Automatic pricking nail stretching device

Abstract

The utility model discloses an automatic pinning and stretching device, which is characterized in that slidable material racks are symmetrically arranged on two sides of a fabric stretching station, can slide and stretch out relative to the fabric stretching station, and have the same specification as a fabric to be stretched; the four-corner hidden type pricking pin mechanism comprises air cylinders and pricking pins, the four sets of air cylinders and pricking pins are installed at the four corners below the slidable material frames on the two sides respectively, the pricking pins are fixed to the movable ends of the air cylinders and arranged upwards relative to the slidable material frames, and the pricking pins can be driven by the air cylinders to eject upwards out of the slidable material frames so as to fix fabric through the four corners. The overturning clamping mechanisms are arranged on the two sides of the slidable material frame, and the overturning clamping mechanisms can overturn relative to the slidable material frame to press the fabric so that clamping and fixing can be achieved. By means of the technical scheme, the fabric feeding problem of large-size complex products is solved, and the fabric wrinkling and glue failure problems caused by large stretching and large internal corners are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fixing devices, in particular to an automatic nailing and stretching device. Background Art

[0002] At present, the automobile market pursues high-end, and most of them use coating materials, so there are more and more coated parts. The existing fixed needle structure, wiper structure, press frame and other structures will have two extreme situations when facing large-stretch composite products. When the stretch is too large, the wiper is easy to stretch it inadequately, resulting in wrinkles. When the auxiliary fixed needle is used, it will cause excessive local and overall stretching at the fixed needle, resulting in a series of side effects. When the product is too large, it is more difficult to place the fabric inside the mold. Utility Model Content

[0003] In view of the above problems, the utility model provides an automatic nailing and stretching device, which fixes the fabric on a slidable material rack through a four-corner latent nailing mechanism, and presses and fixes the fabric through a flip clamping mechanism combined with a needle, thereby achieving the best balance between wrinkles and stretching, reducing the stretching to a minimum while adjusting the wrinkles, and realizing the tightening of a one-step tufting composite mold with large stretch and large internal angle, solving the problem of fabric feeding for large-sized and complex products, and avoiding the problem of fabric wrinkles and debonding caused by large stretch and large internal angle.

[0004] To achieve the above purpose, the utility model provides an automatic nailing and stretching device, comprising: a slidable material rack, a four-corner latent nailing mechanism and a flip clamping mechanism;

[0005] The slidable material rack is symmetrically arranged on both sides of the fabric stretching station, and the slidable material rack can slide out relative to the fabric stretching station and has the same specifications as the fabric to be stretched;

[0006] The four-corner latent nailing mechanism includes a cylinder and a nailing needle. Four groups of the cylinder and the nailing needle are respectively installed at the four corners below the slidable material rack on both sides. The nailing needle is fixed to the movable end of the cylinder and is arranged upward relative to the slidable material rack. The nailing needle can be pushed upward out of the slidable material rack under the drive of the cylinder to fix the fabric through the four corners.

[0007] The flipping and clamping mechanism is arranged on both sides of the slidable material rack. The flipping and clamping mechanism can be flipped relative to the slidable material rack to press the fabric to achieve clamping and fixing.

[0008] In the above technical solution, preferably, the automatic nailing and stretching device also includes a controller, which is respectively connected to the four groups of cylinders of the four-corner latent nailing mechanism to control the extension and retraction timing and extension and retraction stroke of each cylinder of the four-corner latent nailing mechanism.

[0009] In the above technical solution, preferably, the slidable material rack comprises a material frame, a left bracket and a right bracket, the left bracket and the right bracket are installed on the left and right sides of the material frame, the material frame comprises a frame plate, a material frame cylinder and a material frame guide rod, the movable end of the material frame cylinder is connected to the frame plate, and the material frame guide rod is arranged parallel to the material frame cylinder and connected to the frame plate;

[0010] The left bracket includes a left bracket plate and a left guide rail, and the right bracket includes a right bracket plate and a right guide rail, wherein the left bracket plate is mounted on the left guide rail and can slide relative to the left guide rail, and the right bracket plate is mounted on the right guide rail and can slide relative to the right guide rail;

[0011] Under the guiding action of the material frame guide rod, the left guide rail and the right guide rail, the material plate, the left bracket and the right bracket move forward and backward together under the drive of the material frame cylinder.

