CN211803675U - Cold core box capable of shortening hardness of gas - Google Patents
Cold core box capable of shortening hardness of gas Download PDFInfo
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- CN211803675U CN211803675U CN202020228519.6U CN202020228519U CN211803675U CN 211803675 U CN211803675 U CN 211803675U CN 202020228519 U CN202020228519 U CN 202020228519U CN 211803675 U CN211803675 U CN 211803675U
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Abstract
The utility model discloses a cold core box capable of shortening hardness of air, which comprises an upper core box and a lower core box, wherein the upper core box is provided with a sand shooting hole, the cold core box also comprises an air bar, the inside of the air bar is provided with an air cavity, the front part of the air bar is provided with an exhaust plug, the side wall of the air bar is provided with a plurality of air narrow slits, and the width of the air narrow slits is 0.15-0.3 mm; the upper core box is provided with a plurality of air ducts and air outlets, and the air bars are combined on the air ducts and distributed in a sand core inner cavity formed by the upper core box and the lower core box. Adopt the utility model discloses it is effectual, shorten the curing time to carry out the system sand solidification.
Description
Technical Field
The utility model relates to a sand core box technical field, concretely relates to hard cold core box of reducible gas.
Background
During the casting process, the complex areas and cavities of the casting are often formed by sand cores. The air hardening cold core box method is a method for making sand core, and is characterized by that under the condition of room temp., the sand grain, resin component I (phenolic resin) and resin component II (polyisocyanate) are uniformly mixed according to a certain proportion, then injected into metal core box, then the amine (triethylamine) gas catalyst is blown into the core box, under the action of catalyst the reaction rate of resin component I and component II is accelerated, and reacted to produce solid adhesive, and the sand grain is adhered together by adhesive to form sand block so as to obtain the strength meeting the requirements of demoulding and conveying. The time for bonding and integrally forming the strength of all the sands in the whole core box is called as curing time, the curing time is longer when the sand core is thicker, and the curing time of the sand core with the local thickness of 200mm reaches more than 300 seconds. The external shape structure of the engine cylinder block casting is very complex, the core is manufactured by a gas-hardening cold box method, the local depth of the sand core exceeds 200mm, the sand core at the deepest part of the core setting box is poorly cured, and the time required for complete curing exceeds 300 seconds. Poor curing is often easy to occur, the curing time is too long, and the production efficiency is low.
The above background disclosure is only provided to aid in understanding the concepts and technical solutions of the present invention, and it does not necessarily belong to the prior art of the present patent application, and it should not be used to assess the novelty and inventive step of the present application without explicit evidence that the above content has been disclosed at the filing date of the present patent application.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to above-mentioned technical problem provide a solidification is effectual, shorten the gas hard cold core box of curing time.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a cold core box capable of shortening hardness of air comprises an upper core box and a lower core box, wherein the upper core box is provided with a sand shooting hole, the cold core box also comprises an air bar, the inside of the air bar is provided with an air cavity, the front part of the air bar is provided with an exhaust plug, the side wall of the air bar is provided with a plurality of air narrow slits, and the width of the air narrow slits is 0.15-0.3 mm; the upper core box is provided with a plurality of air ducts and air outlets, and the air bars are combined on the air ducts and distributed in a sand core inner cavity formed by the upper core box and the lower core box.
Furthermore, the air duct encircles the periphery of the sand shooting hole and is distributed in a circle, a plurality of exhaust ports are further arranged on the periphery of the air duct, and exhaust plugs are further arranged on the exhaust ports.
Furthermore, the upper part of the ventilation rod is also provided with a circle of air return grooves, and the air return grooves are radially provided with vent holes.
Furthermore, the air vent bar is connected with the upper core box through threads, and a gap of 0.15-0.3 mm is reserved between the lower edge of the air return groove and the inner side surface of the upper core box.
Furthermore, the ventilation narrow slit is longitudinally arranged.
The utility model has the advantages of compared with the prior art: the sand core box has the advantages that the ventilation bars are arranged along the periphery of the sand shooting hole, other ventilation channels are combined to realize quick and uniform exhaust, sand materials can be better and uniformly shot, and the use effect is good particularly for the sand core box with irregular and deep sand core configuration; the air-breather that is equipped with simple structure can realize exhausting and letting in gaseous catalyst function at the system sand in-process, to the dark psammitolite of degree of depth, can show the setting time that reduces, excellent in use effect.
