CN209753941U - inner core mold with contraction function - Google Patents
inner core mold with contraction function Download PDFInfo
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- CN209753941U CN209753941U CN201822277298.7U CN201822277298U CN209753941U CN 209753941 U CN209753941 U CN 209753941U CN 201822277298 U CN201822277298 U CN 201822277298U CN 209753941 U CN209753941 U CN 209753941U
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- main pin
- guide rail
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Abstract
The utility model relates to an interior mandrel with shrink function makes reciprocal linear motion along its axis through the swizzle, makes first guide rail and second guide rail on its lateral wall drive respectively first mandrel and second mandrel are followed reciprocating linear motion is radially made to the swizzle. The utility model can contract inwards when the casting is demoulded, and can demould smoothly without setting a draft casting, thus solving the problems of too low cooling speed and large machining allowance caused by too thick casting due to draft process problem of the deep cavity casting; in addition, the utility model can ensure that the first core mould is contracted more quickly than the second core mould, thereby ensuring that the first core mould and the second core mould are not locked during the contraction process, and ensuring the contraction process to be smoother; the included angle formed by the outer end surface of the side wall of the second core mould and the radial direction of the corresponding second guide rail is 85-105 degrees, so that the first core mould and the second core mould can be ensured not to generate interference when being contracted, and the contraction function can be better realized.
Description
Technical Field
the utility model relates to a foundry goods casting technical field especially relates to an interior mandrel with contraction work ability.
Background
In the casting process of industrial castings, the inner cavity of the casting is formed by a metal core mold, and the casting process has the advantages of high forming precision, high cooling speed and repeated use. However, the greatest disadvantage is that the casting generally needs a draft angle of 3 ° to be smoothly demoulded during demoulding, which also causes the problem that the inner cavity of the casting is too thick. In specific calculation, when the depth of the inner cavity of the casting is increased by 100mm, the thickness of the inner cavity must be increased by 5.25mm correspondingly; therefore, when the inner cavity thickness of the casting is too thick, the problems that the solidification speed of the casting is slow, the machining allowance is large, the surface dense layer cannot be removed and the like are caused, and the casting quality of the casting is reduced.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims at overcoming prior art's is not enough, provides an interior mandrel with contraction work ability, and its mandrel can inwards shrink when the foundry goods drawing of patterns, need not set up pattern draft foundry goods alright demolding smoothly, has solved the deep cavity foundry goods and has aroused the cooling rate that the foundry goods leads to because of pattern draft process problem excessively slowly and the big problem of machining allowance.
In order to realize the purpose, the utility model discloses a technical scheme be:
An inner core mold with a contraction function comprises a movable pin, three first core molds and three second core molds; the three first core moulds and the three second core moulds are respectively provided with a first sliding chute and a second sliding chute which are in sliding fit with the first guide rail and the second guide rail;
the outer sides of the three first core moulds and the outer sides of the three second core moulds jointly enclose a cylindrical side face, and the inner sides of the first core moulds and the second core moulds are isolated from the main pin;
the outer end of the side wall of the first core die is in frictional contact with the outer end of the side wall of the second core die, and a gap is formed between the inner end of the side wall of the first core die and the inner end of the side part of the second core die;
And the outer end surface of the side wall of the second mandrel and the radial direction of the corresponding second guide rail form an included angle of 85-105 degrees;
The main pin is of a cylindrical structure;
the first guide rail is composed of a first connecting part and a first sliding block, the first sliding block is of an inclined cylinder structure with a rectangular cross section, the first sliding block is connected with the main pin through the first connecting part, and the axial direction of the first sliding block and the main pin forms an angle of 5-9 degrees along the longitudinal section of the main pin;
The second guide rail is composed of a second connecting part and a second sliding block, the second sliding block is of an inclined cylinder structure with a rectangular cross section, the second sliding block is connected with the main pin through the second connecting part and forms a 2-4 degree angle with the axial direction of the main pin along the longitudinal section of the main pin.
