Hearing aid half eardrum liquid silica gel injection molding machine

Abstract

The invention discloses a liquid silica gel injection molding machine for a hearing aid half eardrum. The liquid silica gel injection molding machine comprises a machine base; the movable plate is arranged above the machine base in parallel; the upper die is fixed on the lower end surface of the movable plate; the injection unit is vertically connected above the movable plate; the plate moving device is installed on the upper end face of the machine base. The lower die is mounted on the upper end surface of the plate moving device; the plate moving device can move and finely adjust the lower mold above the plate moving device in the horizontal direction and can move the lower mold to an external station, and workers can conveniently conduct demolding operation so as to achieve continuous operation; the injection unit can quickly inject liquid silica gel through a central channel, and an exhaust groove in the surface of the lower mold is kept open, so that gas in a mold cavity can be fully exhausted; and then, the lower mold is aligned with the upper mold in the horizontal sliding process, the exhaust groove is completely closed, the injection unit can accurately inject liquid silica gel through the multiple injection cavities, and the forming precision is ensured.

Description

Technical Field

[0001] This invention belongs to the field of injection molding technology, specifically a liquid silicone injection molding machine for hearing aid hemidiaphragms. Background Technology

[0002] As a key component connecting the hearing aid unit to the ear canal, the material and manufacturing precision of the eardrum directly affect wearing comfort and acoustic performance. Currently, traditional injection molding machines all have defects in venting and trapping air. They rely on the tiny venting grooves in the mold itself. For the irregular shape of the hearing aid eardrum, which has deep cavities and blind holes, venting is often incomplete, resulting in air bubbles and defective products. Although some injection molding machines can be connected to vacuum pumps, their vacuum holding capacity at the moment of mold closing is limited. If the air in the mold cavity cannot be completely expelled, the silicone will trap the air in dead corners during rapid filling, resulting in air bubbles in the finished product, which seriously affects the appearance and acoustic sealing.

[0003] In addition, traditional injection molding machines use large-diameter screws or plungers for rapid injection, which results in poor metering accuracy and makes it easy to inject too much or too little. If only micro-injection units are used to ensure accuracy, their injection speed is insufficient, and the material cools down during flow, affecting the mold filling quality.

[0004] Therefore, it is necessary to provide a liquid silicone injection molding machine for hearing aid hemidiaphragms to solve the problems mentioned in the background art. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a liquid silicone injection molding machine for a hearing aid hemidiaphragm, comprising:

[0006] The base has multiple symmetrically distributed optical axes vertically arranged on its upper surface;

[0007] A movable plate is arranged parallel above the base, and the movable plate is slidably connected to each of the optical axes;

[0008] The upper mold is fixed to the lower end face of the movable plate;

[0009] An injection unit is vertically connected above the movable plate, and the lower injection port of the injection unit is connected to the upper mold.

[0010] A plate-shifting device is installed on the upper end face of the machine base;

[0011] The lower mold is installed on the upper end face of the moving plate device. A lifting cylinder is installed on the machine base, and the telescopic end of the lifting cylinder is connected to the movable plate.

[0012] Furthermore, preferably, the plate-shifting device includes:

[0013] A fixed frame is horizontally fixed inside the base, and the surface of the fixed frame is provided with a plurality of parallel first guide rails;

[0014] The L-shaped plate is slidably connected to the first guide rail by a slider. Two second guide rails are symmetrically arranged on the L-shaped plate, and the second guide rails are perpendicular to the first guide rail.

[0015] The base plate is slidably connected to the second guide rail via a slider. Both the fixed frame and the L-shaped plate are rotatably connected to a lead screw. The lower end faces of the L-shaped plate and the base plate are respectively fixed with a first threaded sleeve and a second threaded sleeve that are threadedly engaged with the lead screw.

[0016] Furthermore, as a preferred embodiment, two protective plates are symmetrically arranged on the base, each of the protective plates being vertically fixed to the upper surface of the base, and one of the protective plates having a viewing window;

[0017] The lower mold is configured as two, and the two lower molds are distributed in parallel.

[0018] Furthermore, preferably, the injection unit includes:

[0019] An upper housing has a lower housing fixed to its lower end face, and the lower housing is fixed to the movable plate;

[0020] An injection cylinder is vertically connected inside the lower housing, and a material hole is provided on the outer wall of one end of the injection cylinder.

