Search

CN-121972608-A - Wax mould for medical semi-support molding

CN121972608ACN 121972608 ACN121972608 ACN 121972608ACN-121972608-A

Abstract

The wax mold for forming the medical semi-support comprises an upper mold and a lower mold, wherein one side of a wax mold body structure is connected with a boss through a necking section, and the lower mold is provided with a first through hole, a plurality of second through holes and a driving structure; the device comprises a lifting plate, a lifting mechanism for driving the lifting plate to lift, a support and a plurality of ejector pins, a movable die, a pair of auxiliary die cavities, a main die cavity, a lifting plate lifting process, a body structure lifting up by the ejector pins, and a movable die, wherein the support and the ejector pins are fixedly arranged on the lifting plate, the movable die comprises two swing arms hinged through a hinge shaft, the support supports the hinge shaft vertically, one end of each swing arm is provided with a movable module, the other end of each swing arm is provided with a driving block, when the lifting plate is located at a first position, the two movable modules are closed and form the auxiliary die cavity, the auxiliary die cavities are in sealed connection with a first through hole, the upper die and the lower die are in butt joint with the end parts of the ejector pins, and the ejector pins lift up the body structure synchronously until the driving blocks and the driving structures act, and when the lifting plate is located at a second position, the two movable modules are located at positions avoiding bosses, so that the forming precision of the wax die is improved, and the labor intensity is reduced.

Inventors

  • YU NINGPENG
  • WU ZHONGMING

Assignees

  • 无锡卡仕精密科技有限公司

Dates

Publication Date
20260505
Application Date
20260319

Claims (10)

