CN211515982U

CN211515982U - Riser sand core structure for manufacturing engine cylinder body

Info

Publication number: CN211515982U
Application number: CN201922208007.3U
Authority: CN
Inventors: 黄波
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-09-18
Anticipated expiration: 2029-12-11

Abstract

The utility model discloses a make rising head psammitolite structure of engine cylinder body, including the rising head core, the up end of rising head core is provided with rising head and exhaust hole, and the lower terminal surface and the cooperation of water jacket core profile of rising head core, its characterized in that are provided with a plurality of sand reduction holes on the up end of rising head core, the sand reduction hole is blind hole structure, and the sand reduction hole equipartition is on the up end of rising head core, the edge of rising head core sinks to form and sinks wall structure. The utility model discloses a set up the desanding hole and sink the wall structure and remove the solid position of inoperative on the rising head core for the dead weight of rising head core lightens by a wide margin, and it has not only effectively solved the big and serious problem of pollution of rising head core smoke output, and it has still practiced thrift the manufacturing cost of rising head core, has overcome the not enough that traditional rising head core exists.

Description

Riser sand core structure for manufacturing engine cylinder body

Technical Field

The utility model relates to an engine cylinder body casting field, in particular to make rising head psammitolite structure of engine cylinder body.

Background

The sand mold for casting the engine cylinder generally comprises a front end surface sand core, a rear end surface sand core, a left shape, a right shape, a bottom plate sand core and a riser sand core. Riser psammitolite is also called the riser core for short, traditional riser core except with each sand mould assembly lock shape, still be provided with the riser on its terminal surface, typically like chinese utility model patent CN207119751U, be provided with on the up end of riser core and emit hole 200 (emit the hole and also called the riser), big square outage hole (in fig. 2, big square hole between emitting hole 200 is square outage hole) and little square outage hole (in fig. 2, except that big square outage hole, other little square holes are little square outage hole), and simultaneously, in some engine manufacturing enterprises that hold the advanced technology in palm, still be provided with the exhaust hole on the terminal surface of riser core, set up the exhaust hole between little square outage hole promptly, as shown in fig. 1.

The traditional riser core is of a solid structure except the holes, other parts of the traditional riser core are of a solid structure, the dead weight of the riser core is caused to reach more than 7kg due to the existence of more solid parts, the whole sand mold is not only inconvenient to carry and produce due to overweight, the manufacturing cost is high due to excessive sand consumption due to the overweight riser core, and meanwhile, the riser core is mainly formed by mixing and curing molding sand and resin, the resin consumption is excessive due to excessive sand consumption, resin in the molding sand is burnt and fuming at high temperature during pouring, flame generated by burning of the sand core due to excessive sand consumption is large and generates dense smoke, the riser core is not beneficial to observing the pouring condition by workers, so that the pouring process is not easy to control, the production environment pollution can be caused, the body health of the operators is seriously damaged, and safety liability accidents are easy to generate.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: aiming at the problems, the lightweight riser sand core structure is provided, and the solid part which does not work on the riser core is removed by arranging the sand reducing hole, so that the dead weight of the riser core is greatly reduced, the problem that the riser core is large in smoke generation amount and serious in pollution can be effectively solved, the manufacturing cost of the riser core can be saved, the pouring process is easier to control, and the defects of the traditional riser core are overcome.

The utility model adopts the technical scheme as follows: the utility model provides a make rising head psammitolite structure of engine cylinder body, includes the rising head core, and the up end of rising head core is provided with rising head and exhaust hole, and the lower terminal surface and the cooperation of jacket core profile of rising head core, its characterized in that are provided with a plurality of sand reduction holes on the up end of rising head core, the sand reduction hole is the blind hole structure, and the sand reduction hole equipartition is on the up end of rising head core, the edge of rising head core sinks to form and sinks the wall structure.

Further, the sunken wall structure comprises a sunken edge, and a lock-shaped structure for sand core assembly is arranged on the sunken edge.

Furthermore, the sinking edge is of a concave-convex structure which is fluctuated up and down along the edge of the dead head core.

Further, the sand reduction holes comprise first sand reduction holes, and the first sand reduction holes are arranged between the exhaust holes and the risers.

