Reverse cutting die

Abstract

The utility model relates to the technical field of die structures, in particular to a reverse cutting die, which comprises a cutting die plate arranged on a die cutting machine. The front cutter is arranged on the cutter template, and a front cutter edge is formed on the front cutter; the reverse cutter is arranged on the die cutting machine, and a reverse cutter edge is formed on the reverse cutter; a forward cutting procedure and a reverse cutting procedure are carried out at the same time by arranging a forward cutter and a reverse cutter which are detachably connected on a cutter template, specifically, the forward cutter is arranged on the cutter template, the reverse cutter is matched with the forward cutter, and the reverse cutter is arranged on a die-cutting machine; the forward cutter and the reverse cutter are meshed with each other on the paper box to form a corresponding cutting area, it can be understood that the forward cutter edge is smaller than the reverse cutter edge and protrudes relatively, an installation space of an anti-fake buckle can be formed at a time, the anti-fake buckle can be prevented from protruding during installation, and the problem that in the prior art, an anti-fake buckle cutting die cannot form a semi-through hole at a time is solved.

Description

Technical Field

[0001] This utility model relates to the field of mold structure technology, and in particular to a reverse cutting die. Background Technology

[0002] Packaging boxes require creases and seams to be formed on the front, and the patterns to be formed on the back of the box. This is usually done in two steps: reverse cutting is one process and forward cutting is another. Currently, the bottom mold and reverse cutting blade are installed separately on two machines, making it impossible to form the boxes in one step.

[0003] Furthermore, in the manufacturing of paper packaging boxes (such as wine boxes and gift boxes), the products are mainly assembled by laminating grey board substrate with printed colored surfaces. The traditional process requires first making a die-cutting mold according to the box size, then pressing and cutting the grey board into shape using a die-cutting machine, and finally bonding it with the colored surface. Among them, the anti-counterfeiting buckle is a key structure of the packaging box and usually has a specific thickness to achieve the anti-counterfeiting function. However, this design causes a height difference between the local protrusion of the grey board (anti-counterfeiting buckle area) and the flat area, making the surface of the finished product uneven, which seriously affects the aesthetics and sealing performance.

[0004] The industry once adopted a "secondary die-cutting" solution: that is, secondary processing on the back of the gray board to cut off the base layer of the area corresponding to the anti-counterfeiting buckle to form a recess. However, this process has significant defects - the front outline of the first die-cutting and the back recess of the second die-cutting are difficult to align precisely. Due to positioning errors, the front and back dimensions are misaligned, causing the product qualification rate to plummet to below 60%. At the same time, secondary die-cutting requires additional processes, which extends the production time of a single batch by about 10 minutes, significantly dragging down efficiency and increasing tool wear costs. Utility Model Content

[0005] The main purpose of this utility model is to provide a reverse cutting die, which aims to solve the problem that the anti-counterfeiting buckle die cannot be formed into a semi-perforated shape in one step in the prior art.

[0006] To achieve the above objectives, this utility model provides a reverse cutting die, the reverse cutting die comprising:

[0007] A die-cutting template, which is mounted on a die-cutting machine;

[0008] A cutting blade, wherein the cutting blade is disposed on the blade template and a cutting edge is formed on the cutting blade;

[0009] A reverse cutting blade is provided on the die-cutting machine, and a reverse cutting edge is formed on the reverse cutting blade;

[0010] The positive and negative cutting blades work together on the cardboard placed on the die-cutting machine to form a cutting area. The cutting area corresponding to the positive blade cuts through the front side, while the cutting area corresponding to the negative blade cuts through the back side.

[0011] Optionally, the die template is provided with a die holder, and the slitting blade is detachably connected to the die holder.

[0012] Optionally, the forward cutting blade has a cutting groove, and a plurality of positioning pins are provided in the cutting groove. The reverse cutting blade has positioning holes that match the positioning pins.

[0013] Optionally, an adsorption component is provided on the back of the reverse cutting blade, which is used to fix the reverse cutting blade in the die-cutting machine.

