CN105499501A - Preparation method for expendable mold patterns - Google Patents
Preparation method for expendable mold patterns Download PDFInfo
- Publication number
- CN105499501A CN105499501A CN201510946672.6A CN201510946672A CN105499501A CN 105499501 A CN105499501 A CN 105499501A CN 201510946672 A CN201510946672 A CN 201510946672A CN 105499501 A CN105499501 A CN 105499501A
- Authority
- CN
- China
- Prior art keywords
- preparation
- coating
- degree
- lost foam
- foam pattern
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a preparation method for expendable mold patterns. The preparation method for the expendable mold patterns comprises the steps of pre-expanding, foaming, bonding and glue applying. In the pouring process, bubbles will not be generated easily, expendable molds are repeatedly coated, the product glossiness is good, and sand adhesion is avoided.
Description
Technical field
The present invention relates to a kind of lost foam pattern preparation method.
Background technology
At present, the mould that is applicable to of the founder of traditional evaporative pattern: casting pig--nonferrous alloy--common straightcarbon steel--spheroidal graphite cast-iron--mild steel and steel alloy; Adopt common process: foaming plastic bead, prefoam, pattern molding foams, and apperance combines, brushing paint, moulding, cast, and fall sand; There is many defects due to the reason of mold materials itself and the reason of technique itself in the mould produced like this, is easy to produce bubble when pouring into a mould.The glossiness of product is bad and scab is many.
Summary of the invention
For solving the problem in background technology, the invention provides a kind of lost foam pattern preparation method, thus solve and be easy to produce bubble when pouring into a mould, and the bad and technical problem that scab is many of the glossiness of product.
The present invention realizes in the following manner:
A kind of lost foam pattern preparation method, preparation process is as follows:
Pre-to send out: check EPS raw material whether in the scope of application (5 months winters, summer, autumn 2-3 month), pre-density domination of sending out at 26g, upper lower deviation 0.5, the curing time controls to be finished in 2-96h, removes caking glare bead by screening;
Shaping: to check whether prefoaming beading meets shaping demand, white mould surface perfect (without burning or raw situation) surface smoothness is obtained good by control steaming time, white mould slaking: natural drying, 12 hours time, be placed on flat board and prevent modification, drying room is dried: by drying curve determination drying time, general control is within 48-72 hour;
Bonding: to renew according to drawing, oven dry model is beaten appearance burr protruding, with paper self-adhesive tape, double faced adhesive tape repairs pit, destroys the defects such as damage, even brushing cold glue, the white mould of combination burst, and with paper self-adhesive tape, is obturaged in bonding gap, check inner cavity size, control, at ± 0.5mm, optionally to use batten lacing wire fixed dimension, according to bonding figure or exemplar is bonding waters, rising head, batten, hot melt adhesive temperature consumption is moderate, must not have and leak glue phenomenon;
Coating: in strict accordance with formulation for coating material, controls coating layer thickness at 1.2-1.5mm, builds capping, smallclothes remove the limit, and coating drying time controls more than 8 hours, bake out temperature 45-50 degree, require when doing coating that bubble is as far as possible few, without leaking white phenomenon, can do second time after parching for one time, coating is repaired and is required free from flaw, leaks in vain, coating needs is even, running gate system coating layer thickness 2-3mm, built-up pattern as requested, running gate system;
Black area: bed load requires more than 150mm, lid more than sand 100-200mm, partial plugs sand requires closely, ram-jolt, time of vibration controls at 10-30s, through 3-4 vibration, cup is made to want height to shake out the above 15mm in face, tapping temperature controls more than 1620 degree, and poring rate is followed slowly, fast, steady principle, and deslagging pushing off the slag is wanted carefully, pour into a mould and bag is wanted accurate, avoid filling sand, cast 2 as a child mould turnover cools 2 hours and gets final product ball blast, should knock out the scab on coating top layer before entering shot-blasting machine;
Inspection: outward appearance detects: do not have cold shut, slag input, the defects such as knurl of tapping a blast furnace, dimension control: upper surface inner cavity size controls at ± 1mm, and plane modification controls at 2mm, within, promptly and accurately, requirement of spraying paint is evenly without leaking for mechanical performance testing requirement.
The present invention not easily produces bubble when having cast and hangs through 3 times and is coated with evaporative pattern, makes product glossiness good, without scab.
Detailed description of the invention
Understand below technical scheme of the present invention to make those skilled in the art that the invention will be further described better:
Embodiment one:
A kind of lost foam pattern preparation method, preparation process is as follows:
1) send out in advance: check that whether EPS raw material is qualified, remove caking glare bead by screening;
2) shaping: when prefoaming beading meets shaping demand, use booster jar supercharging, get Bai Mo after supercharging;
3) bonding: according to figure demand, oven dry model is beaten appearance burr protruding, with paper self-adhesive tape, the defects such as gluing repairing pit, destruction damage;
4) coating: in strict accordance with coating formula, coating drying time controls at 9 hours, bake out temperature 45 degree, built-up pattern as requested, running gate system; Whether inspection mould is qualified.
Preferably, pre-described step China and foreign countries cavity temperature is 90 degree, and interior cavity temperature is 85 degree, and a pre-density of every 1000ml lost foam pattern is 24.5g, and wherein slaking bead moisture drier is measured.
