Air fryer moulding

In addition, our company has established cooperative relationships with plastic raw material suppliers, printing manufacturers, etc. to ensure the supply of raw materials and printing quality. Through our rich experience and perfect supply chain, our company can provide customers with high-quality customized Air fryer moulding moulding products to meet their specific needs. At the same time, we have 10 years of professional foreign trade service experience, understand the foreign trade process, and better serve our customers. For Air fryer moulding moulding products, we can make corresponding plastic parts, which is mainly done through injection molds.

The plastic housing of an air fryer constitutes a typical structural component for home appliances, characterized by its operation in close proximity to a heat source and its exposure to high-temperature radiation and alternating thermal cycles. Key components include the upper housing, lower base, hot air chamber cover, control panel, handle, oil drip tray bracket, temperature control bracket, and air outlet grille. With internal operating temperatures potentially exceeding 200°C, the housing is subjected to prolonged high-temperature radiation and hot air impingement. Consequently, it must satisfy stringent requirements regarding flame retardancy, heat resistance (without deformation), dimensional stability, high-gloss aesthetics, and non-toxic safety—making its injection molding process significantly more challenging than that of standard home appliance housings. The critical molding considerations revolve around high-temperature resistance, resistance to thermal deformation, flame-retardant safety, low internal stress, and dimensional stability, as detailed below.

Material selection prioritizes high-temperature resistance, aging resistance, high rigidity, and flame retardancy. Exposed components—such as the main housing body, upper cover, and handle—typically utilize heat-resistant ABS, heat-resistant modified PP, or glass-fiber-reinforced PP. These materials require a heat resistance rating of 110–135°C to prevent softening, warping, or yellowing under prolonged thermal exposure. Heat-resistant ABS offers high surface gloss, excellent rigidity, and ease of color matching, making it ideal for the aesthetic components of high-end models; conversely, PP is favored for bases, brackets, and covers due to its lower cost, superior toughness, and balanced thermal properties. Load-bearing precision components—such as control panels, viewing window frames, and motor brackets—often employ PC/ABS blends or reinforced PA66. PC/ABS offers superior heat resistance and creep resistance, resulting in enhanced dimensional stability; PA66 provides high strength and fatigue resistance, making it suitable for structural applications subjected to sustained mechanical stress. For components situated in high-temperature zones—such as those near the hot air chamber or air outlet—priority is given to heat-resistant PP or glass-fiber-reinforced materials to prevent thermal deformation that could lead to loose assemblies or widened gaps. As the air fryer is an electrically heated appliance, all plastic components must meet the UL94 V-0 flame retardancy standard to mitigate fire hazards associated with high temperatures. Furthermore, components exposed to the hot air circulating within the internal cavity must exhibit low odor and minimal volatile organic compound (VOC) emission characteristics to prevent the generation of unpleasant odors during operation. Regarding raw material pretreatment: ABS, PC/ABS, and PA66 exhibit strong hygroscopicity; therefore, they require drying at 80–90°C for 3–4 hours to reduce moisture content to below 0.03%, thereby preventing the formation of silver streaks, bubbles, or flow marks during molding. PP, conversely, has low hygroscopicity and does not require extensive drying; in humid environments, a simple preheating at 70°C for one hour is sufficient.

Mold design focuses primarily on addressing issues related to thermal deformation, warping of large flat surfaces, and the filling and demolding of deep cavities. Air fryer housings typically feature deep cavities, large flat surfaces, numerous reinforcing ribs, and multiple assembly snap-fits. The parting line is positioned along the maximum contour—strategically avoiding the aesthetic surfaces—and the mold shut-off clearance is maintained within 0.02 mm to minimize flash and burrs. The mold cavity and core are constructed from pre-hardened steel grades (such as 718 or S136) and polished to a surface roughness of Ra 0.02–0.05 μm; this ensures the housing possesses a uniform gloss, is free of weld lines, and is easy to clean. For housings with large flat surfaces, reinforcing ribs must be strategically arranged with a thickness equal to 50–60% of the main wall thickness to prevent sink marks and warping caused by heat exposure. Assembly holes, locating posts, and snap-fit features require precision machining, with dimensional tolerances controlled within ±0.05–0.1 mm to ensure a secure and stable assembly. The mold dimensions must be compensated based on the material's shrinkage rate—typically 0.5–0.7% for ABS and 1.2–1.8% for PP—to prevent excessive gaps from developing after prolonged use at high temperatures.

