Aluminum gravity casting Introduction:
The gravity casting means the part is injected
by the earth's gravity. The generalized gravity casting includes sand casting,
Metal mold casting (permanent mould casting), investment casting, Lost Foam
Casting, Mud casting etc. The narrow meaning of gravity casting is metal mold
casting (permanent mould casting).
The permanent mold casting is modern
technology that the mould made by heat resistant alloy steel.
The metal liquid generally injected into the
gate by manual. Full of cavity depend on weight of liquid metal, exhaust, cool,
open mould and get products.
Process flow: smelting, filling cavity,
exhaust, cool, open mould, heat treatment, downstream processing.
The characteristics of the aluminum gravity
casting:
1. Less casting porosity, heat treatment can
be performed. The strength of the product can be improved greatly after heat
treatment, better than Die Casting Parts.
2. Product density is low, molding depend on
the liquid weight, the density of the product is lower than die casting parts,
its strength is slightly worse, but the elongation is higher.
3. The product surface finish is not high. Easy
form similar blasting pit on the surface of casting products after cooling
contraction.
4. Slow filling and low production efficiency,
the production efficiency is only about a quarter compare the high pressure
casting, caused the product cost is high.
5. Mould life is longer than die casting
mould, and mould cost is low also.
6. Process is relatively simple.
7. Not suitable for production of thin wall
parts.
The aluminum gravity casting conventional materials
Production and QC control of aluminum gravity casting
Aluminium Gravity Casting, Aluminum Gravity Casting Part, Aluminum Permanent Mould Casting, A356 Gravity Casting Part, Aluminum Low Pressure Casting Part, Aluminum Permanent Mold casting Part NINGBO BEILUN LEMA MACHINERY TECHNOLOGY CO.,LTD , http://www.china-lema.com
Specifications
Injection molding machineÂ
1.Big tie bar space and shot weight capacityÂ
2.Most famous component partsÂ
3.Perfect after-service
FEATURES
- A variety of text can be switched.
- Manual, semi-automatic and fully automatic mode.
- Automatic movement monitoring with alarm and fault diagnosis.
- Function of slope setting can set the start and stop of movements, so as ensure the smooth movement
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CONTROL SYSTEM
All-digital control system uses dedicated controller, multiple CPU processing division,
a multi-functional automatic fault detection, alarm system, certificates 99 mold of
processing procedures, with remote control interface. System is of high stability and
responsiveness. System uses color LCD, man made interface for easy operation and
with a number of peripheral interfaces.
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HYDRAULIC SYSTEM
Advanced hydraulic system design, through proportional control of pressure, flow achieves rapid multi-level pressure, speed switching, the system configuration is reasonable, stable and reliable. The noise is less than 75 dB. The medium and large machine adopts a two-way cartridge inserted valve system to improve the system of flow and speed of response, and makes the whole machine reach the best performance.
SERVO SYSTEM
After receiving the pressure and flow instruction from computer controller, the servo driver will compare it with the actual pressure and flow feedback, and rectify the difference by controlling the rotating speed of the servo motor. In this way, the control of injection molding is not only acurate but also fast, and the repeatabillity of the products high as well.
 
Technical parameters
MODELÂ
BST-1800A
INJECTIONÂ UNITÂ
Â
A
B
Screw diameterÂ
mm
45
48
Shot size(theoretical)Â
Cm³
372
420
Shot weightÂ
g
335
378
Injection pressureÂ
Mpa
168
148
Injection rateÂ
g/s
142
160
Screw L/D ratioÂ
L/D
23.1
21.7
Screw speedÂ
r.p.m
0-180
Nozzle DiameterÂ
Srmm
20
CLAMPINGÂ
Â
Â
Clamp tonnageÂ
KN
1800
Toggle strokeÂ
mm
440
Mould ThicknessÂ
mm
180-470
Space between tie-barsÂ
mm
480X460
Ejector strokeÂ
mm
155
Ejector tonnageÂ
KN
70
Ejector numberÂ
Piece
5
Hole DiameterÂ
mm
125
OTHERSÂ
Â
Â
Heat powerÂ
KW
11
Max. pump pressureÂ
MPa
16
Pump motor powerÂ
KW
15
Valve SizeÂ
mm
16
Machine dimensionÂ
m
5.3X1.6X1.75
Machine weightÂ
t
5.5
Oil tank capacityÂ
L
250
Our Service
Supply mode: the supplier factory delivery, simple packaging, the supplier agent consignments, the expense is payed by the buyer .
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Terms of payment: the buyer pay 30% of the total payment as the signing of the deposit, the contract comes into effect, pay the balance before shipment .
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Quality assurance: the equipment according to the enterprise standard implementation and mechanical guarantee period is one year, the main electrical appliances for half a year .
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Method of acceptance: equipment processing after the completion of delivery, the buyer sent to the factory acceptance, for commissioning, the buyer to provide raw materials for plastic material .
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Technical and after-sales service:
The supplier the following technical and after-sales service commitment
A) provide on-site installation guide;
B) responsible for the commissioning of equipment;
C) responsible for the buyer's personnel mount guard before the operation and maintenance training;
D) one year free warranty (due to the buyer's improper operation caused by damage charge costs), and ensure the supply of spare parts for a long time, only receive the cost.
E) provide technical advisory services for a long time
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Delivery date: the contract is signed and completed within 45 working days after receiving the deposit unit processing and manufacturing, with the conditions of the factory acceptance
PVC PPR Pipe Fittings Injection Molding Making Machine
Model NO.: BST-1800A
Screw Diameter: 45-48mm
Shot Size: 372-420cm³
Shot Weight: 335-378g
Injection Pressure: 168-148MPa
Injection Rate: 142-160g/S
Screw L/D Ratio: 23.1-21.7L/D
Screw Speed: 0-180r.p.m
Nozzle Diameter: 20
Clamp Tonnage: 1800kn
Trademark: BEST MACHINE
Transport Package: Wooden Package or by Order
Specification: CE
Origin: China
HS Code: 8477101010