A method of manufacturing a ribbon cable (options)

 

(57) Abstract:

Usage: cable equipment, methods of making the ribbon cable (options). The inventive isolated polymeric material wires stretch across the volatile liquid capable of when interacting with the polymer to form the adhesive layer, stick together and form the cable at a certain pressure and dried out the specified fluid. One method involves the following operations: when pulling wires through the liquid them have at some distance from each other, thus forming the adhesive layer, and bonding and the formation of the cable is carried out by laying in one plane is provided in the contact wires on the working surface of the support element located at the specified liquid, and drying is performed on the reference element, then the cable is removed from the last. The second method involves the following operations: wire or multiple wires wound on the drum, laying coils close to each other, and bonding and the formation of the cable produced by immersing the lower part of the drum in the liquid, through its rotation, remove the drum from the liquid and produce sudnoremontno with single wires, placed at a certain distance from each other, through the fluid flow tape made from the same material as the insulation of the wires, forming on the wires and the tape adhesive layer, and bonding cable is carried out using Opera element, imposing on a ribbon wire having them in parallel at a given distance from each other, and then remove the cable from the liquid and dried. The method improves the characteristics of adhesive joints and extends the range of the ribbon cables. 3C. and 8 C. p. F.-ly.

The invention relates to a cable technology, in particular to technology and devices for the manufacture of a ribbon (flat) cable.

Ribbon cables are widely used in electronic devices, for example, on television, in computing, magnetic recording and playback of information, signaling, communications.

Known methods of manufacturing the ribbon cable from the parallel insulated wires by gluing. They either do not contain regulatory elements of the mounting of the qualities of the ribbon cable, which consists in the ability of the wires to be separated by lines of adhesive joints without gap insulating shells comprovide the third method of manufacturing the ribbon cable (the Japan patent N 57-57806 class. H 01 13/00, 7/08,1982) consists in the fact that the insulated wire is cut into pieces of a certain length, with the end parts of the received workpieces remove the insulation coating and the workpiece are grouped so that they are adjacent to each other. Ribbon cable is produced by bonding adjacent blanks. In this way the necessity of the separation of the wires during installation is eliminated, since the ends of the wires exposed and prepared for soldering at the stage of manufacture of the cable.

An example of the second solution is a continuous method for the production of the ribbon cable for U.S. patent N 3005739 class. 156-7, 1961, which is a prototype of the proposed method. According to this method, a separate wire, insulated polyvinyl chloride (PVC) plastication level and bringing them to touch in the same plane and maintaining under tension, stretch through the solvent capable of dissolving the PVC composition, soak in the solvent for a specified short period of time, sufficient to link the adjacent wires. Additional claims of the prototype indicated that the PVC coating contains from 25 to 60% of PVC resin in the solvent used tetrahydrofuran or tetrahydrofuran in the which is substantially below the boiling point tetrahydrofuran under agamospermy pressure, and the evaporation of residual solvent from the finished ribbon cable is carried out using heat.

In this way not provided for regulating the strength of adhesive joints, selected only the optimum interval of contact of the wires with the solvent (0,45-1), within which to obtain a cable of the desired quality, provided a reliable mutual adhesion of the wires to each other.

However, when the humidity of tetrahydrofuran, easily absorbing atmospheric moisture and temperature fluctuations optimal location of the wires in the solvent will be different, therefore, to maintain a given level of quality of cable you need rapid regulation of the strength of adhesive joints.

Another disadvantage of this method is that parallel spaced wires in the process of pulling through the liquid bonding is subjected only to the contact and tensile strength, which does not create pressure for bonding wires, i.e., force directed normal to the tensile force and determining the quality of adhesive joints.

In addition, this method allows you to get only one kind of ribbon cable manufacturer is prohibited.

The objective of the invention improve the quality of the produced ribbon cable by improving characteristics of adhesive joints between the wires and the expansion of the range of the ribbon cables obtained by adhesive technologies, using the phenomenon of dissolution of polymeric insulation of the wires.