For the gating system, priority is given to hot runners or multi-point gating via pin-point gates. For larger housings, a balanced dual- or triple-point gating configuration is employed to shorten the flow path and minimize weld lines and internal stresses. The gate type is typically a submarine gate or side gate, positioned discreetly to avoid compromising the product's aesthetic appearance. The cooling system is of critical importance; water channels are distributed uniformly throughout the mold cavity, with increased density in deep-cavity and thick-walled areas. Mold temperature fluctuations are strictly controlled within ±3°C to ensure uniform cooling, thereby reducing internal stresses and preventing warping. Ventilation design requires particular emphasis; vent slots measuring 0.02–0.03 mm should be incorporated at the ends of deep cavities, the bases of ribs, and at corners to prevent trapped air burn marks, short shots, and voids. For undercut features—such as handles and air outlet grilles—sliders or angled ejectors should be utilized for core pulling to ensure smooth demolding, avoiding drag marks or stress whitening.

The injection molding process targets heat stability, resistance to deformation, low internal stress, and a high-gloss surface finish. Equipment selection involves injection molding machines ranging from 160 to 500 tons, with an injection volume set at 1.2 to 1.5 times the product weight to ensure thorough plasticization and stable injection. Temperature settings are segmented: for heat-resistant ABS, the barrel temperature is set to 230–265°C and the mold temperature to 60–80°C to enhance surface quality and reduce internal stress; for PP, the barrel is at 190–225°C and the mold at 40–65°C to balance crystallization shrinkage and minimize thermal deformation; and for PC/ABS, the barrel is at 240–275°C and the mold at 70–90°C to improve dimensional stability. Injection speed is controlled in stages: an initial low speed prevents jetting; a medium-speed phase fills the main body; and a final low-speed phase applies steady pressure to prevent trapped air and flash.

Injection pressure is set between 85 and 140 MPa, depending on wall thickness and structural complexity, with appropriate increases for deep cavities and thin-walled parts. Holding pressure is set at 60%–80% of the injection pressure, with a holding time of 12–25 seconds, specifically to compensate for shrinkage in thick-walled sections and assembly features, thereby eliminating sink marks and depressions. Back pressure is maintained at 3–8 MPa to improve melt homogeneity and prevent color variations or streaking. Cooling time is controlled between 25 and 45 seconds, depending on wall thickness, to ensure the product is fully solidified before ejection, thereby preventing deformation or sticking to the mold. Ejection utilizes a combined ejector plate and pin system to ensure uniform force distribution, preventing stress whitening or pin marks on large flat surfaces.

Post-processing and quality inspection procedures are strictly conducted in accordance with safety standards for electric home appliances. Following the molding process, gates, flash, and burrs are meticulously removed. Cosmetic parts undergo inspection for gloss, color deviation, scratches, and weld lines; structural parts are checked for dimensions, snap-fit strength, and mounting hole spacing. Key reliability tests include: high-temperature resistance testing (withstanding exposure to 110–130°C environments for 2–4 hours without softening, deformation, or yellowing); flame retardancy testing (meeting the V-0 rating, self-extinguishing immediately upon removal from flame); and heat aging resistance testing (withstanding long-term thermal cycling without cracking or discoloration). Components situated near the internal cavity must undergo odor testing to ensure the absence of unpleasant smells or toxic off-gassing.

