenly by turning over the barrel, but the mixing effect is good only for the raw materials without lumps of sediment at the bottom of the barrel. For the sediment that has already lumped and adhered to the bottom of the barrel, it is not possible to evenly mix the lumps of sediment adhered to the bottom of the barrel with the raw materials simply by turning over the barrel repeatedly, or it takes a long time for the motor to drive the barrel to turn over to achieve complete mixing of the raw materials. The mixing effect is not ideal for the raw materials that have been placed for a long time and have lumps formed by sedimentation at the bottom, which seriously affects the production efficiency of insulating parts. Summary of the invention

[0005] The object of the present invention is to provide a raw material premixing device, aiming to solve the problem that the block sediment adhering to the bottom of the barrel cannot be evenly mixed with the raw material, which affects the production efficiency of the insulating parts.

[0006] To achieve the above object, the raw material premixing device of the present invention adopts the following technical scheme: The raw material premixing device comprises a bottom plate, a support is fixed on the bottom plate, a motor is fixedly installed on the support, a fixing device is connected to the output shaft of the motor, the fixing device is used to fix the barrel, and the motor is used to drive the fixing device to flip, the fixing device comprises a bottom plate, a vibration module is installed on the lower surface of the bottom plate, a rotating electric connector is installed on the output shaft of the motor, the rotating electric connector is connected to the support, one end of the rotating electric connector is connected to the vibration module through a wire, and the other end is used to be connected to a power line.

[0007] Furthermore, the fixing device also includes a locking assembly and a locking assembly. The locking assembly includes an active flip flap and a movable telescopic flap. The active flip flap and the movable telescopic flap are connected to each other to form a placement space for placing the barrel. The active flip flap and the movable telescopic flap are connected by threaded fasteners.

[0008] Furthermore, the active flip flap is fixed to the output shaft of the motor through a connecting rod, and the movable telescopic flap is connected to an electric telescopic rod for controlling the movable telescopic flap to extend or retract toward or away from the active flip flap. An insulation box is provided on the bottom substrate, which surrounds the fixing device inside, and the electric telescopic rod is rotatably connected to the inner wall of the insulation box.

[0009] Furthermore, the locking assembly includes two relatively arranged locking rods, and the active flip flap and the movable telescopic flap are respectively provided with locking grooves. The lower ends of the two locking rods are fixedly locked in the corresponding locking grooves, and the upper ends are used to limit the upper surface of the barrel.

[0010] Furthermore, the active flip flap is fixedly connected to the bottom plate via a connecting plate, and when the output shaft of the motor drives the active flip flap to flip, the bottom plate flips accordingly.

[0011] Furthermore, the thermal insulation box comprises a rectangular frame with an opening at one side, the rectangular frame is fixedly mounted on the bottom base plate and a door panel is detachably mounted at the opening, and a visual glass is mounted on the door panel.

[0012] Furthermore, the thermal insulation box also includes a top plate that is detachably mounted above the rectangular frame, and the top plate, the door plate, the bottom plate and the rectangular frame together constitute a closed thermal insulation box.

[0013] Furthermore, a temperature control device is installed in the insulated box, and the temperature control device includes a heating plate installed in the insulated box. A control panel is installed on the outer wall of the insulated box, and the control panel is used to control the operation of the heating plate.

[0014] Furthermore, the electric telescopic rod is fixed on the side wall of the rectangular frame and its central axis coincides with the central axis of the connecting rod and the output shaft of the motor. The connecting rod passes through another side wall of the rectangular frame opposite to the side wall connected to the electric telescopic rod and is fixedly connected to the active flip flap.

[0015] Furthermore, a handle is provided on the rectangular frame, and a universal wheel is connected below the bottom substrate, and the handle is used to pull the bottom substrate to move.

[0016] Beneficial effects: The raw material premixing device of the present invention is an improved invention. By fixing the motor on the support, there is a certain distance between the motor and the bottom plate, providing space for the overturning of the barrel, and connecting the output shaft of the motor to the fixing device, the motor can drive the fixing device to rotate, and then drive the barrel fixed by the fixing device to overturn, so as to achieve uniform mixing of the raw materials in the barrel. A vibration module is installed on the lower surface of the bottom plate of the fixing device, and the vibration module is energized by rotating the electrical connector, so that the vibration module can vibrate the agglomerated sediment at the bottom of the barrel, gradually breaking the agglomerated sediment into small pieces, and at the same time, with the overturning of the barrel, the uniform mixing of the raw materials and sediment inside the barrel can be accelerated, avoiding the waste of raw materials, and can improve the production efficiency of the insulating parts, and the quality of the insulating parts prepared is also guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the raw material premixing device of the present invention; Figure 2 This is a schematic diagram of the main structure of an embodiment of the raw material premixing device of the present invention with the door panel removed; Figure 3 The figure is a schematic diagram of the top view of the raw material premixing device of one embodiment of the present invention with the top plate removed.

