Sheet Molding Compound for car parts
ZHENGXI is a historical supplier of large hydraulic press systems
for plastic and composite forming applications. One of our core
competencies lie in the production of hydraulic press for SMC (Sheet Molding Compound) - BMC (Bulk
Molding Compound) / GMT (Glass Mat Thermoplastics). These press systems represent the best option when it comes to
high volume production of composite parts with high mechanical
SMC - BMC - GMT COMPRESSION PRESS SYSTEMS
We supply SMC, BMC & GMT compression press systems, with capacity from 5,000 up to 40,000 kN, working at very high
pressure. All the expertise of ZHENGXI relies on the low
consumption / high performance feature, realized through active levelling and PLC control.
Our products allow you to save energy and time, with cycle time
from 45 seconds for structural parts up to 120 seconds for highly
technical parts such as trunk lids or tailgates.
SMC - BMC - GMT FORMING PRESS FEATURES:
Effort from 5,000 up to 40,000 kN
Platen size up to 3,000 X 2,500 mm
Opening 3,000 mm
Stroke 2,000 mm
Fast closing speed 600 mm/s
Working speed 20 mm/s
Fast opening speed 600 mm/s
Integration in automated production lines
Furthermore, you can benefit from the ZHENGXI know-how in complete
automated production lines, all our presses can be implemented with
automatic loading and unloading robots, cutting systems or other add-on equipment such as HP RTM or vacuum systems, GMT oven or thermal regulation
skid. ZHENGXI press systems can run both automatically and
semi-automatically, whatever your needs. More than 100 units are
running worldwide, manufacturing parts for well-known companies of
the auto, aeronautics, aerospace and energy industries. Sheet
Molding Compound for car parts.
Technical specs Yz71-500T SMC/BMC Hydraulic Press machine for
composite frame manhole cover forming
Worktable size F-B
Worktable size L-R
Slider fast descending speed
Slider slow descending speed
Slider preloading speed
Slider pressing speed
Slider slow returning speed
Slider fast returning speed
Physical dimension B ( L-R)
Physical dimension A (F-B)
Physical dimension C (Total height)
Pit size E (F-B)
Pit size D (L-R)
1) emergency stop button: press the "emergency stop" button, the
hydraulic system, including the motor, will stop running. The press
is equipped with two emergency stop buttons, one on the operation
control panel and the other on the mobile operation table. In any
state and situation, press any one of the emergency stop buttons,
and the press stops immediately.
2) Two-handed operation button: Press the synchronization time with
both hands within 0.5S, if it exceeds, it will be invalid.
3) Hydraulic Support Safety Circuit: In order to prevent the slider
from going out of control, a hydraulic double-support safety valve
circuit is installed in the lower chamber of the piston main
cylinder to ensure safety. The hydraulic interlocking circuit is
set to ensure that the upper chamber of the main cylinder can not
be pressurized when the supporting safety valve is not opened.
4) The machine is equipped with power supply, work and other
5) Longitudinal adjustable safety grating protection device is
installed on the front of the press with adjustable position and
600 mm protection height.
6) Overload protection: The hydraulic system is equipped with a
safety valve, which automatically overflows and discharges oil when
the oil pressure exceeds the set value (adjustable), and sends an
alarm signal at the control box.
7) Electrical system protection, motor overload protection and
short-circuit protection, control circuit short-circuit protection
and system alarm function.
8) Touch screen displays all solenoid valves and travel switches
The advantage of ZHENGXI Hydraulic System
1) The hydraulic control system of the equipment is mainly arranged
on the right side of the fuselage with neat appearance and
convenient maintenance. Hydraulic system is composed of oil tank,
hydraulic main control system, pump station, pressure gauge, filter
and other accessories. It is mainly connected to the whole
hydraulic control system through pipeline.
2) The hydraulic system of this machine mainly adopts the
advantages of servo closed-loop control, hydraulic oil temperature
control and double support protection control.
