CN107961488A - A kind of high security dumbbell and its preparation process - Google Patents
A kind of high security dumbbell and its preparation process Download PDFInfo
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- CN107961488A CN107961488A CN201711357424.3A CN201711357424A CN107961488A CN 107961488 A CN107961488 A CN 107961488A CN 201711357424 A CN201711357424 A CN 201711357424A CN 107961488 A CN107961488 A CN 107961488A
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
- A63B21/06—User-manipulated weights
- A63B21/072—Dumb-bells, bar-bells or the like, e.g. weight discs having an integral peripheral handle
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
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- Engineering & Computer Science (AREA)
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- Orthopedic Medicine & Surgery (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a kind of high security dumbbell, including dumbbell body and the enamelled coating that is arranged on dumbbell body, dumbbell body include following components by mass percentage：Cr：0.01 0.02%, Al：0.7 0.9%, C：0.02 0.03%, Si：1 3%, Co：0.2 0.4%, P：0.0025 0.0030%, S：0.001 0.003%, Ti：0.7 0.9%, V：0.02 0.04%, Cu：0.1 0.3%, Nb：0.001 0.003%, B：0.004 0.006%, compound rare-earth：0.01 0.03%, remaining is Fe and the sum of inevitable impurity, the above components is 100%；Preparation is simple for this, and the dumbbell prepared is safe.
Description
Technical field
The invention belongs to field of exercise equipment, is related to a kind of dumbbell, and in particular to a kind of high security dumbbell and its preparation
Technique.
Background technology
The health-care articles such as dumbbell currently on the market, kettle-bell, gravitation ball, disc, are all that pure iron makes, iron is limited
Resource, and price is every year high, moreover, iron dumbbell gently then damages use site in use once causing the accident,
It is heavy then injure end user.
The content of the invention
The technical problems to be solved by the invention are that shortcoming existing in the prior art, proposes a kind of high safety for more than
Property dumbbell and its preparation process, should preparation is simple, the dumbbell prepared is safe.
The present invention solve above technical problem technical solution be：
A kind of high security dumbbell, including dumbbell body and the enamelled coating that is arranged on dumbbell body, dumbbell body press quality percentage
Include following components than meter：
Cr：0.01-0.02%, Al：0.7-0.9%, C：0.02-0.03%, Si：1-3%, Co：0.2-0.4%, P：0.0025-
0.0030%, S：0.001-0.003%, Ti：0.7-0.9%, V：0.02-0.04%, Cu：0.1-0.3%, Nb：0.001-0.003%,
B：0.004-0.006%, compound rare-earth：0.01-0.03%, remaining is Fe and the sum of inevitable impurity, the above components is
100%；
Compound rare-earth includes following components by mass percentage：Cerium：1-3%, dysprosium：10-12%, bait：5-7%, terbium：3-5%, lutetium：
10-15%, praseodymium：11-12%, surplus are that the sum of lanthanide series, the above components is 100%；
Enamelled coating includes following components according to the mass fraction：5-8 parts of epoxy resin, poly (propylene carbonate) dihydric alcohol：7-9 parts, polyethers
3050：20-30 parts, fire retardant：1-3 parts, foaming agent：2-4 parts, toluene di-isocyanate(TDI)：7-9 parts, two isocyanide of diphenyl methane
Acid esters：10-12 parts, curing agent：10-12 parts, coupling agent：11-12 parts, acetone：10-15 parts, altax：1-3 parts, hard charcoal
It is black：20-30 parts；
Fire retardant is triphenyl phosphate or phosphate toluene diphenyl ester；Foaming agent is melamine or chlorinated paraffin；Curing agent is to change
The polyamide-based curing agent of property；Coupling agent is modified silane coupler.