[0014] Optionally, the adsorption component includes double-sided adhesive.

[0015] Optionally, the cutting blade is provided with a feeding assembly for separating the cut cardboard.

[0016] Optionally, the feeding assembly includes a pulling member and an ejector member, wherein the pulling member includes an elastic rod connected to the bottom of the cutting groove.

[0017] Optionally, the end of the elastic rod is provided with a pulling head, and a plurality of toothed pins are provided on the side of the pulling head away from the groove.

[0018] Optionally, a buffer pad is also provided on the cutting template.

[0019] Optionally, the adsorption assembly includes a reed switch, an ejector rod, and an ejector switch. The reed switch is disposed inside the die template and connected to the ejector switch. An ejector spring is disposed inside the ejector rod. When the die-cutting machine engages, the ejector rod is compressed and the ejector switch is closed. When the die-cutting machine disengages, the ejector switch is opened, causing the ejector rod to pop out and separate the cut cardboard connected to the pull head.

[0020] This utility model proposes a reverse cutting die, which performs two cutting processes simultaneously by setting a detachably connected forward cutting blade and a reverse cutting blade on the die template. Specifically, a forward cutting blade is set on the die template, and the reverse cutting blade cooperates with the forward cutting blade. The reverse cutting blade is set on the die-cutting machine. When the die-cutting machine bites, the forward cutting blade and the reverse cutting blade bite together on the cardboard to form corresponding cutting areas. It can be understood that the forward cutting edge is smaller and relatively protruding than the reverse cutting edge, so the cutting is a direct cut through the front side. However, when the reverse cutting edge bites with the forward cutting blade, there is a certain gap displacement, so the cutting is a partial cut through the reverse side. Therefore, the two cutting processes are completed in the same process, and the installation space of the anti-counterfeiting buckle can be formed in one step to avoid the protrusion when the anti-counterfeiting buckle is installed. This solves the problem that the anti-counterfeiting buckle die cannot form a partial hole in one step in the prior art. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure in Embodiment 1 of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the tangent and the tangent template in Embodiment 1 of this utility model;

[0023] Figure 3 This is a schematic diagram of the reverse cutting blade in Embodiment 1 of this utility model;

[0024] Figure 4 A schematic diagram of the structure of the tangent and the template in Embodiment 2 of this utility model;

[0025] Figure 5 This is an enlarged structural diagram of A in Embodiment 2 of this utility model;

[0026] Figure 6 This is a schematic diagram of the ejector component in Embodiment 2 of this utility model;

[0027] Figure 7 This is a schematic diagram of the internal structure of the ejector component in Embodiment 2 of this utility model.

[0028] Figure label:

[0029] 1-Drill template, 2-Forward cutting blade, 3-Reverse cutting blade, 4-Forward cutting edge, 5-Reverse cutting edge, 6-Drill mold base, 7-Cutting groove, 8-Positioning pin, 9-Positioning hole, 10-Adsorption assembly, 11-Unloading assembly, 12-Pull component, 13-Ejector component, 14-Elastic rod, 15-Pull head, 16-Toothed nail, 17-Buffer pad, 18-Ejector rod, 19-Ejector switch, 20-Ejector spring.

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] Example 1:

[0036] Please refer to the attached document as well. Figures 1 to 3 This embodiment provides a reverse cutting blade 3-die, which includes:

[0037] Die template 1, which is mounted on a die-cutting machine;

[0038] A cutting blade 2 is disposed on the blade template 1, and a cutting edge 4 is formed on the cutting blade 2;

[0039] A reverse cutting blade 3 is disposed on the die-cutting machine, and a reverse cutting edge 5 is formed on the reverse cutting blade 3;

[0040] The forward cutting blade 2 and the reverse cutting blade 3 work together on the cardboard placed on the die-cutting machine to form a cutting area. The cutting area corresponding to the forward cutting edge 4 cuts through the front side, and the cutting area corresponding to the reverse cutting edge 5 cuts through the back side.

