Seamless fabric printing machine and positioning printing method

Abstract

The invention relates to a seamless fabric printing machine and a positioning printing method.The seamless fabric printing machine comprises a machine body and a spray head installed on the machine body, a roller set is further installed on the machine body, the roller set is provided with at least two positioning rollers capable of moving relatively, the circumferential surface of each positioning roller is provided with a friction face, and each friction face is composed of a plurality of positioning needles bent in the same direction; and the height of the tip of each positioning pin in the radial direction of the positioning roller is equal to or lower than the maximum bending height of the positioning pin. The device has a good positioning effect on all fabrics, and the surfaces of the fabrics cannot be damaged due to surface friction resistance in the using process; and the fabric can absolutely synchronously drive with the positioning roller, so that the precision of jet printing patterns is improved.

Description

Technical Field

[0001] The invention relates to the technical field of positioning printing machines, in particular to a seamless fabric printing machine and a positioning printing method. Background Art

[0002] Printing seamless fabrics has always been a difficult problem in the industry. Since seamless fabrics have no seams and it is difficult to find positioning points, it is difficult to find the starting and ending points of printing when feeding and positioning seamless fabrics, resulting in difficult positioning of printing and a high defect rate of printed products.

[0003] Especially the commonly used positioning rollers, in order to facilitate loading and unloading, the surface of the positioning rollers is made smooth to reduce the friction of loading and unloading. This causes the fabric to easily move on the surface of the positioning roller during the transmission printing process, affecting the printing effect. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a seamless fabric printing machine and a positioning printing method with a reasonable structure, and provides a printing machine with a friction resistance positioning roller. The positioning roller is no longer a single roller to position a piece of fabric, but at least two rollers are used to move relative to each other to expand and tighten the fabric for printing; after the rollers are locked, the fabric is easy to load and unload, thereby achieving the purpose of facilitating loading and unloading and facilitating positioning at the same time.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A seamless fabric printing machine comprises a machine body, a nozzle mounted on the machine body, a roller group mounted on the machine body, and at least two positioning rollers capable of relative movement are arranged in the roller group.

[0007] The circumferential surface of each positioning roller is provided with a friction surface, which is composed of a number of positioning pins bent in the same direction. The height of the tip of each positioning pin in the radial direction of the positioning roller is equal to or lower than the highest height of the bending of the positioning pin.

[0008] As a further improvement of the above technical solution:

[0009] The positioning rollers of the roller set are arranged in a plane or in a circle.

[0010] When the positioning rollers of a group of rollers are arranged in a plane, at least one positioning roller can move relative to the fuselage.

[0011] The positioning roller that can move relative to the machine body is the positioning roller that is necessary for the fabric to be wound around when the fabric is in a tensioned state.

[0012] When the positioning rollers of a roller group are arranged in a circle, the center position of the circle is a blank position.

[0013] The seamless fabric is positioned full width on the friction surface.

[0014] The bending direction of the positioning pins on all positioning rollers is the same.

[0015] A positioning printing method using a seamless fabric printing machine for positioning printing, wherein the displacement of positioning rollers adjusts the tension of fabrics; the positioning rollers rotate synchronously in the same direction, and the anti-slip friction surface formed by the needle tip surface of the positioning needle drives the fabric to rotate synchronously.

[0016] As a further improvement of the above technical solution:

[0017] Reduce the distance between the rollers and put the fabric on the rollers. At this time, the fabric is in a loose and hanging state, and there is no positioning tension between the fabric and the friction surface.

[0018] Printing stage: the positioning roller is reset, the fabric is gradually tightened; the contact area between the friction surface and the fabric gradually increases, the bent part of the positioning needle and the side of the needle tip contact the fabric,

[0019] Cutting stage:

[0020] When the fabric is tensioned by the positioning roller, the bent section and needle tip of the positioning needle tend to be flat against the fabric, and the positioning needle located in the tangent direction of the fabric exerts maximum gripping force on the fabric to ensure that the fabric and the positioning roller rotate synchronously.

[0021] The beneficial effects of the present invention are as follows:

[0022] The present invention is designed for seamless fabrics, but is applicable to both seamless fabrics and seamed fabrics, has a good positioning effect on all fabrics, and will not damage the fabric surface due to surface friction resistance during use; the positioning rollers are locked during loading and unloading to facilitate the removal of the fabric, and will not cause hard pulling, hard tearing, or hooking of the fabric.