[0018] In the figure: 1. base plate; 2. support; 3. motor; 4. barrel; 5. bottom plate; 6. vibration module; 7. locking assembly; 8. positioning assembly; 9. active flip flap; 10. movable telescopic flap; 11. storage space; 12. threaded fastener; 13. electric telescopic rod; 14. insulation box; 15. connecting rod; 16. rectangular frame; 17. door panel; 18. visual glass; 19. top plate; 20. control panel; 21. handle; 22. universal wheel; 23. connecting plate; 24. rotating electrical connector; 25. wire; 26. power cord; 27. connecting rod. DETAILED DESCRIPTION

[0019] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0020] In the process of preparing insulating parts, a mixed liquid of filler and epoxy resin and a mixed liquid of filler and curing agent are often used for mixing, and vacuum casting technology is used for preparing insulating parts. Since the purchased raw materials will be stored in the warehouse, the raw materials in the barrel will produce precipitation and agglomeration after standing for a long time. Before preparing the insulating parts, the raw materials need to be mixed evenly. The prior art fixes the barrel by a movable fastening splint, and connects the rotating shaft of the motor with the movable fastening splint. The movable fastening splint is driven by the rotating shaft of the motor, and then the barrel is driven to rotate, so as to achieve uniform mixing of the raw materials in the barrel. However, in the case where the sediment at the bottom of the barrel is agglomerated and adheres to the bottom of the barrel, it is impossible to achieve uniform mixing of the block sediment and the raw materials only by repeatedly turning over the barrel. In order to make the agglomerated sediment at the bottom of the barrel quickly form a uniform mixture with the raw materials, a vibrating object can be installed at the bottom of the barrel, and the agglomerated sediment at the bottom of the barrel can be vibrated by long-term vibration to break the agglomerated sediment into small pieces. At this time, the mixing of the sediment and the raw materials can be accelerated by turning over the barrel. Based on the above inventive concept, the present invention proposes a raw material mixing device, which installs a vibration module under the device that fixes the barrel to vibrate and break the lumped sediment stuck to the bottom of the barrel, thereby accelerating the mixing speed of the sediment and the raw material, saving raw materials and improving the production efficiency of insulating parts.

[0021] Embodiments of the raw material premixing device of the present invention: See also Figures 1 to 3 As a basic embodiment of the present invention, the raw material premixing device includes a bottom substrate 1, a support 2 is fixedly arranged on the bottom substrate 1, a motor 3 is fixedly installed on the support 2, the output shaft of the motor 3 is connected to a fixing device, the fixing device is used to fix the barrel 4, the motor 3 is used to drive the fixing device to flip, and then drive the barrel 4 fixed by the fixing device to flip, so as to achieve uniform mixing of the raw materials in the barrel 4, by fixing the motor 3 on the support 2, so that there is a certain distance between the motor 3 and the bottom substrate 1, it can provide space for the flipping of the barrel 4, the fixing device includes a bottom plate 5, the lower surface of the bottom plate 5 is installed with a vibration module 6, the vibration module 6 is used to transmit the vibration generated by it to the bottom of the barrel 4, the motor 3 A rotating electrical connector 24 is installed on the output shaft, and the rotating electrical connector 24 is connected to the support 2. One end of the rotating electrical connector 24 is connected to the vibration module 6 through a wire 25, and the other end is used to connect to the power line 26. The rotating electrical connector 24 can energize the vibration module 6 to ensure the vibration state of the vibration module 6. When the vibration module 6 vibrates, it can vibrate the block sediment at the bottom of the barrel 4, so that the block sediment is gradually broken into small pieces, which is convenient for mixing the sediment and the raw material. At the same time, with the overturning of the barrel 4, the mixing of the raw material and the sediment inside the barrel 4 can be accelerated, thereby avoiding the waste of raw materials, and improving the production efficiency of the insulating parts. The quality of the insulating parts prepared is also guaranteed.