[0021] An injection seat is fixed inside the lower housing and sealed around the injection cylinder. The injection seat has a first conveying hole and a second conveying hole, both of which are connected to the material hole.

[0022] A screw shaft is rotatably connected inside the syringe. A main shaft seat is fixed in the upper housing. A machine shaft is rotatably connected inside the main shaft seat. One end of the screw shaft extends coaxially into and is connected to the machine shaft.

[0023] The feeder is coaxially fixed to the end of the injection cylinder away from the injection seat, and a needle valve nozzle is sealed to one end of the feeder.

[0024] Furthermore, as a preferred embodiment, a heater is provided inside the lower housing.

[0025] Furthermore, as a preferred embodiment, the feeder has a central channel in the center, and a feed tube is vertically connected in the central channel, with the lower end of the feed tube extending into and connecting to the needle valve nozzle;

[0026] The feeder has a flow-blocking cavity at the upper end of the central channel. A flow-blocking sleeve is slidably connected in the flow-blocking cavity. A valve hole is opened at the lower end of the flow-blocking sleeve. A valve plug that slides and seals with the valve hole is fixed in the flow-blocking cavity below the flow-blocking sleeve.

[0027] The feeder has a fixed sub-cylinder body inside, and multiple injection chambers are distributed around the circumference of the sub-cylinder body. The feeder has multiple side channels, one end of each side channel is connected to the injection chamber, and the other end is connected to the interception chamber.

[0028] The side wall of the intercepting sleeve has multiple side holes.

[0029] Furthermore, as a preferred embodiment, each injection cavity is slidably connected to a piston shaft, and one side of each injection cavity is provided with a one-way row hole, the other end of each one-way row hole being connected to the central channel.

[0030] The lower end of the feeder is equipped with an end seat, and a guide plate is provided inside the end seat; an inner channel communicating with the central channel is opened inside the end seat, and the other end of the inner channel is connected to the needle valve nozzle;

[0031] The guide plate has universal joints distributed around its circumference that are connected to the piston shaft.

[0032] A swashplate is rotatably connected inside the end seat, and the upper inclined surface of the swashplate abuts against the guide plate.

[0033] The swashplate is fitted with a driven gear, and a drive motor is installed inside the lower housing. The output end of the drive motor is driven by the driven gear through a gear meshing.

[0034] Furthermore, as a preferred embodiment, a positioning plate is installed below each of the lower molds, and the lower end face of the positioning plate is fixed to the plate-moving device;

[0035] The four corners of the positioning plate are vertically connected to positioning spindles, and the upper mold is provided with positioning holes that cooperate with the positioning spindles.

[0036] The upper surface of the lower mold is provided with an exhaust groove, and the lower surface of the upper mold is provided with a sealing edge corresponding to the exhaust groove.

[0037] Furthermore, as a preferred embodiment, straight slots are provided at the four corners of the lower mold, and each of the positioning spindles is connected through the straight slots. The lower mold is slidably connected to the positioning plate through the sliding fit between the straight slots and the positioning spindles. When the lower mold is aligned with the center of the positioning plate, the sealing edge and the venting groove form a sealing fit.

[0038] Two of the positioning off-axis located diagonally are rotatably connected to the positioning plate; each of the two positioning off-axis is fixed with a convex shaft, and a guide pin is fixed on the convex shaft;

[0039] Furthermore, two guide grooves are provided in the lower mold, and the guide pin is slidably connected in the guide grooves. The guide grooves are perpendicular to the straight groove holes.

[0040] A gear connecting disc is rotatably connected inside the positioning plate, and fixed teeth are sleeved on the two positioning off-shafts, with the gear connecting disc meshing with the fixed teeth.

[0041] Furthermore, as a preferred embodiment, a positioning spindle is vertically slidably connected inside the upper mold, and a locking hole is provided at a corresponding position on the lower mold.

[0042] Compared with the prior art, the beneficial effects of the present invention are:

[0043] In this invention, a plate-shifting device is installed inside the machine base. On the one hand, the plate-shifting device can make horizontal adjustments to the lower mold above it to ensure that the lower mold can achieve precise sealing and docking with the upper mold above it. On the other hand, there are two lower molds. When one lower mold is in conjunction with the upper mold for injection molding, the other lower mold can be moved to an external work station through the plate-shifting device to facilitate demolding operations or surface air blowing cleaning of the lower mold, thereby achieving continuous operation.