The technical solution that further limits of the present invention as：
Foregoing high security dumbbell, dumbbell body include following components by mass percentage：
Cr：0.01%, Al：0.7%, C：0.02%, Si：1%, Co：0.2%, P：0.0025%, S：0.001%, Ti：0.7%, V：
0.02%, Cu：0.1%, Nb：0.001%, B：0.004%, compound rare-earth：0.01%, remaining is Fe and inevitable impurity, the above
The sum of each component is 100%；
Compound rare-earth includes following components by mass percentage：Cerium：1%, dysprosium：10%, bait：5%, terbium：3%, lutetium：10%, praseodymium：
11%, surplus is that the sum of lanthanide series, the above components is 100%；
Enamelled coating includes following components according to the mass fraction：5 parts of epoxy resin, poly (propylene carbonate) dihydric alcohol：7 parts, polyethers 3050：
20 parts, fire retardant：1 part, foaming agent：2 parts, toluene di-isocyanate(TDI)：7 parts, methyl diphenylene diisocyanate：10 parts, cure
Agent：10 parts, coupling agent：11 parts, acetone：10 parts, altax：1 part, white carbon：20 parts；
Fire retardant is triphenyl phosphate or phosphate toluene diphenyl ester；Foaming agent is melamine or chlorinated paraffin；Curing agent is to change
The polyamide-based curing agent of property；Coupling agent is modified silane coupler.
Foregoing high security dumbbell, dumbbell body include following components by mass percentage：
Cr：0.015%, Al：0.7-0.9%, C：0.025%, Si：2%, Co：0.3%, P：0.0028%, S：0.002%, Ti：0.8%,
V：0.03%, Cu：0.2%, Nb：0.002%, B：0.005%, compound rare-earth：0.01-0.03%, remaining for Fe and inevitably it is miscellaneous
The sum of matter, the above components is 100%；
Compound rare-earth includes following components by mass percentage：Cerium：2%, dysprosium：11%, bait：6%, terbium：4%, lutetium：12%, praseodymium：
11%, surplus is that the sum of lanthanide series, the above components is 100%；
Enamelled coating includes following components according to the mass fraction：7 parts of epoxy resin, poly (propylene carbonate) dihydric alcohol：8 parts, polyethers 3050：
25 parts, fire retardant：2 parts, foaming agent：3 parts, toluene di-isocyanate(TDI)：8 parts, methyl diphenylene diisocyanate：11 parts, cure
Agent：11 parts, coupling agent：11 parts, acetone：13 parts, altax：2 parts, white carbon：25 parts；
Fire retardant is triphenyl phosphate or phosphate toluene diphenyl ester；Foaming agent is melamine or chlorinated paraffin；Curing agent is to change
The polyamide-based curing agent of property；Coupling agent is modified silane coupler.
The present invention also designs a kind of preparation process of high security dumbbell, specifically includes following steps：
（2）Casting mold is made according to the shape of dumbbell body, and cast gate is provided with casting mold, then casting mold is placed in baker
Dried at 120-150 DEG C；
（3）By the melting sources of dumbbell body, then poured into a mould, when the molten metal of cast from bottom to top reaches the top of riser
When be poured, exothermic mixture, poring rate 67-70kg/s, duration of pouring 15-20s, in casting process are added into riser
A small amount of alterant is added in the middle solution to cast raw material；
The chemical analysis mass percent of alterant is：Rare earth silicon 95%, bismuth ingot 1%, magnesium ingot 2%, aluminium ingot 2%；
（5）Whole dumbbell strand is kept the temperature into 7-10h together with casting mold after cast, to eliminate residual stress, opens cope, lower sand
Case, takes out dumbbell strand and sand removal, is air-cooled to room temperature, is then specially successively through normalizing, tempering to the progress of dumbbell strand：
Normalizing：Dumbbell strand is sent into stove and is heated to 850-900 DEG C, and stove is cooled to 420-450 DEG C, then turn on fire door after
Continuous slow cooling is come out of the stove to 250-300 DEG C is air-cooled to room temperature；
Tempering：By the dumbbell strand stove heat after normalizing to 680-700 DEG C, then keep the temperature 20-25min after come out of the stove carry out water cooling or
Oil cooling is to room temperature；
（6）To step（5）Dumbbell strand after middle processing is polished and is machined, then in the surface spraying of dumbbell body
Coast of paint layer, dumbbell is obtained after dry.