[0012] In the above technical solution, preferably, the longer the upward ejection stroke of the needles of the four-corner latent nailing mechanism relative to the slidable material rack within the stroke range, the higher the fixing stability of the fabric.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the fabric is fixed on the slidable material rack by the four-corner latent nailing mechanism, and the fabric is pressed and fixed by combining the flip clamping mechanism with the needle, so as to achieve the best balance point between wrinkles and stretching, and reduce the stretching to the minimum while adjusting the wrinkles, thereby realizing the tightening of the one-step tufting composite mold with large stretch and large internal angle, solving the problem of fabric feeding for large-sized and complex products, and avoiding the problem of fabric wrinkles and debonding caused by large stretch and large internal angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the combined structure of an automatic nailing and stretching device disclosed in one embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the exploded structure of an automatic nailing and stretching device disclosed in one embodiment of the utility model;

[0016] FIG. 3A to FIG. 3F This is a schematic diagram of different states of an automatic nailing and stretching device according to an embodiment of the utility model according to the working process.

[0017] In the figure, the corresponding relationship between each component and the reference numeral is as follows:

[0018] 1. Sliding material rack, 11. Frame plate, 12. Material frame cylinder, 13. Material frame guide rod, 14. Left bracket plate, 15. Left guide rail, 16. Right bracket plate, 17. Right guide rail, 18. Up and down mechanism, 2. Four-corner latent nailing mechanism, 21. Needle, 22. Cylinder, 3. Flip clamping mechanism, 31. Baffle plate, 32. Support plate, 33. Guide plate. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0021] like Figure 1 and Figure 2 As shown, an automatic nailing and stretching device provided by the utility model comprises: a slidable material rack 1, a four-corner latent nailing mechanism 2 and a flip clamping mechanism 3;

[0022] The slidable material rack 1 is symmetrically arranged on both sides of the fabric stretching station, and the slidable material rack 1 can slide out relative to the fabric stretching station and has the same specifications as the fabric to be stretched;

[0023] The four-corner latent nailing mechanism 2 includes a cylinder 21 and a nailing needle 22. Four groups of cylinders 21 and nailing needles are respectively installed at the four corners below the slidable material rack 1 on both sides. The nailing needle 22 is fixed to the movable end of the cylinder 21 and is arranged upward relative to the slidable material rack 1. The nailing needle 22 can push the slidable material rack 1 upward under the drive of the cylinder 21 to fix the fabric through the four corners.

[0024] The flipping and clamping mechanism 3 is arranged on both sides of the slidable material rack 1. The flipping and clamping mechanism 3 is flipped relative to the slidable material rack 1 to press the fabric to achieve clamping and fixing.

[0025] In this embodiment, the fabric is fixed on the slidable material rack 1 by the four-corner latent nailing mechanism 2, and the fabric is pressed and fixed by combining the flip clamping mechanism 3 with the nailing needle 22, so as to achieve the best balance point between wrinkles and stretching, and reduce the stretching to the minimum while adjusting the wrinkles, thereby realizing the tightening of the one-step tufting composite mold with large stretching and large internal angle, solving the fabric feeding problem of large-sized and complex products, avoiding the problem of fabric wrinkles and debonding caused by large stretching and large internal angles, and thus solving the performance problems such as delamination and debonding of fabric in high-temperature tests caused by this.

[0026] Specifically, the sliding design of the slidable material rack 1 facilitates the operator to hang the fabric on the material rack. The flip clamping mechanism 3 can adjust the position according to the stretching requirements, and adjust the stretching by the number and height of the rivets to meet different needs. The four-corner latent rivet structure uses the rivets as part of the tensioning, which can reduce the stretching to a minimum while adjusting the folds.

[0027] like FIG. 3A to FIG. 3F As shown, in the implementation process, for large-sized products, the slidable rack 1 is slid out, and the fabric is hung on the slidable rack 1. After the fabric is hung, the slidable rack 1 slides in. The four-corner latent nailing mechanism 2 moves down unilaterally to match the product shape. The combination of nailing and flip clamping mechanism 3 can achieve the best balance point between folds and stretching.

[0028] During the implementation process, the pins at the four corners can be retracted at different positions and different times of the mold closing according to the needs under the drive of the corresponding cylinder 21. That is, when the mold closing reaches the corresponding pinning position, the pin retracts and the other pins remain in the original state. When the mold closing process reaches the next pinning position, the next pin is retracted. This method can use the pinning as a part of the tension, and reduce the stretching to the minimum while adjusting the wrinkles.

