Views: 0 Author: Peter Cui Publish Time: 2026-06-03 Origin: Mitour Silicone
TL;DR — Mitour Silicone operates a 4,500 m² production facility in Shenzhen, China, with 100+ employees, 20+ liquid silicone injection machines, and a daily output capacity of 30,000 units. This article walks you through every zone of our facility — from raw material receiving to finished-goods dispatch — the same route we take every buyer who visits in person. By the end, you will know exactly what happens to your raw material from the moment it arrives through our dock to the moment it ships in your branded packaging.
Total floor area: 4,500 m² across dedicated production zones
Workforce: 100+ full-time employees across production, engineering, QC, and administration
LSR injection machines: 20+ units (brands include Engel, Yizumi, and equivalents)
Daily production capacity: 30,000 units across LSR and HTV lines
Certifications: ISO 9001, BSCI, SEDEX, with product-specific FDA, LFGB, EN 71 compliance
Approved supplier to Walmart (since 2019), Target (since 2019), and Disney (licensed since 2022)
Virtual factory tours available on 24-hour notice; in-person visits by appointment
The tour starts before any machine runs, at the raw material receiving dock on the east side of our facility. Two or three times per week, a truck arrives with silicone compound from our approved suppliers — Wacker, Shin-Etsu, and Dow for LSR; domestic and import HTV gum base for compression work. Every incoming shipment carries a Certificate of Analysis (CoA) from the supplier showing compound viscosity, platinum catalyst ratio (for LSR A-part), and volatile content.
Our incoming QC technician logs each lot into our material traceability system before it moves off the dock. The lot number — typically a 12-character alphanumeric string — follows that batch of compound through every production record, every mold run, and every shipment documentation package. When a buyer asks "what compound was used in my order?" we can answer in under 60 seconds.
The raw material storage room adjacent to the dock is kept at 18–22°C. LSR compound degrades in heat and light; the storage room has no direct sunlight, climate control, and a first-in-first-out rotation protocol enforced by a physical rack system. You can smell the distinct faintly mineral, almost odorless scent of fresh platinum-cure LSR when the storage room door opens — nothing like the sharper smell of peroxide HTV. Buyers who visit always comment on how clean the smell is compared to plastic injection facilities.
Turn left through the double fire doors and you enter the loudest part of our operation: the LSR injection molding floor. Twenty-plus injection presses line two rows, each machine roughly the size of a large SUV, painted in the manufacturer's colors — the muted grey of German-origin machines alongside the brighter red panels of our Chinese-built presses. The machines run continuously in two shifts. The sound is a rhythmic combination of hydraulic actuators pressurizing clamps, the brief hiss of the metering unit delivering shot, and the soft click of mold halves separating.
Each press has its own metering and mixing unit (MMU) mounted to the side — a compact cabinet where the two-part LSR (Part A, the platinum catalyst side; Part B, the crosslinker side) is drawn from drums, ratio-metered at 1:1, cooled to 5–10°C, and injected through a cold runner into the hot mold. Mold temperatures on this floor run 170–185°C. You can feel the radiant warmth standing 1.5 meters from an open press.
What you do not see is flash. LSR injection with properly maintained molds produces parts that look finished the moment the mold opens. A four-cavity nipple mold opens, a robot arm (on our automated cells) or an operator (on manual cells) removes the parts, drops them into a classification tray, and the next shot is already injecting. Cycle time: 25–35 seconds. The repetition is almost meditative.
The mold storage area along the east wall of this floor holds over 200 active mold sets in labeled rack positions. Each mold rack position corresponds to a production record showing last run date, last preventive maintenance date, shot count since last polish, and next scheduled maintenance. Our tooling team polishes mold parting surfaces every 30,000 shots — this is what keeps flash levels below the 0.3 mm threshold that Walmart's quality manual requires.
Past the LSR floor, through a partition wall that serves as a sound and contamination barrier, is the HTV compression molding area. The temperature here is higher — compression presses radiate more ambient heat than injection machines — and the character of the work is different. Operators move with deliberate rhythm, cutting preforms from sheeted compound on stainless steel work surfaces, positioning them in open mold cavities, closing the press, waiting out the cure cycle, opening the press, and removing parts.
