JPS6092443A - Heat fixing roll for electrophotographic copying machine - Google Patents

Abstract

PURPOSE:To abolish a pressure-releasing mechanism, to make a heat fixing roll lighter in weight and to reduce the time for heating up by using an Al-Cu alloy for constituting the backing metal of a fixing roll consisting of the backing metal to be covered with a rubber elastic layer of a normally pressurized type heat fixing device of a copying machine. CONSTITUTION:The backing metal to be coated with a rubber elastic layer of a heat fixing roll is formed of an extended Al alloy material contg., for example, about 3-7% Cu and about 0.1-1.5% Mn and contg. >= kind among about 0.01- 0.12% Ti, about 0.05-0.5% V and about 0.05-0.5% Zr. The A alloy material is further improved in strength by subjecting the material to an age hardening treatment for about >=10hr at about 120-240 deg.C after the solution heat treatment at about 400-540 deg.C. Said backing metal is allowed to stand for about >=10hr at about 150-200 deg.C in the stage in which the heat-resistant rubber elastic layer having an antioffset layer consisting of silicone rubber, etc. is coated thereon. The age hardening arises therefore of itself in the above-described backing metal in the process for production even if said metal is not subjected to the age hardening treatment after the soln. heat treatment.

Description

Detailed Description of the Invention Technical Field The present invention relates to a heating fixing roll (heat roll) that is constantly pressurized (except for clearing a jam 1N) in a heating roll type fixing device of an electrophotographic copying machine. Jru.

Prior Art Conventionally, aluminum-magnesium (Am-IVI) alloys, such as A 5056-1-134 and A 5052-, were used as heat rolls in electrophotographic copying machines.
Ll 32'R is used. Kagaru A3000?
R series alloy is non-heat treated alloy C 130~170℃ after cold working
The strength is improved through stabilization treatment, which involves heating.

lKodapi 1~ When using it as a roll, almost
150"-23 (1℃ used at 1℃, in actual use, the annealing state is higher than that of stabilization treatment, and it is strong 1.
The reciprocity decreased significantly, and A 5056, △5052-(1(
It will be about the same level as J Niji) material. Shii Koga--
) In a type of device that does not release pressure, bending of the roll occurs due to a decrease in strength, and defects such as uneven coating, wrinkles, and non-fixing appear.

To date, the following I! measures have been taken to address such defects: i! A proposal has been made.

1)” Bee 11. 2) Increase the thickness of the roll to a large extent to withstand stress. 3) Use a metal other than aluminum alloy.

However, 1) makes the structure of the device complicated, leading to an increase in manufacturing costs, 2) increases the weight and increases the waiting time before starting work, and 3) deteriorates thermal conductivity. Each of these causes different problems than those mentioned above.

Purpose This invention solves the problems described in 1-1 of the conventional apparatus, and also eliminates the pressure release mechanism to simplify the structure, which is a trend in copying machines in the future. The purpose of this is to reduce the wall thickness of one call by the lζth of the shortening of the steel sheet, and to cope with the decrease in mechanical strength due to this.

111 The structure of the present invention is as follows: 111 A heat-resistant rubber elastic layer is formed on the surface of the support metal roll that is heated to a high temperature in a constant-heating type heat fixing device of an electrophotographic copying machine to prevent it from hitting. A fuser roll consisting of a layer coated with a support metal roll whose material is Al-C.
A heat fixing roll for an electrophotographic copying machine, characterized in that it is made of a U-based aluminum alloy. ]2) The support metal is CI+3 to 7%, MnO, 1 to 1
．． Contains 5%, contains 7) Song 1-i 0. O1～
0.2%, Vo, 05-0.5%, 7 r O, 05
It is a wrought aluminum alloy material containing at least one or two or more of ~0.5%, (3) the supporting metal is Cu 3-7%, Mg 003-2
%, to Si0.2-1,! i%, and in addition to this, Ni
O, 5-2.5%, l"i 0.01-0.2%, ■
0.05-0.5%, Z l' 0.0! i・-0,5
4) The support metal is Ou 3-7%, Mll O, 1-1.
．． 5%, M (10,3-2%, 3'i 0.2-1.5
%, and in addition i' i 0.01 to 0.2%,
VO, 05-0.5%, ZrO, 05-0.5%
The heat fixing roll for an electrophotographic copying machine is an aluminum alloy wrought material containing at least one or more of the above.

This invention meets the various performances required for a heat roll, namely: ■ Good heat resistance (no bending during use at high temperatures), ■ Good thermal conductivity, and ■ Low coefficient of thermal expansion. It satisfies various conditions such as being small, e) having good machinability, and (i) having excellent adhesion to silicone rubber.

In order to achieve the above objectives, alloy components are added respectively. That is, in the Al-Cu-based aluminum alloy of this invention -r
, cu, Mll, MQ, and si are components effective for improving strength, and Mn, Ti, V, Zr, and Ni are components C that are effective for improving heat resistance properties.Cu, Mn, zr
, V, Ni, and sl are components that reduce the thermal IIJ expansion coefficient. Further, Ti and Zr make the surface roughness after cutting finer and improve the adhesion with silicone rubber. The alloy according to the present invention has a history of WOO~, and after solution treatment (quenching) at 540°C, it is subjected to age hardening treatment at 120 to 240°C for 10 hours or more.
It is possible to significantly improve the strength by increasing the strength.

