A molding die for the shell of a dry powder inhaler with a strength detection function

Abstract

The present invention discloses a forming mold for the outer shell of a dry powder inhaler with a strength detection function, which relates to the technical field of plastic molding. It includes a control system, a feeding system, a screw conveyor system and a frame. A melting cylinder is installed on the frame, a forming component is installed below the melting cylinder, a detection component is installed on one side of the forming component, a driving motor is installed in the melting cylinder, a feeding pipe is connected to the upper end of the melting cylinder, and a discharge pipe is connected to the lower end of the melting cylinder. A coil A is arranged outside the sleeve. The feeding pipe is connected to the feeding system, and the discharge pipe, the screw conveyor system and the forming component are connected in series through pipelines; a spiral cylinder and a conical tower plate are installed in the melting cylinder, a screen plate B is installed outside the conical tower plate, a spiral fin is arranged outside the cylinder, and a coil B and a permanent magnet are installed inside the cylinder; the conical tower plate realizes the vibration and dispersion of plastic particles through the cooperation of the coil B and the permanent magnet, and the spiral fin and the coil A cooperate to heat and convey the plastic particles.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic molding, and specifically relates to a mold for forming a dry powder inhaler shell with a strength detection function. Background Art

[0002] The shell of a dry powder inhaler is a container for a penetration component and a nozzle for accessing the dry powder in a nearly sealed chamber. This shell not only protects the internal components but also ensures that the dry powder can be effectively inhaled by the patient through the nozzle and the penetration component. The design of the dry powder inhaler aims to improve the drug delivery efficiency and ensure that the drug micropowder is inhaled into the lungs in the form of an aerosol under the action of the inhalation airflow, thereby achieving precise drug delivery and efficient utilization.

[0003] The shell of the dry powder inhaler is made by an injection molding process. Melted plastic particles are introduced between the upper mold base and the lower mold base, and then cooled and formed. The existing molds for forming the inhaler shell mainly have the following problems: (1) The plastic particles are prone to agglomeration and accumulation, resulting in uneven heating of the plastic particles. (2) The plastic particles are not preheated in advance, which takes a long time to heat the plastic particles and reduces the injection molding efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a mold for forming a dry powder inhaler shell with a strength detection function to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A mold for forming a dry powder inhaler shell with a strength detection function, including a control system, a feeding system, and a screw conveyor system, including a frame. A melting cylinder is installed on the frame. A forming component is installed below the melting cylinder. A detection component is installed on one side of the forming component. A sleeve is sleeved inside the melting cylinder. A motor base is installed above the melting cylinder. A driving motor is installed on the motor base. The upper end of the melting cylinder is connected to a feeding pipe. The lower end of the melting cylinder is connected to a discharging pipe. A coil A is arranged outside the sleeve. The coil A is electrically connected to the control system. The feeding pipe is connected to the feeding system. The discharging pipe is connected to the inlet of the screw conveyor system. The outlet of the screw conveyor system is connected to the forming component through a pipeline. The forming component injects and forms the inhaler shell. The detection component performs strength detection on the formed inhaler shell.

[0006] The melting cylinder is installed on the frame. A fixed shaft is vertically arranged inside the melting cylinder. A transmission cylinder is sleeved loosely on the upper side of the fixed shaft. The upper end of the transmission cylinder penetrates out of the melting cylinder and is connected to the output end of the driving motor. A sieve plate A is installed on the transmission cylinder. A spiral cylinder is sleeved on the lower side of the fixed shaft. The fixed shaft and the spiral cylinder are connected by spline sliding. The transmission cylinder and the spiral cylinder are connected by a telescopic plate. A cross bar is arranged on the upper side of the spiral cylinder, and a cylinder is arranged on the lower side of the spiral cylinder. A conical tower plate is installed on the outer side of the cross bar, and a sieve plate B is installed on the outer side of the conical tower plate. A spiral blade is arranged on the outer side of the cylinder, and a coil B and a permanent magnet are installed inside the cylinder; The sieve plate A and the sieve plate B screen the plastic particles. The conical tower plate realizes the vibration and dispersion of the plastic particles through the cooperation of the coil B and the permanent magnet. The spiral blade and the coil A cooperate to heat the plastic particles and then convey them.

[0007] The coil A is located on the lower side of the sleeve. The coil A is located between the sleeve and the melting cylinder. The spiral blade is distributed in a spiral shape. A plurality of metal sheets are arranged on the spiral blade. The plurality of metal sheets are distributed along the spiral line of the spiral blade. The plurality of metal sheets are all located in the magnetic field of the coil A.