[0044] In addition, the injection unit in this invention can quickly inject liquid silicone through the central channel. At this time, the upper mold and the lower mold are not aligned in the center, and the venting groove on the surface of the lower mold remains open, which is conducive to the full discharge of gas in the mold cavity. After the initial injection is completed, the lower mold is aligned with the upper mold in the horizontal sliding process, and the venting groove is completely closed. At this time, the injection unit switches to multiple injection chambers in the sub-cylinder to inject liquid silicone precisely, ensuring molding accuracy. Compared with the traditional passive venting that relies on the tiny gaps in the mold parting surface, this method has higher venting efficiency and can effectively reduce defects such as bubbles, defects or incomplete filling caused by gas residue. It is especially suitable for hearing aid eardrums with complex structures and deep cavities. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0046] Figure 2 This is a schematic diagram of the injection unit in this invention;

[0047] Figure 3 This is a partial structural cross-sectional view of the injection unit in this invention;

[0048] Figure 4 This is a schematic diagram of the internal structure of the feeder in this invention;

[0049] Figure 5 This is a cross-sectional view of the lower mold in this invention;

[0050] Figure 6 This is a schematic diagram of the cross-sectional structure of the lower mold in this invention;

[0051] Figure 7 This is a schematic diagram of the convex shaft in this invention;

[0052] Figure 8 This is a schematic diagram of the guide groove in the present invention;

[0053] In the diagram: 1. Base; 11. Optical axis; 12. Movable plate; 13. Upper mold; 14. Lower mold; 15. Protective plate; 2. Transfer plate device; 21. Fixing frame; 22. L-shaped plate; 23. Base plate; 24. Lead screw; 3. Injection unit; 31. Upper housing; 32. Lower housing; 33. Injection cylinder; 34. Injection seat; 35. First conveying hole; 36. Second conveying hole; 37. Screw shaft; 38. Main shaft seat; 39. Machine shaft; 310. Needle 4. Valve-type nozzle; 5. Feeder; 6. Central channel; 7. Feed tube; 8. Cut-off sleeve; 9. Valve plug; 10. Side channel; 11. Side hole; 12. Sub-cylinder body; 13. Piston shaft; 24. One-way row hole; 35. End seat; 46. Guide plate; 57. Inner channel; 68. Swashplate; 98. Positioning plate; 10. Positioning spindle; 11. Straight slot hole; 12. Protruding shaft; 13. Guide groove; 14. Gear connecting disc; 15. Positioning spindle; 16. Lock hole. Detailed Implementation

[0054] Please see Figures 1-8 In this embodiment of the invention, a liquid silicone injection molding machine for a hearing aid hemidiaphragm includes:

[0055] The base 1 has multiple symmetrically distributed optical axes 11 vertically arranged on its upper surface, and the lower ends of the optical axes 11 are all fixedly connected to the base 1.

[0056] A movable plate 12 is arranged parallel above the base 1, and the movable plate 12 is slidably connected to each of the optical axes 11;

[0057] The upper mold 13 is fixed to the lower end face of the movable plate 12;

[0058] Injection unit 3 is vertically connected above movable plate 12, and the lower injection port of injection unit 3 is connected to upper mold 13;

[0059] The plate shifting device 2 is installed on the upper end face of the base 1;

[0060] The lower mold 14 is installed on the upper end face of the moving plate device 2. After the lower mold 14 and the upper mold 13 are sealed together, the injection unit 3 can perform injection operations. A lifting cylinder (not shown in the figure) is installed on the machine base 1. The telescopic end of the lifting cylinder is connected to the movable plate 12 so that the lifting cylinder can control the up and down sliding displacement of the movable plate 12, thereby realizing the mold closing or demolding operations of the upper mold 13 and the lower mold 14.

[0061] In this embodiment, the plate-shifting device 2 includes:

[0062] A fixing frame 21 is horizontally fixed inside the base 1, and a plurality of parallel first guide rails are provided on the surface of the fixing frame 21.

[0063] The L-shaped plate 22 is slidably connected to the first guide rail by a slider. Two second guide rails are symmetrically arranged on the L-shaped plate 22, and the second guide rails are perpendicular to the first guide rail.

