Hot Runner Systems

GÜNTHER Heisskanaltechnik GmbH is a well-known name and has their own niche in the market place with ground- breaking technical innovations with the highest standards of quality & precision.

GÜNTHER is often called as "Gunther is my supplier of choice" by the customers.

Gunther GmbH is the only company who satisfies demanding customized solutions. As a specialist, Gunther holds a number of patents to meet all the requirements. 

The major benefits of Gunther Hot Runner Technology are:

  • Optimal temperature control
  • Uniform pressure distribution
  • Good gate quality
  • Side gating without "cold slug"
  • Cost effective manufacturing
  • High production reliability


Downloads
Catalogue 1

Hot Runner Nozzles

Standard hot runner nozzles for direct gating from 0.0189 to 5 kg per nozzle.

If required, the modular nozzle design allows quick replacement of components. Hot Runner NozzleThe two-stage shaft (patented) with varying design features assures outstanding insulation in the front area of the shaft and guarantees the lowest possible heat loss between hot runner nozzle and cavity. 

The individual nozzles of the series SET and DET, due to their extended nozzle head with increased heating output, are also suitable for applications with thermally sensitive materials. This means problem-free processing of technical high-temperature plastics.

Needle Valve

Valve-gate systems
The modular nozzle design allows a rapid replacement of components when required. The two-component shaft (patented) with varying design features assures excellent insulation in the front area of the shaft and the least possible loss of heat between the hot runner nozzle and the cavity.

Where requirements are high in terms of appearance, reduced cycle times, minimum shear stress and large gate cross-sections, valve-gate technology provides the solution. 

Replaceable Valve Pin Guides
The new innovative design of the contouring needle guide and the optimised valve-gate needle allow non-contact and low-wear gate closing. The PM needle guide made of metallurgical powder steel ensures economical and virtually wear-free operation. While closing the needle is first centered through a tapered guide until it lowers precisely into the cylindrical guide.

Another advantage is the separation of needle guide and material tube, which means that any necessary change of needle guide is a simple procedure. Gate diameters of 1.0 mm to 4.0 mm are selectable. 

Type LA
The needle is centred by means of a conical guide, until it fully and precisely enters the cylindrical guide (to the axis of the gate bore). 

Advantages:

  • Long service life, since virtually no wear
  • Replaceable needle guide
  • Needle guide immerses to the article and is contour-shaping
  • Recommended for wearing materials
  • By exchange of the PM pieces, the optimized shut-off needle can enlarge or reduce the gate Ø without reworking the mould nest. The exact needle guide achieves a virtually wear-free seal and a clean gate without burrs.
  • Tightest tolerance between the needle guide and the gate.

Special Nozzles

Multi-tip nozzles
The hot-runner nozzles for side gating give you the ideal scope in designing your hot-runner systems. Optional: Nozzle tips made of wear protection for processing filled materials.

26LHT hot-runner nozzle with up to 4 tips for side gating under 90° without cold slugs, in combination with a manifold. The individual nozzle tips cannot be influenced directly. With divided inserts! 

Hot-runner nozzle OktaFlow® type OMT with 8 tips for side multi-tip gating (under 90°) without cold slugs. Optimum temperature development thanks to heating in the nozzle tip area. Cost-efficient, that undivided inserts. Hot-runner nozzle OktaFlow® can be used as a single nozzle with heated adaptor.

Hot-runner nozzle PektaFlow® type PLT with up to 24 tips for side multi-tip gating (under 90°) without cold slugs. Optimum temperature development thanks to heating in the nozzle tip area. To require divided inserts. Hot-runner nozzle PektaFlow can be used as a single nozzle with heated adaptor. 

Vertical gating
The hot-runner nozzles for the vertical gating were developed to give you the optimum scope in designing your hot-runner systems.

The 26ZET single nozzle with up to 4 tips allows high quantities of cavities while avoiding complex control engineering. The individual nozzle tips cannot be influenced directly.

Manifolds

In a compact service package we provide you with all the engineering drawings and documents in addition to the individual components of your hot runner system. Pressed-in 230V heating elements ensure optimal heat KCP4transfer in the manifold providing for an even temperature profile. The thermocouple is mounted closely to the material tube for precise temperature control. The conventional 230V manifold offers the best prerequisites for hydraulic balancing.

The following Manifolds are already available:

  • Straight Manifold
  • H-Manifold
  • Cross Manifold
  • Star Manifold
  • T-Manifold


Downloads
Catalogue 1

Rapid Systems

With the new Rasant manifolds, GÜNTHER Heisskanaltechnik offers tool and mould makers a complete system with a delivery time of 2 weeks.

