CN2098339U - Precision diecasting mold for making thin walled complex casing - Google Patents

Abstract

The utility model relates to a precision die-casting mould for making thin walled complex casing parts. The mould cavities and the mould cores used for molding precision sections by a die-casting mould are designed without draft, the head section of the mold core and the mouths of the mould cavity can be processed with a pulling light band of which two sides are provided with transitioning chamfers and combined reasonably with a mould emptier composed of a top plate, a push pipe, and an a push rod ejector mechanism. The non-ferrous metal component parts of thin walled complex casing processed by the utility model can meet the requirements of precision and surface roughness without mechanical working. The utility model can save a large quantity of energy resources, equipment, and labor force. The utility model can be used in electromechanical manufacture industry.

Description

Precision diecasting mold for making thin walled complex casing

The utility model relates to a kind of microdiecast mould, particularly a kind of microdiecast mould of making the complex thin-wall housing part.

In conventional fabrication processes, for the processing of complex thin-wall housing part (as windshield wiper device housing), be to cast the blank that allowance is arranged earlier, be processed into required precision and surface roughness requirement by the machining operation again.Because repeatedly processing has increased processing cost, the process complexity.

The purpose of this utility model is to overcome that die casting also leaves this weak point of allowance in the prior art, provide a kind of be applicable to various non-ferrous metal complex thin-wall housings in addition part, only need through die casting and deburring operation, just can reach the precision that general machined preface can reach and the microdiecast mould of surface roughness requirement.

The realization the technical solution of the utility model is: used die cavity or the core in the accurate position of (1) die casting moulding all is not with draw taper; (2) core or the die cavity consistent with the die sinking direction, mould emptier adopts push pipe to eject, top board ejects or top board, push pipe, push rod associating ejecting mechanism, with inconsistent core of die sinking direction or die cavity, mould emptier adopts the secondary core-pulling mechanism that foundry goods is had the rest effect; (3) can be processed with the light belt that draws of two sideband transition chamferings at core head, die cavity middle part.The section configuration of core or die cavity can be circular, square, also can be the special-shaped face.The utility model can improve the foundry goods precision by to the applying in a flexible way and making up of above mechanism and structure, and reaches the purpose of not having cutting or few cutting.

Accompanying drawing has provided realizes a kind of concrete structure of the present utility model.

Fig. 1 is a kind of windshield wiper device housing part sketch.

Fig. 2 is the microdiecast die structure dwg of processing part shown in Figure 1.

Fig. 3 is the medium-sized core head structure chart of mould.

In Fig. 1:

(1) the outer bus of left semicircle, (2) left side step conical surface profile,

(3) the anti-scraper ring hole of left side reinforcement, (4) bearing emptying aperture (5),

(6) via hole, big of (7) housing inner chamber, (8) large end face,

(9) housing intracavity sidewall, (10) housing outer surface,

(11) the center circle conical surface, (12) axle bush hole,

(13) peripheral taper seat, (14) thread Pilot hole,

(15) right side reinforcement, (16) right side step conical surface profile,

(17) the outer bus of right semi-circle, (18) planar annular,

(19) seam cylindrical, (20) planar annular, (21) taper seat,

(22) taper seat, (23) taper seat.

In Fig. 2:

(1) mould pin, (2) push rod pressing plate, (3) push rod plate,

(4) push rod, (5) briquetting, (6) core,

(7) dynamic model cage plate, (8) moving die insert,

(9) core, (10) push pipe, (11) cover half cage plate,

(12) fixed die insert, (13) edge cover, (14) core,

(15) cover half pressing plate, (16) core, (17) outer slide,

(18) insert, (19) inner slide, (20) screw rod,

(21) pad, (22) spring, (23) baffle plate,

(24) core, (25) circle latching, (26) brace,

(27) dynamic model pressing plate.

In Fig. 3:

(1) core of no draw taper, (2) transition chamfering,

(3) draw light belt, (4) transition chamfering.

Given embodiment further specifies the CONSTRUCTED SPECIFICATION of the present utility model and the course of work below in conjunction with accompanying drawing.