[0008] The longitudinal section of the conical tower plate is in a "V" shape. A plurality of preheating plates are arranged on the upper side of the conical tower plate, and an empty cylinder is arranged on the lower side of the conical tower plate. An annular groove is arranged on the empty cylinder opposite to the cross bar. A plurality of the cross bars are arranged. The plurality of cross bars are inserted into the annular groove. The plurality of preheating plates are electrically connected to the control system. After the preheating plates are electrified, resistance heat is generated and the heat is transmitted to the plastic particles to realize the preheating treatment of the plastic particles. When the spiral cylinder drives the cross bar to rotate, the cross bar slides in the annular groove, and the cross bar cannot drive the empty cylinder to rotate through the annular groove. When the spiral cylinder drives the cross bar to vibrate up and down, the cross bar drives the empty cylinder and the conical tower plate to vibrate up and down through the annular groove, and the conical tower plate drives the sieve plate B to vibrate up and down.

[0009] A sealing plate is arranged inside the sieve plate A. The sealing plate is slidably connected to the transmission cylinder. The sealing plate seals the gap between the sieve plate A and the transmission cylinder by sliding, so that the plastic particles cannot fall through the gap between the sieve plate A and the transmission cylinder. The inside of the sieve plate B is installed on the conical tower plate. Sieve meshes are arranged on both the sieve plate A and the sieve plate B. The aperture of the sieve mesh on the sieve plate A is larger than the aperture of the sieve mesh on the sieve plate B. Sliding shafts are arranged on the outer sides of the sieve plate A and the sieve plate B. Limiting grooves are arranged on the inner wall of the sleeve opposite to the sliding shafts. The sliding shafts slide in the limiting grooves, and the range of the up and down vibration of the sieve plate A and the sieve plate B is limited by the sliding shafts and the limiting grooves;

[0010] One end of the middle part of the sieve plate A and the middle part of the conical tower plate, which are opposite to each other, are respectively provided with first magnets with different magnetic polarities. When the conical tower plate is driven to vibrate up and down by the coil B, the first magnet on the sieve plate A attracts the first magnet on the conical tower plate, and the sieve plate A vibrates up and down under the attraction force.

[0011] The coil B is located above the permanent magnet. Both ends of the coil B are electrically connected to the control system. A cylinder is provided in the middle of the coil B. The cylinder is installed on a fixed shaft. The outer side of the permanent magnet is installed on a cylinder through a bearing. The middle of the permanent magnet is slidably installed on the fixed shaft. The cylinder is made of a magnetic shielding material, and the cylinder separates the magnetic fields of the coil A and the coil B. The wire connected to the coil B passes through the middle of the fixed shaft and is connected to the control system.

[0012] The forming assembly includes an upper die base and a lower die base. The upper die base is located above the lower die base. Grooves and protrusions adapted to the inhaler housing are respectively provided on the opposite sides of the upper die base and the lower die base. The groove is communicated with a feed port. The feed ports are respectively connected to the outlets of a screw conveyor system through pipes. The upper die base is connected to a lifting electric cylinder. The lifting electric cylinder is installed on a frame. Spiral channels are provided on the opposite sides of the upper die base and the lower die base. A plurality of refrigeration plates are installed in each spiral channel. The spiral channels are distributed in a planar thread to increase the refrigeration area and improve the refrigeration effect. The inlet of each spiral channel is connected in series with a vacuum pump and a circulation tank through a pipe. A coolant is stored in the circulation tank. The outlet of each spiral channel is connected to the circulation tank through a pipe. The vacuum pump and the circulation tank are installed on the frame. A constant pressure valve is installed in the circulation tank. Solenoid valves are installed in the pipes connected to the circulation tank. The constant pressure valve keeps the pressure in the circulation tank constant to ensure the stable delivery of the coolant in the circulation tank.

[0013] The sleeve is made of a heat-insulating material. A plurality of thermopower plates A are installed on the inner wall of the lower side of the sleeve. A plurality of thermopower plates B are installed on the inner wall of the circulation tank. The thermopower plates A and the thermopower plates B correspond one by one. A magnetic shielding plate is provided on one side of the thermopower plate A. The magnetic shielding plate separates the magnetic field of the coil A so that the magnetic field of the coil A cannot affect the thermopower plate A. Two different materials of semiconductors and metal plates are provided on the other side of the thermopower plate A, on the thermopower plate B, and on the refrigeration plate. One ends of the two different materials of semiconductors are connected to the metal plates. The two semiconductors on the thermopower plate A and the two semiconductors on the thermopower plate B are connected by a wire. One of the wires is connected to the control system. The two semiconductors on the refrigeration plate are connected to the control system by a wire.

[0014] The telescopic plate is of a telescopic structure. The transmission cylinder drives the spiral cylinder to rotate through the telescopic plate. When the telescopic plate vibrates up and down on the spiral cylinder, it stretches and contracts along with the spiral cylinder to achieve stable power transmission between the transmission cylinder and the spiral cylinder.