The preparation process of foregoing high security dumbbell, enamelled coating are prepared by specific steps：
Step（1）Poly (propylene carbonate) dihydric alcohol after purification is added to three mouthfuls of burnings of the drying equipped with agitating device, thermometer
Bottle in, be heated up to 80-90 DEG C, vacuum be 0.01-0.02atm under the conditions of filter 20-30min；
Step（2）70-80 DEG C is cooled to, is then slowly added into toluene di-isocyanate(TDI) and methylenebis phenyl isocyanate, acetone
Be stirred, adjust mixing speed for 150-180 turn/min, stir 25-30min, insulation reaction 1-2h, add polyethers 3050 and
Epoxy resin the reaction was continued 1-2h, rise temperature adds white carbon, fire retardant, foaming agent to 80-90 DEG C, and is stirred
It is even, mixing speed is adjusted as 200-250 turns/min, and paint vehicle is made in addition altax after stirring 20-30min；
Step（3）Curing agent and coupling agent are sufficiently mixed, it is stand-by after filtering；
Step（4）By step（2）Obtained mixture and step（3）Obtained mixture is uniformly mixed curing and is sprayed on dumbbell sheet
Enamelled coating is can obtain on body.
The beneficial effects of the invention are as follows：
The present invention first dries casting mold in cast, can reduce the polishing workload in later stage, reduces the work of later stage soldering
Amount, reduces the pulling force between cold and hot molten steel in casting process, avoids organization internal loose while reduce the trickle gas of cast(ing) surface
Hole produces.
The present invention carries out blank heat treatment and improves the comprehensive performance of product i.e. with hardness outside also with certain toughness,
Determining for heat treatment temperature should be to obtain uniform and tiny austenite grain as principle, to obtain tiny geneva after quenching
Body tissue, growing up for austenite grain is directly proportional to hardening heat, carries out temper to product in time after quenching, can not only disappear
Except stress caused by quenching, a certain number of tempered martensites can also be obtained, the high rigidity of product is ensure that at the same time and carries
The high toughness of product.
The compound rare-earth of the present invention, since the metallic atomic radius of above rare earth element is big and rare earth has higher work
Property, it is easy to the gap of storeroom is filled up, meanwhile, rare earth element is easily and the element compounds such as oxygen, sulphur generate the high compound of fusing point,
The addition of compound rare-earth improves the dispersiveness and compatibility that prepare coating to a certain extent, product mix is uniformly also improved
The anti-flammability of coating.
Embodiment
Embodiment 1
The present embodiment provides a kind of high security dumbbell, including dumbbell body and the enamelled coating that is arranged on dumbbell body, dumbbell sheet
Body includes following components by mass percentage：
Cr：0.01%, Al：0.7%, C：0.02%, Si：1%, Co：0.2%, P：0.0025%, S：0.001%, Ti：0.7%, V：
0.02%, Cu：0.1%, Nb：0.001%, B：0.004%, compound rare-earth：0.01%, remaining is Fe and inevitable impurity, the above
The sum of each component is 100%；
Compound rare-earth includes following components by mass percentage：Cerium：1%, dysprosium：10%, bait：5%, terbium：3%, lutetium：10%, praseodymium：
11%, surplus is that the sum of lanthanide series, the above components is 100%；
Enamelled coating includes following components according to the mass fraction：5 parts of epoxy resin, poly (propylene carbonate) dihydric alcohol：7 parts, polyethers 3050：
20 parts, fire retardant：1 part, foaming agent：2 parts, toluene di-isocyanate(TDI)：7 parts, methyl diphenylene diisocyanate：10 parts, cure
Agent：10 parts, coupling agent：11 parts, acetone：10 parts, altax：1 part, white carbon：20 parts；
Fire retardant is triphenyl phosphate；Foaming agent is melamine；Curing agent is modified polyamide class curing agent；Coupling agent is to change
Property silane coupling agent.
