Baiyun culture square to Sports Center
Publish: 2021-03-26 13:31:52
1.
bus line: Metro Line 2 → Metro Line 1, the whole journey is about 15.2km
1. Take Metro Line 2 from Baiyun culture square, pass 7 stops, and reach gongyuanqian station
2. Take Metro line 1, pass 6 stops, and reach Sports Center Station
3. Walk about 200m to Zijia bakery (Metro sports...
5 yuan)
2. Usually, when the factory purchases the injection molding machine, it selects the appropriate injection molding machine according to the weight of its proct. However, many people do not understand the theoretical injection volume, theoretical injection volume and actual injection volume provided by some injection molding machine manufacturers, Now, the calculation method of these data and the common sense of how to select the injection molding machine according to the plastic parts are introced as follows:
I. The theoretical injection volume and the theoretical injection volume are calculated according to the design value, and the formula is
v= π/ 4 DS2 * s (formula 1)
v-theoretical injection volume cm3
DS screw diameter cm
S-injection stroke cm
the theoretical injection volume is equal to the theoretical injection volume multiplied by the density of plastic at room temperature, i.e.
G = VX ρ Formula 2)
g-theoretical injection volume g
v-theoretical injection volume cm3
ρ- The density of PS at room temperature is 1.05g/cm3. For example, the 160F machine in the company's proct version has a theoretical injection volume of 307cm3 and a theoretical injection volume of 307cm3 × 1.05 = 322.4g
2. Actual injection volume and injection volume
the volume required for each injection is obtained by multiplying the weight of each cavity material by the number of cavities, adding the weight of gate and flow, and then dividing by the density of plastic at the mold temperature:
V = G/ ρ Fusion x η Formula 3)
v-theoretical glue injection volume cm3
g-actual maximum glue injection volume g
ρ- The density of plastics at molding temperature g / cm3
η- The efficiency safety factor of the rubber apron
includes a safety factor considering the backflow of the plastic melt before the closure of the rubber apron and with the gap between the rubber apron and the barrel ring the injection process η For most plastics, η It's 0.97, right η 95
at present, the injection volume and injection volume indicated in the samples of F3, f3j, PVC, pet series procts of the company are obtained according to the above formula and polystyrene density standard. For example: 160f2 machine, injection volume v = 329cm3, PS melting temperature close to ρ Melt = 0.93g/cm3, ξ= 97, calculated by formula (3), the actual maximum injection amount is 296g
for polystyrene (PS), another empirical method to calculate the actual injection volume is to multiply the theoretical injection volume by a coefficient and then multiply by the density of polystyrene at room temperature:
G = v ×ρ×α
G - maximum actual injection volume g
V - Theoretical injection volume cm3
V ρ- PS density 1.05g/cm3 at room temperature
α- Coefficient
according to the national instry standard JB / t7267.94, α The value is 0.85
total weight = the weight of all parts + the weight of the flow channel. The injection quantity is the total weight, and the injection position is the injection quantity of the flow channel; The second injection position is the injection amount of 90% of the proct; The third segment is the injection amount of the last segment< The theoretical injection volume is calculated according to the design value, and the formula is
v= π/ 4 DS2 * s (formula 1)
v-theoretical injection volume cm3
DS screw diameter cm
S-injection stroke cm
the theoretical injection volume is equal to the theoretical injection volume multiplied by the density of plastic at room temperature, i.e.
G = VX ρ Formula 2)
g-theoretical injection volume g
v-theoretical injection volume cm3
ρ- The density of PS at room temperature is 1.05g/cm3< (2) actual injection volume and injection volume
the volume required for each injection is obtained by multiplying the weight of each cavity material by the number of cavities, adding the weight of gate and flow, and then dividing by the density of plastic at the mold temperature:
V = G/ ρ Fusion x η Formula 3)
v-theoretical glue injection volume cm3
g-actual maximum glue injection volume g
ρ- The density of plastics at molding temperature g / cm3
η- The efficiency safety factor of the rubber apron
includes a safety factor considering the backflow of the plastic melt before the closure of the rubber apron and with the gap between the rubber apron and the barrel ring the injection process η For most plastics, η It's 0.97, right η 95
for polystyrene (PS), another empirical method to calculate the actual injection volume is to multiply the theoretical injection volume by a coefficient and then multiply by the density of polystyrene at room temperature:
G = v ×ρ×α
G - maximum actual injection volume g
V - Theoretical injection volume cm3
V ρ- PS density 1.05g/cm3 at room temperature
α- Coefficient
according to the national instry standard JB / t7267.94, α The value is 0.85.
I. The theoretical injection volume and the theoretical injection volume are calculated according to the design value, and the formula is
v= π/ 4 DS2 * s (formula 1)
v-theoretical injection volume cm3
DS screw diameter cm
S-injection stroke cm
the theoretical injection volume is equal to the theoretical injection volume multiplied by the density of plastic at room temperature, i.e.