[0015] The detection assembly is a detection electric cylinder and a pressure sensor. The detection electric cylinder is installed on the frame. The pressure sensor is arranged inside the detection electric cylinder;

[0016] A moving plate is arranged on the lower side of the lower die holder. The moving plate is slidably mounted on the frame through a guide rail. The guide rail is mounted on the frame. The moving plate is connected to the telescopic rod of a transverse electric cylinder. The transverse electric cylinder is mounted on the frame. A control panel is mounted on the frame. The control system is arranged inside the control panel. Solenoid valves and flow sensors are installed in both the feed pipe and the discharge pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The plastic particles are subjected to vibration and dispersion treatment, making the plastic particles heat more evenly. By continuously generating a positive magnetic field and a reverse magnetic field through coil B, sieve plate A and sieve plate B generate up-and-down vibrations to disperse the plastic particles, so that the dispersed plastic particles can be conveyed downward faster, preventing blockage. Moreover, the dispersed plastic particles heat more evenly. The frequencies of the up-and-down vibrations of sieve plate A and sieve plate B driving the plastic particles are directly adjusted by the control system, which is convenient and fast. The frequencies of the up-and-down vibrations are determined by the parameters of the alternating current introduced into coil B. The greater the frequency of the alternating current, the faster the spiral cylinder drives sieve plate A, sieve plate B and the spiral blades to vibrate up and down.

[0019] 2. The plastic can be secondarily screened and preheated, reducing the later heating time of the plastic particles and improving the forming efficiency. After the plastic particles pass through sieve plate A, they are preheated through a preheating plate to increase the temperature of the plastic particles. Then, after the plastic particles are filtered by sieve plate B, they fall on the spiral blades. The metal sheets on the spiral blades rotate following the driving motor. The metal sheets cut the magnetic induction lines in the magnetic field of coil A, and the metal sheets will generate heat. While the spiral blades convey the plastic particles downward, they are heated through the metal sheets to melt the plastic particles. The melted plastic particles are conveyed from the discharge pipe to the screw conveyor system and quantitatively conveyed into the upper die holder and the lower die holder through the screw conveyor system, which can improve the forming efficiency of the inhaler shell.

[0020] 3. Recover the heat generated during the melting of the plastic particles, reducing energy consumption. The plastic particles conduct heat to the sleeve, and the temperature of thermopile plate A on the sleeve rises. While thermopile plate B is located in the circulation box, the temperature of thermopile plate A is greater than that of thermopile plate B. An electric current is generated between thermopile plate A and thermopile plate B through the Seebeck effect and transmitted to the control system. After rectification and voltage transformation and other processes by the control system, it is used for cooling the cooling plate, reducing the energy consumption of the forming die. Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the present invention;

[0022] Figure 2 is Figure 1 the installation structural schematic diagram of the melting cylinder and its internal structure and the driving motor in

[0023] Figure 3 is Figure 2 a sectional view of;

[0024] Figure 4 is Figure 3 an enlarged partial view of area A in;

[0025] Figure 5 is Figure 3 a perspective view after removing the melting cylinder, feed pipe, motor base, discharge pipe, etc.;

[0026] Figure 6 is Figure 5 a structural schematic diagram after removing the sleeve, coil A, drive motor, transmission cylinder, etc.;

[0027] Figure 7 is Figure 6 a front view of;

[0028] Figure 8 is a structural schematic diagram of the interior of the circulation tank;

[0029] Figure 9 is a sectional view of the back side of the upper die holder or the lower die holder (the upper side of the upper die holder and the lower side of the lower die holder are the same as those shown in the figure, and the arrow direction indicates the coolant flow direction).

[0030] In the figure: 1, control panel; 11, frame; 12, melting cylinder; 121, sleeve; 122, feed pipe; 123, discharge pipe; 124, temperature difference plate A; 13, coil A; 2, drive motor; 201, fixed shaft; 202, transmission cylinder; 203, telescopic plate; 21, spiral cylinder; 211, cross bar; 212, cylinder; 22, sieve plate A; 221, sieve plate B; 222, sliding shaft; 223, limiting groove; 23, conical tray; 231, preheating plate; 232, empty cylinder; 233, first magnet; 24, spiral fin; 241, metal sheet; 25, coil B; 26, permanent magnet; 3, upper die holder; 31, lower die holder; 32, lifting electric cylinder; 33, spiral flow channel; 34, refrigeration plate; 35, circulation tank; 36, temperature difference plate B; 4, detection electric cylinder; 41, guide rail; 42, transverse electric cylinder. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment: As Figures 1-9As shown in the figure, the present invention provides a technical solution for a mold for forming the outer shell of a dry powder inhaler with a strength detection function, including a control system, a feeding system (not shown in the figure), a screw conveyor system (not shown in the figure), and a frame 11. A melting cylinder 12 is installed on the frame 11. A forming assembly is installed below the melting cylinder 12, and a detection assembly is installed on one side of the forming assembly. A sleeve 121 is sleeved inside the melting cylinder 12. A motor base is installed above the melting cylinder 12, and a driving motor 2 is installed on the motor base. The upper end of the melting cylinder 12 is connected to a feeding pipe 122, and the lower end of the melting cylinder 12 is connected to a discharging pipe 123. A coil A 13 is arranged outside the sleeve 121, and the coil A 13 is electrically connected to the control system. The feeding pipe 122 is connected to the feeding system, and the discharging pipe 123 is connected to the inlet of the screw conveyor system. The outlet of the screw conveyor system is connected to the forming assembly through a pipeline; the forming assembly injects and forms the outer shell of the inhaler, and the detection assembly performs strength detection on the formed outer shell of the inhaler. The detection assembly is a detection electric cylinder 4 and a pressure sensor. The detection electric cylinder 4 is installed on the frame 11, and the pressure sensor is arranged inside the detection electric cylinder 4. The feeding system and the screw conveyor system are both prior arts.

