Sheet material forming tableware and its manufacturing method
By designing vertical and inclined blanking surfaces on the blanking die, and combining shearing and punching areas, the problem of burrs on thermoformed tableware is solved, and a forming method that achieves smooth tableware edges and is cost-effective is realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SABERT ZHONGSHAN LTD
- Filing Date
- 2026-01-27
- Publication Date
- 2026-05-26
AI Technical Summary
Existing blister tableware is prone to burrs during the punching and cutting process, which can cause injury to users. At the same time, the production cost is high and the efficiency is low. Furthermore, the existing mold design is difficult to effectively handle thicker tableware.
The die-cutting design features a die-cutting surface that is partially perpendicular to the direction of motion of the moving die and partially inclined to the direction of motion of the moving die. Combined with the shearing and punching areas, this ensures that the edges of the tableware are smooth and that it is formed in one punching operation after molding or vacuum forming.
It achieves smooth edges on tableware, preventing injuries to users, reducing production costs, improving production efficiency, and is suitable for processing tableware of different thicknesses.
Smart Images
Figure CN122074787A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of tableware, specifically to a sheet-processed tableware and its manufacturing method. Background Technology
[0002] Most disposable tableware currently available is made of plastic, such as common knives, spoons, and forks. The most common manufacturing process for disposable tableware is injection molding. Because injection molding involves pouring molten material into a mold, most injection-molded tableware has a raised gate mark at the injection point. This not only affects the tableware's appearance but also its usability, causing discomfort when holding it.
[0003] Therefore, people considered using vacuum forming to produce disposable tableware. Vacuum-formed tableware has no gate marks and has a uniform thickness. However, the vacuum forming process requires first creating a sheet of material, then forming a three-dimensional pattern from the sheet through vacuum extraction, and finally cutting the tableware off the sheet using a punching and shearing method. Currently, most punching and shearing methods use punching and shearing equipment. For example, the three-dimensional sheet of material is placed on a punching and shearing machine equipped with a die, and the movement of the die cuts the three-dimensional tableware off the sheet.
[0004] However, tableware made using the punching and shearing process has rough edges, often resulting in noticeable burrs. Since tableware frequently comes into direct contact with the user's mouth, these burrs can easily injure the mouth. Therefore, tableware made using the vacuum forming method often requires deburring before use. However, deburring often requires specialized equipment, increasing production costs. Furthermore, the additional deburring process after punching and shearing adds to production time, leading to low production efficiency. Consequently, existing vacuum-formed tableware suffers from high production costs and low processing efficiency.
[0005] To improve the edge smoothness of thermoformed products, some existing thermoforming punching and shearing equipment uses molds with inclined surfaces. That is, the surface of the punching and shearing mold is inclined to the direction of movement of the punching and shearing mold. In this way, a shearing effect is formed during punching and shearing. Since the edges of the cut products are smoother, the burrs on the product edges can be effectively reduced.
[0006] See Figure 1 and Figure 2When punching and shearing thermoformed products, relative movement occurs between the upper mold 81 and the lower mold 82. For example, the upper mold 81 moves downward and extends into the lower mold 82. To prevent the outer surface 83 of the upper mold 81 from contacting the inner surface 84 of the lower mold 82 and causing damage to either mold, the outer diameter of the opening of the lower mold 82 is usually made slightly larger than the outer diameter of the upper mold 81. Figure 2 As shown, there is a certain gap between the outer side 83 of the upper mold 81 and the inner side 84 of the lower mold 82. Typically, the size D1 of this gap is between 0.01±0.005mm. If the gap is too large, too much waste will remain on the edge of the product after punching and shearing, and it may even be impossible to punch or shear the product, thus making it impossible to separate the product from the sheet metal.
[0007] Because the gap between the outer side 83 of the upper mold 81 and the inner side 84 of the lower mold 82 is very small, the stroke of the upper mold 81 needs to be controlled within a certain range, such as within 5mm. If the stroke is too large, the outer side 83 of the upper mold 81 may easily touch the inner side 84 of the lower mold 82 due to vibration or other reasons during the downward movement of the upper mold 81, which may lead to damage to the upper mold 81 or the lower mold 84.
