Herzog Japan

Type TSN is a spring-actuated needle-type shut-off nozzle used for molding thermoplastic resins, especially low-viscosity resins such as PA, PPS, PE, POM, and PP.
The nozzle is opened by injection pressure and closed again by spring force. The needle moves coaxially with the body and is normally held in the closed position by spring force. In the initial position, the nozzle orifice is normally closed. Rising molten resin pressure acts on the surface of the needle, causing it to retract at 200 bar and the nozzle to open. As the molten resin pressure decreases (≤ 80 bar), the needle is propelled forward by spring force and the nozzle is closed.
The nozzle can be backed up while the resin is being metered, thus reducing the cycle time per shot.
And it is possible to suppress the transition of heat from the nozzle heater to the mold. This helps prevent defects such as cold slugs and sprue breaks in the middle of the mold.
In addition, the nozzle can be purged in the same manner as an open nozzle, making it extremely easy to maintain.

In this HP type (hydraulic-pneumatic machine needle shut-off nozzle), an integrated actuator (pneumatically and water-cooled/hydraulically driven) drives a needle mounted coaxially with the nozzle by a link mechanism. Molten resin is reliably shut off at the nozzle orifice. However, the design ensures safety by automatically opening the nozzle and opening the flow path when excessive pressure is applied. The application of tip extension modules, filters, and gas-assisted processes broaden the range of applications for the shut-off nozzle.
This nozzle can be independently controlled to open and close the nozzle regardless of fluctuations in resin pressure. It can be used for special applications such as physical foaming (Mu-cell).
The compact design and easy-to-replace parts ensure long-term use.
As an option, a resin filter and mixing element can be added to our shut-off nozzles.

This BHP type (hydraulic-pneumatic machine bolt type shut-off nozzle) standard shut-off nozzles have enjoyed the benefits of the shut-off action of molten resin in the nozzle, such as reduced cycle time, etc. The BHP nozzle has a larger diameter flow path than the conventional needle type shut-off nozzle. The BHP nozzle is designed to provide a larger diameter flow path than conventional needle-type shut-off nozzles. This allows for a much larger flow path and reduced pressure drop compared to needle shut-off nozzles. The simple single-channel design also avoids the parallel flow seen in needle shutoff mechanisms. The single-channel system allows the unit to be cleaned very quickly (similar to an open nozzle) compared to a needle shutoff nozzle.
In addition, the increased back pressure improves usability (homogeneity) and reduces cycle time, contributing to higher productivity. This makes this nozzle effective in shortening cycle time and suppressing stringiness and fluttering when used in combination with a thermal hot runner. This nozzle is effective in the production of food packages, etc.
A resin filter and mixing element can be added as an option.

Pneumatically controlled nozzle type NE (used for liquid silicone L.S.R., etc.) uses a needle-type shut-off mechanism to stop liquid resin directly at the mold interface. For rubber, liquid silicone rubber, and other elastomers, the integrated cooling system provides constant temperature control throughout the nozzle, enabling shut-off without premature vulcanization. The nozzle is also available with an optional replacement tip for cold channels.
The NE type nozzle is suitable for processing injection pressures up to 3,000 bar and injection rates up to 500CC. The improved design allows for easy cleaning and installation. The flow of the melt has been optimized, resulting in reduced resistance of the elastic plastic being processed.
The product is manufactured from corrosion resistant materials and tip lengths can be customized.

In this SEN type, elastic plastic (used for liquid silicone L.S.R., etc.) controls the opening and closing of the shut-off mechanism with a compactly designed pneumatic cylinder. The nozzle tip is equipped with a cooling system distributed all the way to the tip of the nozzle tip. These systems function reliably and support stable operation. The materials used are special materials with high corrosion resistance.
The nozzle controls vulcanization and liquid resin flow within the nozzle to ensure a clean and reliable shut-off. This nozzle can also be used for hot molds and cold channel molds that do not have a cooling system.

Herzog filter nozzles are primarily used in the injection molding of resins. Herzog filter nozzles are compatible with virtually all thermoplastic resins, including PE, PP, PS, ABS, and PA, and can change the direction of molten resin flow during processing. This leads to improved homogeneity.
The simple design of the filters developed by Herzog allows for a robust and reliable design and short setting times. Therefore, Herzog developed this F-type gap filter with the goal of being compact. As the molten resin passes through the gap, particles larger than the gap remain in the inlet duct. These particles can be easily removed during purging by our uniquely designed flushing system. We have also developed the FN type as a hole screen filter.
Regarding the function of our filter nozzle, molten resin is introduced into the filter through a well-defined flow path (red) and flows through it. Foreign particles larger than the hole or gap are retained in the guide duct. After passing through the filter, clean molten resin flows through the orifice into the injection mold.

In resin molding, various materials with different viscosities and flow rates must be mixed and dispersed. The design of this mixing element has no moving parts and requires no external driving source. The size and number of elements are determined by the individual required mixing degree. Installation does not require any coordination with the machine side and is completed by simply replacing the current nozzle.
This product is effective in reducing resin color irregularities, temperature irregularities, and masterbatch volume. Our mixing nozzles contribute to quality improvement and reduction of defect rate by improving mixing performance of resins.
In addition, our mixing nozzles can be disassembled for easy maintenance and replacement of parts, making them cost-effective products.