[0023] The positioning rollers provided by the present invention have multiple arrangements, including arranging a plurality of positioning rollers in the horizontal direction or arranging a plurality of positioning rollers in the circumferential direction, and any number of positioning rollers can be selected to tension the fabric. This arrangement of multiple positioning rollers can adapt to fabrics of different sizes, and in theory, only one of the positioning rollers needs to be displaced to change the tension on the fabric. Therefore, although there are many positioning rollers, it is not necessary to configure a power structure for each of them. The positioning rollers can also be disassembled and installed according to actual needs, and the production cost can be effectively controlled.

[0024] The key point of the present invention is to provide a special needle friction surface, which is composed of a plurality of curved needles arranged in an array. The bending direction of the curved needles is consistent with the direction of the positioning roller. When the positioning roller rotates, the needle end of the curved needle provides friction force, driving the fabric and the positioning roller to rotate absolutely synchronously, ensuring the accuracy of the printing position. Since there are many needles and the needle tip does not completely contact the fabric, the needle tip does not damage the fabric. This non-damaging positioning needle surface is also very easy to package. It can be effectively packaged with a layer of paper surface, which can prevent the needle surfaces from hooking up with each other during the stacking and storage process, and also prevent the operator's skin from being hurt. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the roller part of the present invention. Figure 1 and Figure 2 In order to avoid the image being too dense and affecting the reading of the image, only some positioning pins are marked.

[0027] Figure 3 It is a schematic diagram of the structure of a positioning pin of the present invention.

[0028] Figure 4 It is a schematic diagram of the staggered arrangement of the positioning pins of the present invention on a specified surface.

[0029] Figure 5 It is an arrangement of positioning rollers, which are set linearly in the horizontal plane.

[0030] Figure 6 Another arrangement of the positioning rollers is to set them on the inner circumference of the vertical plane.

[0031] Figure 7 This is the third arrangement of positioning rollers. On the basis of the horizontal arrangement, more positioning rollers are added in the vertical plane to adapt to large-sized fabrics.

[0032] Among them: 1. Machine body; 2. Printhead; 3. Positioning roller; 4. Positioning needle;

[0033] 401, extension section; 402, bending section; 403, tip. DETAILED DESCRIPTION

[0034] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0035] like Figure 1-Figure 4 As shown, the seamless fabric printing machine of this embodiment includes a machine body 1, a nozzle 2 installed on the machine body 1, and a roller group is also installed on the machine body 1. The roller group is provided with at least two positioning rollers 3 that can move relative to each other.

[0036] The circumferential surface of each positioning roller 3 has a friction surface, which is composed of a number of positioning needles 4 bent in the same direction. The height of the tip 403 of each positioning needle 4 in the radial direction of the positioning roller 3 is equal to or lower than the highest height of the bending of the positioning needle 4.

[0037] The positioning rollers 3 of the roller group are arranged in a plane or in a circumferential shape.

[0038] When the positioning rollers 3 of a group of rollers are arranged in a plane, at least one positioning roller 3 and the fuselage 1 can move relative to each other.

[0039] The positioning roller 3 which can move relative to the machine body 1 is the positioning roller 3 which is necessary for the fabric to be wound around when the fabric is in a tensioned state.

[0040] When the positioning rollers 3 of a roller group are arranged in a circle, the center position of the circle is a blank position.

[0041] The seamless fabric is positioned full width on the friction surface.

[0042] The positioning needles 4 on all positioning rollers 3 have the same bending direction.

[0043] In the positioning printing method of the present embodiment using a seamless fabric printing machine for positioning printing, the displacement of the positioning roller 3 adjusts the tension of the fabric; the positioning roller 3 rotates synchronously in the same direction, and the anti-collision friction surface formed by the needle tip surface of the positioning needle 4 drives the fabric to rotate synchronously.

[0044] Reduce the distance between the rollers and put the fabric on the rollers. At this time, the fabric is in a loose and hanging state, and there is no positioning tension between the fabric and the friction surface.

[0045] Printing stage: the positioning roller 3 is reset, and the fabric is gradually tightened; the contact area between the friction surface and the fabric gradually increases, and the bent part and the side edge of the needle tip of the positioning needle 4 contact the fabric.

