CN202877471U

CN202877471U - Deep-cavity mold hole and metal mold core exhausting core-pulling structure of wax injection mold

Info

Publication number: CN202877471U
Application number: CN 201220424686
Authority: CN
Inventors: 侯敏
Original assignee: Beijing Xinghang Electromechanical Equipment Co Ltd
Current assignee: Aerospace Hiwing Harbin Titanium Industrial Co Ltd
Priority date: 2012-08-24
Filing date: 2012-08-24
Publication date: 2013-04-17
Anticipated expiration: 2022-08-24

Abstract

The utility model discloses a deep-cavity hole metal core-exhausting core-pulling structure of a wax-pressing mold, which comprises a lower mold body, an upper mold body, positioning pins and guide pins, and also includes an inner mold core and an outer mold core. The outer core is in the shape of a stepped shaft with a hole in the center, the thin end is a free end, the thick end has an "L"-shaped through groove, the through groove communicates with the central through hole, and there are several annular grooves outside the thick end; the inner core is one end A cylindrical rod part with a bent handle, the inner core is placed in the through hole or stepped hole of the outer core, and forms a clearance fit with the small diameter hole of the through hole or stepped hole inside the outer core, and the bent handle is placed in the outer core In the "L"-shaped groove; the thin end of the outer core is placed in the groove of the upper mold body and the lower mold body, and the thick end of the outer core is close to the outside of the upper mold body and the lower mold body, and the upper mold body and the lower mold body The body is positioned and assembled with the outer core through positioning pins, and the upper mold body and the lower mold body are positioned and assembled with guide pins. The structure solves the problems of difficult extraction of the metal core and deformation and damage of the wax mold, and improves the quality and quantity of the wax mold.

Description

A kind of pressure wax-pattern tool deep cavity shape mesoporous metal core exhaust pulled core structure

Technical field

The utility model belongs to a kind of pulled core structure, is specifically related to a kind of pressure wax-pattern tool deep cavity shape mesoporous metal core exhaust pulled core structure.

Background technology

At present, often need to press the wax-pattern tool in hot investment casting or the compression moulding foundry goods, when pressing the wax-pattern tool to use, under the effect of wax injector pressure, the wax of melting is injected mold cavity, after the wax cooled and solidified, from mold cavity, take out again wax pattern, at last metallic core is extracted out from wax pattern and formed wax-pattern, but in wax pattern cooled and solidified process, very easily form vacuum chamber at deep cavity shape mesoporous metal core end face, at this moment, be difficult to metallic core is extracted out from wax-pattern, if undue force is easy to make the wax-pattern distortion or wax-pattern is damaged, finally cause the shaping investment pattern rate low.

Summary of the invention

The purpose of this utility model provides a kind of pressure wax-pattern tool deep cavity shape mesoporous metal core exhaust pulled core structure, solves to press wax-pattern tool deep cavity shape mesoporous metal core end face to form vacuum chamber, so that exhaust and the hard problem of loosing core.

The utility model is achieved in that a kind of pressure wax-pattern tool deep cavity shape mesoporous metal core exhaust pulled core structure, comprises lower mold body, upper die body, alignment pin and guide finger, also comprises interior core and outside core.

Described outside core is multidiameter shape, the center has that through hole or diameter are poor to be 0.5mm～1mm shoulder hole, taper end one end is free end, taper end has dowel hole near the butt end position, and the groove of taper end outer mold surface and upper die body and lower mold body is complementary, butt end one end has " L " shape groove, and groove communicates with central through hole, and there are some cannelures in the butt end outside;

Described interior core be an end with the cylindrical rod part of curved handle, interior core places through hole or the shoulder hole of outside core, form matched in clearance with the diameter holes of outside core interior bone or shoulder hole, and curved handle places in outside core " L " the shape groove;

With upper die body and lower mold body matched moulds, the taper end of outside core places the groove of upper die body and lower mold body, and the butt end of outside core is adjacent to upper die body and the lower mold body outside, and upper die body and lower mold body are by alignment pin and outside core orientation assemble, and upper die body and lower mold body are with the guide finger orientation assemble.

