US5551862A | 寵物協尋網
![US5551862A](https://i.imgur.com/voy7JL0.jpg)
1996-09-03.Applicationgranted.1996-09-03.PublicationofUS5551862A.2014-06-06...3isaperspectiveviewoftheblowmoldclampinanopenposition.
![US5551862A](https://i.imgur.com/voy7JL0.jpg)
The present invention relates to blow molding apparatus used to mold hollow bodies from plastic material by blow molding, and especially to an apparatus for forming hollow bodies within two molds clamped in a back-to-back relationship.
In blow molding, a parison of plastic material is first extruded between two mold halves or sections, each having a back surface and a front surface, with a segment of the desired mold cavity cut into the surface of each section front surface. The opposed surfaces of the mold sections are positioned in parallel planes.
After extrusion of the parison, the mold segments are clamped together so that the front surfaces of the mold sections are held against each other to form the complete mold cavity, and air is injected into the interior of the parison, e.g., with a blowing needle, pin or other apparatus, which penetrates the parison...
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