[0008] Because the stroke of the upper mold 81 is very small, existing punching and shearing processes can only be used for products with very small thicknesses, meaning that most existing blister tableware is flat. If the tableware is thicker, some existing punching and shearing dies design the lower surface of the upper mold into a multi-segmented bent shape, including upward and downward inclined bent segments, in order to reduce the stroke of the upper mold. However, since this type of upper mold's lower surface does not have a horizontal segment perpendicular to the direction of movement, the angle between the upward and downward inclined bent segments is very sharp. This results in spikes forming on the punched product at the position between the upward and downward inclined bent segments on the lower surface of the mold, affecting the smoothness of the tableware's edges. Summary of the Invention
[0009] The first objective of this invention is to provide a sheet-processed tableware that can prevent burrs from injuring users while ensuring the strength of the tableware.
[0010] A second objective of this invention is to provide a method for manufacturing the above-mentioned sheet-based tableware.
[0011] To achieve the first objective of this invention, the sheet-processed tableware provided by this invention includes a main body and a handle. The main body is located at one end of the handle, and the main body and the handle are formed by molding or vacuum forming from a single sheet of material. The tableware is formed by punching with a die in one step. Along the length of the tableware, one part of the tableware is a punching area, and the other part of the tableware is a shearing area. Furthermore, the punching die has a movable die and a punching block that can move relative to each other. The punching block has a punching surface for punching the tableware. The punching surface corresponding to the punching area of the tableware is perpendicular to the movement direction of the movable die, and the punching surface corresponding to the shearing area of the tableware is inclined to the movement direction of the movable die.
[0012] As can be seen from the above scheme, the tableware of the present invention is formed by molding or vacuum forming a sheet of material and then punching it. In the punching mold, part of the punching surface of the punching block is perpendicular to the movement direction of the moving mold, and the other part is inclined to the movement direction of the moving mold. In this way, the part of the punching surface perpendicular to the movement direction of the moving mold corresponds to the punching area of the tableware, while the part inclined to the movement direction of the moving mold corresponds to the shearing area of the tableware. The edge of the shearing area of the tableware is relatively smooth with fewer burrs, which can avoid the user's mouth or hands being injured by too many or too large burrs on the edge of the tableware. On the other hand, since the tableware also has a punching area, the punching surface corresponding to the punching area of the tableware is perpendicular to the movement direction of the moving mold. Therefore, the punching surface includes a part perpendicular to the movement direction of the moving mold. Thus, the punching surface does not have a sharp turning angle, which can effectively avoid the formation of thorns at the edge of the tableware and ensure the smoothness of the tableware edge.
[0013] A preferred embodiment is that there is more than one shearing region, wherein the first shearing region is located at the end of the main body away from the handle.
[0014] Since the part of the main body furthest from the handle is often in direct contact with the user's mouth, setting the end of the main body furthest from the handle as a shearing zone ensures that the edge of the main body furthest from the handle has a high degree of smoothness, thus avoiding injury to the user's mouth.
[0015] A further option is to have two or more cutting areas, with the second cutting area located in the connection area between the main body and the handle.
[0016] Since the connection area between the handle and the main body is the area that is easily touched when distributing tableware, the connection area between the handle and the main body is designed as a shear area, so that the edge of this part has a high degree of smoothness, avoiding injury to the user's hand when distributing or picking up tableware.
[0017] A further solution is to locate the third shearing zone at the end of the handle furthest from the main body. Since the end of the handle furthest from the main body is often where the user grips the handle, designating this area as the shearing zone can prevent the user from being injured by burrs during use.
