A kind of mould
Technical field
The present invention relates to machine casting field shaping technique, particularly relate to a kind of mould.
Background technology
Mould is the instrument that the fluidised material of solidification obtains the frame for movement of the geometry needed.
In metal forming, usually use husky mould, sand mould has the advantages such as cost is lower, easily manufactured; But the husky molded frame for movement made becomes easily infected by the grains of sand, causes the defects such as sand holes; The husky molded frame for movement surface roughness made is comparatively large simultaneously, in precision optical machinery field, the grinding on these surfaces is needed to the cost of at substantial.
Summary of the invention
The object of the present invention is to provide a kind of mould, can not cause the defects such as sand holes, simultaneously surperficial smoother, roughness is low, can adapt to the needs in precision optical machinery field, and grinding cost is low.
The present invention realizes by the following technical solutions.
A kind of mould, comprise metal counterdie, metal patrix and micro-protrusions, micro-protrusions is positioned at the inner surface of metal counterdie and metal patrix; Micro-protrusions is column, and the diameter of micro-protrusions is 200 ~ 800 μm, and micro-protrusions distance is each other 100 ~ 400 μm; The upper surface of micro-protrusions is provided with superminiature projection; Superminiature projection is column, and the diameter of superminiature projection is 50 ~ 200 μm, and the protruding distance each other of the superminiature in same micro-protrusions is 50 ~ 150 μm.
Preferably, the height of micro-protrusions is 200 ~ 800 μm.
Preferably, the height of micro-protrusions is less than 1/1000 of the thickness of metal counterdie.
Preferably, micro-protrusions is uniformly distributed in the inner surface of metal counterdie.
Preferably, the height of superminiature projection is 1/4 ~ 3/4 of micro-protrusions height.
Preferably, superminiature projection is uniformly distributed in the upper surface of micro-protrusions.
Preferably, the protruding circular array of superminiature is uniformly distributed in the upper surface of micro-protrusions.
Preferably, the internal cavities that metal counterdie and metal patrix are formed is the cavity holding spherical structure.
Preferably, the diameter of cavity is 100 ~ 200 times of the thickness of metal counterdie; The thickness of metal counterdie is equal with the thickness of metal patrix.
Preferably, the diameter of cavity is 4 ~ 16mm.
Beneficial effect of the present invention is: a kind of mould, and comprise metal counterdie, metal patrix and micro-protrusions, micro-protrusions is positioned at the inner surface of metal counterdie and metal patrix; Micro-protrusions is column, and the diameter of micro-protrusions is 200 ~ 800 μm, and micro-protrusions distance is each other 100 ~ 400 μm; The upper surface of micro-protrusions is provided with superminiature projection; Superminiature projection is column, and the diameter of superminiature projection is 50 ~ 200 μm, and the protruding distance each other of the superminiature in same micro-protrusions is 50 ~ 150 μm.Be space between each micro-protrusions, between each superminiature projection, be filled with gap gas; In Metal Forming Process, under the acting in conjunction of metal surface tension and miniature clearance air, fluidised form metal can not fill the gap between superminiature projection, but become round and smooth surface texture, make the product that this mould makes, smooth surface, roughness is low, and grinding cost is low; The defects such as sand holes can not be produced simultaneously.
Accompanying drawing explanation
In order to clearer, that the embodiment of the present invention is described effectively technical scheme, the accompanying drawing used required in embodiment is briefly described, self-explantoryly be, accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, without the need to pay creative work prerequisite under, other accompanying drawing can also be made according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of mould of the present invention.
Fig. 2 is the structural representation of the counterdie of a kind of mould of the present invention.
Fig. 3 is the partial enlarged drawing at the A place of Fig. 2 of a kind of mould of the present invention.
In figure:
1-metal counterdie; 2-metal patrix; 3-micro-protrusions; 31-superminiature is protruding.
Detailed description of the invention
The invention provides a kind of mould, in order to make, those of skill in the art are clearer understands the present invention program, and the object enabling the present invention above-mentioned, feature, beneficial effect more understand, understandable, below in conjunction with accompanying drawing 1-3 and detailed description of the invention, the present invention is further detailed explanation.
A kind of mould, comprise metal counterdie 1, metal patrix 2 and micro-protrusions 3, micro-protrusions 3 is positioned at the inner surface of metal counterdie 1 and metal patrix 2; Micro-protrusions 3 is column, and the diameter of micro-protrusions 3 is 200 ~ 800 μm, and micro-protrusions 3 distance is each other 100 ~ 400 μm; The upper surface of micro-protrusions 3 is provided with superminiature projection 31; Superminiature protruding 31 is column, and the diameter of superminiature projection 31 is 50 ~ 200 μm, and the distance each other of the superminiature projection 31 in same micro-protrusions 3 is 50 ~ 150 μm.
Be space between each micro-protrusions 3, between each superminiature projection 31, be filled with gap gas; In Metal Forming Process, under the acting in conjunction of metal surface tension and miniature clearance air, fluidised form metal can not fill the gap between superminiature protruding 31 and micro-protrusions 3, but become round and smooth surface texture, make the product that this mould makes, smooth surface, roughness is low, and grinding cost is low; The defects such as sand holes can not be produced simultaneously.
In the present embodiment, the height of micro-protrusions 3 is 200 ~ 800 μm.
In the present embodiment, the height of micro-protrusions 3 is less than 1/1000 of the thickness of metal counterdie 1.
In the present embodiment, micro-protrusions 3 is uniformly distributed in the inner surface of metal counterdie 1.
In the present embodiment, the height of superminiature projection 31 is 1/4 ~ 3/4 of micro-protrusions 3 height.
In the present embodiment, protruding 31 circular array of superminiature are uniformly distributed in the upper surface of micro-protrusions 3; Optionally, superminiature projection 31 array that also can be square is uniformly distributed in the upper surface of micro-protrusions 3.
In the present embodiment, the internal cavities that metal counterdie 1 and metal patrix 2 are formed is the cavity holding spherical structure.
The diameter of cavity is 150 times of the thickness of metal counterdie 1; Optionally, the diameter of cavity also can be the thickness 100 times of metal counterdie 1 or 200 times.
In the present embodiment, the diameter of cavity is 8mm; The thickness of metal counterdie 1 is equal with the thickness of metal patrix 2.As required, the diameter of cavity also can be 4mm, 10mm or 16mm.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes all will fall within protection scope of the present invention.