CN105964907A - Hot-core box precoated sand casting technology of motor end cover - Google Patents

Hot-core box precoated sand casting technology of motor end cover Download PDF

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Publication number
CN105964907A
CN105964907A CN201610428741.9A CN201610428741A CN105964907A CN 105964907 A CN105964907 A CN 105964907A CN 201610428741 A CN201610428741 A CN 201610428741A CN 105964907 A CN105964907 A CN 105964907A
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China
Prior art keywords
sand
core
precoated sand
hot
casting
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Pending
Application number
CN201610428741.9A
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Chinese (zh)
Inventor
宫尚虎
宫尚兵
宫东东
黄庆春
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Hanshan Lin Head Vibration Anhui Casting Factory
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Anhui Hanshan Lin Head Vibration Anhui Casting Factory
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Application filed by Anhui Hanshan Lin Head Vibration Anhui Casting Factory filed Critical Anhui Hanshan Lin Head Vibration Anhui Casting Factory
Priority to CN201610428741.9A priority Critical patent/CN105964907A/en
Publication of CN105964907A publication Critical patent/CN105964907A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/02Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/20Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/20Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
    • B22C1/22Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C7/00Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/06Core boxes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/10Cores; Manufacture or installation of cores
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/22Moulds for peculiarly-shaped castings

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

The invention discloses a hot-core box precoated sand casting technology of a motor end cover. The hot-core box precoated sand casting technology comprises the steps that a mould is mounted on a core shooter in place; precoated sand is put in a hot-core box of the core shooter, a precoated sand core is manufactured, and the temperature of the precoated sand core is controlled, wherein raw sand of the precoated sand is formed by mixing quartz sand and chromite sand; the ready-made sand core is taken out, a hot-core box sand core is assembled and mouded, and is pressed by weights, then casting is carried out with the casting temperature being controlled at 1300-1500 degrees; natural cooling is carried out for 1-2h, and casting pieces are taken out after mould splitting. The hot-core box precoated sand casting technology links orderly and commences from the core sand manufacturing aspect, and can reduce defect products caused because the sand core deforms, shrinks and cracks easily through the improvement on the constitutes of the precoated sand. In addition, the use strength of the core sand prepared by the hot-core box precoated sand casting technology can meet the requirements within two weeks, the use cycle of the core sand is prolonged, and the strength of casting pieces is improved. The wall thickness and strength of the motor end cover cast by the hot-core box precoated sand casting technology can completely reach the use requirements.

