CN102701692B - High-toughness tire mold casting gypsum powder and preparation process thereof - Google Patents
High-toughness tire mold casting gypsum powder and preparation process thereof Download PDFInfo
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- CN102701692B CN102701692B CN201210001960.0A CN201210001960A CN102701692B CN 102701692 B CN102701692 B CN 102701692B CN 201210001960 A CN201210001960 A CN 201210001960A CN 102701692 B CN102701692 B CN 102701692B
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- gypsum powder
- toughness
- casting gypsum
- tire mold
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- 239000000843 powder Substances 0.000 title claims abstract description 35
- 238000005266 casting Methods 0.000 title claims abstract description 30
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 30
- 239000010440 gypsum Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 15
- 229920006124 polyolefin elastomer Polymers 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 235000006040 Prunus persica var persica Nutrition 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims description 10
- 244000144730 Amygdalus persica Species 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 239000005038 ethylene vinyl acetate Substances 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 abstract description 2
- 240000006413 Prunus persica var. persica Species 0.000 abstract 1
- 238000009776 industrial production Methods 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Landscapes
- Tires In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to high-toughness tire mold casting gypsum powder and a preparation process thereof. The high-toughness tire mold casting gypsum powder is prepared from the following raw materials in parts by weight: 100 parts of alpha-gypsum powder, 15-30 parts of polyolefin elastomer, 10-20 parts of ethylene-vinyl acetate copolymer, 15-30 parts of quartz powder and 0.05-0.1 part of peach gum. The invention further relates to the preparation process of the high-toughness tire mold casting gypsum powder. The high-toughness tire mold casting gypsum powder disclosed by the invention has not only longer effective stirring time and flow time but also appropriate initial setting time and final setting time, and a casting gypsum mold prepared by the high-toughness tire mold casting gypsum powder is greatly improved in the aspects of strength and toughness, can completely meet the current requirements of various technical parameters of tire enterprises in China on tire casting molds and has the advantages of wide range of application and long service life; and the preparation process is simple, easy to operate and beneficial to industrial production.
Description
Technical field
The present invention relates to a kind of tyre mould casting gypsum powder and preparation technology thereof, especially relate to a kind of high tenacity tyre mould casting gypsum powder and preparation technology thereof.
Background technology
At present, most of tyre casting gypsum die production producer is in the time making tyre casting gypsum mould, all directly using high strength gypsum (α-gypsum) powder is starting material, mix with water and carry out Mold Making for 1:0.5～0.55 in mass ratio, because the rare thick degree of gained calcium plaster is higher, its effective churning time only has 3min, flowing time 3～5min, presetting period 9min, final setting time 30min.In addition, utilize the obtained mould of above-mentioned α-terra alba, the coefficient of expansion is large, is about 0.5; Dry folding strength is low, is 7MPa left and right; Dry ultimate compression strength is also lower, 22MPa left and right.Due to too short, effective churning time of starting material presetting period and flowing time also shorter, not only cause certain limitation to operation, nor be beneficial to the finishing to obtained mould, particularly due to intensity and toughness deficiency, to bringing disadvantageous effect the work-ing life of mould.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of existing long effective churning time and flowing time are provided, there are again suitable presetting period and final setting time, and the casting plaster mould made from it the high tenacity tyre mould casting gypsum powder and the preparation technology thereof that aspect intensity and toughness, are being greatly improved.
The object of the invention is to be achieved through the following technical solutions:
The present invention's high tenacity tyre mould casting gypsum powder, raw material by following parts by weight is made: 100 parts of α-terra albas, 15～30 parts of polyolefin elastomers (POE), 10～20 parts of ethylene-vinyl acetate copolymers (EVA), 15～30 parts of silica powders, 0.05～0.1 part of peach gum.
Further, the preferred version of described high tenacity tyre mould casting gypsum powder, is made up of the raw material of following parts by weight: 100 parts of α-terra albas, 25 parts of polyolefin elastomers (POE), 15 parts of ethylene-vinyl acetate copolymers (EVA), 25 parts of silica powders, 0.08 part of peach gum.
The preparation technology of the present invention's high tenacity tyre mould casting gypsum powder: first take each component raw material by described parts by weight, then each component raw material is placed in to mixer and mixes 10～20min.
In described raw material: α-terra alba is main raw, polyolefin elastomer (POE), ethylene-vinyl acetate copolymer (EVA) mainly play toughner effect, and silica powder is additive, and peach gum is additive, not only play sizing agent effect but also play retardant effect.
Compared with existing α-terra alba, the present invention's high tenacity tyre mould casting gypsum powder, not only aspect effective churning time, flowing time, presetting period and final setting time, all improving significantly, and obtained product is significantly improved at aspect of performances such as dry folding strength, dry ultimate compression strength and toughness, can reach the every technical parameter requirement of current domestic tire enterprise to tire casting mould completely, wide accommodation, long service life; Its preparation technology is simple, and easy handling is conducive to suitability for industrialized production.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
The high tenacity tyre mould casting gypsum powder of the present embodiment, is made up of the raw material of following parts by weight: 100 parts of α-terra albas, 15 parts of polyolefin elastomers (POE), 10 parts of ethylene-vinyl acetate copolymers (EVA), 15 parts of silica powders, 0.05 part of peach gum.
Preparation: first take each component raw material by described parts by weight, then each component raw material is placed in to mixer mixing 15min.
Embodiment 2
The high tenacity tyre mould casting gypsum powder of the present embodiment, is made up of the raw material of following parts by weight: 100 parts of α-terra albas, 30 parts of polyolefin elastomers (POE), 20 parts of ethylene-vinyl acetate copolymers (EVA), 30 parts of silica powders, 0.1 part of peach gum.