Further, the sand-reducing holes comprise second sand-reducing holes, and the second sand-reducing holes are arranged between the exhaust holes and the edges of the riser core.

Further, the rising head core and the end face sand core are tightly matched through the profile clamping structure, the profile clamping structure comprises a clamping protrusion and a clamping groove which are matched with each other, the clamping protrusion is arranged on the end face sand core, and the clamping groove is arranged on the rising head core.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that: the utility model discloses a setting up the desanding hole and sinking the wall structure and removing the solid position of inoperative on the rising head core, make the dead weight of rising head core alleviate by a wide margin, its dead weight can reduce 1/3 at least, such setting has not only effectively solved the big and serious problem of pollution of rising head core smoke production volume, it has still practiced thrift the manufacturing cost of rising head core, and then indirectly improved the profit of enterprise by a wide margin, and simultaneously, the obvious reduction of smoke production volume, make the pouring process change control, the foundry goods quality can obtain effective guarantee, overcome the not enough that traditional rising head core exists.

Drawings

FIG. 1 is a schematic three-dimensional structure of a riser core for a conventional manufacturing engine block;

FIG. 2 is a schematic view of the lower end face structure of the conventional riser core;

fig. 3 is a schematic diagram of a three-dimensional structure of a riser sand core of the present invention;

FIG. 4 is another perspective of the riser core of FIG. 3;

FIG. 5 is a schematic view of the configuration of the upper end surface of the riser core of FIG. 3;

FIG. 6 is a schematic view of the configuration of the lower end surface of the riser core of FIG. 3;

fig. 7 is a schematic view of a structure of a sinking wall of the present invention;

fig. 8 is a schematic view of the riser core assembly of the present invention;

fig. 9 shows another embodiment of the present invention.

The labels in the figure are: 1 is the rising head core, 2 is the rising head, 3 is the exhaust hole, 4 is square outage, 5 is circular outage, 6 is first desanding hole, 7 is the second desanding hole, 8 is first sand mould connecting portion, 9 is the body frame structure, 10 is second sand mould connecting portion, 11 is the heavy limit, 12 is the joint recess, 13 is the joint arch, 14 is the terminal surface psammitolite, 15 is the sprue.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Taking a four-cylinder engine cylinder as an example, as shown in fig. 1 and 2, a riser 2 and an exhaust hole 3 are arranged on the upper end surface of a riser core 1 of a sand mold of a traditional cylinder, a molded surface matched with the shape of a water jacket core and the shape of the upper end surface of a cylinder hole is arranged on the lower end surface of the riser core, and both the riser 2 and the exhaust hole 3 on the riser core 1 penetrate through the riser core 1. The thickness of the riser core 1 of the traditional four-cylinder engine cylinder body reaches more than 86mm, the width reaches more than 150mm, and the length reaches more than 400mm, except for the riser 2 and the exhaust hole 3, the riser core is basically a solid body, which causes the dead weight of the riser core 1 to reach more than 7kg, which not only results in the whole sand mold being too heavy to be conveniently transported and produced, but also results in a large amount of sand to be used and a high manufacturing cost, and at the same time, most importantly, because the riser core 1 is formed by mixing and solidifying molding sand and resin, too much sand can cause too much resin, when in casting, the resin in the molding sand is burnt and fuming at high temperature, the excessive sand consumption causes the burning flame of the sand core to be larger and generates dense smoke, the method is not only not beneficial to workers to observe the pouring condition, but also can cause production environment pollution, seriously harms the body health of the operators and is easy to generate safety liability accidents.

