Pre-Owned Certified Machines

1998 700 Ton Van Dorn, 165 oz. Injection Molding Machine
1998 500 Ton Van Dorn, 59.2 oz. Injection Molding Machine
1999 300 Ton Van Dorn, 40.3 oz. Injection Molding Machine
1998 300 Ton Van Dorn, 40.3 oz. Injection Molding Machine

The process starts with a 42-point inspection of the machine. We review general features and functions of the machine, the hydraulic system, the machine’s surfaces, the clamp assembly, the injection unit, the controller, and a runoff and systems check. See below for details of each inspection.

General Inspection

1 – Machine General Appearance—Note and major defects
2 – Machine Nameplate Visible
3 – Barrel Cover present
4 – Leveling Pads
5 – Operator Gate function
6 – Non-Op side Gate function
7 – Purge Guard function
8 – Drop Bar Assembly
9 – E-Stop Button & Safety Interlocks
10 – Electrical Cabinet Switches
11 – Electrical Cabinet Modifications—note
12 – Note any safety components not present or functional Note any repairs made
13 – Manuals and prints

Hydraulic System Inspection
Verify proper hydraulic operating pressures utilizing calibrated pressure gages. Check the hydraulic pressures utilizing the Machine Set Up document (M.S.U.) if available and/or hydraulic diagram.

14 – Clamp Cylinder
15 – Advance Cylinder
16 – Injection Cylinder
17 – Hydraulic Screw Motor
18 – Hydraulic Proportional Valves
19 – Hydraulic Manifolds
20 – All Pumps (fixed, variable volume)
21 – Pipe and hose inspection. Clean and inspect tank, replace filters/strainers

Machine Surfaces

22 – Moving Platen
23 – Stationary Platen
24 – Tie bars
25 – Platen holes checked and retapped/repaired
26 – Bushing and guide integrity
27 – Heat Exchanger. Acid clean and pressure test

Clamp Assembly Inspections (Hydraulic Clamp Machines)

28 – Check Ram condition, Ram seals. If central lube system note and if functioning.
Toggle Clamp Machines
29 – Check for bushing wear, toggle integrity. If central lube system, note if functioning.

Injection Unit Inspection

30 – Check Screw RPM
31 – Check Profile for velocity, pack/hold, back pressure, and screw recovery to verify is following trace correctly
32 – Slip check test
33 – Verify all zone heats

Controller Inspection

34 – Does controller take inputs and is membrane responsive
35 – All Screens display and readable
36 – Update software as needed
37 – Note hours if available
38 – Machine functions in closed-loop
39 – Note options—hydraulic knockout, corepull, etc.

Runoff and Systems Check

40 – Run in Auto, semi, manual
41 – Extrude plastic
42 – Verify clamp tonnage with mold block

The result after all of this is completed is a “Certified Pre-Owned” Machine backed by StopolES®.

Your machines also come with a 90 day run warranty, including parts and workmanship.

• Horizontal or Vertical
• Trade-ins, demos or repurchases
• Toggle, hydraulic or all-electrics
• Tonnages from 50-2,000

Get performance and productivity at a fraction of the cost of purchasing new.