TWI290596B - Antirust overlay film forming method of PC steel strand - Google Patents

Abstract

The objective of present invention is to provide an antirust overlay film forming method of PC (prestressed concrete) steel strand of steel material subject to tension of prestressed concrete construction method used for architectural and constructional structure, which will not damage the flexibility and adhesive strength to the concrete of the PC steel strand, can protect the surface from damage, and forms thick double overlay film easily. The antirust overlay film forming method of PC steel strand comprises the following steps: forming a plating overlay film on the outer peripheral surface of the raw wire, performing wire drawing treatment on the raw wire formed with plating overlay film to form the raw wire for the, twisting a plurality of the raw wire for the strand together to form the PC steel strand comprising a core wire and side wires, temporarily untwisting the PC steel strand and performing shot blasting on the core wire and the side wires, forming resin overlay films on the outer peripheral surface of the shot blasted core wire and side wires, and once again twisting the wires together after the resin overlay is cooled down.

Description

1290596

V. DESCRIPTION OF THE INVENTION (1) [Technical method of the invention] The present invention relates to a method of forming a prestressed concrete. [Prior Art] As the aluminum-zinc film layer formed in the double-layered rust-proof layer of the steel strand, the aluminum-thick film may be formed as in the case of the double-layered rust-proof layer, but the ring may have poor adhesion. [Description of the Invention] In view of the above-mentioned problem, the adhesion of the rust-preventing layer to the PC is good. In order to solve the above method, the PC steel strand which is originally used for the stranding of the plating film is blasted. Processing the surface of the resin on the surface of the surface] The anti-rust coating of the PC steel strand of a tensile steel used as a building structure and geotechnical method ===The core wire and the side line are formed to prevent the steel edge from becoming the next day. For example, there is a patent document, Japanese special Kaiping 11- Maoyue. The content is on the outer peripheral surface of the core wire and the side wire, and a resin coating is formed on the upper surface of the coating layer: in the method of forming the double-layered rustproof layer, the bran is used. The steel strand of the film layer is temporarily untwisted to form an oil-two-tree problem of the Yan-y-oxygen resin coating layer. Such as

In this method, the problem of the steel strand, the feed line of the feed line, the plurality of the PC's in the film, the rust-proof coating of the resin film pair of the invention, the outer peripheral surface of the PC of the present invention The wire drawing process twists the strand together to temporarily perform the shot blasting of the resin in that a core green forming method for untwisting is provided. The steel wire is rust-proof and covered into a film, and the stranded wire is formed to form a strand and the core wire and the side film which are treated by the core wire and the untwisted strand are re-twisted.

Page 7 5. Inventions (2). In addition, the present invention includes 25 kg/hr of shot peening. Also included is the gentleman's decoration + the town of 疋100~ powder, the iron powder for shot peening is the 涧 9 9 n / the security of the iron -^ ^ .〇; :0,2^0,4: -- > --,, Because by making the side of the PC steel strand, you can smash the strands and the green side of the strand from the heart line and then stare at Jia Fan Enli, the surface of the plating film is cleaned and improved. The adhesion of the resin film to the core wire and the side wire; the case of the 砠-face' 丄 2mrr: the incompleteness of the incomplete removal of 250kg/hr, the iron powder rupture of the electroplated frost will occur, resulting in efficiency Inappropriate condition of deterioration T and iron powder spray: In the shot peening, a mixture J for shot blasting and milling is used to make the surface of the zinc coating surface clean and moderately rough. When the diameter of the plane f ^ ' shot blasting iron powder is less than 〇·2 mm, an unsuitable situation may occur in which the surface oil cannot be removed and the surface grease is not removed. In addition, when the iron powder for production is less than 0·3 mni, the surface roughness may be unsuitable. When the line exceeds 0.8 mm, the surface roughness is too large, and the light of the coating resin is slight and the iron powder is easily broken. X text [Complex method] Hereinafter, an embodiment of the anti-recording film of the PC steel strand of the present invention, which is referred to as a film forming method, will be described below with reference to the drawings. The 'ΐ, ν forming method of the present invention is composed of the first step and the second step, and the first to third graph factories are mainly processed by the wire drawing and plating, the wire drawing and the stranding after plating, and the first step ' Figure 4 and Figure 5 show the slow-twisting of the strands processed by the strands, 1290596. V. Description of the invention (3) Forming the anti-money film, and then restoring the family. In addition, in each step, the original strand for f The second step of the state. To be explained, the same symbol is given only to the different components of ::. The constituent parts/knifes are given different symbols. The first drawing is a schematic diagram showing the actual work line 1. In addition, a cross-sectional view of the processing process of the plating process, two / lb; 疋 indicates that the busbar to be processed 2 ^ ^ „ 9 ^ ^ ^ 忒 the diameter of the bus bar 2 is 10 to 14 mm. The busbar 2 of the length of the set is wound The roller 3 is fixed to the unwinding projection 4 at one end of the processing line 1 on the drum (10), the 扛 & n paddle 1 (10).

