Multi-member knitting needles and methods for making the same
Example apparatuses and methods are directed to knitting needles or tools and/or methods of making the same. In some implementations, a method of making a knitting needle includes providing a first member formed of a first material, and securing one or more additional members to an end of the first member with interference press-fit. The additional member(s) may be formed of a second material different from the first material. In some examples, a knitting needle is provided that includes a first member formed of a first material and one or more additional members secured to an end of the first member with interference press-fit. The additional member(s) may be formed of a second material different from the first material.
1 . A method of making a knitting needle, comprising:
providing a first member formed of a non-metallic material; and
securing a second member and a third member to opposite ends of the first member, wherein the second member is a needle tip, the second member and the third member each formed of a metallic material different from the non-metallic material, the second member and the third member each secured to the first member with an interference press-fit of male parts of the first member inserted into respective bores of the second member and the third member, wherein the bores are radially deflected such that a first member outer diameter is mismatched with respect to outer diameters of the second and third members radially overlying the respective male parts at interfaces between the metallic material and the non-metallic material; and
smoothing an outer surface of the knitting needle including the interfaces between the metallic material and the non-metallic material to remove the mismatches.
2 . The method of claim 1 , wherein a joining force between the male part and the bore is configured to resist a pulling force of at least 1.0 kilograms (kg).
3 . The method of claim 2 , wherein an outside diameter of the male part is at least 0.01 millimeters larger than an inside diameter of the bore.
4 . The method of claim 1 , wherein the male part defines a male contact surface extending axially along the male part, the male contact surface in contact with a female contact surface extending axially along one of the bores after the male part is inserted, the male contact surface and the female contact surface having an axial contact length of at least 2.0 millimeters (mm).
5 . The method of claim 1 , wherein smoothing the outer surface includes grinding the first material and the second material with a grinding surface having a grit number greater than 100.
6 . The method of claim 1 , wherein the metallic material includes a stainless-steel material.
7 . A method of making a knitting needle, comprising:
providing a first member formed of a non-metallic material;
securing a needle tip to an end of the first member, the needle tip formed of a metallic material different from the non-metallic material, wherein securing the needle tip to the end of the first member includes inserting a male part of the first member into a bore of the needle tip, wherein inserting the male part into the bore includes providing an interference press-fit of the male part with the bore, wherein the bore of the needle tip is radially deflected such that a first member outer diameter is mismatched with respect to a needle tip outer diameter radially overlying the male part at an interface between the metallic material and the non-metallic material; and
smoothing an outer surface of the knitting needle including the interface between the metallic material and the non-metallic material to remove the mismatch.
8 . The method of claim 7 , wherein an outside diameter of the male part is at least 0.01 millimeters (mm) larger than an inside diameter of the bore.
9 . The method of claim 7 , wherein smoothing the outer surface includes grinding the first material and the second material by applying a grinding surface having a grit number greater than 100.
10 . A knitting needle, comprising:
a first member formed of a non-metallic material; and
a second member and a third member secured to the first member at opposite ends of the first member, wherein the second member is a needle tip, the second member and third member each formed of a metallic material different from the non-metallic material;
wherein at least one of the second member and the third member are secured to the first member with an interference press-fit between a bore and a male part received in the bore, and wherein an outside diameter of the male part is at least 0.01 millimeters larger than an inside diameter of the bore;
wherein the bore is radially deflected such that a first member outer diameter is mismatched with respect to an outer diameter of the second member radially overlying the male part at an interface between the metallic material and the non-metallic material; and
wherein an outer surface of the knitting needle including the interfaces between the metallic material and the non-metallic material is smoothed to remove the mismatches.
11 . The knitting needle of claim 10 , wherein the male part defines a male contact surface extending axially along the male part, the male contact surface in contact with a female contact surface extending axially along the bore, the male contact surface and the female contact surface having an axial contact length of at least 2.0 millimeters (mm).
12 . The knitting needle of claim 10 , further comprising a cable having a first end and a second end, wherein the first end is coupled to one of the second member and the third member, and wherein the second end is coupled to an additional knitting needle.
13 . The knitting needle of claim 10 , wherein the metallic material is a stainless-steel material.
14 . The knitting needle of claim 10 , further comprising a nano coating applied to an outer surface of at least one of the first member, the second member, and the third member.
15 . The method of claim 1 , wherein the radial deflection results from the interference press-fit of the male member with the bore.
16 . The method of claim 1 , wherein the radial deflection results from a tolerance associated with one of the needle tip and the first member.
17 . The method of claim 1 , wherein the third member is one of a second needle tip or a connector member.
18 . The method of claim 7 , wherein the radial deflection results from the interference press-fit of the male member with the bore.
19 . The method of claim 7 , wherein the radial deflection results from a tolerance associated with one of the needle tip and the first member.
20 . The method of claim 7 , wherein the mismatch is removed such that cylindrical surfaces of the first member and the needle tip have an equal diameter.