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CN-121973392-A - Hearing aid semi-eardrum liquid silicone injection molding machine

CN121973392ACN 121973392 ACN121973392 ACN 121973392ACN-121973392-A

Abstract

The invention discloses a hearing aid semi-eardrum liquid silica gel injection molding machine which comprises a machine base, a movable plate, an upper die, an injection unit, a plate moving device, a lower die and a plurality of injection cavities, wherein the movable plate is arranged above the machine base in parallel, the upper die is fixed on the lower end face of the movable plate, the injection unit is vertically connected above the movable plate, the plate moving device is arranged on the upper end face of the machine base, the lower die is arranged on the upper end face of the plate moving device, the plate moving device can move the lower die above the lower die in the horizontal direction for fine adjustment, and can move the lower die to an external station, so that a worker can conveniently perform demolding operation to realize continuous operation, the injection unit can perform liquid silica gel fast injection through a central channel, an exhaust groove on the surface of the lower die is kept open, gas in the die cavity is fully discharged, then the lower die is aligned with the upper die in the horizontal sliding process, the exhaust groove is completely closed, the injection unit can perform liquid silica gel accurate injection through the plurality of injection cavities, and the molding accuracy is ensured.

Inventors

  • Shao Kanglu
  • CHEN XIAOHUA
  • ZHAO YANG
  • DU JINGXIA
  • YANG RONGRONG

Assignees

  • 深圳百聆鸟听力技术有限公司

Dates

Publication Date
20260505
Application Date
20260316

Claims (10)