[0018] To achieve the second objective mentioned above, the method for manufacturing sheet-formed tableware provided by the present invention includes: preparing a blank of sheet material; molding or vacuum forming a three-dimensional shape by pressing or vacuum forming a softened sheet material, or hot molding an unsoftened sheet material to form a three-dimensional shape; placing the sheet material with the three-dimensional shape in a die-cutting mold, the die-cutting mold having a movable die and a die-cutting block that can move relative to each other, the sheet material with the three-dimensional shape being placed between the movable die and the die-cutting block; the die-cutting block having a die-cutting surface for die-cutting tableware, and a portion of the die-cutting surface being perpendicular to the movement direction of the movable die, and another portion of the die-cutting surface being inclined to the movement direction of the movable die; moving the movable die closer to the die-cutting block, so that a portion of the sheet material with the three-dimensional shape is die-cut and another portion is sheared, and tableware is obtained after one die-cutting.
[0019] As can be seen from the above scheme, when making tableware, firstly, a sheet of material with a three-dimensional shape is molded or vacuum-formed into the three-dimensional shape of the tableware. Then, a die-cutting mold is used for cutting. Since part of the cutting surface of the die-cutting block is perpendicular to the movement direction of the moving mold, and the other part is inclined to the movement direction of the moving mold, the part perpendicular to the movement direction of the moving mold is equivalent to shearing the edge of the tableware, while the part inclined to the movement direction of the moving mold corresponds to cutting the edge of the tableware. In this way, the cut product has a smoother edge at the sheared area, which can prevent the user from being injured. In addition, the cut tableware also has a sheared area, which can prevent the cutting surface of the moving mold from forming a sharp turning angle, effectively preventing the formation of thorns at the edge of the tableware and ensuring the smoothness of the tableware edge.
[0020] A further option is that the cutlery includes a body and a handle; a portion of the area of the sheet material with the three-dimensional shape that is punched is located at the end of the body of the cutlery away from the handle.
[0021] A further proposed solution is to have another portion of the area where the sheet material with a three-dimensional shape is punched and sheared is located at the connection between the body of the tableware and the handle.
[0022] A further embodiment is that the moving die includes a lower die and an upper die, with a sheet material of a three-dimensional shape being clamped between the upper die and the lower die; a blanking block is located between the upper die and the lower die, and a through hole is provided in the middle of the blanking block, into which the upper die and the lower die can extend.
[0023] As can be seen, the upper and lower dies clamp the part that forms a three-dimensional shape. When the moving die moves relative to the blanking block, a large force is generated between the edge of the tableware and the sheet material, causing the tableware to detach from the sheet material. Since there is a through hole in the middle of the blanking block, both the upper and lower dies can extend into the through hole, providing movement space for the blanking die to perform the blanking.
[0024] A further proposed solution is to have mounting holes on the upper end face of the upper mold, with elastic elements installed inside the mounting holes to apply elastic force to the upper mold.
[0025] As can be seen, when the lower die moves upward, the punching block is fixed, while the upper die moves upward a small distance under the action of the elastic element, thereby causing relative displacement between the upper die and the punching block, and punching the tableware off the sheet material.
[0026] A further improvement is that both the upper and lower molds are equipped with guide holes, through which the guide rods can pass respectively.
[0027] It can be seen that by guiding the upper and lower dies through the guide rod, the upper die, lower die and the blanking block always maintain relative linear motion during the blanking process, thereby ensuring that the tableware will not deviate during the blanking process, ensuring blanking quality and improving the yield of tableware. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the upper and lower dies of an existing punching and shearing die.
[0029] Figure 2 yes Figure 1 A magnified view of a portion of the image.
[0030] Figure 3 This is a structural diagram from a first perspective of an embodiment of the sheet-processed tableware of the present invention.
[0031] Figure 4 This is a structural diagram from a second perspective of an embodiment of the sheet-processed tableware of the present invention.
[0032] Figure 5 This is a first-view structural diagram of the die used in the method for manufacturing tableware by sheet processing of the present invention.
[0033] Figure 6 This is a structural diagram of the punching die used in the method for manufacturing tableware by sheet processing according to the present invention, from a second perspective.
[0034] Figure 7 This is a first-view exploded view of the die used in the method for manufacturing tableware by sheet processing of the present invention.
[0035] Figure 8 This is an exploded view of the die used in the method for manufacturing tableware by sheet processing according to the present invention.
[0036] Figure 9 This is a structural diagram of the lower die of the punching die used in the method for manufacturing tableware by sheet processing of the present invention.