Embodiment two:
A kind of lost foam pattern preparation method, preparation process is as follows:
1) send out in advance: check that whether EPS raw material is qualified, remove caking glare bead by screening;
2) shaping: when prefoaming beading meets shaping demand, use booster jar supercharging, get Bai Mo after supercharging;
3) bonding: according to figure demand, oven dry model is beaten appearance burr protruding, with paper self-adhesive tape, the defects such as gluing repairing pit, destruction damage;
4) coating: in strict accordance with coating formula, coating drying time controls at 10 hours, bake out temperature 50 degree, built-up pattern as requested, running gate system; Whether inspection mould is qualified.
Preferably, pre-described step China and foreign countries cavity temperature is 105 degree, and interior cavity temperature is 100 degree, and a pre-density of every 1000ml lost foam pattern is 26g, wherein slaking bead moisture drier is measured.
Embodiment three
A kind of lost foam pattern preparation method, preparation process is as follows:
1) send out in advance: check that whether EPS raw material is qualified, remove caking glare bead by screening;
2) shaping: when prefoaming beading meets shaping demand, use booster jar supercharging, get Bai Mo after supercharging;
3) bonding: according to figure demand, oven dry model is beaten appearance burr protruding, with paper self-adhesive tape, the defects such as gluing repairing pit, destruction damage;
4) coating: in strict accordance with coating formula, coating drying time controls at 10 hours, bake out temperature 48 degree, built-up pattern as requested, running gate system; Whether inspection mould is qualified.
Preferably, pre-described step China and foreign countries cavity temperature is 100 degree, and interior cavity temperature is 90 degree, and a pre-density of every 1000ml lost foam pattern is 25.2g, wherein slaking bead moisture drier is measured.
Mode above only by illustrating describes some one exemplary embodiment of the present invention, undoubtedly, for those of ordinary skill in the art, when without departing from the spirit and scope of the present invention, can revise described embodiment by various different mode.Therefore, being described in is illustrative in essence, should not be construed as the restriction to the claims in the present invention protection domain.
Claims (2)
1. a lost foam pattern preparation method, is characterized in that, preparation process is as follows:
1) send out in advance: check that whether EPS raw material is qualified, remove caking glare bead by screening;
2) shaping: when prefoaming beading meets shaping demand, use booster jar supercharging, get Bai Mo after supercharging;
3) bonding: according to figure demand, oven dry model is beaten appearance burr protruding, with paper self-adhesive tape, the defects such as gluing repairing pit, destruction damage;
4) coating: in strict accordance with coating formula, coating drying time controls more than 8 hours, bake out temperature 45-50 degree, built-up pattern as requested, running gate system; Whether inspection mould is qualified.
2. a kind of lost foam pattern preparation method according to claim 1, it is characterized in that: pre-described step China and foreign countries cavity temperature is 90-105 degree, interior cavity temperature is 85-100 degree, and a pre-density of every 1000ml lost foam pattern is 25 ± 0.5g, and wherein slaking bead moisture drier is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510946672.6A CN105499501A (en) | 2015-12-15 | 2015-12-15 | Preparation method for expendable mold patterns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510946672.6A CN105499501A (en) | 2015-12-15 | 2015-12-15 | Preparation method for expendable mold patterns |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105499501A true CN105499501A (en) | 2016-04-20 |
Family
ID=55708016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510946672.6A Pending CN105499501A (en) | 2015-12-15 | 2015-12-15 | Preparation method for expendable mold patterns |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105499501A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734913A (en) * | 2016-12-28 | 2017-05-31 | 西安西工大超晶科技发展有限责任公司 | A kind of precision-investment casting model method for repairing and mending |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493414A (en) * | 2002-10-28 | 2004-05-05 | 王玉和 | Method of casting loading machine large speed changing box body using vanishing mould |
| CN102363201A (en) * | 2011-09-23 | 2012-02-29 | 无锡市凯杰铸造有限公司 | Lost foam casting method of twist lock shell for containers |
| CN102974762A (en) * | 2012-12-24 | 2013-03-20 | 昌图县吉派机械铸造有限责任公司 | Vacuum evanescent die casting process |
-
2015
- 2015-12-15 CN CN201510946672.6A patent/CN105499501A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493414A (en) * | 2002-10-28 | 2004-05-05 | 王玉和 | Method of casting loading machine large speed changing box body using vanishing mould |
| CN102363201A (en) * | 2011-09-23 | 2012-02-29 | 无锡市凯杰铸造有限公司 | Lost foam casting method of twist lock shell for containers |
| CN102974762A (en) * | 2012-12-24 | 2013-03-20 | 昌图县吉派机械铸造有限责任公司 | Vacuum evanescent die casting process |
Non-Patent Citations (1)
| Title |
|---|
| 李晓霞等: "E37F4-1600401 飞轮壳消失模铸造工艺及防变形措施", 《中国机械工程学会铸造分会第十一届消失模与V法铸造学术年会论文集》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734913A (en) * | 2016-12-28 | 2017-05-31 | 西安西工大超晶科技发展有限责任公司 | A kind of precision-investment casting model method for repairing and mending |
| CN106734913B (en) * | 2016-12-28 | 2018-09-28 | 西安西工大超晶科技发展有限责任公司 | A kind of precision-investment casting model method for repairing and mending |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160420 |