CN205904410U - Mould exhaust structure in motor cast aluminium rotor core die mould - Google Patents

Abstract

The utility model provides a mould exhaust structure in motor cast aluminium rotor core die mould constitutes its characterized in that by well mould overcoat and well mould exhaust inside lining: well mould exhaust inside lining is taken the dovetail and can be passed through dovetail inseparable rectangular components of arc of laminating with well mould overcoat by a plurality of pieces, the exhaust passage is common about the well mould of below on gap between the well mould exhaust inside lining and the well mould overcoat form in mould inner wall exhaust passage, the utility model discloses owing to designed well mould inner wall exhaust passage, the air among the messenger between mould inner wall and the rotor core can in time be discharged.

Description

Motor cast-aluminum rotor iron core compression mod middle mold exhaust structure

Technical field

This utility model is related to motor and manufactures field, specifically, is a kind of casting of the motor for vertical die-casting machine Exhaust structure in the middle mold of aluminum rotor core compression mod.

Background technology

At present, there is larger problem always in domestic cast-aluminum rotor die-casting mold die casting quality, and exhaust mode substantially all adopts Upper mould aluminum fan blade top and balance capital end annular shallow slot aerofluxuss scheme, middle mold part is had except the part being contacted with upper and lower mould Outside several air discharge ducts, mid portion does not have other exhaust structures.Because being die cast as cold chamber die casting, mold temperature is relatively low, in order to pre- Preventing rotor iron core expanded by heating, all leaves gap between middle mold and rotor core, when die casting, aluminium liquid is from rotor core aluminum groove Injection, flows among the gap between middle mold and rotor core from notch simultaneously, does not have air discharge duct because on middle mold inwall, certain Under conditions of, in the case that especially rotor core length is longer, the encirclement of meeting aluminium liquid between middle mold inwall and rotor core The lower confined space forming a large amount of gases of closing, the pressure of this portion gas can substantially reduce being full of of present position aluminum groove Rate, leads to aluminium liquid all can not be full of aluminum groove, reduces conforming product rate.

Content of the invention

In order to solve the problems, such as that in existing cast-aluminum rotor die-casting mold, parting line venting is bad, this utility model provides a kind of motor Cast-aluminum rotor iron core compression mod middle mold exhaust structure.

This utility model taken scheme that solves the above problems is: the row in a kind of middle mold for cast-aluminum rotor die-casting mold Depressed structure, be made up of middle mold overcoat and middle parting line venting liner it is characterised in that: middle parting line venting liner by some pieces of band dovetail grooves and The arc strip composition that can be fitted tightly by dovetail groove with middle mold overcoat, outside the gap between middle parting line venting liner and middle mold The upper and lower exhaust duct of middle mold of set upper and lower collectively constitutes middle mold inwall exhaust passage, when die casting machine piston promotes aluminium liquid to enter from lower mould Fashionable, aluminium liquid, along rotor core mould flowing upwards, promotes the air residing in mould mould motion upwards, when aluminium liquid high speed simultaneously When entering rotor core aluminum groove and middle mold, turbulent flow can be formed, thus being involved in partial air, this partial air can be by middle parting line venting The middle mold inwall exhaust passage that the upper and lower exhaust duct of middle mold of the gap between liner and middle mold overcoat upper and lower collectively constitutes is discharged, Thus reducing the air retaining in foundry goods, improve the die casting quality of motor cast-aluminum rotor.

Brief description

Fig. 1 is the structural representation after this utility model is installed；

Fig. 2 is middle mold exhaust structure schematic diagram of the present utility model.

In figure is labeled as: 1. descend mould；2. go up mould；3. parting line venting liner in；4. middle mold overcoat；5. rotor core；6. middle mold Exhaust duct up and down.

Specific embodiment

Below in conjunction with the accompanying drawings this utility model is further described:

By accompanying drawing as can be seen that this utility model is a kind of motor cast-aluminum rotor iron core compression mod middle mold exhaust structure, This exhaust passage is formed by middle mold overcoat 4 and middle parting line venting liner 3 it is characterised in that: middle parting line venting liner 3 by some pieces band swallows Stern notch and the arc strip composition that can be fitted tightly by dovetail groove with middle mold overcoat 4, the gap between middle parting line venting liner 3 Collectively constitute middle mold inwall exhaust passage with the upper and lower exhaust duct of middle mold 6 of middle mold overcoat 4 upper and lower.

When die casting machine piston promote aluminium liquid enter from lower mould 1 fashionable, aluminium liquid along rotor core 5 upwards mould flowing, promote retain The mould motion upwards of air in mould, because aluminium liquid enters rotor core aluminum groove and middle mold at a high speed, therefore will necessarily form turbulent flow, Thus being involved in partial air, this partial air can be by the gap between middle parting line venting liner 3 and middle mold overcoat 4 upper and lower The middle mold inwall exhaust passage that the upper and lower exhaust duct of mould 6 collectively constitutes is discharged, thus reducing the air retaining in foundry goods, improves electronic The die casting quality of machine cast-aluminum rotor.

Claims (1)

1. the exhaust structure in a kind of motor cast-aluminum rotor iron core compression mod middle mold, by middle mold overcoat and middle parting line venting liner group Become it is characterised in that: middle parting line venting liner is by some pieces of band dovetail grooves and being fitted tightly by dovetail groove with middle mold overcoat Arc strip composition, the gap between middle parting line venting liner is collectively constituted with the upper and lower exhaust duct of middle mold of middle mold overcoat upper and lower Middle mold inwall exhaust passage.