CN117206830A - A kind of preparation method of copper-coated pad - Google Patents

Abstract

A method for preparing a copper-clad pad, comprising the steps of: s1: preparing a first copper bar, a second copper bar and a nonmetallic filler strip; s2: turning up two sides of the first copper bar to form a first side edge and a second side edge; s3: firstly, filling a nonmetallic filler strip between a first side edge and a second side edge of a first copper bar, and then filling a second copper bar between the first side edge and the second side edge of the first copper bar; s4: inwards folding the first side edge to form a first folded edge, inwards folding the second side edge to form a second folded edge, and respectively covering two edges of the second copper strip by the first folded edge and the second folded edge so as to form a rudiment belt; s5: compacting the embryonic strip so that the nonmetallic filler strip is wrapped in the first copper strip and the second copper strip to form a copper cladding strip; s6: the copper cladding belt is looped into an annular shape with upper and lower surfaces, and then the head and the tail of the copper cladding belt are welded to form the copper cladding pad.

Description

A kind of preparation method of copper-coated pad

Technical field

The invention relates to a method for preparing a copper-coated pad.

Background technique

A metal-clad gasket is a gasket in which a non-metallic filler (such as graphite) is encased in metal in the shape of a ring. For example, CN 201884647 U discloses a metal-coated gasket, which is an annular member composed of an outer metal coating layer and an inner filling layer. The metal coating layer can be made of stainless steel, nickel, titanium, copper, iron, aluminum or lead, any of which can be used. Among stainless steels, 300 series stainless steel is preferred, such as 304, 316, 321, etc. The filling layer is made of any one of graphite, polytetrafluoroethylene, asbestos or ceramics. The metal wrapping layer is composed of an annular metal groove and a baffle. First, the filling layer is placed in the annular metal groove, and then the baffle is pressed against the opening through a pressure device to form a gasket with an integrated structure.

The annular metal groove and the baffle of the metal coating layer of the existing metal-coated pad are both integrated annular parts, and the filling layer is also an integrated annular part. The method used when forming annular metal grooves, annular baffles, and annular filling layers is to punch out ring-shaped parts on the metal plate and the filling plate. The remaining material after stamping becomes waste, which is extremely wasteful.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the existing copper-coated pad preparation methods, the present invention provides a copper-coated pad preparation method, which can greatly save production raw materials.

The technical solution of the present invention to solve the technical problem is: a preparation method of a copper-coated pad, which includes the following steps:

S1: Prepare the first copper strip, the second copper strip and the non-metal filler strip;

S2: Fold both sides of the first copper strip upward to form the first side and the second side;

S3: First fill the non-metallic filler strip between the first side and the second side of the first copper strip, and then fill the second copper strip between the first side and the second side of the first copper strip. between the first side and the second side;

S4: Fold the first side inward to form a first fold, and fold the second side inward to form a second fold. The first fold and the second fold are respectively The two edges of the second copper strip are covered to form a prototype strip;

S5: Press the prototype belt so that the non-metal filler belt is wrapped in the first copper strip and the second copper strip to form a copper-clad strip;

S6: Loop the copper-clad tape into a ring shape with upper and lower surfaces, and then weld the first and last ends of the copper-clad tape to form a copper-clad pad.

Further, the non-metallic filler tape is a graphite tape.

Further, the non-metal filler tape has several layers.

Further, both sides of the second copper strip are respectively offset from the inside of the first side and the second side of the first copper strip.

The beneficial effects of the present invention are that: the first copper bar and the second copper bar are both in strip shape, and the non-metal filler strip is also in strip shape. Therefore, only strip-shaped raw materials are needed during production, and there is no need to obtain raw materials through stamping. , can greatly reduce the generation of waste materials, thus greatly saving production costs.

Description of drawings

Figure 1 is a front view of a copper clad pad.

Figure 2 is a cross-sectional view of the first copper strip.

Figure 3 is a cross-sectional view of the first copper strip after two sides are folded upward to form a first side and a second side.

Figure 4 is a cross-sectional view after filling the non-metal filler tape and the second copper strip.

Figure 5 is a cross-sectional view after the first folding edge and the second folding edge are formed by inward folding.

Implementation

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Figures 1-5, a method for preparing a copper-coated pad includes the following steps:

S1: Refer to Figure 2, prepare the first copper strip 1, the second copper strip 2 and the non-metal filler tape 3;

S2: Referring to Figure 3, fold both sides of the first copper strip 1 upward to form a first side 1-1 and a second side 1-2;

S3: Referring to Figure 4, first fill the non-metal filler strip 3 between the first side 1-1 and the second side 1-2 of the first copper strip, and then fill the second The copper strip 2 is filled between the first side 1-1 and the second side 1-2 of the first copper strip;

S4: Referring to Figure 5, fold the first side 1-1 inward to form a first fold 1-3, and fold the second side 1-2 inward to form a second fold 1- 4. The first folding edge 1-3 and the second folding edge 1-4 cover the two edges of the second copper strip 2 respectively, thereby forming a prototype belt;

S5: Press the prototype belt so that the non-metallic filler belt 3 is wrapped in the first copper strip 1 and the second copper strip 2 to form a copper-clad strip;

S6: Loop the copper-clad tape into a ring shape with upper and lower surfaces, and then weld the first and last ends of the copper-clad tape to form a copper-clad pad. A weld seam 4 will be formed at the welding point, and it is best to polish the weld seam 4. The so-called ring shape with upper and lower surfaces means that when the copper-clad strip is wound into a ring shape, it is not a ring with inner and outer surfaces, but a flat ring with upper and lower surfaces.

The non-metallic filler tape 3 is usually a graphite tape, but of course it can also be other non-metallic fillers such as polytetrafluoroethylene. .

In one embodiment, the non-metallic filler tape 3 has several layers in order to achieve better sealing effect.

In one embodiment, both sides of the second copper strip 2 offset the inside of the first side 1-1 and the second side 1-2 of the first copper strip respectively, so that the non-metal filler strip 3 can be better wrapped.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiment. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (4)

1. A method for preparing a copper-coated pad, which is characterized by comprising the following steps: S1: Prepare the first copper strip, the second copper strip and the non-metal filler strip; S2: Fold both sides of the first copper strip upward to form the first side and the second side; S3: First fill the non-metallic filler strip between the first side and the second side of the first copper strip, and then fill the second copper strip between the first side and the second side of the first copper strip. between the first side and the second side; S4: Fold the first side inward to form a first fold, and fold the second side inward to form a second fold. The first fold and the second fold are respectively The two edges of the second copper strip are covered to form a prototype strip; S5: Press the prototype belt so that the non-metal filler belt is wrapped in the first copper strip and the second copper strip to form a copper-clad strip; S6: Loop the copper-clad tape into a ring shape with upper and lower surfaces, and then weld the first and last ends of the copper-clad tape to form a copper-clad pad. 2. The method for preparing a copper-coated pad according to claim 1, wherein the non-metallic filler tape is a graphite tape. 3. The method for preparing a copper-coated pad according to claim 2, wherein the non-metallic filler tape has several layers. 4. The method for preparing a copper-coated pad according to any one of claims 1 to 3, characterized in that: both sides of the second copper strip are respectively connected with the first side and the second side of the first copper strip. The inner sides of the two sides touch each other.