[0064] The base plate 23 is slidably connected to the second guide rail via a slider. Both the fixed frame 21 and the L-shaped plate 22 are rotatably connected to lead screws 24. The lower end faces of the L-shaped plate 22 and the base plate 23 are respectively fixed with a first threaded sleeve and a second threaded sleeve that are threadedly engaged with the lead screws 24. In this device, the moving plate device 2 can realize the horizontal movement and positioning of the lower mold 14 by sliding the L-shaped plate 22 and the base plate 23 along the first guide rail and the second guide rail, so as to facilitate the precise alignment of the lower mold 14 and the upper mold 13 to achieve mold closing.

[0065] In a preferred embodiment, two protective plates 15 are symmetrically arranged on the base 1, and each of the protective plates 15 is vertically fixed to the upper end face of the base 1. One of the protective plates 15 is provided with a viewing window.

[0066] The lower mold 14 is configured as two, and the two lower molds 14 are distributed in parallel. With this configuration, when one lower mold 14 is injection molding in the machine, the other lower mold 14 is demolded and air-blown cleaned outside the machine, which directly eliminates the waiting time, realizes "zero downtime" auxiliary operation, and greatly improves the injection molding production efficiency of the equipment.

[0067] In this embodiment, the injection unit 3 includes:

[0068] The upper housing 31 has a lower housing 32 fixed to its lower end face, and the lower housing 32 is fixed to the movable plate 12;

[0069] The injection cylinder 33 is vertically connected inside the lower housing 32, and a material hole is opened on the outer wall of one end of the injection cylinder 33;

[0070] The injection seat 34 is fixed inside the lower housing 32 and sealed around the injection cylinder 33. The injection seat 34 has a first delivery hole 35 and a second delivery hole 36. Both the first delivery hole 35 and the second delivery hole 36 are connected to the material hole. Different material tubes are connected to the outside of the first delivery hole 35 and the second delivery hole 36, so that single-component or two-component liquid silicone can be mixed and delivered. It can be transported and mixed in the injection cylinder 33.

[0071] A screw shaft 37 is rotatably connected inside the syringe 33. A main shaft seat 38 is fixed in the upper housing 31. An organic shaft 39 is rotatably connected inside the main shaft seat 38. One end of the screw shaft 37 extends coaxially into and is connected to the organic shaft 39.

[0072] The feeder 4 is coaxially fixed at the end of the injection cylinder 33 away from the injection seat 34. One end of the feeder 4 is sealed with a needle valve nozzle 310. The needle valve nozzle 310 can automatically close the injection port after injection to avoid stringing.

[0073] In this embodiment, a heater (not shown in the figure) is provided inside the lower housing 32, which can realize external heating of the injection cylinder 33 and prevent the liquid silicone in the injection cylinder 33 from curing prematurely due to temperature changes.

[0074] In this embodiment, a central channel 41 is provided in the center of the feeder 4, and a feed tube 42 is vertically connected in the central channel 41. The lower end of the feed tube 42 extends into and connects to the needle valve nozzle 310. In this way, during the initial injection operation, the liquid silicone conveyed in the injection cylinder 33 can directly enter the feed tube 42, and then enter the needle valve nozzle 310 through the feed tube 42, realizing a large-volume and rapid injection of liquid silicone. The large flow rate of liquid silicone quickly fills the mold cavity body, avoiding premature solidification of the liquid silicone during the flow process and ensuring the fluidity of the material.

[0075] The feeder 4 has a flow-stopping cavity at the upper end of the central channel. A flow-stopping sleeve 43 is slidably connected in the flow-stopping cavity. A valve hole is opened at the lower end of the flow-stopping sleeve 43. A valve plug 44 is fixed in the flow-stopping cavity below the flow-stopping sleeve 43 and slides and seals with the valve hole. During the initial injection operation, the valve hole and the valve plug 44 are in a separated state so that the valve hole remains open.

[0076] The feeder 4 has a fixed sub-cylinder 5 inside, and the sub-cylinder 5 has multiple injection chambers distributed around its circumference. The feeder 4 has multiple side channels 45 inside, one end of each side channel 45 is connected to the injection chamber, and the other end is connected to the interception chamber.

