CN2710792Y

CN2710792Y - Cold box

Info

Publication number: CN2710792Y
Application number: CN 200420028099
Authority: CN
Inventors: 杨林龙
Original assignee: Suzhou Industrial Park Mingzhi Casting Equipment Co ltd
Current assignee: Suzhou Mingzhi Technology Co Ltd
Priority date: 2004-06-15
Filing date: 2004-06-15
Publication date: 2005-07-20
Anticipated expiration: 2014-06-15

Abstract

The utility model discloses a cold box, consisting of an upper core box and a lower core box. When a mold is closed, the space between the upper core box and the lower core box constitutes a sand core slot; the upper core box consists of an upper core box bottom plate, a movable plate, a draw rod and a guide rod which are fixedly connected on the upper core box bottom plate and which penetrate through the movable plate; a limited block is provided on the bottom end of the draw rod; at least a group of sliding demoulding structures are provided on the indent position correspondent to the U-shaped part of the sand core; the sliding demoulding structure consists of a middle block which is fixedly connected with the upper core box bottom plate, and moveable blocks limited by the movable plate on both sides; a guiding chute is provided on a guiding plate fixedly connected with the bottom plate or the middle block; a driving lever which is matched with the guiding chute is provided on both ends of each movable block. The utility model is suitable for manufacturing a sand core with inward bending or protrusion forms, for example, manufacture of the sand core of the air inlet pipe and the discharge pipe for the engines with special forms; therefore the dimensional accuracy of the casting is ensured.

Description

A kind of cold-box

Technical field

The utility model relates to a kind of parts of making casting mold or core sand moulding machine, is specifically related to a kind of cold-box that is used for the core sand forming and hardening.

Background technology

In Foundry Production, the shell core that the sixties have five, successively occur, the hot box process technology, core a few minutes in the core box of heating can harden, but core box is easily deformable because of being heated, and influential to the core size; The triethylamine cold-box process has been invented by nineteen sixty-eight U.S. Ashland company, has realized core sclerosis at normal temperatures, and not only available metal making of mould simultaneously also can use plastics, timber to make; After this, multiple different cold-box process successively having occurred, mainly be that core sand material, binding agent and solid gas are different, and process equipment is basic identical.

In the prior art, cold-box generally is made up of last core box and following core box, be blown into solid gas behind last core box and the following core box matched moulds and make core, behind the forming and hardening, will go up core box and separate, again from ejecting core the core box down, promptly realize the demoulding, for the core of some shape, also may increase mechanism, the demoulding to the left and right sides is provided.But continuous development along with foundry industry, need various difform cores, such as the engine breathing pipe in the auto manufacturing, because the restriction of interior space, the air inlet-outlet pipe that a class U-shaped bending when design, occurred, certain projection is formed to the inside at its top, can't adopt the core box realization demoulding that moves upward; Usually the method that solves this kind situation is, shape split coremaking according to air inlet and exhaust piper, usually be divided into 3 cores, be combined to form an integral sand core then, be lowered to again and water the laggard row cast of mold, so synthetic core is owing to will adopt many grafting, and overall dimensions accuracy deviation is bigger, can't be guaranteed thereby make this core of employing water the casting quality that outpours.

Summary of the invention

The utility model purpose provides a kind ofly can make the cold-box that top has the core of inside bending or convex shape.

For achieving the above object, the technical solution adopted in the utility model is: a kind of cold-box, it is made up of last core box and following core box, between the two space constitutes the core groove during matched moulds, the described core box of going up comprises core box base plate, portable plate, and be fixedly connected on the core box base plate and pass through the pull bar and the guide rod of portable plate, the pull bar bottom is provided with limited block; Interior recessed position corresponding to core U-shaped portion, be provided with at least one group of slip demolding structure, described slip demolding structure comprises the intermediate mass of fixedlying connected with last core box base plate, by the spacing both sides loose piece of portable plate, the guide plate of fixedlying connected with base plate or intermediate mass is provided with guide chute, and described each loose piece two ends are provided with the driving lever that cooperates with guide chute.

Behind last core box and the following core box matched moulds, in its core groove, inject core sand, and be blown into solid gas and make core sand solidify to form core.When the demoulding, last core box base plate at first drives intermediate mass and moves upward, make slot milling between intermediate mass bottom and both sides loose piece bottom, up suitable apart from the time, by guide chute guiding crooked to the inside on the guide plate, the both sides loose piece that has driving lever is to intermediary movements, make loose piece two outsides get out of the way the interior recessed position of core sand U-shaped portion, thereby intermediate mass breaks away from from U-shaped portion with the both sides loose piece, the distance that intermediate mass is at first up can be by changing the direction Position Control of guide chute, when the limited block on the pull bar and portable plate meet, it is up that last core box will drive the movable block continuation, finishes the knockout course of core box.

In the technique scheme, in described guide rod periphery, last core box base plate and be fixed between the spring base on the portable plate and be provided with spring; It mainly is the usefulness that helps base plate to separate with portable plate, and when the demoulding, base plate at first moves upward, and throws off with portable plate, and at this moment, possible both combinations are tighter, and portable plate is followed, and the elastic force of spring can guarantee base plate and portable plate disengagement.

Further technical scheme is to be respectively equipped with 4 described pull bars and 4 described guide rods.

