CN111375732A - Core making method of barrel type casting - Google Patents
Core making method of barrel type casting Download PDFInfo
- Publication number
- CN111375732A CN111375732A CN202010482045.2A CN202010482045A CN111375732A CN 111375732 A CN111375732 A CN 111375732A CN 202010482045 A CN202010482045 A CN 202010482045A CN 111375732 A CN111375732 A CN 111375732A
- Authority
- CN
- China
- Prior art keywords
- core
- pattern
- chill
- conformal
- sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005266 casting Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000004576 sand Substances 0.000 claims abstract description 8
- 210000000988 bone and bone Anatomy 0.000 claims description 9
- 230000001680 brushing effect Effects 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 6
- 229910052742 iron Inorganic materials 0.000 claims 3
- 239000000843 powder Substances 0.000 description 5
- 239000006260 foam Substances 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002026 carminative effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
- B22D15/04—Machines or apparatus for chill casting
Abstract
The invention relates to the technical field of casting, in particular to a core making method of a barrel type casting, which comprises a core box, a shape-following chilling block on the inner wall of the barrel type casting and a hollow core bar with holes, wherein the core box is provided with an integrated shape-following chilling block and a pattern of an air outlet hole, the height of the shape-following chilling block pattern is larger than the thickness of the shape-following chilling block, and the core making step comprises the steps of assembling the core box, filling sand, coring and assembling the chilling block. The cavity required by the concession of the sand core is formed through the pattern, the operation is convenient, the environment is protected, the energy is saved, the cavity is communicated with the air outlet hole and the hollow core frame, the gas in the cavity and the sand core can be discharged in time, and the quality of the casting is ensured.
Description
Technical Field
The invention belongs to the technical field of casting, and particularly relates to a core making method of a barrel casting.
Background
In sand casting production, because the casting wall thickness is uneven, need use the chill to the chilling of thick wall position usually to guarantee the whole quality of casting, in some section of thick bamboo type castings, because of its special structure, often will set up the chill at the inner wall of a section of thick bamboo, and the inner chamber of section of thick bamboo type casting is again through the shaping of psammitolite again, if the deformability of psammitolite is not enough, when using the chill at the inner wall, the chill can hinder the shrink of molten metal and cause the casting to produce the crackle, worsen the casting quality. In order to solve the problems, in the prior art, core making materials with good collapsibility, such as sawdust, coal powder and the like, are usually placed on the back of a chill, and a foam board or a straw rope and the like are also embedded in the middle of a sand core, so that the sand core is combusted and volatilized at high temperature to form a cavity, and the deformability of the sand core is improved. Although these methods are used more often, they have the following disadvantages: (1) sawmilling powder, coal powder or foam boards and the like are disposable and can not be recycled; (2) the combustion and volatilization of the substances can generate a large amount of gas, and the gas generated by the substances which are easily volatilized and easily burnt, such as water, organic matters and the like originally contained in the sand core can seriously obstruct the filling of molten metal if the gas cannot be discharged in time, so that the defects of insufficient pouring, cold shut and the like are easily generated; (3) sawmilling powder or foam board can generate large peculiar smell when burning, and the production environment is worsened. Therefore, how to use the chill on the inner wall of the barrel casting, ensure enough deformability of the sand core without generating cracks, and lead out gas from the cavity and the sand core in time is needed to be solved.
Disclosure of Invention
The present invention is directed to solving the above-mentioned problems and deficiencies of the prior art and to providing a method for making a core for a barrel casting.
The technical scheme of the invention is as follows: a core making method of barrel castings comprises a core box, a chilling block and a hollow core bone with holes, wherein the chilling block is a direct external chilling block and is a conformal chilling block on the inner wall of the barrel castings, a mold sample of the conformal chilling block and an air outlet hole is arranged on the core box, the mold sample is assembled on the core box in a loose piece mode, the mold sample of the conformal chilling block and the air outlet hole are integrated, the height of the mold sample of the conformal chilling block is larger than the thickness of the conformal chilling block, and the core making comprises the following steps:
step a: assembling a core box, namely assembling the integrated conformal chill and the vent hole pattern on the core box, and putting a hollow core bone with holes into the core box to enable the holes on the hollow core bone to be contacted with the top end of the vent hole pattern;
step b: brushing a layer of coating for casting on the core box and the pattern, filling sand, and filling the core box with self-hardening sand;
step c: after the sand core is hardened to meet the coring requirement, the core box is disassembled, and the integrated conformal chill and the vent hole pattern are taken out;
step d: and (4) clamping the conformal chill into the cavity on the sand core, and brushing the casting coating on the outer surfaces of the sand core and the chill.
