Paper pulp molded fork spoon and mold thereof

Abstract

The utility model discloses a paper pulp molding fork and spoon and a mold thereof. The fork and spoon comprises a grab handle, a spoon part and a fork part which are integrally formed. Wherein an S-shaped transition structure formed by a first connecting radian and a second connecting radian is formed at the joint of the spoon part and the grab handle, and the fork part converges towards the extension line of the central shaft through a preset gradient and is provided with a fork column with a tip end. The edge of the grab handle is provided with a first arc edge bent towards the back side and a first folded edge bent towards the front side. The edge of the spoon part is provided with a second arc edge with a bent back side and a second folded edge with a bent front side; and the edge of the fork column is provided with a third arc edge with a bent back side and a third folding edge with a bent front side. Through the combined design of multiple sections of arc edges and folded edges, a continuous reinforced edge supporting system is formed, the overall anti-bending performance is improved on the basis of maintaining a thin-wall structure, meanwhile, stress distribution is optimized through an S-shaped transition and gradient convergence structure, the technical effect that the structural strength of the fork spoon can be enhanced without thickening is achieved, and the service life of the fork spoon is prolonged. And the environmental protection property and the use comfort are both considered.

Description

TECHNICAL FIELD

[0001] The utility model relates to paper pulp moulding technical field, concretely relates to a kind of paper pulp moulding fork and its mould. BACKGROUND

[0002] Disposable tableware is one of indispensable tableware in modern life, which includes disposable knife fork spoon and the like. The current catering, take-out industry consumes a large amount of disposable fork, and common disposable plastic fork is widely used because of mature production process, sufficient raw material source and low price. However, these plastic forks are difficult to recycle and cannot be naturally degraded, which poses a challenge to the environment. Paper pulp molded fork is made of plant fibers such as sugarcane pulp and bamboo pulp as raw material, supplemented by functional additives (waterproof agent, oil-proof agent, wet strength agent) to form pulp with certain concentration, and then formed into wet blank by required mold forming machine. After demolding, dehydration and drying, the environmental protection tableware product with certain buffering performance is formed through shaping, edge cutting and sterilization processes.

[0003] Although the paper pulp molded fork meets the use requirements to some extent, the existing disposable paper pulp molded fork generally has the problem of low strength. During use, a certain pressure needs to be applied to the fork to pick up food, so deformation is more likely to occur. In the prior art, the strength of the fork is increased by thickening, which increases the inconvenience of use, affects the comfort of use, and also makes the production cost high. SUMMARY

[0004] In view of the above problems, the utility model provides a paper pulp molded fork and its mold, which solves the problems of inconvenience, poor comfort and high cost caused by thickening and strengthening of the existing products.

[0005] To achieve the above-mentioned purpose, the present application provides a paper pulp molded fork, which comprises a handle, a spoon part and a fork part which are integrally formed and connected in sequence. In the projection direction of the fork from front to back, the connection between the spoon part and the handle has a first connection curvature, and the edge of the spoon part also has a second connection curvature, which forms an S shape in connection with the first connection curvature. The connection between the fork part and the spoon part gradually approaches the extension line of the central axis of the fork with a preset gradient. The fork part has a plurality of spaced-apart fork columns, and the end of the fork column is a sharp end. The edge of the handle has a first arc edge and a first folded edge in sequence from inside to outside, the first arc edge bends towards the back side of the fork, and the first folded edge bends towards the front side of the fork. The edge of the spoon part has a second arc edge and a second folded edge in sequence from inside to outside, the second arc edge bends towards the back side of the fork, and the second folded edge bends towards the front side of the fork. The edge of each fork column has a third arc edge and a third folded edge in sequence from inside to outside, the third arc edge bends towards the back side of the fork, and the third folded edge bends towards the front side of the fork.

[0006] In some embodiments, the pulp molded fork and spoon further comprises a first connecting rib group, a second connecting rib group and a third connecting rib group, the first connecting rib group is distributed in a first preset manner along the back side of the handle; the second connecting rib group is distributed in a second preset manner along the back side of the spoon; and the third connecting rib group is distributed in a third preset manner along the back side of the fork column.

[0007] In some embodiments, the first preset manner, the second preset manner and the third preset manner are configured to be distributed in a grid-like manner; or, the first preset manner, the second preset manner and the third preset manner are configured to be distributed in parallel array along the central axis extension direction of the fork and spoon; or, the first preset manner, the second preset manner and the third preset manner are configured to be distributed in vertical array along the central axis extension direction of the fork and spoon.

[0008] In some embodiments, the number of the first connecting rib group is multiple, and the multiple first connecting rib groups are distributed in axial interval on the back side of the handle; the number of the second connecting rib group is multiple, and the multiple second connecting rib groups are distributed in axial interval on the back side of the spoon; and the number of the third connecting rib group is multiple, and the multiple third connecting rib groups are distributed in axial interval on the back side of the fork column.

