CN212070394U

CN212070394U - Medical tweezers powder injection mold without thimble print

Info

Publication number: CN212070394U
Application number: CN201922442571.1U
Authority: CN
Inventors: 邓湘
Original assignee: Jufu Medical Technology Suzhou Co ltd
Current assignee: Jufu Medical Technology Suzhou Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-12-04
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a medical tweezers powder injection mold of no thimble seal, including last mould and die block, its characterized in that, it forms the die cavity with the die block compound die to go up the mould, the die cavity is including moulding plastics embryo spare outline die cavity and a plurality of lifting part die cavity, mould plastics embryo spare outline die cavity and lifting part die cavity intercommunication setting, lifting part die cavity is including setting up a plurality of punctiform die cavities and the setting of moulding plastics between two embryo spare outline die cavities of moulding plastics in moulding plastics embryo spare outline die cavity side, the below of lifting part die cavity is provided with the thimble hole, can insert the thimble in the thimble hole. The utility model discloses a medical tweezers powder injection mould of no thimble seal is not direct with the thimble top on medical tweezers after the completion of moulding plastics, prevents at the fracture of the ejecting in-process medical tweezers of thimble, warp, simultaneously, makes the surface of medical tweezers not have the thimble seal, makes medical tweezers more pleasing to the eye.

Description

Medical tweezers powder injection mold without thimble print

Technical Field

The utility model relates to the field of medical equipment manufacturing, concretely relates to medical tweezers powder injection mould of no thimble seal.

Background

Metal Injection Molding (MIM) is a Molding method in which a plasticized mixture of Metal powder and a binder thereof is injected into a mold. The method is an emerging forming technology which is developed by creatively combining the injection forming technology of the plastic industry on the basis of the traditional powder metallurgy technology. MIM can produce parts with very complicated shapes, can prepare parts with final shapes to the maximum extent without subsequent machining or only with minimum machining, is suitable for mass production and has high production efficiency. The powder injection molding stainless steel has good corrosion resistance, and is widely applied to the industries of machinery, chemical engineering, ships, automobiles, medical appliances and the like.

Currently, in the design of powder molding (MIM) dies, there is a thimble design for ejecting blanks, which causes deformation, top shadow, easy breakage of blanks, etc., and causes the reduction of manufacturing cost and quality in the later period.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a medical tweezers powder injection mold of no thimble seal, not directly push up the thimble on medical tweezers after the completion of moulding plastics, prevent at the ejecting in-process medical tweezers fracture, deformation of thimble, simultaneously, make the surface of medical tweezers not have the thimble seal, make medical tweezers more pleasing to the eye.

In order to solve the technical problem, the utility model provides a medical tweezers powder injection mold of no thimble seal, including last mould and die block, its characterized in that, it forms the die cavity with the die block compound die to go up the mould, the die cavity is including moulding plastics embryo spare outline die cavity and a plurality of lifting part die cavity, mould plastics embryo spare outline die cavity and lifting part die cavity intercommunication setting, lifting part die cavity is including setting up a plurality of punctiform die cavities of moulding plastics embryo spare outline die cavity side and setting up the connection die cavity between two embryo spare outline die cavities of moulding plastics, the below of lifting part die cavity is provided with the thimble hole, can insert the thimble in the thimble hole.

The utility model discloses a preferred embodiment, further include a plurality of punctiform die cavities set up respectively outside a plurality of sides of the embryo outline die cavity of moulding plastics, and the interval between a plurality of punctiform die cavities on arbitrary one side is the same.

In a preferred embodiment of the present invention, the diameter of the dotted cavity is larger than the diameter of the thimble hole.

In a preferred embodiment of the present invention, a broken part cavity is provided at a junction of the lifting part cavity and the injection molding blank outer contour cavity.

In a preferred embodiment of the present invention, the bottom mold further comprises a mold closing positioning groove disposed at four corners of the bottom mold.

The utility model discloses an in the preferred embodiment, further include upper die fixing plate, die block fixed plate, guide pillar, thimble fixed plate, the upper end of guide pillar is fixed at upper die fixing plate, and the lower extreme of guide pillar is fixed at the die block fixed plate, and it fixes in upper die fixing plate below to go up the mould, and die block fixed plate top is provided with thimble fixed plate, the thimble sets up on thimble fixed plate.

