External hot cutting structure and hot cutting device

Abstract

The utility model discloses an external hot cutting structure and a hot cutting device. The external hot cutting structure comprises a cutting knife and a heating wire. The cutting knife is suitable for being in contact and pressing with the to-be-cut edge slitter edge of the blank through the cutting end, the heating wire is externally arranged at one end of the cutting knife to form the cutting end, and then hot melting cutting is conducted on the slitter edge of the blank through electric heating of the heating wire. The hot cutting device comprises the external hot cutting structure. The hot melting cutting device has the beneficial effects that the heating wire and the cutting knife are installed in a matched mode so that a blank can be subjected to hot melting cutting, compared with a traditional cutting mode, the production efficiency and the production quality of products can be effectively improved, and the heating wire is externally arranged so that mounting and dismounting can be conveniently conducted.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts processing, and in particular to an external hot cutting structure. Background Art

[0002] Automobile interior parts can generally be obtained by low-pressure injection molding or hot pressing to obtain corresponding plastic interior parts; with the improvement of living standards, a layer of leather can be adhered to the surface of the plastic interior parts after low-pressure injection molding or hot pressing to increase the appearance and softness. The adhesion of leather can be achieved by coating or hot pressing lamination.

[0003] Whether it is a plastic interior part formed by low-pressure injection molding or hot pressing, or a multi-layer interior part obtained by coating or hot pressing, after completing the corresponding processing technology, the excess waste of the blank needs to be cut. Take hot pressing as an example. During hot pressing, the area of ​​the leather is larger than the surface area of ​​the plastic interior part. After the pressing is completed, the edge of the blank will extend with excess leather waste, which needs to be cut along the edge contour of the blank to obtain the desired product.

[0004] The existing technology for cutting excess waste mainly places the blank on a fixture for positioning, and then uses a robot to carry a cutting knife to cut along the contour direction of the blank. However, the processing accuracy required for cutting by the robot is high, which makes the cost of the entire cutting equipment high. In addition, the robot needs to move along the entire contour of the blank, and the position of the robot needs to be adjusted at all times according to the direction of the contour, which will result in a longer cutting process time, thereby reducing production efficiency. Based on this, a new hot cutting device for automotive interior parts is urgently needed. Utility Model Content

[0005] One of the purposes of the present application is to provide an external heat-cutting structure that can solve at least one of the defects in the above-mentioned background technology.

[0006] Another object of the present application is to provide a heat cutting device that can solve at least one of the defects in the above-mentioned background technology.

[0007] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: an external hot cutting structure, including a cutting knife and a heating wire; the cutting knife is suitable for contacting and pressing the edge waste edge of the blank to be cut through the cutting end, and the heating wire is externally arranged at one end of the cutting knife to form the cutting end, and then the waste edge of the blank is hot-melted and cut off by electrical heating of the heating wire.

[0008] Preferably, the cutting knife is provided with a sharp corner, and the heating wire is installed at the sharp corner position of the cutting knife to form the cutting end.

[0009] Preferably, a mounting groove is provided at the sharp corner of the cutting knife, and the heating wire is suitable for being installed in cooperation with the mounting groove.

[0010] Preferably, the mounting groove is arranged to penetrate along the extension direction of the sharp corner of the cutting knife.

[0011] Preferably, the extending direction of the sharp corner of the cutting knife is straight, and the mounting groove has two sections and is respectively arranged on both sides of the sharp corner of the cutting knife.

[0012] Preferably, the depth of the installation groove is 20% to 60% of the cross-sectional size of the heating wire.

[0013] Preferably, the cutting knife is made of insulating material, and the heating wire is directly made of resistance wire.

[0014] Preferably, the heating wire comprises a shell, a resistance wire and a filler; the resistance wire is arranged in the shell and is spaced apart from the shell by the filler; the shell is made of metal material, and the filler is made of thermally conductive insulating material.

[0015] Preferably, the cross-sectional shape of the heating wire is circular; or, the cross-sectional shape of the heating wire has a sharp corner, and the heating wire is suitable for hot-melt cutting the blank through the sharp corner.