Further, on the longitudinal section of the main pin, the section of the first connecting part is in a right-angled trapezoid shape; the inner surface of the first sliding block is arranged on the inclined surface of the first connecting part;
on the longitudinal section of the main pin, the section of the second connecting part is in a right-angled trapezoid shape; the inner surface of the second slider is arranged on the inclined surface of the second connecting part.
Further, the outer surface of the first sliding block is in friction contact with the first sliding groove, and a gap is formed between the inner surface of the first sliding block and the first sliding groove;
The outer face of the second sliding block and the second sliding groove form a gap, and the inner face of the second sliding block is in friction contact with the second sliding groove.
From this, can not contract with conventional mandrel and compare, the utility model discloses an interior mandrel with contractile function, when the foundry goods pouring and solidify, its diameter size is unanimous with the inner chamber size of foundry goods, and when the foundry goods drawing of patterns, it makes first mandrel and second mandrel internal contraction to drive first guide rail and second guide rail through the swizzle, need not additionally to set up drawing die inclination foundry goods and just can go out the mould smoothly, therefore, the inner chamber of foundry goods can realize few processing allowance, and the solidification time of foundry goods can shorten the third, so the surface compact layer can obtain furthest's reservation also owing to reduced the processing allowance for the foundry goods. Furthermore, the utility model discloses simple structure, the commonality is strong, and the cast of specially adapted new energy automobile driving motor shell and automobile wheel hub is made to can also extend other dark chamber profile shapes.
Moreover, the included angle formed by the outer end surface of the side wall of the second core mould and the radial direction of the corresponding second guide rail is 85-105 degrees, so that the first core mould and the second core mould can be ensured not to generate interference when being contracted, and the contraction function can be better realized; the included angle formed by the first sliding block and the main pin in the axial direction is larger than the included angle formed by the second sliding block and the main pin in the axial direction, so that the first core die can be ensured to be contracted more quickly than the second core die, the first core die and the second core die cannot be locked mutually in the contraction process, and the contraction process is smoother.
Drawings
Fig. 1 is a schematic structural view of an inner core mold with a shrinking function according to the present invention;
Fig. 2 is an internal view of the inner core mold with a shrinking function according to the present invention;
Fig. 3 is a plan view of the inner core mold having a shrinking function according to the present invention;
Fig. 4 is a sectional view of the movable pin of the inner core mold having a contracting function according to the present invention.
In the figure: 11. a kingpin; 12. a first guide rail; 121. a first connection portion; 122. a first slider; 13. a second guide rail; 131. a second connecting portion; 132. a second slider; 2. a first core mold; 21. a first chute; 22. the outer end of the side wall of the first core mold; 23. the inner end of the side wall of the first core mold; 3. a second core mold; 31. a second chute; 32. the outer end of the side wall of the second core mold; 33. the inner end of the side wall of the second core mold; alpha, an included angle formed by the outer end surface of the side wall of the second mandrel and the radial direction of the corresponding second guide rail; beta, an included angle is formed between the first sliding block and the main pin in the axial direction; gamma, and an included angle formed by the second sliding block and the axial direction of the main pin.
Detailed Description
to further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible implementations and advantages of the present invention.
Please refer to fig. 1 to fig. 4; fig. 1 is a schematic structural view of an inner core mold having a shrinking function according to the present invention, fig. 2 is a schematic internal view of the inner core mold having a shrinking function, and fig. 3 is a plan view of the inner core mold having a shrinking function; fig. 4 is a sectional view of the movable pin of the inner core mold having a contracting function according to the present invention.
