How to choose a vertical injection moulding machine, because the vertical mold clamping and vertical injection, the upper mold is movable and the lower mold is fixed. Straight injection molding machine is the most optimal solution for injection molding of embedded parts. The most basic four elements of injection molding machine are selected:
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1. Modulus of modulus, which is the length*width*height of the mold, choose the specific specifications suitable for the factory product mold and slightly larger than the mold, which is the effective spacing within the Corinthian column;
2. The injection quantity is generally calculated by the plastic material PS, and the unit is ounce (oz), because the PS density ratio is a vertical centimeter and the specific gravity is 1.05g, which is the conventional calculation unit. Different plastics have different structural density ratios, so it is necessary to choose the product's net weight water inlet compared with the most effective injection volume of the injection molding machine. It is not more than 80% and not less than 20% for the suitable model;
3. Product accuracy says that the accuracy of plastic products is directly related to the purchase and configuration requirements of the machine. For example, engineering plastics must use alloy screws and feed tubes, and the screw L/D ratio is more than 20 times. In order to achieve good plasticization standards and requirements. According to the precise requirements of the product, specific pressure + specific flow or semi-closed-loop or full-closed oil circuit control can be selected;
4. The clamping force is the most important part of the injection surface, and the clamping force is expressed in units of tons (T), the standard for choosing the clamping force is the length * width * of the plastic product and the internal resistance of different plastics.
Classification of vertical injection moulding machine: vertical injection molding machine can be divided into the following categories
1. Vertical injection moulding machine series: This model is mainly used for injection molding of connection lines, various types of electronics, computer data lines, and power plug lines. The precision standards of injection products are not high. Generally, plastic injection materials such as PVC and PE are used for injection molding. As the dominant, the specific applicable model specifications suitable for this product generally have a clamping force ranging from 15T to 35T. Due to the different specific modulus and configuration of each manufacturer's model, the manufacturer must be asked before purchasing. The factory determines the specific parameters and specifications of the model.
2. Vertical and horizontal injection molding machine, C-type injection molding machine series: the machine's vertical mold clamping, horizontal injection molding because there is no guide column, because the mold clamping part into an English letter 'C' is named. The machine has a complicated structure and a large injection volume. Due to the wide operation area of the guide column, it is mainly suitable for injection molding of various safety power plugs, such as French heads, American plugs, and British plugs.
3. Vertical single-slide-type injection molding machine and double-slide-type injection molding machine series: This machine is mainly for engineering plastics. The products have strict precision requirements. Precision or small inserts are injection molded together, which is also the most optimized for injection molding of inserts. One of the molding programs. Because the machine has the function of fixing the upper mold and sliding the lower mold. The double slide plate type has an upper mold and a lower mold, and the two molds are alternately operated, which is more suitable for inserting or removing precision hardware. General shaped products, such as electronic precision connectors, mobile connectors, integrated circuit components, etc.
4. Vertical disc injection molding machine, rotary series: The vertical disc injection molding machine rotary series can be said to be the most optimal solution for embedded injection molding of precision parts, because the machine can design one upper die two lower die or multiple lower die Function, compared with the advantages of complex embedding and labor saving
How to choose the right injection molding machine
Injection molding machine is a common injection production design. For operators who use injection molding machines, they should first understand the performance of a good injection molding machine, and what aspects need to be evaluated in order to choose a satisfactory injection molding machine. Let 's take a look at what you should pay attention to when purchasing an injection molding machine.
Injection molding
Some technical parameters when buying injection molding machines. Users can judge through the comparison of vertical or horizontal direction when purchasing injection molding machine. The so-called "longitudinal" means that the main technical parameters of the injection molding machine should meet industry standards, and be reviewed according to industry standards. The so-called "horizontal" is compared according to the technical parameters of similar injection molding machines at home and abroad.
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When choosing a supplier of injection molding machines, it is best to choose a manufacturer with a nearby service office to purchase it, because the structure of the injection molding machine is relatively complicated, and various problems will inevitably occur. Fast after-sales service is critical.
Don't blindly ask for low prices when purchasing. Now the prices of accessories on injection molding machines are very different between domestic and imported, so you have to figure out what brand of accessories the manufacturer uses. Of course, there are some accessories that you can't see, so the visibility and credibility of the manufacturer is very important at this time.
Injection
When choosing the model of the injection molding machine, the injection amount and clamping force of the injection molding machine are the most important parameters. In order to ensure the quality of processed products, the weight of the actual mold product should be within 70% of the theoretical injection volume. Then calculate the required clamping force. And pay special attention to whether the distance between the columns of the machine, the mold opening stroke and the minimum mold thickness are suitable for the mold. Prevent the mold from failing to fit or have insufficient mold opening stroke.
We must have the simplest operability when purchasing injection molding machines. The injection molding machine should make its operation and management more humane, the operation should be simple and convenient, and the displayed parameters should be clear and easy to understand at a glance. It has the function of parameter selection, product quality control, mold data storage and display of various parameters, which can quickly diagnose and eliminate faults, reduce material waste in the shortest time, and ensure normal system operation.
Injection molding machine
The main points of purchasing an injection molding machine are the stability, reliability, safety and service life of the machine. The stability of the machine is mostly reflected in whether the mold clamping mechanism and the injection system of the injection machine are stable during operation, and works in a silent and non-impact manner, and the noise must not exceed the industry standard. These conditions are related to the mechanical manufacturing and assembly accuracy, as well as the rational design and structure of the elbow connecting rod. Reliability and service life are mainly reflected in the system rigidity of the clamping mechanism, which is related to the structure and size of the template, tie rods, connecting rods and their pins, as well as materials and heat treatment processes;
The injection molding machine system such as the barrel, screw, screw head, check ring, and the structure and manufacturing process of the driving spindle of the screw. These parts are the main force and wear parts of the injection machine, which directly affect the service life.
Injection molding
The safety of injection molding machines is very important. When the mold clamping mechanism opens and closes the mold, the reliability of the low-voltage protection system involves safety. Modern injection molding machines require the implementation of a combined electrical, mechanical, and hydraulic safety protection system. This protection mainly reflects two aspects: one is the safety protection of the mold, and the other is the personal safety protection. Before the mold is closed, when the safety door is not closed, the mold closing should not be able to move; during the mold closing process, if the safety door is not closed to the correct position, the template action is stopped or the mold is automatically opened. If during the mold closing, foreign objects such as inserts fall into the cavity by reason of vibration or other foreign objects such as hands, etc., the molds should stop the mold closing operation or automatically open the mold and alarm.
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