Disclosed herein is an iron-type golf club head. The iron-type golf club head comprises a body, having a density of less than 8 grams-per-cubic-centimeter (g/cc). The body comprises a heel portion, a toe portion, a sole portion, a top portion, and a front portion. The body also comprises a rear portion, comprising an insert shelf, adjacent the sole portion and extending from the toe portion to the heel portion, and a retention bar, integrally formed with a portion of the insert shelf and circumferentially closing the portion of the insert shelf to define a first insert channel. The iron-type golf club head also comprises a high-density insert, having a density of greater than 7.5 g/cc, supported by the insert shelf, and retained within the first insert channel by the retention bar.

A golf club head including a striking face, a periphery portion surrounding and extending rearwards from the striking face, a damping element including a front surface and a rear surface, the rear surface of the damping element opposite the front surface of the damping element, wherein the striking face comprises a first portion having a substantially constant thickness, wherein the front surface of the damping element comprises a geometric center, wherein the golf club head includes additional damping structures and materials to achieve desired acoustic characteristics.

A golf club head having a multi-layered striking face is disclosed herein. More specifically, the golf club head in accordance with the present invention has an external frontal face layer, an internal rear face layer, and an intermediary sandwiched face layer juxtaposed between the external frontal face layer and the internal rear face layer. The intermediary sandwiched face layer may generally be made out of a high flexural modulus polymeric material.

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club heady ma include a hollow body portion having a toe portion with a toe portion edge, a heel portion with a heel portion edge, a back portion with a back wall portion, a top portion with a top portion edge, a sole portion with a sole portion edge, and a front portion. A face portion may be coupled to the front portion and include a front surface and a back surface. The body portion includes a face support portion including a composite material and coupled to the back surface of the face portion. The face support portion may include at least one reinforcement portion. Other examples and embodiments may be described and claimed.

A variable face thickness pattern is determined for a golf club head by setting a target value for a first constraint. Parametrization zones are defined and values set for a first parameter and a second parameter for each parametrization zone. Resultant first constraint values are evaluated from simulated impacts against the target first constraint value and the values are changed for the first and second parameters to result in a simulated face thickness pattern. In one aspect, the club head has a maximum coefficient of restitution at a first location of the striking face and a second coefficient of restitution that is no less than 98% of the maximum coefficient of restitution at a second location that is at least 7.5 mm from the first location. In another aspect, the club head has a moment of inertia, Izz, and a mass, mh, satisfying: Izz>mh*9.3 cm.sup.2.

An iron-type golf club head incudes a body, a recessed channel, and a weight assembly. The body includes a striking face, a sole, and a back portion positioned between the sole and the striking face. The striking face includes an upper topline edge and a lower leading edge opposite to the upper topline edge. The recessed channel is formed in the back portion and includes a plurality of dividers. The weight assembly includes a weight at least partially disposed within the recessed channel and configured to engage one of the plurality of dividers in a locked configuration.

Some embodiments include a golf club head. The golf club head includes a front body having a front body front portion with a front body front surface and having a front body rear portion, and includes a rear body having a rear body front portion, a rear body rear portion, and multiple protrusions. The golf club head is configured such that (i) when the front body front surface strikes a golf ball with a first amount of force, the front body deflects toward the rear body with a first amount of deflection, and (ii) when the front body front surface strikes the golf ball with a second amount of force less than the first amount of force, the front body deflects toward the rear body with a second amount of deflection greater than the first amount of deflection. Other embodiments of related club heads and methods are also disclosed.

Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a golf club head may include a body portion having a first body portion piece with a first port, and a second body portion piece removably coupled to the first body portion piece and having a second port. The first body portion piece may be at least partially filled with a polymer material. The golf club head may also include a mass portion having a fastening portion. The first and second ports are configured to be axially aligned. The second port is configured to receive the mass portion to close the second port, and the fastening portion of the mass portion is configured to engage the first port to fasten the second body portion piece to the first body portion piece. Other examples and embodiments may be described and claimed.

Methods of creating golf club components with complex structures that would be difficult, impossible, or cost prohibitive to produce, such as lattice structures, beam structures, and complex surface-based structures, are described herein. In particular, a binder jet machine is used create complex structures to optimize weighting, sound, and performance of golf club heads. The method preferably includes the steps of designing a golf club head component in CAD using optimization software, printing the component from a powdered material, and then removing excess powder from the component via port holes that extend into an external surface of the component and communicate with interior voids within the component.

An iron-type golf club incorporating an aperture extending through the shell on the sole. The location and size of the aperture selectively increase deflection of the face.