Description

A kind of electric motor end cap hot box precoated sand casting technique
Technical field
The invention belongs to conventional casting technologies field, particularly relate to a kind of electric motor end cap hot box precoated sand casting Technique.
Background technology
In recent years occurring in that a kind of hot box precoated sand formative technology, this technique passes through core-shooting device by overlay film Precoated sand inject in the mould heated, precoated sand by heating reach solidification effect.This kind of casting side Formula is easily formed assembly line work, and moulding efficiency is high, and the dependence to workman proficiency level is relatively low, is relatively shaped to This is relatively low, substantially at about 1200 yuan/ton, about moulding efficiency 3 tons of foundry goods/12 hour per capita.Deficiency Place is that die cavity gas forming amount is too big, and owing to the wall thickness of die cavity is between 15-30mm, the gas that die cavity produces is not Easily discharging, cause product pore, the casting flaw such as hollow occur, production process is wayward.
Chinese invention patent (CN103990767A) discloses a kind of hot core shell precoated sand formative technology, this work Skill comprises the following steps successively: core shooting, mould assembling, training sand, vibrations, evacuation, and described core shooting specifically refers to By hot core shell shell molding machine, hot core shell shell molding machine fixes mould, by nozzle and the mould of hot core shell shell molding machine Precoated sand is injected in the most heated mould after aligned by the effect of air pressure by the loophole on tool, waits overlay film Take out after sand hardening, form casting mold blank, control the wall thickness of casting mold blank at 4-5mm;For another example Chinese invention Patent (CN102896299A) discloses the production technology of a kind of film-covering sand hot corebox method casting thin-walled cooker, Comprise the following steps: step one, make hot core box mould according to the shape of cooker, mould is taken out negative pressure knot Structure, and hot core box mould is arranged on core shooter;Step 2, injects hot core box mould, warp by precoated sand Cross electrical heating and make precoated sand curing molding in hot core box mould;Step 3, after core shooter divides mould, removal is middle Template, then matched moulds;Step 4, first starts vacuum source after matched moulds, on core shooter, vacuum source takes out negative pressure While pour into a mould ferrum liquid, in casting process produce gas taken away by vacuum source;Step 5, after foundry goods cooling, Mould is divided to obtain the thin-walled cooker of molding.But above two hot box precoated sand casting technique all cannot meet electricity The production requirement of machine end cap.
Summary of the invention
In order to overcome the defect of prior art, it is an object of the invention to provide a kind of electric motor end cap hot box overlay film Sand casting technique, technique is simple, meets electric motor end cap production requirement.
In order to realize above-mentioned goal of the invention, the present invention by the following technical solutions:
A kind of electric motor end cap hot box precoated sand casting technique, is the most specifically carried out:
Step S101, being arranged on core shooter by mould, installation puts in place;
Step S102, precoated sand is loaded in core shooter hot box, make precoated sand core, core temperature control System is at 220 DEG C-320 DEG C, and wherein the roughing sand of precoated sand is mixed by quartz sand and chromite sand, wherein said It is 3-8% that chromite sand accounts for the mass percent of described quartz sand, adds catalyst, mixing in roughing sand 3-5min, shakes out after adding thermosetting resin mixing 3-6min, and described catalyst charge is quartz chiltern The 0.1-0.3%, the 1.0-2% that addition is quartz sand quality of described thermosetting resin resin of amount;
Step S103, the core taking-up that will make, hot box assembly of sand core molding also presses with foundary weight, then Casting, cast temperature controls at 1300 DEG C-1500 DEG C;
Step S104, to casting after electric motor end cap foundry goods carry out natural cooling, cool time is 1-2 hour, Mould is divided to take out foundry goods.
