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Vacuum Formed Ceramic Fiber Shaped Parts

-- Steady & Reliable Manufacturer --

Introduction

Vacuum-formed ceramic fiber shaped parts cover the broad family of rigid insulation components produced by drawing a fiber-water slurry onto a shaped mold under vacuum, then drying the resulting preform in an oven. The process allows virtually any geometry to be produced — cylinders, cones, L-sections, pipe elbows, crucibles, setter tiles, burner blocks, and proprietary furnace components — without the waste and lead time associated with machining dense refractories from billet.

The vacuum-forming process gives these parts a distinct structural advantage over cut blanket or board: fibers are deposited three-dimensionally around the mold contours, producing a component with uniform wall thickness and a smooth outer surface on all faces. This makes vacuum-formed parts the preferred choice for OEM furnace builders who need precise, repeatable components installed in production runs of dozens to hundreds of furnace units.

Nengcheng's wet-vacuum forming line handles components from small (50 mm diameter) crucibles to large (500 mm × 500 mm × 200 mm) setter boards, with mold tooling either built in-house or manufactured from customer-supplied drawings.

Specification

ParameterValue
Base Fiber Grade1260 °C / 1350 °C / 1430 °C / 1600 °C (PMF / Alumina)
Forming ProcessWet vacuum suction forming
Density Range200–450 kg/m³ (depending on mold and grade)
Wall Thickness Range5 mm – 80 mm
Maximum Part Envelope≈ 500 × 500 × 200 mm (larger on enquiry)
Dimensional Tolerance± 1.5 mm on linear dimensions, ± 0.5° on angles
Thermal Conductivity @ 600 °C0.11 – 0.19 W/(m·K)
Surface FinishSmooth (mold face) / textured (mandrel-release face)
MOQ for Custom Shapes50 pcs (standard); lower MOQ possible for large parts
Tooling Lead Time3–5 weeks for new mold; repeat orders from stock in 2–3 weeks

Application

  • Furnace pipe sleeves & thermocouple protection tubes: cylinder-form parts protect thermocouples and atmosphere tubes passing through furnace walls
  • Crucibles & setter tiles: vacuum-formed crucibles for laboratory furnaces used in sintering, calcination, and fusion work
  • Burner tiles & quarls: shaped blocks forming the combustion chamber in gas-fired furnaces, requiring tight dimensional control for correct flame geometry
  • Kiln furniture: setter plates, saggers, and posts that hold ceramic ware during firing, where lightweight thermal mass reduces energy consumption
  • Expansion joint seals: custom-profile parts filling complex expansion gaps in industrial furnace assemblies
  • OEM furnace components: proprietary door seals, muffle liners, element retainer rings, and heating element supports for furnace OEMs

Advantage

  • Complex geometries at low cost: vacuum-forming produces near-net-shape parts, eliminating the heavy machining allowance needed when starting from billet
  • Consistent wall thickness: vacuum draws slurry uniformly around the mold, avoiding the thin spots and density variations common in hand-formed parts
  • Three-dimensional fiber orientation: fibers deposit perpendicular to the mold surface as well as parallel to it, giving the part higher through-wall strength than cut-board equivalents
  • Smooth all-round surface: excellent dimensional accuracy on all faces without post-machining for most applications
  • Short lead time for repeat orders: once tooling is made, repeat production runs from stock slurry in 2–3 weeks
  • Wide temperature range: same forming technology used from 1260 °C standard grades up to 1600 °C PMF grades

Core Features

  • In-house mold tooling design and manufacture — no third-party tooling lead time
  • Fiber slurry batch control for consistent density and chemistry across production runs
  • Drying ovens with controlled ramp rates to prevent green-part cracking
  • Post-forming machining capability (CNC routing) for features tighter than ± 1.5 mm
  • Optional rigidizer impregnation for enhanced surface hardness and erosion resistance
  • Dimensional inspection report available for OEM qualification programs
  • Can you produce shaped parts to my CAD drawings?
  • Yes. Nengcheng's technical team accepts 2D DXF, STEP, or PDF drawings for mold design. We prepare a mold design for customer approval before manufacture. Once the mold is approved, a first-article inspection report is issued before production quantities are released.
  • What is the minimum wall thickness achievable by vacuum forming?
  • The practical minimum wall thickness for vacuum-formed parts is about 5 mm for simple geometries. Very thin sections on complex shapes may require local reinforcement in the mold design. For walls below 5 mm, we typically recommend a cut-board approach or a combination part.
  • Are vacuum-formed parts structurally stronger than cut ceramic fiber board?
  • In terms of modulus of rupture, vacuum-formed parts and cut board from the same fiber grade have similar values. However, vacuum-formed parts have a more isotropic strength distribution because fibers are deposited three-dimensionally, while cut board has a preferential fiber orientation parallel to the board face and is weaker across its thickness.
  • Can shaped parts be supplied with a rigidized surface?
  • Yes. Parts can be impregnated with colloidal alumina or silica rigidizer before delivery, which increases surface hardness and resistance to erosion from high-velocity gas flow. Rigidizing reduces surface porosity slightly but does not significantly change thermal conductivity.
  • What is the tooling charge for a new custom shape?
  • Tooling charges depend on part complexity and mold size. Simple cylindrical or prismatic shapes typically cost less. Complex profiles with undercuts may require multiple mold pieces and proportionally higher tooling investment. Contact us with your drawing for a no-obligation quote including tooling amortization options.
Zhejiang Nengcheng Crystal Fiber Co., Ltd.
Zhejiang Nengcheng Crystal Fiber Co., Ltd.
Zhejiang Nengcheng Crystal Fiber Co., Ltd. was established in 2015. It is a professional enterprise that develops and produces ultra lightweight energy-saving high-temperature materials, and sells experimental electric furnaces, industrial electric furnaces, and non-standard customized electric furnaces. China Vacuum Formed Ceramic Fiber Shaped Parts Manufacturers. The company adheres to the principle of "survival through quality, development through reputation" and upholds the business philosophy of "practicality, integrity, and efficiency". We are committed to providing comprehensive and high-quality equipment solutions for customers in industries such as ceramics, metallurgy, electronics, glass, and chemical engineering. We also provide services such as powder roasting, ceramic sintering, and high-temperature experiments to universities, research institutes, and industrial and mining enterprises. wholesale Vacuum Formed Ceramic Fiber Shaped Parts Suppliers. At the same time, we are also striving to promote the strategic development of Nengcheng's lightweight, energy-saving, and environmentally friendly high-temperature alumina fiber in the field of new furnaces, and strive to become an internationally leading advanced high-temperature equipment industry service provider.

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