[0033] The melting cylinder 12 is installed on the frame 11. A fixed shaft 201 is vertically arranged inside the melting cylinder 12. A transmission cylinder 202 is sleeved loosely on the upper side of the fixed shaft 201. The upper end of the transmission cylinder 202 passes through the melting cylinder 12 and is connected to the output end of the driving motor 2. A sieve plate A 22 is installed on the transmission cylinder 202. A spiral cylinder 21 is sleeved on the lower side of the fixed shaft 201. The fixed shaft 201 and the spiral cylinder 21 are connected by spline sliding. The transmission cylinder 202 and the spiral cylinder 21 are connected by a telescopic plate 203. The telescopic plate 203 is a telescopic structure. The transmission cylinder 202 drives the spiral cylinder 21 to rotate through the telescopic plate 203. When the telescopic plate 203 vibrates up and down along with the spiral cylinder 21, it stretches and contracts along with the spiral cylinder 21 to achieve stable power transmission between the transmission cylinder 202 and the spiral cylinder 21. A cross bar 211 is arranged on the upper side of the spiral cylinder 21, and a cylinder 212 is arranged on the lower side of the spiral cylinder 21. A conical tower plate 23 is installed outside the cross bar 211, and a sieve plate B 221 is installed outside the conical tower plate 23. A spiral blade 24 is arranged outside the cylinder 212, and a coil B 25 and a permanent magnet 26 are installed inside the cylinder 212; the sieve plate A 22 and the sieve plate B 221 screen plastic particles. The conical tower plate 23 realizes the vibration and dispersion of plastic particles through the cooperation of the coil B 25 and the permanent magnet 26. The spiral blade 24 and the coil A 13 cooperate to heat and convey plastic particles.

[0034] The coil A 13 is located on the lower side of the sleeve 121. The coil A 13 is located between the sleeve 121 and the melting cylinder 12. The spiral blade 24 is distributed in a spiral shape. A plurality of metal sheets 241 are arranged on the spiral blade 24. The plurality of metal sheets 241 are distributed along the spiral line of the spiral blade 24. The plurality of metal sheets 241 are all located in the magnetic field of the coil A 13.

[0035] The longitudinal section of the conical tray 23 is in a "V" shape. A number of preheating plates 231 are arranged on the upper side of the conical tray 23, and an empty cylinder 232 is arranged on the lower side of the conical tray 23. An annular groove is arranged on the empty cylinder 232 opposite to the cross bar 211. There are multiple cross bars 211, and the multiple cross bars 211 are inserted into the annular groove. The number of preheating plates 231 is electrically connected to the control system. After the preheating plates 231 are powered on, resistance heat will be generated and the heat will be transmitted to the plastic particles to achieve the preheating treatment of the plastic particles. When the spiral cylinder 21 drives the cross bar 211 to rotate, the cross bar 211 slides in the annular groove, and the cross bar 211 cannot drive the empty cylinder 232 to rotate through the annular groove. When the spiral cylinder 21 drives the cross bar 211 to vibrate up and down, the cross bar 211 drives the empty cylinder 232 and the conical tray 23 to vibrate up and down through the annular groove, and the conical tray 23 drives the sieve plate B221 to vibrate up and down.

[0036] A sealing plate is arranged inside the sieve plate A22. The sealing plate is slidably connected to the transmission cylinder 202. The sealing plate performs sliding sealing between the sieve plate A22 and the transmission cylinder 202, so that the plastic particles cannot fall through the gap between the sieve plate A22 and the transmission cylinder 202. The inside of the sieve plate B221 is installed on the conical tray 23. Sieve meshes are arranged on both the sieve plate A22 and the sieve plate B221. The aperture of the sieve mesh on the sieve plate A22 is larger than the aperture of the sieve mesh on the sieve plate B221. Sliding shafts 222 are arranged on the outer sides of both the sieve plate A22 and the sieve plate B221. Limiting grooves 223 are arranged on the inner walls of the sleeves 121 opposite to the sliding shafts 222. The sliding shafts 222 slide in the limiting grooves 223. The range of the up and down vibration of the sieve plate A22 and the sieve plate B221 is limited by the sliding shafts 222 and the limiting grooves 223; opposite ends of the middle parts of the sieve plate A22 and the conical tray 23 are respectively provided with first magnets 233 with different magnetic polarities. When the conical tray 23 is driven to vibrate up and down by the coil B25, the first magnet 233 on the sieve plate A22 attracts the first magnet 233 on the conical tray 23, and the sieve plate A22 vibrates up and down under the action of the attraction force.