[0077] The side wall of the intercepting sleeve 43 is provided with multiple side holes 46. It should be noted that when the valve hole and the valve plug 44 are separated, the side holes 46 of the intercepting sleeve 43 are staggered with the side channels 45 to ensure that the liquid silicone can flow into the guide pipe 42 through the valve hole. When the valve hole and the valve plug 44 are in sealed contact during the sliding adjustment of the intercepting sleeve 43, each side hole 46 is connected to the side channel 45. At this time, the liquid silicone enters the sub-cylinder 5 through the side channel 45 so as to be injected precisely in micro-volume through each injection chamber of the sub-cylinder 5. The intercepting sleeve 43 can be axially slidably adjusted by using a traditional electromagnet drive or hydraulic drive (which is existing technology and will not be described in detail).

[0078] In a preferred embodiment, a piston shaft 51 is slidably connected to each injection chamber, and a one-way outlet hole 52 is provided on one side of each injection chamber. The other end of each one-way outlet hole 52 is connected to the central channel 41. In this way, during micro-injection, liquid silicone can flow into the central channel 41 through each injection chamber, and then enter the needle valve nozzle 310 through the central channel 41. The dual injection mode adopted by this device can reduce the generation of flash from the source, and the rapid injection ensures the fluidity of the material, avoiding insufficient injection speed and material cooling during flow, which affects the mold filling quality. It can also improve the injection accuracy in micro-injection and avoid over-injection or under-injection.

[0079] The lower end of the feeder 4 is equipped with an end seat 53, and a guide plate 54 is provided inside the end seat 53. The guide plate 54 can be oscillating in the end seat 53 via a ball shaft. An inner channel 55 is opened inside the end seat 53 and is connected to the central channel 51. The other end of the inner channel 55 is connected to the needle valve nozzle 310.

[0080] The guide plate 54 has universal joints distributed around its circumference that are connected to the piston shaft 51.

[0081] An inclined plate 56 is rotatably connected inside the end seat 53, and the upper inclined surface of the inclined plate 56 abuts against the guide plate 54.

[0082] The swash plate 56 is fitted with driven teeth, and a drive motor (not shown in the figure) is installed inside the lower housing 32. The output end of the drive motor is driven by the driven teeth through a gear. In other words, during micro-injection, the drive motor drives the swash plate 56 to rotate continuously, which in turn pushes the guide plate 54 to swing. The piston shaft 51 in each injection chamber can sequentially draw and expel liquid silicone through up-and-down reciprocating sliding, thereby realizing the micro-injection of liquid silicone from each injection chamber into the central channel 51, thus achieving micro-injection of liquid silicone and improving the injection volume accuracy.

[0083] In this embodiment, a positioning plate 6 is installed below each of the lower molds 14, and the lower end face of the positioning plate 6 is fixed to the plate moving device 2;

[0084] The positioning plate 6 is vertically connected to the four corners of the positioning plate 6, and the upper mold 13 is provided with positioning holes that cooperate with the positioning shafts 61, so as to achieve precise positioning of the positioning plate 6 and the upper mold 13 during mold closing.

[0085] The upper surface of the lower mold 14 is provided with an exhaust groove 16. The exhaust groove 16 can remain open during the initial injection operation. In this way, the high-speed advancing liquid silicone can actively push the gas in the mold cavity to be discharged through the exhaust groove 16. The exhaust is thorough and there is no trapped air phenomenon. The lower surface of the upper mold 13 is provided with a sealing edge corresponding to the exhaust groove 16.

[0086] In this embodiment, straight slot holes 62 are provided at the four corners of the lower mold 14, and each of the positioning auxiliary shafts 61 passes through and is connected in the straight slot holes 62. The lower mold 14 is slidably connected to the positioning plate 6 through the sliding fit between the straight slot holes 62 and the positioning auxiliary shafts 61. When the lower mold 14 is aligned with the center of the positioning plate 6, the sealing edge and the venting groove 16 form a sealing fit. That is to say, during the initial injection operation, the lower mold 14 and the positioning plate 6 are not aligned with the center. At this time, the upper mold 13 and the lower mold 14 are not aligned with the center. There is a gap between the venting groove 16 and the sealing edge of the upper mold 13. The venting groove 16 is in an open state. At this time, the liquid silicone will squeeze out the gas in the mold cavity during high-pressure injection. During the micro-injection operation, the lower mold 14 and the positioning plate 6 are aligned with the center. At this time, the upper mold 13 and the lower mold 14 are aligned. The venting groove 16 is kept closed by the sealing edge. The liquid silicone completely fills the mold cavity during micro-injection, ensuring the precision molding of the eardrum product.