Further, in step s 102, the granularity of described quartz sand and chromite sand is 50~100 mesh.
Further, in step s 102, constituent and the part by weight thereof of described catalyst is: chlorination Ammonium 5-10%, ammonium carbonate 10-20%, carbamide 20-35%, deionized water 35-50%.
Further, in step s 102, constituent and the weight ratio thereof of described thermosetting resin is: Bonding agent 90-95%, reinforcing agent 2-3.5%, peroxide initiator 1.5-5.5%, described vinyl silanes increases One in strong agent, resin enhancers, silane coupler.
Compared with prior art, provide the benefit that: the technique linking of the present invention is orderly, in terms of core sand making Set about, by improving the composition of precoated sand, can reduce core because being easily deformed, shrinkage cavity, cracking cause Bad, the core sand of present invention preparation simultaneously used intensity all to meet requirement in two weeks, extended making of core sand With the cycle, improve the intensity of foundry goods;The present invention is had to cast the electric motor end cap obtained, wall thickness and intensity complete Reach to use requirement.
Detailed description of the invention
The most just come electric motor end cap hot box precoated sand casting technique of the present invention by this embodiment be given Illustrative.
Embodiment 1
A kind of electric motor end cap hot box precoated sand casting technique, is the most specifically carried out:
Step S101, being arranged on core shooter by mould, installation puts in place;
Step S102, precoated sand is loaded in core shooter hot box, make precoated sand core, core temperature control System is at 320 DEG C, and wherein the roughing sand of precoated sand is mixed by quartz sand and chromite sand, described quartz sand and chromium The granularity of iron ore is 50~100 mesh, and wherein said chromite sand accounts for the mass percent of described quartz sand It is 8%, in roughing sand, adds catalyst, mix 5min, shake out after adding thermosetting resin mixing 6min, Described catalyst charge is the 0.1% of quartz sand quality, and the addition of described thermosetting resin resin is quartz The 1.0% of chiltern amount;
The constituent of described catalyst and part by weight thereof be: ammonium chloride 10%, ammonium carbonate 20%, carbamide 35%, deionized water 35%;
The constituent of described thermosetting resin and weight ratio thereof be: bonding agent 95%, resin enhancers 5.5%, peroxide initiator 5.5%;
Step S103, the core taking-up that will make, hot box assembly of sand core molding also presses with foundary weight, then Casting, cast temperature controls at 1400 DEG C;
Step S104, to casting after electric motor end cap foundry goods carry out natural cooling, cool time is 1 hour, Mould is divided to take out foundry goods.
Embodiment 2
A kind of electric motor end cap hot box precoated sand casting technique, is the most specifically carried out:
Step S101, being arranged on core shooter by mould, installation puts in place;
Step S102, precoated sand is loaded in core shooter hot box, make precoated sand core, core temperature control System is at 300 DEG C, and wherein the roughing sand of precoated sand is mixed by quartz sand and chromite sand, described quartz sand and chromium The granularity of iron ore is 50~100 mesh, and wherein said chromite sand accounts for the mass percent of described quartz sand It is 4%, in roughing sand, adds catalyst, mix 3min, shake out after adding thermosetting resin mixing 5min, Described catalyst charge is the 0.2% of quartz sand quality, and the addition of described thermosetting resin resin is quartz The 1.5% of chiltern amount;
The constituent of described catalyst and part by weight thereof be: ammonium chloride 10%, ammonium carbonate 15%, carbamide 35%, deionized water 40%;
The constituent of described thermosetting resin and weight ratio thereof be: bonding agent 90%, resin enhancers 5%, peroxide initiator 5%;
Step S103, the core taking-up that will make, hot box assembly of sand core molding also presses with foundary weight, then Casting, cast temperature controls at 1400 DEG C;
Step S104, to casting after electric motor end cap foundry goods carry out natural cooling, cool time is 1 hour, Mould is divided to take out foundry goods.
Embodiment 3