[0041] It should be noted that the packaging box needs to be formed with creases and seams on the front, and the pattern is formed on the back of the box. This is done in two steps: reverse cutting is one process and forward cutting is another. The existing bottom mold and reverse cutting blade 3 are installed separately on two machines, so it is not possible to form the box in one step.

[0042] It should also be noted that, based on the above problems, this embodiment provides a reverse cutting die 3. By setting a detachably connected front cutting die 2 and a reverse cutting die 3 on the die template 1, two cutting processes, one for the front and one for the back, can be performed simultaneously. Specifically, a front cutting die 2 is set on the die template 1, and the reverse cutting die 3 cooperates with the front cutting die 2. The reverse cutting die 3 is set on the die-cutting machine. When the die-cutting machine bites, the front cutting die 2 and the reverse cutting die 3 bite each other on the cardboard box to form corresponding cutting areas. It can be understood that the front cutting edge 4 is smaller and relatively protruding than the reverse cutting edge 5, so the front side is cut directly through during cutting. However, when the reverse cutting edge 5 bites with the front cutting die 2, there is a certain gap displacement, so the reverse side is partially cut through during biting and cutting. Therefore, the two cutting processes, one for the front and one for the back, are completed in the same process, and the installation space for the anti-counterfeiting buckle can be formed in one step to avoid the protrusion when the anti-counterfeiting buckle is installed. This solves the problem that the anti-counterfeiting buckle die cannot be formed into a partial hole in one step in the prior art.

[0043] In this embodiment, a die holder 6 is provided on the die template 1, and the slitting blade 2 is detachably connected to the die holder 6.

[0044] In some embodiments, the slitting blade 2 is bolted to the die holder 6.

[0045] It is understandable that a detachable die holder 6 is installed on the die plate 1 of the die-cutting machine, and the forward cutting blade 2 is firmly installed on the die holder 6; at the same time, a reverse cutting blade 3 is independently installed at the corresponding position of the die-cutting machine. When the die-cutting machine performs the biting action, the forward cutting blade 2 and the reverse cutting blade 3 form a precise spatial fit. The smaller and relatively protruding forward cutting edge 4 on the forward cutting blade 2 directly penetrates the front of the cardboard, while the reverse cutting edge 5 on the reverse cutting blade 3 maintains a specific gap with the forward cutting blade 2, and only performs a semi-penetrating cut on the back of the cardboard.

[0046] In this embodiment, the forward cutting blade 2 has a cutting groove 7, and a plurality of positioning pins 8 are provided in the cutting groove 7. The reverse cutting blade 3 is provided with positioning holes 9 that match the positioning pins 8.

[0047] In some embodiments, the number of locating pins 8 is four.

[0048] Understandably, a groove 7 is formed inside the forward cutting blade 2, and several high-hardness alloy locating pins 8 are vertically fixed inside the groove; the corresponding position of the reverse cutting blade 3 is precisely machined with a tapered locating hole 9 that is interference-fitted with the diameter of the locating pin 8. When the die-cutting machine performs the biting action, the reverse cutting blade 3 actively approaches the forward cutting blade 2 under mechanical pressure. At this time, the tip of the locating pin 8 first enters the tapered locating hole 9 of the reverse cutting blade 3. As the biting depth increases, the pin body and the hole wall form a progressive tight fit.

[0049] In this embodiment, an adsorption component 10 is provided on the back side of the reverse cutting blade 3, and the adsorption component 10 is used to fix the reverse cutting blade 3 in the die-cutting machine.

[0050] It should be noted that the front contour of the first die-cut and the back recess of the second die-cut are difficult to align precisely. This positioning error leads to dimensional misalignment between the front and back, causing the product yield to plummet to below 60%. It should also be noted that...

[0051] In some embodiments, the adsorption component 10 includes double-sided adhesive. Before the first die-cutting, the double-sided adhesive on the back of the reverse cutting blade 3 needs to be removed, and then the reverse cutting blade 3 is put into contact with the forward cutting blade 2. The die-cutting machine is started for air cutting. During the air cutting process, the reverse cutting blade 3 is adsorbed onto the bottom steel plate of the die-cutting machine by the double-sided adhesive. In this process, the disordered and complex mechanical structure can achieve precise positioning of the forward cutting blade 2 and the reverse cutting blade 3, thus solving the problem of the forward cutting blade 2 and the reverse cutting blade 3.

