Dongguan Shen extruders and Welltec injection molding machines for thermoplastic materials and plastic part injection.

Production of plastic parts, including pins, cores, PVC pipes, and modules.

- Extruder for thermoplastic materials.

Approximate capacity: 20 to 55 kg/h.

Product/Process: Production of plastic cannulas with single screw (55 mm) and vacuum cooling tank.

Manufacturer/Brand: Dongguan Shen.

Model: 55*28D.

Year: 2019.

Two units.

- Injection Molding Machines:

Line 1 Function:

Single-color horizontal injection molding machine for thermoplastic materials.
Approximate capacity: Up to 142 g.
Clamping force: 900 kN.

Product/Process: Injection of plastic parts.

Manufacturer/Brand: Welltec (Model 90Se II, 2019).

Line 2 Function:
Horizontal, single-color injection molding machine for thermoplastic materials.
Approximate capacity: Up to 211 g.
Clamping force: 1300 kN.
Product/Process: Injection of plastic parts.
Manufacturer/Brand: Welltec (Model 130Se II, 2019).

Line 3 Function:
Horizontal, single-color injection molding machine for thermoplastic materials.
Approximate capacity: Up to 298 g.
Clamping force: 1600 kN.
Product/Process: Injection of plastic parts.
Manufacturer/Brand: Welltec (Model 160Se II, 2019).

Line 4 Function:
Horizontal, single-color injection molding machine for thermoplastic materials.
Approximate capacity: Up to 410 g. Clamping force: 1900 kN.
Product/Process: Injection of plastic parts.
Manufacturer/Brand: Welltec (Model 190Se II, 2019).

Line 5 Function:
Single-color horizontal injection molding machine for thermoplastic materials.
Approximate capacity: Up to 543 g.
Clamping force: 2600 kN.
Product/Process: Injection of plastic parts.
Manufacturer/Brand: Welltec (Model 260Se II, 2019).

Line 6 Function:
Single-color horizontal injection molding machine for thermoplastic materials.
Approximate capacity: Up to 707 g.
Clamping force: 3200 kN.
Product/Process: Injection of plastic parts.
Manufacturer/Brand: Welltec (Model 320Se II, 2019).

Machine manufacturing year: All machines (extruders and injection molding machines) were manufactured in 2019.

Line operating time:

Dongguan Shen 55*28D extruders (2 units): used from 2020 to August 2025.

Welltec 90Se II injection molding machine (142 g / 900 kN – 3 units): used from 2020 to August 2025.

Welltec 130Se II injection molding machine (211 g / 1300 kN – 1 unit): used from 2020 to August 2025.

Other injection molding machines (Models 160Se II, 190Se II, 260Se II, and 320Se II): never used.

Line downtime:

Extruders: stopped since August 2025.

90Se II injection molding machines: stopped since August 2025.

130Se II injection molding machines: stopped since August 2025.

Other injection molding machines: never operated (stopped since manufacturing in 2019).

Complete model of machines in the line:

Dongguan Shen extruder – Model 55*28D (2 units).

Welltec injection molding machine – Model 90Se II (3 units).

Welltec injection molding machine – Model 130Se II (1 unit).

Welltec injection molding machine – Model 160Se II (2 units).

Welltec injection molding machine – Model 190Se II (1 unit).

Welltec injection molding machine – Model 260Se II (1 unit).

Welltec Injection Molding Machine – Model 320Se II (1 unit).

- Extruder Line Productivity (PVC pipes):

Immediate production, no post-processing. On average, 800 parts every 15 minutes (equivalent to ~3,200 parts/hour), which may vary depending on product size.

Injection Molding Machine (pins, cores, and modules): Average cycle time of 22 seconds per branch.

After injection, there was a post-production step for branch removal.

Bottlenecks/Intermediate Stock:

Extruder: There were no bottlenecks or need for intermediate stock, as the product was ready to ship.

Injection Molding Machine: There was an intermediate stock of injected parts due to the post-production branch removal process. The injection cycle (22 seconds) was the factor that defined the production rate.

Upper and lower limits of dimensions related to productivity:

The line produced plastic parts ranging from small pins and cores (≈14 g) to larger parts weighing up to 707 g.

For extruded tubes, productivity varied according to diameter/length: up to 800 parts in 15 minutes for smaller dimensions, with a proportional reduction for larger parts.

For injection molding machines, the average cycle time was 22 seconds per branch, varying according to part size and mold cavity.