In-mold cutting structure

Abstract

The utility model relates to the technical field of paper plastic molds, in particular to an in-mold cutting structure which comprises an upper mold and a lower mold, the upper mold is connected with the lower mold in a lifting mode, the upper mold is provided with a punching mold cavity, and the lower mold is provided with a punching mold block matched with the punching mold cavity. The die-casting die further comprises a cutter and a cushion block which are arranged between the upper die and the lower die, the cutter is fixedly arranged on the upper die, the cushion block is fixedly arranged on the upper die, and the cushion block is located on the moving path of the cutter. Meanwhile, due to the fact that the cutter and the cushion block are fixedly arranged, tedious adjustment and calibration work does not need to be carried out before each time of cutting, time is saved, a production line can run more smoothly, errors caused by manual operation are avoided, and the percent of pass and the production efficiency of products are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of paper-plastic moulds, in particular to an in-mould cutting structure. Background Art

[0002] In today's manufacturing landscape, paper molds are a crucial forming tool, widely used in the production of a wide variety of products. Due to their low cost, ease of processing, and environmental friendliness, they have become a preferred choice across many industries. However, existing paper mold designs have a significant limitation: they typically lack cutting capabilities.

[0003] While using paper-plastic molds to form products can generally meet the product's shape and structural requirements, the resulting product is often only a semi-finished product. Because the molds themselves lack cutting mechanisms or corresponding cutting functions, excess plastic or paper material often remains on the edges of the product, failing to meet the final product's size and appearance requirements. Manufacturers often need to implement a separate cutting process after the paper-plastic mold forming process. This additional step not only increases the complexity and time costs of the production process, but also requires additional manpower, material, and financial resources. Utility Model Content

[0004] The purpose of the utility model is to provide an in-mold cutting structure to solve the problem of low efficiency caused by the separate cutting process in the prior art.

[0005] The technical solution of the utility model is: an in-mold cutting structure, including an upper mold and a lower mold, the upper mold is connected to the lower mold for lifting, the upper mold is provided with a punching die cavity, the lower mold is provided with a punching module that cooperates with the punching die cavity, and also includes a tool and a pad arranged between the upper mold and the lower mold, the tool is fixed to the upper mold, the pad is fixed to the upper mold, and the pad is located on the moving path of the tool.

[0006] Preferably, an upper groove is provided on the end surface of the upper mold, the tool protrudes relative to the upper mold toward the lower mold, a limiting member is built into the upper groove, and the tool is partially fixed in the upper groove through the limiting member.

[0007] Preferably, the end surface of the tool facing away from the lower mold abuts against the limiting member.

[0008] Preferably, the lower mold is provided with a lower groove, the pad is built into the lower groove, the end face of the pad is flush with the end face of the lower mold, and when the upper mold moves toward the lower mold, the protruding part of the tool relative to the upper mold abuts against the pad.

[0009] Preferably, the center point of the lower groove is collinear with the center point of the upper groove in the vertical direction, the lower groove overlaps or partially overlaps with the upper groove, and the tool located in the upper groove moves toward the pad located in the lower groove.

[0010] Preferably, the limiting member is provided with a clearance ring groove on the side wall facing the upper groove, the tool is clamped between the upper groove and the clearance ring groove, and the end surface of the tool facing away from the lower mold abuts against the clearance ring groove.

[0011] Preferably, a matching die cavity and a punching module are provided between the upper mold and the lower mold, one of the die cavity and the punching module is arranged in the upper mold, and the other is arranged in the lower mold. The tool and the pad are both annular structures, the tool is arranged around the die cavity, and the pad is arranged around the punching module.

[0012] Preferably, the protruding portion of the tool includes a first cutting edge and a second cutting edge, the first cutting edge and the second cutting edge form an acute-angled tip, and the first cutting edge and the second cutting edge are asymmetrically arranged.

[0013] Preferably, the cushion block is bolted to the lower mold along a vertical direction, and the limiting member is bolted to the upper mold along a vertical direction.