[0037] The coil B25 is located above the permanent magnet 26. Both ends of the coil B25 are electrically connected to the control system. A column body is arranged in the middle of the coil B25. The column body is installed on the fixed shaft 201. The outer side of the permanent magnet 26 is installed on the cylinder 212 through a bearing. The middle part of the permanent magnet 26 is slidably installed on the fixed shaft 201. The cylinder 212 is made of a magnetic shielding material, and the cylinder 212 separates the magnetic fields of the coil A13 and the coil B25.

[0038] The forming assembly includes an upper die base 3 and a lower die base 31. The upper die base 3 is located above the lower die base 31. On the opposite sides of the upper die base 3 and the lower die base 31, there are respectively arranged a groove and a protrusion adapted to the inhaler housing. The groove is communicated with a feed port, and the feed ports are respectively connected to the outlets of the screw conveyor system through pipes. The upper die base 3 is connected to a lifting electric cylinder 32, and the lifting electric cylinder 32 is installed on the frame 11. On the opposite sides of the upper die base 3 and the lower die base 31, there are spiral channels 33. A number of refrigeration plates 34 are installed in each spiral channel 33. The spiral channels 33 are distributed in a planar thread pattern to increase the refrigeration area and improve the refrigeration effect. The inlet of each spiral channel 33 is connected in series with a vacuum pump and a circulation tank 35 through a pipe. The circulation tank 35 stores coolant. The outlet of each spiral channel 33 is connected to the circulation tank 35 through a pipe. The vacuum pump and the circulation tank 35 are installed on the frame 11. A constant pressure valve (not shown in the figure) is installed in the circulation tank 35, and solenoid valves (not shown in the figure) are installed in the pipes connected to the circulation tank 35. The constant pressure valve keeps the pressure in the circulation tank 35 constant to ensure the stable delivery of the coolant in the circulation tank 35. A moving plate is arranged on the lower side of the lower die base 31. The moving plate is slidably installed on the frame 11 through a guide rail 41, and the guide rail 41 is installed on the frame 11. The moving plate is connected to the telescopic rod of a transverse electric cylinder 42, and the transverse electric cylinder 42 is installed on the frame 11. A control panel 1 is installed on the frame 11, and the control system is arranged in the control panel 1. Solenoid valves and flow sensors are installed in both the feed pipe 122 and the discharge pipe 123.

[0039] The sleeve 121 is made of heat-insulating material. A number of thermopiles A124 are installed on the inner wall of the lower side of the sleeve 121. A number of thermopiles B36 are installed on the inner wall of the circulation tank 35. The thermopiles A124 and the thermopiles B36 are in one-to-one correspondence. A magnetic shielding plate is arranged on one side of the thermopile A124 to separate the magnetic field of the coil A13, so that the magnetic field of the coil A13 cannot affect the thermopile A124. On the other side of the thermopile A124, on the thermopile B36 and on the refrigeration plate 34, there are two different materials of semiconductors and metal plates. One end of the two different materials of semiconductors is connected to the metal plate. The two semiconductors on the thermopile A124 and the two semiconductors on the thermopile B36 are connected through a wire, and one of the wires is connected to the control system. The two semiconductors on the refrigeration plate 34 are connected to the control system through a wire.

[0040] While the metal sheet 241 on the spiral sheet 24 heats the plastic particles, the plastic particles conduct the heat to the sleeve 121. The temperature of the thermopile A 124 on the sleeve 121 rises. Since the thermopile B 36 is located in the circulation box 35, the temperature of the thermopile A 124 is higher than that of the thermopile B 36. A current is generated between the thermopile A 124 and the thermopile B 36 through the Seebeck effect and transmitted to the control system. After processes such as rectification and voltage transformation by the control system, it is used to cool the cooling plate 34. When the control system detects that the current generated through the Seebeck effect is small, the control system directly powers the two semiconductors on the cooling plate 34.

[0041] The frequency at which the spiral cylinder 21 drives the sieve plate A 22, the sieve plate B 221, and the spiral sheet 24 to vibrate up and down is determined by the parameters of the alternating current passed through the coil B 25. The greater the frequency of the alternating current, the faster the spiral cylinder 21 drives the sieve plate A 22, the sieve plate B 221, and the spiral sheet 24 to vibrate up and down.