[0046] Cutting stage:

[0047] When the fabric is tensioned by the positioning roller 3 , the bent section 402 and the needle tip of the positioning needle 4 tend to be flat against the fabric, and the positioning needle 4 located in the tangent direction of the fabric applies the maximum gripping force to the fabric to ensure that the fabric and the positioning roller 3 rotate synchronously.

[0048] The specific structure and working principle of the present invention are as follows:

[0049] The purpose of the present invention is to provide a printing device that is easy to position for seamless stretch fabrics, such as seamless underwear. Taking seamless underwear as an example, the shape is a tube without seams. Generally, seams can be used as a positioning reference during the printing and dyeing process, but seamless fabrics are difficult to position, and it is also difficult to accurately print patterns on the fabric surface.

[0050] The present invention adds a friction surface on the surface of the positioning roller 3, and the friction surface is formed by a plurality of bent positioning needles 4 arranged in an array. The greatest advantage of this friction surface is that it can provide reliable gripping force without damaging the fabric.

[0051] In particular, compared to traditional friction surfaces, such as Velcro with a structure similar to the needle friction surface of the present invention, although Velcro has a limiting force, it also causes great damage to the fabric, so limiting the fabric without damaging the fabric is the most important technical point of the present invention.

[0052] The positioning needles 4 on the surface of the positioning roller 3 have a large coverage area, basically covering the entire outer cylindrical surface of the positioning roller 3. It is required that during the synchronous transmission process, the entire surface of the fabric is covered on the friction surface of the needle surface to ensure that the tension of each section of the fabric is the same, and there will be no situation where the head end or the tail end is slightly loose due to not being tensioned by the needle surface, thereby affecting the printing effect.

[0053] like Figure 3 and Figure 4 As shown, the positioning pins 4 can be regarded as a plurality of circles, and two adjacent circles of positioning pins 4 are arranged alternately. Each positioning pin 4 has the same structure, including an extension section 401 extending radially from the surface of the positioning roller 3, a bending section 402 located at the top of the extension section 401, and a tip 403 located at the end of the bending section 402 away from the extension section 401.

[0054] All the bending sections 402 are bent tangentially toward the positioning roller 3, and the angle between the extension section 401 and the bending section 402 is between 88° and 93°, preferably slightly larger than a right angle, so as to provide a gripping force for hooking outward. Since the number of positioning needles 4 is large and they are closely arranged, the needle tips will not damage the fabric or skin when they contact a relatively large area of ​​fabric or skin. However, since the fabric also has a rough surface, it is sufficient to grip the fabric.

[0055] like Figure 3 and Figure 4 As shown, the needle tip structure is wedge-shaped, and the wedge-shaped part has at least two wedge surfaces, wherein the side facing the positioning roller 3 and the bending section 402 are located on the same smooth curve, and the top wedge surface is inclined downward toward the side of the positioning roller 3, which can grasp the elastic fabric while reducing the probability of the needle tip piercing the fabric. When the needle tip does not pierce the fabric or partially pierces the textile coil, it will not cause tearing damage to the fabric.

[0056] Based on the above-mentioned characteristic of not easily damaging foreign objects, when this positioning roller 3 needs to be stored or stacked, it only needs to be wrapped with a layer of paper or a layer of relatively smooth material to isolate adjacent positioning rollers 3 and prevent the needle tips from hooking and deforming between the two positioning rollers 3. It is very convenient to store.

[0057] The present invention also provides two roller group designs in two arrangement modes, including a roller group design arranged in a linear array and a roller group design in a circular array.

[0058] Conventional clothing such as seamless underwear, e.g. Figure 5 As shown, generally two positioning rollers 3 arranged in the same horizontal plane can meet the positioning requirements. When in use, one positioning roller 3 moves relative to the other positioning roller 3 to reduce the distance between the two, so that the fabric can be easily put on the two positioning rollers 3, and then the positioning roller 3 is reset to tighten the fabric. At this time, the friction surface of the positioning roller 3 exerts a gripping force on the fabric, and the fabric and the positioning roller 3 can rotate absolutely synchronously, which makes it easier to locate the initial position of the fabric and the end of the rotation, thereby improving the printing accuracy.

[0059] The displacement of the positioning roller 3 can be achieved by arranging a cylinder on the slide rail, the cylinder driving the positioning roller 3, or a screw pushing the positioning roller 3, etc., which are mature technologies and are not described in detail in this embodiment.