[0014] Preferably, the edge of the upper mold and the edge of the lower mold are provided with a plurality of positioning grooves and positioning blocks that cooperate with each other. When the upper mold and the lower mold are buckled together, the positioning blocks are inserted into the positioning grooves.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) The tool moves with the upper mold toward the lower mold, and cuts while the product is die-cast, achieving efficient cutting operations and reducing the preparation process before cutting, thereby improving production efficiency. At the same time, since the tool is fixed to the upper mold and the pad is fixed to the lower mold, there is no need to perform tedious adjustments and calibrations before each cutting, which saves time and enables the production line to run more smoothly, reducing bottlenecks and delays caused by cutting. During the cutting process, the tool will contact the material at a certain speed and force and complete the cutting. The pad is located on the moving path of the tool, which plays a buffering and isolating role, preventing the tool from directly colliding with the end face of the lower mold, reducing the risk of damage to the lower mold, protecting the integrity and service life of the lower mold, helping to improve production efficiency, reduce downtime and maintenance costs, and the tool automatically cuts with the upper mold, avoiding errors and defective products caused by human operation, thereby improving the product qualification rate and production efficiency.

[0017] (2) The pad provides a stable support surface for the tool during the cutting process, which helps ensure that the tool can move accurately along the preset path during the movement, thereby achieving high-precision cutting. At the same time, the stability of the pad also helps to improve the stability of the entire cutting process and reduce errors caused by vibration or shaking. The tool can perform safe cutting operations under the protection of the pad. This combination not only improves the safety and reliability of the mold, but also ensures the quality and precision of the product.

[0018] (3) The design of the clearance ring groove provides a precise positioning point for the tool, ensuring that the tool can be accurately and stably installed on the upper mold. The tool is effectively fixed on the upper mold through the contact between the end face of the tool and the clearance ring groove, preventing the tool from moving or offsetting during operation, reducing wear and scratches on the upper mold, and significantly improving the durability of the upper mold. The upper mold can maintain high precision and good condition for a longer period of time, reducing the frequency and cost of mold replacement.

[0019] (4) Due to the asymmetric setting of the first and second blade surfaces, the tool can cut into the material more quickly and maintain a stable cutting force during the cutting process. The tool can form a smooth cutting surface during cutting, which helps to reduce burrs and cracks after cutting and improve the smoothness and quality of the cutting surface. At the same time, the asymmetric blade surface design can also reduce the vibration and shaking of the tool during the cutting process, further ensuring the stability of the cutting quality.

[0020] (5) The pads and limiters are fixed by bolting, which provides a stronger connection force and can effectively prevent the mold from loosening or displacement due to vibration or impact during use. It also makes the installation of pads and limiters easier and faster. When the pads or limiters are damaged or worn, they can be quickly disassembled and replaced to restore the normal use of the mold, reducing maintenance costs and improving mold maintenance efficiency. Alternatively, pads and limiters of different specifications and materials can be replaced to adapt to different processing requirements and working environments.

[0021] (6) The coordinated design of the positioning groove and the positioning block can ensure that the upper mold and the lower mold are accurately aligned when they are fastened together, which helps to reduce errors in the stamping process, improve the processing accuracy of the product, and enhance the connection stability between the upper mold and the lower mold. During the stamping process, this stable connection helps to prevent deformation or displacement of the mold and ensure the smooth progress of the stamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a structural schematic diagram of an in-mold cutting structure according to the present invention;

[0024] Figure 2 This is a schematic diagram of the exploded structure of an in-mold cutting structure according to the present invention;

[0025] Figure 3 This is a structural diagram of the upper mold described in the utility model;

[0026] Figure 4 This is a structural diagram of the lower mold described in the utility model;

[0027] Figure 5 This is a schematic cross-sectional view of an in-mold cutting structure according to the present invention;

[0028] Figure 6 This is a partial cross-sectional enlarged structural diagram of an in-mold cutting structure according to the present invention;

[0029] Figure 7 This is a schematic cross-sectional structural diagram of the tool described in the present invention.