[0042] Working principle: The operator presses the start button on the control panel 1, and the control system opens the solenoid valves in the feed pipe 122 and the discharge pipe 123. The feeding system transports the plastic particles through the feed pipe 122 into the sleeve 121. The flow sensor in the feed pipe 122 feeds back the data to the control system, and the control system controls the preheating plate 231 to be connected to the circuit, the drive motor 2 to rotate, and the coil A 13 to be connected to the circuit. After the preheating plate 231 is connected to the circuit, it generates heat. After the coil A 13 is connected to the circuit, a magnetic field is generated at both ends.

[0043] The plastic particles fall downward from the feed pipe 122 onto the sieve of the sieve plate A 22. The smaller particles pass through the sieve plate A 22 and fall onto the preheating plate 231 of the conical tray 23. The preheating plate 231 heats the smaller particles, while the larger particles cannot pass through the sieve of the sieve plate A 22. The heated smaller plastic particles fall onto the sieve of the sieve plate B 221 and, after being filtered by the sieve plate B 221, fall onto the spiral sheet 24. The drive motor 2 drives the transmission cylinder 202 to rotate. The transmission cylinder 202 drives the spiral cylinder 21 and the spiral sheet 24 to rotate through the telescopic plate 203. The metal sheet 241 on the spiral sheet 24 rotates accordingly. The metal sheet 241 cuts the magnetic induction lines in the magnetic field of the coil A 13, and the metal sheet 241 generates heat. While the spiral sheet 24 conveys the plastic particles downward, it heats the plastic particles through the metal sheet 241, melting the plastic particles. The melted plastic particles are transported from the discharge pipe 123 to the screw conveyor system and quantitatively transported into the upper die holder 3 and the lower die holder 31 through the screw conveyor system.

[0044] During the rotation of the spiral cylinder 21 driven by the drive motor 2, the control system connects the coil B25 to alternating current, causing the magnetic field at both ends of the coil B25 to change alternately. When the coil B25 is energized with positive-phase alternating current and generates a positive magnetic field, the positive magnetic field repels the magnetic field generated by the permanent magnet 26. Under the action of the repulsive force, the permanent magnet 26 drives the cylinder 212 to move downward, the cylinder 212 drives the spiral cylinder 21 to move downward, and the spiral cylinder 21 drives the empty cylinder 232 to move downward through the cooperation of the cross bar 211 and the annular groove. The empty cylinder 232 drives the conical tower tray 23 to move downward, and the first magnet 233 on the conical tower tray 23 and the sieve plate B221 on the outside move downward accordingly. The first magnet 233 on the conical tower tray 23 attracts the first magnet 233 on the sieve plate A22. Under the action of the attractive force, the first magnet 233 on the conical tower tray 23 pulls the first magnet 233 on the sieve plate A22 downward, and the first magnet 233 on the sieve plate A22 drives the sieve plate A22 to move downward accordingly, causing the sieve meshes on the sieve plate A22 and the sieve plate B221 and the plastic particles to move downward.

[0045] When the coil B25 is energized with reverse-phase alternating current, a reverse magnetic field is generated at both ends of the coil B25. The reverse magnetic field attracts the magnetic field generated by the permanent magnet 26. Under the action of the attractive force, the permanent magnet 26 drives the cylinder 212 and the spiral cylinder 21 to move upward. The spiral cylinder 21 drives the empty cylinder 232 and the conical tower tray 23 to move upward through the cross bar 211 and the annular groove. The conical tower tray 23 drives the sieve plate B221 to move upward, and the first magnet 233 on the conical tower tray 23 moves upward accordingly. Under the attractive force of the first magnet 233 on the conical tower tray 23, the first magnet 233 on the sieve plate A22 causes the sieve plate A22 to move upward, and the sieve meshes on the sieve plate A22 and the sieve plate B221 drive the plastic particles to move upward.

[0046] By continuously generating positive and reverse magnetic fields in the coil B25, the sieve plate A22 and the sieve plate B221 vibrate up and down to disperse the plastic particles, so that the dispersed plastic particles can be conveyed downward faster, preventing blockage, and the dispersed plastic particles are heated more evenly.

[0047] When the melted plastic particles enter the screw conveyor system from the discharge pipe 123, the flow sensor in the discharge pipe 123 feeds back data to the control system. The control system drives the upper mold base 3 to contact the lower mold base 31 through the lifting electric cylinder 32, realizing the mold closing of the upper mold base 3 and the lower mold base 31, and enabling the upper mold base 3 and the lower mold base 31 to cooperate to achieve the injection molding of the inhaler shell. After the screw conveyor system pressurizes the melted plastic particles, the melted plastic particles are quantitatively transported through the pipeline from the outlet of the screw conveyor system to the feed ports of the upper mold base 3 and the lower mold base 31. After the melted plastic particles enter the upper mold base 3 and the lower mold base 31 through the feed ports, the upper mold base 3 and the lower mold base 31 inject the melted plastic particles into the shell of the inhaler according to the time set in advance by the staff.

