Single screw extrusion apparatus for single, double and multi-base pharmaceuticals

Abstract

The utility model provides a single screw extrusion equipment of single base drug, double base drug and multibase drug, and this equipment includes screw shaft, rotating water jacket, screw shaft fixed seat, screw cavity casing and casing cooling structure, the screw shaft includes axle body, sealing end cover and cooling water pipe, the outer wall of axle body one end is provided with spiral vane, the other end of axle body is optical axis structure, the optical axis structure of other end of axle body is provided with axle body water inlet and axle body water outlet, the one end of axle body outer wall provided with spiral vane is provided with cooling hole along axle body central axis direction, and the screw cavity casing is provided with pressure -relief mouth, and the pressure -relief mouth is located screw cavity casing one end close to screw shaft fixed seat. The utility model discloses through the double cooling of screw shaft and screw cavity casing, can control the temperature of material between screw shaft and screw cavity casing in the suitable range, can guarantee the stability of material temperature between screw shaft and screw cavity casing when continuously working, has improved the safety and production efficiency of equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of material forming production equipment, specifically to a single-screw extrusion equipment for single-base, double-base, and multi-base drugs. Background Technology

[0002] Existing material extrusion molding equipment includes screw extrusion molding equipment and hydraulic cylinder extrusion molding equipment. For sensitive materials such as single-base, double-base, and multi-base pharmaceuticals, which are sensitive to temperature and pressure and prone to explosion, existing screw extrusion molding equipment is often used for extruding non-sensitive materials. During the extrusion process, as the screw continuously works, heat easily accumulates within the screw cavity, which can easily cause explosions and other safety accidents for sensitive materials.

[0003] The existing cold extrusion molding of single-base, double-base, and multi-base gunpowder involves placing the lumpy gunpowder in a cartridge and extruding it through a hydraulic cylinder. Although this avoids the accumulation of heat inside the cartridge during continuous production, the machine needs to be stopped, the hydraulic cylinder push rod removed, and the material refilled after the material is extruded. This results in low production efficiency and makes it impossible to achieve continuous automated production. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a single-screw extrusion equipment for single-base, double-base, and multi-base drugs. This equipment can achieve continuous production and improve production efficiency. At the same time, it can avoid heat accumulation during continuous production, thereby improving the safety of continuous extrusion molding of sensitive materials such as single-base, double-base, and multi-base drugs.

[0005] To address the aforementioned problems, this utility model provides a single-screw extrusion apparatus for single-base, double-base, and multi-base drugs, characterized in that it comprises:

[0006] A screw shaft includes a shaft body, a sealing end cap, and a cooling water pipe. One end of the shaft body has helical blades on its outer wall, and the other end has a smooth shaft structure with a shaft inlet and an outlet. The end of the shaft body with the helical blades has a cooling hole along the central axis of the shaft body, which is connected to the shaft outlet. The cooling water pipe is disposed within the cooling hole along the central axis of the shaft body, with one end fixedly connected to the shaft body and the other end connected to the shaft body communicating with the shaft inlet. The sealing end cap is located at the opening of the cooling hole and is sealed to the shaft body. The other end of the cooling water pipe is spaced apart from the sealing end cap.

[0007] A rotating water jacket is mounted on a shaft, with its inlet connected to the shaft's inlet and its outlet connected to the shaft's outlet.

[0008] A screw shaft fixing seat is fitted onto one end of the shaft body optical shaft structure, and the screw shaft fixing seat is rotatably connected to the shaft body;

[0009] A screw cavity housing is fitted onto the outer end of the helical blade of the shaft. One end of the screw cavity housing is fixedly connected to the screw shaft fixing seat. A pressure relief port is provided on the screw cavity housing, and the pressure relief port is located at the end of the screw cavity housing near the screw shaft fixing seat.

[0010] A housing cooling structure is provided, which covers the outside of the screw cavity housing and is used to cool the screw cavity housing.

[0011] The above-mentioned single-screw extrusion equipment for single-base, double-base, and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials further includes a gasket, which is disposed between the screw cavity housing and the spiral blades disposed on the outer wall of the shaft.

[0012] The above-mentioned single-screw extrusion equipment for single-base, double-base, and multi-base drugs is characterized in that the screw cavity housing includes a feeding section and a cooling section, one end of the feeding section is fixedly connected to the screw shaft fixing seat, the other end of the feeding section is fixedly connected to the cooling section, and the housing cooling structure covers the outside of the cooling section.