[0022] The vibration module 6 in this embodiment can use ultrasonic vibration or physical vibration, as long as it can achieve vibration of the barrel 4. The vibration module 6 is a prior art and can be specifically selected according to usage requirements, which will not be described here.

[0023] As a preferred embodiment of the present invention, the fixing device also includes a locking assembly 7 and a locking assembly 8. The locking assembly 7 includes an active flip flap 9 and a movable telescopic flap 10. The active flip flap 9 and the movable telescopic flap 10 are connected to each other to form a placement space 11 for placing the barrel 4. The active flip flap 9 and the movable telescopic flap 10 are connected by a threaded fastener 12. The barrel 4 is placed in the placement space 11. The bottom plate 5 provides stable support for the barrel 4. A threaded fastener 12 is arranged between the two ends of the active flip flap 9 and the movable telescopic flap 10. The barrel 4 is locked by the threaded fastener 12. The threaded fastener 12 in this embodiment is a screw and a nut. The end of the screw is passed through the active flip flap 9 and the movable telescopic flap 10 at the same time, and the nut is threadedly connected to the end of the screw to achieve the locking of the active flip flap 9 and the movable telescopic flap 10. Such a setting makes the installation of the barrel 4 more convenient, and the connection method is also simple and easy to operate, which can save the overall production time of the insulating parts.

[0024] As a preferred embodiment of the present invention, the active flip flap 9 is fixed to the output shaft of the motor 3 by a connecting rod 27, and the movable telescopic flap 10 is connected to an electric telescopic rod 13 for controlling the movable telescopic flap 10 to extend or retract in the direction close to or away from the active flip flap 9. An insulation box 14 is provided on the bottom substrate 1, which surrounds the fixing device inside, and the electric telescopic rod 13 is rotatably connected to the inner wall of the insulation box 14, that is, the position of the active flip flap 9 remains unchanged. It is only necessary to control the movable telescopic flap 10 to move in the direction close to or away from the active flip flap 9 by the electric telescopic rod 13 to adjust the distance between the active flip flap 9 and the movable telescopic flap 10. Such a setting can make it possible to adapt to different specifications of barrels 4 between the active flip flap 9 and the movable telescopic flap 10, and can also speed up the installation speed of the barrel 4, which is easy to operate.

[0025] As a preferred embodiment of the present invention, the locking assembly 8 includes two relatively arranged locking rods 15, and the active flip flap 9 and the movable telescopic flap 10 are respectively provided with locking grooves. The lower ends of the two locking rods 15 are fixedly clamped in the corresponding locking grooves, and the upper ends are used to limit the upper surface of the barrel 4. When the motor 3 drives the active flip flap 9 to flip, the barrel 4 locked by the active flip flap 9 and the movable telescopic flap 10 through the threaded fasteners 12 flips accordingly. During this process, the bottom plate 5 blocks the lower end of the barrel 4, and the locking rod 15 blocks the upper end of the barrel 4. The bottom plate 5 and the locking rod 15 cooperate to form a block and limit on the upper and lower ends of the barrel 4 to prevent the barrel 4 from falling out from the upper or lower end during the flipping process.

[0026] As a preferred embodiment of the present invention, the active flip flap 9 is fixedly connected to the bottom plate 5 through the connecting plate 23. When the output shaft of the motor 3 drives the active flip flap 9 to flip, the bottom plate 5 flips accordingly. At this time, the material barrel 4 is not actively flipped, but the bottom plate 5 flips with the active flip flap 9 and drives the material barrel 4 to flip together. The bottom plate 5 provides stable support for the material barrel 4, making the material barrel 4 more stable during the flipping process with the output shaft of the motor 3.

[0027] As a preferred embodiment of the present invention, the incubator 14 includes a rectangular frame 16 with an opening on one side. The rectangular frame 16 is fixedly mounted on the bottom substrate 1 and a door panel 17 is detachably mounted at the opening. A visible glass 18 is mounted on the door panel 17. The door panel 17 in this embodiment is mounted along the vertical direction of the rectangular frame 16, that is, a slide groove extending along its width direction is opened on the side of the rectangular frame 16, and blocks that can slide with the slide groove are provided on both sides of the door panel 17. The blocks on the door panel 17 are installed in the slide groove, and the bottom surface of the door panel 17 is in contact with the bottom substrate 1. At this time, the door panel 17 covers the opening of the rectangular frame 16, and the visible glass 18 facilitates observation of the flipping state of the material barrel 4 in the incubator 14. If the material barrel 4 is offset or misaligned during the flipping process, or other components fail, the visible glass 18 can enable the staff to promptly discover the problem, solve the problem or repair the component in a timely manner to avoid causing a larger accident.

