Machine Nozzles
12Pages

Catalog excerpts

tr.row {} td.cell {} div.block {} div.paragraph {}

Improve Melt Quality... Reduce Downtime! > Heat pipe technology is your assurance that every Synventive Nozzle will automatically operate at the optimum processing temperature;never too hot, never too cold. Synventive Heat Pipe technology transfers heat at uniform temperature from machine barrel to nozzle tip, eliminating hot spotsӔ which cause process variables.Many Synventive Nozzles are completely heaterless. Others require a single band heater which is placed in a safe location at the back of the nozzle (machine end). The absence of multiple heaters and associated electrical hardware...

Open the catalog to page 2

Heat InputCondensate Liquid FlowCapillary WickEvaporationVapor Transport SectionUniform Heat OutputCondensation 20sec. 100 c100 20min. а c100 c100 а c Ambient80 c100 а c (boiling water) Heat PipeSolid Copper > PRDMMNNA3

Open the catalog to page 3

Heaterless. Special Processing ConsiderationsNylon > Recommended for use with all general purpose plastics being processed at 343 C [650 аF] and below.Synventive Nozzle threads directly into machine barrel. Nozzle will operate at the same temperature as the last zone on the barrel. Type AP, M and F are available as heaterless nozzles. Similar to conventional nozzles, Synventive Nozzles require special attention when processing nylon.Due to nylons very narrow temperature processing range, tip drooling or freezing are common processing problems. Consistent reliable processing of nylon can be...

Open the catalog to page 6

PVC Nozzle Installation > Because of the temperature uniformity inherent in all Synventive Nozzles, they are the ideal choice for processing PVC, which is an extremely time/temperature sensitive material. All Synventive Nozzles for PVC are made from stainless steel to resist corrosion, and one heater band and thermocouple are recommended. Synventive offers specific processing guidelines for running PVC through a hot runner system.For a copy of these guidelines or more information on processing PVC, contact Synventive. As with conventional injection machine nozzles, good installation...

Open the catalog to page 7

Nozzle Filters Removal and Cleaning Installation > Recommended for use whenever a high quality filtered melt is desired, e.g., whenever processing with a hot runner system. Also, the use of filters is highly recommended whenever regrind is added to virgin resin and when mold cavity gates are very small.Synventive Nozzle filters offer a simple, effective, and low cost way of preventing tramp metal and other contaminants from clogging gates or entering the mold. The channel and groove configurations of the filter insert have been optimized for maximum flow at minimum pressure loss.These...

Open the catalog to page 8

Start-Up > 2. If the Synventive Nozzle is threaded into a hot barrel, there will be a waiting time, depending on the length of the nozzle, until the operating temperature is reached (see installation procedure, page MN8). Nozzles under 250 mm (10 inches) long will generally take 15-20 minutes to reach operating temperature, nozzles 250 mm [10 inches] to 533 mm [21 inches] will take 20-40 minutes to reach operating temperature. DO NOT USE OXY-ACETYLENE EQUIPMENT ON SYNVENTIVE NOZZLES! > Sufficient soak time must be given to allow the Synventive Nozzle to reach operating temperature prior to...

Open the catalog to page 10

HOTNozzle Tip Hot Runner System Inlet GOODBAD GOODBAD Occurrence of a Cold Nozzle > 1. Check machine barrel end and adapter, if applicable, to ensure proper processing temperature for the plastic being processed.2. Measure temperature of nozzle at the wrench flats and again at approximately 1 back from the tip end. NOTE: DO NOT MEASURE ACTUAL TIP TEMPERATURE. REMOVABLE TPS ARE DESIGNED TO OPERATE AT LOWER TEMPERATURES TO PREVENT DROOLING. Nozzle temperatures should be 15԰F- 25F lower than barrel/adapter.3. With nozzle away from mold, make an air shot to confirm nozzle tip is not obstructed...

Open the catalog to page 11