A kind of electric motor end cap hot box precoated sand casting technique, is the most specifically carried out:
Step S101, being arranged on core shooter by mould, installation puts in place;
Step S102, precoated sand is loaded in core shooter hot box, make precoated sand core, core temperature control System is at 250 DEG C, and wherein the roughing sand of precoated sand is mixed by quartz sand and chromite sand, described quartz sand and chromium The granularity of iron ore is 50~100 mesh, and wherein said chromite sand accounts for the mass percent of described quartz sand It is 6%, in roughing sand, adds catalyst, mix 3min, shake out after adding thermosetting resin mixing 5min, Described catalyst charge is the 0.2% of quartz sand quality, and the addition of described thermosetting resin resin is quartz The 1.8% of chiltern amount;
The constituent of described catalyst and part by weight thereof be: ammonium chloride 8%, ammonium carbonate 10%, carbamide 35%, Deionized water 47%;
The constituent of described thermosetting resin and weight ratio thereof be: bonding agent 93%, resin enhancers 3%, peroxide initiator 4%;
Step S103, the core taking-up that will make, hot box assembly of sand core molding also presses with foundary weight, then Casting, cast temperature controls at 1400 DEG C;
Step S104, to casting after electric motor end cap foundry goods carry out natural cooling, cool time is 1 hour, Mould is divided to take out foundry goods.
Embodiment 4
A kind of electric motor end cap hot box precoated sand casting technique, is the most specifically carried out:
Step S101, being arranged on core shooter by mould, installation puts in place;
Step S102, precoated sand is loaded in core shooter hot box, make precoated sand core, core temperature control System is at 220 DEG C, and wherein the roughing sand of precoated sand is mixed by quartz sand and chromite sand, described quartz sand and chromium The granularity of iron ore is 50~100 mesh, and wherein said chromite sand accounts for the mass percent of described quartz sand It is 8%, in roughing sand, adds catalyst, mix 3min, shake out after adding thermosetting resin mixing 5min, Described catalyst charge is the 0.3% of quartz sand quality, and the addition of described thermosetting resin resin is quartz The 2% of chiltern amount;
The constituent of described catalyst and part by weight thereof be: ammonium chloride 10%, ammonium carbonate 15%, carbamide 35%, deionized water 40%;
The constituent of described thermosetting resin and weight ratio thereof be: bonding agent 90%, resin enhancers 5%, peroxide initiator 5%;
Step S103, the core taking-up that will make, hot box assembly of sand core molding also presses with foundary weight, then Casting, cast temperature controls at 1400 DEG C;
Step S104, to casting after electric motor end cap foundry goods carry out natural cooling, cool time is 1 hour, Mould is divided to take out foundry goods.
Embodiment 5
A kind of electric motor end cap hot box precoated sand casting technique, is the most specifically carried out:
Step S101, being arranged on core shooter by mould, installation puts in place;
Step S102, precoated sand is loaded in core shooter hot box, make precoated sand core, core temperature control System is at 320 DEG C, and wherein the roughing sand of precoated sand is mixed by quartz sand and chromite sand, described quartz sand and chromium The granularity of iron ore is 50~100 mesh, and wherein said chromite sand accounts for the mass percent of described quartz sand It is 5%, in roughing sand, adds catalyst, mix 3min, shake out after adding thermosetting resin mixing 5min, Described catalyst charge is the 0.3% of quartz sand quality, and the addition of described thermosetting resin resin is quartz The 1.5% of chiltern amount;
The constituent of described catalyst and part by weight thereof be: ammonium chloride 5%, ammonium carbonate 20%, carbamide 35%, Deionized water 40%;
The constituent of described thermosetting resin and weight ratio thereof be: bonding agent 92%, resin enhancers 5%, peroxide initiator 3%;
Step S103, the core taking-up that will make, hot box assembly of sand core molding also presses with foundary weight, then Casting, cast temperature controls at 1400 DEG C;
Step S104, to casting after electric motor end cap foundry goods carry out natural cooling, cool time is 1 hour, Mould is divided to take out foundry goods.