[0028] As a preferred embodiment of the present invention, the thermal insulation box 14 also includes a top plate 19 that can be detachably installed above the rectangular frame 16. The top plate 19, the door panel 17, the bottom plate 1 and the rectangular frame 16 together constitute a closed thermal insulation box 14. The installation method of the top plate 19 is consistent with the installation method of the door panel 17, which will not be repeated here. When installing the material barrel 4, the door panel 17 and the top plate 19 can be removed to increase the activity space and facilitate the installation of the material barrel 4. After the material barrel 4 is installed, the door panel 17 and the top plate 19 are reinstalled on the rectangular frame 16 to form a closed thermal insulation box 14, so that the material barrel 4 can work in an independent and undisturbed space. The closed thermal insulation box 14 has a protective effect on the material barrel 4.

[0029] As a preferred embodiment of the present invention, a temperature control device is installed in the insulation box 14, and the temperature control device includes a heating plate installed in the insulation box. The temperature control device is a prior art and will not be described in detail here. A control panel 20 is installed on the outer wall of the insulation box 14, and the control panel 20 is used to control the operation of the heating plate, that is, the temperature control device is electrically connected to the control panel 20. During the process of the motor 3 driving the barrel 4 to flip, the heating plate starts to heat through the control panel 20, so that the temperature in the insulation box 14 is maintained in a temperature range higher than the room temperature, which can realize preheating of the raw materials in the barrel without transferring the raw materials to an oven or preheating equipment for preheating, and the raw materials can be mixed more evenly under a certain temperature, thereby improving the mixing speed of the raw materials, shortening the time required for mixing, and saving time and manpower for transferring the raw materials to other equipment, simplifying the process flow, and improving production efficiency.

[0030] As a preferred embodiment of the present invention, the electric telescopic rod 13 is fixed on the side wall of the rectangular frame 16 and its central axis coincides with the central axis of the connecting rod 27 and the output shaft of the motor 3. The connecting rod 27 passes through the other side wall of the rectangular frame 16 that is opposite to the side wall connected to the electric telescopic rod 13 and is fixedly connected to the active flip flap 9. The distance between the movable telescopic flap 10 and the active flip flap 9 is adjustable, and no matter how the distance between the movable telescopic flap 10 and the active flip flap 9 changes, the movable telescopic flap 10 and the active flip flap 9 always remain coaxial. Such a setting can prevent the barrel 4 from being squeezed and deformed in other directions when the barrel 4 is locked.

[0031] As a preferred embodiment of the present invention, a handle 21 is provided on the rectangular frame 16, and a universal wheel 22 is connected to the bottom of the bottom substrate 1. The staff can pull the bottom substrate 1 to a designated position by applying a pulling force to the handle 21. When installing the barrel 4, since the barrel 4 is too heavy, it takes a lot of manpower for the workers to move the barrel 4 to the insulation box 14. Therefore, the handle 21 can be used to move the entire device to the position of the barrel 4, saving manpower.

