CN1958192A

CN1958192A - Method for preparing integral die for making core

Info

Publication number: CN1958192A
Application number: CN 200510047614
Authority: CN
Inventors: 冯志军; 李立善; 赵连军
Original assignee: Shenyang Research Institute of Foundry Co Ltd
Current assignee: China Academy of Machinery Shenyang Research Institute of Foundry Co Ltd
Priority date: 2005-11-02
Filing date: 2005-11-02
Publication date: 2007-05-09
Anticipated expiration: 2025-11-02
Also published as: CN100444988C

Abstract

A method for preparing an integral core-making mold is to place multiple sand cores of a casting in a mold for making, and the relative position of each sand core during core making is exactly the same as the relative position after the sand core assembly is assembled. The thickness of the cavity partition wall is determined by the thickness of the components of the integral core-making mold, so that the thickness of the cavity partition wall of the casting and the relative shape and size of each partition space in the casting cavity can be very accurately grasped. The advantage of the present invention is that the thickness of the partition wall of the inner cavity of the casting and the relative shape and position dimensions of the separate spaces in the inner cavity of the casting can be precisely controlled. Avoiding dimensional errors caused by multi-sand core assembly is conducive to ensuring the dimensional accuracy of castings, especially complex castings with inclined curved surfaces in the inner cavity of the casting, which separate the inner cavity of the casting into different spaces. The invention reduces the number of core boxes of castings, greatly saves materials and man-hours for making core boxes, greatly reduces the manufacturing cost of core boxes, and also reduces the storage space and handling workload of core boxes.

Description

A kind of method for preparing integral die for making core

(1) technical field

The present invention relates to a kind of preparation method of mold and pattern for casting tool.

(2) background technology

With the foundry goods that sand casting process is produced, the cavity shape of foundry goods is formed by core, according to the cavity shape of foundry goods, by one or more core combinations, constitutes the inner chamber of foundry goods.It all is that each core is made with a core box that common cast casting technological design and core are made, and a foundry goods has a plurality of cores, then makes core respectively by a plurality of core boxes; When casting mold group type, core is located by core print separately, is placed in the casting mold, and the partition wall of core cavity is made of the gap of different cores, and the wall thickness deflection of partition wall is mainly determined by the positioning accuracy of core core print.The inclination curved surface is arranged again in some core cavity, core cavity is separated into different spaces; For this class foundry goods, with common core-making method, the thickness of relative the morpheme size, particularly partition wall of each compartment of core cavity is difficult to guarantee dimensional accuracy; For the high foundry goods of required precision, often need repeatedly to manufacture experimently, repeatedly adjust, could accurately determine the location dimension of core core print; Even so, under the group type, also cannot say for sure to demonstrate,prove the thickness of core cavity partition wall in the core operation.

(3) summary of the invention

The present invention be directed to the problems referred to above, provide a kind of and can improve the foundry goods precision, the preparation method of the integral die for making core that reduces production costs.

The technical scheme that adopts is:

A kind of method for preparing integral die for making core, be a plurality of cores of foundry goods to be placed in the mould make, relative position when playing core after the assembling of the relative position of each core and core group type is identical, the thickness of core cavity partition wall determines that by the component thickness of this integral die for making core the relative morpheme size of the thickness of core cavity partition wall and each compartment of core cavity can very accurate grasp like this.

The invention has the advantages that:

The relative morpheme size of the thickness of core cavity partition wall and each compartment of core cavity can very accurate grasp like this.Avoid many cores group type to cause scale error, help guaranteeing that the inclination curved surface is arranged in the casting dimension accuracy, particularly core cavity, core cavity is separated into the intricate casting of different spaces.The present invention has reduced the core box quantity of foundry goods, has saved the material and the man-hour of making core box greatly, has significantly reduced the core box manufacturing cost, has also reduced core box parking space and handling workload simultaneously.

(4) description of drawings

Fig. 1 is the integral die for making core installation diagram.

Fig. 2 is the schematic diagram of core 1.

Fig. 3 is the schematic diagram of core 2.

Fig. 4 is the schematic diagram of core 3.

Fig. 5 is the schematic diagram of core 4.

Fig. 6 is the schematic diagram of die assembly 5.

Fig. 7 is the schematic diagram of die assembly 6.

Fig. 8 is the schematic diagram of die assembly 7.

Fig. 9 is the schematic diagram of die assembly 8.

Figure 10 is the schematic diagram of die assembly 9.

Figure 11 is the schematic diagram of die assembly 10.

Figure 12 is the schematic diagram of die assembly 11.

