Seiki Valve Gate System
Our valve gate system has a “Topless” design. The valve
pin shuts off directly to the gate in the cavity. There
are two types of systems: a single heater system and a
double system. The single heater system uses the body
heater only to control the temperature. The double
heater system has a body heater and a probe tip heater
to gain a separate control over the temperature around
the gate.
Features
“Topless” structure, -- the gate is cut directly into
the cavity in order to the most cooling. With a double
heater system (the probe has separate heaters for a tip
and a body), the tip heater synchronizes the molding
cycle to employ the intermittent heating method. This
system also facilitates the molding of the crystalline
resins.
Advantages of runnerless molding
Utilize the material to the fullest. 100% of the
material is processed in to the product.
No need for secondary processing.
Shorter molding cycle improves profitability.
Stabilize the quality of the product.
Automated molding process contributes to the operation
stability.
Solves other problems such as:
Resin leakage, gate clogging, stringing, drooling,
resin deterioration, gate balance etc.
Spear
The spear has a double heater structure consisting of a
tip heater and a body heater.
The spear tip has been modified to directly heat itself.
There are a large variety of spears available to
accommodate different resin types and applications.
Overall structure of the Spear System
The spear system consists of a spear (embedded into
the die), a manifold, and a controller for output
(temperature) control.
Principle and Features of the Spear System
The resin at the sprue and runner is kept molten to
maintain constant fluidity. Depending on the temperature
of the gate land and a die, a very small amount of the
resin solidifies along with the resin inside of the
cavity. After the molded product is removed, the spear
tip is heated up to instantly melt the solidified resin
at the gate land just before the next injection.
CVN Series
Features
1.
The diameter of
gate can vary from Ø0.8~6.0.
2.
The tapper pin
is applied in accordance with standard gate
bush.
3.
The clearance
between sleeve bush and valve pin is
strictly managed to avoid resin flowing
back.
End-Product
-
It is applied to various engineering
plastic.
SST
Series
Features
1.
it is applied to various
engineering plastic.
2.
The gate
diameters are mainly
Ø3 and Ø4, a normal or
inveted cylinder unit and a center gate type
or multi-point type with a manifold.
3.
The “ steady brace
mechanism” for the valve pin and air driving
system prevents abrasion and breakage of the
gate of the mold and the pin.
4.
With using higher quality
of the valve pin, it ensures good appearance
of the gate mark.
5.
With using the
cylindering valve pin, and the low-pressure
system to control the switches of the pin,
abrasion and breakage of the gate of the
mold and the pin are prevented.
6.
No resin is shed by
strictly quality control of the clearance
between the valve pin and sleeve
End Product
-
Cover
-
Multi-point
typed Product
Type SVP - Standard valve
Features
-
Suitable for a wide range of molding process
using general resins to general engineering
plastic.
-
Addition of the Tip heater system (optional)
makes this valve to be very effective for
molding reinforced resins and crystallized
resins (PET pre-form).
Uses
- Exterior parts (case, cover).
- Mechanical parts.
- Large molded parts which require multiple gates.
SVY - Simple Flow valve
Features
-
Prevents the resin from deterioration and
contamination due to the split flow.
-
Great color changeability.
Uses
- Exterior parts (case, cover).
- Multiple color product.
Type SVPL - Single valve Features
SVP type with a center gate., Exclusively for a
direct gate operation (single molding). By adding a
manifold, it is suitable for multi molding also.
Uses
- Automobile parts.
- Bumper.
- Large molded parts.
Type SV32 - Compact valve Features
-
Available to minimum 32mm gate pitch.
-
Steady Brace system is equipped on the valve
pin.
-
Suitable for general resins and general
engineering plastic (POM, PC, ABS, PA etc.)
The common body is controlled by close loop
system.
SPT Series
Features
1.
The
newly-developed external heating topless
probe is equipped with a tip heater.
2.
It can be used
for multiple cavity mold as well, taking
advantage of its compactness of minimum 7mm
pitch.
3.
Unlike a
conventional block method, gate lay out can
be arranged very freely.
End Product
-
It is best
suited for molding high-function plastics
for extremely-small mechanical parts.
-
It is best for
continuous strip molding or small electronic
parts molding.
Type ESP - The internal tip heating spear has
evolved to the
external heating system
Features
-
Tip heater contributes to smooth gate
opening with a continuous output control.
