Cable-stayed horizontal injection molding machine

Abstract

The invention relates to a cable-stayed horizontal injection molding machine comprising a lathe bed, a screw rod, a charging barrel, a hopper, an injection cylinder, a connecting rod mechanism, a die assembly mechanism and a die locking mechanism. The cable-stayed horizontal injection molding machine is characterized in that the connecting rod mechanism is connected with a die assembly cylinder, the die locking mechanism is hinged with a die locking piston disk, the die assembly and the die opening adopt a cable-stayed crank cylinder mechanism, and the die locking adopts a disk type cylinder mechanism. The cable-stayed horizontal injection molding machine has the characteristics of simple structure, low cost, wide adaptability and the like, strengthens die locking capability, improves injection area and is safe and reliable.

Description

technical field [0001] The invention relates to an injection molding machine, in particular to a cable-stayed horizontal injection molding machine. Background technique [0002] Injection molding machine refers to the method in which the heated and melted material is injected into the mold cavity by high pressure, and after cooling and solidifying, a shaped product is obtained. This method is suitable for mass production of parts with complex shapes and is one of the important processing methods. The injection molding process can be roughly divided into the following six stages: mold clamping, mold locking, injection, pressure holding, cooling and mold opening. At present, injection molding machines on the market are generally divided into vertical and horizontal types, and horizontal injection molding machines are widely used by users due to their advantages such as simple structure, convenient feeding, fast injection speed, and low workshop space required. Many types of h...

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Problems solved by technology

[0006] However, the inventor found after research and market research that the above patents still have the following problems: after this type of injection molding machine has been used for a period of time, due to the wear and tear of the oil cylinder, the fixed platen and the movable platen, the action positions of the mold clamping and mold locking mechanisms are not correct. Too accurate, resulting in mold clamping failure (not in place or over place); mold clamping is not tight or too tight, that is to say, when the machine base is deformed by torsion, it will make the injection tube correspond to the injection position of the module slightly. Offset phenomenon, causing misalignment of the injection material, resulting in unstable product quality

However, the inventors have found that since the injection pressure of this type of injection molding machine is high, a huge pressure is generated in the mold cavity at the moment of injection. If the clamping force is insufficient, the product will cause flashes, thereby affecting the quality of the product. Rigid hinge at the place, the wear of the upper and lower connecting rods is often inconsistent during use, so that the upper and lower clamping molds are unbalanced, and finally lead to mold expansion during mold clamping injection molding, which directly affects the qualified rate of plastic products. In addition, due to Most of its mold clamping and clamping mechanisms are manual bellcrank mold clamping and clamping mechanisms. This mechanism is heavy, and it is quite laborious to open and close the mold. The clamping force is completely generated by the bellcrank booster mechanism, which is required to complete the mold locking action. The force is very large, the labor intensity of the workers is high, the efficiency is low, and the production cost is high. Moreover, when the mold is opened, due to the existence of the clamping force, the moment the crank throw shrinks from the straight state, the crank throw booster mechanism relieves the pressure. The reaction force causes the handle to quickly swing and reset, and the worker must hold the handle tightly to open the mold. The operation safety performance is poor, and in severe cases, personal safety accidents are also caused.

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