[0087] Two of the positioning off-axis 61 located diagonally are rotatably connected to the positioning plate 6; each of the two positioning off-axis 61 is fixed with a convex shaft 63, and a guide pin is fixed on the convex shaft 63;

[0088] Furthermore, two guide grooves 64 are provided in the lower mold 14, and the guide pin is slidably connected in the guide grooves 64. The guide grooves 64 are perpendicular to the straight slot hole 62. With this configuration, when the two positioning off-shafts 61 deflect synchronously, they can push the lower mold 14 to slide and adjust along the length direction of the straight slot hole 62 through the sliding action of the guide pin and the guide groove 64, thereby realizing the center alignment or non-center alignment of the lower mold 14 with the positioning plate 6.

[0089] The positioning plate 6 is rotatably connected to a gear connecting disc 65, and two positioning offshafts 61 are fitted with fixed teeth, which mesh with the gear connecting disc 65.

[0090] In this embodiment, a positioning spindle 66 is vertically slidably connected inside the upper mold 13, and a locking hole 67 is opened at the corresponding position on the lower mold 14. In this way, when the lower mold 14 is aligned with the center of the positioning plate 6, the positioning spindle 66 inside the upper mold 13 can extend into the locking hole 67 during vertical sliding, so as to achieve precise positioning of the lower mold 14.

[0091] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A liquid silicone injection molding machine for a hearing aid hemidiaphragm, characterized in that, It includes: The base (1) has multiple symmetrically distributed optical axes (11) vertically arranged on its upper end face; A movable plate (12) is arranged parallel above the base (1), and the movable plate (12) is slidably connected to each of the optical axes (11); The upper mold (13) is fixed to the lower end face of the movable plate (12); The injection unit (3) is vertically connected above the movable plate (12), and the lower injection port of the injection unit (3) is connected to the upper mold (13); A plate-shifting device (2) is installed on the upper end face of the base (1); The lower mold (14) is installed on the upper end face of the plate moving device (2). A lifting cylinder is installed on the base (1), and the extension end of the lifting cylinder is connected to the movable plate (12).

2. The liquid silicone injection molding machine for a hearing aid hemidiaphragm according to claim 1, characterized in that, The plate-shifting device (2) includes: A fixing frame (21) is horizontally fixed inside the base (1), and a plurality of parallel first guide rails are provided on the surface of the fixing frame (21); The L-shaped plate (22) is slidably connected to the first guide rail by a slider. Two second guide rails are symmetrically arranged on the L-shaped plate (22), and the second guide rails are perpendicular to the first guide rail. The base plate (23) is slidably connected to the second guide rail via a slider. The fixed frame (21) and the L-shaped plate (22) are both rotatably connected with lead screws (24). The lower end faces of the L-shaped plate (22) and the base plate (23) are respectively fixed with a first threaded sleeve and a second threaded sleeve that are threadedly engaged with the lead screws (24).

3. The liquid silicone injection molding machine for a hearing aid hemidiaphragm according to claim 1, characterized in that: Two protective plates (15) are symmetrically arranged on the base (1). Each protective plate (15) is vertically fixed to the upper surface of the base (1). One of the protective plates (15) is provided with a viewing window. The lower mold (14) is configured as two, and the two lower molds (14) are distributed in parallel.

4. The liquid silicone injection molding machine for a hearing aid hemidiaphragm according to claim 1, characterized in that, The injection unit (3) includes: The upper housing (31) has a lower housing (32) fixed to its lower end face, and the lower housing (32) is fixed to the movable plate (12); The injection cylinder (33) is vertically connected inside the lower housing (32), and a material hole is provided on the outer wall of one end of the injection cylinder (33); The injection seat (34) is fixed inside the lower housing (32) and sealed outside the injection cylinder (33). The injection seat (34) has a first conveying hole (35) and a second conveying hole (36), both of which are connected to the material hole. A screw shaft (37) is rotatably connected inside the syringe (33). A main shaft seat (38) is fixed in the upper housing (31). An organic shaft (39) is rotatably connected inside the main shaft seat (38). One end of the screw shaft (37) extends coaxially into and is connected to the organic shaft (39). The feeder (4) is coaxially fixed to one end of the injection cylinder (33) away from the injection seat (34), and one end of the feeder (4) is sealed to a needle valve nozzle (310).