The HTV presses are larger hydraulic machines with heated platens. Mold temperatures here run 160–180°C. You can hear the decisive thump of a hydraulic press closing on a charge — a different sound from LSR's more mechanical click — followed by the timed silence of the cure cycle, then the press releasing with a sustained hydraulic exhale.
Fresh HTV parts come out of the mold trailing thin webs of flash at every parting line. That flash is not a defect — it is physics. Operators here work with speed and consistency, snapping flash from parts in practiced motions, dropping conforming parts into trays and flash into scrap bins. Scrap silicone, by the way, is segregated by color and compound type, consolidated, and sent back to our compound supplier or to a certified silicone recycler. We run under zero-landfill policy for silicone scrap.
For parts requiring cryogenic deflashing — thin-walled promotional items, complex geometries with flash in hard-to-reach internal surfaces — the process moves to a small cryogenic tumbler room off the main HTV floor. Parts are loaded into a rotating drum with cryogenic media, liquid nitrogen drops the temperature to -60°C, and flash becomes brittle and fractures away from the part surface. Results are highly consistent; surface finish is excellent. Add 4–8 hours of process time.
Between production and the QC lab sits the largest zone by floor area: secondary processing. This is where raw-from-mold silicone parts become finished branded products.
Assembly stations. Multi-component products — a water bottle with silicone sleeve, cap, and straw; a baby feeding set with spoon, bowl, and bib — are assembled here at workbench stations with jigged fixtures. Assembly operators work to a printed work instruction that specifies component orientation, assembly torque (for threaded components), and a finished-goods checklist.
Printing cells. Silicone printing requires surface activation before ink application — either corona treatment or a thin-film primer coating. Our pad printing cells handle two-color registration with ±0.3 mm accuracy. Silk-screen printing cells handle flat and slightly curved surfaces. After printing, parts cure under UV lamps or in a conveyor oven, depending on the ink system. Print adhesion is validated on every order by cross-hatch tape test (ASTM D3359) and a rub test.
Overmolding station. Some products require bonding silicone over a hard plastic substrate. This happens in a dedicated press cell where the substrate is primed with adhesion promoter, placed in the overmold tool, and LSR is injected around it. The adhesion bond is verified by peel testing — typically requiring above 5 N/mm pull strength.
Post-cure ovens. HTV products with peroxide-cure compound go through post-cure here: 200°C for 4 hours in large forced-air ovens. The oven area has dedicated exhaust ventilation; you can detect a faint acetic note when the oven doors open during a peroxide-cure cycle. Platinum-cure products — LSR and platinum HTV — go through a shorter 180°C stabilization cycle.
The QC lab sits mid-facility, accessible from both the production floor and the administrative wing. It is deliberately positioned centrally so that inline samples can reach the lab without being carried across the entire facility.
Walk in and the first thing you notice is the silence relative to the production floor, and the calibration stickers on everything. Every piece of measurement equipment — shore durometer, Brookfield viscometer, tensile tester, colorimeter, coordinate measuring machine, digital calipers — has a calibration label showing last calibration date and next due date. Calibration is done annually by an accredited metrology service; in-house verification checks happen monthly.
Inline QC: Every production shift runs 100% visual inspection at the press and a sampling AQL inspection. For baby products, we use AQL 0.65 (tightened inspection) per ANSI/ASQ Z1.4. For promotional items, AQL 2.5 (normal inspection). Rejected parts are tagged, quarantined, and disposition-decided within 24 hours — rework, re-process, or scrap.
Shore A testing: Every compound lot gets a durometer check against the spec sheet at the start of production. A 5-point average on a freshly cured type-A test disc. Acceptable range is ±3 Shore A units from the nominal specification.
Color measurement: Our colorimeter compares the in-production part to the reference plaque retained from the first approved production run. We accept Delta E up to 1.0 for standard colors, up to 2.0 for metallics. Results are logged in the batch record.
Migration testing: Not done in-house — we do not have the chromatography equipment. Migration tests under FDA 21 CFR 177.2600 (U.S. Food and Drug Administration) and LFGB §30/31 (Germany's food law) are commissioned at SGS, Intertek, or Bureau Veritas in Shenzhen or Guangzhou. Turnaround is typically 5–10 working days. We maintain a rolling program of re-testing whenever a compound lot changes, a supplier changes, or a new color is introduced.