Moreover, it is moved by the pull-out roller 5 from the opening of the shovel. 1 The bus bar 2 pulled out of the unwinding device 4 passes through: the process 7, the second strip process 8 and the shovel: the drum 3 in the winding device 10 at the end portion... _ liquid first two: two two: 6 ' *According to acid washing and water washing, starting with the cultivating product l - and then washing the busbar 2 attached to the diameter of the busbar 2 of the busbar 2 with water, and then performing the cold drawing of the wire. . Heart Ding ~ drawing process, making a diameter of 5~9 丽 =' raw material line u of diameter 5~9 which will be formed by ^ wire processing 7

The following is the second washing process 8 .兮 ^ ^ 0 口苐 2 times washing treatment 8 is to break the raw material line 11 times in the flux solution tank who 彳 ^ L pn ^ τ transport, in the flux solution tank: add saturated solution of vaporized money or A complex salt solution of ammonium chloride and zinc vapor. Then, the raw material riding the second washing treatment 8 is subjected to drying treatment, and then the silver silver treatment 9 is applied. Electroplating treatment for the $$F Mayuan occasion,

1290596

For example, it can be impregnated in the filling and repairing coating 12 . Moreover, the formation of 兮^ = zinc bath, the formation of electricity with zinc! Winding. Further, as the film 12, the raw material line 11 is wound by a θ, and the θ is charged with a knuckle. In addition to the galvanization described above, a galvannealed alloy, a galvanized alloy, a copper plated or a secret metal may be used. 7H/H is a schematic view showing the wire drawing work line 13 of the wire drawing portion 7 of the raw material wire 1 in the first step. The processing line is also on

In the same manner, the drum 3 & which is wound around the raw material line ii is fixed to the unwinding device 4 at one end of the processing line 13, and the raw material drawn by the drawing roller 5 is pulled by cold drawing. The wire 丨j is subjected to the wire drawing process 7 and wound around the roller shackle fixed in the other winding device 1 。. As shown in Fig. 2b, the plating process 7 has been formed. The raw material strand 丨 of the membrane 丨 2 is drawn into a stranded raw material wire 丨 4 having a diameter of about 4 to 5 mm. Further, Fig. 3 a is a raw material wire for the stranded wire which has been pulled in the first step. A schematic diagram of the strand processing line 6 of the stranding process 。 5. The same is the same as the above, and the drum 3b of the raw material line 4 for winding the strand is fixed to the strand processing line. One end of the unwinding device of 16

The upper 4 is pulled out by the pull-out roller 5 to perform stranding treatment. In this case, the stranding process 1 is performed by the raw material wire 14 of the seven strands. Therefore, at one end of the stranding processing line 16, the drum 3b of the raw material wire 14 for winding the strand is wound. They are respectively fixed on the seven unwinding devices 4, and the seven strands are pulled out by the raw material wire 14 'twisted by the twisted wire processing 1 to form a PC steel strand 19, which is wound around the other end. The winding device 1 is on the drum 3c in the crucible. The stranding process 15 is to twist the 7 strands of the raw material strands 14 together, and one of the seven strands is used as the core strand η, and around the core strand 17 is six.

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The stranded wire 1 is formed as a side line 18 as a side line 18, and a P C steel strand 19 is formed. Further, the core wire 17 and the side wire 18 of the P C steel strand 1 are formed into a film. And twisted into a spiral shape, as shown in Fig. 3b, and the rust-preventing coating is formed in the second step in the first step. Fig. 4 is a view showing the second step. On one end side, the other end side of the drum 3c of the PC steel strand 19 is provided in order to be adjacent to each other. 2, the front side expands the maintenance device 2, the heat device 25, and the powder coating device 2β set 2 8 , rear side expansion maintaining device 2 9 device 3 1 , micropore detecting device 3 2 , core wire adjusting device 24 and i-th plus g 34 〇 anti-money film processing line 21 fixed winding In the first step, the winding device 4 is formed, and the unwinding device 5 is provided with the pull-out roller 5, the slow release device, the core wire adjusting device 24, the first feeding, the second heating device 27, and the cooling device. , a slow closing device 3〇, a film thickness measuring and withdrawing device 33 and a winding device 1〇, and a shot blasting device is provided between the V devices 25 as above, 19, and can be wound by a pulling wire 7 7 holding device 23 When the remaining line 17 and the side are combined, that is, the diameter of the coiled PC steel strand ί f on the unwinding device 4 is sequentially pulled out, and the device 22 is slowly unwound, so that the 盥 = shape The side line 18 is untwisted ☆, and the front and rear expansions are expanded, and the second is expanded to a predetermined interval, and the state is maintained.

