Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for manufacturing resin shaft member, mold, and roller shaft

A technology for molding resins and molds, used in household components, shafts and bearings, shafts, etc., can solve problems such as affecting the accuracy of rubber surfaces, and achieve the effect of improving productivity and quality, good function, and high rigidity

Inactive Publication Date: 2014-10-15
CANON KK
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even a step or flash at the parting line affects the rubber surface accuracy after the rubber press fit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for manufacturing resin shaft member, mold, and roller shaft
  • Method for manufacturing resin shaft member, mold, and roller shaft
  • Method for manufacturing resin shaft member, mold, and roller shaft

Examples

Experimental program
Comparison scheme
Effect test

example 1-4

[0087] Table 1 shows the use of molds according to the present invention ( image 3 mold shown) as a result of molding.

[0088] Table 1

[0089]

current technology

Example 1

Example 2

Example 3

Example 4

Resin material

HIPS

HIPS

ABS

PC

PC+ABS

Shaft diameter (mm)

φ8

φ8

φ8

φ8

φ8

Shaft length (mm)

250

250

250

250

250

Diameter of roll joint (mm)

φ10

φ10

φ10

φ10

φ10

Number of roll joints

5

5

5

5

5

number of cavities

1

6

6

6

6

Molding cycle (sec)

50

25

25

25

25

[0090] Roller straightness (mm)

0.38

0.1

0.11

0.11

0.08

Roller roundness (μm)

58

24

19

25

22

Radial runout of roller (mm)

0.3

0.06

0.06

0.05

0.05

PL step on shaft (μm)

0.05

0.05

0.05

0.05

0.0...

example 5-9

[0097] Table 2 shows the use of molds according to the present invention ( image 3 mold shown) as a result of molding.

[0098] Table 2

[0099]

[0100]

[0101] In Table 2, all types of resin materials in Examples 5-9 are different. To increase the rigidity of the shaft elements, all resin materials are filled with glass reinforcing fillers.

[0102] As a result of molding each resin material with the mold and molding method of each example of the present invention, the resin materials reinforced with various glass fillers had shortened molding cycles compared with the resin materials without glass fibers shown in Table 1 And improved part accuracy.

[0103] Especially in Example 6, in all aspects of the straightness of the shaft element, the roundness of the roll joint, the radial runout of the roll, and the step of the roll joint, the conventional Parts of the same quality.

example 10-14

[0105] Table 3 shows the use of molds according to the present invention ( image 3 mold shown) as a result of foam molding.

[0106] table 3

[0107]

[0108] Table 3 shows the results of foam molding by mixing foaming agents in various resin materials and using the mold and molding method according to the present invention. For the method of injecting and filling foaming materials, nitrogen gas is introduced into the plasticizing cylinder of the injection molding device under high pressure and mixed with the resin in a high-temperature molten state in the cylinder, and the final mixture is injected and filled into the mold.

[0109] In all cases, compared to the results shown in Tables 1, 2, the molding cycle was shortened and part precision was improved.

[0110] In all cases, the same quality as conventional parts obtained by joining rollers to metal shafts was obtained.

[0111] This result demonstrates that conventional metal parts can be replaced with resin parts,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A mold used to mold a resin roller shaft including a shaft portion and a roller joint portion configured to join a roller includes a plurality of cavities of different shapes for molding a roller joint portion. At least one of the plurality of cavities includes a space portion surrounded by a parting-free surface formed by an insert. The insert is larger in inner diameter than the shaft portion, and is movable by an ejector in the opening / closing direction of the mold.

Description

technical field [0001] The present invention relates to a manufacturing method, a molding die, and a roll shaft for manufacturing a resin shaft member by injecting a resin material into a mold. Background technique [0002] Typically, the rollers used to transport paper in copiers or printers are made by press-fitting and joining rubber rollers to metal shafts. A resin shaft is used at the portion of the shaft where low rigidity is required. [0003] Shapes such as keyways can be added to the metal shaft by subsequent machining of the end face. Plating can be applied as an anti-rust measure for post-processing parts. [0004] Since it is difficult to manufacture cylindrical round shafts, resin shafts need to have a ribbed structure in order to ensure shaft accuracy and prevent sink marks, etc. When the rubber is press-fitted and joined to the rib, the shape accuracy of the rubber is lowered and the surface needs to be polished. [0005] In addition, the mold used to form...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14B29C45/32B65H27/00
CPCB65H2402/80B65H27/00B29C45/14B29C45/32B29C44/04B29C44/08B29C45/0025B29C45/14065B29C45/14598B29C45/1615B29C2045/0037B29C2045/14139B29L2031/75B29C39/146F16C2220/04
Inventor 新井隆
Owner CANON KK