Screw slippage is one of most seen injection molding errors for an plastic injection molding manufacturer. So knowing what are the screw slippage reasons and treatment of injection molding machines is very important for every plastic injection moulding engineer and factory or workshop manager. When the injection screw is difficult to press the material at the feeding port, or the length of the barrel cannot form enough adhesion to convey the material, then the screw will slip. In the stage of screw pre-molding, when the screw rotates in the barrel to convey the material along the direction of the screw and retreats to accumulate the material for the next injection, the screw will also slip. If the screw starts to slip during the pre-molding phase, the axial movement
Read more →Advantages and disadvantages of injection molding Injection molding: also known as injection molding, this method of injection and molding. There are many advantages of injection molding, and the general summary is fast production speed, high efficiency, automatic operation, variety of design, simple shape, small size, accurate product size, convenient product update, complex shape and so on. And suitable for mass production and complex shape products and other molding injection processing fields. Factors affecting the quality of injection molding 1. Injection pressure: the reason for the need for injection pressure is to offset the resistance in the process of melt flow, or the resistance in the flow process to eliminate the pressure of the injection machine, the two are just the opposite, in order to ensure the smooth progress
Read more →Do you know what’s the hopper in IMM ? Hopper alwalys called barrel.Like screw, it is an important part in plasticizing injection device of IMM. The barrel is on the periphery of the screw, containing the screw, and the screw rotates in the barrel. The working environment of the barrel is the same as that of the screw. They both work in the environment of high temperature, high pressure, corrosion and greater friction. Function of hoppers : The hopper and screw constitute the extrusion system. The barrel is also working under high pressure, high temperature, severe wear and certain corrosion conditions. In the extrusion process, the cylinder also has the function of transferring heat to or from the material. The structure of hoppers
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What Is Injection Molding Clamping Unit? A clamping unit for an IMM is used to keep the mold shut against the forces developed when injection pressure pushes plastic into the closed mold. It includes a drive mechanism for moving a moving platen of the injection molding machine in at least one direction. Some think there are only 2 types of clamping units for injection molding, while actually there are 3. 1.Injection Molding Toggle Type Clamping Unit: A toggle clamping unit for an IMM includes a toggle link, a crosshead connected to the toggle link, and a driving device for driving the crosshead. People mainly use it for high speed injection molding. Due to the different angles to the toggle position has a decelerate interval before the mold touchpoint that can
Read more →1.Check how the machinery works Before starting, the injection molding machine and auxiliary machine must be inspected to ensure that the equipment is in normal condition (according to the requirements of L1 equipment operation records). If any problems are found, the maintenance personnel should be notified in time. 2.Power supply for injection molding machine Turn on the power supply of the injection molding machine, the mold temperature of the mechanical and electrical source, the general mold temperature is set to 80℃, the drying mechanical and electrical source (raw materials need to be dried at 80℃ for 4 hours), the cold water mechanical and electrical source, the exhaust fan and other power supply, turn on the injection molding machine oil pump motor screw and begin to heat up. 3.Grease
Read more →Injection molding machine is a special equipment which combines the hot working characteristics of plastics with the principle of melting die casting of metals. The original plunger injection molding machine was not developed until the late 1940s until the preplasticized screw injection molding machine. Since then, the focus of development is mainly around the pre-plasticized screw injection molding machine, has since appeared twin screw, exhaust and other advanced forms. In 1980, France produced the world’s largest screw injection molding machine, with an injection capacity of 170kg. From the 1980s to recent years, the development of injection molding machine is mainly concentrated in several aspects: namely, the application of precision automatic control system and various auxiliary equipment in automatic molding; Precision machinery and high performance hydraulic system; Various special
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Why we need to set mold protection to prevent damage? Beside the injection molding machine itself, the second most expensive piece of equipment we use on a daily basis is the mold. If the molds are damaged, you are not only responsible for the cost of maintenance, but also for downtime and labor costs.If done correctly, the mold can rest on something as thin as a business card. Here are three key components for setting up mold protection on injection molding machines: 1. Starting position of mold protection When do you reach the point in the mold where you might break when the mold is closed? In the figure above, this point is when the mold touches the guide pin. This is where we
Read more →Plastic injection mould is generally composed of forming parts, pouring system, guiding part, pushing mechanism, temperature control system, exhaust system, supporting parts, side parting and core pulling mechanism. Simple description of each part of the injection mold Figure 1-1 Basic structure of the plastic injection mold 1. The forming parts refer to the parts related to the forming cavity of the moving and fixing parts. 2. The pouring system is to melt the plastic 3. Guide part in the injection mold, the guide part is used to guide the dynamic and fixed mold of the mold, so that the mold can be accurately matched when the mold is closed. 4. Push out mechanism refers to the device that pushes out the plastic parts from the mold after parting.