[0016] A hot cutting device comprises a fixed seat, a displacement device, a cutting knife and a heating wire; the fixed seat is fixedly arranged, the displacement device is installed on the fixed seat, the cutting knife and the heating wire are matched through an external hot cutting structure and installed on the output end of the displacement device, and then the cutting knife drives the heating wire to perform hot-melt cutting of the waste edge of the blank under the drive of the displacement device.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] By installing the heating wire in conjunction with the cutting knife, the blank can be cut by hot melt. Compared with the traditional cutting method, it can effectively improve the production efficiency and production quality of the product, and the external setting of the heating wire can be convenient for installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the hot cutting device of the present application.

[0020] Figure 2 It is a schematic diagram of the structure of the cutting knife in this application.

[0021] Figure 3 This is a simplified structural diagram of the heating wire installed on the cutting knife in this application.

[0022] Figure 4 This is a schematic diagram of a partial cross-sectional structure of one example of a cutting knife in this application.

[0023] Figure 5 It is a schematic diagram of the partial cross-sectional structure of another example of the cutting knife in the present application.

[0024] In the figure: the hot cutting device 3, the mounting seat 31, the displacement device 32, the connecting plate 33, the cutting knife 34, the mounting groove 340, the fixing block 341, the threading hole 3410, the connecting port 3411, the heating wire 500, the housing 510, the resistance wire 520, and the filling material 530. DETAILED DESCRIPTION

[0025] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0028] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0029] One aspect of the present application provides a hot cutting device, wherein a preferred embodiment is as follows Figure 1As shown. The hot cutting device 3 includes a mounting seat 31, a displacement device 32, a cutting knife 34 and a heating wire 500. The entire hot cutting device 3 is fixedly installed by the mounting seat 31, the displacement device 32 is installed on the mounting seat 31 according to the set angle position, and the cutting knife 34 is installed on the output end of the displacement device 32 as the cutting end of the hot cutting device 3; the cutting knife 34 can be externally installed with the heating wire 500 to form an external hot cutting structure. When it is necessary to cut the edge waste of the blank, the cutting knife 34 can be driven by the displacement device 32 to move toward the position of the blank until the cutting end of the cutting knife 34 presses the edge waste of the blank, and the heating wire 500 can melt and cut the waste edge by heating it with electricity.

[0030] It is understandable that the hot cutting device 3 of the present application cooperates with the cutting knife 34 and the heating wire 500 to achieve hot melt cutting of the blank. Compared with the traditional method of cutting with a blade, the present application can automatically achieve melting edge sealing after completing the cutting of the waste edge of the blank, so that the edge contour of the product is smooth, thereby effectively improving the production quality of the product. In addition, the present application has relatively low requirements for the design accuracy and subsequent maintenance of the device through hot melt cutting, while ensuring the cutting production life, it can also effectively reduce production costs. At the same time, external installation of the heating wire 500 can facilitate subsequent maintenance.

[0031] It should be known that the edge profile of the blank is not necessarily straight and horizontal. For edge profiles of different shapes and inclination angles, a cutting knife 34 with a corresponding angle can be set for cutting. One end of the mounting seat 31 can be fixedly installed by fasteners such as bolts, and the other end of the mounting seat 31 can be set with a mounting plane with a corresponding inclination angle according to the cutting position of the blank corresponding to the hot cutting device 3. The displacement device 32 can be stably mounted on the mounting plane of the mounting seat 31 by fasteners. The specific structure and working principle of the displacement device 32 are well known to those skilled in the art, so they will not be elaborated in detail here; common displacement devices 32 include linear motors, cylinders, hydraulic cylinders, etc., and hydraulic cylinders are preferably used in this embodiment.

[0032] Specifically, Figure 1 and Figure 2 As shown, in order to facilitate the installation of the cutting knife 34, a connecting plate 33 is installed at the output end of the displacement device 32, and the cutting knife 34 can be detachably fixed to the connecting plate 33 through a fixing block 341 arranged on the side away from the cutting direction, thereby facilitating the installation and replacement of the cutting knife 34 without hindering the cutting by the cutting knife 34.

[0033] Another aspect of the present application provides an external heat-cut structure, such as Figures 2 to 5As shown, one of the preferred embodiments includes a cutting knife 34 and a heating wire 500; the cutting knife 34 can contact and press the edge waste of the blank to be cut through the cutting end, and the heating wire 500 can be externally installed on one end of the cutting knife 34 to form the required cutting end, and then the waste edge of the blank is hot-melted and cut off by electric heating of the heating wire 500.