Claims (4)

1. an electric motor end cap hot box precoated sand casting technique, it is characterised in that the most specifically enter OK:
Step S101, being arranged on core shooter by mould, installation puts in place;
Step S102, precoated sand is loaded in core shooter hot box, make precoated sand core, core temperature control System is at 220 DEG C-320 DEG C, and wherein the roughing sand of precoated sand is mixed by quartz sand and chromite sand, wherein said It is 3-8% that chromite sand accounts for the mass percent of described quartz sand, adds catalyst, mixing in roughing sand 3-5min, shakes out after adding thermosetting resin mixing 3-6min, and described catalyst charge is quartz chiltern The 0.1-0.3%, the 1.0-2% that addition is quartz sand quality of described thermosetting resin resin of amount;
Step S103, the core taking-up that will make, hot box assembly of sand core molding also presses with foundary weight, then Casting, cast temperature controls at 1300 DEG C-1500 DEG C;
Step S104, to casting after electric motor end cap foundry goods carry out natural cooling, cool time is 1-2 hour, Mould is divided to take out foundry goods.
Electric motor end cap hot box precoated sand casting technique the most according to claim 1, it is characterised in that In step s 102, the granularity of described quartz sand and chromite sand is 50~100 mesh.
Electric motor end cap hot box precoated sand casting technique the most according to claim 1 and 2, its feature exists In, in step s 102, the constituent of described catalyst and part by weight thereof be: ammonium chloride 5-10%, Ammonium carbonate 10-20%, carbamide 20-35%, deionized water 35-50%.
Electric motor end cap hot box precoated sand casting technique the most according to claim 1 and 2, its feature exists In, in step s 102, the constituent of described thermosetting resin and weight ratio thereof be: bonding agent 90-95%, reinforcing agent 2-3.5%, peroxide initiator 1.5-5.5%, described vinyl silanes reinforcing agent, One in resin enhancers, silane coupler.
CN201610428741.9A 2016-06-15 2016-06-15 Hot-core box precoated sand casting technology of motor end cover Pending CN105964907A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107913974A (en) * 2017-12-06 2018-04-17 北京仁创砂业科技有限公司 A kind of steel-casting precoated sand and preparation method thereof
CN108262440A (en) * 2018-04-11 2018-07-10 苏州勤堡精密机械有限公司 The mixture core sand of high heat-resistant high-strength low bulk
CN110434291A (en) * 2019-09-04 2019-11-12 重庆新红旗缸盖制造有限公司 A kind of sand core production method
CN111136223A (en) * 2020-01-07 2020-05-12 浙江精恒铜业股份有限公司 Impeller casting process method
CN111511140A (en) * 2020-05-09 2020-08-07 安徽省含山县林头振皖铸造厂 Low-pressure explosion-proof integrated end cover and manufacturing process thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003019542A (en) * 2001-07-03 2003-01-21 Toyota Central Res & Dev Lab Inc Method for producing mold for casting
CN102974759A (en) * 2012-11-28 2013-03-20 天津市宁河县鑫发工贸有限公司 Pre-coated sand hot core box casting process of small and medium-sized precise parts
CN103084541A (en) * 2013-01-31 2013-05-08 贵州英吉尔机械制造有限公司 Forming technology of air cylinder cover casting
CN103252444A (en) * 2013-04-25 2013-08-21 吴江市液铸液压件铸造有限公司 Hot-box method-based core sand preparation process for core preparation
CN105478677A (en) * 2015-12-01 2016-04-13 济南方德利模具有限公司 Casting technology of engine cylinder cover and core assembling structure
CN105583362A (en) * 2016-02-19 2016-05-18 无锡市凯杰铸造有限公司 Casting method for producing steel casting through precoated sand

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003019542A (en) * 2001-07-03 2003-01-21 Toyota Central Res & Dev Lab Inc Method for producing mold for casting
CN102974759A (en) * 2012-11-28 2013-03-20 天津市宁河县鑫发工贸有限公司 Pre-coated sand hot core box casting process of small and medium-sized precise parts
CN103084541A (en) * 2013-01-31 2013-05-08 贵州英吉尔机械制造有限公司 Forming technology of air cylinder cover casting
CN103252444A (en) * 2013-04-25 2013-08-21 吴江市液铸液压件铸造有限公司 Hot-box method-based core sand preparation process for core preparation
CN105478677A (en) * 2015-12-01 2016-04-13 济南方德利模具有限公司 Casting technology of engine cylinder cover and core assembling structure
CN105583362A (en) * 2016-02-19 2016-05-18 无锡市凯杰铸造有限公司 Casting method for producing steel casting through precoated sand

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107913974A (en) * 2017-12-06 2018-04-17 北京仁创砂业科技有限公司 A kind of steel-casting precoated sand and preparation method thereof
CN108262440A (en) * 2018-04-11 2018-07-10 苏州勤堡精密机械有限公司 The mixture core sand of high heat-resistant high-strength low bulk
CN110434291A (en) * 2019-09-04 2019-11-12 重庆新红旗缸盖制造有限公司 A kind of sand core production method
CN111136223A (en) * 2020-01-07 2020-05-12 浙江精恒铜业股份有限公司 Impeller casting process method
CN111511140A (en) * 2020-05-09 2020-08-07 安徽省含山县林头振皖铸造厂 Low-pressure explosion-proof integrated end cover and manufacturing process thereof

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