An inner core mold with a contraction function comprises a movable pin, three first core molds 2 and three second core molds 3; the movable pin comprises a main pin 11 and three first guide rails 12 and three second guide rails 13 which are arranged on the side wall of the main pin in a staggered manner along the radial direction of the main pin, and the three first core dies 2 and the three second core dies 3 are respectively provided with a first sliding chute 21 and a second sliding chute 31 which are in sliding fit with the first guide rails 12 and the second guide rails 13;
the outer side surfaces of the three first core moulds 2 and the outer side surfaces of the three second core moulds 3 jointly enclose a cylindrical side surface, and the inner sides of the first core moulds 2 and the second core moulds 3 are isolated from the main pin;
The outer side wall end 22 of the first core mould is in friction contact with the outer side wall end 32 of the second core mould, and a gap is formed between the inner side wall end 23 of the first core mould and the inner side wall end 33 of the second core mould;
and the outer end face 32 of the second core mold side wall and the radial direction of the corresponding second guide rail 13 form an included angle of 85-105 degrees; the preferred embodiment is 96 °;
the main pin 11 is of a cylindrical structure;
the first guide rail 12 is composed of a first connecting portion 121 and a first slider 122, the first slider 122 is an oblique cylinder structure with a rectangular cross section, the first slider 122 is connected with the main pin 11 through the first connecting portion 121, and along a longitudinal section of the main pin 11, the axial direction of the first slider 122 and the axial direction of the main pin 11 form an angle of 5 to 9 degrees, and the preferred angle of the embodiment is 6 degrees;
the second guide rail 13 is composed of a second connecting portion 131 and a second slider 132, the second slider 132 is an oblique cylinder structure with a rectangular cross section, the second slider 132 is connected with the main pin 11 through the second connecting portion 131, and along a longitudinal section of the main pin 11, an axial direction of the second slider 132 and the main pin 11 forms an angle of 2 ° to 4 °, and preferably 2 ° in this embodiment.
specifically, in a longitudinal section of the kingpin 11, the first connection portion 121 has a right-angled trapezoidal shape in cross section; the inner surface of the first slider is disposed on the inclined surface of the first connection portion 121;
the second connecting portion 131 has a right trapezoid shape in cross section in the vertical section of the kingpin; the inner surface of the second slider is disposed on the inclined surface of the second connecting portion 131.
Specifically, the outer face of the first slider is in frictional contact with the first slide groove 21, and the inner face thereof forms a gap with the first slide groove 21;
The outer surface of the second slider forms a gap with the second slide groove 31, and the inner surface thereof is in frictional contact with the second slide groove 31.
The working principle of the inner core mold with the shrinking function of the present invention is explained as follows:
When pouring and casting solidification, the diameter size of the circumference surrounded by the first core mould 2 and the second core mould 3 is consistent with the size of the inner cavity of the casting, the movable pin, the first core mould 2 and the second core mould 3 are mutually locked, the outer end 22 of the side wall of the first core mould is in friction contact with the outer end 32 of the side wall of the second core mould, the outer surface of the first slide block is in friction contact with the first chute 21, and the inner surface of the second slide block is in friction contact with the second chute 31; during demolding, the main pin 11 drives the first guide rail 12 and the second guide rail 13 to move axially, so that the first sliding block 122 and the second sliding block 132 respectively slide in the first sliding groove 21 and the second sliding groove 31 relatively, the first core mold 2 and the second core mold 3 further contract inwards, and smooth demolding can be realized without additionally arranging a draft angle casting.
compare with conventional mandrel can not contract, the utility model discloses an interior mandrel with contractile function, when the foundry goods pouring and solidify, its diameter size is unanimous with the inner chamber size of foundry goods, and when the foundry goods drawing of patterns, it makes first mandrel and the inside shrink of second mandrel to drive first guide rail and second guide rail through the swizzle, need not additionally to set up drawing die inclination foundry goods and just can go out the mould smoothly, consequently, the inner chamber of foundry goods can realize few machining allowance, concrete data changes into 3 mm's machining allowance from original 15 mm's machining allowance, and the setting time of foundry goods can shorten the third, so the compact layer in surface can obtain furthest's reservation also owing to reduced the machining allowance for the foundry goods. Furthermore, the utility model discloses simple structure, the commonality is strong, and the cast of specially adapted new energy automobile driving motor shell and automobile wheel hub is made to can also extend other dark chamber profile shapes.