(5) specific embodiment

Foundry goods is for approximate barrel-shaped, its inner chamber is with an inner sleeve that independent die cavity is arranged, an opening of inner sleeve is at the bucket sidewall, an end of bucket is stretched out in the other end, little bend pipe of outer bucket and interior cover is not positive circle, is abnormity, according to the shape of this foundry goods, preparation integral die for making core method is: the inner chamber of bucket can be formed by 4 core 1-4, wherein, No. 2 cores form the inner chamber of inner sleeve, and No. 1 core and No. 3 cores are two semi-ring cores, the common annular cavity of forming outer bucket, form the profile of inner sleeve simultaneously, No. 3 core is smaller, in the recessed side of the profile of inner sleeve, No. 1 core is bigger, in the protruding side of the profile of inner sleeve.The bucket wall is inboard to also have a dividing plate, need form the little space that is separated out with a core, Here it is No. 4 cores.By common core mold method for designing, these 4 cores will be made by 4 core boxes, or No. 1 core and No. 3 cores are beaten shared 3 core boxes by a core box.

Carry out the core box mould design of this foundry goods by the present invention, be designed to an one-piece core box, see shown in the accompanying drawing 1 that the composition of core is made up of 4 cores as mentioned above, 4 cores are made at an one-piece core box.One-piece core box is made up of 7 assembly 5-11, assembly 11 is main bodys of core box, form half main inner chamber of foundry goods, assembly 8 is equivalent to the tube wall of the recessed side of foundry goods inner sleeve, form the separation of core 2 and core 3, assembly 9 is equivalent to the tube wall of the protruding side of foundry goods inner sleeve, form the separation of core 2 and core 1, assembly 7 is equivalent to that piece dividing plate of barrel wall inboard, form the separation of core 4 and core 1, assembly 10 is second half of core box main body, forms half main inner chamber in addition of foundry goods, assembly 6 forms foundry goods interior part inner chamber every one of the utmost point, and assembly 5 forms the core print parts.

This routine mould is fit to the manual cold-box no-bake core of making.The using method of this routine mould is first inspection, cleaning mould, the brushing releasing agent; Handle component 8 is installed on the assembly 11, and the fixing means chucking (not shown in figure 1) with common inserts resin sand, adds the core bone, makes core 3, wipes the core exposed surface off along the edge of assembly 8; Shed jig, installation component 9, and chucking add sand, add the core bone, make core 2; Installation component 7 and assembly 10 also block, and add parting compound (can use resin sand two-part mo(u)lding classifying method commonly used) at core 3 exposed surfaces, lay the core bone, add sand sanding core 1; Installation component 6 and assembly 5 are made core 4.By the time the core sclerosis sheds jig, removes assembly 5 and assembly 6 earlier, takes out core 4; Shed assembly 7 and assembly 10 again, take out core 3; Shed assembly 9, take out core 2; Shed assembly 8 and take out core 3.

Claims

1, a kind of method for preparing integral die for making core, it is characterized in that a plurality of cores of foundry goods are placed in the mould that is made of a plurality of die assemblies and make, relative position when playing core after the assembling of the relative position of each core and core group type is identical, and the partition wall that the assembly of the different cores of separation is corresponding with core cavity in the mold cavity is suitable.

2, a kind of method for preparing integral die for making core according to claim 1, it is characterized in that described core cavity is by four cores (1), (2), (3), (4) form, four cores are made at an one-piece core box, one-piece core box is by 7 assemblies (5), (6), (7), (8), (9), (10), (11) form, assembly (11) is the main body of core box, form half main inner chamber of foundry goods, assembly (8) is equivalent to cast the tube wall of the recessed side of assembly inner sleeve, form the separation of core (2) and core (3), assembly (9) is equivalent to the tube wall of the protruding side of foundry goods inner sleeve, form the separation of core (2) and core (1), assembly (7) is equivalent to that piece dividing plate of barrel wall inboard, form the separation of core (4) and core (1), assembly (10) is second half of core box main body, form half main inner chamber in addition of foundry goods, assembly (6) forms the part inner chamber of foundry goods by one of internal partition, assembly (5) forms the core print part, handle component (8) is installed on the assembly (11), with common fixing means chucking, insert resin sand, add the core bone, make core (3), wipe the core exposed surface off along the edge of assembly (8); Shed jig, installation component (9), and chucking add sand, add the core bone, make core (2); Installation component (7) and assembly (10) also block, and add parting compound at core (3) exposed surface, lay the core bone, add sand sanding core (1); Installation component (6) and assembly (5) are made core (4) by the time the core sclerosis sheds jig, remove assembly (5) and assembly (6) earlier, take out core (4); Shed assembly (7) and assembly (10) again, take out core (1); Shed assembly (9), take out core (2); Shed assembly (8) and take out core (3).