The utility model is taked the ladder somatotype according to the A-A die joint among Fig. 1 to foundry goods, to guarantee carrying out smoothly of Fig. 1 medium casting large end face (8) straight and demoulding partly.In Fig. 2,, form by moving die insert among Fig. 2 (8) for the large end face among Fig. 1 (8), left semicircle outside line (1), left side step conical surface profile (2), left side reinforcement (3) position; For the housing outer surface among Fig. 1 (10), the center circle conical surface (11), peripheral taper seat (13), right side reinforcement (15), right side step conical surface profile (16), outer bus (17) position of right semi-circle, form by fixed die insert among Fig. 2 (12); For the thread Pilot hole among Fig. 1 (14) position, form by core among Fig. 2 (14), in order to remove boring from, core is not with draw taper; For the position, axle bush hole (12) among Fig. 1, form by core among Fig. 2 (6), because axle bush hole (12) is the mating holes of h8,3.2 class precisions, in order to remove bore hole from, core designs is processed with suitable width for no draw taper and core head, diameter strengthens in right amount, the core that draws light belt (3) (referring to Fig. 3) of two sideband transition chamferings (2), (4); For the bearing emptying aperture (4) among Fig. 1, anti-scraper ring hole (5), via hole (6) position, by among Fig. 2 not the core (24) with draw taper forms, core (24) also has the light belt that draws of two sideband transition chamferings; For the planar annular among Fig. 1 (18), seam cylindrical (19), planar annular (20), taper seat (21), (22), (23) position, form by core among Fig. 2 (16), because of the outer garden (19) of seam among Fig. 1 requires quality of fit is h9, so corresponding die cavity is not with draw taper.For guaranteeing that foundry goods is deviate from smoothly and indeformable, in Fig. 2, designed the brace secondary core-pulling mechanism of forming by brace (26), outer slide (27), lock dog (18), inner slide (19), core parts such as (16) for core (24); Designed the push pipe ejecting mechanism of forming by ejector sleeve (10), push rod (4), push rod plate (3), push rod pressing plate (2) etc. for core (6).

The course of work of the present utility model is as follows: this mould is connected with the lathe moving platen by mould pin (1), is connected with the lathe solid plate by solid plate (15).When press casting procedure finishes die sinking, brace (16) drives inner slide (19) and core (24) earlier and outwards moves, the action of loosing core of outer slide (17) and core (16) has been limited on the plane of lock dog this moment (18), make core (16) thus rest the foundry goods side end face core (24) is deviate from smoothly, and guarantee that thin-section casting can not be pulled out of shape or damage; When eliminate in the elongated slot gap that is evacuated to outer slide (17), core (24) has just left foundry goods side direction aperture, when outer slide (17) has also been left on the plane of lock dog (18) (when the action of loosing core is for the first time finished), brace (26) begins to drive outer slide (17) and core (16) is loosed core to foundry goods seam excircle part, until the distance of all loosing core (action of promptly loosing core is for the second time finished), loose core and finish to avoiding inner slide (19) to move, be provided with again by screw rod (20), packing ring (21), still unillustrated straight pin among spring (22) link stopper (23) and Fig. 2, the positioner that screw etc. are formed is to keep the relative position of outer slide (17) and inner slide (19).When moving to machinery or hydraulic pressure die holder after the lathe dynamic model partly continues, push rod pressing plate (2), push rod plate (3), push rod (4) and push pipe (16) all move successively steadily to be released foundry goods from core (6).During mold closing, the ejector sleeve ejecting mechanism of being made up of ejector sleeve (10), push rod (4), push rod plate (3), push rod pressing plate (2) can reset by hydraulic pressure die holder or mechanical return bar; When brace (26) enters outer slide (17), inner slide (19), core (16), core (24) also all move in together, finishes closure up to lock dog (18) locking, mould, sees shown in Figure 2.

Serial microdiecast mould of the present utility model, the non-ferrous metal die casting of can die casting producing the parts of thin-wall casing of various complexity and all size scale, complicated and simple degree varies, foundry goods both can not made machining after the die casting, the good casting top layer that has kept die casting again, its precision and surface roughness all are better than general machining, can make pottery and eliminate a lot of efficient special machine oil (gas) filling devices and production line, can save a large amount of energy, equipment, manpower can be widely used in the dynamo-electric manufacturing.

Claims (1)

1, a kind of microdiecast mould that comprises cover half pressing plate, cover half cage plate, dynamic model pressing plate, mould pin is characterized in that: used die cavity or the core in the accurate position of (1) moulding all is not with draw taper; (2) core or the die cavity consistent with the die sinking direction, mould emptier adopts push pipe to eject, top board ejects or top board, push pipe, push rod associating ejecting mechanism, with inconsistent core of die sinking direction or die cavity, mould emptier adopts the secondary core-pulling mechanism that foundry goods is had the rest effect; (3) core head, die cavity oral area can be processed with the light belt that draws of two sideband transition chamferings.

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