[0037] Figure 10 This is a structural diagram of the upper die of the punching die used in the method for manufacturing tableware by sheet processing of the present invention, from a first-view perspective.
[0038] Figure 11 This is a structural diagram of the upper die of the punching die used in the method for manufacturing tableware by sheet processing of the present invention, from a second perspective.
[0039] Figure 12 This is a structural diagram of the upper and lower die of the punching die used in the method for manufacturing tableware by sheet processing of the present invention.
[0040] Figure 13 This is a first-view structural diagram of the punching block of the punching die used in the method for manufacturing tableware by sheet processing of the present invention.
[0041] Figure 14 This is a structural diagram from a second perspective of the punching block of the punching die used in the method for manufacturing tableware by sheet processing of the present invention.
[0042] Figure 15 This is a third-view structural diagram of the blanking block of the blanking die used in the method for manufacturing tableware by sheet processing of the present invention.
[0043] Figure 16 This is a third-view structural diagram of the punching die used in the method for manufacturing tableware by sheet processing of the present invention.
[0044] Figure 17 This is a third-view exploded view of the die used in the method for manufacturing tableware by sheet processing of the present invention.
[0045] Figure 18 It is a cross-sectional view of the edge of the punched and sheared area of the tableware.
[0046] Figure 19 It is a cross-sectional view of the edge of the cut area of the tableware.
[0047] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation
[0048] The sheet-formed tableware of this invention is made from sheet material through molding or vacuum forming, followed by die-cutting. See also... Figure 3In this embodiment, the cutlery is a fork 10, which has a handle 11 and a main body 12. The handle 11 is elongated, and the main body 12 is located at one end of the handle 11. The main body 12 is provided with a plurality of fork tines 13. Furthermore, the cutlery of this invention has a certain thickness; for example, the thickness of the fork 10 is between 15mm and 20mm. It should be noted that the thickness of the fork 10 is not the thickness of a sheet material, but rather the distance between the highest point on the front and the lowest point on the back of the fork 10.
[0049] The fork 10 in this embodiment is made of plastic and manufactured using a vacuum forming process. Specifically, a sheet of material 18, such as a plastic sheet, is pre-processed. Typically, the thickness of the sheet material is between 1 mm and 2 mm. The sheet material 18 is then placed into a vacuum forming machine for vacuum forming, forming the three-dimensional shape of the fork 10 on the sheet material 18. The sheet material 18 with the three-dimensional shape of the fork 10 is then placed into a die-cutting machine for die-cutting, causing the fork 10 to detach from the sheet material 18, thus obtaining the finished fork 10.
[0050] Of course, in other embodiments, the fork 10 can also be molded, for example, by using environmentally friendly materials such as pulp to make a sheet-like wet blank. The wet blank is also a sheet material. The wet blank is placed into a mold and molded to form the three-dimensional shape of the fork. Then, the wet blank with the three-dimensional shape of the fork is placed into a punching device for punching processing, so that the fork is separated from the sheet material to obtain the finished fork.
[0051] In this embodiment, when punching the fork 10, the characteristics of punching and shearing processes are combined, and the fork 10 is separated from the sheet material in a single punching operation. Therefore, a portion of the fork 10 is the punching / shearing area, and another portion is the shearing area. See [link to documentation]. Figure 4 Along the length of the fork 10, from the end of the fork tooth 13 of the main body 12 to the end of the handle 11, the fork 10 sequentially forms multiple punching and shearing areas and multiple shearing areas, specifically including a first shearing area 21, a first punching and shearing area 22, a second shearing area 23, a second punching and shearing area 24, a third shearing area 25, a third punching and shearing area 26, a fourth shearing area 27, and a fourth punching and shearing area 28.
[0052] The first shearing area 21 is located at the end of the main body 12 furthest from the handle 11, which is the area where the end of the fork tooth 13 is located. The second shearing area 23 is located in the connection area between the main body 12 and the handle 11. The third shearing area 25 and the fourth shearing area 27 are both located at the handle 11, and are located relatively far from the main body 12. The third shearing area 25 and the fourth shearing area 27 are the areas that the user is accustomed to holding.