  1. 1. A hearing aid semi-eardrum liquid silicone injection molding machine, characterized in that it comprises: the device comprises a base (1), wherein a plurality of symmetrically distributed optical axes (11) are vertically arranged on the upper end surface of the base; the movable plates (12) are arranged above the machine base (1) in parallel, and the movable plates (12) are connected with the optical axes (11) in a sliding manner; an upper die (13) fixed on the lower end surface of the movable plate (12); The injection unit (3) is vertically connected above the movable plate (12), and an injection port at the lower end of the injection unit (3) is communicated with the upper die (13); the plate moving device (2) is arranged on the upper end face of the base (1); The lower die (14) is arranged on the upper end face of the plate moving device (2), a lifting cylinder is arranged on the base (1), and the telescopic end of the lifting cylinder is connected with the movable plate (12).
  2. 2. A hearing aid semi-eardrum liquid silicone injection molding machine according to claim 1, characterized in that the plate moving device (2) comprises: The fixing frame (21) is horizontally fixed in the machine base (1), and a plurality of first guide rails which are distributed in parallel are arranged on the surface of the fixing frame (21); The L-shaped plate (22) is in sliding connection with the first guide rail through a sliding block, two second guide rails are symmetrically arranged on the L-shaped plate (22), and the second guide rails and the first guide rails are vertically distributed; The bottom plate (23) is in sliding connection with the second guide rail through a sliding block, the fixing frame (21) and the L-shaped plate (22) are both rotationally connected with a screw rod (24), and a first screw sleeve and a second screw sleeve which are in threaded fit with the screw rod (24) are respectively fixed on the lower end surfaces of the L-shaped plate (22) and the bottom plate (23).
  3. 3. The hearing aid semi-eardrum liquid silica gel injection molding machine according to claim 1, wherein two protection plates (15) are symmetrically arranged on the machine base (1), each protection plate (15) is vertically fixed on the upper end surface of the machine base (1), and one protection plate (15) is provided with a visual window; the number of the lower dies (14) is two, and the two lower dies (14) are distributed in parallel.
  4. 4. A hearing aid semi-eardrum liquid silicone injection molding machine according to claim 1, characterized in that the injection unit (3) comprises: an upper casing (31), the lower end surface of which is fixed with a lower casing (32), the lower casing (32) is fixed with the movable plate (12); the injection cylinder (33) is vertically connected in the lower shell (32), and a material hole is formed in the outer wall of one end of the injection cylinder (33); The injection seat (34) is fixed in the lower shell (32) and is sealed and sleeved outside the injection cylinder (33), a first conveying hole (35) and a second conveying hole (36) are formed in the injection seat (34), and the first conveying hole (35) and the second conveying hole (36) are communicated with the material hole; A screw shaft (37) rotatably connected in the injection cylinder (33), wherein a main shaft seat (38) is fixed in the upper casing (31), a shaft (39) is rotatably connected in the main shaft seat (38), and one end of the screw shaft (37) coaxially extends into and is connected in the shaft (39); The guide device (4) is coaxially fixed at one end of the injection cylinder (33) far away from the injection seat (34), and one end of the guide device (4) is connected with a needle valve type nozzle (310) in a sealing way.
  5. 5. The hearing aid semi-eardrum liquid silicone injection molding machine of claim 4, wherein a heater is arranged in the lower shell (32).
  6. 6. The hearing aid semi-eardrum liquid silica gel injection molding machine according to claim 4, wherein a central channel (41) is formed in the center of the guide device (4), a guide pipe (42) is vertically connected in the central channel (41), and the lower end of the guide pipe (42) extends into the needle valve type nozzle (310); the guide device (4) is positioned at the upper end of the central channel and is provided with a shutoff cavity, a shutoff sleeve (43) is slidably connected in the shutoff cavity, the lower end of the shutoff sleeve (43) is provided with a valve hole, and a valve plug (44) which is in sliding sealing fit with the valve hole is fixed below the shutoff sleeve (43) in the shutoff cavity; An auxiliary cylinder body (5) is fixed in the guide device (4), a plurality of injection cavities are distributed on the inner circumference of the auxiliary cylinder body (5), a plurality of side channels (45) are formed in the guide device (4), one end of each side channel (45) is communicated with the injection cavity, and the other end of each side channel is communicated with the intercepting cavity; The side wall of the intercepting sleeve (43) is provided with a plurality of side holes (46).
  7. 7. The hearing aid semi-eardrum liquid silica gel injection molding machine according to claim 6, wherein the injection cavities are all connected with piston shafts (51) in a sliding manner, one side of each injection cavity is provided with a one-way row hole (52), and the other end of each one-way row hole (52) is communicated with the central channel (41); An end seat (53) is arranged at the lower end of the material guide (4), a guide disc (54) is arranged in the end seat (53), an inner channel (55) communicated with the central channel (51) is arranged in the end seat (53), and the other end of the inner channel (55) is communicated with the needle valve type nozzle (310); The circumference of the guide disc (54) is provided with universal connecting shafts connected with the piston shaft (51); A swash plate (56) is rotationally connected to the end seat (53), and the upper end inclined surface of the swash plate (56) is in abutting contact with the guide disc (54); Driven teeth are sleeved outside the swash plate (56), a driving motor is installed in the lower casing (32), and the output end of the driving motor is meshed with the driven teeth through a gear for transmission.
  8. 8. The hearing aid semi-eardrum liquid silica gel injection molding machine according to claim 3, wherein a positioning plate (6) is arranged below each lower die (14), and the lower end surface of the positioning plate (6) is fixed with the plate moving device (2); positioning side shafts (61) are vertically connected to four corners of the positioning plate (6), and positioning holes matched with the positioning side shafts (61) are correspondingly formed in the upper die (13); an exhaust groove (16) is formed in the upper surface of the lower die (14), and a sealing edge corresponding to the exhaust groove (16) is arranged on the lower surface of the upper die (13).
  9. 9. The hearing aid semi-eardrum liquid silica gel injection molding machine according to claim 8, wherein straight slot holes (62) are formed in four corners of the lower die (14), each positioning bypass shaft (61) is connected in the straight slot holes (62) in a penetrating manner, the lower die (14) is connected with the positioning plate (6) in a sliding manner through sliding fit of the straight slot holes (62) and the positioning bypass shafts (61), and when the centers of the lower die (14) and the positioning plate (6) are aligned, the sealing edges are in sealing fit with the exhaust slots (16); Two of the positioning paraxial shafts (61) at diagonal positions are both rotationally connected to the positioning plate (6), a protruding shaft (63) is fixed on each of the two positioning paraxial shafts (61), and a guide pin is fixed on each protruding shaft (63); two guide grooves (64) are formed in the lower die (14), the guide pins are connected in the guide grooves (64) in a sliding mode, and the guide grooves (64) and the straight groove holes (62) are vertically distributed; The positioning plate (6) is rotationally connected with a gear connecting disc (65), fixed teeth are sleeved on the two positioning side shafts (61), and the gear connecting disc (65) is meshed with the fixed teeth.
  10. 10. The hearing aid semi-eardrum liquid silicone injection molding machine according to claim 9, wherein a positioning main shaft (66) is vertically and slidably connected in the upper die (13), and a locking hole (67) is formed in a corresponding position on the lower die (14).