[0013] The above-mentioned single-screw extrusion equipment for single-base, double-base, and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials further includes a pressure sensor and a temperature sensor. The pressure sensor and the temperature sensor are both located at the end of the cooling section away from the feeding section, and are used to measure the pressure and temperature of the extruded material in the screw cavity shell in real time.

[0014] The above-mentioned single-screw extrusion equipment for single-base, double-base, and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials further includes a die fixing component. The die fixing component includes a die mounting base and a connecting part. The die mounting base is located at the end of the screw cavity housing away from the screw shaft fixing base. The connecting part is located at the connection between the die mounting base and the screw cavity housing, and the connecting part is used to connect the die mounting base and the screw cavity housing together.

[0015] The mold mounting base has a mold mounting hole that is compatible with the corresponding mold, and a safety ring is provided on the wall of the mold mounting hole to block the corresponding mold.

[0016] The above-mentioned single-screw extrusion equipment for single-base, double-base, and multi-base drugs is characterized in that the screw shaft fixing seat includes a fixing seat body, a thrust bearing, and a copper sleeve. The fixing seat body is disposed on the optical axis section of the shaft body, the copper sleeve is installed in the fixing seat body and is located between the inner wall of the fixing seat body and the outer wall of the shaft body, the optical axis section of the shaft body is provided with a shaft platform, one end of the thrust bearing acts on the shaft platform, and the other end of the thrust bearing acts on the inner wall of the fixing seat body to provide a force along the axial direction of the shaft body.

[0017] The aforementioned single-screw extrusion equipment for single-base, double-base, and multi-base pharmaceutical materials is characterized in that the single-screw extrusion device for sensitive materials further includes a drive motor, a reducer, a torque sensor, and a safety coupling. The drive motor is installed at the input end of the reducer, and the output shaft of the drive motor is connected to the input end of the reducer. The output end of the reducer is connected to one end of the torque sensor via a short shaft, and the other end of the torque sensor is connected to one end of the safety coupling via a short shaft. The other end of the safety coupling is connected to one end of the screw shaft.

[0018] The aforementioned single-screw extrusion equipment for single-base, dual-base, and multi-base pharmaceuticals is characterized in that the single-screw extrusion device for sensitive materials further includes a double-tapered screw feeding device. The double-tapered screw feeding device includes a screw drive component, a synchronous conveying twin screw, a twin screw cavity, a feed funnel, and a screw cavity outlet. The screw drive component is connected to the synchronous conveying twin screw and is used to drive the synchronous conveying twin screw to rotate. The threaded conveying section of the synchronous conveying twin screw is located inside the twin screw cavity. The feed funnel is located above the twin screw cavity. The screw cavity outlet is located along the axial direction of the synchronous conveying twin screw and is connected to the feed port on the screw cavity housing.

[0019] The above-mentioned single-screw extrusion equipment for single-base, double-base, and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials further includes a feeding device, the feeding device including a material conveying trolley and a trolley lifting component, the trolley lifting component being disposed on one side of the double-cone screw feeding device, and the trolley lifting component being used to grab the material conveying trolley and pour the material in the material conveying trolley into the feed funnel.

[0020] The single-screw extrusion equipment for single-base, dual-base, and multi-base drugs described above is characterized in that the single-screw extrusion device for sensitive materials further includes a molding material collection device. The molding material collection device includes a belt conveyor and a material distribution device. One end of the belt conveyor is located below the mold outlet, and the other end of the belt conveyor is located above the material distribution device. The material distribution device includes a telescopic support and a chute. The upper end of the chute is connected to the top of the telescopic support, and the lower end of the chute extends away from the telescopic support. There are multiple chutes, and the multiple chutes are evenly distributed along the circumference of the telescopic support.

[0021] This utility model has the following advantages compared with the prior art:

[0022] 1. This utility model can realize continuous production and improve production efficiency; at the same time, it can avoid heat accumulation during continuous production and improve the safety of continuous extrusion molding of sensitive materials.

[0023] 2. By cooling the screw shaft, this utility model enables the timely release of energy inside the extruded material, preventing energy from accumulating inside the material, causing the internal temperature to rise and exceed the safe value, thus preventing safety accidents.

[0024] 3. In this utility model, a gasket is provided between the helical blades on the outer wall of the screw cavity and the outer wall of the shaft. The gasket can prevent the helical blades from rubbing against the screw cavity, thus avoiding wear of the helical blades and safety accidents caused by sparks or heat generated by friction.

[0025] 4. The mold fixing component of this utility model is equipped with mechanical protection. The maximum internal pressure of the mold is limited by the breakage of the safety ring, which effectively avoids the occurrence of safety accidents.