In the technique scheme, be provided with one group of described slip demolding structure, one-tenth mould district and middle connecting portion that wherein said intermediate mass is expanded by the end constitute, the outer shape of described both sides loose piece cooperates with core, inboard shape is when core box is in demoulding position and the intermediate mass form fit, and this is the scheme of the most normal use.

Because the technique scheme utilization, the utility model compared with prior art has following advantage:

1. because the utility model is provided with the slip demolding structure, solved the release problems after the core moulding that has U-shaped portion, thereby can be applicable to make to have curves inwardly or the making of the core of convex shape, and for example the core of the engine air inlet and exhaust piper of special shape is made;

2. the core that adopts the utility model to obtain can global formation, thereby when be used to cast, has overcome the big defective of size and dimension deviation of a plurality of in the past cores combination back generations, has guaranteed the dimensional accuracy of foundry goods.

3. the utility model is simple in structure, finishes the core demoulding automatically, and is easy to operate.

Description of drawings

Accompanying drawing 1 is a structural representation of going up core box among the utility model embodiment one;

Cut-away view when accompanying drawing 2 is the utility model embodiment one matched moulds;

Accompanying drawing 3 is the structural representation of going up among Fig. 2 in the core box knockout course;

Structural representation when accompanying drawing 4 is finished for upward the core box demoulding is approaching among Fig. 2.

Wherein: [1], last core box; [2], following core box; [3], core groove; [4], go up the core box base plate; [5], portable plate; [6], pull bar; [7], guide rod; [8], limited block; [9], intermediate mass; [10], loose piece; [11], guide plate; [12], guide chute; [13], driving lever; [14], spring; [15], the one-tenth mould district of expanding, end; [16], connecting portion; [17], slip demolding structure;

The specific embodiment

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

Embodiment: referring to accompanying drawing 1 to shown in the accompanying drawing 4, a kind of cold-box, especially the core core box of casting of automobile engine breathing pipe, it is made up of last core box 1 and following core box 2, between the two space constitutes core groove 3 during matched moulds, the described core box 1 of going up comprises core box base plate 4, portable plate 5, and be fixedly connected on the core box base plate 4 and pass through 4

pull bars

6 and 4 guide rods 7 of portable plate 5, pull bar 6 bottoms are provided with limited block 8, in described guide rod 7 peripheries, last core box base plate 4 and be fixed between the spring base on the portable plate 5 and be provided with spring 14; Interior recessed position corresponding to core U-shaped portion, be provided with 1 group of slip demolding structure 17, described slip demolding structure 17 comprises the intermediate mass 9 of fixedlying connected with last core box base plate 4, by the spacing both sides loose piece 10 of portable plate 5, the guide plate 11 of fixedlying connected with last core box base plate 4 is provided with guide chute 12; One-tenth mould district 15 and middle connecting portion 16 that described intermediate mass 9 is expanded by the end constitute, the outer shape of described both sides loose piece 10 cooperates with core, inboard shape is when core box is in demoulding position and intermediate mass 9 form fit, and described each loose piece 10 two ends are provided with the driving lever 13 that cooperates with guide chute 12.

In the present embodiment, shown in accompanying drawing 2, the state when be last core box 1 and following core box 2 matched moulds this moment is blown into core sand, and is blown into solid gas, as triethylamine in its core groove 3; When the demoulding, shown in accompanying drawing 3, last core box base plate 4 upwards rises, driving connected intermediate mass 9 with this also moves upward, behind intermediate mass 9 rising certain distances, the both sides loose piece 10 that has driving lever 13 inwardly moves horizontally by the guide chute on the guide plate 11 12, together upwards rises with intermediate mass 9 after merging with intermediate mass 9 again, thereby as shown in Figure 4, realize the demoulding.

Claims

1. cold-box, it is made up of last core box [1] and following core box [2], between the two space constitutes core groove [3] during matched moulds, it is characterized in that: the described core box [1] of going up comprises core box base plate [4], portable plate [5], and being fixedly connected on pull bar [6] and the guide rod [7] that portable plate [5] were gone up and passed through to core box base plate [4], pull bar [6] bottom is provided with limited block [8]; Interior recessed position corresponding to core U-shaped portion, be provided with at least one group of slip demolding structure [17], described slip demolding structure [17] comprises the intermediate mass [9] of fixedlying connected with last core box base plate [4], by the spacing both sides loose piece [10] of portable plate [5], the guide plate [11] of fixedlying connected with base plate or intermediate mass [9] is provided with guide chute [12], and described each loose piece [10] two ends are provided with the driving lever [13] that cooperates with guide chute [12].

2. cold-box according to claim 1 is characterized in that: in described guide rod [7] periphery, and last core box base plate [4] and be fixed between the spring base on the portable plate [5] and be provided with spring [14].

3. cold-box according to claim 2 is characterized in that: be respectively equipped with 4 described pull bars [6] and 4 described guide rods [7].

4. cold-box according to claim 1, it is characterized in that: be provided with one group of described slip demolding structure [17], one-tenth mould district [15] that wherein said intermediate mass [9] is expanded by the end and middle connecting portion [16] constitute, the outer shape of described both sides loose pieces [10] cooperates with core, and inboard shape is when core box is in demoulding position and intermediate mass [9] form fit.