Analysis Methods of mold

Simulation analysis method based pipe die polymer melt was analyzed using the method according to the processing rheology of the polymer knowledge , theoretical equation solving .
But in the solution process , you must  electrofusion coupling mould remove some of the smaller factors that influence on the flow process some reasonable assumptions to simplify the solving process . Simplify the calculation conditions used are: ( 1 ) Melt is a power law fluid ; ( 2 ) steady laminar incompressible ; ( 3 ) full development flow ; ( 4 ) no-slip ; ( 5 ) does not consider gravitational and inertial forces .
First, to determine the geometric modeling parameters : Determine the basic data to simulate the experience of the tube  plastic coupler fittings mould through the nose design method , the main parameters are: diversion angle 54 °, shunt length (L1) 80mm, compression angle 30 °, stent length (L2 ) 22mm, compression length (L3) 120mm, hole drilling stereotypes length (L4) 60mm, die inside diameter of 30.65mm, mandrel outer diameter 24.146mm, compression section inlet diameter (D2) 94.958mm, tapered end of the shunt diameter ( D1) 82.938mm. Due to the changing needs of the simulation model of safety chucks some geometric parameters , so you want to change the PE Electrofusion Pipe Fitting  geometric parameters using parametric modeling method. Since the calculated amount of reasons, the analysis process , to select only a greater impact on the product parameters analyzed . Studies selected diversion angle , angle and shape compressed length as the analysis parameters. These parameters are related to the parameter of the model (due to shunt rounded inner and outer cone section and setting the value assumed to be constant , so that D1 and L1 determine the angle α and the shunt L1, L2, L3, L4, D1 and D2, D2 and L3 decision compression angle β).

Domestic mold industry needs to accelerate the transition to deal with the cost advantage of weakened

Nearly a decade , China's automobile industry has made considerable progress . Prospects Industry Research Institute , " China's auto production and sales demand forecasts and mold industry transformation and upgrading Analysis Report " shows that domestic car sales by 2001 the rapid increase of 2,358,500 to 18,505,100 in 2011 , a compound annual growth rate of over 20% , in which the automotive panel die demand CAGR car plastic pipe fitting mould  is up more than 30% . At present , China 's mold industry output value of over $ 100 billion industry, one of the main application as a mold downstream automotive industry, China is about 1 /3 of the mold products for the automotive service industry .
Although in recent years the domestic mold exports increasing level of international competitiveness has improved . But mostly concentrated on middle and low areas , low mold technical level, low value-added, high-precision molds also part dependent on imports , so the domestic mold industry in various fields to strengthen integration.
Throughout the development process, related industries and businesses need long-term perspective , the potential lower mind, pay close attention to new technologies, new technology research side , and gradually form a division of labor , there is collaboration in all areas of research and development pattern, introduced with proprietary mold products. Now China's mold industry through the introduction of foreign capital , absorb the advanced experience of foreign mold manufacturing , advanced technology and high-level talents , our mold design and manufacturing level has been greatly  Plastic Adapter Union mould improved. " With the increasing domestic demand in China can be expected to die by 2013 China will have a larger growth industry , especially the automotive industry, has led to the rapid development of China 's mold industry , promote the rapid transformation and upgrading of mold enterprise ." Luo Baihui mold experts believe , strengthen independent innovation in the industry change the growth mode , optimize the industrial structure, have a greater need high levels of mold machinery and equipment, providing a broad development space for the development of mold industry . More importantly , "five " the implementation of development policies and emerging strategic industries, regional development planning and policy to revitalize the equipment manufacturing industry will die industries are providing new growth point. With manufacturing in developed countries have to transfer to China , China's mold industry is facing a new round of development opportunities. Forecasts , and the internal and external drives Qi moving environment , to 2015, China's mold will reach 350 billion yuan sales value . Currently, China is facing the dual End Cap mould  pressures of technical superiority and developing countries , the price advantage of the developed countries. In the competitive advantage of high-end mold China mold industry to become a huge challenge , India, Thailand and Eastern European countries a few years , industry has developed very rapidly in recent mold , mold its price also has a strong competitive advantage , China 's mold industry , the cost of and price advantage will gradually diminish and eventually disappear.

