Process for injection molding of hollow product having irregular shape with plastic material instead of metal material

A process of injection molding of a hollow product having an irregular shape with plastic material instead of metal material, comprising steps of:

• molding an upper half part of the hollow product and a lower half part of the hollow product with a same mold, the mold comprising a first mold half and a second mold half, a convex structure and a concave structure being respectively disposed in matching surfaces of the upper half part and the lower half part, the upper half part and the lower half part being combined with each other via the convex structure and the concave structure, two grooves being respectively defined in two opposite outer sides of the combination of the upper half part with the lower half part;
• opening the mold, after the mold is opened, the upper half part being left with the first mold half, the lower half part being left with the second mold half;
• moving the second mold half or rotating the second mold half 180 degrees to make the lower half part on the second mold half align with the upper half part on the first mold half;
• injecting plastic material into the grooves which are respectively defined in two opposite outer sides of the combination of the upper half part with the lower half part, thereby forming two connecting strips therein to connect the upper half part with the lower half part;
• and
• having the mold cooled, opening the mold and having the hollow product pushed out, thereby obtaining the hollow product.