According to the core making method of the barrel type casting, the draft angle of the shape-following chill pattern of the integrated shape-following chill and the vent hole pattern is 15-45 degrees.
According to the core making method of the barrel casting, the draft angle of the vent hole pattern of the integrated conformal chill and the vent hole pattern is 2-5 degrees.
The invention has the beneficial effects that: the cavity with the depth larger than the thickness of the conformal chill is manufactured in the sand core by using the conformal chill mold, and the cavity is formed on the back of the chill after the conformal chill is clamped, so that the cavity is manufactured in a mechanical mode, no gas and no taste are generated, and the production environment is good; the core making method does not use a disposable foam board, coal powder and the like, thereby being energy-saving and environment-friendly; the integrative shape-following chill and venthole pattern make the cavity at the back of the chill after the shaping be linked together with the venthole, and the venthole is also linked together with the hole on the hollow core bone, and the gas that produces in the psammitolite in the die cavity that can be convenient in time draws out, when improving the psammitolite give up nature, can also play carminative effect.
Drawings
Fig. 1 is a schematic structural diagram of a core box of the present invention.
Fig. 2 is a schematic vertical cross-section of the sand core of the present invention.
Fig. 3 is a schematic horizontal cross-section of the sand core of the present invention.
In the above drawings, names of the reference numerals correspond to the following components:
1-hollow core, 2-core box, 3-integrated conformal chill and vent hole pattern, 4-sand core, 5-conformal chill, 6-cavity, 7-vent hole and 8-cavity.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, it is obvious that the described examples are a part of the examples of the present invention, and not all of them, and on the basis of the examples of the present invention, all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present invention.
The specific embodiment is as follows: as shown in figure 1, the core making method of the cylinder type casting comprises a core box 2, a chilling block and a hollow core bone 1 with a hole, wherein the chilling block is a direct external chilling block and is a shape-following chilling block 5 on the inner wall of the cylinder type casting, a shape-following chilling block 5 and a pattern of an air outlet hole 7 are arranged on the core box 2, the pattern is assembled on the core box 2 in a loose piece mode, the shape-following chilling block 5 and the pattern of the air outlet hole 7 are integrated, the height of the shape-following chilling block pattern is larger than the thickness of the shape-following chilling block 5, and the top end of the pattern of the air outlet hole is in contact with the hole on the hollow core bone 1. In order to conveniently extract the integrated shape-following chill and the vent hole pattern 3, the draft angle of the shape-following chill pattern can be 15-45 degrees and the draft angle of the vent hole pattern can be 2-5 degrees according to the difference of the sizes of the shape-following chill 5 and the sand core 4. The core making method comprises the following steps:
step a: assembling a core box 2, assembling an integrated conformal chill and a vent hole pattern 3 on the core box 2, and putting a hollow core 1 with holes into the core box to enable the holes on the hollow core 1 to be contacted with the top end of the vent hole pattern;
step b: brushing a layer of coating for casting on the core box 2 and the pattern 3, filling sand, and filling the core box 2 with self-hardening sand;
step c: after the sand core 4 is hardened to meet the coring requirement, the core box is disassembled, and the integrated conformal chill and the vent hole pattern 3 are taken out;
step d: and (3) clamping the conformal chill 5 into a cavity on the sand core 4, and brushing the casting coating on the outer surfaces of the sand core 4 and the chill 5.
After the above-described core-making step is completed, the internal structure of the resulting sand core 4 is shown in fig. 2 and 3. Because the height of the conformal chill mold is greater than the thickness of the conformal chill 5, the conformal chill 5 cannot fill the cavity formed by the mold, and therefore, the cavity 6 is formed on the back of the conformal chill 5, and a yielding space is provided for the shrinkage of the barrel type casting. Simultaneously, venthole die sample top and the hole on the cavity core 1 are the mutual contact during core making, can make the venthole 7 and the hole intercommunication of cavity core 1 that make, and integrative shape-following chill and venthole die sample 3 let cavity 6 and the venthole 7 at the shape-following chill 5 back communicate each other again, therefore gas in die cavity 8 and the psammitolite 4 can be through cavity 6 at the shape-following chill 5 back, venthole 7 and the hole on the cavity core 1, discharge through cavity core 1 again, it is good to exhaust.