[0052] Example 2:

[0053] Please refer to the attached document as well. Figures 4 to 7 In this embodiment, only the parts that differ from Embodiment 1 are described. Specifically, the cutting blade 2 is provided with a feeding component 11, which is used to separate the cut cardboard.

[0054] It should be noted that the above structure effectively alleviates the problem of half-pierced waste sticking in the die-cutting process. Specifically, a pulling component 12, consisting of an elastic rod 14, a pulling head 15, and toothed spikes 16, is embedded inside the forward cutting blade 2. The tail of the elastic rod 14 is connected to a pre-compressed ejector spring 20 and extends to the bottom of the cutting groove 7. When the die-cutting machine performs the biting action, the die-cutting plate drives the reverse cutting blade 3 to press against the cardboard. At this time, the ejector rod 18 is forced to compress the internal spring to store energy, and the pulling head 15 is pressed into the cutting groove 7. The 15° inclined stainless steel toothed spikes 16 on its surface pierce the half-pierced layer of the cardboard. When the die-cutting machine starts after cutting, the displacement of the die-cutting plate triggers the reed switch magnetic control switch, releasing the ejector lock. The compressed ejector spring 20 rapidly releases energy to push the ejector rod 18 upward. At this time, the elastic rod 14 generates a two-way action under the transmission of kinetic energy: the longitudinal ejection force causes the toothed spikes 16 to carry the half-pierced waste vertically away, thereby achieving the purpose of separating the waste cardboard.

[0055] In this embodiment, the feeding assembly 11 includes a pulling member 12 and an ejector member 13. The pulling member 12 includes an elastic rod 14 connected to the bottom of the cutting groove 7.

[0056] In some embodiments, the elastic rod 14 consists of an elastic outer cylinder and an elastic inner rod, and a spring is also provided inside to achieve elastic displacement.

[0057] In this embodiment, the end of the elastic rod 14 is provided with a pulling head 15, and a plurality of toothed nails 16 are provided on the side of the pulling head 15 away from the groove 7.

[0058] In some embodiments, the plurality of toothed pins 16 are preferably arranged in a plurality of pin arrays.

[0059] In some embodiments, the pull head 15 is a hemispherical structure.

[0060] In this embodiment, a buffer pad 17 is also provided on the blade template 1.

[0061] In some embodiments, the cushioning pad 17 is preferably made of a plastic material, such as polyurethane.

[0062] In this embodiment, the adsorption assembly 10 includes a reed switch, an ejector rod 18, and an ejector switch 19. The reed switch is disposed inside the die template 1 and connected to the ejector switch 19. An ejector spring 20 is disposed inside the ejector rod 18. When the die-cutting machine engages, the ejector rod 18 is compressed and the ejector switch 19 is closed. When the die-cutting machine disengages, the ejector switch 19 is opened, causing the ejector rod 18 to pop out and separate the cut cardboard connected to the pull head 15.

[0063] It is understandable that the reed switch is a magnetic switch, and the ejector switch 19 is preferably a structure such as a snap-fit ​​that can cooperate with each other. It is also understandable that a motor connected to the reed switch signal is installed inside the die template 1, and the output end of the motor is connected to the ejector switch 19. The reed switch is controlled by the electromagnet in the bottom steel plate of the die-cutting machine when it is closed or moved away, thereby realizing the reciprocating feeding process. Specifically, the ejector rod 18 on the back of the reverse cutting blade 3 is driven to retract under pressure, compressing the internal chromium silicon steel ejector spring 20 to a critical state. At this time, the reed switch is locked due to the magnetic circuit closure. When the die-cutting machine completes the cutting and begins to separate, the elastic potential energy stored in the buffer pad 17 is released in stages. First, the blade is safely separated; then, when the magnetic field induced by the reed switch weakens to the threshold, the circuit is automatically turned on, and the ejector switch 19 is unlocked; finally, the ejector spring 20 releases the stored energy, pushing the ejector rod 18 to hit the force transmission surface of the pulling head 15, and finally throwing the waste material away from the working area by inertia.