G = VX ρ Formula 2)
g-theoretical injection volume g
v-theoretical injection volume cm3
ρ- The density of PS at room temperature is 1.05g/cm3. For example, the 160F machine in the company's proct version has a theoretical injection volume of 307cm3 and a theoretical injection volume of 307cm3 × 1.05 = 322.4g
2. Actual injection volume and injection volume
the volume required for each injection is obtained by multiplying the weight of each cavity material by the number of cavities, adding the weight of gate and flow, and then dividing by the density of plastic at the mold temperature:
V = G/ ρ Fusion x η Formula 3)
v-theoretical glue injection volume cm3
g-actual maximum glue injection volume g
ρ- The density of plastics at molding temperature g / cm3
η- The efficiency safety factor of the rubber apron
includes a safety factor considering the backflow of the plastic melt before the closure of the rubber apron and with the gap between the rubber apron and the barrel ring the injection process η For most plastics, η It's 0.97, right η 95
at present, the injection volume and injection volume indicated in the samples of F3, f3j, PVC, pet series procts of the company are obtained according to the above formula and polystyrene density standard. For example: 160f2 machine, injection volume v = 329cm3, PS melting temperature close to ρ Melt = 0.93g/cm3, ξ= 97, calculated by formula (3), the actual maximum injection amount is 296g
for polystyrene (PS), another empirical method to calculate the actual injection volume is to multiply the theoretical injection volume by a coefficient and then multiply by the density of polystyrene at room temperature:
G = v ×ρ×α
G - maximum actual injection volume g
V - Theoretical injection volume cm3
V ρ- PS density 1.05g/cm3 at room temperature
α- Coefficient
according to the national instry standard JB / t7267.94, α The value is 0.85
total weight = the weight of all parts + the weight of the flow channel. The injection quantity is the total weight, and the injection position is the injection quantity of the flow channel; The second injection position is the injection amount of 90% of the proct; The third segment is the injection amount of the last segment< The theoretical injection volume is calculated according to the design value, and the formula is
v= π/ 4 DS2 * s (formula 1)
v-theoretical injection volume cm3
DS screw diameter cm
S-injection stroke cm
the theoretical injection volume is equal to the theoretical injection volume multiplied by the density of plastic at room temperature, i.e.
G = VX ρ Formula 2)
g-theoretical injection volume g
v-theoretical injection volume cm3
ρ- The density of PS at room temperature is 1.05g/cm3< (2) actual injection volume and injection volume
the volume required for each injection is obtained by multiplying the weight of each cavity material by the number of cavities, adding the weight of gate and flow, and then dividing by the density of plastic at the mold temperature:
V = G/ ρ Fusion x η Formula 3)
v-theoretical glue injection volume cm3
g-actual maximum glue injection volume g
ρ- The density of plastics at molding temperature g / cm3
η- The efficiency safety factor of the rubber apron
includes a safety factor considering the backflow of the plastic melt before the closure of the rubber apron and with the gap between the rubber apron and the barrel ring the injection process η For most plastics, η It's 0.97, right η 95
for polystyrene (PS), another empirical method to calculate the actual injection volume is to multiply the theoretical injection volume by a coefficient and then multiply by the density of polystyrene at room temperature:
G = v ×ρ×α
G - maximum actual injection volume g
V - Theoretical injection volume cm3
V ρ- PS density 1.05g/cm3 at room temperature
α- Coefficient
according to the national instry standard JB / t7267.94, α The value is 0.85.
3.
Hello, the ticket price from Baiyun culture square to TIYU West Road is 5 yuan. Please accept it
4.
bus line: Metro Line 1 → Metro Line 2, the whole journey is about 14.0km
1. Take Metro Line 1 from TIYU West Road, after 5 stops, to gongyuanqian station
2. Take Metro Line 2, after 7 stops, to Baiyun culture square station
5. There are Oriental theme post bars such as Oriental bar and Oriental project bar (basically every cm game, and there are many Chinese games, and there are concentrated posts)
thbwiki, which can be used to find information
there are Oriental thematic forums such as Miaoyu hall, fishing ground, Oriental Town and Oriental Fantasy Town, and new games or Chinese characters are generally released in these forums
the original Oriental game is also a peer game, which can be downloaded from the above recommended places.
thbwiki, which can be used to find information
there are Oriental thematic forums such as Miaoyu hall, fishing ground, Oriental Town and Oriental Fantasy Town, and new games or Chinese characters are generally released in these forums
the original Oriental game is also a peer game, which can be downloaded from the above recommended places.
6. 地狱无门_1.mp4
7. Macku 3 alluvium
8. 倒霉熊I
fs2you://MTk2NDI3OTc4
倒霉熊II
fs2you://fDE4NTQ2MDQwOA==
倒霉熊III
fs2you://aXwxODg4NTQ2NzA=
fs2you://MTk2NDI3OTc4
倒霉熊II
fs2you://fDE4NTQ2MDQwOA==
倒霉熊III
fs2you://aXwxODg4NTQ2NzA=
9. The whole journey is about 50 minutes, 21 kilometers: take Metro Line 2 (Guangzhou south station direction) in Baiyun culture square, get off at Changgang station, transfer to Metro Line 8 (Wanshengwei direction), and get off at Pazhou station.
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