[0030] Description of reference numerals:

[0031] 1. Upper mold; 11. Punch die cavity; 12. Upper groove; 13. Upper mounting hole; 14. Positioning groove; 2. Lower mold; 21. Punch module; 22. Lower groove; 23. Lower mounting hole; 24. Positioning block; 3. Tool; 31. Blade; 311. First blade surface; 312. Second blade surface; 32. Blade back; 4. Spacer; 41. Lower threaded hole; 5. Limiting piece; 51. Giving ring groove; 52. Upper threaded hole; 6. Bolt; 100. Product. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] refer to Figure 1 and Figure 2 As shown, an in-mold cutting structure includes an upper mold 1, a lower mold 2, and a mold base. The lower mold 2 is fixed to the mold base. The upper mold 1 is connected to the lower mold 2 by a drive structure, which allows the upper mold 1 to move vertically toward or away from the lower mold 2. Specifically, the lower mold 2 is immersed in a pulp pool or a certain amount of pulp is injected into the lower mold 2. The upper mold 1 and the lower mold 2 are closed together, forming a wet paper blank between the upper mold 1 and the lower mold 2, thereby completing the paper molding. The upper mold 1 and the lower mold 2 include a tool 3 and a spacer 4 that cooperate with each other to cut the formed wet paper blank, reducing the intermediate links in the production process, improving production efficiency, and precisely controlling the shape and size of the product 100 to ensure the good quality of the product 100.

[0036] refer to Figure 3 and Figure 4 As shown, a punching module 21 and a die cavity 11 are included between the upper mold 1 and the lower mold 2. One of the die cavity 11 and the punching module 21 is provided in the upper mold 1, and the other is provided in the lower mold 2. In this embodiment, the die cavity 11 is opened in the upper mold 1, and the punching module 21 is fixed to the lower mold 2. When the upper mold 1 and the lower mold 2 are closed, the punching module 21 is snapped into the die cavity 11. The usage scenario in this state is that the lower mold 2 is immersed in the pulp pool to shape the paper embryo. More specifically, the upper mold 1 is provided with a plurality of through holes, which are connected to the die cavity 11. During the paper molding process, the water in the pulp between the upper mold 1 and the lower mold 2 is discharged outward from the through holes to ensure the quality of the product 100. When the upper mold 1 and the lower mold 2 are demolded, the punching module 21 is away from the die cavity 11 to facilitate the operator to remove the paper embryo. In other embodiments, the die cavity 11 is opened in the lower mold 2, and the punching module 21 is fixed to the upper mold 1. In this state, it is convenient to inject a certain amount of paper pulp into the die cavity 11 for paper molding.

[0037] refer to Figure 4 and Figure 5As shown, specifically, an upper groove 12 is formed on the end surface of the upper mold 1 facing the lower mold 2. The upper groove 12 is an annular groove and is arranged around the outer circumference of the die cavity 11. In this embodiment, the upper groove 12 is a square groove, and the adjacent two sides are rounded to be suitable for the production of square paper-molded products 100. In other embodiments, the upper groove 12 can adopt a circular or polygonal structure to be suitable for different paper-molded products 100. The cutter 3 is an annular blade. Correspondingly, in this embodiment, the cutter 3 has a square structure so that it can be accurately installed in the upper groove 12. In other embodiments, the cutter 3 can adopt a circular or other shape that matches the upper groove 12. Specifically, the cutter 3 is an annular closed structure. The cutter 3 includes a blade portion 31 adjacent to the lower mold 2 and a blade back portion 32 opposite thereto. The blade portion 31 is sharp and is used to cut the product 100. The blade back portion 32 has a certain width to withstand the pressure during cutting. The main body of the tool 3 is placed in the upper groove 12 and partially protrudes out of the upper groove 12 , that is, the back portion 32 of the tool is located in the upper groove 12 and the blade portion 31 protrudes out of the upper groove 12 .

