CN106111911A

CN106111911A - Complicated core tears core coring method open

Info

Publication number: CN106111911A
Application number: CN201610737879.7A
Authority: CN
Inventors: 王蒙; 曲泽茂
Original assignee: Kocel Machinery Co Ltd
Current assignee: Kocel Machinery Co Ltd
Priority date: 2016-08-26
Filing date: 2016-08-26
Publication date: 2016-11-16
Anticipated expiration: 2036-08-26
Also published as: CN106111911B

Abstract

A kind of complicated core tears core coring method open, comprises the following steps: make the upper die and lower die of core box according to pre-manufactured model；Upper mold is offered some female threads；From back-up sand mouth to back-up sand in core box, back-up sand limit, limit consolidation, after back-up sand, strike off back-up sand mouth；Core hardens；Tear core open；Coring, by arranging female thread in upper mold in the present invention, then the screw rod of coupling is used, described upper mold is raised up to the demoulding along vertical direction by the engagement force acted between the counteracting force of screw rod and screw rod and female thread by the die joint of lower mold, so control upper mold along vertical direction molding by some screw rods, there is not the risk of double swerve, fundamentally stop the risk helping shape structure core destroyed.

Description

Complicated core tears core coring method open

Technical field

The present invention relates to sand casting technical field, particularly relate to a kind of complicated core and tear core coring method open.

Background technology

Coremaking operation is to cast one of topmost operation, the main task of this operation be exactly produce qualified, meet work The core that skill requires, how by core, complete the taking out from core box of the most complex-shaped core is coremaker author Required skill.

Complex-shaped core is all to comprise sand core structure in the upper die and lower die of core box, so by core from core box Complete takes out, and is taken out by core respectively including from upper die and lower die.

Generally, when core hardening reaches the requirement tearing core coring open, use crane to hook the handle of tight upper mold, upper mold sling, Afterwards turn over lower mold, by core take out, during this, for the sand core structure in upper mold more complicated or careful time, due to , there is the uncontrollable factor of double swerve in the less stable of crane so that the core in upper mold is destroyed, thus causes whole Core can not use.

Summary of the invention

The complicated core be necessary to propose a kind of slow molding, stablizing the demoulding tears core coring method open.

A kind of complicated core tears core coring method open, comprises the following steps:

Making core box according to pre-manufactured model, core box includes the upper die and lower die being divided mould by die joint；

Offering some inner bolt holes in upper mold, described some inner bolt holes extend to the inside of upper mold, inner bolt hole from the top of upper mold Low side connect with described die joint, described some inner bolt holes are divided equally and are distributed in described upper mold；

Use stopper to be blocked by described inner bolt hole, enter inner bolt hole with sand during preventing back-up sand；

From back-up sand mouth to back-up sand in core box, back-up sand limit, limit consolidation, after back-up sand, strike off back-up sand mouth；

Core hardens；

Tear core open: take out described stopper, the some screw rods mated with the screw thread of described inner bolt hole are inserted inner bolt hole, makes the end of screw rod Portion contacts with the die joint of lower mold, then synchronizes to screw described some screw rods, makes point mould of the screw rod top down mould from upper mold Move in direction, face, to be acted on the engagement force general between the counteracting force of screw rod and screw rod and inner bolt hole by the die joint of lower mold Described upper mold is lifted along vertical direction；

Coring: upset lower mold, takes out core.

Preferably, in the described step tearing core open, when synchronizing to screw described some screw rods, according to clockwise direction or inverse time Pin direction, screws each screw rod successively, and each screw rod screws a pitch every time, is lifted so that described upper mold is slowly stable Play the demoulding.

By arranging inner bolt hole in upper mold in the present invention, then use the screw rod of coupling, made by the die joint of lower mold Described upper mold is raised up to the demoulding along vertical direction by the engagement force between the counteracting force and screw rod and inner bolt hole of screw rod, So by some screw rods control upper mold along vertical direction molding, there is not the risk of double swerve, fundamentally stop The risk that side shape structure core is destroyed.

Accompanying drawing explanation

Fig. 1 is the structural representation listing a kind of baroque core in core box.