Description

Hearing aid semi-eardrum liquid silicone injection molding machine Technical Field The invention belongs to the technical field of injection molding, and particularly relates to a hearing aid semi-eardrum liquid silica gel injection molding machine. Background The hearing aid semi-eardrum is used as a key component for connecting a hearing aid host machine and an auditory canal, the material and manufacturing precision of the hearing aid semi-eardrum directly influence wearing comfort and acoustic effect, the traditional injection molding machine has the defects of air exhaust and air trapping at present, the traditional injection molding machine depends on a tiny air exhaust groove of a mold, the abnormal shape with deep cavities and blind holes of the hearing aid eardrum is often incomplete in air exhaust, so that bubble waste is caused, although part of the injection molding machine can be connected with a vacuum pump, the vacuum holding capacity at the moment of mold closing is limited, if air in a mold cavity cannot be completely exhausted, the silica gel can wrap the air in dead angles during rapid filling, the air bubbles appear in a finished product, and the appearance and acoustic tightness are seriously influenced. In addition, the traditional injection molding machine adopts a large-diameter screw rod or a plunger for quick injection, has poor metering precision and is easy to inject excessive or insufficient, and if only a miniature injection unit is adopted to ensure the precision, the injection speed is insufficient, and the material is cooled in the flowing process, so that the mold filling quality is influenced. Therefore, it is necessary to provide a hearing aid semi-eardrum liquid silicone injection molding machine to solve the above-mentioned problems in the background art. Disclosure of Invention In order to achieve the purpose, the invention provides the following technical scheme that the hearing aid semi-eardrum liquid silicone injection molding machine comprises: the upper end surface of the machine base is vertically provided with a plurality of symmetrically distributed optical axes; The movable plates are arranged above the machine base in parallel and are connected with the optical axes in a sliding manner; An upper die fixed on the lower end surface of the movable plate; the injection unit is vertically connected above the movable plate, and an injection port at the lower end of the injection unit is communicated with the upper die; The plate moving device is arranged on the upper end face of the base; The lower die is arranged on the upper end face of the plate moving device, a lifting cylinder is arranged on the base, and the telescopic end of the lifting cylinder is connected with the movable plate. Further, preferably, the plate moving device includes: the fixing frame is horizontally fixed in the machine base, and a plurality of first guide rails which are distributed in parallel are arranged on the surface of the fixing frame; the L-shaped plate is in sliding connection with the first guide rail through a sliding block, two second guide rails are symmetrically arranged on the L-shaped plate, and the second guide rails and the first guide rails are vertically distributed; The bottom plate is in sliding connection with the second guide rail through the slider, all rotate on mount and the L shaped plate and be connected with the lead screw, the lower terminal surface of L shaped plate and bottom plate is fixed with first swivel nut and the second swivel nut with lead screw thread fit respectively. Further, preferably, two protection plates are symmetrically arranged on the stand, each protection plate is vertically fixed on the upper end surface of the stand, and a visual window is arranged on one protection plate; the number of the lower dies is two, and the two lower dies are distributed in parallel. Further, preferably, the injection unit includes: The lower end face of the upper shell is fixed with a lower shell, and the lower shell is fixed with the movable plate; the injection cylinder is vertically connected in the lower shell, and a material hole is formed in the outer wall of one end of the injection cylinder; the injection seat is fixed in the lower shell and is sealed and sleeved outside the injection cylinder, a first conveying hole and a second conveying hole are formed in the injection seat, and the first conveying hole and the second conveying hole are communicated with the material hole; The screw shaft is rotationally connected in the injection cylinder, a main shaft seat is fixed in the upper shell, a shaft is rotationally connected with the main shaft seat, and one end of the screw shaft coaxially stretches into and is connected in the shaft; and the guide device is coaxially fixed at one end of the injection cylinder far away from the injection seat, and one end of the guide device is hermetically connected with a needle valve type nozzle. Further, prefera