5. A liquid silicone injection molding machine for a hearing aid hemidiaphragm according to claim 4, characterized in that: A heater is provided inside the lower housing (32).

6. The liquid silicone injection molding machine for a hearing aid hemidiaphragm according to claim 4, characterized in that: The feeder (4) has a central channel (41) in the center, and a feed tube (42) is vertically connected in the central channel (41). The lower end of the feed tube (42) extends into and is connected to the needle valve nozzle (310). The feeder (4) has a flow-stopping cavity at the upper end of the central channel. A flow-stopping sleeve (43) is slidably connected in the flow-stopping cavity. A valve hole is opened at the lower end of the flow-stopping sleeve (43). A valve plug (44) that slides and seals with the valve hole is fixed in the flow-stopping cavity below the flow-stopping sleeve (43). The feeder (4) has a sub-cylinder (5) fixed inside. The sub-cylinder (5) has multiple injection chambers distributed around its circumference. The feeder (4) has multiple side channels (45) inside. One end of each side channel (45) is connected to the injection chamber, and the other end is connected to the interception chamber. The intercepting sleeve (43) has multiple side holes (46) on its side wall.

7. A liquid silicone injection molding machine for a hearing aid hemidiaphragm according to claim 6, characterized in that: A piston shaft (51) is slidably connected inside each injection chamber, and a one-way row hole (52) is opened on one side of each injection chamber. The other end of each one-way row hole (52) is connected to the central channel (41). The lower end of the feeder (4) is equipped with an end seat (53), and a guide plate (54) is provided inside the end seat (53); an inner channel (55) is opened inside the end seat (53) and communicates with the central channel (51), and the other end of the inner channel (55) is connected to the needle valve nozzle (310). The guide plate (54) has universal joints that are connected to the piston shaft (51) distributed around its circumference; The end seat (53) is rotatably connected to a swashplate (56), and the upper inclined surface of the swashplate (56) abuts against the guide plate (54). The swash plate (56) is fitted with a driven tooth, and a drive motor is installed inside the lower housing (32). The output end of the drive motor meshes with the driven tooth through a gear.

8. A liquid silicone injection molding machine for a hearing aid hemidiaphragm according to claim 3, characterized in that: A positioning plate (6) is installed below each of the lower molds (14), and the lower end face of the positioning plate (6) is fixed to the plate moving device (2); The four corners of the positioning plate (6) are vertically connected to positioning off-axis (61), and the upper mold (13) is provided with positioning holes that cooperate with the positioning off-axis (61). The upper surface of the lower mold (14) is provided with an exhaust groove (16), and the lower surface of the upper mold (13) is provided with a sealing edge corresponding to the exhaust groove (16).

9. A liquid silicone injection molding machine for a hearing aid hemidiaphragm according to claim 8, characterized in that: The lower mold (14) has straight slot holes (62) at its four corners, and each of the positioning off-shafts (61) is connected through the straight slot holes (62). The lower mold (14) is slidably connected to the positioning plate (6) through the sliding fit between the straight slot holes (62) and the positioning off-shafts (61). When the lower mold (14) and the center of the positioning plate (6) are aligned, the sealing edge and the exhaust groove (16) form a sealing fit. Two of the positioning off-axis (61) located diagonally are rotatably connected to the positioning plate (6); a convex shaft (63) is fixed on each of the two positioning off-axis (61), and a guide pin is fixed on the convex shaft (63); Furthermore, two guide grooves (64) are provided in the lower mold (14), and the guide pin is slidably connected in the guide grooves (64). The guide grooves (64) and the straight groove holes (62) are distributed perpendicularly. The positioning plate (6) is rotatably connected to a gear connecting disc (65), and two positioning offshafts (61) are fitted with fixed teeth, and the gear connecting disc (65) meshes with the fixed teeth.

10. A liquid silicone injection molding machine for a hearing aid hemidiaphragm according to claim 9, characterized in that: The upper mold (13) is vertically slidably connected to a positioning spindle (66), and the lower mold (14) has a corresponding locking hole (67).

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