[0029] In the above embodiment, preferably, the automatic stapling and stretching device further includes a controller (not shown in the figure), which is respectively connected to the four groups of cylinders 21 of the four-corner latent stapling mechanism 2 to control the extension and retraction timing and extension stroke of each cylinder 21 of the four-corner latent stapling mechanism 2. Through the control of the cylinder 21 by the controller, the withdrawal timing of the stapling can be controlled along with the mold closing process, so that the fabric can be kept in a stretched and wrinkle-free state during the covering process, and the ejection timing and ejection stroke of the needle 22 can also be controlled by the controller to achieve tension and fixation of the fabric.

[0030] In the above embodiment, preferably, the slidable material rack 1 includes a material frame, a left bracket and a right bracket, the left bracket and the right bracket are installed on the left and right sides of the material frame, the material frame includes a frame plate 11, a material frame cylinder 12 and a material frame guide rod 13, the movable end of the material frame cylinder 12 is connected to the frame plate 11, and the material frame guide rod 13 is arranged parallel to the material frame cylinder 12 and connected to the frame plate 11;

[0031] The left bracket includes a left bracket plate 14 and a left guide rail 15, and the right bracket includes a right bracket plate 16 and a right guide rail 17. The left bracket plate 14 is mounted on the left guide rail 15 and can slide relative to the left guide rail 15, and the right bracket plate 16 is mounted on the right guide rail 17 and can slide relative to the right guide rail 17.

[0032] Under the guidance of the material frame guide rod 13 , the left guide rail 15 and the right guide rail 17 , the material plate, the left bracket and the right bracket move forward and backward together under the drive of the material frame cylinder 12 .

[0033] In addition, the slidable material rack 1 further includes an up and down mechanism 18 on the left and right sides for controlling the up and down movement process of the slidable material rack 1 .

[0034] In the above embodiment, preferably, the longer the upward ejection stroke of the needles 22 of the four-corner latent nailing mechanism 2 relative to the slidable material rack 1 within the stroke range, the higher the fixing stability of the fabric.

[0035] In the above embodiment, the flipping and clamping mechanism 3 includes a baffle plate 31, a support plate 32 and a guide plate 33 respectively arranged on both sides of the slidable material rack 1, and the baffle plate 31 is fixed to the slidable material rack 1 through the support plate 32, and can be flipped through the guide plate 33. The baffle plate 31 can not only locate the position of the fabric, but also press and fix the fabric when flipping onto the slidable material rack 1.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic nailing and stretching device, characterized in that: include: Sliding material rack, four-corner latent nailing mechanism and flip clamping mechanism; The slidable material rack is symmetrically arranged on both sides of the fabric stretching station, and the slidable material rack can slide out relative to the fabric stretching station and has the same specifications as the fabric to be stretched; The four-corner latent nailing mechanism includes a cylinder and a nailing needle. Four groups of the cylinder and the nailing needle are respectively installed at the four corners below the slidable material rack on both sides. The nailing needle is fixed to the movable end of the cylinder and is arranged upward relative to the slidable material rack. The nailing needle can be pushed upward out of the slidable material rack under the drive of the cylinder to fix the fabric through the four corners. The flipping and clamping mechanism is arranged on both sides of the slidable material rack. The flipping and clamping mechanism can be flipped relative to the slidable material rack to press the fabric to achieve clamping and fixing.

2. The automatic nailing and stretching device according to claim 1, characterized in that: It also includes a controller, which is respectively connected to the four groups of cylinders of the four-corner latent nailing mechanism to control the extension and retraction timing and extension and retraction stroke of each cylinder of the four-corner latent nailing mechanism.

3. The automatic nailing and stretching device according to claim 1 or 2, characterized in that: The slidable material rack comprises a material frame, a left bracket and a right bracket, wherein the left bracket and the right bracket are installed on the left and right sides of the material frame, the material frame comprises a frame plate, a material frame cylinder and a material frame guide rod, the movable end of the material frame cylinder is connected to the frame plate, and the material frame guide rod is arranged parallel to the material frame cylinder and connected to the frame plate; The left bracket includes a left bracket plate and a left guide rail, and the right bracket includes a right bracket plate and a right guide rail, wherein the left bracket plate is mounted on the left guide rail and can slide relative to the left guide rail, and the right bracket plate is mounted on the right guide rail and can slide relative to the right guide rail; Under the guiding action of the material frame guide rod, the left guide rail and the right guide rail, the material frame, the left bracket and the right bracket move forward and backward together under the drive of the material frame cylinder.

4. The automatic nailing and stretching device according to claim 2, characterized in that: The longer the upward ejection stroke of the needles of the four-corner latent nailing mechanism relative to the slidable material rack within the stroke range, the higher the fixing stability of the fabric.

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