Bottom die assembly

Abstract

The utility model discloses a bottom die assembly which comprises a first bottom die and a second bottom die which are arranged in a stacked mode, the first bottom die is provided with a plurality of through wire pressing grooves, and the first bottom die and the second bottom die are made of metal. The bottom die assembly has the following beneficial effects that (1) under the condition that the thickness of the first bottom die is determined, low-cost common laser can be adopted for engraving, so that the machining cost is greatly reduced, and the machining efficiency is improved; and (2) the first bottom die and the second bottom die are both made of metal materials, and the die-cutting-resistant number can reach more than 15,000,000. And (3) after the die-cutting-resistant number is reached, the first bottom die can be directly replaced, so that the platemaking cost of the die-cutting assembly can be further reduced. And (4) due to the gap between the first bottom die and the second bottom die, the paper powder is easy to transfer into the gap under the action of pressure and vibration generated by die cutting operation, so that the blocking frequency of the wire pressing groove is reduced, and after the wire pressing groove is blocked, the paper powder can be easily removed after the first bottom die and the second bottom die are separated.

Description

Technical Field

[0001] The utility model relates to the technical field of die-cutting plates, in particular to a bottom die assembly. Background Art

[0002] The die-cutting plate used for die-cutting packaging materials includes a surface die and a bottom die. Figure 1 The bottom mold of the packaging box shown needs to be set as follows Figure 2 The wire groove shown is used to assist wire forming. The existing base mold includes two types: the first is the traditional base mold, which includes a base plate and a wire groove fixed to the base plate by glue. The base plate is made of a flat metal material, and the wire groove is made of a resin material. The traditional base mold has the problem of low die-cutting resistance. When the cutting quantity exceeds 300,000 sheets, the wire groove needs to be replaced. For large-volume orders, frequent replacement of the wire groove will lead to reduced die-cutting efficiency. The second type is an improved base mold. The improved base mold is obtained by directly engraving a wire groove of a predetermined depth on the metal base plate. The improved base mold has two problems: first, the wire groove processing cost is high and the processing efficiency is low. Since the wire groove has high requirements for processing accuracy, it cannot be engraved using a low-cost ordinary laser. Although femtosecond laser can be used to engrave the wire groove, its processing cost is extremely high. In reality, the wire groove is engraved using a relatively low-cost CNC engraving machine. The processing time of a single base mold takes about 20 hours, and the processing cost is still very high. Secondly, the wire groove is easily clogged by paper dust, and it is difficult to remove the paper dust after clogging. Utility Model Content

[0003] Based on this, it is necessary to provide a bottom mold assembly to solve the above problems.

[0004] A bottom mold assembly includes a first bottom mold and a second bottom mold that are stacked. The first bottom mold is provided with a plurality of penetrating wire pressing grooves. The first bottom mold and the second bottom mold are made of metal.

[0005] In one embodiment, the metal is steel.

[0006] In one embodiment, the wire pressing groove is obtained by laser engraving.

[0007] In one embodiment, the first bottom mold and the second bottom mold are detachably connected.

[0008] In one embodiment, the thickness of the first bottom mold is 0.2 mm-1 mm.

[0009] In one embodiment, the width of the wire pressing groove is 0.8 mm-1.6 mm.

[0010] In one embodiment, both ends of the wire pressing groove are rounded.

[0011] In one embodiment, the thickness of the second bottom mold is 0.8 mm to 1.2 mm.

[0012] In one embodiment, the sum of the thicknesses of the first bottom mold and the second bottom mold is 1.3 mm to 1.6 mm.

[0013] In one embodiment, a reinforcement structure is provided in the fragile area of the first bottom mold.

[0014] The above-mentioned bottom die assembly has the following beneficial effects: (1) Since the first bottom die is an independent component, it can be engraved with a low-cost ordinary laser when the thickness is determined, thereby significantly reducing processing costs and improving processing efficiency. (2) Both the first bottom die and the second bottom die are made of metal materials, and their die-cutting capacity can reach more than 15 million sheets. (3) After the die-cutting capacity is reached, the first bottom die can be directly replaced, which can further reduce the plate making cost of the die-cutting assembly. (4) Since there is a gap between the first bottom die and the second bottom die, under the pressure and vibration generated by the die-cutting operation, paper dust is easily transferred into the gap, thereby reducing the frequency of the wire groove being blocked. After the wire groove is blocked, the paper dust can be easily removed by separating the first bottom die from the second bottom die. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a packaging box in the prior art;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the bottom mold in the prior art;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of a bottom mold assembly according to one embodiment;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the bottom mold assembly in another embodiment. DETAILED DESCRIPTION

[0019] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" or "communicating" with another element, it may be directly connected to the other element or there may be an intermediate element. The terms "upper," "lower," "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0021] The bottom mold assembly will be further described in detail below mainly in conjunction with the accompanying drawings and specific embodiments.