Exit the QC lab, turn right, and the finished goods zone begins with the packaging stations. Packaging operations range from simple poly-bag and carton packing for bulk B2B orders to full retail-ready assembly: blister cards, hang-tag attachment, anti-static bags, inner box labeling, FNSKU labeling for Amazon FBA, master carton labeling with GS1 barcodes.
The packaging area smells faintly of cardboard and the mild adhesive from label applicators — a comfortable, familiar smell after the industrial zones. Operators work at standing-height conveyor lines, applying labels, collating components, sealing poly bags, and pack-counting into master cartons. A check-weigh scale at the end of each line catches cartons that are over or underweight — automatic reject for re-inspection.
The finished goods warehouse runs on a WMS (Warehouse Management System) linked to our ERP. Pallets are barcoded and scanned into locations. Pick lists for outbound orders are system-generated, with operator scanning confirmation at each pick. We maintain real-time inventory visibility — useful for buyers managing replenishment cycles, as we can confirm on-hand stock quantities instantly.
Finished goods exit through the west dock for container loading. Our most common export containers are 20-foot dry vans; we also ship LCL (less-than-container load) via our Shenzhen freight forwarder partners. Export documentation — commercial invoice, packing list, certificate of origin, and product-specific compliance documents — is prepared by our shipping team and reviewed against the buyer's letter-of-credit terms or payment conditions.
Three things consistently surprise buyers who visit in person or conduct our live video tour:
The engineering floor. We have a 12-person engineering and tooling team on-site. They run SolidWorks for mold design, operate our CNC and EDM tooling machines, and handle mold maintenance. When you see your mold being designed, cut, and maintained on the same floor where it will run production — not shipped out to a subcontractor toolmaker — you understand why our DFM response time is 48 hours and our mold quality consistency is what it is.
The test equipment inventory. Buyers expecting a "Chinese factory" to have a caliper and a scale are surprised to find a Minolta colorimeter, a Zwick tensile tester, a calibrated shore A durometer set, and a CMM (coordinate measuring machine) in the QC lab. This equipment is not decorative. Every lot generates data.
The people. Our 100+ employees include production operators who have been with us for 12+ years. That tenure matters in a factory: operators who have run 50,000 shots on a particular mold type know its failure modes and catch deviations before they become defects. Retention is driven by above-average base wages, on-site meals, and a housing subsidy program.
We schedule live video factory tours on 24-hour notice and in-person visits by appointment. During Canton Fair (April and October in Guangzhou), we also host delegations from buyers visiting southern China. Our YouTube channel at youtube.com/@mitoursiliconeproduct features production process and product videos for buyers who want a preview before scheduling a live session.
Email: yfsalee@mymitour.com
Phone: +86 199 2529 4106
Our production facility covers 4,500 m² and houses dedicated zones for LSR injection, HTV compression, secondary processing (printing, assembly, post-cure), a QC lab, and a finished goods warehouse. The facility runs two production shifts per day with 100+ full-time employees.
Yes. We welcome in-person visits by appointment. For buyers attending Canton Fair in Guangzhou (April and October), we can arrange factory visits before or after the fair. Email yfsalee@mymitour.com to schedule.
We operate 20+ liquid silicone injection machines for LSR work and multiple HTV compression presses for solid silicone compound processing. Total daily capacity across both lines is 30,000 units.
Yes. Our ISO 9001 certificate, BSCI audit report, and SEDEX registration are verifiable through their respective issuing bodies. Product-specific compliance documents (FDA 21 CFR 177.2600, LFGB §30/31, EN 71) reference specific lot numbers and can be matched against lab portal records at SGS, Intertek, and Bureau Veritas.
We do not subcontract production for orders where we have accepted quality responsibility. All manufacturing, QC, and packaging occurs within our 4,500 m² Shenzhen facility. For large surge orders that might exceed our committed capacity, we discuss options with buyers transparently before accepting.
March–April and September–October, bracketing the Canton Fair periods. Avoid Chinese New Year (January–February) when the factory operates on a reduced schedule. We can arrange visits year-round outside the major holiday periods.
Peter Cui | 21 years of silicone manufacturing experience | 4,500 m² Shenzhen facility | Walmart-, Target-, and Disney-approved supplier | Contact: yfsalee@mymitour.com