[0053] To better punch the fork 10, this embodiment uses a special punching die, see [link to example]. Figures 5 to 8 In this embodiment, the blanking die includes a movable die and a blanking block 50. The movable die includes an upper die 30 and a lower die 40, and the blanking block 50 is fixed to the blanking equipment. Therefore, the blanking block 50 cannot move relative to the blanking equipment. The lower die 40 can be driven up and down by the blanking equipment, and therefore, the lower die 40 can move up and down relative to the blanking block 50. In addition, the upper die 30 is located above the lower die 40, and the upper die 30 can be pushed upward a certain distance by the lower die 40. Therefore, the upper die 30 can also move up and down relative to the blanking block 50.
[0054] See Figure 9 The lower die 40 has a base 41 and a protrusion 42. The outer end face of the protrusion 42 forms the shape of a fork 10, and the outer end face of the protrusion 40 forms a concave shape. Therefore, the lower die 40 is a concave die. In addition, a guide hole 43 is provided at both ends of the base 41 along its length. The guide rod of the punching equipment can pass through the guide hole 43 to limit the trajectory of the lower die 40's up and down movement, thus preventing the lower die 40 from deviating during its movement.
[0055] See Figure 10 and Figure 11 The upper mold 30 has a base 31 and a protrusion 32. The outer end face of the protrusion 32 forms the shape of a fork 10, and the outer end face of the protrusion 32 forms an outward convex shape. Therefore, the upper mold 30 is a punch. In addition, guide holes 33 are provided at the four apex corners of the base 31. Guide rods can pass through the guide holes 33, thereby limiting the movement trajectory of the upper mold 33 in the vertical direction and preventing the upper mold 30 from deviating during movement.
[0056] In addition, the upper end face 35 of the upper mold 30 is provided with three mounting holes 34. Each mounting hole 34 is a circular blind hole, and elastic elements 38 such as springs can be installed in the mounting holes 34. The elastic elements 38 can apply elastic force to the upper mold 30. See also Figure 12 During blanking, the protrusion 32 of the upper die 30 can abut against the protrusion 42 of the lower die 40. When the lower die 40 moves upward, it can push the upper die 30 upward. Since multiple springs are installed above the upper die 30, when the upper die 30 is subjected to the upward force of the lower die 40, the upper die 30 moves upward, causing the springs to be compressed. When the springs are compressed to their limit, the upper die 30 can no longer move upward. When the lower die 40 moves downward, the upper die 30 is pushed and moves downward under the elastic restoring force of the springs. It can be seen that when the lower die 40 moves upward, the upper die 30 is not stationary, but moves upward a small distance within a certain range.
[0057] See Figures 13 to 15 The blanking block 50 has a through hole 51 in its middle. The outer contour of the through hole 51 is the same as the outer contour of the fork 10, that is, the same as the outer contour of the protrusion 32 of the upper die 30 and the outer contour of the protrusion 42 of the lower die 40. Therefore, the protrusion 32 of the upper die 30 and the protrusion 42 of the lower die 40 can both extend into the through hole 51. In addition, the blanking block 50 is also provided with multiple positioning holes 52, from Figure 13 As can be seen, multiple positioning holes 52 are provided on the outside of the through hole 51. The positioning pins on the punching equipment can pass through the positioning holes 52, thereby realizing the positioning of the punching block 50 on the punching equipment, thus ensuring the vertical positional consistency of the upper die 30, the lower die 40 and the punching block 50.
