Sisal Target Block of Dartboard and Its Fabrication Process

Abstract

The present invention relates to a sisal target block of dartboards and its fabrication process, especially to a product and a fabrication process which can lower costs and improve quality of the dartboards. The sisal target block is made mainly through such steps as raw material forming, mold forming, cutting, coating container with colloid, container forming, trimming and surface treatment. In this way, not only a mass production but also a simple fabrication process of the dartboard blocks can be realized, with an improved dartboard quality and an increased economic value.

1 . A sisal target block for making a dartboard, wherein long sisal raw material bound in a bundle is extrusion molded and cut into a sisal block of a predetermined shape, and wherein a preformed container is filled to with the sisal block to form the sisal target block.  
     
     
         2 . The sisal target block of  claim 1 , wherein the sisal block is bounded with the container at the contacting part using a colloid coated on the internal surfaces of the container.  
     
     
         3 . The sisal target block of  claim 1 , wherein the long sisal raw material is placed tightly together along the length direction of the sisal thread with a tape wrapping around.  
     
     
         4 . The sisal target block of  claim 1 , wherein the sisal target block is made using a process comprising: 
 (1) raw material forming: cut the sisal raw material bound in a bundle into the sisal block of a predetermined size;    (2) mold forming: extrusion mold the sisal block in a mold;    (3) coating container with colloid: coat the internal side and bottom surfaces of the preformed container with the colloid;    (4) container forming: fill the container with the mold-formed sisal block by an external force, and sufficiently bond the sisal block with the colloid coated on the internal surfaces of the container to prevent the block from falling off;    (5) trimming: trim the surface of the sisal block in the container to make it flat and tidy;    (6) surface treatment: color the trimmed surfaces of the sisal blocks respectively by distinguishing the target blocks with different scores.    
     
     
         5 . The sisal target block of  claim 4 , wherein the material is formed by extrusion molding arranged long sisal raw material into a long bundle of sisal bars with a hemp packing machine, wrapping the sisal bars with a tape, and cutting the sisal bars into the sisal block of the predetermined size.  
     
     
         6 . The sisal target block of  claim 4 , wherein the colloid used in the container forming step is of a natural drying colloid or a heat drying colloid.