Abstract: A gas extraction method including: providing an injection mold apparatus (100) including a mold cavity (300), a gas vent (490) and a gas vent pin (49), the mold cavity including an end portion of a material injection path (210), the gas vent communicating with the end portion, the gas vent pin being received in the gas vent; injecting molten material into the mold cavity and toward the end portion; venting gas from a gap between the gas vent pin and the gas vent as molten material is injected into the mold cavity; driving the gas vent pin to substantially close the end portion of the material injection path when the mold cavity having been injected with molten material to about 95 percent of a capacity of the mold cavity.

Abstract: A gas extraction method including: providing an injection mold apparatus (100) including a mold cavity (300), a gas vent (490) and a gas vent pin (49), the mold cavity including an end portion of a material injection path (210), the gas vent communicating with the end portion, the gas vent pin being received in the gas vent; injecting molten material into the mold cavity and toward the end portion; venting gas from a gap between the gas vent pin and the gas vent as molten material is injected into the mold cavity; driving the gas vent pin to substantially close the end portion of the material injection path when the mold cavity having been injected with molten material to about 95 percent of a capacity of the mold cavity.

Abstract: A cut structure for a mold apparatus (100), which the cut structure is configured for being connected to a mold cavity (210), includes a first hole (42), a cut punch (48) and a draw pin (49). The first hole is configured to communicate with the mold cavity. The cut punch is movably received in the first hole for cutting a portion of a molded product. The cut punch defines a second hole (486); and the draw pin is movably received in the second hole of the cut punch. The draw pin has a wedge cutout (492) configured for drawing the portion of a molded product from the mold apparatus.

Abstract: A gas extraction structure (40) is used for a mold apparatus (100). The gas extraction structure connects with a mold cavity (300). The mold cavity includes an end portion of a plastic injection path (210). The gas extraction structure includes a gas vent (490), a gas vent pin (49), and a support structure (40). The gas vent communicates with the end portion of the plastic injection path. The gas vent pin received in the gas vent. The support structure is fixed with the gas vent pin and brings the gas vent pin to move in the gas vent.

Abstract: A golf club grip has an inner sleeve and an outer sleeve. The inner sleeve has a first end, a second end, an outer wall and an elongated annular recess. The elongated annular recess is formed in the outer wall near the first end. The outer sleeve is mounted in the elongated annular recess and has a rough external wall. Mounting the outer sleeve in the elongated annular recess can provide enough shock absorbability to prevent hands and arms of players from being injured when hitting a golf ball. The rough external wall of the outer sleeve prevents the golf club from slipping.

Abstract: A golf club grip has an inner sleeve and an outer sleeve. The inner sleeve has a first end, a second end, an outer wall and an elongated annular recess. The elongated annular recess is formed in the outer wall near the first end. The outer sleeve is mounted in the elongated annular recess and has a rough external wall. Mounting the outer sleeve in the elongated annular recess can provide enough shock absorbability to prevent hands and arms of players from being injured when hitting a golf ball. The rough external wall of the outer sleeve prevents the golf club from slipping.