[0058] The end face of the blanking block 50 near the lower die 40 is the blanking surface 60. The blanking surface 60 includes multiple segments. Specifically, along the length of the blanking block 50, from the fork teeth to the end of the handle, there are sequentially arranged a first shearing segment 61, a first punching segment 62, a second shearing segment 63, a second punching segment 64, a third shearing segment 65, a third punching segment 66, a fourth shearing segment 67, and a fourth punching segment 68. Figure 15 , Figure 16 and Figure 17 It can be seen that the first shearing segment 61, the second shearing segment 63, the third shearing segment 65, and the fourth shearing segment 67 are all inclined to the lower surface of the base 41 of the lower mold 40, while the movement direction of the lower mold 40 is perpendicular to the lower surface of the base 41 of the lower mold 40. The movement direction of the lower mold 40 is as follows: Figure 16 As indicated by the arrows, the first shearing segment 61, the second shearing segment 63, the third shearing segment 65, and the fourth shearing segment 67 are all inclined to the direction of movement of the lower die 40. Thus, when punching sheet material, a shearing effect will be achieved at the first shearing segment 61, the second shearing segment 63, the third shearing segment 65, and the fourth shearing segment 67. Meanwhile, the first punching segment 62, the second punching segment 64, the third punching segment 66, and the fourth punching segment 68 are all parallel to the lower surface of the base 41 of the lower die 40. Therefore, the first punching segment 62, the second punching segment 64, the third punching segment 66, and the fourth punching segment 68 are all perpendicular to the direction of movement of the lower die 40. Thus, a punching and shearing effect will be achieved at the first punching segment 62, the second punching segment 64, the third punching segment 66, and the fourth punching segment 68.
[0059] When making a fork, the first step is to create a blank of sheet material, such as a wet blank made from paper pulp or a sheet of plastic. Then, a three-dimensional fork shape is formed on the sheet material using molding or vacuum forming processes. Next, the sheet material is punched. When punching the sheet material 18 with the three-dimensional fork shape, firstly, the lower die 40 moves downwards, creating a gap between the lower die 40 and the upper die 30. Since the punching block 50 is fixed to the punching equipment, it does not move downwards. Next, the sheet material 18 with the three-dimensional fork shape is placed on the punching equipment, specifically between the protrusion 32 of the upper die 30 and the protrusion 42 of the lower die 40, with the sheet material 18 positioned below the punching block 50. Furthermore, the three-dimensional shape of the fork needs to be aligned with the protrusion 32 of the upper mold 30. Since the protrusion 32 of the upper mold 30 and the protrusion 42 of the lower mold 40 are both contour molds, the shape of the fork is completely consistent with the surface of the protrusions 32 and 42. After aligning the three-dimensional shape of the fork with the protrusions 32 and 42, the edge of the fork 10 matches the edge of the protrusions 32 and 42.
[0060] Then, the punching equipment drives the lower die 40 to move upward. When the lower die 40 moves upward, it punches the sheet material 18. Since the sheet material 18 is located below the punching block 50, when the protrusion 42 of the lower die 40 moves upward and inserts into the through hole 51 of the punching block 50, the sheet material 18 is punched. Specifically, the first shearing section 61, the second shearing section 63, the third shearing section 65, and the fourth shearing section 67 shear the sheet material 18 by shearing, while the first punching section 62, the second punching section 64, the third punching section 66, and the fourth punching section 68 punch the sheet material 18. Therefore, the punching equipment can achieve both shearing and punching of the sheet material 18 in one operation.
[0061] As the lower die 40 moves upward, the upper die 30 is pushed upward. Because a spring is located above the upper die 30, it pushes the spring and moves upward a certain distance. At this time, the upper die 30 also moves relative to the punching block 50. Since the fork 10 is pressed between the upper die 30 and the lower die 40, it moves upward along with the upper die 30 and the lower die 40. Other parts of the sheet material 18 are limited by the punching block 50 and cannot move upward. Therefore, the fork 10 separates from the sheet material 18. After punching, the fork 10 separates from the sheet material 18 and remains on the lower die 40. After the lower die 40 moves downward, the fork 10 can be removed from the lower die 40.
[0062] Thus, a portion of the fork 10 is cut using a shearing method, while another portion is cut using a punching-shear method. Because the shearing process results in smoother edges and fewer burrs, using shearing at the ends of the fork tines 13, the connection area between the handle 11 and the main body 12, and certain areas of the handle 11 ensures smoother edges in these areas, preventing burrs from causing injury to the user, such as puncturing the user's mouth or hand. See also Figure 18 and Figure 19 In the punching and shearing area, the upper surface 16 and the lower surface 17 of the fork 10 are parallel to each other, and the edge forms a transition area 85 that is close to a right angle. In the shearing area, the transition area 86 at the edge of the fork 10 is relatively gentle. Therefore, the edge of the shearing area is smoother.