[0022] See also Figure 3 A bottom mold assembly according to one embodiment includes a first bottom mold 10 and a second bottom mold 20 that are stacked.

[0023] The first bottom mold 10 is made of metal. Metal has excellent hardness and toughness, so choosing metal as the first bottom mold 10 significantly increases the die-cutting capacity of the first bottom mold 10. The first bottom mold 10 is provided with a plurality of crimping grooves 11 extending through the first bottom mold 10. The crimping grooves 11 are used to form the fold lines of the packaging box.

[0024] Optionally, the metal material includes but is not limited to: steel, iron, aluminum or copper.

[0025] Preferably, the metal material is steel, which has the characteristics of high hardness and low price. Choosing steel as the material for preparing the first bottom mold 10 is beneficial to increasing the die-cutting resistance of the first bottom mold 10 and reducing the preparation cost of the first bottom mold 10.

[0026] Optionally, the thickness of the first bottom mold 10 is 0.2 mm to 1 mm. By defining the thickness of the first bottom mold 10, the depth of the creasing groove 11 can be determined. If the creasing groove 11 is too deep, the packaging material may be easily broken during the die-cutting process. If the creasing groove 11 is too shallow, the creasing effect of the creasing line may be affected after die-cutting, thereby affecting the forming of the packaging box.

[0027] Preferably, the thickness of the first bottom mold 10 is 0.4mm-0.6mm. The first bottom mold 10 made of material with this thickness has a depth of the wire pressing groove 11 that can meet the folding effect after die-cutting of 200g-400g cardboard material, and has a wide range of uses.

[0028] Preferably, both ends of the wire crimping groove 11 are rounded. By setting the rounded corners, it is beneficial to reduce the stress concentration formed on the material of the first bottom mold 10 at both ends of the wire crimping groove 11, thereby improving the die-cutting resistance of the first bottom mold 10.

[0029] Optionally, the width of the crimping groove 11 is 0.8 mm to 1.6 mm. The width of the crimping groove 11 in the above range can meet the folding effect of 200 g to 400 g cardboard materials after die-cutting, and has a wide range of uses.

[0030] Optionally, the wire pressing groove 11 is obtained by laser engraving.

[0031] Preferably, the wire pressing groove 11 is obtained by ordinary laser engraving. Although ordinary laser has the problem of low precision, its engraving cost is low and the engraving efficiency is high. When the thickness of the first bottom mold 10 is determined, there is no need to consider the engraving accuracy of the wire pressing groove 11 in depth. It is only necessary to etch through the first bottom mold 10. According to experimental tests, ordinary laser can complete the engraving work of a first bottom mold 10 in about 10 minutes.

[0032] In this embodiment, the edges of the first bottom mold 10 and the second bottom mold 20 are provided with a plurality of matching first fixing holes 12 , and bolts are provided in the first fixing holes 12 to achieve a detachable connection between the first bottom mold 10 and the second bottom mold 20 .

[0033] It should be understood that the connection between the first bottom mold 10 and the second bottom mold 20 may also be a fixed connection, and the fixed connection method includes but is not limited to welding.

[0034] In another embodiment, see Figure 4 A reinforcement structure is provided in the fragile area of the first bottom mold 10.

[0035] Specifically, due to the cutting effect of the wire pressing groove 11, a part of the first bottom mold 10 is connected to the main body of the first bottom mold 10 only through a few parts, forming a fragile area, such as Figure 4 As shown, area A is surrounded by four crimping grooves 11, making it a vulnerable area in terms of structural strength. During the die-cutting process, under the tremendous pressure and impact, the vulnerable area is easily deformed or even detached from the first bottom die 10, which would cause serious damage to the die-cutting equipment. In the illustrated embodiment, second fixing holes 13 are provided at corresponding positions in the vulnerable area and the second bottom die 20, and bolts are installed in the second fixing holes 13 to form a reinforcement structure, thereby preventing this area from deforming or even detaching from the first bottom die 10.

[0036] The second bottom die 20 is stacked below the first bottom die 10. This flat plate is used to secure the first bottom die 10 and seal the bottom of the wire crimping groove 11. The second bottom die 20 is made of metal. This significantly increases the die-cutting capacity of the second bottom die 20.

[0037] Optionally, the metal material includes but is not limited to: steel, iron, aluminum or copper.

[0038] Preferably, the metal material is steel, which has the characteristics of high hardness and low price. Choosing steel as the material for preparing the second bottom mold 20 is beneficial to increasing the die-cutting resistance of the second bottom mold 20 and reducing the preparation cost of the second bottom mold 20.

[0039] Optionally, the thickness of the second bottom mold 20 is 0.8 mm to 1.2 mm. By limiting the thickness of the second bottom mold 20 , it is beneficial to control the material cost of the second bottom mold 20 .