[0034] In this embodiment, Figure 2 , Figure 4 and Figure 5 As shown, a sharp corner is provided on one side of the cutting blade 34, and the cutting blade 34 can be pressed against the edge of the blank through the sharp corner position, and then the edge waste of the blank is melted and cut by heating the sharp corner position. The sharp corner can be conveniently used to concentrate heat, so that while hot cutting of the blank is achieved, the heating power can be reduced to reduce the waste of resources. In addition, the setting of the sharp corner can also improve the accuracy of cutting the edge waste of the blank, so as to further improve the position cutting accuracy and cutting quality of the edge waste of the blank.

[0035] It can be understood that the heating wire 500 is installed at the sharp angle position of the cutting knife 34 to form the required cutting end; so that when hot cutting the waste edge of the blank is performed, the cutting knife 34 can be directly pressed against the edge of the blank through the heating wire 500 at the sharp angle position, and then the waste edge of the blank can be directly melted and cut by the electric heating of the heating wire 500.

[0036] Specifically, Figure 4 and Figure 5 As shown, the cutting blade 34 is provided with a concave mounting groove 340 at the angle position, and the heating wire 500 can be stably mounted outside the sharp corner of the cutting blade 34 through the mounting groove 340. The specific structural setting of the mounting groove 340 can be specifically designed according to the structural shape of the cutting blade 34.

[0037] If the sharp corner extension structure of the cutting knife 34 is a straight structure, that is, the edge of the blank cut by the cutting knife 34 is a straight line segment; then the mounting grooves 340 can be evenly distributed along the extension direction of the sharp corner of the cutting knife 34, that is, Figure 2 Of course, the mounting groove 340 can also be a two-section structure arranged on both sides of the sharp corner of the cutting knife 34, and then the heating wire 500 is engaged with the mounting grooves 340 on both sides of the sharp corner to achieve positioning and tensioning.

[0038] If the pointed extension structure of the cutting blade 34 is a non-straight structure, such as an arc or a broken line, in order to ensure that the heating wire 500 heats the blank stably, the mounting grooves 340 must be evenly distributed along the extension direction of the pointed angle.

[0039] It should be known that the depth of the mounting groove 340 should not be too deep. If the mounting groove 340 is too deep, the height of the heating wire 500 exposed from the mounting groove 340 will be shorter, and the side of the mounting groove 340 will easily interfere with the blank when the waste edge of the blank is cut, thereby affecting the molding quality of the blank. Of course, the depth of the mounting groove 340 should not be too shallow. If the mounting groove 340 is too shallow, the installation of the heating wire 500 will be unstable, and when the blank is hot-cut, the heating wire 500 and the mounting groove 340 will be easily separated when the heating wire 500 and the blank are squeezed, so that the cutting position of the heating wire 500 deviates and causes waste. Therefore, in this embodiment, the depth X of the mounting groove 340 is 20% to 60% of the cross-sectional width of the heating wire 500, preferably 40% to 50% of the cross-sectional width of the heating wire 500.

[0040] In this embodiment, Figure 3 As shown, when installing the heating wire 500, after the heating wire 500 is installed in the installation groove 340 at the sharp corner of the cutting knife 34, the wire end of the heating wire 500 can be penetrated by the fixing block 341 set on the other side of the cutting knife 34, and then the wire end of the heating wire 500 can be protected to avoid affecting the power supply of the heating wire 500.

[0041] Specifically, Figure 3 As shown, the fixing block 341 is provided with a threading hole 3410 that penetrates along the extending direction of the sharp corner of the cutting knife 34, and a connecting port 3411 that is perpendicular to the threading hole 3410. One end of the connecting port 3411 is connected to the middle of the threading hole 3410, and the other end is connected to the outside. Therefore, when installing the heating wire 500, the two ends of the heating wire 500 can extend into the threading hole 3410 at the ends of the threading holes 3410 corresponding to the sharp corners of the cutting knife 34, and then pass through the connecting port 3411 together to achieve circuit connection. By providing the threading hole 3410, the heating wire 500 can be protected on the one hand, and the heating wire 500 can be restrained on the other hand to ensure the stable installation of the heating wire 500.

[0042] In this embodiment, there are many specific structures of the heating wire 500. For ease of understanding, two specific examples will be used for detailed description below.