The core wire adjusting device 2 4 on the rear side of the front side expansion device 2 3 : the core wire HI generated when the resin film 20 is formed by the second wire and the side wire 18 is due to 'when the pc steel wire 19 is slowly unwound, When the core film is formed into a resin film having a desired thickness and the yarn is slowly closed again, the thickness of the straight line of the core 17 and the side line 18 is 2090, and the side corresponding to the core wire 7 is 1290596. DESCRIPTION OF THE INVENTION (6) The winding of the wire 18 has only the thickness portion. Therefore, the length of the side line 18 corresponding to the anger line 17 is insufficient compared to before the slow unwinding, and the anger line is slowly caused. Remaining.

The core wire adjusting device 24 is composed of a fixed pulley 36 supported by a support arm 35 and a movable pulley 37. Usually, the movable pulley 37 is pulled from the fixed pulley 36 in a pulling direction by a screw magazine or the like. Further, even in the state in which the twisting is disengaged by the slow unwinding device 2 2 and the side wires 18 are expanded to a predetermined interval by the front and rear expansion maintaining devices 2 3 and 29, the core wire 7 has been slackened, and is presented. Remaining state. The remaining core wire 17 can be adjusted as follows: the side pulled out from the slow unwinding device 2 2 is wound on the movable pulley 37 and folded back to be hung on the fixed pulley 36. Pulling out on the rear side, when it is wound, the fixed pulley 36 and the movable pulley 37 are in a close state because the remaining portion is small, but when the remaining portion is gradually increased, the movable pulley 37 can be pulled away from the fixed pulley 36. The direction of movement is such that the remaining points of the core wire 17 are not slack. Further, the shot blasting apparatus 34 uses a mixture of shot blasting and milling, and sprays the mixed iron powder to the core wire and the side wire 18 in a slow untwisted state at an injection amount of 100 to 250 kg/hr. On the surface of the plating film 12;

Ϊ Ϊ ί ί Attached to the surface of the grease or other attachments or rust removal, etc.: The surface forms a rough surface. For example, the iron powder for shot peening is 〇. 2~ 〇 right spherical iron powder, iron powder for milling In the case of the prevention of the second step, the resin film 2 is formed as shown in Fig. 5a, and the resin film 2 is formed by the shot blasting device 34. Spray

1290596 V. INSTRUCTIONS (7) Pill treatment 3 8 'The shot peening 3 8 ' sprays the mixed iron powder for shot peening and milling to the bag evenly by twisting the pc steel strand 19 The core wire 17 which has been slowly unwound and the surface of the plating film 12 on each of the side wires 18 are cleaned, and a rough surface is formed, and the formation of the rust-preventing film in the second step can be improved, that is, the resin can be improved. Adhesion of the film 2 〇.

This % ' shot peening 38 is suitably carried out within a range of injection amount of -250 kg/hr, preferably 18 〇kg/hr. In addition, when the amount of shot blasting is less than 100 kg/hr, for example, an unsuitable case where the portion of the oily moon which adheres to the surface of the plating film 12 cannot be completely removed, or when it exceeds 250 kg/hr, The peeling off occurs, and the plating film 12 is lost, or in particular, the molten iron powder is broken and the efficiency is deteriorated. The core wire 17 and the side wires 18 which have finished the shot peening 3 8 are maintained in the original slow unwinding state, moved to the i-th heating device 25, and heated to the desired temperature by the i-th heating device 25, and heated therein. The state is moved to the powder/coating device 26. In the powder coating device 26t, the creping resin or the thermoplastic resin is applied substantially uniformly around the 'core wire 17 and the respective side wires 18 in a heated state by an electrostatic coating method. ^

" The resin used at this time may be, for example, an epoxy resin, a polyester resin, a fluorinated resin, a polyethylene resin or the like as an electrostatic coating method, for example, an electrofluid impregnation powder coating technique. Further, the resin coated with the powder around the core wire 17 and the respective side wires 18 in the preheated state is melted by the heat generated by the application, and most of the coated adhesive surface is melted and attached in a film shape. The anger line 17 and the side lines 18 of the coating resin are maintained slowly and unwrapped 1290596