Mold industry demand growth trend of differentiation

This year, affected by many factors, such as complex domestic and international environment, face greater downward pressure on industrial growth. In the main tone of steady growth, expanding domestic demand, various policies have been launched to promote the rapid and steady growth in investment, and promote the overall recovery in the mold industry, China's industrial economy is generally stable, steady progress in structural PE Electrofusion Pipe Fitting  adjustment, industrial growth is expected in 2013 more than 15 die % international environment is still full of complexity and uncertainty, shrinking external demand situation is difficult to significantly improved, and because of slower growth in factor inputs, reduced efficiency of industrial investment mold, mold industrial economic downward pressure is still large. Three die stimulating industrial growth demand trends differentiation, will present investment stabilized, soft consumer trends, exports slowing trend. Investment, the direction is clear and the lingering effects. Domestic construction boom emerged Mold City, Mould Industry Mould City real estate investment and investment growth showed an upward trend. Commercial real injection mould  estate bubble of the past few years the development of aspects of resource allocation, economic structure and income distribution have had a serious negative effect, so the current round of real estate regulation will exceed the previous cycle. Meanwhile, the real estate investment and export demand and other related real estate and mold manufacturing to industrial markets to high-end development, mold manufacturing investment growth could rise further this year compared. Investment expansion in the mold industry is likely to shift the focus of urban transportation and other infrastructure as well as LED, medical and other industries, thus promoting investment in infrastructure and social services increased investment. Moreover, taking into account the investment in fixed assets this year, the total investment in new projects and is currently picking up the cumulative growth rate maintained at a relatively high level since May this year, which bodes well for next year's fixed asset investment growth is likely not to some extent there will be a substantial decline in the case of virtual tired out, the investment continues to be an important force for steady growth.
Although large-scale infrastructure investments no longer exist, but to show steady growth taking into account the national macro-policy effectiveness, investment in infrastructure, construction and other city will die steadily, more likely in 2013 to stabilize the growth of mold industrial investment, estimated annual growth rate of industrial investment mold maintained at more than 30% of fixed asset investment growth will remain at around 20%. Consumption, endogenous firmer but growth is slowing down. Canceled by the vehicle purchase tax incentives, real estate purchase, the impact of restricting the number of car Yaohao factors such as policy control, since this year the growth rate of real consumption of Chinese residents remained at low volatility. Although prices continued slow growth, personal income tax policy to gradually adjust and continue to expand social protection surface and other factors will tend to lead to enhanced endogenous consumption, but to promote income distribution reform will take time, relying on the consumer to stimulate economic growth in the short-term model difficult to establish. Taken together, the overall growth in consumer demand will remain modest growth trend slightly soft trend, consumption growth is expected to remain at around 14.5%. Export growth will remain low. From the outside, the slow U.S. economic recovery will continue to support China's exports to the United States to  tapping tee electrofusion mould maintain moderate growth, and sustained decline in the European economy and the slowdown in emerging economies will affect the overall performance of China's exports; from the internal point of view, China's population structure changes in factor prices and environmental reforms, such as strengthening the supply-side changes will further push production costs for the mold industry competitiveness and exports have a significant negative effect. In addition to the above factors, taking into account the appreciation of the renminbi and rising protectionism in trade and other factors, external demand in the longer term will remain weak state, the future is not as a stabilizing force in supporting industrial growth. Think of mold industrial export growth will moderate growth, showed significant slowing trend, but the possibility of a further sharp decline in the smaller mold industry estimated annual export value growth remained at around 10%. On the whole, taking into account the stimulating effect, the base effect of macroeconomic policies and other factors, combined with our forecast model,
Due to the lack of high-end products, parts and components industry is seriously lagging behind the development of basic, structural overcapacity in the shipbuilding industry issues still outstanding, automobile consumption will remain subject to some constraints, own-brand cars structural overcapacity will continue. China's mold equipment industry growth will slow in the stabilization, which was slow in the raw materials industry overall stabilization of the situation. January to September this year, above-scale industrial added value increased raw material of 10.15%, the annual growth rate of industrial added value up is expected to remain at about 10%. With the slow recovery of the international economy and domestic economic stabilization and recovery, structural recovery in domestic demand growth, the export situation will be eased, production growth will be China's mold industry rebounded slightly. Eastern industrial production growth will continue to slow down, the Midwest will continue rapid growth. From a regional perspective, because the various regions in which the different development stages of industrialization, the growth rate showed a clear differentiation trend, namely the eastern industrial added value was in the low mold growth, central and western regions is growing rapidly, and this trend in 2013 will continue. Accelerate the construction of infrastructure, investment in fixed assets in central and western regions the power of strong first three quarters of 2012, the six central provinces were higher than the national growth rate of investment, including investment of 10 billion half of the provinces. Due to the central and western regions is in the middle of industrialization, investment-driven features are still evident, with greater growth potential and vast room for improvement is expected in 2013 in the central and western regions will die of industrial added value grew by 11.5% and 13%, respectively about.