[0026] The utility model will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0027] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the single-screw extrusion equipment for sensitive materials in this embodiment of the present invention.

[0029] Figure 2 This is a front view of the single-screw extrusion equipment for sensitive materials in an embodiment of this utility model.

[0030] Figure 3 This is a cross-sectional view of the single-screw extrusion device for sensitive materials in an embodiment of this utility model.

[0031] Figure 4 for Figure 3 Enlarged view of point A.

[0032] Figure 5 for Figure 3 Enlarged view of point B.

[0033] Figure 6 for Figure 3 Enlarged view of point C.

[0034] Figure 7 for Figure 3 Enlarged view of point D.

[0035] Figure 8 This is a top view of the single-screw extrusion device for sensitive materials in an embodiment of this utility model.

[0036] Figure 9 This is a three-dimensional structural diagram of the double-cone screw feeding device in an embodiment of this utility model.

[0037] Figure 10 This is a top view of the double-cone screw feeding device in an embodiment of this utility model.

[0038] Figure 11 This is a three-dimensional structural diagram of the feeding device in an embodiment of the present invention.

[0039] Figure 12 This is a three-dimensional structural diagram of the molding material collection device in an embodiment of this utility model.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10—Screw shaft; 11—Shaft body; 12—Sealing end cap;

[0042] 13—Cooling water pipe; 14—Shaft inlet; 15—Shaft outlet;

[0043] 16—Cooling hole; 20—Rotating water jacket; 30—Screw shaft fixing seat;

[0044] 31—Fixed base body; 32—Thrust bearing; 33—Copper sleeve;

[0045] 40—Screw cavity housing; 41—Pressure relief port; 42—Feed section;

[0046] 43—Cooling section; 44—Sleeve; 45—Shell cooling structure;

[0047] 50—Mold fixing component; 51—Mold mounting base; 52—Connecting part;

[0048] 511—Mold mounting hole; 512—Safety ring; 61—Pressure sensor;

[0049] 62—Temperature sensor; 63—Drive motor; 64—Reducer;

[0050] 65—Torque sensor; 66—Safety coupling; 70—Double tapered screw feeding device;

[0051] 71—Screw drive component; 72—Synchronous conveying twin screw; 73—Twin screw cavity;

[0052] 74—Feed funnel; 75—Screw cavity outlet; 80—Feeding device;

[0053] 81—Material transport trolley; 82—Trolley lifting components; 90—Molded material collection device;

[0054] 91—Belt conveyor; 92—Material distribution device; 921—Telescopic support;

[0055] 922—Slide groove. Detailed Implementation

[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0057] Sensitive materials are those that are sensitive to temperature and pressure and can achieve the desired effect through extrusion. Although they can achieve the desired effect through extrusion, their sensitivity to pressure and temperature can easily cause material damage and safety accidents during the extrusion process. For example, gunpowder can easily explode when the pressure or temperature exceeds the safe value during the extrusion molding process, causing a safety accident.

[0058] like Figures 2 to 8As shown in this embodiment, a single-screw extrusion apparatus for single-base, dual-base, and multi-base pharmaceutical materials is disclosed. This apparatus includes a screw shaft 10, a rotating water jacket 20, a screw shaft fixing seat 30, a screw cavity housing 40, and a housing cooling structure 45. Through dual cooling of the screw shaft 10 and the screw cavity housing 40, the temperature of the material between the screw shaft 10 and the screw cavity housing 40 can be controlled within a suitable range. For screw extrusion molding equipment, due to its continuous operation, heat easily accumulates inside the extruded material during the continuous extrusion process, leading to temperature increases and potential safety accidents. This invention, by cooling the screw shaft 10, allows the energy inside the extruded material to be released in a timely manner, preventing energy accumulation inside the material and causing the internal temperature to rise beyond safe limits, thus preventing safety accidents. The single-screw extrusion apparatus for sensitive materials in this embodiment can ensure the stability of the material temperature between the screw shaft 10 and the screw cavity housing 40 during continuous operation, improving the safety and production efficiency of the equipment.