Read more →The use of injection molding machine is becoming more and more of a concern in the industrial industry currently,. Do you know why people want to use injection molding machine? What good does it bring? Here are some of my views. Only for reference. Plastic Moulding Advantages 1.Fast Cycle times can be as low as 10 seconds. Combine that with a multi-impression injection moulding tool and you get a LOT of products very quickly. Generally speaking， it takes a bit longer as it’s a specialist material and has a lot of features to be moulded correctly, but at about 50 seconds you’d still get 70 parts per cavity per hour. CNC machining a one-off would take half a day – 3D printing it even longer! 2. Low cost
Read more →In the existing injection molding industry are faced with: Raw material increase Labor costs have skyrocketed Difficulty in recruiting staff Large turnover of personnel Product price decline The problem of increasingly fierce competition in the industry. I njection molding industry has entered the era of transformation, small profit and reshuffle, injection molding workshop management needs to establish a “scientific, perfect, systematic, standardized” operation management system, so that “everything is managed, everyone is in charge” of the working atmosphere of the department, for the injection molding workshop each post work efficiency improvement, manpower reduction has the following measures and suggestions: First, the upper and lower mold workers to improve work efficiency, reduce manpower measures 1. Do a good job in the production planning arrangement to reduce
Read more →First, the working principle of injection molding machine Injection molding machine for short injection molding machine. Injection molding is the use of plastic thermophysical properties, the material from the hopper into the barrel, the barrel outside the heating ring heating, so that the material melt, in the barrel is equipped with external power motor drive rotating screw, material under the action of the screw, along the screw groove forward transportation and compaction, the material in the external heat and screw shear under the double action gradually plasticized, melting and homogenization, When the screw rotation, the material in the screw groove friction and shear force under the action, the molten material pushed to the head of the screw, at the same time, the screw in the material reaction backward,
Read more →Injection molding process Mobile phone shell is usually made of PC(polycarbonate) or PC+ABS material molding, due to the relatively poor liquidity of PC, so the process is usually filled with high mold temperature, high material temperature; The gate used is usually the point gate, and graded injection molding should be used when filling, to find the gate position and the V-P(injection – pressure maintaining) switching position, which will be of great help to solve the gate mark and underinjection fly-side and other anomalies. The following is the main molding conditions of mobile phone products, introducing the melt temperature, mold temperature, injection speed, back pressure and other molding parameters setting points for attention. Melting temperature and mold temperature The optimal setting of molding temperature is related to many factors,
Read more →Prepare the vertical injection molding machine before starting Check whether each lubrication part is fully lubricated; Check whether the oil pump has abnormal noise; Install and tighten the mold carefully, and pay attention to safety when loading and unloading the mold; Adjust pressure at all levels; Set all levels of temperature. Manual operation and adjustment of vertical injection molding machine Adjust the position of each switch manually to ensure the safety of the die. Set the manual button ON the electronic control panel to ON(open). When the machine is operated manually, each action button ON the electronic control operation panel can only be operated when the button is pressed (ON), and the action disappears when it is released. Mold adjustment: First adjust the die close high voltage proximity
Read more →Several key points to buy injection molding machine: With the rapid development of the plastic industry today, injection molding machine occupies an important position both in quantity and variety. Injection molding machine has the function of forming plastic products with complex appearance, accurate size or dense texture with metal inserts. It is widely used in national defense, mechanical and electrical, automobile, transportation, building materials, packaging, agriculture, culture, education and health and People’s Daily life in various fields. The market is full of various models, different uses of injection molding machine, and how to buy a satisfactory injection molding machine, and what matters to pay attention to when buying injection molding machine, for users has been a very troubled problem. Point 1: Technical parameters of injection molding machine.
Read more →First, classification of injection molding machine: Due to the structure and variety of injection products, so used for molding injection products injection machine types are more. 1. Classify raw materials according to plasticizing and injection methods. 2. Classification according to the shape and structure of the injection machine. 3. Classification according to the processing capacity of injection molding machine. 4. Classification by special purpose of injection machine. According to the classification of plasticizing and injection of raw materials, the injection molding machine can be divided into three kinds: (1) plunger type, (2) reciprocating screw type and (3) screw plasticizing plunger injection type. According to the different shape and structure of the injection machine, it can be divided into (1) vertical injection molding machine, (2) horizontal injection machine, (3)
Read more →How does traditional machining break through the dilemma? The market share of injection caps is gradually expanding, and with the increasing appearance demand of consumers, the role of bottle caps is not only reflected in the sealing, they pay more attention to the appearance of products, such as modeling, refinement, finish and so on. It is bound to have an impact on the production technology of the bottle cap. How to improve the production efficiency while ensuring the quality has become a technical problem in the manufacture of the bottle cap mould. Suction machine will be mixed material into the injection molding machine barrel, heated in the barrel to melt and plasticize state, injected into the mold cavity, cooling in the cavity, demoulding, and then through the ring
Read more →Do you know the types of injection molding machines？ Injection molding machine is divided into the following five types: Vertical injection molding machine Features: Easy to achieve insert molding. Because the surface of the mold is facing up, the inserts are easily placed and positioned. The lower template is fixed and the upper template is movable. If the pull-belt conveying device is combined with the mechanical palm, the automatic insert molding can be easily realized. The weight of the mold is supported by the horizontal template for up and down opening and closing action, will not occur similar to the horizontal machine due to the mold gravity caused by the forward fall, so that the template can not open and close the phenomenon. Equipped with rotary table, mobile
Read more →(1) Injection system Injection system function: injection system is one of the most important parts of injection molding machine, generally have plunger type, screw type, screw preplastic plunger injection type 3 main forms. At present the most widely used screw type. Its function is that, in a cycle of the plastic injection machine, a certain amount of plastic can be heated in a specified time after plasticizing, under a certain pressure and speed, the molten plastic is injected into the mold cavity through the screw. After injection, the molten material injected into the mold cavity is kept in shape. Composition of the injection system: The injection system is composed of a plasticizing device and a power transmission device. The plasticizing device of screw injection molding machine is mainly
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