Drawings
FIG. 1 is a schematic view of the assembled structure of the present invention;
fig. 2 is a schematic structural view of the air bar of the present invention;
fig. 3 is a schematic structural view of the joint between the air-breather rod and the upper core box of the present invention.
Detailed Description
As shown in fig. 1 to 3, a cold core box capable of shortening air hardness comprises an upper core box 1 and a lower core box 2, wherein the upper core box is provided with sand shooting holes 1-4, and further comprises an air bar 3, the air bar 3 has the functions of air exhaust and air follow-up in operation, an air cavity 3-1 is arranged in the air bar 3, an air plug 3-5 is arranged at the front part of the air bar 3, a plurality of air narrow slits 3-4 are arranged on the side wall of the air bar, the air narrow slits 3-4 are longitudinally arranged, and the width of the air narrow slits 3-4 is 0.15-0.3 mm; the upper core box 1 is provided with a plurality of air ducts 1-3 and exhaust ports 1-1, the air bars 3 are combined on the air ducts 1-3 and distributed in the inner cavity of the sand core formed by the upper core box 1 and the lower core box 2, and the distribution positions of the air bars 3 are certainly on the back side of the sand core, which is not contacted with molten iron. In the embodiment, the air passages 1-3 are distributed around the peripheries of the sand shooting holes 1-4 in a circle, a plurality of air outlets 1-1 are further arranged on the peripheries of the air passages 1-3, and air exhaust plugs 1-2 are further arranged on the air outlets. The upper part of the air bar 3 is also provided with a circle of air return grooves 3-3, and the air return grooves 3-3 are radially provided with vent holes 3-2. The vent bar 3 is connected with the upper core box 1 through threads 3-6, and a gap 4 of 0.15-0.3 mm is reserved between the lower edge of the air return groove 3-3 and the inner side surface of the upper core box. When the air blowing hardening is carried out, the sand core solidification around the root of the air breather rod is facilitated, and meanwhile, the sand core hardening rate can be improved and the preparation effect can be improved when the high-density sand core is prepared.
Claims (5)
1. The utility model provides a cold core box that can shorten gas hard, includes upper core box and lower core box, the sand shooting hole has been seted up to the upper core box, its characterized in that: the ventilation device is characterized by further comprising a ventilation rod, wherein a ventilation inner cavity is formed in the ventilation rod, an exhaust plug is arranged at the front part of the ventilation rod, a plurality of ventilation narrow slits are formed in the side wall of the ventilation rod, and the width of each ventilation narrow slit is 0.15-0.3 mm; the upper core box is provided with a plurality of air ducts and air outlets, and the air bars are combined on the air ducts and distributed in a sand core inner cavity formed by the upper core box and the lower core box.
2. A collapsible vapor-curable cold box as set forth in claim 1 wherein: the air duct surrounds the periphery of the sand shooting hole and is distributed in a circle, a plurality of exhaust ports are further arranged on the periphery of the air duct, and exhaust plugs are further arranged on the exhaust ports.
3. A collapsible vapor-curable cold box as set forth in claim 1 wherein: the upper part of the air bar is also provided with a circle of air return grooves, and the air return grooves are radially provided with vent holes.
4. A collapsible gas hard cold box according to claim 3, characterised in that: the air vent rod is connected with the upper core box through threads, and a gap of 0.15-0.3 mm is reserved between the lower edge of the air return groove and the inner side surface of the upper core box.
5. A collapsible vapor-curable cold box as set forth in claim 1 wherein: the ventilation narrow slit is longitudinally arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020228519.6U CN211803675U (en) | 2020-02-28 | 2020-02-28 | Cold core box capable of shortening hardness of gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020228519.6U CN211803675U (en) | 2020-02-28 | 2020-02-28 | Cold core box capable of shortening hardness of gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211803675U true CN211803675U (en) | 2020-10-30 |
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ID=72997412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020228519.6U Active CN211803675U (en) | 2020-02-28 | 2020-02-28 | Cold core box capable of shortening hardness of gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211803675U (en) |
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2020
- 2020-02-28 CN CN202020228519.6U patent/CN211803675U/en active Active
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