The problem is solved using the characteristics listed in the claims.

In the method of manufacturing the ribbon cables in the first embodiment, from a single isolated polymer material of the wires, in which the last stretch through the volatile liquid capable of interaction with said polymer to form an adhesive layer, stick together and form the cable at a certain pressure and dried out the specified fluid distinctive feature is that when pulling wires through the liquid, they have some distance from each other, thus forming the adhesive layer, and bonding and the formation of the cable is carried out by laying in one plane is provided in the contact wires on the working surface of the support element located at the specified liquid, moreover, the drying is performed on the reference element, then the cable is removed from the last.

Paragraph 3 of the claims characterizes Opera element, used as accessories in the process, namely as the support element using a drum having freedom of rotation around its axis, the lower part of which is immersed in a volatile liquid.

In accordance with paragraph 4 of the claims is characterized by the order of the operations of drying, namely: drying lead in two stages (first sucked air from the surface of the cable together with the vapors of the volatile liquid, and then fanned the air stream).

In the method of manufacturing a ribbon cable according to the second variant according to paragraph 5 of the claims previously single wire or multiple wires wound on the drum, laying coils close to each other, and bonding and the formation of the cable produced by immersing the lower part of the drum in the liquid, through its rotation, remove the drum from Cleopatra fluid and produce drying, after which the ring cable cut on the diameter.

According to paragraph 6 of the formula in the process with each other or mixtures of tetrahydrofuran with these liquids.

In accordance with paragraph 7 of the claims is characterized by the procedure of drying, namely: drying lead in two stages (first sucked air from the surface of the cable together with the vapors of the volatile liquid, and then fanned the air stream).

In the method of manufacturing the ribbon cable on the third option, according to paragraph 8 of foruly invention simultaneously with single wires placed at a certain distance from each other, through the fluid flow tape made from the same material as the insulation of the wires, forming on the wires and the tape adhesive layer, and bonding and the formation of the cable oudestraat with the support element, by subjecting the tape wire, having them in parallel at a given distance from each other, and then remove the cable from the liquid and dried.

According to 9 the claim process as the volatile liquid used dimethylformamide, methylene chloride, nitrobenzene, cyclohexanone, and mixtures thereof with each other or mixtures of tetrahydrofuran with these liquids.

According to 10 claim is characterized by the procedure of drying, namely: drying lead in two stages (first sucked air from the surface to the of the support element, used as accessories in the process, namely as the support element using a drum having freedom of rotation around its axis, the lower part of which is immersed in a volatile liquid.

According to the invention as a bat can be used by any liquid, which can dissolve in the polymeric insulation of the wires.

In relation to PVC such liquids are tetrahydrofuran, dimethylformamide, methylene chloride, cyclohexanone, acetone, etc. and their mixtures with each other. According to the invention used tetrahydrofuran or a mixture of: tetrahydrofuran + 10% dimethylformamide; tetrahydrofuran + 10% cyclohexanone; tetrahydrofuran + 10% acetone. The diffusion coefficient of each of these liquids in polymer matrix and, hence, their time Kleopatra different, therefore, mixing of fluid in a certain ratio to each other, you can change the time cleopatria calculated as the interval from the moment of bringing the polymer into contact with the dissolving of fluid in it before reaching the adhesive composition of the plateau stickiness. The changing composition Cleopatra mixture serves as one of methods for controlling the bonding process and regulation of cachiacel cable based on the regulation of the thickness of the adhesive layer, stackable on the wires, depending on the pressure, asked when gluing. The specific purpose of this regulation to receive the cable, in which the strength of adhesive joints is less than the strength of the casing, insulating the conductors. The bonding process is divided into two stages: first, on the surface of the single wires extend through the liquid and not in contact with each other, receive the adhesive layer exactly the same and adjustable thickness, maintaining the wire in the liquid specified time, then the wire is brought into contact with each other and compress, sticking them together and at the same time by forming the cable, can withstand its preset time in liquid to complete the structure formation and the cable is then pulled out from the liquid and dried.