[0038] refer to Figure 6 and Figure 7 As shown, specifically, the blade portion 31 includes a first blade surface 311 and a second blade surface 312. The first blade surface 311 and the second blade surface 312 constitute the tip of the tool 3 for cutting the product 100. The vertical plane where the intersection line of the first blade surface 311 and the second blade surface 312 is located is used as the reference plane. The angle between the first blade surface 311 and the reference plane is smaller than the angle between the second blade surface 312 and the reference plane. The first blade surface 311 is close to the product 100 side, and the second blade surface 312 is close to the cutting waste side. The first blade surface 311 helps to reduce the cutting resistance, making the cutting process smoother. The second blade surface 312 helps to control the removal of chips and ensure that the chips are separated from the product 100.

[0039] A stopper 5 is also provided within the upper groove 12. In this embodiment, the stopper 5 is an annular structure. In other variations, the stopper 5 may be formed of multiple arc-shaped blocks or an elastic material (e.g., a stopper 5 made of a spring or rubber). Specifically, a recessed annular groove 51 is provided on the inner or outer side of the stopper 5. In this embodiment, the recessed annular groove 51 is provided on the inner side of the stopper 5. The recessed annular groove 51 and the sidewall of the upper groove 12 define a space for accommodating the tool 3. The tool 3 is inserted between the recessed annular groove 51 and the upper groove 12. More specifically, the back of the cutter 32 abuts against the end face of the clearance ring groove 51, the inner wall of the cutter 3 abuts against the side wall of the upper groove 12, and the outer wall of the cutter 3 abuts against the side wall of the clearance ring groove 51, thereby preventing the back of the cutter 32 from directly contacting the upper mold 1. The cutter 3 is indirectly connected to the upper mold 1 through the limiter 5. The increased contact area helps to more evenly distribute the pressure generated by the cutter 3 during operation to the upper mold 1, thereby avoiding damage or deformation caused by excessive local stress. It is worth noting that the above-mentioned side walls are structural surfaces along the vertical direction, the inner walls are side walls close to the center of the structure along the vertical direction, the outer walls are side walls away from the center of the structure along the vertical direction, and the end faces are structural surfaces in the horizontal direction.

[0040] refer to Figure 6 As shown, the upper mold 1 is provided with a plurality of upper mounting holes 13 connected to the upper groove 12, and the limiting member 5 is provided with an upper threaded hole 52 that matches the mounting hole. The upper mold 1 is fixedly connected to the limiting member 5 and the upper mold 1 by bolts 6, thereby fixing the tool 3.

[0041] The lower die 2 is provided with a lower groove 22, which is an annular groove. The pad 4 is arranged in the lower groove 22. The center point of the lower groove 22 is collinear with the center point of the upper groove 12 in the vertical direction, and the lower groove 22 overlaps or partially overlaps with the upper groove 12. In order to ensure that the tool 3 can accurately abut against the pad 4, the lower groove 22 partially overlaps with the upper groove 12. Specifically, the radial dimension of the outer peripheral side of the lower groove 22 is between the inner peripheral side dimension of the upper groove 12 and the outer peripheral side dimension of the upper groove 12, and the inner peripheral side dimension of the lower groove 22 is smaller than the inner peripheral side dimension of the upper groove 12. The pad 4 is an annular structure, and the annular tool 3 can completely abut against the pad 4, so that the product 100 is completely separated from the chips.

[0042] refer to Figure 3 and Figure 4 As shown, the lower mold 2 is provided with a plurality of lower mounting holes 23, and the plurality of lower mounting holes 23 are all connected to the lower groove 22. The pad 4 is provided with a lower threaded hole 41 connected to the lower mounting hole 23. The bolt 6 is bolted to the lower threaded hole 41 of the pad 4 through the lower mounting hole 23, and the pad 4 is fixed in the lower groove 22 of the lower mold 2 by the bolt 6.

[0043] Several pairs of cooperating positioning grooves 14 and positioning blocks 24 are provided between the upper mold 1 and the lower mold 2. In this embodiment, the positioning blocks 24 are fixedly connected to the edge of the lower mold 2, while the positioning grooves 14 are provided on the edge of the upper mold 1. In other variations, the positioning grooves 14 are provided in the lower mold 2, and the positioning blocks 24 are fixed to the upper mold 1. Specifically, four sets of positioning grooves 14 and positioning blocks 24 are arranged in four mutually perpendicular directions on a horizontal plane to ensure precise positioning of the upper mold 1 and the lower mold 2.