3) The fuel tank is arranged on the right side of the fuselage. It
is mainly used to supply oil and heat dissipation of hydraulic oil
for the driving elements of the whole equipment and to fill the
cylinder quickly when the slider goes down rapidly. The oil tank is
steel plate welded by mixed gas, which reduces welding slag and is
designed as a closed structure. Pickling, passivation and
rust-proof treatment are carried out during tank installation.
Industrial flour dough is used to clean up again before shipment to
ensure that there are no residues and debris on the inner wall. The
fuel tank panel is equipped with a return tank to facilitate the
recovery of waste oil.
4) The side of the tank is provided with a manhole for cleaning the
window cover of the tank to facilitate the cleaning of the tank.
The tank passes through a special oil injection hole, and the
bottom of the tank is also equipped with magnets to absorb
impurities in the oil. The bottom of the tank is slightly inclined
and equipped with an oil drain valve. The tank is welded with steel
plate. Before assembly, pickling, passivation, rust-proof treatment
and leak-proof test should be carried out.
5) The tank is equipped with a level gauge (with temperature
display) on the side, which is convenient for observation when
6) The tank is equipped with an independent oil filter with a
filtering accuracy of 10 microns. Equipped with plugging alarm
device of filter element of oil filter to remind replacement of
filter element. The oil tank is connected with the outside world
through the air filter to ensure that the hydraulic oil is not
polluted by the outside world. The filtering accuracy of air filter
is 20 micron.
7) The main oil pump and servo motor are arranged orderly on the
oil tank. The high-pressure pump adopts high-quality high-pressure
internal meshing gear pump. The internal meshing gear pump has the
advantages of low noise, energy saving, high-pressure stability and
small heat output.
8) The main hydraulic control system of the equipment adopts the
cartridge integrated valve produced by Shandong Jining Taifeng
Company, which is installed on the thickened tank panel and
connects the valve parts, instruments and pumps through
high-pressure pipelines. The cartridge type integrated valve is
characterized by compact structure, sensitive and reliable action,
strong anti-pollution ability, small liquid flow resistance,
convenient maintenance and long service life. The structure of
two-way cartridge valve mainly consists of cartridge parts, control
cover plate, pilot control valve and integrated valve block, and
slide valve structure.
9) In the hydraulic system of this machine, there are pressure
detection points in key parts. Pressure of each part is measured by
pressure gauge and pressure sensor. Pressure gauge is directly in
the form of pointer system. Pressure sensor is reflected by analog
quantity to PLC through touch screen display. The fault of
hydraulic press can be quickly diagnosed and the working state of
hydraulic press can be monitored through the pressure detection
10) The type of hydraulic oil used in this machine system is
L-HM46# anti-wear hydraulic oil (Party B provides the first
11) Hydraulic tubing is made of cold rolled seamless steel tube and
high pressure hose, which are well-known brands in China. Flange
connection is used for large diameter (inner diameter greater than
20 mm). As far as possible, SAE flange connection is used in
pipeline connection. For butt welding, the welding effect is good
and the oil leakage problem caused by poor welding is effectively
solved. The pipeline is fixed with pipe clamps, reasonably arranged
and easy to maintain. Long-term vibration or activity of the
pipeline all use high-pressure hose for excessive.
12) Servo control and manual pressure valve are used to regulate
the pressure of hydraulic cylinder. Normally, the maximum value is
adjusted manually as safety value, and the reference value is set
automatically by servo control (set value on man-machine
interface). The two modes can be switched freely. (Servo-controlled
acceleration and deceleration of pressure and flow fluctuation is
installed in the system, which can improve the stability of
pressure control.) Pressure under servo-controlled mode is set and
displayed directly on the touch screen. Pressure display accuracy
is 0.1 Mpa, and pressure control accuracy is less than <0.2 Mpa.
13) The top of the tank is equipped with a waste oil collecting
device, which is introduced into the collecting hole. A tank
chamber is designed at the corner of the tank to collect the waste
oil from the storage platform, so as to facilitate regular manual
pumping by users.