Organic photoconductor drum
View Patent ↗An organic photoconductor (OPC) drum includes a support member formed as a unitary molded body, a pair of mounting members, a pair of rollers, and an OPC belt. The support member includes a plurality of support plates, a plurality of groove-defining U-shaped segments, and first and second sidewalls. Each of the support plates extends in a first direction. Adjacent ones of the support plates are spaced apart from each other in a second direction transverse to the first direction. Each of the U-shaped segments interconnects a corresponding adjacent pair of the support plates. Each of the mounting members is coupled to a respective one of the first and second sidewalls. The rollers flank the support member in the second direction. The OPC belt is trained on an assembly of the support member and the rollers, and is driven by the rollers to move on the support plates.
1. An organic photoconductor (OPC) drum comprising:
a support member formed as a unitary molded body, said support member including
a plurality of support plates, each extending in a first direction and having opposite first and second ends, adjacent ones of said support plates being spaced apart from each other in a second direction transverse to the first direction,
a plurality of groove-defining U-shaped segments, each extending in the first direction, having opposite first and second ends, and interconnecting a corresponding adjacent pair of said support plates, and
first and second sidewalls, said first sidewall being connected to said first end of said support plates and said first end of said U-shaped segments, said second sidewall being connected to said second end of said support plates and said second end of said U-shaped segments;
a pair of mounting members opposite to each other in the first direction, each of said mounting members being coupled to a respective one of said first and second sidewalls;
a pair of rollers flanking said support member in the second direction, each of said rollers extending in the first direction and having opposite ends coupled to said mounting members, respectively; and
an OPC belt trained on an assembly of said support member and said rollers, and driven by said rollers to move on said support plates of said support member;
wherein each of said first and second sidewalls has a base part that extends obliquely and outwardly and that has an outer face, and a plurality of block parts that are disposed on said outer face of said base part at positions corresponding to said U-shaped segments, each of said block parts tapering in a direction away from said support plates and having an inclined face that inclines in a direction opposite to that of said base part.
2. The OPC drum as claimed in claim 1 , wherein said support member is formed from a material selected from the group consisting of a bulk molding compound, a sheet molding compound, and a thermoplastic material.
3. The OPC drum as claimed in claim 1 , wherein said support member is formed from a bulk molding compound, said bulk molding compound comprising 13 to 15 wt % of unsaturated polyester resin, 10 to 13 wt % of a shrinkage-controlling low profile additive, 51 to 55 wt % of a filler, and 19 to 21 wt % of glass fibers.
4. The OPC drum as claimed in claim 3 , wherein said shrinkage-controlling low profile additive contains polystyrene.
5. The OPC drum as claimed in claim 3 , wherein said filler is selected from the group consisting of calcium carbonate and aluminum hydroxide.
6. The OPC drum as claimed in claim 1 , wherein said support member includes four of said support plates and three of said U-shaped segments.
7. An organic photoconductor (OPC) drum comprising:
a support member formed as a unitary molded body, said support member including
a plurality of support plates, each extending in a first direction and having opposite first and second ends, adjacent ones of said support plates being spaced apart from each other in a second direction transverse to the first direction,
a plurality of groove-defining U-shaped segments, each extending in the first direction, having opposite first and second ends, and interconnecting a corresponding adjacent pair of said support plates, and
first and second sidewalls, said first sidewall being connected to said first end of said support plates and said first end of said U-shaped segments, said second sidewall being connected to said second end of said support plates and said second end of said U-shaped segments;
a pair of mounting members opposite to each other in the first direction, each of said mounting members being coupled to a respective one of said first and second sidewalls;
a pair of rollers flanking said support member in the second direction, each of said rollers extending in the first direction and having opposite ends coupled to said mounting members, respectively; and
an OPC belt trained on an assembly of said support member and said rollers, and driven by said rollers to move on said support plates of said support member
wherein said support member is formed from a bulk molding compound, said bulk molding compound comprising 13 to 15 wt % of unsaturated polyester resin, 10 to 13wt % of a shrinkage-controlling low profile additive, 51 to 55 wt % of a filler, and 19 to 21 wt % of glass fibers.
8. The OPC drum as claimed in claim 7 , wherein said shrinkage-controlling low profile additive contains polystyrene.
9. The OPC drum as claimed in claim 7 , wherein said filler is selected from the group consisting of calcium carbonate and aluminum hydroxide.