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Introduction of internal car bumper type structure

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Introduction of internal car bumper type structure

Release date:2018-03-02 The author: Click:

The front bumper body injection mold of the automobile adopts the internal parting surface technology, passes through the hot runner, and is controlled by the sequence valve to enter the glue. Both sides of the inverted buckle with a large oblique top set of horizontal inclined top and straight top structure, the mold due to the straight top and inclined roof is very large, oblique top rod and straight top rod using 50-60mm, transverse inclined top rod using 25-35mm, The angle of the top of the large inclined roof is 16 degrees. For the top angle of more than 12 degrees, the guide rod structure must be designed. Therefore, the large inclined roof of this mold has been designed with a guide rod structure. The maximum size of this mold is 2500×1560×1790mm, weighs about 30T, and the mold structure is shown in Figure 22. There are 7 side holes on the outer side of the front bumper, and all molds use fixed mold pin structure. The mold design uses advanced internal parting surface technology. The so-called internal sub-type technology is relative to the external sub-type, usually the general products are in accordance with the maximum projected contour of the product as a fixed mold parting line, this is the external sub-type, the general mold is in accordance with this Typed. The internal type is to hide the parting line on the non-appearance surface of the product (that is, B surface or C surface, and the appearance surface is A surface), and it will not affect the parting line after assembly on the whole vehicle, so it will not affect Exterior. In order to realize this kind of function, in the mold structure, the horizontal inclined roof (or the straight top) is controlled by the track technology to run on the secondary track, so as to ensure the deformation of the plastic parts, and to use this secondary track-changing track technology. The controlled institution is called internal sub-type technology. In automotive injection mold design, internal sub-type technology is designed specifically for car bumpers. However, this technology is more complex than the external sub-type bumper in terms of difficulty and structure, and the technical risk is also higher. The cost of the mold and mold will also be higher than that of the external sub-type bumper, but due to the appearance of appearance, in the high-end car It is widely used.


Bumper mold top bar For automobile bumper plastic parts, there are generally two types of sub-type and internal sub-type. For large area downsides on all sides of car bumpers, external or internal types can be used. The choice of these two types of sub-types depends mainly on the requirements of the end customer's automobile main engine plant on the bumper. Generally, European and American automobiles mostly use internal sub-type technology, and Japanese cars mostly use external sub-types. The two types of sub-models have their own advantages and disadvantages. The external sub-type bumpers need to handle the clamping line and increase the processing procedures. However, the external sub-type bumper has lower mold cost and technical difficulty than the internal sub-type bumper. The internal sub-type bumper adopts the secondary track-changing track control technology to inject the bumper into a perfect one-time shot, thereby ensuring the appearance quality of the bumper and saving the processing cost and processing cost of the plastic parts. But the disadvantage is that the cost of the mold is high and the technical requirements of the mold are high.


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