Molded shoe rands
A variable-thickness climbing shoe rand may be fabricated by digitally scanning a variable-thickness rand prototype, transmitting scan data to a computer numerically controlled mold fabrication device, creating a rand mold with the mold fabrication device, cutting a slab of uncured high-friction rubber to fit within the mold, and curing the slab within the mold to create a variable-thickness climbing shoe rand, which may then be bonded to a climbing shoe upper and finished with little or no grinding.
1. A method for fabricating a variable-thickness climbing shoe rand, comprising:
creating a variable-thickness forefoot rand prototype that increases in thickness from a lateral end to a toe end, then decreases in thickness from the toe end to a medial end, and increases in thickness from a lower edge to the toe end, then decreases in thickness from the toe end to an upper toe edge;
scanning the variable-thickness rand prototype with a digital scanner, the digital scanner creating data for reproduction of the variable-thickness rand prototype;
transmitting the data to a computer numerically controlled mold fabrication device;
creating a rand mold with the mold fabrication device;
cutting a slab of uncured high-friction rubber to fit within the rand mold;
inserting the slab of uncured high-friction rubber into the rand mold;
forming a variable-thickness climbing shoe rand by curing the slab with heat and pressure within the rand mold; and
removing the variable-thickness climbing shoe rand from the mold.
2. A method for fabricating a climbing shoe with a variable-thickness rand, comprising:
creating a variable-thickness forefoot rand prototype that increases in thickness from a lateral end to a toe end, then decreases in thickness from the toe end to a medial end, and increases in thickness from a lower edge to the toe end, then decreases in thickness from the toe end to an upper toe edge;
scanning the variable-thickness rand prototype with a digital scanner, the digital scanner creating data for reproduction of the variable-thickness rand prototype;
transmitting the data to a computer numerically controlled mold fabrication device;
creating a rand mold with the mold fabrication device;
cutting a slab of uncured high-friction rubber to fit within the rand mold;
inserting the slab of uncured high-friction rubber into the rand mold;
forming a variable-thickness climbing shoe rand by curing the slab with heat and pressure within the rand mold; and
bonding the variable-thickness climbing shoe rand to a climbing shoe upper.