New hot runner technology for multi-cavity moulds

St. Vincent Injection Molding Industrial Co., Ltd., currently famous for its large and medium hot runner systems (mainly used in the automotive industry), will expand its product range downstream to achieve injection volumes as low as 011 g. A large number of multi-cavity molds for component manufacturing in the automotive, electrical and packaging industries and medical technologies are mostly delivered as hot molds including temperature controllers.

The decisive factor for the expansion of the product range is the development of four new nozzle series, namely the two new 03 series and two 04 series. The 03 and 04 series are equipped with standards of 315 mm and 410 mm in diameter respectively. Flow path diameter. The interior is wide and the exterior is small—this is the main feature of the new product of Synventive. Although the profile is slim and the maximum nozzle length is 186 mm, for size 03 and dimension 04, the range of achievable runner diameters is 215-415 mm and 210-610 mm, respectively. The compact, replaceable heater plays a major role in achieving the above-mentioned very favorable internal and external diameter relationships.

The four nozzle series can be used for a variety of applications. 04 The C01 Series replaces CA Series nozzles that do not use interchangeable heaters. Now, depending on the mold structure, the heater can be replaced either from the front or from the back. 04 The C02 series is a newly developed product with many features that simplify the work of mold makers. For example, the nozzles separate axial and radial positioning, eliminating the need for a major process for the mold maker. The positioning on the plane of the template is plane, so that it is not necessary to adjust the nozzle contact plane at the bottom of the counterbore. The heating and thermocouple cables are laid in the direction of the nozzle and are easily replaced from the front. 03 The nozzles of the C01 and 03 C02 series are in the pre-production phase, one step away from dimension 04. 03 The characteristics of the C02 series of nozzles are: They are screwed into the nozzle support plate from the front end so that they can be completely replaced from the front end without plastic leakage through the manifold.

The HYC2508 hydraulic needle cylinder for the new nozzle series is very compact and has all the important quality features of this proven product range: In order to simplify assembly and increase maintenance speed, the needle height can be adjusted in-situ (±1 mm). The rotary locking of the valve needle ensures that its tip is always precisely positioned – especially important for forming on freeform or twisted surfaces. The patented valve needle cylinder active cooling and oil chamber separation technology achieves high stability and compact structure, supporting designs where space is extremely limited. The important thing to achieve a higher working reliability is that the cylinder is screwed into the pipeline, eliminating the offset between the cylinder and the piping caused by thermal expansion. In 2006, the pneumatic type of the cylinder will be used to meet the clean room conditions.

Due to the fact that multi-cavity molds only deliver wiring and piping to complete thermal mold halves, Synventive offers highly efficient temperature controllers. This makes it possible to provide a complete and tested system that can be used immediately.