During the injection molding process, when the molten plastic meets in the form of multiple strands in the cavity due to the holes in the insert, the areas where the flow rate is discontinuous, and the area where the filling material flow is interrupted, a linear weld seam is produced because it cannot be completely fused. In addition, when the gate injection molding occurs, a weld seam will also be formed, and the strength and other properties of the weld seam are poor. The main reasons are as follows: Pvc Injection,Precision Plastic Injection Mould,Oem Plastic Injection Crate Mould,Plastic Injection Mould Suzhou Dongye Precision Molding Co.,Ltd. , https://www.sjinjectionmolding.com
"Light truck sales have fallen sharply this year. We are now negatively growing." A few days ago, when reporters interviewed the Liaobu Automobile Market, a light truck dealer expressed such a feeling. It is understood that from January to August this year, the total light truck market in Dongguan totaled about 4,000 vehicles, an increase of 1% to 2% year-on-year. Sales of mid- to high-end light trucks represented by Qingling and Jiangling increased little, and some even appeared. A sharp decline.
With the market volume basically flat and sales volume of mid- to high-end light trucks declining, low-end light trucks priced at RMB 30,000-50,000 will be the biggest gainers.
Industry analysts believe that due to the impact of anti-dumping measures, rising costs, and low quality domestic light trucks in Dongguan, the Dongguan factory’s light truck purchasing power has shifted towards low-end light truck products, and the low end of 30,000-50,000 yuan. Light trucks are becoming mainstream products in Dongguan's light truck market.
Reasons The factory is difficult to profit to buy people to transfer
Industry analysts believe that one of the main reasons for the decline in the sales volume of mid- to high-end light trucks is the change in the economic structure of Dongguan. The main purchase group of mid- to high-end light trucks - factories are facing multiple crises such as rising costs and falling profits, and then switching to buy low-end light trucks or simply cancel the purchase plan.
Jun Liu, a dealer of Junyu Motors, also believes that among the consumer groups in the entire light truck market, all are non-locals. “The purchasing power of foreigners is inherently limited.†With the increase in factory costs, purchasing power also drops or shifts. This is also the reason why the total sales of light trucks in Dongguan were unchanged from last year, but the sales of high-end light trucks declined.
Homogeneous competition
Liu Wei believes that another important reason for the decline in the sales volume of mid- to high-end light trucks is product homogeneity. Domestic technology trucks have risen to a stable level. The quality of medium and low-end trucks has improved, and the low-end and mid-end light trucks have lower costs for use and maintenance. The factory purchases light trucks as production tools, and investment and profits can be better. balance.
"The result of homogenization has led to the light truck price being a key factor for consumers to choose, and whoever is cheaper to buy it."
Diesel oil also has an impact on it
Dongguan has a regulation on truck sales. Only locals in Dongguan are allowed to buy trucks, and only one can be purchased. This is the so-called “card restrictionâ€.
The Dongguan Jiang dial manager said that the annual sales volume that was cut by “restricted orders†amounted to 200-300 units. Junyu Motors also stated that the implementation of “restricted card orders†allows Jianghuai to sell at least 20 vehicles each month.
Market analysts also believe that the rise in diesel prices has also affected some people’s car purchase plans.
The current status of sales of high-end light trucks declined
Recently, the reporter learned from a brief interview that the sales volume of JMC light trucks has dropped sharply this year. The monthly average sales volume for the first eight months was only about 90 vehicles, which is in sharp contrast to the situation of the top-selling 200-plus vehicles sold last year.
A person in charge of Dongguan Jiangling revealed to reporters that Dongguan Jiangling completed a total of more than 1,500 sales last year, a lot more than planned for the beginning of the year; this year's sales task was 1600, but as of the end of this month, Dongguan Jiangling only completed seven or eight hundred vehicles. In order to complete the annual mission, "certainly there is a problem," the responsible person said with resignation.
In the case of Yangcheng Automobile, Tan Xiaoliang, sales manager of Dongguan Chengcheng Motors, told reporters that the sales volume of Yangcheng light trucks rose slightly, and the total volume in the first eight months of this year increased by 0.4% year-on-year. Low-end light trucks become the mainstream of the market
Different from the high-end positioning of Qingling, Jiangling and Yangcheng, the brands of Jianghuai, Dongfeng, Ao Ling, Liberation, etc. are relatively inexpensive, some are around 50,000-60,000 yuan, and some are in the range of 30,000-50,000 yuan, but from the beginning of the year. Since then, the sales performance of these brands is very eye-catching, the most typical is the JAC light truck, the average monthly sales of more than 130, with 30,000-50,000 yuan products into the light card mainstream sales market. Liu Wei, sales manager of Dongguan Junyu Motors, estimated that the average monthly sales volume of Dongfeng Light Trucks could reach 70-80 units, and Aubell could reach 50-60 vehicles. The sales growth was more obvious.
In the low-end light truck market, industry sources said that from the analysis of sales trends this year, JAC, Dongfeng and Ao Ling have become the mainstream brands in the low-end light truck market.
Industry Voice III countries have a great impact on emissions standards
The Dongguan Environmental Protection Agency recently confirmed by an interview with the media that Dongguan will implement State III emission standards for motor vehicles on roads in Dongguan after Guangzhou and Shenzhen. After the news came out, it attracted a lot of attention in the automotive industry in Dongguan, especially truck dealers. Recently, the reporter interviewed some truck dealers.
A dealer Liu told reporters that except Qingling, a model equipped with a 4KH engine and a JAC model equipped with a QD32 engine, all the trucks currently on the market could not meet the national III emission standards. For future situations, He is not optimistic.
According to another report, at present, although domestic light truck manufacturers can make vehicles meet the National III standard in terms of technology, the manufacturing cost will exceed the market capacity. For example, now the light truck of 50,000 yuan, after the emission standard of Daguo III, the price is at least 60,000 yuan.
This reporter learned that dealers have adopted a wait-and-see attitude toward implementing State III emission standards in Dongguan during the year. All dealers have said that they have not yet received official documents issued by the Dongguan environmental protection department. However, the preparation work was carried out in secret. Some dealers were cleaning the inventory of vehicles.
Processing:
The injection pressure and speed are too low, and the barrel temperature and mold temperature are too low, resulting in premature cooling of the molten material entering the mold and the appearance of weld seams.
When the injection pressure and speed are too high, injection will occur and weld seams will appear. The speed should be increased, and the back pressure should be increased to reduce the viscosity of the plastic and increase the density. Plastics should be dry well, recycled materials should be used sparingly, and weld seams may occur if the amount of release agent is too much or the quality is not good. Reduce clamping force and facilitate exhaust.
2. Mould:
If there are too many gates in the same cavity, reduce the gate or set it symmetrically, or set it as close as possible to the weld seam. The exhaust at the weld seam is poor, and an exhaust system should be set up. The sprue is too large, the size of the gating system is improper, and the gate is opened to prevent the melt from flowing around the insert hole, or use as few inserts as possible. If the wall thickness changes too much, or the wall thickness is too thin, the wall thickness of the workpiece should be uniform. If necessary, a fusion well should be opened at the fusion seam to separate the fusion seam from the workpiece.
3. Plastic aspects:
Lubricants and stabilizers should be appropriately added to plastics with poor fluidity or heat sensitivity. Plastic contains a lot of impurities, if necessary, replace the plastic with good quality.