Microcomputers and mold industry

To efficiently use these tools must also have advanced CAD / CAM software platform, although the hardware, software and the machine itself, the high price and maintenance costs, but due to the use of these technologies, so that these companies can greatly shorten the manufacturing cycle of mold improve manufacturing quality and mold manufacturing capabilities, enhanced in the international market competitiveness. Computer manufacturing precision molds for customers telephone company  fittings mould package (of 7) plastic mold, all sophisticated, complex surface parts, the company uses in engineering workstations running UG secondary development of software and systems to quickly build the entire three-dimensional line deputy dies box model to generate toolpath file formed by post-processing of the NC machining CNC machine code. Quality die from contract signing to delivery, the entire cycle of less than three months, we can see that CAD / CAM technology in the mold manufacturing role of self-evident.
Use development of China's mold industry INTERNET past 10 years, China's mold industry is developing very rapidly, CAD / CAM technology, advanced mold processing equipment and new technology enterprise in many mold has been applied and spread, making the domestic mold design and manufacturing standards continue improved, although some mold on the quality, the domestic enterprises have close to the world advanced level, but our mold companies in production management, manufacturing cycle, quality control, and tapping tee electrofusion mould  other aspects of enterprise scale and efficiency compared with similar companies in developed countries, the gap is still evident.
Mold companies in the information era of global economic integration development, stressing the joint and access and use of information, or the country with the world's large companies conducted a competitive league, learn, and use of these company's experience and market development and grow their own, convert it to their own competitiveness. INTERNET create the necessary conditions and a favorable environment for mold companies to achieve the above purpose. (A) the use of communication INTERNET improve and enrich the means of communication and alliances with large companies, improve corporate design and production environments. (B) the use of remote login feature INTERNET provide relevant databases and information sharing with the electrofusion coupling mould  big companies. (C) the use of information and data query functions INTERNET understanding of developments on related technologies and industries. (D) the use of information on the diffusion function INTERNET product image promotion.
INTERNET the computer's features available a wider range of expansion and extension of the business development and growth catalyst. Domestic enterprises should die with the world, and global synchronization, the best way is to know the current INTERNET, master INTERNET, make good use of INTERNET.
In the colorful market, shortening and improving the quality of the most important mold mold production cycle. Who holds the advantage in these areas, whose market share will increase. Companies want to participate in market competition, we must actively adopt CAD / CAM systems and INTERNET technology, efforts to develop domestic and international markets, while vigorously publicize and use our best to improve the quality of their own, the only way to make China's mold industry to a new level.

Link mold production technology and research

Taking a car engine connecting rod example, the technical requirements are: ( 1 ) quenching , HB220 ¯ 270. ( 2 ) did not note the draft angle 3 ° ~ 5 °, did not note fillet R2 ~ R5; (3) the direction of the metal structure of the fiber longitudinal section along the centerline and should match the rod shape , not a disorder and intermittent , allowed to have pores, cracks , folds , bubbles , delamination , inclusion , and other  plastic injection mould non-metallic inclusions and other defects. ( 4 ) does not machined surfaces should be smooth, not allowed to have cracks , folds , scars , and metal oxide is not full and other defects. Residual fly 5 ) parting edge ≤ 0.8mm, allowing total ≤ 3, the width of ≤ 5mm, ≤ pit depth or ground traces 1mm defect repair , but not in the position of the same cross section . ( 6 ) shall be subject to inspection rod . ( 7 ) does not allow forging defects repaired by welding . ( 8 ) the difference in weight of each batch of forging ≤ 3%.
Car engine connecting rod materials are: ( 1 ) quenched and tempered steel , such as 42CrMo, 35CrMo, 45 , etc. ; ( 2 ) non- quenched and tempered steel , such as C70S6 ( one kind of cracking material ) , etc., the surface after the procedure is no longer machining , the surface quality requirements , and this requires a further increase trend. Further, in order to enable smooth operation of the engine to reduce engine noise and power consumption , high tolerance requirements rod weight , generally less than 5% , this requirement also tends to be improved further . These requirements are very high for forging process for manufacturers of production technology is a challenge , not the conventional production process in general forging , otherwise there will be a lot of substandard goods . Car engine connecting rod and die forging process heating equipment: medium frequency induction furnace, oil furnace . Forging equipment: hot forging press , friction press , high-energy screw press , electro-hydraulic forging hammer .
Mold insert commonly used type and is a two- cavity mold that has a beginning and end forging forging two pairs on a mold cavity , generally  2 inch pvc coupling mould use the open slot with a flash form guide for the locking type or guide pins and bushings mold material class H13 tool steel , using conventional heat treatment , hardness HRC40 ~ 47, die life of about 3000 . The above process and die type commonly used in the current general manufacturers , production technology is more mature and stable, but the rod forging quality in general, it is necessary to be improved. Improve the technical requirements of the production of raw materials found in some raw material manufacturers rod car engine does not fully understand the material requirements , treat it as a general view of the thermal processing of steel , there are many problems caused by raw bar, resulting in the bulk of the waste generated .
Therefore, the proposed increase in raw materials inclusions grade requirements in the standard , the inclusion level not higher than 2 , in order to effectively improve the surface and internal quality.
Car engine connecting rod is generally little change in cross-sectional area , can employ cross wedge rolling billet , while the use of roll forging billet billet system will increase the time and the need to increase the mechanical hand and roll forging machine, so that the operation becomes complicated , reduces productivity improved rejection rate. Forging preform rod car engine uses a rotating outer wedge rolling , cross rolling process this principle is to heat billets placed two co-rotating rolls , making the rough turning and molding surface along the corresponding the reduced diameter and extension. Cross wedge rolling billet with high efficiency , saving raw materials and equipment manufacturing and easy . Meanwhile, the rolling line inside the contour line and the part of the flow , thereby improving the mechanical properties of the product . Currently cross wedge rolling billet technology is a mature technology , such as the Beijing Institute of Electrical and other domestic units can be supplied from process analysis, design and manufacture  tapping tee electrofusion mould of equipment to mold a set of technical services to meet the requirements of manufacturers of forging . Many forging equipment available for car engine connecting rod , how to choose depends on the equipment cost and the amount of investment , hot forging press is generally used in more imports expensive, but its movement works slider crank linkage structure principle , a fixed bottom dead center position , while forging forming, mold drop height is fixed, thus forging a high degree of tolerance, so forgings weight tolerance , good product quality. If large choice of investment . The basic choice of domestic friction press , low prices, its motion principle of rotary motion of the flywheel is converted to screw by screw nut up and down movement , the drop height is not fixed mold and blow energy is not accurate and well -oriented performance , resulting in forging height tolerance big , wrong move , so forging weight tolerance , poor product quality, and therefore , should not be optional .