Therefore, in order to solve the problem of the existing riser core 1, the utility model discloses the people has made the improvement to it, as shown in fig. 3-6, the utility model discloses a riser core lies in with the difference of traditional riser core, the utility model discloses it subtracts sand structural design to have done riser core 1. The utility model discloses the people discovers after studying traditional rising head core 1's structure, and traditional rising head core 1 has too many unnecessary sand mould packing volume, does not play the solid part of effect promptly, consequently, under the circumstances that guarantees that rising head core 1 has sufficient intensity, the utility model discloses all designed the sand reduction hole between rising head 2 and exhaust hole 3, the so-called sand reduction hole is the recess of having got rid of the molding sand promptly, and the sand reduction hole does not run through the rising head core, and it belongs to the blind hole structure to prevent that the sand reduction hole from influencing the profile that terminal surface formed under rising head core 1. Specifically, as shown in fig. 3-5, a first sand-reducing hole 6 is arranged on the riser core 1, a first sand-reducing hole 6 is arranged between the riser 2 of the cylinder hole and the exhaust hole 3 of the water jacket core positioned at two ends of the riser core, and a second sand-reducing hole 7 is arranged between the exhaust hole 3 and the periphery of the riser core 1, so that the first sand-reducing hole 6 and the second sand-reducing hole 7 are distributed on the upper end surface of the riser core 1, the arrangement of the first sand-reducing hole 6 and the second sand-reducing hole 7 enables the self weight of the riser core 1 to be at least reduced by 1/3, namely, the amount of molding sand above 2kg is at least reduced, the sand-reducing effect is significant, the problem that the riser core is serious in pollution due to large smoke generation amount is effectively solved, the manufacturing cost of the riser core is also significantly saved, the material cost of a single riser core is saved by more than 10 yuan (in terms of precoat.

Furthermore, the sand-reducing hole designed by the utility model can not only bring the technical effect of reducing the amount of molding sand directly, but also play the additional technical effect of preventing molten iron from overflowing, taking the first sand-reducing hole 6 as an example, the first sand-reducing hole 6 is arranged between the riser 2 and the exhaust hole 3, when the pouring is finished, the molten metal overflowing from the riser 2 flows along the end surface of the riser core 1 because the molten metal is still in a liquid state, thus not only the exhaust hole 3 is blocked by the molten metal, but also the excessive molten metal directly flows outside the sand mold to cause safety accidents, the existence of the first sand-reducing hole 6 causes the molten metal flowing on the end surface of the riser core 1 to flow into the first sand-reducing hole 6, thereby preventing the molten metal from flowing to the exhaust hole 3 to block the exhaust hole 3 on the one hand, on the other hand, preventing the molten metal from further flowing, and limiting the flow of the molten metal in the sand-reducing hole, thereby eliminating the adverse effects of the sagging metal.

Further, when designing the sand reducing holes, although the sand reducing holes are irregular holes, the areas of the sand reducing holes cannot be too large for reducing sand blindly, taking the sand reducing holes around the risers 2 as an example, if there is no sand structure connected with the main frame structure of the risers 2 around the risers 2, the strength of the sand mold around the risers 2 is too low, and the sand mold is easy to collapse during casting, which is obviously unfavorable for casting production, therefore, a sand mold connecting part with certain strength is preferably arranged around the risers 2, and the sand mold around the risers 2 is connected with the main frame structure 9 of the risers 2 through the first sand mold connecting part 8, so as to provide enough strength for the risers 2. Accordingly, the exhaust holes 3 of the feeder core 1 are arranged in groups, and generally 3 exhaust holes 3 are arranged in groups, and for a group of exhaust holes 3, it is preferable to arrange a second sand mold connecting part 10 with certain strength around the exhaust holes to connect the main frame structure 9 of the feeder core 1, so that the main frame structure has enough strength. In short, the principle that the span and area of the sand-reducing holes should not be too large is to be held when designing the sand-reducing holes, and the structures on the riser core 1 should have enough strength.

Further, the applicant has found in studying how to further reduce the sand consumption of the feeder core 1, that under the condition of ensuring that the feeder core 1 has sufficient strength, the structural design of the edge of the conventional feeder core is redundant, that is, the periphery of the conventional feeder core is basically in a straight-down structure except for a necessary profile matching structure, for this reason, in an embodiment of the present invention, the edge around the feeder core 1 sinks to form a sunk wall structure, as shown in fig. 7, fig. 7 is a partial structural diagram of the feeder core with the sunk wall structure, and partial structures, such as a partial sand mold connecting portion, are omitted, the sunk wall structure includes a sunk edge 11, the height of the sunk edge 11 is lower than the height of the upper end face of the feeder core 1, and the sunk edge 1 is provided with a lock structure for assembly. In fig. 7, the countersink 11 is an annular structure surrounding the feeder core 1 by one circle and having a certain width, the thickness of the countersink 11 is set according to practical conditions, generally 8mm, the height of the countersink 11 is only about 29mm, and the height of the countersink 11 is far lower than the height of the feeder core 1 relative to the thickness of the feeder above 86mm, so that the dead weight of the feeder core 1 can be greatly reduced, and at the same time, the influence on the assembly and use of the feeder core 1 on the design strength of the feeder core 1 is small, the normal use of the feeder core 1 is not disturbed at all, the dead weight of the feeder core 1 is reduced by at least 2kg, the dead weight of the feeder core 1 is reduced by at least 50% in cooperation with the use of the sand reducing holes, and the manufacturing cost of the feeder core 1 is greatly reduced.