The preparation process of above-mentioned high security dumbbell, specifically includes following steps：
（2）Casting mold is made according to the shape of dumbbell body, and cast gate is provided with casting mold, then casting mold is placed in baker
Dried at 130 DEG C；
（3）By the melting sources of dumbbell body, then poured into a mould, when the molten metal of cast from bottom to top reaches the top of riser
When be poured, exothermic mixture, poring rate 68kg/s, duration of pouring 18s, to casting in casting process are added into riser
Make and a small amount of alterant is added in material solution；
The chemical analysis mass percent of alterant is：Rare earth silicon 95%, bismuth ingot 1%, magnesium ingot 2%, aluminium ingot 2%；
（5）Whole dumbbell strand is kept the temperature into 8h together with casting mold after cast, to eliminate residual stress, cope, drag box is opened, takes
Go out dumbbell strand and sand removal, be air-cooled to room temperature, be then specially successively through normalizing, tempering to the progress of dumbbell strand：
Normalizing：Dumbbell strand is sent into stove and is heated to 880 DEG C, and stove is cooled to 430 DEG C, then turns on fire door and continues slow cooling extremely
Come out of the stove for 280 DEG C and be air-cooled to room temperature；
Tempering：By the dumbbell strand stove heat after normalizing to 690 DEG C, then come out of the stove after insulation 22min and carry out water cooling or oil cooling extremely
Room temperature；
（6）To step（5）Dumbbell strand after middle processing is polished and is machined, then in the surface spraying of dumbbell body
Coast of paint layer, dumbbell is obtained after dry.
Above-mentioned enamelled coating is prepared by specific steps：
Step（1）Poly (propylene carbonate) dihydric alcohol after purification is added to three mouthfuls of burnings of the drying equipped with agitating device, thermometer
Bottle in, be heated up to 85 DEG C, vacuum be 0.015atm under the conditions of filter 25min；
Step（2）75 DEG C are cooled to, toluene di-isocyanate(TDI) is then slowly added into and methylenebis phenyl isocyanate, acetone carries out
Stirring, adjustings mixing speed be 180 turns/min, stirring 28min, insulation reaction 1.5h, addition polyethers 3050 and epoxy resin after
Continuous reaction 1.5h, rise temperature adds white carbon, fire retardant, foaming agent to 85 DEG C, and is uniformly mixed, and adjusts stirring speed
Spend for 240 turns/min, stir and paint vehicle is made adding altax after 25min；
Step（3）Curing agent and coupling agent are sufficiently mixed, it is stand-by after filtering；
Step（4）By step（2）Obtained mixture and step（3）Obtained mixture is uniformly mixed curing and is sprayed on dumbbell sheet
Enamelled coating is can obtain on body.
Embodiment 2
The present embodiment provides a kind of high security dumbbell, including dumbbell body and the enamelled coating that is arranged on dumbbell body, dumbbell sheet
Body includes following components by mass percentage：
Cr：0.015%, Al：0.7-0.9%, C：0.025%, Si：2%, Co：0.3%, P：0.0028%, S：0.002%, Ti：0.8%,
V：0.03%, Cu：0.2%, Nb：0.002%, B：0.005%, compound rare-earth：0.01-0.03%, remaining for Fe and inevitably it is miscellaneous
The sum of matter, the above components is 100%；
Compound rare-earth includes following components by mass percentage：Cerium：2%, dysprosium：11%, bait：6%, terbium：4%, lutetium：12%, praseodymium：
11%, surplus is that the sum of lanthanide series, the above components is 100%；
Enamelled coating includes following components according to the mass fraction：7 parts of epoxy resin, poly (propylene carbonate) dihydric alcohol：8 parts, polyethers 3050：
25 parts, fire retardant：2 parts, foaming agent：3 parts, toluene di-isocyanate(TDI)：8 parts, methyl diphenylene diisocyanate：11 parts, cure
Agent：11 parts, coupling agent：11 parts, acetone：13 parts, altax：2 parts, white carbon：25 parts；
Fire retardant is phosphate toluene diphenyl ester；Foaming agent is chlorinated paraffin；Curing agent is modified polyamide class curing agent；Coupling agent
For modified silane coupler.