An important factor affecting the quality of adhesive bonding, is the stage of bonding wires and the formation of the cable, which is carried out in the environment of volatile liquid.

In the manufacturing process of the cable technologically important operation is the creation of pressure during the bonding wires. This is because the pressure bonding should be applied when the wires already extended layer of glue and they have the s extreme isolation of wires, removing with the adhesive layer. Since the pressure cannot be created without the participation of the opposing forces, then the problem is solved by applying an element, for example, in the form of a drum having Opera the surface during the mechanical interaction which stretched wires, laid on this surface, the tension wires decomposed into two components, designed in such a way that one of them creates a pressure bonding, and the other registers unchanged position of the wires relative to each other, and the formation of the cable, its bonding, structure-forming exposure of adhesive bonding and drying the obtained product is made on the same drum at a predetermined position of the wires.

The decomposition of the tension of the wires on the two components is achieved by selecting the appropriate bearing surface relief and systems laying on her wires. For example, the drum has an annular groove with a spacing slightly less than the diameter of the bonding wires, and as the styling used such that the grooves of the drum at the same time put all the odd-numbered wires, and behind them all even. Pressure bonding, directed normal to the NEC on the wires pre-graft adhesive layer and the presence of a volatile liquid, that surrounds the lower part of the drum facilitates the creation of pressure while flowing the process of straightening the wires and forming the cable.

Consider the following system of laying wires: first, the drum is placed in a group of adjacent wires, separated by an interval of one wire (e.g., 1-St and 2-nd wire, 4-th and 5-th, 7-th and 8-th and so on) then the rows stack single wire (3rd, 6th, and so on).

According to the invention after bonding wires and pulling out the cable from the liquid, the drying process it is much faster if you first perform the suction of air from the surface of the tape, which contributes to the rapid evaporation of the volatile liquid and provides an opportunity to catch its vapor, passing the air stream passing through the absorber, and then blowing air. This technique is so accelerated drying, that is, without resorting to high temperature, allowed to rent a ready-made cable with the same drum, on which it is glued and formed.

The proposed method has the following advantages over the known method:

improving the quality and expanding the range, as all major operations of the ribbon cable (glue and the same reference element when strictly fixed position all wires;

improving the quality, because the bonding is carried out under pressure, and characteristics of adhesive joints available for the regulation;

improving the quality, as when drying the cable is protected from shrinkage of the adhesive joints, fluctuations in the distance between the wires and the appearance of waviness of the tape, since the drying is performed on the same support element, providing a complete absence of mechanical impacts on the formed adhesive bond rigidly fixed position of the wires.

Conditions for progress according to the second variant. The proposed method allows to get the ribbon cable in the form of segments of a given length. According to this method, the cable is made of a single wire, coiled with one radiating coil. For this purpose, the wire is wound on the drum, which acts as a support surface, stacking the coils close to each other so that already at the stage of winding to create a pressure bonding. Then the drum is put into rotation at a certain speed and submerged at a fixed depth in a volatile liquid or a mixture of volatile liquids that can dissolve in the polymeric insulation of the wires. After a few turns, the number of which zaslannyh wires cut on the diameter. If the winding to produce simultaneously two or more wires in colour isolation, get a cable with a regular alternation of colors.

In this way fulfilled the conditions for quality of adhesive joints: the thickness of the adhesive layer regulate the number of revolutions of the drum, the lower part of which is immersed in a volatile liquid, pressure bonding create on the stage of formation of the cable, and the operation wire connections produce a layer of volatile liquid. In addition, the method eliminates the necessity of using a large number of radiating coils and allows you to get pieces of cable of any desired length, using a set of drums of different diameters and with any given number of wires in the cable.

The process conditions according to the third embodiment. The wires are parallel to and at a specified distance from each other, and the tape made from the same polymer as the wire insulation, stretch, preventing them from contact, through the volatile liquid, increasing on the wires and the ribbon layer of glue, then use the support element is placed on the tape and stick with it, creating pressure due to the tension of the wires or by means of the clamping Pris which gives the chance to receive a ribbon cable with wires, spaced from each other at a given distance, which significantly reduces the capacitance between adjacent wires in comparison with cable in which the insulating sheath conductive wires are connected directly.