[0009] In some embodiments, each first connecting rib group comprises two oppositely arranged first connecting ribs, each first connecting rib being used for connecting the first arc edge and the first folding edge; each second connecting rib group comprises two oppositely arranged second connecting ribs, each second connecting rib being used for connecting the second arc edge and the second folding edge; and each third connecting rib group comprises two oppositely arranged third connecting ribs, each third connecting rib being used for connecting the third arc edge and the third folding edge.

[0010] In some embodiments, each first connecting rib group comprises a first reinforcing rib, the first reinforcing rib being arranged perpendicularly to the central axis extension direction of the fork and spoon on the back side of the handle; each second connecting rib group comprises a second reinforcing rib, the second reinforcing rib being arranged perpendicularly to the central axis extension direction of the fork and spoon on the back side of the spoon; and each third connecting rib group comprises a third reinforcing rib, the third reinforcing rib being arranged perpendicularly to the central axis extension direction of the fork and spoon on the back side of the fork column.

[0011] In some embodiments, the inner side of the handle is further provided with a first groove; the inner side of the spoon is further provided with a second groove, and the first groove and the second groove are in communication.

[0012] In some embodiments, the distance between the first groove and the edge of the handle is a constant value; and the distance between the second groove and the edge of the spoon is a constant value.

[0013] In some embodiments, the inner side of each fork column is further provided with a third groove, and the multiple third grooves are in communication with the second groove.

[0014] In some embodiments, the end of the fork column is provided with a plurality of fork pins arranged in parallel, with a gap between two adjacent fork pins; each fork pin has a fourth arc edge and a fourth folded edge arranged sequentially from the inside to the outside, the fourth arc edge bends toward the back side of the fork spoon, and the fourth folded edge bends toward the front side of the fork spoon.

[0015] Secondly, this application provides a mold for producing pulp molded forks and spoons, which is compatible with any of the aforementioned pulp molded forks and spoons.

[0016] Unlike existing technologies, the above technical solution provides a pulp-molded fork and spoon, characterized by comprising an integrally molded handle, spoon portion, and fork portion. The connection between the spoon portion and the handle forms an S-shaped transition structure composed of a first connecting arc and a second connecting arc. The fork portion converges towards the central axis via a preset gradient and features a fork post with a pointed tip. The handle edge has a first arc edge bending towards the back and a first folded edge bending towards the front; the spoon edge has a second arc edge bending towards the back and a second folded edge bending towards the front; the fork post edge has a third arc edge bending towards the back and a third folded edge bending towards the front. This structure, through the combination of multiple arc edges and folded edges, forms a continuously reinforced edge support system, improving overall bending resistance while maintaining a thin-walled structure. Simultaneously, the S-shaped transition and gradient convergence structure optimize stress distribution, achieving the technical effect of enhancing the structural strength of the fork and spoon without thickening, thus balancing environmental friendliness and user comfort.

[0017] The above description of the utility model is merely an overview of the technical solution of this utility model. In order to enable those skilled in the art to better understand the technical solution of this utility model and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this utility model easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this utility model. Attached Figure Description

[0018] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of the present invention and other related contents, and should not be considered as limitations on the present invention.

[0019] In the accompanying drawings of the instruction manual:

[0020] Figure 1 This is a schematic diagram of the front structure of the pulp molded fork and spoon described in a specific embodiment;

[0021] Figure 2 This is a schematic diagram of the back structure of the pulp molded fork and spoon described in a specific embodiment;

[0022] Figure 3 This is a schematic diagram of the first structure of the pulp molding fork and spoon described in a specific embodiment;

[0023] Figure 4 A cross-sectional schematic diagram of the handle as described in the specific embodiment;

[0024] Figure 5 This is a schematic diagram of the second structure of the pulp molding fork and spoon described in a specific embodiment;

[0025] Figure 6 This is a schematic diagram of the third structure of the pulp-molded fork and spoon described in a specific embodiment.

[0026] The reference numerals used in the above figures are explained as follows:

[0027] 1. Handle;

[0028] 11. First arc edge;

[0029] 12. First fold;

[0030] 13. First groove;

[0031] 2. Spoon part;

[0032] 21. Second groove;

[0033] 3. Fork section;

[0034] 31. Forked post;

[0035] 32. Fork needle;

[0036] 4. First connecting rib plate assembly. Detailed Implementation

[0037] To illustrate in detail the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this utility model, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this utility model and are therefore intended to limit the scope of protection of this utility model.