[0043] Example 1: Figure 4 As shown, if the cutting blade 34 is made of insulating material, the heating wire 500 can directly use the resistance wire 520. The cutting blade 34 made of insulating material can avoid interference with the power supply of the resistance wire 520, and the resistance wire 520 directly contacts the blank to improve the heat transfer efficiency.

[0044] It should be known that the cutting blade 34 may be made of a variety of insulating materials, with ceramic being a common example.

[0045] Example 2: Figure 5 As shown, if the cutting blade 34 is made of non-insulating material, the heating wire 500 may include a shell 510, a resistance wire 520 and a filler 530. The resistance wire 520 is arranged inside the shell 510, and the shell 510 is filled with a filler 530 having good thermal conductivity and insulation, so that the resistance wire 520 is positioned in the shell 510 by the filler 530 and is spaced from the shell 510, thereby preventing the metal shell 510 from affecting the electrification of the resistance wire 520.

[0046] It should be known that there are many types of fillers 530 with good thermal conductivity and insulation, and common ones include aluminum oxide powder, aluminum nitride powder, silicon nitride powder, etc. The filler 530 in powder form is not only convenient for filling, but also can stably position the resistance wire 520 by pressing.

[0047] In this embodiment, the cross-sectional shape of the heating wire 500 is various, for example Figure 4 As shown, the cross-sectional shape of the heating wire 500 is circular, and the cross-sectional shape of the corresponding mounting groove 340 is arc-shaped; the heating wire 500 with a circular cross-sectional shape is generally used in the case of a smaller cross-sectional size, so that the heating wire 500 can be used as the sharp corner of the cutting knife 34. Figure 5 As shown, the cross-sectional shape of the heating wire 500 has sharp corners, such as a triangle, and the corresponding cross-sectional shape of the installation groove 340 is a trapezoid, so as to ensure the structural stability of the heating wire 500 after installation. Then, the heating wire 500 can be directly pressed against the edge of the blank through its own sharp corners and complete the hot melt cutting.

[0048] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. An external hot-cut structure, characterized in that: It includes a cutting knife and a heating wire; the cutting knife is suitable for contacting and pressing the edge waste of the blank to be cut through the cutting end, and the heating wire is arranged outside one end of the cutting knife to form the cutting end, and then the waste edge of the blank is hot-melted and cut off by electrical heating of the heating wire.

2. The external hot-cut structure according to claim 1, characterized in that: The cutting blade is provided with a sharp corner, and the heating wire is installed at the sharp corner position of the cutting blade to form the cutting end.

3. The external hot-cut structure according to claim 2, characterized in that: The cutting knife is provided with a mounting groove at the sharp corner, and the heating wire is suitable for being mounted in cooperation with the mounting groove.

4. The external hot-cut structure according to claim 3, characterized in that: The mounting groove is arranged to penetrate along the extending direction of the sharp corner of the cutting knife.

5. The external heat-cutting structure according to claim 3, characterized in that: The extending direction of the sharp corner of the cutting knife is straight, and the mounting groove has two sections and is respectively arranged on both sides of the sharp corner of the cutting knife.

6. The external heat-cut structure according to claim 3, characterized in that: The depth of the installation groove is 20% to 60% of the cross-sectional size of the heating wire.

7. The external hot-cut structure according to any one of claims 1 to 6, characterized in that: The cutting knife is made of insulating material, and the heating wire is directly made of resistance wire.

8. The external hot-cut structure according to any one of claims 1 to 6, characterized in that: The heating wire comprises a shell, a resistance wire and a filler; the resistance wire is arranged in the shell and is spaced apart from the shell by the filler; the shell is made of metal, and the filler is made of a heat-conducting insulating material.

9. The external hot-cut structure according to claim 1, characterized in that: The cross-sectional shape of the heating wire is circular; or, the cross-sectional shape of the heating wire has a sharp corner, and the heating wire is suitable for hot-melt cutting the blank at the sharp corner.

10. A hot cutting device, characterized in that: It includes a fixed seat, a displacement device, a cutting knife and a heating wire; the fixed seat is fixedly arranged, the displacement device is installed on the fixed seat, the cutting knife and the heating wire are matched with the external hot cutting structure described in any one of claims 1 to 9 and are installed on the output end of the displacement device, and then the cutting knife drives the heating wire to perform hot-melt cutting of the waste edge of the blank under the drive of the displacement device.

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