The technical Association of the three solutions in one application due to the fact that these three ways to solve the same goal of improving the quality of the cable by improving characteristics of adhesive joints and increase range of ribbon cables.

Example. Were making 48-pin ribbon cable from wire EOM-12 with the device that implements the proposed method. Characteristics of adhesive joints under a given mode of bonding regulated by changes in the composition of the volatile liquid. For this lineshutdown device tub was consistently filled with volatile liquid selected composition and exercised string wire with a speed of 18 m/h at the next bonding mode: duration Cleopatra exposure of 4.5 with, bonding with 1, structure-forming exposure of 5.6 and drying 38 C.

Received the cable for testing cut into pieces and after 24-hour exposure to air to stabilize Izvolov, for compositions according to the invention is in the range from 0,291 to 0,455 kg

For comparison, the measured force of rupture of the wire type EOM N 12 different batches of manufacture, it is in the range from 0,680 up at 0.730 kg

The strength of adhesive joints does not exceed the strength of the shell insulation of the wires, so the separation of the wires in the cable when the installation occurs along the line of adhesive joints through their break.

1. A method of manufacturing a ribbon cable from a single isolated polymer material of the wires, in which the last stretch through the volatile liquid capable of interaction with said polymer to form an adhesive layer, stick together and form the cable at a certain pressure and dried outside a specified liquid, characterized in that when pulling wires through the liquid them have at some distance from each other forming the adhesive layer, and bonding and the formation of the cable is carried out by laying in one plane is provided in the contact wires on the working surface of the support element located at the specified liquid, and drying is performed on the reference element, then the cable is removed from the last.

2. JV is obenza, cyclohexanone, and mixtures thereof with each other or mixtures of tetrahydrofuran with these liquids.

3. The method according to p. 1, characterized in that the support element using a drum having freedom of rotation around its axis, the lower part of which is immersed in a volatile liquid.

4. The method according to p. 1, characterized in that the drying lead in two stages, the first being sucked air from the surface of the cable together with the vapors of the volatile liquid, and then fanned the air jet.

5. A method of manufacturing a ribbon cable from a single isolated polymer material of the wires, in which the last stretch through the volatile liquid capable of interaction with said polymer to form an adhesive layer, stick together and form the cable at a certain pressure and dried out the specified fluid, wherein the pre-single wire or multiple wires wound on the drum, laying coils close to each other, and bonding and the formation of the cable produced by immersing the lower part of the drum in the liquid, through its rotation, remove the drum from the volatile liquid and produce drying, after which the ring cable cut on aramid, methylene chloride, nitrobenzene, cyclohexane, mixtures thereof or mixtures of tetrahydrofuran with these liquids.

7. The method according to p. 5, characterized in that the drying lead in two stages, the first being sucked air from the surface of the cable together with the vapors of the volatile liquid, and then fanned the air jet.

8. A method of manufacturing a ribbon cable from a single isolated polymer material of the wires, in which the last stretch through the volatile liquid capable of interaction with said polymer to form an adhesive layer, stick together and form the cable at a certain pressure and dried outside a specified liquid, characterized in that simultaneously with single wires placed at a certain distance from each other, through the fluid flow tape made from the same material as the insulation of the wires, forming on the wires and the tape adhesive layer, and bonding and the formation of the cable are carried out with the support element, by subjecting the tape wire, having them in parallel at a given distance from each other, and then remove the cable from the liquid and dried.

9. The method according to p. 8, characterized in that as the volatile liquid used by dimethylformamide.

10. The method according to p. 8, characterized in that the drying lead in two stages, the first being sucked air from the surface of the cable together with the vapors of the volatile liquid, and then fanned the air jet.

11. The method according to p. 8, characterized in that the support element using a drum having freedom of rotation around its axis, the lower part of which is immersed in a volatile liquid.

 

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