Plastic basic information

Cavity Surface roughness: Injection mold cavity surface roughness directly affect gloss products, injection molding mold highly polished surface will be bright surface products, Wu Guang injection mold is prepared dull products. Multi-cavity die too if the surface roughness, the surface of the plastic sheet adheres easily mold cavity, the surface roughness value should be less appropriate injection molds. Implied ratio: Depth to width ratio than the plastic parts called extension, extension ratio reflects the ease of molding plastic parts, extension ratio increases, forming harder. And extension than the plastic variety, molding methods. Injection mold fillet: To avoid stress concentration, improve the impact strength, injection mold cavity surface edges and corners should be adopted fillets, corner radii should be equal to or greater than the plate (sheet) material thickness, but not less than 1.5mm. Slope: To facilitate the release, the slope of the mold is generally 0.5 ° -3 °, while the punch is 2 ° -7 °. Suction hole design: The most common is through the evacuation orifice. Suction hole size, quantity to meet the needs of molded plastic parts, generally for good fluidity, thin, plastic molding temperature is low, pumping holes should be smaller; plates thicker, pumping holes can be larger. Vacuum holes shall be designed to meet in a very short time the air out of the injection mold cavity, the article surface without leaving any trace request.

Medical mould devices are divided into a lot of kinds, some products do not contact with the human body, some contact with the human body, sometimes into the body, is different to the requirement of mould material.According to the nature of your product, no product contamination, determine the mold material, as long as to achieve the purpose of without causing harm users, of course this is at the very least, as for the requirement of the rust and prevent the respect such as deformation, should also be taken into account. Longxiang Group limited has good experiences with medical mould, Let us discuss

According to the size of the production capacity, product structure, to determine the appropriate number of cavities, more cavities, precision molds, processing difficulty, the higher the cost of the mold. However, injection molding unit price will decline.Impact of multi-cavity Dimensions factors:1. precision mold machining. For example, the discharge cavity, each cavity is a discharge, if the discharge process control is not good, there will be the size of the cavity bias.2. the mold assembly precision. Because of the internal structure of the assembly causes the position deviation.3. mold design factors, such as the flow channel design is reasonable, into the plastic is uniform, unreasonable runner nozzle chamber so close to advanced gum, gum away from the backward because contraction inconsistent, pressure conditions also lead to inconsistent dimensions appear deviations. Into the plastic mouth diameter size will cause the size of the deviation.4. mold waterway design is unreasonable, in each cavity layout should be uniform cooling water, if it is unreasonable to different temperatures in different parts of the mold, resulting in shrinkage is different, so the size of the deviation.In short, family mold problems are basically the size of a deviation in the mold. Injection molding process has little effect.

As one of our missions is “making every project successful” ,  Longxiang always make sure to take every details into consideration when customers place PO to us. There will be 5 important points during the project process : 1.Quotation start : After receiving PO , the project manager will organize sales"e team to collect technical issues and delivery requirements from customer.2.DFM review : When project started, the design team leader will call out a meeting within 12 hours to confirm the mold structure, propose suggestions ;3.Design review: The design team leader will hold a meeting to update 3D design based on the experience of customer and make sure the quality is good and feasible.4.DFM confirmation: Within 4 hours after receiving machining approval5.Machining review: Within 24 hours after receiving the machining approval, the assembly team leader will have the meeting to unify the process preparation and program.

CNC machining allows customers to have a prototype produced out of the real material instead of a photopolymer or polyamide simulant. From nylon to aluminum, Star Prototype specializes in creating the highest quality CNC  prototypes at low cost to the customer. CNC machining is typically used for projects with 50-100 sets of components, as a simulant material is not sufficient for those types of applications.　　CNC Machining Materials　　Star Prototype can manufacture CNC  prototypes out of the following high-quality materials, among others:　　- PMMA (Lucite Acrylic)　　- PC　　- ABS　　- POM (Delrin)　　- PTFE (Teflon)　　- Ultem　　- Noryl　　- Nylon　　Longxiang can also machine metals by using heat-shrink cutter holders for our high-speed spindles to ensure cutting accuracy. Common metals used for CNC prototypes include:　　- Aluminum　　- Copper-based materials　　- Tool steel.　　Quality & Inspection　　Star Prototype is committed to producing the highest quality CNC  prototypes. To meet this goal, Longxiang have invested in a portable FARO Laser Scanning Arm, which can be positioned next to the machine to inspect 3D parts before they are removed from the machine.