The complete systems comprise the manifold with insulating plate, connection piece incl. titanium insulating ring, flush-mounted thermocouple, pressure pads, nozzles with wear protection and corresponding lengths, power and thermal probe cables and spacer. 

Advantages:

  • Random choice of gate dimensions in defined areas
  • Fully balanced
  • Optimal heat distribution to the manifold
  • With insulating plate
  • Nozzles with outstanding thermal separation
  • Nozzle tips protected against wear
  • Short delivery times

Needle Actuations

The needles can be moved with single valve gate nozzles and in multiple nozzle and manifold systems with 

  • Electromagnet
  • Single needle valve
  • Lifting plate
  • Sliding plate mechanism

Special holes in the mould clamping plate allow the depth of the shut-off needles to be adjusted individually from the outside. 

Elektromagnet ME 10/UV 75
Electric drive for valve-gate systems. 

The compact drive mechanism is designed for valve gate systems with drive in the clamping plate. Up to 4 needles can be controlled simultaneously and very precisely by means of an external controller (eValveControl-4). Option of 8-drop parallel operation.

  • For all-electric injection moulding machines
  • Unrestricted clean-room suitability
  • Maintenance-free

Control Technology for Hot Runner Systems: Safe and Comfortable

1, 2, 3, 5-channel temperature controllers DP1, DP2
The compact controllers for economical and comfortable control of small hot runner systems.

  • Total connected value 1-phase 230 V 16 A
  • Fuzzy PID control behaviour
  • Set / actual display for each control point
  • Gentle softstart function
  • Pulse group control
  • Power limitation
  • Temperature reduction during production breaks
  • Regulated operation in case of failed thermal probe possible
  • Counter for hours of operation
  • Continual error monitoring

 

Multi-channel temperature controllers DPT5, DPT10, DPT15, DPT20, DPT45
The multiple controllers of the DPT series offer extensive functions for the safe control of complex hot runner systems.

  • Four selectable temperature programs
  • Fuzzy PID control behaviour
  • Gentle softstart function
  • Control-TechnologySet/actual display for each control point
  • Limited power during start-up
  • Start-up ramp for even heating of different heating circuits
  • Phase control and pulse group control
  • Temperature reduction during production breaks possible
  • Regulated operation in case of failed thermal probe possible
  • Diagnostic function for detection of wiring errors
  • Up to 3500 W per control zone
  • Counter for hours of operation
  • Continual error monitoring
  • Connectors of thermocouples and heating elements physically separated
  • Retrofitting of up to 15 control zones is feasible
  • Optional with serial interface for connection of injection moulding machines by ARBURG, ENGEL, KRAUSS-MAFFEI, FEROMATIK, etc.

 

Multi-channel temperature control cabinet DPT multi zone for operation with multiple tools with a high number of cavities.

This new development especially for the operation of multiple tools with a high number of cavities offer a comprehensive range of functions:

  • Expandable from 40 up to 150 control circuits (in steps of 5), the LCD touch-screen display guarantees the simplest operation for highly complex tools.
  • The control is executed by means of a Windows software.
  • Graphic tool display with freely moveable display fields.
  • Full-text error messages.
  • Log files for monitoring errors and status.
  • Possibility of managing two tools separately.
  • Print function for temperature records.
  • Various remote maintenance possibilities via standard PC interfaces.

 

Controller eValve-4
The controller "eValve-4" is able to control up to four bistable electromagnets, which are used for nozzles with needle valve. The electrical lift magnets generate a mechanical lift of 10 mm. The two end position are fixed with permanent magnets. Electric power is only used for changing the position of the magnetic fixed lifting cylinder.



Hot Halves

"Hot halve", ready to install with many advantages.

Efficient and economical. 

Complete tool halves for all branches avoid installation errors, reduce project planning complete-hot-half-20464-2811909expenses and maximize the performance of GÜNTHER hot runner systems. 

Naturally, we also develop customized solutions for very specific applications, such as 16-, 32- or 48-cavity moulds, multi-component or valve gate technology. We will supply,from the top edge of the article, a complete tool half with height-adjusted hot runner. 

Completely wired and function-tested by us. With this ready-to-install solution, you are able to avoid extensive balancing work and possible installation errors. You are able to choose between straight manifolds, H-manifolds, cross-over manifolds, star manifolds or T-manifolds.