In addition, the inner core mold with the contraction function of the utility model has the advantages that the included angle alpha formed by the outer end surface of the side wall of the second core mold and the radial direction of the corresponding second guide rail is 96 degrees, so that the first core mold and the second core mold can be ensured not to generate interference when being contracted, and the contraction function can be better realized; the included angle beta formed by the first sliding block and the main pin in the axial direction is 6 degrees, the included angle gamma formed by the second sliding block and the main pin in the axial direction is 2 degrees, the first core die can be ensured to be contracted more quickly than the second core die, and therefore the first core die and the second core die cannot be locked mutually in the contraction process, and the contraction process is smoother.
the above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the inner core mold with the shrinking function. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (3)
1. An inner core mold with a contraction function is characterized in that: comprises a movable pin, three first core moulds and three second core moulds; the three first core moulds and the three second core moulds are respectively provided with a first sliding chute and a second sliding chute which are in sliding fit with the first guide rail and the second guide rail;
the outer sides of the three first core moulds and the outer sides of the three second core moulds jointly enclose a cylindrical side face, and the inner sides of the first core moulds and the second core moulds are isolated from the main pin;
the outer end of the side wall of the first core die is in frictional contact with the outer end of the side wall of the second core die, and a gap is formed between the inner end of the side wall of the first core die and the inner end of the side part of the second core die;
and the outer end surface of the side wall of the second mandrel and the radial direction of the corresponding second guide rail form an included angle of 85-105 degrees;
The main pin is of a cylindrical structure;
the first guide rail is composed of a first connecting part and a first sliding block, the first sliding block is of an inclined cylinder structure with a rectangular cross section, the first sliding block is connected with the main pin through the first connecting part, and the axial direction of the first sliding block and the main pin forms an angle of 5-9 degrees along the longitudinal section of the main pin;
the second guide rail is composed of a second connecting part and a second sliding block, the second sliding block is of an inclined cylinder structure with a rectangular cross section, the second sliding block is connected with the main pin through the second connecting part and forms a 2-4 degree angle with the axial direction of the main pin along the longitudinal section of the main pin.
2. The inner core mold having a contracting function according to claim 1, wherein:
On the longitudinal section of the main pin, the section of the first connecting part is in a right-angled trapezoid shape; the inner surface of the first sliding block is arranged on the inclined surface of the first connecting part;
On the longitudinal section of the main pin, the section of the second connecting part is in a right-angled trapezoid shape; the inner surface of the second slider is arranged on the inclined surface of the second connecting part.
3. the inner core mold having a contracting function according to claim 2, wherein:
the outer surface of the first sliding block is in frictional contact with the first sliding groove, and a gap is formed between the inner surface of the first sliding block and the first sliding groove;
The outer face of the second sliding block and the second sliding groove form a gap, and the inner face of the second sliding block is in friction contact with the second sliding groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822277298.7U CN209753941U (en) | 2018-12-29 | 2018-12-29 | inner core mold with contraction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822277298.7U CN209753941U (en) | 2018-12-29 | 2018-12-29 | inner core mold with contraction function |
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| Publication Number | Publication Date |
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| CN209753941U true CN209753941U (en) | 2019-12-10 |
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| CN201822277298.7U Active CN209753941U (en) | 2018-12-29 | 2018-12-29 | inner core mold with contraction function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434028A (en) * | 2018-12-29 | 2019-03-08 | 广东肇庆动力金属股份有限公司 | A kind of inner core die with contractile function |
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2018
- 2018-12-29 CN CN201822277298.7U patent/CN209753941U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434028A (en) * | 2018-12-29 | 2019-03-08 | 广东肇庆动力金属股份有限公司 | A kind of inner core die with contractile function |
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