Assembling the obtained sand core 2 into a casting mold, then pouring by covering a box, after the casting is cooled, knocking the box and cleaning, taking out the hollow core 1 and the conformal chill 5, and cleaning the residual core sand for the next use.
Claims (3)
1. A core making method of barrel castings comprises a core box, a chilling block and a hollow core bone with holes, wherein the chilling block is a direct external chilling block and is a conformal chilling block on the inner wall of the barrel castings, a pattern of the conformal chilling block and an air outlet hole is arranged on the core box, and the pattern is assembled on the core box in a loose piece mode, and is characterized in that: the shape-following iron chill and the pattern of the air outlet hole are integrated, the height of the shape-following iron chill pattern is greater than the thickness of the shape-following iron chill, and the core making comprises the following steps:
step a: assembling a core box, namely assembling the integrated conformal chill and the vent hole pattern on the core box, and putting a hollow core bone with holes into the core box to enable the holes on the hollow core bone to be contacted with the top end of the vent hole pattern;
step b: brushing a layer of coating for casting on the core box and the pattern, filling sand, and filling the core box with self-hardening sand;
step c: after the sand core is hardened to meet the coring requirement, the core box is disassembled, and the integrated conformal chill and the vent hole pattern are taken out;
step d: and (4) clamping the conformal chill into the cavity on the sand core, and brushing the casting coating on the outer surfaces of the sand core and the chill.
2. The method of claim 1, wherein the draft angle of the conformal chill pattern of the integrated conformal chill and vent pattern is 15 ° -45 °.
3. The method of claim 1, wherein the draft angle of the vent hole pattern of the integrated conformal chill and vent hole pattern is 2 ° -5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010482045.2A CN111375732B (en) | 2020-06-01 | 2020-06-01 | Core making method of barrel type casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010482045.2A CN111375732B (en) | 2020-06-01 | 2020-06-01 | Core making method of barrel type casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111375732A true CN111375732A (en) | 2020-07-07 |
| CN111375732B CN111375732B (en) | 2021-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010482045.2A Active CN111375732B (en) | 2020-06-01 | 2020-06-01 | Core making method of barrel type casting |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112872292A (en) * | 2020-12-30 | 2021-06-01 | 宁波金汇精密铸造有限公司 | Coupler knuckle and manufacturing method thereof, loam core die and coupler knuckle die |
| CN114850419A (en) * | 2022-04-06 | 2022-08-05 | 大冶有色机电设备修造有限公司 | Production method of long-life large-size zinc ingot mold and zinc ingot mold |
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| CN103192030A (en) * | 2013-03-29 | 2013-07-10 | 常州南车汽车零部件有限公司 | Automatic cold iron feeding method and device for vertical split flask-less shoot-squeeze molding line |
| CN103691885A (en) * | 2013-12-05 | 2014-04-02 | 山东省源通机械股份有限公司 | Method for installing chilling block or sand coating iron mould |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112872292B (en) * | 2020-12-30 | 2022-11-25 | 宁波金汇精密铸造有限公司 | Coupler knuckle and manufacturing method thereof, loam core die and coupler knuckle die |
| CN114850419A (en) * | 2022-04-06 | 2022-08-05 | 大冶有色机电设备修造有限公司 | Production method of long-life large-size zinc ingot mold and zinc ingot mold |
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| Publication number | Publication date |
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| CN111375732B (en) | 2021-03-30 |
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Effective date of registration: 20240118 Address after: 123000 No. 1-1, Jianxing street, foundry Park, Fuxin Town, Fumeng County, Fuxin City, Liaoning Province Patentee after: Fuxin Jianxing Metal Co.,Ltd. Address before: 518000 1002, Building A, Zhiyun Industrial Park, No. 13, Huaxing Road, Henglang Community, Longhua District, Shenzhen, Guangdong Province Patentee before: Shenzhen Wanzhida Technology Co.,Ltd. Effective date of registration: 20240118 Address after: 518000 1002, Building A, Zhiyun Industrial Park, No. 13, Huaxing Road, Henglang Community, Longhua District, Shenzhen, Guangdong Province Patentee after: Shenzhen Wanzhida Technology Co.,Ltd. Address before: 610039 No. 999, golden week Road, Chengdu, Sichuan, Jinniu District Patentee before: XIHUA University |