In this process of coating the support metal with a heat-resistant rubber elastic layer that covers the off-cera 1 to prevention layer 41 such as silicone rubber, the temperature is 150 to 200°C in the vulcanization process to stabilize the rubber object 14.
Because it is left at a temperature of 10 hours or more, it is not necessary to carry out age hardening treatment immediately after the solution treatment. In addition, in the actual operating temperature range (150 to 220°C), solution treatment J! I
”/nA I will be annealed because it will never exceed polish!1
This temperature is 150~220℃ [,■＋
, +J effect is within the range of 11'Ji, so even though the strength may decrease during use, the J of conventional roll metal
, the sea urchin never deteriorates.

Hereinafter, this invention will be specifically explained with reference to examples.
8.

Examples Alloy No. 1 (conventional material; A A
505f3) and the roll of this invention alloy N0
A fixing roll (DO=40am1L-400mm) as shown in FIG.
) and conducted a high-temperature surface test at 190°C. The results are shown in the graph in Figure 2 (fixing roll heating time)
It was shown by The amount of bending in the table is 1 at 190℃ above.
The chain after 120 hours is shown in Figure 1-.

The amount of bending of the fixing roll is the difference between the initial roll outer diameter (Do) and the roll outer diameter (D) after S1 heating, and the number of bends in the table is shown in Figure 2. is D-Do/2.

As is clear from the table above and FIG. 2, the bending length L6 of the fixing roll using Alloy 1 of the present invention is significantly smaller than that of conventional alloys. Kui nail.

Effect Song Dynasty (1) 1 of this invention. I'l"°The fuser roll of the self-copying machine is maintained at a high level of strength due to A's anti-protection + l-h4 coating treatment and the use of an 11.1% alloy. ..

(2) The fixing roll of the present invention hardly bends when used at high temperatures.

Therefore, the fixing tool of the present invention can withstand long-term use.

]3) In addition, this invention is not limited to heat rolls, but C
It is effective as a support roll for an elastic material such as rubber (for example, fluororubber, fluorinated silicone, etc.) used in an i-temperature state.

[Brief explanation of drawings]

Fig. 1 is a front view of the fixing target used in the test, and Fig. 2 shows the roll deflection due to the heating time obtained in the high-temperature surface facing test of the fixing roll made of the alloy No. 1 of this invention and the conventional alloy. It is a graph showing changes in acid. Special Feature 9 Applicant Rini Co., Ltd.] - Sumitomo Light Metal Industries Co., Ltd. Agent Patent Attorney Hide Komatsu Agent Patent Attorney Hiroshi Asahi Proceedings Netl) Positive Award - (Voluntary) December 1981 1611 Commissioner of the Japan Patent Office Wakasugi Kazuo-dono 3, relationship with the amendment 4'1 Special benefit application Person's name (67
4) Ichinoko Co., Ltd. - (1yo'b x 1 person) 4.
Agent 〒107 (Fli talk! +86-8854) 5,
Attachment 1] of the amendment order (self-defense) 6. Details of the amendment 1) In 1, detailed explanation column 7, contents of supplement i1- (1) Mei $111 t! ! Page 2, lines 15-16 a)
[Sim 11. 'i (7) WE Excludes exclusion' is corrected to 'Includes release method only in case of jam.' [2] Give the person the thickness of 1 on page 3, lines 18-19.
is corrected as [increase wall thickness]. (3) Correct the 'gi machine opening time at the start of work [waiting time at the start of copying]' in the 3rd line of page 4.

Claims (1)

[Scope of Claims] Middle: A fixing roll in a constantly pressurized heat fixing device of an electrophotographic copying machine, in which the surface of a supporting metal roll heated at high humidity is coated with a heat-resistant rubber elastic layer having an off-hit prevention layer. The heating ankle roll for an electrophotographic copying machine is characterized in that the support metal roll 1 is made of a Δ+-CU-based aluminum aluminum alloy. (2) The supporting metal is C (13-7%, Mllo, 1-1
．． Contains 5%, and in addition -riO, 01 to 0.2%,
■0.05~0. ! i%, Zr 0.05-0.5%
The heating constant volume roll for an electrophotographic copying machine according to claim (1), which is an aluminum alloy wrought material containing at least one or more of the following. (3) Supporting metal is Cu3-7%, Mg003-2%
, containing 2-1.5% of SiO, and containing 5% of NiO.
~2.5%, T i O, 01~0.2%, Vo, 05
The electrophotographic copying machine according to claim (1), which is an aluminum alloy wrought material containing at least one or two or more of the following: heating fixing roll. U) Support metal CI+3~7%, 1yln 0.1~
1.5%, MqO, 3-2%, SiO, 2-1.5%
In addition, Ti 0.01-0.2%, Vo,
The electrophotographic copy according to claim (1), which is an aluminum alloy wrought material containing at least one (I) or two or more of Z r 0.05 to 0.5% and Z r 0.05 to The machine's heating fixing roll.