[0063] Furthermore, the punching surface 60 of the present invention includes multiple shearing segments and punching segments, so multiple shearing areas of the tableware can be sheared by multiple shearing segments, and the stroke of the lower die 40 is relatively short, enabling punching of products with a certain thickness. Figure 15 As can be seen, the angle between adjacent shearing segments and punching segments on the punching surface 60 is a large obtuse angle, so the angle is not sharp. For example, the first shearing segment 61 and the first punching segment 62 form an obtuse angle of about 160°. In this way, it is possible to avoid the formation of spikes on the edge of the tableware and improve the smoothness of the tableware edge.
[0064] It should be noted that the tableware of the present invention is not limited to forks, but can also be other forms of tableware such as knives, spoons, or forks and spoons.
[0065] Finally, it should be emphasized that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A type of sheet-formed tableware, comprising: The main body and the handle are provided, wherein the main body is located at one end of the handle, and the main body and the handle are formed by molding or vacuum forming from a single sheet of material; Its features are: The tableware is punched out in one step by a punching die. Along the length of the tableware, one part of the tableware is the punching and shearing area, and the other part of the tableware is the shearing area. The blanking die has a movable die and a blanking block that can move relative to each other. The blanking block has a blanking surface for blanking the tableware. The blanking surface corresponding to the blanking area of the tableware is perpendicular to the movement direction of the movable die, and the blanking surface corresponding to the shearing area of the tableware is inclined to the movement direction of the movable die.
2. The sheet-processed tableware according to claim 1, characterized in that: The number of shearing regions is one or more, wherein the first shearing region is located at the end of the main body away from the handle.
3. The sheet-processed tableware according to claim 2, characterized in that: There are two or more cutting regions, with the second cutting region located in the connection area between the main body and the handle.
4. The sheet-processed tableware according to claim 2, characterized in that: The third shearing region is located at the end of the handle away from the main body.
5. Methods for manufacturing tableware by processing sheet materials, including: The blank of sheet material is made by molding or vacuum forming the softened sheet material into a three-dimensional shape, or by hot molding the unsoftened sheet material into a three-dimensional shape. Its features are: The sheet material with a three-dimensional shape is placed in a blanking die, the blanking die having a movable die and a blanking block that can move relative to each other, and the sheet material with a three-dimensional shape is placed between the movable die and the blanking block; The punching block has a punching surface for punching the tableware, and a portion of the punching surface is perpendicular to the direction of movement of the moving die, while another portion of the punching surface is inclined to the direction of movement of the moving die. The moving die is moved closer to the punching block, so that a portion of the sheet material with a three-dimensional shape is punched and another portion is cut, and the tableware is obtained after one punching.
6. The method for manufacturing tableware by sheet processing according to claim 5, characterized in that: The tableware includes a main body and a handle; A portion of the sheared area of the sheet material with a three-dimensional shape is located at the end of the body of the cutlery away from the handle.
7. The method for manufacturing tableware by sheet processing according to claim 6, characterized in that: Another portion of the area where the sheet material with a three-dimensional shape is punched is located at the connection between the body of the cutlery and the handle.
8. The method for manufacturing tableware by sheet processing according to any one of claims 5 to 7, characterized in that: The moving mold includes a lower mold and an upper mold, and the sheet material with a three-dimensional shape is clamped between the upper mold and the lower mold; The blanking block is located between the upper die and the lower die, and a through hole is provided in the middle of the blanking block, into which the upper die and the lower die can extend.
9. The method for manufacturing tableware by sheet processing according to claim 8, characterized in that: The upper end face of the upper mold is provided with a mounting hole, and the elastic element is installed in the mounting hole to apply an elastic force to the upper mold.
10. The method for manufacturing tableware by sheet processing according to claim 8, characterized in that: Both the upper mold and the lower mold are provided with guide holes.