A better tooling maker in China

 1. The flat ejector pins on the welding ribs need to be arranged more densely, preferably every 50mm. In addition, because the mold temperature is required to reach 90 degrees, the flat ejector pins are easy to pull, so the flat ejector pins need to be treated with titanium plating. 2. The depth of the welding rib is deep, and sometimes there will be air inclusions and poor lighting. It is made into an insert and adopts an embedded structure, which is not only conducive to exhaust but also conducive to the processing of the flat ejector hole. More importantly The most important thing is to facilitate the welding trimming of the orifice flash. 3. The two-color molds of lamps and lanterns are all rotated by moving molds, and the precision of the turntables of injection machines in Taiwan is not too high. The moving mold will drop with the product when the mold is opened, and the product is easy to pull off the given mold. Therefore, the fine positioning of the mold is very important...

 ① Determination of shrinkage rate. If the same material (but different colors) is used for the two injection moldings, and the product has strict requirements on the external dimensions, it is best to set the shrinkage rate twice, but the plastic parts after the first injection molding should be considered as The cavity of the second injection molding will have an impact on the second injection molding; if the plastic parts of the second injection molding account for a small proportion of the entire product, it is not necessary to set the shrinkage rate for the second injection molding product; if The material for the second injection is silicon, rubber or relatively soft materials, and usually no shrinkage rate can be set. Generally speaking, the shrinkage rate of the two-color mold depends on the plastic for the first injection, and the plastic for the second injection and the plastic for the first injection should have the same shrinkage rate. For example, the plastic for the f...

 Two-color mold: Two plastic materials are injected on the same injection molding machine and molded twice, but the product is only molded once. Generally, this molding process is also called double-material injection molding, which is usually completed by a set of molds and requires a special two-color injection molding machine. Two-color molds are becoming more and more popular in the market. This process can make the appearance of the product more beautiful, and it is easy to change the color without spraying, but it is expensive and requires high technology. 1. The two shapes of the female mold are different, and one product is formed respectively, while the two shapes of the male mold are exactly the same. 2. After the front and rear molds of the mold are rotated 180o from the center, they must match. This inspection action must be done during design, which has higher requirements for mold base positioning and processing. 3. The total thickness of the front formwork panel plus...

 Part One. Advantages of 2shot injection molding: The 2 shot mold can combine two resins with different characteristics and colors into a single two-color product, which can reduce the assembly and post-processing of molded products. Save the cost of melting and printing, increase the beautiful visual effect of the product, and improve the grade and added value of the product. Not only has the function of anti-slip and increasing friction, but the flexible resin material makes it more ergonomic and feels better. Two-color injection molding products have high quality stability, easy control of product deformation, short molding cycle and high output, and the loss can be 7% lower than that of plastic overmolding, and the manufacturing cost of products can be 20%-30% lower than that of plastic overmolding. Part Two. 2 shot molding principle Two-color injection molding usually refers to the molding of two colors or different types of plastics. Since the two sets of injection units and ...

 The characteristics of the two-color mold: 1. The two shapes of the front molds are different, forming 1 product respectively. And the two shapes of the back mold are exactly the same. (Note: If there is any difference, make a front mold slider to ensure that the rear mold is consistent) 2. After the front mold of the mold is rotated 180º from the center, it must match the rear mold. This must be taken into account when designing. 3. When designing, please carefully check the parameter data of the two-color injection molding machine, such as the maximum mold thickness, minimum mold thickness, distance from the ejector pin hole, etc. 4. The nozzle of the three-plate mold should be designed to be able to automatically remove the mold. Pay special attention to whether the demoulding action of the soft glue nozzle is reliable. 5. When designing the cavity for the second injection, in order to prevent the cavity from inserting (or scratching) the glue position of the product that has b...

 The first principle: determine the viscosity of the combination of hard glue and soft glue. In addition, it should be noted that the melting point of hard glue is higher than that of soft glue. Don’t melt the hard glue when forming soft glue, otherwise it will not work. 1. The first shot: Hard glue: PA66+ The second shot: Soft glue: TPE The combination is OK. 2. The first shot: Hard glue: PC/ABS+ The second shot: Soft glue: PC The combination is OK. 3. First shot: Hard glue: PP+ Second shot: Soft glue: TPU Combination will not work, because PP material and TPU material are incompatible. The second principle: Make sure that the second shot of soft glue and the first shot of hard glue cannot fall off after molding. 1. When the first shot of hard glue is used to seal the second shot of soft glue, try to use a flat surface to seal the glue. 2. If the side or inclined roof is sealed, try to steal 0.1~0.15MM of the hard rubber seal, and use the mold steel position to seal the glue. The ...

 Injection molding is a process that was developed based on microfabrication techniques such as LIGA, but there are of course many other methods. The LIGA process is to first produce a model required for injection molding, which is commonly known as "mold", and then pour liquid plastic into the mold, and finally separate it to form the final required product. For example, some Automotive parts have too many products. Injection mold processing is to add plastic to the mold first, and then the mold is continuously rotated along two vertical axes and heated. The plastic in the mold is gradually and evenly coated and melted and adhered to the entire cavity of the mold cavity under the action of gravity and heat energy. On the surface, it is formed into the desired shape, and it is made by cooling and setting.

 Advantages and disadvantages of injection molding Injection molding: Also called injection molding, this method is injection and molding. Injection molding has many advantages. The general summary is fast production speed, high efficiency, automatic operation, various designs, simple shape, small size, accurate product size, convenient product update, complex shape, etc. And it is suitable for molding and injection molding processing fields such as mass production and complex shape products. Summarize: 1. Process cost: the mold cost is high but the unit cost is low; 2. Typical products: automotive plastic parts, consumer electronics plastic casings, etc.; 3. Suitable for production: generally only suitable for mass production; 4. Quality: the surface precision is extremely high, and the shape error of the same batch of products is very small; 5. Speed: 30s-60s/piece; Factors Affecting Injection Molding Quality 1. Injection pressure: The reason for injection pressure is to offset t...

     We can help you  making quality molds and VHP had huge experience in making automotive. Especially for Lighting tool   Below I shows you a center console tooling pictures for your reference, if you want to know our tooling quality please feel free to let me know.   Looking forward to hearing from your further feedback soon.    

  羧甲基纤维素 cn |cellulose nitrate |硝酸纤维素  cpe |chlorinated polyethylene|氯化聚乙烯  cpvc |chlorinated poly(vinyl chloride) |氯化聚氯乙烯 ep |epoxy, epoxide|环氧树脂 epm |ethylene-propylene polymer |乙烯/丙烯共聚物 eps |expanded polystyrene |可发性聚苯乙烯 eva |ethylene/vinyl acetate |乙烯/醋酸乙烯共聚物 hdpe |high-density polyethyleneplastics |高密度聚乙烯 hips |high impact polystyrene |高抗冲聚苯乙烯 k胶| styrene- butadiene |苯乙烯/丁二烯共聚物 lcp |liquid crystal polymer |液晶聚合物 ldpe |low-density polyethyleneplastics |低密度聚乙烯) lldpe |linear low-density polyethylene |线型低密聚乙烯 lmdpe |linear medium-density polyethylene |线型中密聚乙烯 mbs |methacrylate-butadiene-styrene |甲基丙烯酸/丁二烯/苯乙烯共聚物