A kind of self-lubricating type tire die cast terra alba and preparation technology thereof
Technical field
The present invention relates to a kind of tire die cast terra alba and preparation technology thereof, especially relate to a kind of self-lubricating type tire die cast terra alba and preparation technology thereof.
Background technology
At present, most of tire casting plaster die production producer all directly uses high strength gypsum (α-gypsum) powder to be starting material when manufacture of tires casting plaster mould; By mass ratio is that 1:0.5~0.55 is mixed with water and carried out Mold Making, because the rare thick degree of gained calcium plaster is higher, its effective churning time has only 3min; Flowing time 3~5min, presetting period 9min, final setting time 30min; Not only caused certain limitation, also be unfavorable for finishing obtained mould to operation.In addition, utilize the wear resisting property of the obtained mould of above-mentioned α-terra alba relatively poor, work-ing life is shorter, and energy consumption is high, shows according to statistics, and the annual loss that causes because of friction accounts for one of percentage of total output value.Therefore, seek a kind of rationally, the tire-mold casting plaster powder prescription of science, alleviate material friction, wearing and tearing and solve the lubrication protection problem, become a kind of expectation of products production producer and mould user.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of existing long effective churning time and flowing time are provided; Suitable presetting period and final setting time are arranged again, and with its mould wear resisting property of processing good self-lubricating type tire die cast terra alba and preparation technology thereof.
The objective of the invention is to realize through following technical scheme:
The present invention's self-lubricating type tire die cast terra alba; Raw material by following parts by weight is processed: 100 parts of α-terra albas, 0.5~1.5 part of sulfonated melamine compound resin, 1~3 part of peach gum; 5~10 parts of white portland cements, 0.5~1.5 part of tetrafluoroethylene.
Further, the preferred version of said self-lubricating type tire die cast terra alba is processed by the raw material of following parts by weight: 100 parts of α-terra albas, 1 part of sulfonated melamine compound resin, 2 parts of peach gums, 8 parts of white portland cements, 1 part of tetrafluoroethylene.
The preparation technology of the present invention's self-lubricating type tire die cast terra alba: at first take by weighing each component raw material, place mixer to mix 10~20min each component raw material then by said parts by weight.
In the said raw material: α-terra alba is a main raw, and tetrafluoroethylene is a lubricant, and sulfonated melamine compound resin is a water reducer, also plays toughener and sizing agent effect, and peach gum is an additive, and existing sizing agent effect has delayed coagulation again.
Said tetrafluoroethylene is good self-lubricating agent, and its compound with regular structure, chemical property are stablized, and has good wearability, and its frictional coefficient is minimum in the known polymer generally 0.04~0.3.Show after deliberation; When tetrafluoroethylene and other material generation friction; Its macromolecule crystal is drawn out crystal region, shifts to even face, is acted on by Coulomb's force and Van der Waals force and forms the thick composite lubricating film of one deck 20~30nm on the dual face; Thereby can reduce the grinding tool wearing and tearing effectively, and prolong its work-ing life.
Compare with existing α-terra alba; The present invention's self-lubricating type tire die cast terra alba existing long effective churning time and flowing time; Suitable presetting period and final setting time are arranged again; And obtained mould has effect preferably aspect material friction, wearing and tearing and the lubrication protection problem alleviating, thereby can prolong the work-ing life of mould, cuts down the consumption of energy greatly and cost; Its preparation technology is simple, and easy handling helps suitability for industrialized production.
Embodiment
Below in conjunction with embodiment the present invention is described further.
Embodiment 1
The self-lubricating type tire die cast terra alba of present embodiment is processed by the raw material of following parts by weight: 100 parts of α-terra albas, 0.5 part of sulfonated melamine compound resin, 1 part of peach gum, 5 parts of white portland cements, 0.5 part of tetrafluoroethylene.
Preparation: at first take by weighing each component raw material, then each component raw material is placed mixer mixing 15min by said parts by weight.
Embodiment 2
The self-lubricating type tire die cast terra alba of present embodiment is processed by the raw material of following parts by weight: 100 parts of α-terra albas, 1 part of sulfonated melamine compound resin, 2 parts of peach gums, 8 parts of white portland cements, 1 part of tetrafluoroethylene.
Its preparation technology is with embodiment 1.
Embodiment 3
The self-lubricating type tire die cast terra alba of present embodiment is processed by the raw material of following parts by weight: 100 parts of α-terra albas, 1.5 parts of sulfonated melamine compound resins, 3 parts of peach gums, 10 parts of white portland cements, 1.5 parts of tetrafluoroethylene.
Its preparation technology is with embodiment 1.
The method of use of said embodiment 1-3 self-lubricating type tire die cast terra alba:
The ratio of said self-lubricating type tire die cast terra alba in mass ratio 1:0.5 dropped in the water, and behind the immersion 5min, vacuum stirring 8min promptly can be used for moulding; Mould is repaired after the initial set, treat the mould complete drying after, just can use.
Embodiment 1-3 gained self-lubricating type tire casting plaster powder and existing α-terra alba are made mould respectively as stated above; Its effective churning time, flowing time, presetting period, final setting time are tested; And its wear-resisting rate of processing product tested, test result is seen table 1.
Table 1
? |
Embodiment 1 |
Embodiment 2 |
Embodiment 3 |
Existing α-terra alba |
Effective churning time (min) |
6.8 |
7.5 |
7.1 |
3.9 |
Flowing time (min) |
8.4 |
9.5 |
8.7 |
4.5 |
Presetting period (min) |
20.5 |
23.4 |
25.3 |
8.9 |
Final setting time (min) |
35.6 |
38.1 |
39.2 |
29.8 |
Wear-resisting rate (g/cm
2)
|
70.30 |
58.10 |
66.20 |
120.20 |
Can be known by last table, compare with existing α-terra alba that self-lubricating type tire casting plaster powder of the present invention is all having clear improvement aspect effective churning time, flowing time, presetting period, the final setting time, particularly the wear resisting property aspect has remarkable advantages.