The present invention further provides a method for manufacturing a plastic injection molding machine, which comprises an upper mold fixing plate, an upper mold, a lower mold, a molding cavity, an injection channel, a mold base.

The utility model discloses a preferred embodiment, further include go up the mould and still be provided with oiling passageway in the die block.

The utility model has the advantages that: the utility model discloses divide into the shaping chamber and communicate the embryo spare outline die cavity and a plurality of lifting portion die cavity of setting up, lifting portion die cavity is including setting up a plurality of punctiform die cavities and the connection die cavity between two embryo spare outline die cavities of moulding plastics of embryo spare outline die cavity side of moulding plastics, through setting up a plurality of punctiform die cavities, increases ejecting area; through setting up the connection die cavity, a plurality of embryo spare of moulding plastics in a bed die jack-up simultaneously, be provided with the thimble hole in the below of lifting portion die cavity, after powder injection moulding, utilize the thimble top on lifting portion die cavity, it is together ejecting with the embryo spare of moulding plastics to lift portion, after ejecting with lifting portion from moulding plastics the embryo spare break separation, obtain the embryo spare of moulding plastics, can prevent like this that the embryo spare fracture, the deformation at the ejecting in-process of thimble, simultaneously, make the surface of the embryo spare of moulding plastics not have the thimble seal, make the embryo spare of moulding plastics more pleasing to the eye.

Drawings

Fig. 1 is a schematic structural view of a medical forceps powder injection mold without a thimble print of the present invention;

fig. 2 is a schematic structural view of the bottom mold of the present invention.

The reference numbers in the figures illustrate: 1. an upper die fixing plate; 2. an upper die; 3. bottom die; 31. a die assembly positioning groove; 4. a molding cavity; 41. injection molding an outer contour cavity of the blank; 42. a lifting section cavity; 421. a dotted cavity; 422. connecting the cavity; 43. a thimble hole; 44. a breaking part cavity; 5. a thimble fixing plate; 6. a bottom die fixing plate; 7. a guide post; 8. an injection port; 9. and (4) injecting a flow channel.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1, the utility model discloses a medical tweezers powder injection mould of no thimble seal's an embodiment, including last fixed die plate 1, go up mould 2, die block 3, thimble fixed plate 5, die block fixed plate 6, guide pillar 7, the upper end of guide pillar 7 is fixed at last fixed die plate 1, the lower extreme of guide pillar 7 is fixed at die block fixed plate 6, goes up mould 2 and sets up in 1 below of last fixed die plate, and die block 3 sets up the top of die block

fixed plate

6, 6 tops of die block fixed plate are provided with thimble fixed plate 5, be provided with the thimble on the thimble fixed plate 5, follow guide pillar 7 removes die block fixed plate 6 to 1 orientation of die block fixed plate, makes and goes up mould 2 and 3 compound dies formation shaping chambeies of.

Specifically, an injection port 8 is formed in the upper die fixing plate 1, an injection flow channel 9 is arranged in the upper die 2, the injection flow channel 9 penetrates through the upper die 2, the injection flow channel 9 is respectively communicated with the injection port 8 and the molding cavity 4, powder is injected from the injection port 8, and the powder enters the molding cavity 4 along the injection flow channel 9.

Referring to fig. 2, the molding cavity 4 includes an injection molding blank outer contour cavity 41 and a plurality of lifting portion cavities 42, the injection molding blank outer contour cavity 41 is used for molding an injection molding blank, the lifting portion cavity 42 is used for lifting portion molding, the injection molding blank outer contour cavity 41 and the lifting portion cavity 42 are communicated, the injection molding blank in this embodiment is medical forceps, the lifting portion cavity 42 includes a plurality of dot-shaped cavities 421 arranged on the side surfaces of the medical forceps, the ejection area is increased by arranging the plurality of dot-shaped cavities 421, the bottom mold 3 of this embodiment is provided with two injection molding blank outer contour cavities 41, a connecting cavity 422 is arranged between the two injection molding blank outer contour cavities 41, the dot-shaped cavities 421 and the connecting cavity 422 are provided with ejection pin holes 43, ejection pins can be inserted into the ejection pin holes 43, and are ejected on the lifting portion by the ejection pins after powder injection molding, the lifting part and the injection molding blank are ejected together, the lifting part is broken and separated from the injection molding blank after ejection, and the injection molding blank is obtained, so that the blank can be prevented from being broken and deformed in the ejection process of the ejector pin, and meanwhile, no ejector pin mark is arranged on the surface of the injection molding blank, so that the injection molding blank is more attractive.