[0048] When the upper mold base 3 and the lower mold base 31 inject and mold the plastic particles, the control system opens the solenoid valve in the connecting pipeline of the circulation tank 35, and respectively extracts the coolant in the circulation tank 35 to the spiral flow channels 33 of the upper mold base 3 and the lower mold base 31 through the vacuum pump and the pipeline. The refrigeration plate 34 in the spiral flow channel 33 is the refrigeration end of the Peltier effect. The refrigeration plate 34 further cools the coolant through the Peltier effect, enabling the cooled coolant to flow in the spiral flow channel 33 and then be transported to the circulation tank 35 from the outlet of the spiral flow channel 33 and the pipeline to form a cycle. The spiral flow channel 33 and the refrigeration plate 34 cool the upper mold base 3 and the lower mold base 31 with the cooled coolant, enabling the inhaler shell completed by injection molding between the upper mold base 3 and the lower mold base 31 to be cooled and formed.

[0049] After the injection molding of the inhaler shell, the control system drives the upper mold base 3 to move upward and reset through the lifting electric cylinder 32. Then, the transverse electric cylinder 42 drives the lower mold base 31 to move to the right, making the inhaler shell on the lower mold base 31 located directly below the detection electric cylinder 4. The control system controls the piston rod of the detection electric cylinder 4 to press down the inhaler shell according to the set pressure. The pressure sensor in the detection electric cylinder 4 feeds back the pressure data to the control system. When the data of the pressure sensor is greater than or equal to the set data, it is determined that the strength of the inhaler shell meets the requirements. When the data of the pressure sensor is less than the set data, the inhaler shell is crushed downward by the detection electric cylinder 4, and the control system determines that the strength of the inhaler shell does not meet the requirements. The staff respectively remove the inhaler shells that meet the requirements and those that do not meet the requirements for further processing. The set data is set in advance by the staff through the control panel 1.

[0050] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Accordingly, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A forming mold for the shell of a dry powder inhaler with a strength detection function, comprising a control system, a feeding system, and a screw conveyor system, characterized in that: It includes a frame (11), on which a melting cylinder (12) is installed. Below the melting cylinder (12), a molding component is installed. On one side of the molding component, a detection component is installed. A sleeve (121) is sleeved inside the melting cylinder (12). Above the melting cylinder (12), a motor base is installed, and a driving motor (2) is installed on the motor base. The upper end of the melting cylinder (12) is connected to a feed pipe (122), and the lower end of the melting cylinder (12) is connected to a discharge pipe (123). Outside the sleeve (121), a coil A (13) is arranged. The coil A (13) is electrically connected to a control system. The feed pipe (122) is connected to a feeding system, and the discharge pipe (123) is connected to the inlet of a screw conveyor system. The outlet of the screw conveyor system is connected to the molding component through a pipeline; the molding component injection-molds an inhaler shell, and the detection component performs a strength test on the molded inhaler shell; Inside the melting cylinder (12), a fixed shaft (201) is vertically arranged. A transmission cylinder (202) is sleeved loosely on the upper side of the fixed shaft (201). A sieve plate A (22) is installed on the transmission cylinder (202). A spiral cylinder (21) is sleeved on the lower side of the fixed shaft (201). On the upper side of the spiral cylinder (21), a cross bar (211) is arranged. On the lower side of the spiral cylinder (21), a cylinder (212) is arranged. Outside the cross bar (211), a conical tower tray (23) is installed. Outside the conical tower tray (23), a sieve plate B (221) is installed. Outside the cylinder (212), a spiral blade (24) is arranged. Inside the cylinder (212), a coil B (25) and a permanent magnet (26) are installed. On the upper side of the conical tower tray (23), a number of preheating plates (231) are arranged. The number of the preheating plates (231) is electrically connected to the control system; The melting cylinder (12) is installed on the frame (11). The upper end of the transmission cylinder (202) passes through the melting cylinder (12) and is connected to the output end of the driving motor (2). The fixed shaft (201) and the spiral cylinder (21) are connected by spline sliding. The transmission cylinder (202) and the spiral cylinder (21) are connected by a telescopic plate (203). The sieve plate A (22) and the sieve plate B (221) screen plastic particles. The conical tower tray (23) realizes the vibration and dispersion of plastic particles through the cooperation of the coil B (25) and the permanent magnet (26). The spiral blade (24) and the coil A (13) cooperate to heat and convey plastic particles; The coil A (13) is located on the lower side of the sleeve (121). The coil A (13) is located between the sleeve (121) and the melting cylinder (12). The spiral blade (24) is distributed in a spiral. A number of metal sheets (241) are arranged on the spiral blade (24). The number of the metal sheets (241) is distributed along the spiral of the spiral blade (24). All the number of the metal sheets (241) are located in the magnetic field of the coil A (13); A sealing plate is arranged inside the sieve plate A (22). The sealing plate is slidably connected to the transmission cylinder (202). The sealing plate slidably seals between the sieve plate A (22) and the transmission cylinder (202). The inside of the sieve plate B (221) is mounted on the conical tray (23). Sieve meshes are arranged on both the sieve plate A (22) and the sieve plate B (221). The aperture of the sieve mesh on the sieve plate A (22) is larger than that of the sieve mesh on the sieve plate B (221). Sliding shafts (222) are arranged on the outer sides of both the sieve plate A (22) and the sieve plate B (221). A limiting groove (223) is arranged on the inner wall of the sleeve (121) opposite to the sliding shaft (222). The sliding shaft (222) slides in the limiting groove (223). The up-and-down vibration ranges of the sieve plate A (22) and the sieve plate B (221) are limited by the sliding shaft (222) and the limiting groove (223). One end of the middle part of the sieve plate A (22) and the middle part of the conical tray (23) which face each other are respectively provided with first magnets (233) with different magnetic polarities. The forming assembly includes an upper die base (3) and a lower die base (31). The upper die base (3) is located above the lower die base (31). Grooves and protrusions adapted to the inhaler housing are respectively arranged on one side of the upper die base (3) and the lower die base (31) which face each other. The groove communicates with a feed port. The feed ports are respectively connected to the outlets of the screw conveyor systems through pipelines. The upper die base (3) is connected to a lifting electric cylinder (32). The lifting electric cylinder (32) is mounted on the frame (11). Spiral channels (33) are arranged on the sides of the upper die base (3) and the lower die base (31) which face away from each other. A plurality of refrigeration plates (34) are installed in each spiral channel (33). The spiral channels (33) are distributed in a planar thread. The inlet of each spiral channel (33) is connected in series with a vacuum pump and a circulation tank (35) through a pipeline. A coolant is stored in the circulation tank (35). The outlet of each spiral channel (33) is connected to the circulation tank (35) through a pipeline. The vacuum pump and the circulation tank (35) are mounted on the frame (11). A constant pressure valve is installed in the circulation tank (35). Solenoid valves are installed in the pipelines connected to the circulation tank (35).

