CN101973098A - Casting method for polyurethane product - Google Patents
Casting method for polyurethane product Download PDFInfo
- Publication number
- CN101973098A CN101973098A CN 201010283816 CN201010283816A CN101973098A CN 101973098 A CN101973098 A CN 101973098A CN 201010283816 CN201010283816 CN 201010283816 CN 201010283816 A CN201010283816 A CN 201010283816A CN 101973098 A CN101973098 A CN 101973098A
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- product
- casting
- cast gate
- mould
- sprues
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- 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.)
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- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a casting method for a polyurethane product. The method is characterized by comprising the following steps of: 1, controlling the inside diameter of sprues at 40 to 120 millimeters, wherein the sprues are trapezoidal; 2, forming a plurality of sprues on a die according to the size dimension of the product; 3, forming the sprues at the bottom of the die, and performing foaming upwards from the bottom; 4, casting the product for many times; and 5, during repeated casting, casting the material and discharging the air at intervals. The casting method for the polyurethane product has strong practicability and good PU foaming quality, and fully eliminates the defects of slurry, agglomeration and the like; and the product has exquisite and uniform outer surface and good consistency.
Description
Technical field
The present invention relates to a kind of associated methods of organic material, relate in particular to a kind of casting forming method of polyurethane products.
Background technology
The polyurethanes product, big (size 〉=500*500), even, the complex-shaped product of became uneven of size particularly, for example, the vibration isolator series of products that on automobile, generally adopt, the gauge that has reaches 150mm, the some places gauge but has only 5mm, and overall dimensions is 1400mm*900mm*550mm.The casting forming method of this series products of prior art is to take single gate diameter, and gate diameter is about φ 35mm; And the use disposal pouring behind the casting complete, is closed cast gate at once.This causes the of poor quality of product, on product external surfaces, there are defectives such as a large amount of slurries, pore, cracking, have a strong impact on NVH (english abbreviation of noise, vibration and comfortableness) (Noise, Vibration, the Harshness) performance of product, make the sound-insulation capability of product reduce appearance poor.
Summary of the invention
Purpose of the present invention is exactly in order to provide a kind of casting forming method of the polyurethane products that can effectively improve the quality of products.
In order to achieve the above object, the present invention has adopted following technical scheme: a kind of casting forming method of polyurethane products, to implement by a sleeve forming mould, and mould is provided with cast gate and gas outlet, is characterized in:
One, the internal diameter of cast gate is controlled at 40mm-120mm, and being shaped as of cast gate is trapezoidal;
Two, according to the size of product size, on a mould, a plurality of cast gates are set;
Three, cast gate is arranged on mold bottom, the upwards foaming from the bottom;
Four, product is by casting complete repeatedly;
When five, repeatedly pouring into a mould, water material and carry out at interval with venting.
The internal diameter of described cast gate is 80mm*120mm.
Described cast gate is five, and the gas outlet is two.
The casting forming method of polyurethane products of the present invention compared with prior art has the following advantages:
One, practical, the PU foaming quality is good, has eliminated defectives such as slurry, caking fully, and the outer surface of product is fine and smooth, even;
Two, of many uses, consistent, effective.
Three, consistency of product is good.
The specific embodiment
The casting forming method of polyurethane products of the present invention is implemented by a sleeve forming mould, and mould is provided with cast gate and gas outlet, except the moulding by casting step of routine, has also taked following measure:
One, adopt big cast gate: the internal diameter of cast gate is controlled at more than the 40mm, and stock size is 80mm*120mm, and cast gate adopts compactor to fix, and is shaped as trapezoidal;
Two, cast gate quantity:, take many pouring gate structures according to the size of product size.For example, be the product of 1400mm*900mm*550mm to overall dimensions, adopt the mould of five cast gate+two gas outlets;
Three, pouring type: cast gate is located at mold bottom, upwards foaming from the bottom;
Four, the prescription adjustment of product: stabilizing agent (for example 10366) is increased to 0.5%-1.0%; The amount of blowing agent (for example water) is reduced to 2.8%.
Five, adopt the repeatedly technology of cast:
When six, repeatedly pouring into a mould, water material and carry out at interval with venting.
The casting forming method of polyurethane products of the present invention is used to make the vibration isolator series of products that generally adopt on the automobile.
Claims (3)
1. the casting forming method of polyurethane products is implemented by a sleeve forming mould, and mould is provided with cast gate and gas outlet, it is characterized in that:
One, the internal diameter of cast gate is controlled at 40mm-120mm, and being shaped as of cast gate is trapezoidal;
Two, according to the size of product size, on a mould, a plurality of cast gates are set;
Three, cast gate is arranged on mold bottom, the upwards foaming from the bottom;
Four, product is by casting complete repeatedly;
When five, repeatedly pouring into a mould, water material and carry out at interval with venting.
2. the casting forming method of polyurethane products as claimed in claim 1, it is characterized in that: the internal diameter of described cast gate is 80mm*120mm.
3. the casting forming method of polyurethane products as claimed in claim 1, it is characterized in that: described cast gate is five, the gas outlet is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010283816 CN101973098A (en) | 2010-09-16 | 2010-09-16 | Casting method for polyurethane product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010283816 CN101973098A (en) | 2010-09-16 | 2010-09-16 | Casting method for polyurethane product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101973098A true CN101973098A (en) | 2011-02-16 |
Family
ID=43573020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010283816 Pending CN101973098A (en) | 2010-09-16 | 2010-09-16 | Casting method for polyurethane product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101973098A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61230914A (en) * | 1985-04-05 | 1986-10-15 | Polyurethan Kasei Kk | Forming of urethane foam panel |
| JPH07205166A (en) * | 1994-01-13 | 1995-08-08 | Toyo Tire & Rubber Co Ltd | Production of synthetic resin foam heat insulating material |
| CN1318591A (en) * | 2001-04-30 | 2001-10-24 | 张云龙 | Method for making handiwork of yuhua pebbles and polyester resin |
| CN101200150A (en) * | 2006-12-12 | 2008-06-18 | 天津市世纪东方建筑景观雕塑技术开发中心 | Serpentine-jade imitating carving matched with Chinese knot knitting |
| CN101254655A (en) * | 2008-04-08 | 2008-09-03 | 北京航空航天大学 | Fiber reinforcement polyurethane fine screen mesh forming mold |
-
2010
- 2010-09-16 CN CN 201010283816 patent/CN101973098A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61230914A (en) * | 1985-04-05 | 1986-10-15 | Polyurethan Kasei Kk | Forming of urethane foam panel |
| JPH07205166A (en) * | 1994-01-13 | 1995-08-08 | Toyo Tire & Rubber Co Ltd | Production of synthetic resin foam heat insulating material |
| CN1318591A (en) * | 2001-04-30 | 2001-10-24 | 张云龙 | Method for making handiwork of yuhua pebbles and polyester resin |
| CN101200150A (en) * | 2006-12-12 | 2008-06-18 | 天津市世纪东方建筑景观雕塑技术开发中心 | Serpentine-jade imitating carving matched with Chinese knot knitting |
| CN101254655A (en) * | 2008-04-08 | 2008-09-03 | 北京航空航天大学 | Fiber reinforcement polyurethane fine screen mesh forming mold |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110216 |