The preparation process of above-mentioned high security dumbbell, specifically includes following steps：
（2）Casting mold is made according to the shape of dumbbell body, and cast gate is provided with casting mold, then casting mold is placed in baker
Dried at 120-150 DEG C；
（3）By the melting sources of dumbbell body, then poured into a mould, when the molten metal of cast from bottom to top reaches the top of riser
When be poured, exothermic mixture, poring rate 67kg/s, duration of pouring 15s, to casting in casting process are added into riser
Make and a small amount of alterant is added in material solution；
The chemical analysis mass percent of alterant is：Rare earth silicon 95%, bismuth ingot 1%, magnesium ingot 2%, aluminium ingot 2%；
（5）Whole dumbbell strand is kept the temperature into 7-10h together with casting mold after cast, to eliminate residual stress, opens cope, lower sand
Case, takes out dumbbell strand and sand removal, is air-cooled to room temperature, is then specially successively through normalizing, tempering to the progress of dumbbell strand：
Normalizing：Dumbbell strand is sent into stove and is heated to 850 DEG C, and stove is cooled to 420 DEG C, then turns on fire door and continues slow cooling extremely
Come out of the stove for 250-300 DEG C and be air-cooled to room temperature；
Tempering：By the dumbbell strand stove heat after normalizing to 680 DEG C, then come out of the stove after insulation 20min and carry out water cooling or oil cooling extremely
Room temperature；
（6）To step（5）Dumbbell strand after middle processing is polished and is machined, then in the surface spraying of dumbbell body
Coast of paint layer, dumbbell is obtained after dry.
Above-mentioned enamelled coating is prepared by specific steps：
Step（1）Poly (propylene carbonate) dihydric alcohol after purification is added to three mouthfuls of burnings of the drying equipped with agitating device, thermometer
Bottle in, be heated up to 80 DEG C, vacuum be 0.01atm under the conditions of filter 20min；
Step（2）70 DEG C are cooled to, toluene di-isocyanate(TDI) is then slowly added into and methylenebis phenyl isocyanate, acetone carries out
Stirring, adjusting mixing speed is 150 turns/min, stirs 25min, insulation reaction 1h, adds polyethers 3050 and epoxy resin continues
1h is reacted, rise temperature adds white carbon, fire retardant, foaming agent to 80 DEG C, and is uniformly mixed, and adjusts mixing speed and is
200 turns/min, stir 20min after add altax paint vehicle is made；
Step（3）Curing agent and coupling agent are sufficiently mixed, it is stand-by after filtering；
Step（4）By step（2）Obtained mixture and step（3）Obtained mixture is uniformly mixed curing and is sprayed on dumbbell sheet
Enamelled coating is can obtain on body.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical solution, all fall within the protection domains of application claims.