  1. 1. The wax mould for medical semi-support forming is characterized in that the wax mould (2) comprises a body structure (21), one side of the body structure (21) is connected with a boss (22) through a necking section (23), and the mould comprises an upper mould (1); a lower die (4), wherein a first through hole (41), a plurality of second through holes (42) and a driving structure (44) are arranged on the lower die (4); the jacking mechanism (8) is fixedly arranged relative to the lower die (4); the lifting plate (7) is positioned at one side of the lower die (4) away from the upper die (1), and the jacking mechanism (8) is in transmission connection with the lifting plate (7) so as to enable the lifting plate (7) to vertically lift; The bracket (5) is fixedly arranged on the lifting plate (7); the movable die (3) comprises swing arms (31) and hinge shafts (32) with rod-shaped structures, the middle parts of the two swing arms (31) are hinged through the hinge shafts (32), the support (5) is connected with the hinge shafts (32) and vertically supports the hinge shafts (32), one end of each swing arm (31) is a movable module (311), and the other end of each swing arm is a driving block (312); The ejector pins (6) are fixedly arranged on the lifting plate (7), and the ejector pins (6) are in sliding and sealing connection with the second through holes (42); when the lifting plate (7) is positioned at the first position, the two movable modules (311) are closed and form auxiliary cavities for forming the boss (22) and the necking section (23), the two movable modules (311) are connected with the first through hole (41) in a sealing mode, and after the upper die (1) is in butt joint with the lower die (4), the upper die and the end part of the thimble (6) form a main cavity for forming the body structure (21); in the lifting plate (7) lifting process, the ejector pin (6) jacks up the body structure (21), the movable die (3) synchronously lifts up until the driving block (312) and the driving structure (44) act, the two movable modules (311) are mutually far away, and when the lifting plate (7) is located at the second position, the two movable modules (311) are located at positions avoiding the boss (22).
  2. 2. The wax pattern mold for medical half-support molding according to claim 1, wherein the necking section (23) and the boss (22) are coaxially arranged revolution bodies, the surface of the necking section (23) facing the boss (22) is a first revolution surface (25), and the cross-sectional profile diameter of the first revolution surface (25) gradually decreases from the necking section (23) to the boss (22); the surface of the boss (22) facing the necking section (23) is a second rotation surface (24), and the cross-sectional profile diameter of the second rotation surface (24) gradually decreases from the boss (22) to the necking section (23).
  3. 3. The wax pattern mold for medical half-support molding according to claim 1, wherein the driving structure (44) is a through hole penetrating the lower mold (4), and the driving structure (44) is located right below the first through hole (41); The swing arm (31) comprises an upper rod section (314) and a lower rod section (313), one end of the upper rod section (314) is provided with the movable module (311), the other end of the upper rod section (314) is fixedly connected with one end of the lower rod section (313), and the other end of the lower rod section (313) is provided with the driving block (312); The upper rod section (314) corresponds to the first through hole (41), the lower rod section (313) corresponds to the driving structure (44), a driving inclined surface (3121) is arranged on the driving block (312), the two lower rod sections (313) are hinged through a hinge shaft (32) and are simultaneously elastically connected through a first elastic piece (34), the hinge shaft (32) is positioned between the movable module (311) and the first elastic piece (34), the outer wall surfaces of the two lower rod sections (313) are in sliding connection with the driving structure (44), and a swinging gap (35) is reserved between the two lower rod sections (313); During the lifting of the lifting plate (7), the lower rod section (313) moves upwards in the driving structure (44), the driving inclined surface (3121) acts on the lower end of the driving structure (44), the first elastic element (34) is compressed, the swinging clearance (35) is reduced until the lifting plate (7) is in the second position, and the upper rod section (314) is positioned in the first through hole (41); In the descending process of the lifting plate (7), after the lower end of the driving structure (44) is far away from the driving inclined plane (3121), under the elastic action of the first elastic piece (34), the two movable modules (311) are close to each other until the lifting plate (7) is located at the first position, and the movable modules (311) are located in the first through holes (41).
  4. 4. A wax mould for medical semi-support moulding according to claim 3, wherein the lower rod section (313) is provided with sliding surfaces (3132), and when the two movable modules (311) are closed, the sliding surfaces (3132) are parallel and away from each other, and the sliding surfaces (3132) are in surface contact with the inner wall surface of the driving structure (44).
  5. 5. A wax mold for medical use in a half-cradle formation according to claim 4, wherein the sliding surface (3132) is planar.
  6. 6. A wax mould for medical semi-support moulding according to claim 3, wherein a first limiting surface (3131) parallel to the axis of the hinge shaft (32) is arranged at one end of the lower rod section (313) connected with the upper rod section (314), when the lifting plate (7) is positioned at the second position, the first limiting surface (3131) is contacted with the inner wall surface of the driving structure (44), and an avoidance gap is arranged between the upper rod section (314) and the inner wall surface of the first through hole (41).
  7. 7. The wax mold for medical half-support molding of claim 3, wherein the driving blocks (312) are provided with second limiting surfaces (3122), the second limiting surfaces (3122) of the two driving blocks (312) are arranged opposite to each other, and when the lifting plate (7) is positioned at the second position, the second limiting surfaces (3122) of the two driving blocks (312) are in surface contact, and the driving inclined surfaces (3121) are in contact with the lower end of the driving structure (44).
  8. 8. A wax mold for medical half-support molding as claimed in claim 3, characterized in that the contact portion of the lower end of the driving structure (44) with the driving bevel (3121) is provided with an arc chamfer (441).
  9. 9. The wax pattern mold for medical half-support molding according to claim 1, wherein the lifting plate (7) is vertically slidably arranged with respect to the lower mold (4); Still include base (9), base (9) fixed support bed die (4), be equipped with on base (9) climbing mechanism (8), climbing mechanism (8) include: a rotating shaft (81) rotatably mounted on the base (9); the cam (82) is fixedly arranged on the rotating shaft (81) and is positioned below the lifting plate (7); The contact position of the cam (82) and the lower surface of the lifting plate (7) is increased relative to the vertical height of the axis of the rotating shaft (81) in the forward rotation process, so that the lifting plate (7) is driven to ascend, and the contact position of the cam (82) and the lower surface of the lifting plate (7) is reduced relative to the vertical height of the axis of the rotating shaft (81) in the reverse rotation process of the rotating shaft (81), so that the lifting plate (7) is driven to descend.
  10. 10. The wax mold for medical semi-support molding according to claim 9, wherein a guide rod (71) is fixedly arranged on the lifting plate (7), a guide hole (45) which is in sliding fit with the guide rod (71) is arranged on the lower mold (4), the wax mold further comprises a second elastic piece (72), the second elastic piece (72) is used for elastically connecting the lower mold (4) with the lifting plate (7), and the second elastic piece (72) is in a compressed state.

