Mold core assembly and sliding element

Abstract

The prevent invention provides a mold core assembly and a slidable element. The mold core assembly is used to form a partial shape of the sliding element applied to a zipper head assembly structure. The mold core assembly includes a first mold core structure and a second mold core structure. The first mold core structure has two first lateral structure bodies and a first middle structure body disposed between the two first lateral structure bodies. The first middle structure body has two first extending portions. The second mold core structure has two second lateral structure bodies and a second middle structure body disposed between the two second lateral structure bodies. The second middle structure body has two second extending portions corresponding to each other. Each first extending portion has a nonuniform thickness, and each second extending portion has a nonuniform thickness.

What is claimed is: 
     
         1 . A mold core assembly for forming a partial shape of a sliding element of a zipper head assembly structure, the sliding element having a base portion, two lateral wall portions, and a seat portion, the two lateral wall portions respectively upwardly extended from two opposite lateral sides of the base portion, the two lateral wall portions corresponding to each other and connected to a front side of the base portion, the seat portion disposed on the base portion and connected to a back side of the base portion, the seat portion having a main body disposed on the base portion and connected to the back side of the base portion, two strip convex ribs respectively disposed on two opposite sides of the main body, and two concave spaces respectively connected to the two strip convex ribs and respectively partially surrounding the two strip convex ribs, characterized in that the mold core assembly comprises:
 a first mold core structure having a first base body, two first lateral structure bodies extended from the first base body and opposite to each other, and a first middle structure body extended from the first base body and disposed between the two first lateral structure bodies, wherein the first middle structure body has two first extending portions opposite to each other, and each first extending portion has a first basis portion and two first thickening portions inwardly projected from the first basis portion; and   a second mold core structure having a second base body, two second lateral structure bodies extended from the second base body and opposite to each other, and a second middle structure body extended from the second base body and disposed between the two second lateral structure bodies, wherein the second middle structure body has two second extending portions opposite to each other, and each second extending portion has a second basis portion and two second thickening portions inwardly projected from the second basis portion;   wherein the two first extending portions of the first middle structure body are respectively connected to the two second extending portions of the second middle structure body, and a partial shape of the seat portion is formed by matching the two first extending portions of the first middle structure body of the first mold core structure and the two second extending portions of the second middle structure body of the second mold core structure;   wherein the two first thickening portions of one of the two first extending portions respectively facing the two first thickening portions of another one of the two first extending portions, the first basis portion has a first basis thickness, the first thickening portion has a first thickening thickness, and the first thickening thickness of the first thickening portion is larger than the first basis thickness of the first basis portion;   wherein the two second thickening portions of one of the two second extending portions respectively facing the two second thickening portions of another one of the two second extending portions, the second basis portion has a second basis thickness, the second thickening portion has a second thickening thickness, and the second thickening thickness of the second thickening portion is larger than the second basis thickness of the second basis portion.   
     
     
         2 . The mold core assembly of  claim 1 , wherein the first middle structure body has a first major receiving space formed between the two first extending portions, each first extending portion has a first minor receiving space formed between the two corresponding first thickening portions, and the first major receiving space is communicated between the two first minor receiving spaces of the two first extending portions, wherein the second middle structure body has a second major receiving space formed between the two second extending portions, each second extending portion has a second minor receiving space formed between the two corresponding second thickening portions, the second major receiving space is communicated with the first major receiving space and communicated between the two second minor receiving spaces of the two second extending portions, and the two second minor receiving spaces of the two second extending portions are respectively communicated with the two first minor receiving spaces of the two first extending portions. 
     
     
         3 . The mold core assembly of  claim 2 , wherein the main body of the seat portion corresponds to the first major receiving space and the second major receiving space, and the shape of the main body of the seat portion is formed by matching the first major receiving space and the second major receiving space. 
     
     
         4 . The mold core assembly of  claim 2 , wherein each strip convex rib corresponds to the first minor receiving space of the corresponding first extending portion and the second minor receiving space of the corresponding second extending portion, and the shape of each strip convex rib is formed by matching the first minor receiving space of the corresponding first extending portion and the second minor receiving space of the corresponding second extending portion. 
     