MasterCAM driven system based card reader preset mold

Design Top surface contour and two lateral contour lines on the half-shell molds using solid modeling in curved contour lines are drawn, to modify it. Approach is to modify the lateral contour lines Xform-Mirror (Mirror) treatment, first select Creat-Surface-Draft (traction), making traction surface contour 1, select Top surface view orientation, the same will be pulling out of the lateral contour intersect the surface; then select Creat-Surface-Fillet (rounded) of two intersecting surfaces with rounded (R = 3). Then hdpe couplers mould  make buttons around the annular bulge, other surface layer can be first masked in order to observe the annular contours pulling up to the surface, and then the corresponding lateral contour of the surface traction with pruning operation. This operation where the work will be shielding layer, select the layer in front of the steps of the work visible, choose Creat-Curve-Project in the main menu (build curves projection), select the ring contour curves, surfaces, objects to the previous step Top surface In the pop-up menu, select Trim entry for Y, choose a good outline of the outside of the reserved area, which will be trimmed a corresponding annular surface area on the surface, as a pre-generated tool path when preparing, empathy can be constructed other surfaces. Finally, the lateral surface contour 3 generated in the previous step to trim surround surface, then trimmed in the middle of the surface profile, thus completing the internal structure of production. Analog  Plastic Ball Valve mould processing mold surface in order to reduce the amount of machining precision machining processing time can be attached to the top surface of a core surface, using parallel processing, tool radius of 10mm ball mill, select additional surface and core peripheral surface for the processing surface, set in Stocktoleaveondrive option to retain 0.3mm, set in StepoverControl (transverse cutting the amount of control) dialog distance of 5mm, Machiningangle processing is set to 45 ° angle to the surface allowance. Set parameters Cuttolerance cutting tolerance options for 0.03mm, cutting method Zigzag bi-cutting, the result is as shown below. Analog processing map and then select the parallel surface roughing method for semi-finishing of all surfaces, use the tool radius of 4mm ball end mill, retention allowance 0.1mm, lateral cutting control the amount of 1.5mm, processing angle is 45 °, still Zigzag cutting when the cutting method, the result as (a). Finally, select Toolthpath-Surface-Finish-Scallop (wraparound), select all the objects surface machining, tool selection radius of 4mm ball end mill, allowance is zero, the transverse cutting control the amount of 1mm, cutting tolerance of 0.008mm, finally The results obtained as processing (b). According to the simulation results of processing, comparing mold design requirements do not meet the requirements of the Department, modify or adjust accordingly when the knife analog processing, processing steps, such as cutting the amount, if necessary, to modify the design of the mold surface adjustment. After several changes, you can send CNC machining, mold satisfactory conclusion through computer simulation and processing, increasing the certainty of a successful machining, processing and simulation ideas proved this method is feasible.