[0059] The screw shaft 10 includes a shaft body 11, a sealing end cap 12, and a cooling water pipe 13. A helical blade is provided on the outer wall of one end of the shaft body 11, and the other end of the shaft body 11 has a smooth shaft structure. A shaft inlet 14 and a shaft outlet 15 are provided on the smooth shaft structure at the other end of the shaft body 11. A cooling hole 16 is provided along the central axis of the shaft body 11 at the end with the helical blade, and the cooling hole 16 is connected to the shaft outlet 15. The cooling water pipe 13 is disposed within the cooling hole 16 along the central axis of the shaft body 11. One end of the cooling water pipe 13 is fixedly connected to the shaft body 11, and the end of the cooling water pipe 13 connected to the shaft body 11 is connected to the shaft inlet 14. The sealing end cap 12 is disposed at the opening of the cooling hole 16 and is sealed to the shaft body 11. The other end of the cooling water pipe 13 is spaced apart from the sealing end cap 12; the rotating water jacket 20 is installed on the shaft 11, and the water inlet of the rotating water jacket 20 is connected to the water inlet 14 of the shaft, and the water outlet of the rotating water jacket 20 is connected to the water outlet 15 of the shaft; the screw shaft fixing seat 30 is fitted onto one end of the shaft shaft structure of the shaft 11, and the screw shaft fixing seat 30 is rotatably connected to the shaft 11; the screw cavity housing 40 is fitted onto the outside of the spiral blade end of the shaft 11, one end of the screw cavity housing 40 is fixedly connected to the screw shaft fixing seat 30, and a pressure relief port 41 is provided on the screw cavity housing 40, the pressure relief port 41 being located at one end of the screw cavity housing 40 near the screw shaft fixing seat 30; the housing cooling structure 45 covers the outside of the screw cavity housing 40 and is used to cool the screw cavity housing 40.

[0060] like Figures 3 to 7As shown, in this embodiment, a cooling hole 16 is formed in the shaft 11 along its central axis. A cooling water pipe 13 is disposed in the cooling hole 16. The cooling hole 16 is connected to a rotating water jacket 20 disposed outside the shaft 11 through a shaft outlet 15 on the shaft 11. One end of the cooling water pipe 13 is connected to the external rotating water jacket 20 through a shaft inlet 14 on the shaft 11. The rotating water jacket 20 is rotatably sealed to the shaft 11, so that the cooling medium can pass through the rotating water jacket 20. The water inlet of the sleeve 20 enters the shaft inlet 14, then enters the cooling water pipe 13 from the shaft inlet 14, and flows from one end of the cooling water pipe 13 connected to the shaft inlet 14 to the other end, and then flows out of the cooling water pipe 13, enters the channel between the inner wall of the cooling hole 16 and the outer wall of the cooling water pipe 13, and then flows to the shaft outlet 15 from the channel, flows out through the shaft outlet 15, and then enters the outlet of the rotating water sleeve 20, thereby carrying away the heat from the material being squeezed on the outside of the shaft 11.

[0061] like Figure 3 As shown, the above-mentioned single-screw extrusion device for sensitive materials also includes a gasket 44, which is disposed between the screw cavity housing 40 and the spiral blades disposed on the outer wall of the shaft 11.

[0062] In this embodiment, a gasket 44 is provided between the screw cavity housing 40 and the shaft 11. The material of the gasket 44 can be selected according to the sensitive material. It needs to have good stability and low hardness. Low hardness can effectively protect the helical blades on the shaft 11, avoid friction between the helical blades and the screw cavity housing 40, which would cause wear of the helical blades and prevent safety accidents caused by sparks or heat generated by friction. In this embodiment, the gasket 44 is made of copper, which has good stability, low hardness, and excellent thermal conductivity. It can effectively protect the helical blades on the shaft 11, and at the same time, it can quickly transfer the heat in the material to the screw cavity housing 40. Then, the heat is carried away by the housing cooling structure 45, preventing heat accumulation and safety accidents.

[0063] like Figure 2 and Figure 3 As shown, the screw cavity housing 40 includes a feeding section 42 and a cooling section 43. One end of the feeding section 42 is fixedly connected to the screw shaft fixing seat 30, and the other end of the feeding section 42 is fixedly connected to the cooling section 43. The housing cooling structure 45 covers the outside of the cooling section 43. The feeding section 42 is provided with a feeding port, through which the material can enter the single screw cavity and be pushed to the mold by the blades of the single screw, where it is extruded and formed.

[0064] In this embodiment, the shell cooling structure 4550 adopts the form of a water jacket installed on the outside of the screw cavity shell 40. That is, the coolant enters from one end of the shell cooling structure 4550 and flows out from the other end, carrying away the heat in the extruded material along the outer wall of the screw cavity shell 40, thereby controlling the upper limit of the temperature of the extruded material.

[0065] like Figure 3 As shown, the above-mentioned sensitive material single screw extrusion device also includes a pressure sensor 61 and a temperature sensor 62. The pressure sensor 61 and the temperature sensor 62 are both located at the end of the cooling section 43 away from the feeding section 42, and are used to measure the pressure and temperature of the extruded material in the screw cavity housing 40 in real time.

