CN114799072A - Feeding head mould of forming combustion chamber and feeding method thereof - Google Patents

Abstract

The invention provides a combustion chamber feeding riser forming die which comprises a first outer die, a second outer die and a top die, wherein the first outer die and the second outer die are symmetrically arranged, a first cavity is formed in the first outer die, the top die is arranged at the tops of the first outer die and the second outer die, and a top die feeding riser communicated with a first arc-shaped groove and a second arc-shaped groove is formed in the top die. The invention has the advantages that: the modified feeding head is placed at the upper part of the fed part of the casting and beside the finally solidified hot node, so that feeding is carried out by using the gravity of the molten aluminum; when the casting is cooled in the casting mould, the thinnest part is firstly solidified, and the contraction of the casting can be compensated by the thicker part nearby; the riser on the top die is the part for compensating the final solidification of the casting, is arranged above the thickest part of the casting, and has the solidification requirement later than the thickest part of the casting, so that the forming quality of the product is higher.

Description

Forming combustion chamber feeding riser die and feeding method thereof

Technical Field

The invention relates to the technical field of piston machining equipment, in particular to a forming combustion chamber feeding head die and a feeding method thereof.

Background

As shown in fig. 4, the previous external mold feeding head 200 is placed on the external mold body 100, and the produced product is prone to shrinkage cavity and shrinkage porosity at the ring groove and the ring bank, mainly because the aluminum water between the aluminum water feeding bag at the head opening at the side of the external mold and the piston is reversely supplemented, the aluminum water in the cavity enters the feeding bag, the aluminum water in the cavity cannot be supplemented in time and is cooled first, and the shrinkage cavity and the shrinkage porosity are prone to being generated.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a feeding head mould of a forming combustion chamber and a feeding method thereof.

The invention solves the technical problems through the following technical means:

the utility model provides a shaping combustion chamber feeding riser mould, includes first external mold, second external mold and top mould, first external mold and second external mold symmetry set up, first die cavity has been seted up to first external mold inside, the second die cavity has been seted up to second external mold inside, first external mold one side is located first die cavity top and has seted up first arc wall, second external mold one side is located second die cavity top and has seted up the second arc wall, the top mould sets up at first external mold and second external mold top, set up the top mould feeding riser of the first arc wall of intercommunication and second arc wall on the top mould.

Preferably, the side walls of the first outer die and the second outer die are provided with air vents communicating the first cavity and the second cavity.

Preferably, the top die feeding head is of an arc structure.

Preferably, the top die feeding head has a section which is the same as the section formed by the first arc-shaped groove and the second arc-shaped groove.

A feeding head mould of a forming combustion chamber and a feeding method thereof comprise the following steps:

s1, casting the cavity without liquid: slowly pouring molten aluminum into the die cavity, wherein the pouring speed is uniform;

s2, pouring liquid in the cavity: when one fourth of the molten aluminum is filled in the mold cavity, the pouring speed is increased, and the whole mold cavity is quickly filled;

s3, pouring a riser part: filling aluminum liquid into the die cavity to the position of a riser, slowing down the pouring speed, and adopting slow pouring until the position of the riser is full;

s4, cooling operation;

and S5, removing the mold.

Preferably, the casting temperature of the aluminum liquid is 750-780 ℃.

Preferably, the outer mold temperature reaches 250 ℃ and casting is started.

Preferably, the cooling operation comprises the steps of:

s1, product molding: after pouring is finished, standing for 120S, and waiting for product molding;

s2, cooling the outer die: after the external mold delays for 40S, water is introduced for 80S for cooling;

s3, cooling the top die: after the top die delay time is 90S, 30S of water is introduced for cooling.

Preferably, the ratio of (A to B) is set to zero.

The invention has the advantages that: the shrinkage cavity and shrinkage porosity of the casting are prevented from being mainly controlled in the solidification sequence of the piston, the casting is gradually solidified according to a certain sequence, and the modified feeding head is placed at the upper part of the fed part of the casting and beside a finally solidified hot node so as to carry out feeding by using the gravity of the molten aluminum; when the casting is cooled in the casting mould, the thinnest part is firstly solidified, and the contraction of the casting can be compensated by the thicker part nearby; the riser on the top die is the part to compensate the final solidification of the casting, the riser is arranged above the thickest part of the casting, the solidification requirement of the riser is later than that of the thickest part of the casting, the molding quality of the product is higher, the damage phenomenon is not easy to generate, and the yield is greatly improved.

Drawings

FIG. 1 is a schematic structural view of a combustion chamber feeding head forming die according to an embodiment of the invention;

FIG. 2 is a top view of a junction of a first outer mold and a second outer mold in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a top mold according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the prior art of the present invention.

Reference numbers in the figures: 10. a first outer mold; 11. a first arc-shaped slot; 12. a first cavity; 13. an air vent; 20. a second outer mold; 21. a second arc-shaped slot; 22. a second cavity; 30. carrying out top die; 31. a top die is used for feeding a shrink head; 100. an outer mold body; 200. and (5) feeding a riser through the external mold.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1 to 3, the mold for feeding riser of a forming combustion chamber in this embodiment includes a first outer mold 10, a second outer mold 20 and a top mold 30, the first outer mold 10 and the second outer mold 20 are symmetrically disposed, a first cavity 12 is disposed inside the first outer mold 10, a second cavity 22 is disposed inside the second outer mold 20, a first arc-shaped groove 11 is disposed at the top of the first cavity 12 on one side of the first outer mold 10, a second arc-shaped groove 21 is disposed at the top of the second cavity 22 on one side of the second outer mold 20, the top mold 30 is disposed at the top of the first outer mold 10 and the second outer mold 20, and a top mold feeding riser 31 communicating the first arc-shaped groove 11 with the second arc-shaped groove 21 is disposed on the top mold 30.