Regarding the prevention and control of common defects: Shell warping and deformation are often caused by uneven cooling, improper mold temperatures, or excessive internal stress; remedies involve optimizing cooling channel layouts, extending cooling times, and adjusting holding pressure. Sink marks and depressions result from overly thick ribs or insufficient holding pressure; solutions require structural optimization and an increase in holding pressure. Scorching and gas marks stem from poor venting; this necessitates cleaning vent channels and reducing injection speeds during the final filling stage. Silver streaks and surface haziness are caused by moisture in the raw material; strict drying protocols must be enforced. Flash and burrs result from insufficient clamping force or mold wear; solutions involve increasing clamping force and repairing the mold parting lines. Finally, yellowing and cracking under high-temperature conditions require switching to a higher heat-resistant grade of material and minimizing internal stress during the molding process.

Overall, the core priorities for the injection molding of plastic air fryer housings are high-temperature deformation resistance, flame retardancy and safety, low internal stress, dimensional stability, and a high-gloss aesthetic finish. Through meticulous control across the entire process—encompassing materials, mold design, processing parameters, and quality inspection—the housing can maintain its dimensional stability, remain free of cracks and yellowing, and resist deformation even under prolonged exposure to high-temperature radiation and alternating hot/cold environments, thereby fully satisfying the safety, durability, and aesthetic requirements of air fryers.

We are a Air fryer moulding moulding manufacturer, providing high-quality Air fryer moulding moulding manufacturing. As long as you want to customize/develop Air fryer moulding moulding products, you can find us. We have professional injection mold design and mature manufacturing technology, providing you with one-stop service, from product design-mold making-product production-product packaging-product transportation, we can help you in every link. As long as you come to us, we will provide you with the ultimate service and satisfy you in terms of product quality, production time, information dialogue, etc.

Plastic Injection Mould making

Plastic molding specifications

Mold design:

Transaction process:

Mold testing:

Product packaging

Factory

We are Custom Plastic Mold factory. Our factory is plastic injection mold maker. we has 17 years of experience in professional custom plastic mold and 10 years of foreign trade experience. We are custom Plastic Mold supplier. We can provide custom Plastic Mold service. Our factory can make the Injection molded plastic parts, and the quality of the products will satisfy you.

We have more than 50 high-end machines and hundreds of engineers and designers. We can provide one-stop service, from product design - mold making - product production - product packaging - transportation. We have a complete production chain. We can meet all your requirements.

Services we provide:

Professional custom mold service, Plastic mold design and manufacturing .plastic product production, product design, mold design, blow mold customization, rotational mold customization, die-casting mold customization. 3D printing services, CNC manufacturing services, product packaging, customized packaging, shipping services.

We always adhere to the principles of quality first and time first. While providing customers with the highest quality products, try to maximize the production efficiency and shorten production time. We are proud to tell every customer that our company has not lost any customer since its establishment.If there is a problem with the product, we will seek a solution actively and take responsibility to the end.

FAQ

Q1: Are you trading company or manufacturer ?

A: We are manufacturers.

Q2. When can I get the quotation?

A: We usually quote within 2 days after we get your inquiry.

If you are very urgent, please call us or tell us in your email so that we can quote for you first.

Q3. How long is the lead-time for mold?

A: It all depends on the products' size and complexity. Normally, the lead time is 25 days.

Q4. I have no 3D drawing, how should I start the new project?

A: You can supply us a molding sample, we will help you finish the 3D drawing design.

Q5. Before shipment, how to make sure the products quality?

A: If you don't come to our factory and also don't have the third party for inspection, we will be as your inspection worker.

We will supply you a video for production process detail include process report, products size structure and surface detail, packing detail and so on.

Q6. What is your payment terms?

A: Mold Payment: 40% deposit by T/T in advance, 30% second mold payment before sending out the first trial samples, 30% mold balance after you agree the final samples.

B:Production Payment: 50% deposit in advance, 50% before sending out the final goods.

Q7: How do you make our business long-term and good relationship?

A:1. We keep good quality and competitive price to ensure our customers benefit for best quality products.

2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.