[0066] The aforementioned single-screw extrusion device for sensitive materials also includes a controller, a housing cooling structure 45 circulating water pump, and a main shaft cooling circulating water pump. Temperature sensor 62 and pressure sensor 61 are both connected to the controller and are used to transmit the temperature and pressure information they collect to the controller, respectively. The controller adjusts the rotation speed of the housing cooling structure 45 circulating water pump and the main shaft cooling circulating water pump according to the set value and the collected temperature and pressure information, thereby adjusting the flow rate of the coolant to achieve the purpose of controlling the material temperature.

[0067] like Figure 3 and Figure 4 As shown, the above-mentioned single-screw extrusion device for sensitive materials also includes a die fixing component 50. The die fixing component 50 includes a die mounting base 51 and a connecting part 52. The die mounting base 51 is located at one end of the screw cavity housing 40 away from the screw shaft fixing base 30. The connecting part 52 is detachably located at the connection between the die mounting base 51 and the screw cavity housing 40, and the connecting part 52 is used to connect the die mounting base 51 and the screw cavity housing 40 together.

[0068] like Figure 1 and Figure 2 As shown, the connecting part 52 in this embodiment includes two main components. These two main components have similar structures, both being semi-circular rings. The inner side of each ring has a locking groove for engaging the mold mounting base 51 and the screw cavity housing 40. The cross-section of the locking groove is trapezoidal. One end of each main component is mounted on the screw cavity housing 40 via a rotating shaft. The other ends of the two main components are connected together by a locking component. By adjusting the locking component, the mold mounting base 51 and the screw cavity housing 40 can be mounted together. The locking component can be a bolt. For disassembly, simply loosen the locking component and rotate the two main components to easily remove the mold mounting base 51, facilitating mold replacement.

[0069] The aforementioned mold mounting base 51 has a mold mounting hole 511 adapted to the corresponding mold. A safety ring 512 is provided on the wall of the mold mounting hole 511 to block the corresponding mold. The safety ring 512 mainly serves to limit the upper limit pressure inside the mold. It can be a thin-walled structure that is easily broken, or a structure with a fracture groove at its connection with the mold mounting hole 511. When the internal pressure of the mold exceeds the bearing capacity of the thin-walled structure of the safety ring 512, the thin-walled structure breaks, and the mold slides out along the mold mounting hole 511, releasing the internal pressure. For a structure with a fracture groove, when the internal pressure of the mold exceeds the bearing capacity at the fracture groove of the safety ring 512, the safety ring 512 breaks along the fracture groove, and the mold slides out along the mold mounting hole 511, releasing the internal pressure and ensuring equipment safety.

[0070] The aforementioned safety ring 512 can also be designed as a separate structure from the mold mounting base 51, so that replacement can be made by replacing the safety ring 512 after damage, thereby reducing the cost of replacing parts after damage and lowering the equipment maintenance and usage costs.

[0071] like Figure 3 As shown, in this embodiment, the screw shaft fixing seat 30 includes a fixing seat body 31, a thrust bearing 32, and a copper sleeve 33. The fixing seat body 31 is disposed on the optical axis section of the shaft 11. The copper sleeve 33 is installed inside the fixing seat body 31 and is located between the inner wall of the fixing seat body 31 and the outer wall of the shaft 11. The optical axis section of the shaft 11 is provided with a shaft platform. One end of the thrust bearing 32 acts on the shaft platform, and the other end of the thrust bearing 32 acts on the inner wall of the fixing seat body 31, so as to provide a force along the axial direction of the shaft 11 to the shaft 11.

[0072] like Figure 2 and Figure 3 As shown, the aforementioned single-screw extrusion device for sensitive materials also includes a drive motor 63, a reducer 64, a torque sensor 65, and a safety coupling 66. The drive motor 63 is installed at the input end of the reducer 64, and the output shaft of the drive motor 63 is connected to the input end of the reducer 64. The output end of the reducer 64 is connected to one end of the torque sensor 65 via a short shaft, and the other end of the torque sensor 65 is connected to one end of the safety coupling 66 via a short shaft. The other end of the safety coupling 66 is connected to one end of the screw shaft 10.