Fig. 2 is the Fig. 1 sectional view along A-A.

In figure: upper mold 10, lower mold 20, die joint 30, handle 40, back-up sand mouth 50, screw rod 60, side shape structure core 70, sand Core main body 80.

Detailed description of the invention

In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by embodiment required use attached Figure is briefly described, it should be apparent that, the accompanying drawing in describing below is some embodiments of the present invention, common for this area From the point of view of technical staff, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

See Fig. 1, Fig. 2, embodiments provide a kind of complicated core and tear core coring method open, according to pre-manufactured model system Making core box, core box includes the upper mold 10 by 30 points of moulds of die joint and lower mold 20；

Offering some inner bolt holes in upper mold 10, described some inner bolt holes extend to the inside of upper mold 10 from the top of upper mold 10, The low side of inner bolt hole connects with described die joint 30, and described some inner bolt holes are evenly distributed in upper mold 10；

From back-up sand mouth 50 to back-up sand in core box, back-up sand limit, limit consolidation, after back-up sand, strike off back-up sand mouth 50；

Core hardens；

Tear core open: take out described stopper, the some screw rods 60 mated with the screw thread of described inner bolt hole are inserted inner bolt hole, makes screw rod 60 Bottom contact with the die joint 30 of lower mold 20, then synchronize screw some screw rods 60, make screw rod 60 from the top of upper mold 10 to The die joint 30 direction motion of lower mold 20, to act on counteracting force and the screw rod 60 of screw rod 60 by the die joint 30 of lower mold 20 And described upper mold 10 is lifted by the engagement force between inner bolt hole along vertical direction；

Coring: upset lower mold 20, takes out core.

Such as, core is structure as shown in Figure 2, all comprises sand core structure, particularly with upper in upper mold 10 and lower mold 20 Sand core structure in mould 10 is elongated and to the internal side shape structure core 70 extended of upper mold 10, is core main body in lower mold 20 80, side shape structure core 70 and core main body 80 constitute whole core, belong to an entirety of connection, if this structure is direct Upper mold 10 is pulled up by the handle 40 using crane to catch on upper mold 10, due to rocking of suspension arm of crane, drives upper mold 10 also to rock, shakes Dynamic upper mold 10 produces cross shear to the side shape structure core 70 of its inside, makes side shape structure core 70 and core main body 80 Between, especially side shape structure core 70 root crack, even side shape structure core 70 is broken disconnected, thus causes core Scrap.

The method using the present invention, some screw rods 60 slowly synchronize to move upward, upper mold 10 are vertically lifted, and upper mold 10 is not The side shape structure core 70 of its inside can be produced shearing force, after being lifted certain altitude to upper mold 10, on slinging with crane Mould 10 is also born away.

Further, in the described step tearing core open, when synchronizing to screw some screw rods 60, according to clockwise direction or counterclockwise Direction, screws each screw rod 60 successively, and each screw rod 60 screws a pitch every time, is lifted so that upper mold 10 is slowly stable Play the demoulding.Wherein, pitch refers to the axial distance between first tooth of screw thread and second tooth.

Step in embodiment of the present invention method can carry out order according to actual needs and adjust, merges and delete.

The above disclosed present pre-ferred embodiments that is only, can not limit the right model of the present invention with this certainly Enclose, one of ordinary skill in the art will appreciate that all or part of flow process realizing above-described embodiment, and want according to right of the present invention Seek made equivalent variations, still fall within the scope that invention is contained.

Claims

1. a complicated core tears core coring method open, it is characterised in that comprise the following steps:

Offering some inner bolt holes in upper mold, described some inner bolt holes extend to the inside of upper mold, inner bolt hole from the top of upper mold Low side connect with described die joint, described some inner bolt holes are evenly distributed in described upper mold；

Core hardens；

Coring: upset lower mold, takes out core.

2. a kind of complicated core as claimed in claim 1 tears core coring method open, it is characterised in that: in the described step tearing core open In, when synchronizing to screw described some screw rods, according to clockwise or counterclockwise, screw each screw rod successively, each Individual screw rod screws a pitch every time, so that described upper mold is the most stably lifted the demoulding.