V. INSTRUCTIONS OF THE INVENTION (8) L-transient to the second addition of the 9th. 7. Heat-coated melted ~ tree', and a substantially uniform film-like resin coating 2 f) RH· " Around the 18th. And "曰 臈 2〇 attached to the core wire 17 resin line = around each side line 18 to form a cooling shock 28 after the melting 28 ϊϋ ,, by setting 2 "mu body cooling, # this can ensure that the tree 1 7 and each side wire 丨8 is divided into two layers of i film. The resin is expanded as a rust-proof film from the knife: two trees; the core wire 17 of the film 20 and the side wires 18 are twisted: 'Right closed film is shown in Figure 5b, and as shown in Figure 5c, the pc steel strand 19 of the double-layer anti-recording film with independent lines and rust film 20 is completed. The steel strand 19 of the double-layer rust-proof coating is formed, and the micro-hole detecting device 32 of the film coating is used to detect the field of the rust-proof coating, and the detachment device 33 is detached from the winding device 1 The method for forming the rust-proof coating of the PC steel strand which is invented by f. The second side of the σ-side line forms a double layer of the plating film and the resin film m m. ^. by forming in the plating film After the shot blasting, the adhesion and adhesion of the plating film are improved. In addition, the spear adhesion is good, so the rust resistance of the resin film is improved by 250 k k. The shot size of the shot peening is taken as 10 〇 〜 , and the mixed iron powder for shot peening and milling is used, and the plating film in each of them can be cleaned and a moderately rough surface is formed. The above is only the present invention. In the preferred embodiment, the thermal device 27 is used to make the cooling and deuteration in each side line state, and the core wire coating film 20. After the rear side is placed 30, the plating thickness is measured again. Anti-rust coating, resin coating, due to dense core wire

Not used

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Page 15 1290596 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1a is a schematic view showing a plating processing line in a first step of a method for forming a rust-proof film of a PC steel strand according to the present invention, and Fig. 1b is a processed bus bar and Fig. 2a is a side view of the wire drawing work line in the first step of the same, and Fig. 2b is a cross-sectional view of the raw material wire for the strand to be processed; Fig. 3a is the same as the first The side view of the strand processing line in the step is a cross-sectional view of the processed PC steel line, and the fourth drawing is the rust-proof processing line of the resin coating treatment in the second step. Side view; and

Fig. 5a is a cross-sectional view of the raw material strand for untwisted stranded yarn of the same, Fig. 5b is a cross-sectional view of the slow closing device, and Fig. 5c is a cross-sectional view of the PC steel strand forming the rustproof coating. [schema description]

1 Processing line 2 Busbar 3 Roller 3 a Roller 3b Roller 3c Roller 4 Unwinding device 5 Pull-out roller 6 First washing process 7 Pulling process 8 Second washing process Page 16 1290596 Simple illustration 9 Electroplating 10 Winding device 11 Raw material line 12 Electroplating film 13 Processing line 14 Stranded wire for raw material 15 Stranded wire processing 16 Processing line 17 Core wire 18 Side wire 19 PC Strand 20 Resin film 21 Processing line 22 Slow solution Opening device 23 Front side expansion maintaining device 24 Core wire adjusting device 25 First heating device 26 Powder coating device 27 Second heating device 28 Cooling device 29 Rear side expansion maintaining device 30 Slow closing device 31 Film thickness measuring device 32 Micropore detecting device

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Claims (1)

1290596 —---------------- VI. Patent application scope 1. A method for forming a rust-proof film of a PC steel strand, which is characterized by the following steps: / in a raw material line a plating film is formed on the outer peripheral surface; the raw material wire forming the electric bond film is subjected to a wire drawing process, and a raw material wire for forming a wire is formed; and the strand is formed by twisting a plurality of raw material wires together a pre-strength steel strand consisting of a core/tree line; the strand and the strand temporarily untwisting the PC strand and processing the core strand and the side strand/bill, and performing the shot peening The processed core wire and the outer peripheral surface of the side wire/the resin film are formed, and the resin film is cooled and twisted again. The rust-proof coating of the pc steel strand according to item 1 of the upper application patent range is formed. The injection amount of the shot peening is 100 to 250 kg/hr. Please refer to the method for forming a rust-proof coating of a PC steel strand according to the first or second aspect of the patent, wherein the shot peening uses a full-filled iron powder comprising iron powder for shot blasting and powdered powder of powder film t The iron powder for shot peening is a ball 1 iron powder having a diameter of 0·2 to 0·4 mm, and the powder is made of iron powder with a fineness of 〇·3 to 0·8 mm of cubic iron powder.