[0064] Example 3:

[0065] To make the technical solutions in this application clearer, the die-cutting machine used in the reverse cutting 3-die of this application is described herein. Preferably, the die-cutting machine includes:

[0066] A frame on which a drive assembly is mounted;

[0067] Template groove, and several of the reverse cutting blades 3 molds are disposed in the template groove;

[0068] A die-cutting plate is rotatably connected to the drive assembly and is used to realize the cutting process of the forward cutter 2 and the reverse cutter 3 through interlocking, wherein the back of the reverse cutter 3 is detachably connected to the die-cutting plate;

[0069] The adsorption component 10 includes an electromagnet disposed inside the die-cutting plate. The electromagnet during the die-cutting plate engagement process is used to control the opening and closing of the reed switch.

[0070] An array of electromagnets is embedded inside the die-cutting plate, with each electromagnet precisely aligned with the mounting position on the back of the reverse cutting blade 3. The electromagnet array can replace the structure of the adsorption components 10 such as double-sided tape. When the drive component drives the die-cutting plate to perform the biting action, the strong magnetic field penetrates the reverse cutting blade 3 and activates the reed switch in the blade template 1, causing its reed to close under the action of magnetic force to form a circuit. At this time, the ejector switch 19 enters the standby state. As the biting depth increases, the reverse cutting blade 3 presses the ejector rod 18 to compress the internal spring to store energy.

[0071] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A reverse cutting die, characterized in that, The reverse cutting die includes: A die-cutting template, which is mounted on a die-cutting machine; A cutting blade, wherein the cutting blade is disposed on the blade template and a cutting edge is formed on the cutting blade; A reverse cutting blade is provided on the die-cutting machine, and a reverse cutting edge is formed on the reverse cutting blade; The positive and negative cutting blades work together on the cardboard placed on the die-cutting machine to form a cutting area. The cutting area corresponding to the positive blade cuts through the front side, while the cutting area corresponding to the negative blade cuts through the back side.

2. The reverse cutting die as described in claim 1, characterized in that, The die template is provided with a die holder, and the slitting blade is detachably connected to the die holder.

3. The reverse cutting die as described in claim 1, characterized in that, The forward cutting blade has a cutting groove inside, and a plurality of positioning pins are provided in the cutting groove. The reverse cutting blade has positioning holes that match the positioning pins.

4. A reverse cutting die as described in claim 3, characterized in that, An adsorption component is provided on the back of the reverse cutting blade, which is used to fix the reverse cutting blade in the die-cutting machine.

5. A reverse cutting die as described in claim 4, characterized in that, The adsorption component includes double-sided adhesive.

6. A reverse cutting die as described in claim 4, characterized in that, The cutting blade is equipped with a feeding component, which is used to separate the cut cardboard.

7. A reverse cutting die as described in claim 6, characterized in that, The feeding assembly includes a pulling member and an ejector member, and the pulling member includes an elastic rod connected to the bottom of the cutting groove.

8. A reverse cutting die as described in claim 7, characterized in that, The end of the elastic rod is provided with a pulling head, and a number of toothed pins are provided on the side of the pulling head away from the groove.

9. A reverse cutting die as described in claim 6, characterized in that, The cutting template is also equipped with a buffer pad.

10. A reverse cutting die as described in claim 7, characterized in that, The adsorption assembly includes a reed switch, a ejector rod, and an ejector switch. The reed switch is disposed inside the die template and connected to the ejector switch. An ejector spring is disposed inside the ejector rod. When the die-cutting machine engages, the ejector rod is compressed and the ejector switch is closed. When the die-cutting machine disengages, the ejector switch is opened, causing the ejector rod to pop out and separate the cut cardboard connected to the pull head.

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