Furthermore, the traditional riser core is clamped with the end face sand core of the sand mold by adopting a profile, and considering the factors of convenient molding and processing of the sand core, the matching structure that clamping protrusions are respectively arranged on two end faces of the riser core 1 and clamping grooves are arranged on the end face sand core of the sand core is generally adopted, as shown in the attached drawing 2 of the Chinese utility model CN207119751U, however, the structure has no influence on the traditional vertical casting sand mold adopting a suspension face, but for the riser core 1 provided with the sunk edge 11, the edge of the riser core 1 is not enough for the support provided by the clamping protrusions, when in installation, the shearing force borne by the clamping protrusions is too large and is easy to deform, so that the riser core 1 is not tightly matched with the end face sand core, and a mutual limit matching structure cannot be formed, meanwhile, in the case that the straight runner 15 is arranged on the end face sand core 14, the clamping grooves are undoubtedly arranged on the end face sand core 14, so that the distance between the straight runner 15 and a casting cavity is too, in order to prevent the hot-piercing accident of the molten metal during pouring, the thickness of the end face sand core needs to be thickened, which is obviously not beneficial to the design of the sand reducing structure. For this reason, to above-mentioned two kinds of condition, as an improvement mode, set up joint recess 12 on two terminal surfaces of rising head core, and set up joint arch 13 on the terminal surface psammitolite, to the condition that is provided with heavy limit 11, then directly set up joint recess 11 that has open structure on heavy limit 11, as shown in fig. 7 and fig. 8, such design not only can avoid reducing the distance between sprue and the casting die cavity, it can also bear the shearing force through heavy limit, and then make rising head core closely cooperate with the terminal surface psammitolite, form spacing cooperation structure each other, the adverse effect that traditional cooperation structure brought has effectively been overcome.

When the oil passage core of the sand mold of some engine blocks needs to be extended to be matched with the feeder head core, as an embodiment, the sunken edge 11 is in an up-and-down concave-convex structure along the edge of the feeder head core 1, as shown in fig. 9, and the structure is used for matching the assembly of the oil passage core so as to facilitate the installation of the feeder head core.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a make rising head psammitolite structure of engine cylinder body, includes the rising head core, and the up end of rising head core is provided with rising head and exhaust hole, and the lower terminal surface and the cooperation of jacket core profile of rising head core, its characterized in that are provided with a plurality of sand reduction holes on the up end of rising head core, the sand reduction hole is the blind hole structure, and the sand reduction hole equipartition is on the up end of rising head core, the edge of rising head core sinks to form and sinks the wall structure.

2. The riser core structure for manufacturing an engine block as claimed in claim 1, wherein said countersink structure comprises a countersink having a locking formation for sand core assembly disposed thereon.

3. The sand core structure for manufacturing a riser core of an engine block as claimed in claim 2, wherein said sinking edge has a concavo-convex structure which undulates up and down along the edge of the riser core.

4. The riser core structure for manufacturing an engine block as recited in claim 1 wherein the sand reduction apertures comprise a first sand reduction aperture disposed between the vent aperture and the riser.

5. The riser core structure for manufacturing an engine block as recited in claim 1 wherein the sand reduction hole comprises a second sand reduction hole disposed between the vent hole and the riser core edge.

6. The riser core structure of any one of claims 1 to 5, wherein the riser core and the face core are tightly fitted together by a profile clamping structure, the profile clamping structure comprising a clamping protrusion and a clamping groove, the clamping protrusion and the clamping groove being engaged with each other, the clamping protrusion being provided on the face core, and the clamping groove being provided on the riser core.