[0073] In this embodiment, the drive motor 63 provides high-speed, low-torque power; the reducer 64 provides stable low-speed, high-torque power after reduction; the torque sensor 65 measures the torque and transmits the torque value to the controller. The safety coupling 66, also called a torque limiter, is a component connecting the drive machine and the working machine. Its main function is overload protection. When overload or mechanical failure causes the required torque to exceed a set value, the torque limiter limits the torque transmitted by the transmission system through slippage. In this embodiment, the controller is connected to both the drive motor 63 and the torque sensor 65. Based on data transmitted from the torque sensor 65, temperature sensor 62, and pressure sensor 61, as well as production process parameters, the controller adjusts the motor speed to achieve continuous and efficient production. When the controller receives a torque value greater than the preset value from the torque sensor, it stops the motor, alerting the operator to check the equipment and eliminate potential hazards. The safety coupling can limit the maximum torque transmitted by the motor to the screw shaft 10 when the torque sensor fails, preventing accidents.

[0074] like Figure 1 , Figure 9 and Figure 10 As shown, the aforementioned single-screw extrusion equipment for sensitive materials also includes a twin-tapered screw feeding device 70, which is used to continuously feed the mixed material into the screw cavity of the single-screw extrusion equipment. The twin-tapered screw feeding device 70 includes a screw drive component 71, a synchronous conveying twin screw 72, a twin screw cavity 73, a feed funnel 74, and a screw cavity outlet 75. The screw drive component 71 is connected to the synchronous conveying twin screw 72 and is used to drive the synchronous conveying twin screw 72 to rotate. The threaded conveying section of the synchronous conveying twin screw 72 is located within the twin screw cavity 73. The feed funnel 74 is located above the twin screw cavity 73. The screw cavity outlet 75 is located along the axial direction of the synchronous conveying twin screw 72 and is connected to the feed port on the screw cavity housing 40.

[0075] The synchronous conveying twin screw 72 in this embodiment adopts a timing... Figure 10 The diagram shows two screws rotating synchronously at a certain angle. By controlling the screw drive component 71 to drive the two screws to rotate synchronously, stable and continuous material conveying can be achieved. Simultaneously, the synchronous rotation of the two screws compresses and mixes the material, increasing the density of the material entering the single-screw extrusion chamber and significantly improving the final product quality. In this embodiment, through two consecutive extrusions, the work on the material is continuously and dispersed, avoiding the concentrated work required for a single extrusion molding process, which could cause heat buildup and safety accidents.

[0076] The aforementioned single-screw extrusion device for sensitive materials also includes a feeding device 80, which functions to feed the material into the feed hopper 74 of the double-cone screw feeding device 70. This feeding can be done using various methods such as conveyor belts or manual feeding.

[0077] like Figure 1 and Figure 11 As shown, the feeding device 80 in this embodiment includes a material transport trolley 81 and a trolley lifting component 82. The material transport trolley 81 is used to deliver materials to the vicinity of the double-tapered screw feeding device 70. It can be a motor-driven track trolley, with a track laid on the ground beforehand, and the motor drives the material transport trolley 81 to travel along the track. The trolley lifting component 82 is used to pour the material in the material transport trolley 81 into the feed funnel 74 of the double-tapered screw feeding device 70. The trolley lifting component 82 is located on one side of the double-tapered screw feeding device 70, and the trolley lifting component 82 is used to grab the material transport trolley 81 and pour the material in the material transport trolley 81 into the feed funnel 74. The trolley lifting component 82 includes a sliding plate, a lifting motor, a lifting screw, two lifting arms, and two guide columns. The two guide columns are both vertically fixed on the ground, and the two guide columns are respectively located on the left and right sides of the aforementioned track. The lifting motor is located at the top of the two guide columns, and its output shaft is connected to one end of the lifting screw via a reducer. The sliding plate is slidably mounted on the two guide columns, and a nut that mates with the lifting screw is fixedly mounted on the sliding plate. Rotating the lifting screw can move the nut and the sliding plate up and down along the two guide columns. Lifting and limiting short shafts are provided on both the left and right side walls of the material handling trolley 81. Both lifting arms are fixed to the sliding plate, and the front ends of both lifting arms have U-shaped grooves that mate with the lifting short shafts on the side walls of the material handling trolley 81. A pushing structure is also provided on the lifting arms or the sliding plate. When the material handling trolley 81 is lifted, it pushes the trolley 81 forward, causing it to tilt forward around the lifting short shafts and empty the material inside. The pushing structure can be a cylinder, hydraulic cylinder, or a linkage structure driven by a motor. The short shaft is used to prevent the material handling trolley 81 from tipping over. It can be used in conjunction with a blocking structure set on the lifting arm or sliding plate. The blocking structure can be a blocking block, a blocking linkage, etc.