[0040] Preferably, the sum of the thicknesses of the first bottom mold 10 and the second bottom mold 20 is 1.3mm-1.6mm. Since the thickness of the traditional bottom mold is 1.5mm, this thickness is close to the thickness of the traditional bottom mold, which can reduce the adjustment time after plate loading and thus improve plate loading efficiency.

[0041] During die-cutting operation, the packaging material is arranged between the bottom die assembly and the surface die, and under the extrusion of the creasing groove 11 and the creasing line, a creasing line is formed on the packaging material, so that the packaging material can be folded through the creasing line.

[0042] The above-mentioned bottom die assembly has the following beneficial effects: (1) Since the first bottom die 10 is an independent component, it can be engraved with a low-cost ordinary laser when the thickness is determined, thereby significantly reducing processing costs and improving processing efficiency. (2) The first bottom die 10 and the second bottom die 20 are both made of metal materials, and their die-cutting capacity can reach more than 15 million sheets. (3) After the die-cutting capacity is reached, the first bottom die 10 can be directly replaced, which can further reduce the plate making cost of the die-cutting assembly. (4) Since there is a gap between the first bottom die 10 and the second bottom die 20, under the pressure and vibration generated by the die-cutting operation, paper dust is easily transferred into the gap, thereby reducing the frequency of the wire pressing groove 11 being blocked. After the wire pressing groove 11 is blocked, the paper dust can be easily removed by separating the first bottom die 10 and the second bottom die 20.

[0043] The following are specific examples.

[0044] Example 1

[0045] Please refer to 3. This embodiment provides a bottom mold assembly, including a first bottom mold 10 and a second bottom mold 20 that are stacked. The first bottom mold 10 is provided with a plurality of penetrating wire pressing grooves 11. The material of the first bottom mold 10 and the second bottom mold 20 is steel.

[0046] In this embodiment, a plurality of first fixing holes 12 are provided at the edges of the first bottom mold 10 and the second bottom mold 20 , and the first bottom mold 10 and the second bottom mold 20 are detachably connected by providing bolts in the first fixing holes 12 .

[0047] The above-mentioned bottom die assembly has the following beneficial effects: (1) Since the first bottom die 10 is an independent component, it can be engraved with a low-cost ordinary laser when the thickness is determined, thereby significantly reducing processing costs and improving processing efficiency. (2) The first bottom die 10 and the second bottom die 20 are both made of metal materials, and their die-cutting capacity can reach more than 15 million sheets. (3) After the die-cutting capacity is reached, the first bottom die 10 can be directly replaced, which can further reduce the plate making cost of the die-cutting assembly. (4) Since there is a gap between the first bottom die 10 and the second bottom die 20, under the pressure and vibration generated by the die-cutting operation, paper dust is easily transferred into the gap, thereby reducing the frequency of the wire pressing groove 11 being blocked. After the wire pressing groove 11 is blocked, the paper dust can be easily removed by separating the first bottom die 10 and the second bottom die 20.

[0048] Example 2

[0049] See also Figure 4 The bottom mold assembly provided in this embodiment is similar to the bottom mold assembly provided in Example 1, except that a plurality of second fixing holes 13 are provided at the fragile area A of the first bottom mold 10 and the corresponding positions of the second bottom mold 20, and bolts are provided in the second fixing holes 13.

[0050] The above-mentioned bottom mold assembly is provided with second fixing holes 13 at corresponding positions of the fragile area and the second bottom mold 20, and the fragile area is reinforced with bolts to prevent the area from deforming or even falling off from the first bottom mold 10.

[0051] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A bottom mold assembly, characterized in that: It includes a first bottom mold and a second bottom mold that are stacked. The first bottom mold is provided with a plurality of penetrating wire pressing grooves. The first bottom mold and the second bottom mold are detachably connected. The material of the first bottom mold and the second bottom mold is metal.

2. The bottom mold assembly according to claim 1, characterized in that: The metal is steel.

3. The bottom mold assembly according to claim 2, characterized in that: The wire pressing groove is obtained by laser engraving.

4. The bottom mold assembly according to claim 1, characterized in that The thickness of the first bottom mold is 0.2mm-1mm.

5. The bottom mold assembly according to claim 1, characterized in that: The width of the wire pressing groove is 0.8mm-1.6mm.

6. The bottom mold assembly according to claim 1, characterized in that: Both ends of the wire pressing groove are rounded.

7. The bottom mold assembly according to claim 1, characterized in that: The thickness of the second bottom mold is 0.8mm-1.2mm.

8. The bottom mold assembly according to any one of claims 1 to 7, characterized in that: The sum of the thicknesses of the first bottom mold and the second bottom mold is 1.3 mm to 1.6 mm.

9. The bottom mold assembly according to claim 8, characterized in that: The fragile area of the first bottom mold is provided with a reinforcement structure.

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