Three-layer flow-guide storage type die head device of blow molding machine

Abstract

The invention discloses a three-layer flow-guide storage type die head device of a blow molding machine. The device comprises a driving mechanism, an injection cylinder sleeve, a die sleeve mechanism,a material storage core pipe; a die mechanism, a composite molten blank injection mechanism and a set of injection push rods, wherein the device has the characteristics in that the composite molten blank injection mechanism comprises a first pushing cylinder sleeve, a second pushing cylinder sleeve, a third pushing cylinder sleeve and a fourth pushing cylinder sleeve, the first pushing cylinder sleeve is arranged in an injection cylinder sleeve cavity, the outer wall of the first pushing cylinder sleeve is provided with a first pushing cylinder sleeve outer layer, middle layer and inner layermaterial guide grooves, the second pushing cylinder sleeve is arranged in a first pushing cylinder sleeve cavity, an outer layer melt guiding device is arranged on the outer wall of the second pushing cylinder sleeve, the third pushing cylinder sleeve is arranged in a second pushing cylinder sleeve cavity, a middle layer melt guiding device is arranged on the outer wall of the third pushing cylinder sleeve, the fourth pushing cylinder sleeve is arranged in a third pushing cylinder sleeve cavity, an inner layer melt guiding device is arranged on the outer wall of the fourth pushing cylinder sleeve, and an upper pressing ring is fixed on the upper end face of the fourth pushing cylinder sleeve; the lower end of the material storage core pipe extends into a fourth pushing cylinder sleeve cavity; and the lower ends of the set of injection push rods are fixed on a push rod pressing ring. The device has the advantages that the structure is simplified; the energy consumption is saved; and the material leakage is avoided, the parison degeneration is prevented, and the efficiency of color changing according requirements is ideal.

Description

technical field [0001] The invention belongs to the technical field of blow molding machinery, and in particular relates to a three-layer diversion material storage type die head device of a blow molding machine. Background technique [0002] The aforementioned blow molding machine is equipment for processing hollow plastic containers, such as filling pharmaceutical and chemical raw materials, oil products, various additives, various solvents, additives, packaging barrels for hazardous chemicals, water tanks, oil tanks, etc. The fuel tank of the vehicle, etc. Since the blow molding mechanism of the blow molding machine belongs to the known technology, for example, please refer to the Chinese patents CN201941151U (automatic hollow molding machine for plastic containers) and CN202162995U (automatic hollow molding machine for large plastic containers), etc., so the applicant No longer. [0003] The aforementioned die head device is an important part of the blow molding machin...

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Problems solved by technology

[0005] According to professional knowledge, the three-layer plastic needs to be guaranteed by the corresponding die head device. For this, please refer to the "three-layer plastic molding machine" recommended by the Chinese patent CN202062631B. Technical effect, but this patent has the following shortcoming: one, due to the need to adopt respectively independent inner, middle and outer three material storage forming die heads respectively adopts three mold cover mechanisms, inner, middle, outer, mold body, i.e. Inner, middle and outer layers of material storage mold body, middle layer forming die opening, outer layer forming die opening and inner layer forming die opening are relatively loose in structure, not only bulky, but also high in manufacturing cost; second, because the three sets of mechanisms all It needs to be equipped with a heating device, that is, heaters are installed outside the inner, middle and outer layer material storage molds, so the energy consumption is large; third, when the material blanks such as the middle layer material blank and the outer layer material The entrance of the middle layer blank and the entrance of the outer layer blank mentioned in the patent will encounter greater resistance when they are transported inwardly to the storage cavity at the injection port, and the friction force is large, so it is difficult for the middle layer blank to fully surround The inner layer blank, and the outer layer blank are also difficult to completely surround the middle layer blank, and there will inevitably be material leakage between layers; Each head has an independent heater, so it is difficult to control the temperature of the billet, which is easy to cause material denaturation, affecting the billet and affecting the quality of the molten billet

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