Method for forming hollow box body provided with built-in component
A molding method and component technology, applied in the field of fuel tank blow molding manufacturing, can solve the problems of not having good visibility in the debugging process, not conducive to the improvement of tooling design freedom, and not conducive to the quality of Huff line molding, so as to improve the molding Quality and product yield, reduction of HC compound emissions, and the effect of satisfying the performance of anti-wave and noise reduction
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Embodiment 1
[0039] A method for forming a hollow box provided with built-in components, said method comprising the following steps:
[0040] see figure 1 , a) Feeding step, the preforming template 3 and the mold half 2 are set on the base 10 through the power unit 9, when the two plasticized parisons start to be unloaded, the preforming template and the mold half move to the parison 1 Below, two pieces of plasticized parisons 1 are respectively fed into the two gaps formed by the preform template 3 and the mold half-mould 2 . see figure 2 , b) The mold half 2 and the preform template 3 are closed; the knife edge of the mold is provided with a temperature adjustment device 11 for switching between cold water and hot water. After the mold half 2 and the preform template 3 are closed, high-pressure blow molding Previously, the temperature regulating device kept the parison warm by switching to hot water, where the parison needs to maintain a higher temperature, mainly to improve the final...
Embodiment 2
[0042] Example 2: The blowing device is set as a divergent blowing head, and the blowing head is set as a porous hollow ball structure, which can realize uniform blowing in all directions and ensure that the parison is evenly attached to the position in all directions during the preforming process. The inner wall of the cavity. After the mold, preform template device and parison are closed, air is blown through the blowing head on the preform template. At the same time, the air holes on the mold also need to open the vacuum suction parison to assist in forming. At the same time, in the subsequent process It is used to absorb the parison to prevent it from falling out of the cavity. This structure is different from the traditional piercing blowing needle blowing. This blowing method pushes the two pieces of parison to the surface of the mold cavity under the action of high-pressure blowing to realize the oil tank The preliminary molding of the upper and lower shells is usuall...
Embodiment 3
[0043] Example 3 : The preform template 2 is also provided with a sealing device, which is used to seal the mold, the parison and the preform template, not only to prevent the leakage of high-pressure blowing air from causing insufficient molding, but also to prevent the parison temperature from being exchanged with the outside heat. Occurrence of the rapid reduction, so as to ensure the realization of parison preforming in this step; the sealing device can be set as a sealing strip 8, and the sealing strip can adopt organic or inorganic materials with certain strength, such as polytetrafluoroethylene or magnesium Aluminum alloy, etc., due to the requirements of thermal conductivity and weight reduction, a better choice is the lightweight material of magnesium aluminum alloy. Extrude the flash parison on the outside of the knife edge during preforming to realize the sealing of the mold, preforming template and parison during preforming, so that no air leakage will occur under...
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