-
External heating system controls the
temperature of the body runner to provide
the FIFO system that maintains minimum
pileup to prevent the resins from
deterioration and contamination.
Type ESN - Central Flow type with external heating
system
Features
-
Minimum resin content and FIFO system
prevents the resins from deterioration and
contamination.
-
Many tip selections according to the resin.
-
Best suited for commodity resin.
Uses
- Commodity
- Caps
Type D - Multi-purpose system Features
-
Suitable for a wide range of the molding
operations from small products to large
products.
-
Suitable for multiple cavity moldings.
-
Suitable for general engineering plastic.
Uses
- Appliance parts.
- Various case parts.
- Engineering plastic functional parts.
Type G - Minimum resin pile up Features
- External heating system contributes to a high
injection rate.
- Perfect choice for multi colored products.
- Perfect choice for the highest quality of
engineering plastic.
Uses
- Mechanism parts.
- Super engineering plastic parts.
Type I - Suitable for Multiple Cavity molding
Features
- Multiple tip style --- 8, 12 or 16 tips on one
block body.
- Very small pitch (15mm) can be processed.
- Multiple cavity molding can be easily processed.
Uses
- Protector.
- Battery parts.
- Medical equipment parts.
Type B - Smoother resin flow, suitable for large
molding products
Features
- Smooth resin flow.
- Good heat stability.
- Insert it into the manifold to use.
Uses
- Mechanism parts.
- Super engineering plastic products parts.
Manifold - Example of the bridged manifold
-
Our Manifold achieves superb energy savings
while striving for a lighter weight design
without compromising the main function.
-
Tubular heater is adapted as we value the
temperature distribution.
BOSS（Bolt on Seiki System）
Fast Delivery and Low price
Features
-
We deliver on the same day that your cavity
is ready so you can try it immediately.
-
Pre-assembled and pre-wired at our factory.
Rigorous quality checks on the system before
delivery.
-
Machined by a machining center ensures the
greater accuracy of the system.
Type of the Controller
Type TP
:
Controls STT and ST Spear series, body output 32V,
and Tip 11V.
Type VP
:
Controls SH Spear, our SVP, SVY and SV32 Valve
systems and other manufacture's
systems.
Type NP
:
Controls S series spears such as Type I.
Controller SMC
Series
Features
1.
The compact
controller can be installed even on a
molding machine.
2.
It features a
monochrome touch panel display which
improves visibility and operation
performance.
3.
Its original
control techniques prevent a possible
temperature overshoot at start-up.
Type S2000 - High performance digital controller,
suitable to control Valve / Spear system and other
manufacture's system
-
Easy to handle Windows like drop-down menu
and a large display.
-
Current closed Loop Control an Voltage
Compensation Circuit contribute to stable
molding regardless of the power condition.
-
In compliance with CE Mark. Designed to
resist disturbance noise while it doesn't
produce radiated noise.
Wide Screen - Large Color Entry Unit for
S2000 Controller
-
12.1-inch screen (800 x 600 dot) is capable
to display the data on 8 manifold zones and
16 probes. (It's 6.25 times more data than a
standard screen display.)
-
256-color TFT LCD presents realistic and
graphical user interface.
Type VMC – General 200V / 240V Heater Controller
LCD touch panel - bigger and better screen -
for easy handling
Compliance with EMS / EMI of EN Standard
-
Resistant to disturbance noise
-
Reduction of noise emission Equipped
with Soft Pulse Output Control*.
-
Easy on heaters.
Stabilize molding production
Type AHC
2 models of compact controller are available for
small-cavity-number molding to control Valve system and
Spear system.
Conventional HC type (for Valve) and AYC type (for
Spear) were integrated into this new controller
type.
-
The two models of controller are available for
controlling Seiki’s almost all Valves and Spear
probes.
-
Their common type of display improves operationality
and service-parts compatibility.
Upgraded controller
-
Quick-blow fuses equipped in all output circuit
phases prevent in-circuit damage of semiconductors.
-
15bit Analog to Digital Converter is incorporated in
the temperature-measuring circuit.
Air Controller
SMA4 series
Features
1.
It can control up to 4
valve gate circuits individually.
2.
It is suitable for special
molding such as two-color molding.
3.
With touch panel screen
manually opens and closes all valves
simultaneously or automatically open/ close
each valve individually. Opens the valves
manually at the start up and checks the
valve function easily.