[0078] During the actual loading process, the material transport trolley 81 is first filled with material and moves along the track to a position slightly forward below the trolley lifting component 82. The lifting motor starts and drives the lifting screw, which in turn lowers the sliding plate. The sliding plate then lowers the two lifting arms. After the lifting arms are in position, the material transport trolley 81 moves towards the trolley lifting component 82 until it reaches the predetermined position, where the lifting short shaft is directly above the U-shaped groove. The lifting motor starts and drives the lifting screw, which in turn raises the sliding plate. The sliding plate then raises the two lifting arms. As the two lifting arms rise, the lifting short shaft engages with the U-shaped groove, and the two lifting arms then raise the material transport trolley 81. Once it reaches the appropriate height, the jacking structure pushes the material transport trolley 81 forward around the lifting short shaft, tilting it to empty the material from the trolley 81.

[0079] like Figure 1 and Figure 12 As shown, the aforementioned single-screw extrusion device for sensitive materials also includes a forming material collection device 90, used to collect and organize the extruded material. Generally, the extrusion die has multiple forming holes, allowing multiple formed materials to be extruded at once. In this embodiment, the forming material collection device 90 includes a belt conveyor 91 and a material distribution device 92. One end of the belt conveyor 91 is located below the die outlet, and the other end is located above the material distribution device 92. The belt conveyor 91 uses an adjustable conveyor belt in terms of height and length. After being processed from the die outlet, the material is spread evenly on the conveyor belt and transported to the material distribution device 92. The material distribution device 92 includes a telescopic support 921 and a chute 922. The upper end of the chute 922 is connected to the top of the telescopic support 921, and the lower end of the chute 922 extends away from the telescopic support 921. Multiple chute 922s are evenly distributed along the circumference of the telescopic support 921. The number of grooves 922 corresponds to the number of forming holes in the mold, that is, the number of grooves 922 is greater than or equal to the number of forming holes in the mold.

[0080] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A single-screw extrusion apparatus for single-base, double-base, and multi-base pharmaceutical products, characterized in that, include: A screw shaft (10) includes a shaft body (11), a sealing end cap (12), and a cooling water pipe (13). A spiral blade is provided on the outer wall of one end of the shaft body (11), and the other end of the shaft body (11) is a smooth shaft structure. A shaft inlet (14) and a shaft outlet (15) are provided on the smooth shaft structure at the other end of the shaft body (11). A cooling hole (16) is provided at the end of the shaft body (11) with the spiral blade along the central axis of the shaft body (11). The cooling hole (16) and the shaft outlet (13) are connected. 15) Connected, the cooling water pipe (13) is arranged in the cooling hole (16) along the central axis of the shaft (11), one end of the cooling water pipe (13) is fixedly connected to the shaft (11), and the end of the cooling water pipe (13) connected to the shaft (11) is connected to the shaft inlet (14), the sealing end cap (12) is arranged at the opening of the cooling hole (16), and the sealing end cap (12) is sealed to the shaft (11), and the other end of the cooling water pipe (13) is spaced apart from the sealing end cap (12); A rotating water jacket (20) is mounted on a shaft (11), and the water inlet of the rotating water jacket (20) is connected to the water inlet (14) of the shaft, and the water outlet of the rotating water jacket (20) is connected to the water outlet (15) of the shaft. Screw shaft fixing seat (30), the screw shaft fixing seat (30) is fitted on one end of the optical shaft structure of the shaft body (11), and the screw shaft fixing seat (30) and the shaft body (11) are rotatably connected; A screw cavity housing (40) is fitted onto the outer end of the helical blade of the shaft body (11). One end of the screw cavity housing (40) is fixedly connected to the screw shaft fixing seat (30). A pressure relief port (41) is provided on the screw cavity housing (40). The pressure relief port (41) is located at the end of the screw cavity housing (40) near the screw shaft fixing seat (30). and a housing cooling structure (45), which covers the outside of the screw cavity housing (40) and is used to cool the screw cavity housing (40).

2. The single-screw extrusion equipment for single-base, double-base, and multi-base drugs according to claim 1, characterized in that, The single-screw extrusion device for sensitive materials also includes a gasket (44), which is disposed between the screw cavity housing (40) and the spiral blades disposed on the outer wall of the shaft (11).

3. The single-screw extrusion equipment for single-base, double-base, and multi-base drugs according to claim 1, characterized in that, The screw cavity housing (40) includes a feeding section (42) and a cooling section (43). One end of the feeding section (42) is fixedly connected to the screw shaft fixing seat (30), and the other end of the feeding section (42) is fixedly connected to the cooling section (43). The housing cooling structure (45) covers the outside of the cooling section (43).

