MF Material Injection Molding Parts

Item:MF,UF,MF material injection molding parts

Specific gravity: 1.5 g/cm3

Molding shrinkage: 0.6-1.0%

Molding temperature: 160-1800

Material properties Good arc resistance and electrical insulation, good water resistance and heat resistance, suitable for compression molding.

Forming properties:

1. Good fluidity and fast hardening speed, so the preheating and molding temperature should be appropriate, and the coating, mold clamping and pressing speed should be fast

2. Large molding shrinkage

3. There are many moisture volatiles, which are easy to absorb moisture and agglomerate. It should be preheated and dried during molding to prevent re-absorbing moisture, but if it is too dry, the fluidity will decrease. There is moisture and decomposition products during molding, and it is acidic. The mold should be chrome-plated to prevent corrosion, and it should be exhausted during molding.

4. The molding temperature has a great influence on the quality of plastic parts. If the temperature is too high, decomposition, discoloration, and uneven color of air bubbles may occur. When the temperature is too low, the fluidity is poor and dull.

5. The material is thin, the specific volume is large, and there is a lot of air in the material. When forming large plastic parts with pre-pressed ingots, it is easy to produce ripples and flow lines, so it is generally not suitable to use.

The main products of Zhongwei Precision Machinery Co., Ltd. are nylon products, plastic products, ABS series, rubber products, etc. Types of injection molding materials that can be processed: polyethylene (PE), polypropylene (PP), nylon (PA, PA6, PA66), polyoxymethylene (POM), ABS, polyurethane (TPU), polyphenylene sulfide (PPS), polystyrene Carbonate (PC), Polyetheretherketone (PEEK), etc.

Product Description

1. Implementation standards: the company strictly implements ISO9001, ISO14001, IATF16949, VDA6.3 certification,

The products have passed the certification of ROHS, FDA EU, etc.

2. Product material standards: ISO, GB, ASTM, SAE, EN, DIN, BS, AMS, JIS, ASME, DMS, TOCT, GB

3. Main processes: plastic injection molding, metal insert injection molding, investment casting, die-casting aluminum,

4. Available materials for injection molding:

Processable nylon products, plastic products, ABS series; injection molding material types: polyethylene (PE), polypropylene (PP), nylon (PA, PA6, PA66), polyoxymethylene (POM), ABS, polyurethane (TPU), poly Phenyl sulfide (PPS), polycarbonate (PC), polyether ether ketone (PEEK) and 3D printing can be customized according to customer requirements.

Production Process

Melamine (melamine, Melamine, referred to as MF, chemical formula: C3H6N6) plastic tableware is a high molecular polymer, and its monomers are formaldehyde and melamine. 37% aqueous formaldehyde solution was used in the reaction, and the molar ratio of formaldehyde and melamine was 2~3. The research shows that: as the amount of formaldehyde increases, the amount of formaldehyde combined also increases, and the reaction is easy to carry out; changing the amount of formaldehyde, melamine resins obtained from different methylol melamines can be obtained; when the pH of the reaction system is 8.5, the side reaction The reaction is easy to control; the temperature is high, the reaction speed is fast, and the formaldehyde binding amount is not affected much in the range of 54~80℃. The first step of the reaction is to generate different numbers of N-methylol substituents, which are then further condensed into linear resins. Generally speaking, the molecular weight of the product is different depending on the reaction conditions, ranging from water-soluble to insoluble in water, and even insoluble and infusible solids can be formed. Melamine resin does not cure at room temperature, and generally needs to be thermally cured at 130~150℃. Studies have shown that adding a small amount of acid as a catalyst during curing can improve the curing rate. The cured melamine formaldehyde resin is colorless and transparent, stable in boiling water, and can even be used at a high temperature of 150 °C, with self-extinguishing, arc resistance and good mechanical properties.

(1) Preheating procedure: Use the raw material box to weigh the tableware according to the gram weight to be produced, and put it into the high-frequency wave to evenly preheat, so that the powdered raw material blocks.

(2) Plain noodle program: Pour the preheated agglomerated raw materials into the mold, start the mechanical plain noodle program, and cure and form through high temperature and high pressure.

(3) Applique procedure: Cut the decal paper that has been brushed with glossy powder according to the shape of the flower, and paste it on the plain-shaped tableware as required. Start the mechanical printing program.

(4) Gold adding procedure: After MF material injection molding parts are applied with flowers, evenly sprinkle gloss powder on the surface of the product. The gloss powder should not be sprinkled too little, otherwise it will affect the color of the product. Of course, it should not be sprinkled too much. Then start the machine, after the mechanical high temperature and high pressure, curing, the product surface has a porcelain-like luster.

(5) Polishing procedure: After the product is produced, it must be ground and polished, because the produced product has burrs, which is not conducive to the use of people's lives, and it is easy to cause damage to people's hands and mouths; therefore, grinding and polishing are essential. By grinding and polishing, the burrs of the product can be removed, so that the product looks more beautiful and the edge is smoother.

(6) Inspection and packaging procedures: After the product has passed the grinding and polishing operations, it enters the inspection link. In order to ensure product quality and strictly control the quality inspection, there should be initial inspection and re-inspection, and unqualified products should be picked out and then put into the inspection process. Library packaging.

Tableware Knowledge

Melamine plastic tableware, also known as imitation porcelain tableware, is widely used in fast food for its lightness, beauty, low temperature resistance (can be directly put into the refrigerator), cooking resistance (can be steamed and boiled in boiling water), pollution resistance, and not easy to break. It is deeply loved by consumers and children.

1\How to choose tableware?

Due to the high price of melamine powder, some unscrupulous merchants directly use urea-formaldehyde molding powder as raw material in pursuit of profit; Coat the outer surface with a layer of melamine powder. Tableware made of urea-formaldehyde is harmful to the human body. When consumers buy, they should first go to regular stores and supermarkets to buy them. Don’t be greedy and buy from street stalls; Whether it is uneven, whether the decal pattern is clear, whether there are wrinkles and air bubbles, whether the colored tableware is wiped back and forth with a white napkin for fading, etc.

2.How to use utensils correctly?

Due to the special molecular structure of melamine plastic, melamine tableware is not suitable for use in microwave ovens, and cracking will occur if used. When cleaning melamine plastic tableware, use a softer rag. Never use rags such as scouring pads and decontamination powder to clean the surface of the tableware, because scouring pads and decontamination powder will wipe the surface of hairy tableware. , making it more susceptible to contamination.

Post Injection Molding Process

1. Processing equipment: CNC, WEDM, lathe, milling machine, drilling machine, grinder, etc.;

2. Surface treatment: For some products that require subsequent processing, we can provide surface treatment services to achieve the special purpose of customers. At present, we can provide degreasing, polishing, electroplating (gold, silver, nickel, tin, galvanized, etc.), anodizing, electrophoresis and other surface treatment services for precision parts.

Moulds and Inspection Fixtures

1. Mold service life: usually semi-permanent. (except for lost foam)

2. Mold delivery time: 10-25 days, (according to product structure and product size).

3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.

Quality Control

1. Quality control: the defective rate is less than 0.1%.

2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements

3. Testing equipment: automated visual inspection equipment can carry out 100% inspection of products, spectrum analyzer, golden elephant analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine.

Application

MF material injection molding parts are used for resin processing of glass, tableware, decorations, electrical accessories and shells, switchboards, mechanical parts, auto parts, liguang boards, coatings, adhesives, containers, paper, and cloth.