[0060] If the size of the seamless fabric is larger, multiple positioning rollers 3 can be arranged in the same horizontal plane, or the spacing between the positioning rollers 3 can be increased, or multiple positioning rollers 3 can be set in a vertical plane. Similarly, in this way, at least one movable positioning roller 3 is used to facilitate loading and unloading.

[0061] As an alternative, when printing large seamless fabrics, such as Figure 6 As shown, multiple positioning rollers 3 can also be arranged in a circle. The circular arrangement can significantly reduce the width of the equipment in the horizontal plane and can tension fabrics of larger sizes. Among the positioning rollers 3 arranged in a circle, two positioning rollers 3 can be used to tension the fabric, three positioning rollers 3 can be used to tension the fabric, or all positioning rollers 3 can tension the fabric at the same time. It should be noted that the positioning rollers 3 arranged in a circle should leave a blank at the center of the circle and not set the positioning rollers 3. This is to prevent too many positioning rollers 3 from causing inconvenience in moving the positioning rollers 3 or inconvenience in loading and unloading fabrics; during the transmission of the fabric, the point of action of the tensioning force is also more concentrated and will not be affected by too many friction surfaces.

[0062] The above-mentioned roller group design methods have another advantage, that is, no tensioning wheel is required. Generally speaking, this structure similar to belt synchronous transmission may have local looseness, and a tensioning wheel is required to adjust the tension. However, the positioning roller 3 in the present invention can move and adjust the tension by itself, and the friction surface has a reliable gripping force, and there will be no slipping of the belt or fabric due to local looseness. Therefore, the tensioning roller in traditional printing and dyeing is also omitted, which is more conducive to simplifying the structure if it is a small device.

[0063] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A seamless fabric printing machine, comprising a machine body (1) and a nozzle (2) mounted on the machine body (1), characterized in that: A roller group is also installed on the machine body (1), and the roller group is provided with at least two positioning rollers (3) capable of relative movement. The circumferential surface of each positioning roller (3) is provided with a friction surface, which is composed of a plurality of positioning needles (4) bent in the same direction, and the height of the tip (403) of each positioning needle (4) in the radial direction of the positioning roller (3) is equal to or lower than the highest height of the bending of the positioning needle (4).

2. The seamless fabric printing machine according to claim 1, characterized in that: The positioning rollers (3) of the roller group are arranged in a plane or in a circumferential shape.

3. The seamless fabric printing machine according to claim 2, characterized in that: When the positioning rollers (3) of a group of rollers are arranged in a plane, at least one positioning roller (3) and the machine body (1) can move relative to each other.

4. The seamless fabric printing machine according to claim 3, characterized in that: The positioning roller (3) is capable of relative movement with the machine body (1), and is the positioning roller (3) that is necessary for the fabric to be wound around when the fabric is in a tensioned state.

5. The seamless fabric printing machine according to claim 2, characterized in that: When the positioning rollers (3) of a roller group are arranged in a circle, the center position of the circle is a blank position.

6. The seamless fabric printing machine according to claim 1, characterized in that: The seamless fabric is positioned full width on the friction surface.

7. The seamless fabric printing machine according to claim 1, characterized in that: The positioning needles (4) on all positioning rollers (3) have the same bending direction.

8. A positioning printing method using the seamless fabric printing machine according to claim 1 for positioning printing, characterized in that: The displacement of the positioning roller (3) adjusts the tension of the fabric; the positioning roller (3) rotates synchronously in the same direction, and the anti-slip friction surface formed by the needle tip surface of the positioning needle (4) drives the fabric to rotate synchronously.

9. The positioning printing method according to claim 8, characterized in that: The specific steps for positioning printing are as follows: Loading stage: at least one positioning roller (3) in the roller group is displaced to reduce the distance between the roller groups, and the fabric is put on the roller group. At this time, the fabric is in a loose hanging state and has no positioning tension force between the fabric and the friction surface. Printing stage: the positioning roller (3) is reset, and the fabric is gradually tightened; the contact area between the friction surface and the fabric is gradually increased, and the bent part and the side edge of the needle tip of the positioning needle (4) are in contact with the fabric, and the material feeding stage is entered.

10. The positioning printing method according to claim 9, characterized in that: When the fabric is in a tensioned state by the positioning roller (3), the bent section (402) and the needle tip of the positioning needle (4) tend to lie flat against the fabric, and the positioning needle (4) located in the tangent direction of the fabric exerts a maximum gripping force on the fabric, ensuring that the fabric and the positioning roller (3) rotate synchronously.

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