Its preparation technology is with embodiment 1.
Embodiment 3
The high tenacity tyre mould casting gypsum powder of the present embodiment, is made up of the raw material of following parts by weight: 100 parts of α-terra albas, 25 parts of polyolefin elastomers (POE), 15 parts of ethylene-vinyl acetate copolymers (EVA), 25 parts of silica powders, 0.08 part of peach gum.
Its preparation technology is with embodiment 1.
The using method of the high tenacity tyre mould casting gypsum powder of described embodiment 1～3:
The ratio that is 1:0.5 in mass ratio by gained high tenacity tyre mould casting gypsum powder drops in water, soaks after 2 min, and vacuum stirring 9min, can be used for moulding; Initial set is repaired mould later, after mould complete drying, just can use.
Embodiment 1～3 gained high tenacity tyre mould casting gypsum powder and existing α-terra alba are carried out respectively to Mold Making as stated above, its effective churning time, flowing time, presetting period, final setting time are tested, and to its make the dry folding strength of product, dry intensity test is tested respectively by QB/T 1640-1992, test result is in table 1.
Table 1
| ? | Embodiment 1 | Embodiment 2 | Embodiment 3 | Existing α-terra alba |
| Effectively churning time (min) | 8.2 | 9.1 | 9.5 | 3 |
| Flowing time (min) | 8.8 | 9.2 | 9.2 | 4 |
| Presetting period (min) | 20.8 | 23.7 | 22.5 | 9 |
| Final setting time (min) | 35.8 | 39.6 | 38.3 | 30 |
| Dry folding strength (MPa) | 10 | 12 | 15 | 7 |
| Dry ultimate compression strength (MPa) | 28 | 32 | 35 | 22 |
Can be found out by upper table experimental result, effective churning time of the present invention's high-intensity tire mould casting gypsum powder can be 8～10 min, increases nearly 2 times than effective churning time of existing α-terra alba; Good fluidity, flowing time is 8～10min, increases more than 1 times than the flowing time of existing α-terra alba, is convenient to water molding jig; Presetting period is 20～24min, increases nearly 2 times than the presetting period of existing α-terra alba; Final setting time is 35～40min, also increases to some extent than the final setting time of existing α-terra alba; By dry folding strength and the dry ultimate compression strength of its made tire-mold, with compared with the made tire-mold of existing α-terra alba, also have greatly and improve, thereby can extend its work-ing life.
Claims (3)
1. a high tenacity tyre mould casting gypsum powder, is characterized in that, is made up of the raw material of following parts by weight: 100 parts of α-terra albas, 15～30 parts of polyolefin elastomers, 10～20 parts of ethylene-vinyl acetate copolymers, 15～30 parts of silica powders, 0.05～0.1 part of peach gum.
2. high tenacity tyre mould casting gypsum powder according to claim 1, is characterized in that, is made up of the raw material of following parts by weight: 100 parts of α-terra albas, 25 parts of polyolefin elastomers, 15 parts of ethylene-vinyl acetate copolymers, 25 parts of silica powders, 0.08 part of peach gum.
3. a preparation technology for high tenacity tyre mould casting gypsum powder as claimed in claim 1, is characterized in that: first takes each component raw material by described parts by weight, then each component raw material is placed in to mixer and mixes 10～20min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210001960.0A CN102701692B (en) | 2012-01-06 | 2012-01-06 | High-toughness tire mold casting gypsum powder and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210001960.0A CN102701692B (en) | 2012-01-06 | 2012-01-06 | High-toughness tire mold casting gypsum powder and preparation process thereof |
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| Publication Number | Publication Date |
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| CN102701692A CN102701692A (en) | 2012-10-03 |
| CN102701692B true CN102701692B (en) | 2014-07-30 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891931A (en) * | 2015-05-26 | 2015-09-09 | 柳州市亿廷贸易有限责任公司 | High-strength gypsum |
| CN105110750A (en) * | 2015-08-29 | 2015-12-02 | 湖北凯浩鹿宝石膏科技有限公司 | Gypsum for aviation alloy casting mold and preparation method of gypsum |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594176A (en) * | 2004-07-01 | 2005-03-16 | 易湘如 | Gypsum powder combined material for master mould |
| CN101180246A (en) * | 2005-04-15 | 2008-05-14 | 欧文斯-康宁玻璃纤维技术第二有限公司 | Composition for forming wet fiber based composite materials |
| CN101851081B (en) * | 2009-04-03 | 2013-10-16 | 秦永超 | Glass fiber reinforced gypsum product, and preparation method and equipment thereof |
-
2012
- 2012-01-06 CN CN201210001960.0A patent/CN102701692B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1594176A (en) * | 2004-07-01 | 2005-03-16 | 易湘如 | Gypsum powder combined material for master mould |
| CN101180246A (en) * | 2005-04-15 | 2008-05-14 | 欧文斯-康宁玻璃纤维技术第二有限公司 | Composition for forming wet fiber based composite materials |
| CN101851081B (en) * | 2009-04-03 | 2013-10-16 | 秦永超 | Glass fiber reinforced gypsum product, and preparation method and equipment thereof |
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Effective date of registration: 20160823 Address after: An Industrial Park Economic Development Zone, Changde City, Hunan province Linli County 415200 Patentee after: Hunan Fu Xiang new type building material Co., Ltd. Address before: 410005, 12 floor, Haidong mansion, Furong Road, Changsha, Hunan Patentee before: Liu Liwen |