[0044] The principle of the embodiment: the tool 3 is fixed to the upper mold 1 by the limit member 5, and the upper mold 1 drives the tool 3 to move toward the lower mold 2. The product 100 is squeezed between the upper mold 1 and the lower mold 2, and the tool 3 cuts the product 100 at the same time. Since the tool 3 is a ring-shaped closed structure, the tool 3 can complete the cutting of the product 100 in a single time and remove the burrs on the outer periphery of the product 100.

[0045] Since the back portion 32 of the tool 3 abuts against the limiter 5 and the blade 31 of the tool 3 abuts against the pad 4, the tool 3 is prevented from contacting the upper mold 1 and the lower mold 2, thereby avoiding damage to the upper mold 1 and the lower mold 2.

[0046] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they are not intended to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. An in-mold cutting structure, comprising an upper mold (1) and a lower mold (2), wherein the upper mold (1) and the lower mold (2) are connected in a lifting manner, the upper mold (1) is provided with a punching die cavity (11), and the lower mold (2) is provided with a punching module (21) matched with the punching die cavity (11), characterized in that: include: A tool (3) and a cushion block (4) are provided between the upper mold (1) and the lower mold (2); the tool (3) is fixed to the upper mold (1); the cushion block (4) is fixed to the upper mold (1); and the cushion block (4) is located on the moving path of the tool (3).

2. The in-mold cutting structure according to claim 1, characterized in that: An upper groove (12) is provided on the end surface of the upper mold (1); the tool (3) protrudes relative to the upper mold (1) toward the lower mold (2); a limiting member (5) is built into the upper groove (12); and the tool (3) is partially fixed in the upper groove (12) through the limiting member (5).

3. The in-mold cutting structure according to claim 2, characterized in that: The end surface of the tool (3) facing away from the lower mold (2) abuts against the limiting member (5).

4. The in-mold cutting structure according to claim 2, characterized in that: The lower mold (2) is provided with a lower groove (22), the cushion block (4) is built into the lower groove (22), the end face of the cushion block (4) is flush with the end face of the lower mold (2), and when the upper mold (1) moves toward the lower mold (2), the protruding portion of the tool (3) relative to the upper mold (1) abuts against the cushion block (4).

5. The in-mold cutting structure according to claim 4, characterized in that: The center point of the lower groove (22) and the center point of the upper groove (12) are collinear in the vertical direction, the lower groove (22) overlaps or partially overlaps with the upper groove (12), and the tool (3) located in the upper groove (12) moves toward the pad (4) located in the lower groove (22).

6. The in-mold cutting structure according to claim 3, characterized in that: The limiting member (5) is provided with a clearance ring groove (51) on the side wall facing the upper groove (12); the tool (3) is clamped between the upper groove (12) and the clearance ring groove (51); and the end surface of the tool (3) facing away from the lower mold (2) abuts against the clearance ring groove (51).

7. The in-mold cutting structure according to claim 1, characterized in that: The tool (3) and the cushion block (4) are both annular structures; the tool (3) is arranged around the die cavity (11), and the cushion block (4) is arranged around the die block (21).

8. The in-mold cutting structure according to claim 1, characterized in that: The protruding portion of the tool (3) comprises a first blade surface (311) and a second blade surface (312), wherein the first blade surface (311) and the second blade surface (312) form an acute-angled tip, and the first blade surface (311) and the second blade surface (312) are asymmetrically arranged.

9. The in-mold cutting structure according to claim 2, characterized in that: The cushion block (4) is bolted to the lower mold (2) in a vertical direction, and the limiting member (5) is bolted to the upper mold (1) in a vertical direction.

10. The in-mold cutting structure according to claim 1, characterized in that: The edge of the upper mold (1) and the edge of the lower mold (2) are provided with a plurality of mutually cooperating positioning grooves (14) and positioning blocks (24); when the upper mold (1) and the lower mold (2) are buckled together, the positioning blocks (24) are inserted into the positioning grooves (14).

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