Frying machine moulding

Through our rich experience and perfect supply chain, our company can provide customers with high-quality customized frying machine 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 frying machine moulding products, we can make corresponding plastic parts, which is mainly done through injection molds.

The plastic components of deep fryers primarily include exterior panels, control panels, handles, knobs, oil cup lids, drip tray brackets, motor covers, switch bases, and internal supports. These components operate in a unique environment characterized by prolonged proximity to high-temperature heat sources, exposure to corrosive oil mist, and frequent cycles of rapid heating and cooling. Furthermore, certain parts require direct contact with cooking oils and must meet food-grade safety standards. Consequently, the requirements for heat resistance, oil resistance, dimensional stability, flame retardancy, and food-contact safety for these components are significantly more stringent than those for standard household appliance plastics. The injection molding process for these parts must be centered around five core control principles: high-temperature resistance, deformation resistance, oil resistance, dimensional stability, and safety and environmental compliance. The specific key considerations are outlined below.

Material selection must prioritize compliance with requirements for heat resistance, oil resistance, food-grade safety, and flame retardancy. For aesthetic and load-bearing components—such as exterior housings, panels, and handles—commonly used materials include heat-resistant ABS, high-impact PP, and glass-fiber-reinforced PP. These materials must possess a heat resistance rating of 90–120°C to prevent softening or deformation when situated near heating elements. Heat-resistant ABS offers excellent rigidity, high surface gloss, and resistance to oil mist corrosion, making it ideal for the housings of high-end models. PP, with its low density, superior resistance to oils and greases, and moderate cost, is the predominant material choice for handles, bases, and protective covers; the addition of anti-aging masterbatches can further extend its thermal service life. For precision structural components—such as control panels, switch bases, and motor brackets—materials such as PC/ABS blends or reinforced PA66 are selected. PC/ABS offers excellent heat resistance and creep resistance, making it suitable for parts subjected to sustained mechanical stress, while PA66 provides high strength and thermal stability, rendering it ideal for mounting brackets and transmission mechanisms. If a component comes into direct contact with cooking oil or food products, it must be manufactured using food-grade PP or food-grade ABS to ensure compliance with food-contact material standards and to guarantee the absence of heavy metals or harmful volatile organic compounds. Finally, as deep fryers are classified as electric heating appliances, the majority of their structural components are required to meet the UL94 V-0 flame retardancy standard to mitigate the risk of fire hazards associated with high-temperature operation. Regarding raw material pretreatment, ABS, PC/ABS, and PA66 exhibit strong hygroscopicity; they must be dried at 80–90°C for 3–4 hours—keeping moisture content below 0.03%—to prevent the formation of silver streaks and bubbles during high-temperature molding. PP, having low hygroscopicity, generally requires no drying; however, in humid environments, it should undergo low-temperature preheating to prevent surface water marks and poor bonding.

Mold design focuses primarily on addressing issues related to high-temperature shrinkage, deep-cavity molding, heat dissipation and venting, and structural integrity. Fryer plastic components typically feature deep cavities, large flat surfaces, and reinforcing ribs; consequently, the mold parting line must be positioned away from aesthetic surfaces and assembly sealing areas. The mold clamping clearance should be controlled within 0.02 mm to minimize flash and burrs. The mold cavities and cores should be constructed from wear-resistant, pre-hardened steels—such as 718 or S136—and polished to a surface roughness of Ra 0.05 μm to ensure a smooth finish that is resistant to oil stains and easy to clean. For large flat panels, reinforcing ribs must be strategically arranged with a thickness equal to 50%–60% of the main wall thickness to prevent warping and deformation during high-temperature operation. Assembly holes, snap-fits, and positioning posts should utilize insert pin structures, with dimensional tolerances controlled within ±0.05–0.1 mm to ensure secure and stable assembly.

The gating system typically employs hot runners or large-gate side injection points; large-sized housings often utilize multi-point gating to ensure rapid and uniform melt filling, thereby minimizing weld lines associated with long flow paths. The cooling system is particularly critical; circulating water channels must be distributed uniformly throughout the mold cavity, with increased density in areas featuring large flat surfaces or thick walls, to prevent localized overheating that could lead to uneven shrinkage. During the molding of fryer components, air is prone to becoming trapped within deep cavities, rib structures, and corners. Furthermore, given that the material is susceptible to decomposition at high temperatures, venting slots—measuring 0.02–0.03 mm—must be incorporated at the flow fronts to prevent short shots, scorching, and air streaks. For undercuts and snap-fit features on handles and housing shells, sliding cores or angled ejectors should be utilized to ensure smooth demolding without causing drag marks or stress whitening.

Injection molding process parameters are centered on achieving high-temperature stability, low internal stress, and resistance to deformation. Equipment selection involves 120–500 ton injection molding machines, with injection volume matched to the size of the plastic part. Temperature settings utilize a gradient profile: for PP, the barrel temperature is set to 190–220°C and the mold temperature to 40–60°C to control crystallization shrinkage and minimize deformation; for heat-resistant ABS, the barrel is at 230–260°C and the mold at 60–75°C to enhance surface gloss and heat resistance; and for PC/ABS, the barrel is at 240–270°C and the mold at 70–85°C to reduce internal stress. Injection speed is controlled in stages: an initial low-speed phase prevents jetting; a mid-phase high-speed phase facilitates filling; and a final low-speed phase maintains stable pressure to prevent air entrapment and scorching.

Injection pressure is set between 80–140 MPa, depending on wall thickness and part structure; pressure is increased appropriately for thick-walled and deep-cavity parts. Holding pressure is set to 60%–80% of the injection pressure, with a holding time of 10–25 seconds, focusing on compensating for shrinkage in thick-walled sections and assembly features to eliminate sink marks and depressions. Back pressure is maintained at 3–8 MPa to ensure uniform melt plasticization. Cooling time is set between 20–40 seconds based on wall thickness, ensuring the product is fully solidified and remains free of deformation or mold adhesion during ejection. Ejection utilizes a combination of ejector plates and pins to ensure uniform force distribution, thereby preventing "whitening" (stress marks) and cracking.

Post-processing and quality inspection are conducted in strict compliance with home appliance safety standards. After molding, gates, flash, and burrs are removed; cosmetic parts are inspected for color deviation, scratches, and weld lines; while structural parts are checked for dimensional accuracy, snap-fit strength, and the precision of mounting hole positions. Heat-resistant parts undergo high-temperature testing, requiring them to remain free of softening, deformation, or cracking after being exposed to an environment of 90–110°C for 2–4 hours. Flame-retardant parts undergo standard flammability testing to ensure they self-extinguish immediately upon removal from a flame source. Food-contact grade components undergo odor and migration testing to ensure the absence of offensive odors or the release of toxic substances. Regarding the prevention and control of common defects: High-temperature warping is primarily caused by uneven cooling or improper mold temperatures; this requires optimizing the cooling channels and extending the cooling time. Sink marks and depressions result from insufficient holding pressure or excessively thick ribs; the holding pressure should be increased, and the structural design optimized. Scorching and gas marks stem from poor venting; the vent channels must be cleaned, and the injection speed reduced during the final stage. Silver streaks and bubbles are caused by moisture in the raw material; strict drying procedures are therefore mandatory. Finally, flash is caused by insufficient clamping force or mold wear; the clamping force must be increased, and the mold's parting line repaired.

We are a frying machine moulding manufacturer, providing high-quality frying machine moulding manufacturing. As long as you want to customize/develop frying machine 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

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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.