CN205236962U

CN205236962U - Whole psammitolite casting mould of hollow dabber of hollow camshaft of overlength

Info

Publication number: CN205236962U
Application number: CN201520994774.0U
Authority: CN
Inventors: 杨善华; 许连鹏; 张玉斌
Original assignee: Shiyan Hongzhao Auto Parts Industry Co Ltd
Current assignee: Shiyan Hongzhao Auto Parts Industry Co Ltd
Priority date: 2015-12-06
Filing date: 2015-12-06
Publication date: 2016-05-18
Anticipated expiration: 2025-12-06

Abstract

The utility model provides a whole psammitolite casting mould of hollow dabber of hollow camshaft of overlength, including the whole psammitolite of last mould, lower mould, resin sand, be equipped with center exhaust hole on the whole psammitolite of resin sand, be certain spacer sleeve along length direction on the whole psammitolite of resin sand and be equipped with a plurality of chaplets, the chaplet stretches out a 3 -5 support arm along the circumferencial direction, and the whole psammitolite of resin sand passes through a plurality of chaplets at the die cavity location support of lower mould, then has put the chill in the lower mould. Adopt the utility model discloses during the pouring, the whole psammitolite of resin sand passes through the chaplet to be supported, and proof strength and rigidity can not loose and fractures, and the chaplet on the whole psammitolite of further resin sand is melted and melts as an organic wholely with hollow dabber to guarantee the casting of hollow dabber, be equipped with the exhaust of central exhaust hole, the die cavity of being convenient for on the whole psammitolite of resin sand. The utility model discloses change the locate mode of whole psammitolite in the lower mould die cavity to realize the hollow dabber casting of the hollow camshaft of overlength, make rejection rate control within 3%.

Description

The hollow core shaft integral sand core casting mould of overlength hollow camshaft

Technical field

The utility model relates to engine cam manufacturing technology field, especially the mandrel integral sand core casting mould of overlength hollow camshaft.

Background technology

Camshaft is one of automobile engine five large cores, and traditional camshaft of car engine manufacture method is mainly to adopt monoblock cast or solid forging cam shaft blank, and then machining is produced. Cast type camshaft mainly contains chilled cast iron, and chilled ductile iron etc. are the main production forms of current automobile camshaft.

In prior art, engine gasoline owner flows factory owner will adopt Cast camshaft, because the reason of technology is generally solid type. The serviceability of camshaft mainly ensures by the material on cam work surface, as long as connecting axle part has certain bending strength, ensure in use not rupture and just meet the requirements, and the bending strength on cast iron top layer will be higher than heart portion, so be cast as hollow structure, meeting first mate weight reduction, intensity is not but significantly reduced, therefore the in the situation that of technical feasibility, main engine plants are more ready to adopt open-core type Cast camshaft.

Particularly adopt the casting hollow camshaft of hollow core shaft, more have superiority aspect, reasonable utilization of materials little in quality and intensity. But the overlength Combined-type hollow camshaft that exceedes 60 centimetres in length is difficult to casting, mainly in the process of casting hollow mandrel, casting mould need to be used resin sand integral sand core, in casting mold cavity, only from two end supports resin sand integral sand core, but the length of resin sand integral sand core is long, intensity and rigidity are low, cause loose and fracture, and hollow core shaft forms burning into sand defect, percent defective is high, and percent defective is at 20-30%.

Summary of the invention

The utility model proposes the hollow core shaft integral sand core casting mould of overlength hollow camshaft, change the locate mode of integral sand core in counterdie die cavity, thereby realize the hollow core shaft casting of overlength hollow camshaft, percent defective is controlled in 3%.

For this reason, the technical solution of the utility model is: the hollow core shaft integral sand core casting mould of overlength hollow camshaft, comprise patrix, counterdie, resin sand integral sand core, the die cavity of patrix and the die cavity of counterdie constitute hollow core shaft die cavity, resin sand integral sand core is placed in counterdie, resin sand integral sand core one end is provided with axial location core print and radial location core print, it is characterized in that: resin sand integral sand core is provided with central row pore, on resin sand integral sand core, be along its length certain intervals and be set with multiple studs, stud along the circumferential direction stretches out 3-5 support arm, resin sand integral sand core is the die cavity positioning supports at counterdie by multiple studs, then in counterdie, be equipped with chill.

The material that described stud adopts is No. 45 steel nickel plating.

Beneficial effect: while adopting the utility model cast, resin sand integral sand core supports by stud, and proof strength and rigidity can be not loose and fracture, further the stud on resin sand integral sand core is melted and fuses into one with hollow core shaft, thereby ensures the casting of hollow core shaft; Resin sand integral sand core is provided with central row pore, is convenient to the exhaust of die cavity. The utility model changes the locate mode of integral sand core in counterdie die cavity, thereby realizes the hollow core shaft casting of overlength hollow camshaft, and percent defective is controlled in 3%.

Brief description of the drawings

Fig. 1 is counterdie and the resin sand integral sand core shape installation diagram in the utility model.

Fig. 2 is the structure chart of resin sand integral sand core in the utility model.

Detailed description of the invention

In conjunction with Fig. 1, shown in Fig. 2, further describe the utility model as follows: the hollow core shaft integral sand core casting mould of overlength hollow camshaft, comprise patrix (not expressing in figure), counterdie 1, resin sand integral sand core 2, chill 3, the die cavity of the die cavity of patrix and counterdie 1 constitutes hollow core shaft die cavity, resin integral sand core 2 is placed in counterdie, chill 3 is arranged on the cam position of hollow core shaft die cavity, resin sand integral sand core 2 one end are provided with axial location core print 5 and radial location core print 4, resin sand integral sand core 2 is provided with central row pore 6, on resin sand integral sand core 2, be along its length certain intervals and be set with 4 studs 3, the material that stud adopts is No. 45 steel nickel plating, stud along the circumferential direction stretches out 3 support arms, resin sand integral sand core is the die cavity positioning supports at counterdie by multiple studs, then in counterdie, be equipped with chill.

Claims

1. the hollow core shaft integral sand core casting mould of overlength hollow camshaft, comprise patrix, counterdie, resin sand integral sand core, the die cavity of patrix and the die cavity of counterdie constitute hollow core shaft die cavity, resin sand integral sand core is placed in counterdie, resin sand integral sand core one end is provided with axial location core print and radial location core print, it is characterized in that: resin sand integral sand core is provided with central row pore, on resin sand integral sand core, be along its length certain intervals and be set with multiple studs, stud along the circumferential direction stretches out 3-5 support arm, resin sand integral sand core is the die cavity positioning supports at counterdie by multiple studs, then in counterdie, be equipped with chill.

2. the hollow core shaft integral sand core casting mould of overlength hollow camshaft according to claim 1, is characterized in that: the material that stud adopts is No. 45 steel nickel plating.