Claims (5)
1. a kind of high security dumbbell, it is characterised in that described mute including dumbbell body and the enamelled coating being arranged on dumbbell body
Bell body includes following components by mass percentage：
Cr：0.01-0.02%, Al：0.7-0.9%, C：0.02-0.03%, Si：1-3%, Co：0.2-0.4%, P：0.0025-
0.0030%, S：0.001-0.003%, Ti：0.7-0.9%, V：0.02-0.04%, Cu：0.1-0.3%, Nb：0.001-0.003%,
B：0.004-0.006%, compound rare-earth：0.01-0.03%, remaining is Fe and the sum of inevitable impurity, the above components is
100%；
The compound rare-earth includes following components by mass percentage：Cerium：1-3%, dysprosium：10-12%, bait：5-7%, terbium：3-
5%, lutetium：10-15%, praseodymium：11-12%, surplus are that the sum of lanthanide series, the above components is 100%；
The enamelled coating includes following components according to the mass fraction：5-8 parts of epoxy resin, poly (propylene carbonate) dihydric alcohol：7-9
Part, polyethers 3050：20-30 parts, fire retardant：1-3 parts, foaming agent：2-4 parts, toluene di-isocyanate(TDI)：7-9 parts, diphenyl methane
Diisocyanate：10-12 parts, curing agent：10-12 parts, coupling agent：11-12 parts, acetone：10-15 parts, altax：1-3 parts,
White carbon：20-30 parts；
The fire retardant is triphenyl phosphate or phosphate toluene diphenyl ester；The foaming agent is melamine or chlorination stone
Wax；The curing agent is modified polyamide class curing agent；The coupling agent is modified silane coupler.
2. high security dumbbell according to claim 1, it is characterised in that：The dumbbell body wraps by mass percentage
Include following components：
Cr：0.01%, Al：0.7%, C：0.02%, Si：1%, Co：0.2%, P：0.0025%, S：0.001%, Ti：0.7%, V：
0.02%, Cu：0.1%, Nb：0.001%, B：0.004%, compound rare-earth：0.01%, remaining is Fe and inevitable impurity, the above
The sum of each component is 100%；
The compound rare-earth includes following components by mass percentage：Cerium：1%, dysprosium：10%, bait：5%, terbium：3%, lutetium：10%,
Praseodymium：11%, surplus is that the sum of lanthanide series, the above components is 100%；
The enamelled coating includes following components according to the mass fraction：5 parts of epoxy resin, poly (propylene carbonate) dihydric alcohol：7 parts, gather
Ether 3050：20 parts, fire retardant：1 part, foaming agent：2 parts, toluene di-isocyanate(TDI)：7 parts, methyl diphenylene diisocyanate：10
Part, curing agent：10 parts, coupling agent：11 parts, acetone：10 parts, altax：1 part, white carbon：20 parts；
The fire retardant is triphenyl phosphate or phosphate toluene diphenyl ester；The foaming agent is melamine or chlorination stone
Wax；The curing agent is modified polyamide class curing agent；The coupling agent is modified silane coupler.
3. high security dumbbell according to claim 1, it is characterised in that：The dumbbell body wraps by mass percentage
Include following components：
Cr：0.015%, Al：0.7-0.9%, C：0.025%, Si：2%, Co：0.3%, P：0.0028%, S：0.002%, Ti：0.8%,
V：0.03%, Cu：0.2%, Nb：0.002%, B：0.005%, compound rare-earth：0.01-0.03%, remaining for Fe and inevitably it is miscellaneous
The sum of matter, the above components is 100%；
The compound rare-earth includes following components by mass percentage：Cerium：2%, dysprosium：11%, bait：6%, terbium：4%, lutetium：12%,
Praseodymium：11%, surplus is that the sum of lanthanide series, the above components is 100%；
The enamelled coating includes following components according to the mass fraction：7 parts of epoxy resin, poly (propylene carbonate) dihydric alcohol：8 parts, gather
Ether 3050：25 parts, fire retardant：2 parts, foaming agent：3 parts, toluene di-isocyanate(TDI)：8 parts, methyl diphenylene diisocyanate：11
Part, curing agent：11 parts, coupling agent：11 parts, acetone：13 parts, altax：2 parts, white carbon：25 parts；
The fire retardant is triphenyl phosphate or phosphate toluene diphenyl ester；The foaming agent is melamine or chlorination stone
Wax；The curing agent is modified polyamide class curing agent；The coupling agent is modified silane coupler.