2. The forming mold for the outer shell of a dry powder inhaler with a strength detection function according to claim 1, characterized in that: The longitudinal section of the conical tray (23) is in a "V" shape. An empty cylinder (232) is arranged on the lower side of the conical tray (23). An annular groove is arranged on the empty cylinder (232) opposite to the cross bar (211). A plurality of cross bars (211) are arranged. The plurality of cross bars (211) are inserted into the annular groove.

3. A forming mold for the outer shell of a dry powder inhaler with a strength detection function according to claim 2, characterized in that: The coil B (25) is located above the permanent magnet (26). Both ends of the coil B (25) are electrically connected to the control system. A column body is arranged in the middle of the coil B (25). The column body is mounted on the fixed shaft (201). The outer side of the permanent magnet (26) is mounted on the cylinder (212) through a bearing. The middle part of the permanent magnet (26) is slidably mounted on the fixed shaft (201). The cylinder (212) is made of a magnetic shielding material. The cylinder (212) separates the magnetic fields of the coil A (13) and the coil B (25).

4. A forming mold for the outer shell of a dry powder inhaler with a strength detection function according to claim 3, characterized in that: The sleeve (121) is made of heat-insulating material. A number of thermopiles A (124) are installed on the inner wall of the lower side of the sleeve (121). A number of thermopiles B (36) are installed on the inner wall of the circulation tank (35). The thermopiles A (124) and the thermopiles B (36) are in one-to-one correspondence. A magnetic shielding plate is arranged on one side of the thermopile A (124). Two different materials of semiconductors and metal plates are arranged on the other side of the thermopile A (124), on the thermopile B (36), and on the refrigeration plate (34). One end of the two different materials of semiconductors is connected to the metal plate. The two semiconductors on the thermopile A (124) and the two semiconductors on the thermopile B (36) are connected by a wire. One of the wires is connected to the control system. The two semiconductors on the refrigeration plate (34) are connected to the control system by a wire.

5. A molding die for the outer shell of a dry powder inhaler with an intensity detection function according to claim 4, characterized in that: The telescopic plate (203) is of a telescopic structure, and the telescopic plate (203) stretches and contracts following the spiral cylinder (21).

6. The forming mold for the outer shell of a dry powder inhaler with a strength detection function according to claim 5, characterized in that: The detection assembly is a detection electric cylinder (4) and a pressure sensor. The detection electric cylinder (4) is installed on the frame (11), and the pressure sensor is arranged inside the detection electric cylinder (4); A moving plate is arranged on the lower side of the lower die base (31). The moving plate is slidably installed on the frame (11) through a guide rail (41). The guide rail (41) is installed on the frame (11). The moving plate is connected to the telescopic rod of a transverse electric cylinder (42). The transverse electric cylinder (42) is installed on the frame (11). A control panel (1) is installed on the frame (11). The control system is arranged inside the control panel (1). Electromagnetic valves and flow sensors are installed in both the feed pipe (122) and the discharge pipe (123).

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