The utility model has the advantages that, press in the wax process at mould, owing to adopted the interior core that can extract out, so that the gas in the die cavity can be discharged by the gap of inside and outside core; When loosing core, first interior core is extracted out, air just enters pressure wax-pattern tool from the central through hole of outside core, thereby easily extracts outside core out, has solved metallic core and has extracted problem difficult, the wax-pattern deformed damaged out, has improved quality and the quantity of shaping investment pattern.

Description of drawings

Fig. 1 is a kind of pressure wax-pattern tool deep cavity shape mesoporous metal core exhaust pulled core structure generalized section;

Fig. 2 is a kind of pressure wax-pattern tool deep cavity shape mesoporous metal core exhaust pulled core structure schematic diagram;

Fig. 3 is for pressing the wax-pattern schematic diagram of not yet extracting metallic core out of wax-pattern tool institute moulding.

Among the figure: 1, outside core 2, interior core 3, alignment pin 4, lower mold body 5, upper die body 6, guide finger 7, wax-pattern.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is described in detail:

As shown in Figure 1 and Figure 2, a kind of pressure wax-pattern tool deep cavity shape mesoporous metal core exhaust pulled core structure comprises lower mold body 4, upper die body 5, alignment pin 3 and guide finger 6, also comprises interior core 2 and outside core 1.Outside core 1 is multidiameter shape, the center has diameter poor for the shoulder hole of 0.5mm～1mm, taper end one end is free end, taper end has dowel hole near the butt end position, and the groove of taper end outer mold surface and upper die body 5 and lower mold body 4 is complementary, butt end one end has " L " shape groove, and groove communicates with central through hole, and there are some cannelures in the butt end outside; Interior core 2 be an end with the cylindrical rod part of curved handle, interior core 2 places the through hole of outside core 1, with the diameter holes matched in clearance of the shoulder hole at outside core 1 center, interior core 2 curved handles place in outside core 1 " L " the shape groove.

As shown in Figure 3, occupation mode of the present utility model is as follows, before pressing wax-pattern tool matched moulds, interior core 2 places the through hole of outside core 1, the diameter holes matched in clearance of interior core 2 faces of cylinder and outside core 1 central stepped, reduce the length that cooperates axial plane of outside core 1 and interior core 2, and interior core 2 can slide in the hole, the curved handle of core 2 places in " L " shape translot of outside core 1 simultaneously, make the free end end face of interior core 2 one ends and outside core 1, the interior core 2 and the outside core 1 that assemble are put into lower mold body 4, alignment pin 3 inserts in outside core 1 dowel hole on the lower mold body 4, again with upper die body 5 and lower mold body 4 assemblings, with guide finger 6 location; Behind the matched moulds, the wax of melting is injected die cavity by the casting mouth, form wax-pattern 7 rear die sinkings until the wax pattern cooling.During die sinking, utilize the die cavity that rises on upper die body 5, the lower mold body 4 that upper die body 5 and lower mold body 4 are separated, wax-pattern 7 is taken out together with outside core 1, interior core 2, when loosing core, core 2 in the rotation along core barrel to skidding off outside core 1 chute, is extracted the curved handle of interior core 2 " L " shape out interior core 2, from wax-pattern 7, extract again outside core 1 out, finish the moulding of deep hole.

Claims

1. a deep cavity type hole metal core exhaust core-pulling structure of a wax pressing mold, comprising a lower die body (4), an upper die body (5), positioning pins (3) and guide pins (6), characterized in that It also includes an inner core (2) and an outer core (1), the inner core (2) is placed in the center hole of the outer core (1), and is matched with the center hole of the outer core (1), and The curved handle of the inner core (2) is placed in the "L" shaped groove of the outer core (1).

2. A deep-cavity hole metal core-exhaust core-pulling structure for a wax pressing mold according to claim 1, characterized in that: the outer core (1) is in the shape of a stepped shaft, with a through hole or diameter in the center Step holes with a difference of 0.5mm to 1mm, the thin end is a free end, and there is a positioning pin hole near the thick end at the thin end, and the outer surface of the thin end is in contact with the grooves of the upper mold body (5) and the lower mold body (4) Matching, there is an "L"-shaped through groove at one end of the butt end, the through groove communicates with the central through hole, and there are several annular grooves on the outside of the butt end.

3. A deep-cavity metal core exhaust core-pulling structure for a wax pressing mold according to claim 1, characterized in that: the inner core (2) is a cylindrical rod part with a bent handle at one end .