Description

Wax mould for medical semi-support molding Technical Field The invention relates to the technical field of wax mould moulds, in particular to a wax mould for medical semi-support forming. Background The current medical semi-support adopts casting molding at present, because the medical semi-support includes the body structure and is located body structure one side and sets up boss 22, boss 22 is connected with body structure 21 through the section of necking 23, and section of necking 23 and boss 22 are shown as fig. 3, are the perspective view of medical semi-support. Because the special structure of the medical semi-support is formed by adopting a movable block type mould in the casting process, the mould has two main core problems: 1. the operation is complicated, staff needs to manually align the movable block of the die with the die holder and manually apply the die clamping force, the labor intensity is high, the product forming precision is not enough easily caused by the alignment deviation of the movable block, and the rejection rate is as high as 8% -12%; 2. inconvenient die picking, the movable block die picking requires staff to pry the movable block by means of a tool to separate from the die cavity, then manually stretch into the die to take out the product, the operation steps are more (usually 3-5 steps are needed), the labor intensity is high, the surface of the product is easily scratched in the process of prying the movable block, the splicing part of the movable block is damaged, the product percent of pass is low, and the die maintenance cost is high. Disclosure of Invention The inventor aims at the defects in the prior art, and provides a wax mould for medical half-support forming, so that the forming precision of the wax mould is improved, and the labor intensity of operators is reduced. The technical scheme adopted by the invention is as follows: A wax mould for medical half-support forming comprises a body structure, wherein one side of the body structure is connected with a boss through a necking section, and the mould comprises an upper mould; the lower die is provided with a first through hole, a plurality of second through holes and a driving structure; The jacking mechanism is fixedly arranged relative to the lower die; The lifting plate is positioned at one side of the lower die, which is away from the upper die, and the jacking mechanism is in transmission connection with the lifting plate, so that the lifting plate is lifted vertically; the bracket is fixedly arranged on the lifting plate; The movable die comprises swing arms with rod-shaped structures and a hinge shaft, the middle parts of the two swing arms are hinged through the hinge shaft, the support is connected with the hinge shaft and vertically supports the hinge shaft, one end of each swing arm is a movable module, and the other end of each swing arm is a driving block; the ejector pins are fixedly arranged on the lifting plate, and are in sliding and sealing connection with the second through holes; When the lifting plate is positioned at the first position, the two movable modules are closed to form an auxiliary cavity for forming the boss and the necking section, the two movable modules are connected with the first through hole in a sealing mode, and after the upper die is in butt joint with the lower die, the upper die and the end portion of the ejector pin form a main cavity for forming the body structure; in the lifting plate lifting process, the ejector pin jacks up the body structure, the movable die ascends synchronously until the driving block and the driving structure act, the two movable modules are mutually far away, and when the lifting plate is located at the second position, the two movable modules are located at positions avoiding the boss. As a further improvement of the above technical scheme: The necking section and the boss are coaxially arranged gyrorotor, the surface of the necking section facing the boss is a first gyratory surface, and the cross section outline diameter of the first gyratory surface is gradually reduced from the necking section to the boss; the surface of the boss facing the necking section is a second revolution surface, and the cross-sectional profile diameter of the second revolution surface is gradually reduced from the boss to the necking section. The driving structure is a through hole penetrating through the lower die, and is positioned right below the first through hole; the swing arm comprises an upper rod section and a lower rod section, one end of the upper rod section is provided with the movable module, the other end of the upper rod section is fixedly connected with one end of the lower rod section, and the other end of the lower rod section is provided with the driving block; The upper rod section corresponds to the first through hole, the lower rod section corresponds to the driving structure, a driving inclined plane is arranged on the driving block, the t