What kind of machine should you actually put on your bench?
When you're shopping in plastics rubber processing machinery, the practical question is usually not whether injection molding works, but which compact format fits your bench and your runs. Small-scale plastic molding sits at the intersection of laboratory research, prototyping, and low-volume production. The hard part is deciding whether you need a semi-automatic pneumatic press, a more hand-off benchtop unit, an auxiliary pellet dryer, and whether your shop can feed 110V or 220V power. This guide compares four listed machines across that range, from a budget extruder to a top-priced desktop press, plus a dehumidifier that fills a different slot in the process.
Quick take
- The vertical machine labeled 20g is the lowest-cost way to start with a pneumatic vertical press.
- The HayWHNKN® 220V model is the highest-priced listed benchtop press.
- The Intbuying 110V model is the mid-priced lab-oriented molder.
- The Maisutseb® unit is a pellet dryer rather than an injection press.
Listed price comparison
Listed prices run from USD 759.99 to USD 5,211.80. The bars show the relative spread when the highest listed price is treated as the full bar.
| Product | Listed price | Relative price |
|---|---|---|
| Vertical Injection Molding Machine Semi-Automatic Pneumatic Plastic Extruder 20g | USD 759.99 | |
| 110V Lab Desktop Vertical Pneumatic Plastic Injection Molding Machine 1KW | USD 1,821.60 | |
| 220V Plastic Pellet Material Dehumidifier Special for Injection Molding Machine | USD 4,500.00 | |
| 220V Vertical Injection Molding Machine 1KW Pneumatic Desktop Plastic Moulding | USD 5,211.80 |
How to choose: decision matrix
| Use case | Listed option that fits | Why it fits |
|---|---|---|
| First molding experiments with an existing air compressor | Vertical Injection Molding Machine Semi-Automatic Pneumatic Plastic Extruder 20g | Semi-automatic pneumatic action plus compatibility with common soft plastics |
| Automatic sample runs in a 220V shop | 220V Vertical Injection Molding Machine 1KW Pneumatic Desktop Plastic Moulding | 220V desktop press with 1KW heating and dual-zone temperature regulation |
| 110V lab prototyping and R&D | 110V Lab Desktop Vertical Pneumatic Plastic Injection Molding Machine 1KW | 110V input with lab-focused single-shot pneumatic molding |
| Reducing moisture defects in an existing molding line | 220V Plastic Pellet Material Dehumidifier Special for Injection Molding Machine | Dries pellets to reduce bubbles, silver streaks, and strength loss |
Product notes
Vertical Injection Molding Machine Semi-Automatic Pneumatic Plastic Extruder 20g
At USD 759.99, this semi-automatic pneumatic vertical extruder is the lowest-priced machine in the group. It is built around a simple hand-disassembled mold concept, so you can swap molds and reuse the same base for different shapes. The adjustable heating range goes from 0 to 350°C, which gives you room to work with soft plastics such as PP, PE, ABS, PS, PA, PET, TPU, and PVC. You will need to bring your own air source, and the recommendation is about a 30L/500W pump with 0.65-0.85 air pressure. If you are already set up with a compressor and want a hands-on, low-cost way to make sample parts, this is the most direct entry point. Its limits are the semi-automatic workflow and the need to handle molds manually.
220V Vertical Injection Molding Machine 1KW Pneumatic Desktop Plastic Moulding
Toward the other end of the price scale, this HayWHNKN® unit lists at USD 5,211.80. It combines 220V power with 1000W heating and a vertical pneumatic drive, and the control panel adds automatic operation, independent digital displays for timing, and dual-zone temperature regulation. The unit delivers a 40g maximum shot volume and 1-ton injection pressure, which positions it for laboratory testing, sample prototyping, and small-batch production rather than occasional hobby use. It supports common thermoplastics including PP, PC, ABS, PET, and PVC. The trade-off is straightforward: you pay the highest listed price in the group, and the 220V requirement means you need the right electrical supply in your workspace.
110V Lab Desktop Vertical Pneumatic Plastic Injection Molding Machine 1KW
Intbuying's vertical molder sits at USD 1,821.60. It is a 110V desktop unit with 1KW power and pneumatic driving, engineered for laboratories, R&D teams, and short production runs. Temperature and pressure can be adjusted, and the supported materials list includes ABS, PP, PE, PVC, and PA. For anyone working on a standard US 110V circuit, this is listed as 110V, while the other voltage-stated injection molder here is a 220V model, so it fits benches without a 220V line. The design targets lab work and small-batch production rather than continuous output, and it lands between the budget extruder and the top-priced press.
220V Plastic Pellet Material Dehumidifier Special for Injection Molding Machine
Maisutseb® lists this 220V device at USD 4,500.00 as a dehumidifier, not a molding press. It is meant to sit beside an injection molding line and dry plastic pellets before they go into the machine, using low-dew-point dry air to pull surface moisture out of the material. The intended benefit is fewer molded-part defects such as bubbles, silver streaks, and reduced strength. The compact design is described as easy to integrate with existing injection molding gear. If you already own a molding machine and moisture is hurting part quality, this addresses a real production bottleneck. The catch is that it does not create parts on its own, so for a first-time buyer, the money might be better directed toward a molding machine first.
Final recommendation by use case
- First molding experiments with an external air pump: the Vertical Injection Molding Machine Semi-Automatic Pneumatic Plastic Extruder 20g is your low-cost starting point.
- Automatic sample runs in a 220V workspace: choose the HayWHNKN® 220V Vertical Injection Molding Machine 1KW Pneumatic Desktop Plastic Moulding when automatic control makes more sense than keeping the purchase price minimal.
- 110V lab or R&D bench: pick the Intbuying 110V Lab Desktop Vertical Pneumatic Plastic Injection Molding Machine 1KW for a 110V-friendly lab molder.
- Existing molding line with moisture defects: add the Maisutseb® 220V Plastic Pellet Material Dehumidifier Special for Injection Molding Machine after the press is already in place.
