Abstract: In a method of injection molding a tie that includes an abutment wall surface having at least one tooth inside a locking head facing a pawl, a movable core that defines at least a portion of a surface of the abutment wall that is on the opposite side of the abutment wall from the portion of the abutment surface that includes the at least one abutment surface tooth is moved to thereby enable the abutment wall to flex in a direction away from the pawl into a space vacated by movement of the core so that the tie can be removed from the mold without significantly damaging the at least one abutment surface tooth.

Abstract: A tie including a tongue and a locking head having a pawl that is hinged at one side of an opening in the locking head across the opening from an abutment surface for locking engagement with a first set of ratchet teeth on one side of the tongue when the tongue has been inserted through the opening, and also having teeth on the abutment surface for locking engagement with a second set of ratchet teeth on the other side of the tongue when the tongue has been so inserted, is formed by injection molding. An artifact line is formed at a parting line between the mold parts while the plastic material solidifies in the mold cavity.

Abstract: In a tie including an elongated tongue with a locking head at one end of the tongue, a tip at the other end of the tongue, a first set of ratchet teeth extending along one broad side of the tongue and a second set of ratchet teeth extending along the other broad side of the tongue, wherein the locking head has sides defining an opening for receiving the tip of the tongue, a movable pawl that is hinged at one side of the opening and an abutment surface that is across the opening from the pawl, wherein the pawl has pawl teeth disposed for engaging the first set of ratchet teeth, and wherein stationary teeth are disposed on the abutment surface for engaging the second set of ratchet teeth, the stationary teeth on the abutment surface have a greater lateral extension with respect to the direction of insertion of the tongue through the opening than do the pawl teeth and the second set of ratchet teeth have a greater lateral extension with respect to the direction of insertion than do the first set of ratchet teeth

Abstract: A method of injection molding a tie that includes an abutment wall surface having at least one tooth facing a pawl that has at least one tooth inside a locking head utilizes a core that defines at least a portion of the abutment surface tooth and at least a portion of a surface of the pawl that includes the at least one pawl tooth. The core is movable in relation to a first other mold part and is separated from a second other mold part not sooner than the first other mold part is separated from the second other mold part to thereby enable (a) the pawl to flex into a space vacated by movement of the first other mold part and (b) the abutment wall to flex into a space also vacated by movement of the first other mold part during separation of the first other mold part from the second other mold part so that the tie can be removed from the mold without significantly damaging either the at least one pawl tooth or the at least one abutment surface tooth.

Abstract: Balanced injection molding in a multi-cavity mold of a plurality of ties having a uniform maximum thickness between opposite broad sides of the tongue of the tie is accomplished by providing mold pieces in which the relative dimensions of projections for forming ratchet teeth on the tongue of the ties in different mold cavities are non-uniform such that when plastic material is injected into the mold cavities, the injected plastic material flows through the different mold cavities at respective flow rates that cause the mold cavities to be completely filled approximately simultaneously with the injected plastic material. In making the mold pieces, the dimensions of the projections initially are larger than required for forming ratchet teeth of a preferred dimension.

Abstract: In a method of injection molding a tie that includes an abutment wall surface having at least one tooth inside a locking head facing a pawl, a retractable core that defines at least a portion of the abutment surface that includes the at least one abutment surface tooth is retracted so that the tie can be removed from the mold without significantly damaging the at least one abutment surface tooth. The core is disposed for retraction in a direction inclined toward the pawl at an acute angle away from the direction of insertion of the tongue of the tie into the locking head.

Abstract: In a method of injection molding a tie that includes an abutment wall surface having at least one tooth inside a locking head facing a pawl, a first mold part defines a portion of the abutment surface that includes the at least one abutment surface tooth and a second mold part defines at least a portion of a surface of the abutment wall that is on the opposite side of the abutment wall from the portion of the abutment surface that includes the at least one abutment surface tooth. The first mold part is separated from the second mold part while retaining the abutment wall in the first mold part to separate the second mold part from the opposite side of the abutment wall to thereby enable the abutment wall to flex in a direction away from the pawl into a space vacated by separation of the second mold part from the opposite side of the abutment wall so that the tie can be removed from the mold without significantly damaging the at least one abutment surface tooth.

Abstract: An injection molded elongated article having a head and a strap, such as a cable tie, is ejected from between separated first and second mold parts by imparting a forceful gaseous stream between the mold parts to thereby peel a first portion of the strap from the first mold part after a second portion of the strap adjacent the head of the article was peeled from the first mold part by ejecting the head of the article from the first mold part while retaining the first portion of the strap in the first mold part. In a multi-cavity injection molding apparatus, a pair of nozzles are contained within each of a plurality of components through which compressed air flows into the region between the mold parts; and the nozzles are disposed closely adjacent the heads of a pair of cable ties for imparting a pair of gaseous streams from the component for peeling the first portions of the straps from the first mold part.

Abstract: In a method of injection molding a tie that includes an abutment wall surface having at least one tooth inside a locking head facing a pawl is formed in a mold that defines a tie in which the abutment wall includes at least one bulge adjacent each of opposite ends of the abutment wall for holding the abutment wall in the respective mold parts when the mold parts are first separated, with the at least one bulge adjacent one end of the abutment wall being defined by a first mold part and the at least one bulge adjacent the opposite end of the abutment wall being defined by a second mold part. As the first and second mold parts are being separated, the bulges initially hold the abutment wall in the respective first and second mold parts and thereby stretch and reduce the thickness of the abutment wall so that the tie can be removed from the mold without significantly damaging the at least one abutment surface tooth.

Abstract: In a tie including an elongated tongue and a locking head having a movable pawl that is hinged at one side of an opening in the locking head across the opening from an abutment surface for, locking engagement with a first set of ratchet teeth on one broad side of the tongue when the tip of the tongue has been inserted through the opening and teeth on the abutment surface for locking engagement with a second set of ratchet teeth on the other broad side of the tongue when the tip of the tongue has been inserted through the opening, locking engagement is enhanced by the locking surface of at least one abutment surface tooth extending toward the apex of such tooth at an angle inclined toward the direction of insertion for locking engagement with a tooth of the second set of ratchet teeth; and by the locking surface of at least one of the second set of ratchet teeth extending toward the apex of such tooth at an angle inclined away from the direction of insertion for locking engagement with an abutment surface toot

Abstract: In a tie including an elongated tongue and a locking head having a movable pawl that is hinged at one side of an opening in the locking head across the opening from an abutment surface for locking engagement with a first set of ratchet teeth on one broad side of the tongue when the tip of the tongue has been inserted through the opening and teeth on the abutment surface for locking engagement with a second set of ratchet teeth on the other broad side of the tongue when the tip of the tongue has been inserted through the opening, and in which the side of the pawl including the pawl teeth converges toward the opposite side of the pawl in the direction of insertion, locking engagement is enhanced by the locking surface of at least one pawl tooth extending toward the apex of such tooth at an angle inclined toward the direction of insertion for locking engagement with a tooth of the first set of ratchet teeth; and by the locking surface of at least one of the first set of ratchet teeth extending toward the apex of