Specifically, the plurality of dot-shaped cavities 421 are respectively arranged outside the plurality of side surfaces of the molding blank outer contour cavity 41, and the distances between the plurality of dot-shaped cavities 421 on any one side surface are the same, so that the molding blank and the lifting part can be integrally ejected, and simultaneously the lifting part of each dot-shaped cavity 421 can be stressed the same when the ejector pins are ejected, and the ejection part and the molding blank are prevented from being broken off in the ejection process.

Specifically, the diameter of the dot-shaped cavity 421 is larger than the diameter of the thimble hole 43, so that the end surface of the thimble is completely acted on the lifting part to prevent the thimble from contacting the injection molding blank.

Specifically, in order to facilitate bending and separating the injection molding blank and the lifting portion, a breaking portion cavity 44 is arranged at a connection position of the lifting portion cavity 42 and the injection molding blank outer contour cavity 41, and the breaking portion cavity 44 is thinner than the injection molding blank outer contour cavity 41 and is convenient to break.

Specifically, in order to ensure that the upper die 2 and the bottom die 3 are matched in die assembly, the shape of the forming cavity 4 after die assembly is more accurate, four corners of the bottom die 3 are provided with die assembly positioning grooves 31, and four corners of the upper die 2 are provided with die assembly positioning blocks.

Specifically, oil injection channels are further arranged in the upper die 2 and the bottom die 3, hot oil is injected into the oil injection channels in the powder injection process, and the die is heated.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. The utility model provides a medical tweezers powder injection mold of no thimble seal, includes mould and die block, its characterized in that, it forms the die cavity with the die block compound die to go up the mould, the die cavity is including moulding plastics embryo spare outline die cavity and a plurality of lifting portion die cavity, mould plastics embryo spare outline die cavity and lifting portion die cavity intercommunication setting, lifting portion die cavity is including setting up a plurality of punctiform die cavities and the setting of moulding plastics between the embryo spare outline die cavity of two embryo spare outline die cavities of moulding plastics in moulding plastics embryo spare outline die cavity side, the below of lifting portion die cavity is provided with the thimble hole, can insert the thimble in the thimble hole.

2. The medical tweezer powder injection mold without the thimble print as in claim 1, wherein a plurality of the dot-shaped cavities are respectively arranged outside a plurality of side surfaces of the outer contour cavity of the injection blank, and the intervals between the plurality of dot-shaped cavities on any one side surface are the same.

3. The medical tweezer powder injection mold without the thimble print of claim 1, wherein the diameter of the point-shaped cavity is larger than the diameter of the thimble hole.

4. The medical tweezer powder injection mold without the thimble print of claim 1, wherein a breaking part cavity is arranged at the connection part of the lifting part cavity and the injection blank outer contour cavity.

5. The medical tweezer powder injection mold without the thimble print according to claim 1, wherein mold closing positioning grooves are arranged at four corners of the bottom mold.

6. The medical tweezer powder injection mold without the thimble print according to claim 1, further comprising an upper mold fixing plate, a bottom mold fixing plate, a guide post, and a thimble fixing plate, wherein the upper end of the guide post is fixed on the upper mold fixing plate, the lower end of the guide post is fixed on the bottom mold fixing plate, the upper mold is fixed below the upper mold fixing plate, the thimble fixing plate is arranged above the bottom mold fixing plate, and the thimble is arranged on the thimble fixing plate.

7. The medical forceps powder injection mold without the thimble print of claim 6, wherein an injection port is formed on the upper mold fixing plate, an injection flow channel is formed in the upper mold, the injection flow channel penetrates through the upper mold, and the injection flow channel is respectively communicated with the injection port and the molding cavity.

8. The medical forceps powder injection mold without the thimble print of claim 1, wherein the upper mold and the bottom mold are further provided with oil injection channels therein.