[0032] The use process of the raw material premixing device of the present invention is as follows: first, the staff applies a pulling force to the handle 21 to move the entire device to the position where the barrel 4 is located, removes the top plate 19 and the door plate 17 to make a larger installation space, and then controls the movable telescopic flap 10 to contract by the electric telescopic rod 13, so that the movable telescopic flap 10 moves away from the active flip flap 9 to make room for the placement space 11 of the barrel 4, and the staff moves the barrel 4 to the top of the bottom plate 5, and aligns the outer peripheral surface of the barrel 4 with the inner surface of the active flip flap 9. The wall is fitted, and then the electric telescopic rod 13 is controlled to extend, and the electric telescopic rod 13 drives the movable telescopic flap 10 to move in the direction close to the active flip flap 9 until the inner wall of the movable telescopic flap 10 fits the outer circumference of the barrel, and the electric telescopic rod 13 is controlled to stop extending. At this time, the movable telescopic flap 10 and the active flip flap 9 are connected by the threaded fastener 12, so as to achieve the locking of the barrel 4. At this time, the door panel 17 and the top panel 19 are reinstalled into the rectangular frame 16 to form a closed insulation box 14; then the electric telescopic rod 13 is controlled to stop extending. The power line 26 is connected to the power socket, and the power line 26 energizes the vibration module 6 through the rotating electrical connector 24. The vibration module 6 starts to vibrate and acts on the agglomerated sediment at the bottom of the barrel 4. At the same time, the motor 3 is started, and the output shaft of the motor 3 drives the active flip flap 9 locked with the barrel 4 to flip. The active flip flap 9 will drive the movable telescopic flap 10, the bottom plate 5 and the clamping rod 15 connected thereto to flip accordingly. At the same time, the barrel 4 fixed and limited by the active flip flap 9, the movable telescopic flap 10, the bottom plate 5 and the clamping rod 15 will also flip accordingly. Such a setting can prevent the barrel 4 from being thrown out during the flipping process. At the same time, the control panel 20 controls the heating plate to start heating up to preheat the raw materials in the barrel 4. With the flipping of the barrel 4 and the vibration of the vibration module 6, as well as the temperature above room temperature in the insulated box 14, the agglomerated sediment at the bottom of the barrel 4 is gradually broken into small pieces, and finally evenly mixed with the raw materials, saving the process of transferring the raw materials to the preheating equipment and improving the production efficiency of the insulating parts.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A raw material premixing device, comprising a base plate, a support fixed on the base plate, a motor fixedly mounted on the support, an output shaft of the motor connected to a fixing device, the fixing device is used to fix the barrel, and the motor is used to drive the fixing device to flip, characterized in that: The fixing device includes a base plate, a vibration module is installed on the lower surface of the base plate, a rotating electrical connector is installed on the output shaft of the motor, the rotating electrical connector is connected to the support, one end of the rotating electrical connector is connected to the vibration module through a wire, and the other end is used to connect to the power line.

2. The raw material premixing device according to claim 1, characterized in that: The fixing device also includes a locking assembly and a locking assembly. The locking assembly includes an active flip flap and a movable telescopic flap. The active flip flap and the movable telescopic flap are connected to each other to form a placement space for placing the barrel. The active flip flap and the movable telescopic flap are connected by threaded fasteners.

3. The raw material premixing device according to claim 2, characterized in that: The active flip flap is fixed to the output shaft of the motor through a connecting rod, and the movable telescopic flap is connected to an electric telescopic rod for controlling the movable telescopic flap to extend or retract toward or away from the active flip flap. An insulation box is provided on the bottom substrate, which surrounds the fixing device inside, and the electric telescopic rod is rotatably connected to the inner wall of the insulation box.

4. The raw material premixing device according to claim 2, characterized in that: The clamping assembly includes two relatively arranged clamping rods, and the active flip flap and the movable telescopic flap are respectively provided with clamping grooves. The lower ends of the two clamping rods are fixedly clamped in the corresponding clamping grooves, and the upper ends are used to limit the upper surface of the barrel.

5. The raw material premixing device according to claim 2, characterized in that: The active flip flap is fixedly connected to the bottom plate via a connecting plate, and when the output shaft of the motor drives the active flip flap to flip, the bottom plate flips accordingly.

6. The raw material premixing device according to claim 3, characterized in that: The heat preservation box comprises a rectangular frame with an opening at one side. The rectangular frame is fixedly mounted on a bottom base plate and a door panel is detachably mounted at the opening. The door panel is provided with a visual glass.

7. The raw material premixing device according to claim 6, characterized in that: The thermal insulation box also includes a top plate which is detachably mounted on the rectangular frame. The top plate, the door plate, the bottom plate and the rectangular frame together form a closed thermal insulation box.

8. The raw material premixing device according to claim 7, characterized in that: A temperature control device is installed in the thermal insulation box, and the temperature control device includes a heating plate installed in the thermal insulation box. A control panel is installed on the outer wall of the thermal insulation box, and the control panel is used to control the operation of the heating plate.

9. The raw material premixing device according to claim 3 or 6, characterized in that: The electric telescopic rod is fixed on the side wall of the rectangular frame and its central axis coincides with the central axis of the connecting rod and the output shaft of the motor. The connecting rod passes through another side wall of the rectangular frame opposite to the side wall connected to the electric telescopic rod and is fixedly connected to the active flip flap.

10. The raw material premixing device according to claim 7, characterized in that: A handle is provided on the rectangular frame, and a universal wheel is connected below the bottom base plate. The handle is used to pull the bottom base plate to move.

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