4. The single-screw extrusion equipment for single-base, double-base, and multi-base drugs according to claim 1, characterized in that, The single-screw extrusion device for sensitive materials also includes a pressure sensor (61) and a temperature sensor (62). The pressure sensor (61) and the temperature sensor (62) are both located at the end of the cooling section (43) away from the feeding section (42), and are used to measure the pressure and temperature of the extruded material in the screw cavity housing (40) in real time.

5. A single-screw extrusion apparatus for single-base, double-base, and multi-base drugs according to claim 1, characterized in that, The single-screw extrusion device for sensitive materials also includes a die fixing component (50), which includes a die mounting base (51) and a connecting part (52). The die mounting base (51) is located at the end of the screw cavity housing (40) away from the screw shaft fixing base (30). The connecting part (52) is located at the connection between the die mounting base (51) and the screw cavity housing (40), and the connecting part (52) is used to connect the die mounting base (51) and the screw cavity housing (40) together. The die mounting base (51) has a die mounting hole (511) adapted to the corresponding die. A safety ring (512) for blocking the corresponding die is provided on the hole wall of the die mounting hole (511).

6. The single-screw extrusion equipment for single-base, double-base, and multi-base drugs according to claim 1, characterized in that, The screw shaft fixing seat (30) includes a fixing seat body (31), a thrust bearing (32), and a copper sleeve (33). The fixing seat body (31) is disposed on the optical axis section of the shaft (11). The copper sleeve (33) is installed inside the fixing seat body (31) and is located between the inner wall of the fixing seat body (31) and the outer wall of the shaft (11). The optical axis section of the shaft (11) is provided with a shaft platform. One end of the thrust bearing (32) acts on the shaft platform, and the other end of the thrust bearing (32) acts on the inner wall of the fixing seat body (31) to provide a force along the axial direction of the shaft (11) to the shaft (11).

7. A single-screw extrusion apparatus for single-base, double-base, and multi-base drugs according to claim 1, characterized in that, The single-screw extrusion device for sensitive materials also includes a drive motor (63), a reducer (64), a torque sensor (65), and a safety coupling (66). The drive motor (63) is installed at the input end of the reducer (64). The output shaft of the drive motor (63) is connected to the input end of the reducer (64). The output end of the reducer (64) is connected to one end of the torque sensor (65) via a short shaft. The other end of the torque sensor (65) is connected to one end of the safety coupling (66) via a short shaft. The other end of the safety coupling (66) is connected to one end of the screw shaft (10).

8. A single-screw extrusion apparatus for single-base, double-base, and multi-base drugs according to claim 1, characterized in that, The single-screw extrusion device for sensitive materials also includes a double-tapered screw feeding device (70), which includes a screw drive component (71), a synchronous conveying double screw (72), a double screw cavity (73), a feed funnel (74), and a screw cavity outlet (75). The screw drive component (71) is connected to the synchronous conveying double screw (72) and is used to drive the synchronous conveying double screw (72) to rotate. The threaded conveying section of the synchronous conveying double screw (72) is located inside the double screw cavity (73). The feed funnel (74) is located above the double screw cavity (73). The screw cavity outlet (75) is located in the axial direction of the synchronous conveying double screw (72). The screw cavity outlet (75) is connected to the feed port on the screw cavity housing (40).

9. A single-screw extrusion apparatus for single-base, double-base, and multi-base drugs according to claim 1, characterized in that, The sensitive material single screw extrusion device also includes a feeding device (80), which includes a material conveying trolley (81) and a trolley lifting component (82). The trolley lifting component (82) is located on one side of the double cone screw feeding device (70), and the trolley lifting component (82) is used to grab the material conveying trolley (81) and pour the material in the material conveying trolley (81) into the feed funnel (74).

10. A single-screw extrusion apparatus for single-base, double-base, and multi-base drugs according to claim 1, characterized in that, The single-screw extrusion device for sensitive materials also includes a molding material collection device (90), which includes a belt conveyor (91) and a material distribution device (92). One end of the belt conveyor (91) is located below the mold outlet, and the other end of the belt conveyor (91) is located above the material distribution device (92). The material distribution device (92) includes a telescopic bracket (921) and a chute (922). The upper end of the chute (922) is connected to the top of the telescopic bracket (921), and the lower end of the chute (922) extends away from the telescopic bracket (921). There are multiple chute (922), and the multiple chute (922) are evenly distributed along the circumference of the telescopic bracket (921).

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