4. the preparation process of the high security dumbbell as described in any claim in claim 1-3, it is characterised in that specific
Comprise the following steps：
（2）Casting mold is made according to the shape of dumbbell body, and cast gate is provided with casting mold, then casting mold is placed in baker
Dried at 120-150 DEG C；
（3）By the melting sources of dumbbell body, then poured into a mould, when the molten metal of cast from bottom to top reaches the top of riser
When be poured, exothermic mixture, poring rate 67-70kg/s, duration of pouring 15-20s, in casting process are added into riser
A small amount of alterant is added in the middle solution to cast raw material；
The chemical analysis mass percent of the alterant is：Rare earth silicon 95%, bismuth ingot 1%, magnesium ingot 2%, aluminium ingot 2%；
（5）Whole dumbbell strand is kept the temperature into 7-10h together with casting mold after cast, to eliminate residual stress, opens cope, lower sand
Case, takes out dumbbell strand and sand removal, is air-cooled to room temperature, is then specially successively through normalizing, tempering to the progress of dumbbell strand：
Normalizing：Dumbbell strand is sent into stove and is heated to 850-900 DEG C, and stove is cooled to 420-450 DEG C, then turn on fire door after
Continuous slow cooling is come out of the stove to 250-300 DEG C is air-cooled to room temperature；
Tempering：By the dumbbell strand stove heat after normalizing to 680-700 DEG C, then keep the temperature 20-25min after come out of the stove carry out water cooling or
Oil cooling is to room temperature；
（6）To step（5）Dumbbell strand after middle processing is polished and is machined, then in the surface spraying of dumbbell body
Coast of paint layer, dumbbell is obtained after dry.
5. the preparation process of high security dumbbell as claimed in claim 4, it is characterised in that the enamelled coating presses specific steps
Prepare：
Step（1）Poly (propylene carbonate) dihydric alcohol after purification is added to three mouthfuls of burnings of the drying equipped with agitating device, thermometer
Bottle in, be heated up to 80-90 DEG C, vacuum be 0.01-0.02atm under the conditions of filter 20-30min；
Step（2）70-80 DEG C is cooled to, is then slowly added into toluene di-isocyanate(TDI) and methylenebis phenyl isocyanate, acetone
Be stirred, adjust mixing speed for 150-180 turn/min, stir 25-30min, insulation reaction 1-2h, add polyethers 3050 and
Epoxy resin the reaction was continued 1-2h, rise temperature adds white carbon, fire retardant, foaming agent to 80-90 DEG C, and is stirred
It is even, mixing speed is adjusted as 200-250 turns/min, and paint vehicle is made in addition altax after stirring 20-30min；
Step（3）Curing agent and coupling agent are sufficiently mixed, it is stand-by after filtering；
Step（4）By step（2）Obtained mixture and step（3）Obtained mixture is uniformly mixed curing and is sprayed on dumbbell sheet
Enamelled coating is can obtain on body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711357424.3A CN107961488A (en) | 2017-12-16 | 2017-12-16 | A kind of high security dumbbell and its preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711357424.3A CN107961488A (en) | 2017-12-16 | 2017-12-16 | A kind of high security dumbbell and its preparation process |
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| Publication Number | Publication Date |
|---|---|
| CN107961488A true CN107961488A (en) | 2018-04-27 |
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| CN106634436A (en) * | 2016-12-21 | 2017-05-10 | 苏州劲元油压机械有限公司 | Production process of impact-resistant corrosion-resistant check valve |
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| US20110129889A1 (en) * | 2008-07-21 | 2011-06-02 | Praj Industries Limited | Process for Production of Ethanol from Lignocellulosic Material |
| CN103103387A (en) * | 2012-11-09 | 2013-05-15 | 安徽欣意电缆有限公司 | Al-Fe-C-RE aluminium alloy, preparation method thereof and power cable |
| CN104673079A (en) * | 2015-03-11 | 2015-06-03 | 江苏欣安新材料技术有限公司 | Waterproof, corrosion-resistant and fire-retardant PU (polyurethane) coating and preparation method thereof |
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Application publication date: 20180427 |