Model 2001 GW PLURAL - 4 Pages

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Model 2001 GW PLURAL

Catalog excerpts

Model 102-450 2001 GW PLURAL COMPONENT SPRAY GUN GENERAL The 2001 GW gun is a lightweight, hand-held, plural component spray gun for spraying limited applications of two-component materials, such as gel-coats or polyesters. The spray gun is operated in the conventional manner. The trigger action starts, and stops, the spray of both materials simultaneously. The two materials exit separately as an atomized spray from their respective nozzles and impinge on each other approximately 6" in front of the gun (resin) nozzle. Here, the resulting turbulence insures intimate mixing. The “base” resin is “cured” by addition of a curative (catalyst) in a required ratio. In the 2001 GW gun, ratios of approximately 10:1 to perhaps 33:1 are possible by extending the curative with a compatible diluent. Preferably, the resin should be supplied from a pressure cup mounted either on the gun or located remotely from it. In some applications, a siphon cup may be acceptable. The curative is supplied from a siphon container assembly (57) mounted directly on the gun. Air, diverted from the gun handle, passes through the air adjusting valve (39) to the nozzle body (55) to provide the siphon action and to serve as atomizing air for the curative. The adjustable fluid control (44) meters the flow of curative. SINCE THE CURATIVE CONTAINER IS A SIPHON DEVICE ITS VENT HOLE MUST ALWAYS BE KEPT OPEN. THE VENT HOLE IS LOCATED IN THE COVER AT THE REAR (SEE ILLUSTRATION). NOZZLE CHARACTERISTICS AND SPRAY PATTERNS The 2001 GW gun uses external atomizing nozzles* to produce finer atomization and better control of the spray pattern. The pattern can be changed from round to fan and to all intermediate shapes by adjusting the side port control (16) on the gun. The pattern also can be rotated to any position in 360º by loosening the retaining ring on the nozzle (1). Intimate intermixing and distribution of the curative within the primary material is maximum when the long dimension of the fan spray pattern is vertical (lined up with the gun handle). The resin delivery rate of external atomizing nozzles is in the low to medium range. See “Important Adjustment Note” page 2. RESIN VOLUME OUTPUT Resin output is controlled by two variables: 1. Nozzle orifice size, air or resin. 2. Air and/or resin pressures. Precise resin pressures can best be controlled by a fluid regulator, tank, or pump pressure. Minute adjustments in flow can be made with the control screw (21) which restricts the travel of the resin needle (19). CURATIVE VOLUME OUTPUT Output of the curative is controlled by four variables: 1. Curative nozzle orifice size. 2. Air adjustment control (38). 3. Adjustment of needle stem (44). 4. Extending (diluting) the curative. *Where atomization occurs entirely outside of the gun. NOTE The curative and resin mix with each other outside of the gun. Purging of the gun and nozzles is not necessary as catalyzed resin never enters the gun passages. VOLUME RATE OF FLOW CALCULATIONS RESIN: With atomizing air off and with resin pressure on, dispense resin into a graduate or into a clean container (resin can be reused) for 15 seconds. Multiply this volume of resin by four to determine volume rate of flow per minute. Increase or decrease resin pressure as required to obtain desired volume rate of flow. CURATIVE: Turn off resin supply to gun. Fill the container (49) with a measured amount of curative (a substitute fluid may be used such as a solvent or water.) Depress gun trigger and spray until fluid starts to “spit”. Check elapsed time and calculate volume rate of flow per minute. Repeat sampling, after resetting air adjusting valve (39) and/or needle stem (44) to obtain desired flow. Curative (residual less diluent) to resin volumetric ratio is specified by the chemical manufacturer. With polyesters, for example, the ratio usually is from 1/2 percent to a maximum of approximately four percent. These ratios are based on theoretical requirements, and laboratory samples of about one pint (500 cc) that cover minimum surface areas. However, spray applications cover maximum surface areas. For this reason, and because of loss of exothermic heat and, perhaps, some loss of curative in overspray, it is suggested that spray samples be made, and that optimum cure times be established by increase or decrease in the volume of curative. It should be noted that the air valve (29) is designed to open slightly before the resin valve (19). The air valve also allows the curative to flow before the resin does. For this reason, air Continued on page 3 Replaces Part Sheet 2353R-2 Part Sheet 2353R-3

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Binks Model 2001 GW SPRAY GUN NOTE 16 Item 60 is to be fitted between air valve (39) and elbow (56) when a siphon cup or pressure cup is utilized. 14 15 12 13 12 11 10 9 34 33 6 19 21 5 18 4 8 3 38 20 2 37 36 7 35 23 39 60 31 24 32 56 17 22 41 42 43 28 40 30 59 27 1 25 26 55 54 29 53 44 52 Loosen Swivel Nut for Vertical Adjustment Position vent at rear Horizontal Adjustment Axis Vertical Adjustment Axis Horizontal Adjustment Arc Vertical Adjustment Arc 51 NOTE IMPORTANT ADJUSTMENT NOTE Do not apply force to valve (39) when adjusting catalyst bottle assembly (57). Do not force by hand. Doing...

 Open the catalog to page 2

Binks Model 2001 GW SPRAY GUN Continued from page 3 resin nozzle. These parts are precision machined and any damage to them will cause a faulty spray. If either the air or resin nozzle is damaged, the part must be replaced before a perfect spray can be obtained. FLUID PACKING REPLACEMENT Remove resin control screw (21), spring (20) and needle (19). Remove resin packing nut (31) and remove old packing (32) with a small stiff wire. Insert new packing (oiled lightly) and reassemble in reverse order. To “set” packing, insert needle (19), tighten packing nut (31) until needle movement is...

 Open the catalog to page 4

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