     
         5 . The mold core assembly of  claim 2 , wherein each concave space corresponds to the two first thickening portions of the corresponding first extending portion and the two second thickening portions of the corresponding second extending portion, and the shape of each concave space is formed by matching the two first thickening portions of the corresponding first extending portion and the two second thickening portions of the corresponding second extending portion. 
     
     
         6 . A mold core assembly for forming a partial shape of a sliding element of a zipper head assembly structure, the sliding element having a base portion, two lateral wall portions, and a seat portion, the two lateral wall portions respectively upwardly extended from two opposite lateral sides of the base portion, the two lateral wall portions corresponding to each other and connected to a front side of the base portion, and the seat portion disposed on the base portion and connected to a back side of the base portion, characterized in that the mold core assembly comprises:
 a first mold core structure having a first base body, two first lateral structure bodies extended from the first base body and opposite to each other, and a first middle structure body extended from the first base body and disposed between the two first lateral structure bodies, wherein the first middle structure body has two first extending portions opposite to each other, and each first extending portion has a nonuniform thickness; and   a second mold core structure having a second base body, two second lateral structure bodies extended from the second base body and opposite to each other, and a second middle structure body extended from the second base body and disposed between the two second lateral structure bodies, wherein the second middle structure body has two second extending portions opposite to each other, and each second extending portion has a nonuniform thickness;   wherein the two first extending portions of the first middle structure body are respectively connected to the two second extending portions of the second middle structure body, and a partial shape of the seat portion is formed by matching the two first extending portions of the first middle structure body of the first mold core structure and the two second extending portions of the second middle structure body of the second mold core structure.   
     
     
         7 . The mold core assembly of  claim 6 , wherein each first extending portion has a first basis portion and at least one first thickening portion inwardly projected from the first basis portion, and each second extending portion has a second basis portion and at least one second thickening portion inwardly projected from the second basis portion, wherein the at least one first thickening portion of one of the two first extending portions faces the at least one first thickening portion of another one of the two first extending portions, the first basis portion has a first basis thickness, the first thickening portion has a first thickening thickness, and the first thickening thickness of the first thickening portion is larger than the first basis thickness of the first basis portion, wherein the at least one second thickening portion of one of the two second extending portions faces the at least one second thickening portion of another one of the two second extending portions, the second basis portion has a second basis thickness, the second thickening portion has a second thickening thickness, and the second thickening thickness of the second thickening portion is larger than the second basis thickness of the second basis portion. 
     
     
         8 . The mold core assembly of  claim 6 , wherein each first extending portion has a first basis portion and at least one first thickening portion inwardly projected from the first basis portion, and each second extending portion has a second basis portion and at least one second thickening portion inwardly projected from the second basis portion, wherein the two first thickening portions of one of the two first extending portions respectively facing the two first thickening portions of another one of the two first extending portions, the first basis portion has a first basis thickness, the first thickening portion has a first thickening thickness, and the first thickening thickness of the first thickening portion is larger than the first basis thickness of the first basis portion, wherein the two second thickening portions of one of the two second extending portions respectively facing the two second thickening portions of another one of the two second extending portions, the second basis portion has a second basis thickness, the second thickening portion has a second thickening thickness, and the second thickening thickness of the second thickening portion is larger than the second basis thickness of the second basis portion. 
     
     
         9 . A sliding element, comprising:
 a base portion having a front side and a back side;   two lateral wall portions respectively upwardly extended from two opposite lateral sides of the base portion, wherein the two lateral wall portions correspond to each other and are connected to the front side of the base portion; and   a seat portion disposed on the base portion and connected to the back side of the base portion, wherein a partial shape of the base portion is formed by matching the first middle structure body and the second middle structure body of the mold core assembly of  claim 6 ;   wherein the seat portion has a main body disposed on the base portion and connected to the back side of the base portion, two strip convex ribs respectively disposed on two opposite sides of the main body, and two concave spaces respectively connected to the two strip convex ribs.   
     
     
         10 . The sliding element of  claim 9 , wherein the base portion has a micro protrusion projected from an inner surface thereof, the micro protrusion is connected to the main body of the seat portion and partially surrounding the main body of the seat portion, and the two concave spaces of the seat portion and the micro protrusion of the base portion are formed into U shapes.