The structure adjusts the feeding head position of the original external mold to the position of the first external mold 10 and the second external mold 20 close to the top, and is matched with the top mold feeding head 31 on the top mold 30, so that the position of the feeding head is adjusted, and the changed feeding head is placed at the upper part of the fed part of the casting and beside the finally solidified hot node, so that the feeding is carried out by using the gravity of the aluminum liquid. When the casting is cooled in the casting mould, the thinnest part is firstly solidified, the contraction of the casting can be compensated by the thicker part nearby, and the later use effect of the formed part is better.

As shown in fig. 1, the side walls of the first outer mold 10 and the second outer mold 20 are provided with air holes 13 communicating the first cavity 12 and the second cavity 22, and the air holes 13 are arranged to facilitate timely exhaust in the casting process.

As shown in fig. 3, the top mold feeding head 31 has an arc-shaped structure.

As shown in fig. 1-2, the top-die feeding head 31 has the same cross section as the cross section formed by both the first arc-shaped groove 11 and the second arc-shaped groove 21.

Through the structure, the aluminum liquid can flow into the aluminum liquid more stably in the adding process, and the adding effect of the aluminum liquid is better.

A feeding head mould of a forming combustion chamber and a feeding method thereof comprise the following steps:

s1, casting the cavity without liquid: slowly pouring molten aluminum into the die cavity, wherein the pouring speed is uniform;

s2, pouring liquid in the cavity: when one fourth of the molten aluminum is filled in the mold cavity, the pouring speed is increased, and the whole mold cavity is quickly filled;

s3, pouring a riser part: filling aluminum liquid into the die cavity to the position of a riser, slowing down the pouring speed, and adopting slow pouring until the position of the riser is full;

s4, cooling operation;

and S5, demolding. .

The casting temperature of the aluminum liquid is 750-780 ℃.

The outer mold temperature reached 250 ℃ and casting was started.

The cooling operation comprises the steps of:

s1, product molding: after pouring is finished, standing for 120S, and waiting for product molding;

s2, cooling the outer die: after the external mold delays for 40S, water is introduced for 80S for cooling;

s3, cooling the top die: after the top die delay time is 90S, 30S of water is introduced for cooling.

The pouring speed is in a rhythm of first slow, then fast and then slow, when pouring is started, no liquid metal exists in the cavity, slow pouring is convenient for discharging gas in the cavity, the injection phenomenon of an ingate is reduced, and secondary inclusion formation is prevented; when the cavity has certain liquid metal, the alloy liquid is poured properly and quickly so as to fill the cavity as soon as possible and avoid cold shut; when the cavity is filled with alloy liquid and is properly and slowly poured, the time for filling the riser part is properly longer, which is beneficial to feeding. The casting temperature of the aluminum liquid is required to be 750-780 ℃, the casting is started when the temperature of the outer die reaches 250 ℃, the molding period of the product is 120S, 80S of water is introduced after the time delay of the outer die is 40S, and 30S of water is introduced after the time delay of the top die is 90S.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. The utility model provides a shaping combustion chamber feeding riser mould which characterized in that: the mold comprises a first outer mold (10), a second outer mold (20) and a top mold (30), wherein the first outer mold (10) and the second outer mold (20) are symmetrically arranged, a first cavity (12) is formed in the first outer mold (10), a second cavity (22) is formed in the second outer mold (20), a first arc-shaped groove (11) is formed in the top of the first cavity (12) on one side of the first outer mold (10), a second arc-shaped groove (21) is formed in the top of the second cavity (22) on one side of the second outer mold (20), the top mold (30) is arranged on the tops of the first outer mold (10) and the second outer mold (20), and a top mold feeding riser (31) communicated with the first arc-shaped groove (11) and the second arc-shaped groove (21) is formed in the top mold (30).

2. The post-feeding riser mold for forming combustion chambers of claim 1, wherein: and air vents (13) communicated with the first cavity (12) and the second cavity (22) are formed in the side walls of the first outer die (10) and the second outer die (20).

3. The post-feeding riser mold for forming combustion chambers of claim 2, wherein: the top die feeding head (31) is of an arc-shaped structure.

4. The post-feeding riser mold for forming combustion chambers of claim 3, wherein: the section of the top die feeding head (31) is the same as the section formed by the first arc-shaped groove (11) and the second arc-shaped groove (21) in total.

5. The feeding method of a combustion chamber feeding head mold as set forth in claim 1, wherein: the method comprises the following steps:

s1, casting the cavity without liquid: slowly pouring molten aluminum into the die cavity, wherein the pouring speed is uniform;

s2, pouring liquid in the cavity: when one fourth of the molten aluminum is filled in the mold cavity, the pouring speed is increased, and the whole mold cavity is quickly filled;

s3, pouring a riser part: filling aluminum liquid into the die cavity to the position of a riser, slowing down the pouring speed, and adopting slow pouring until the position of the riser is full;

s4, cooling operation;

and S5, demolding.

6. The feeding method of a combustion chamber feeding head mold as set forth in claim 5, wherein: the casting temperature of the aluminum liquid is 750-780 ℃.

7. The feeding method of a combustion chamber feeding head mold as set forth in claim 5, wherein: the outer mold temperature reached 250 ℃ and casting was started.

8. The feeding method of a combustion chamber feeding head mold as set forth in claim 5, wherein: the cooling operation comprises the steps of:

s1, product molding: after pouring is finished, standing for 120S, and waiting for product molding;

s2, cooling the outer die: after the external mold delays for 40S, water is introduced for 80S for cooling;

s3, cooling the top die: after the top die delay time is 90S, 30S of water is introduced for cooling.

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