[0038] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0039] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0040] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0041] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0042] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0043] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0044] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0045] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0046] Please see Figures 1 to 6 This embodiment provides a pulp molded fork and spoon, including an integrally formed handle 1, a spoon portion 2, and a fork portion 3 connected in sequence; along the fork and spoon from front to back (this application will refer to...) Figure 1 The direction shown is defined as "forward". Figure 2 The direction shown is defined as the projection direction of "back". The connection between the spoon part 2 and the handle 1 has a first connecting arc. The edge of the spoon part 2 also has a second connecting arc. The second connecting arc and the first connecting arc are connected to form an S-shape. The connection between the fork part 3 and the spoon 2 gradually approaches the extension line of the central axis of the fork and spoon with a preset gradient. The fork part 3 has multiple spaced fork posts 31. The ends of the fork posts 31 are pointed. The edge of the handle 1 is provided with a first arc edge 11 and a first folded edge 12 from the inside to the outside. The first arc edge 11 bends toward the back side of the fork and spoon, and the first folded edge 12 bends toward the front side of the fork and spoon. The edge of the spoon part 2 is provided with a second arc edge and a second folded edge from the inside to the outside. The second arc edge bends toward the back side of the fork and spoon, and the second folded edge bends toward the front side of the fork and spoon. The edge of each fork post 31 is provided with a third arc edge and a third folded edge from the inside to the outside. The third arc edge bends toward the back side of the fork and spoon, and the third folded edge bends toward the front side of the fork and spoon.

[0047] In this embodiment, the pulp molded fork and spoon adopts an integral molding structure, with the handle 1, spoon 2, and fork 3 forming a continuous transition, avoiding stress concentration and reducing material redundancy. The connection between the spoon 2 and the handle 1 is formed by an S-shaped connection of the first and second connecting arcs, creating a transition area with bidirectional curvature. This S-shaped curve extends along the projection direction of the fork and spoon from front to back, utilizing the geometric characteristics of the hyperboloid to disperse the force at the joint point between the spoon 2 and the handle 1, reducing the risk of breakage due to local bending during the application of force.

[0048] The connection between the fork 3 and the spoon 2 converges towards the central axis with a preset gradient. This means the width of the fork 3 gradually narrows from the end of the spoon 2, resulting in a linear arrangement of the fork posts 31 along the central axis. This maintains the structural continuity of the joint surface between the fork 3 and the spoon 2 and allows the tips of the fork posts 31 to precisely align with the food's point of force, improving forking efficiency. Preferably, the sharp-angled design of the fork posts 31 reduces the contact area and enhances piercing ability, while the spaced fork posts 31 balance forking stability and material utilization.

[0049] The first arc edge 11 of the handle 1 bends toward the back to form an initial support surface, and together with the front side bend of the first folded edge 12 to form a stepped three-dimensional edge. The two together form a composite anti-bending structure, which absorbs the deformation energy when the initial force is applied through the arc edge, and restricts the lateral deformation of the handle 1 through the rigid folding angle of the folded edge.

[0050] The second arc edge and the second folded edge of the spoon part 2 adopt the same construction principle as the first arc edge 11 and the first folded edge 12. The arc edge with its back side bends to fit the curvature of the spoon surface, while the folded edge on the front side forms a continuous ring support band along the outer edge of the spoon part 2, which simultaneously undertakes the longitudinal bearing and lateral limiting functions during the scooping action.

[0051] The third arc edge and the third fold edge adopt the same construction principle as the first arc edge 11 and the first fold edge 12. The third arc edge and the third fold edge of the fork post 31 extend along the long axis of the fork post 31. The third arc edge with the back side bends in line with the direction of force applied to the tip of the fork post 31, reducing the probability of edge cracking when forked. The front fold edge enhances the compressive strength of the side wall of the fork post 31 through the bending angle, preventing the fork post 31 from tilting to both sides after being compressed.

[0052] In this embodiment, the pulp molded fork and spoon achieves seamless connection of the handle 1, spoon 2, and fork 3 through an integral molding structure, forming a continuous overall framework for mechanical transmission. The bidirectional curvature design of the S-shaped connecting arc disperses the concentrated stress at the junction of the handle 1 and spoon 2 to the curved surface of the transition area. Combined with the pre-set gradient narrowing structure of the fork 3, the fork posts 31 are linearly arranged along the central axis to precisely guide the force applied during scooping. The spacing of the fork posts 31 optimizes structural stability. The first arc edge 11, the second arc edge, the third arc edge, the first folded edge 12, the second folded edge, and the third folded edge work together to form a multi-layered three-dimensional support system. Specifically, the first arc edge 11 and the first folded edge 12 of the handle 1 form a composite anti-bending structure through bending to absorb deformation and folding angle limiting; the second arc edge of the spoon 2 conforms to the curved surface curvature and works in conjunction with the annular support band of the second folded edge to synchronously bear the multi-directional load during scooping; the third arc edge of the fork post 31 conforms to the direction of force application to reduce edge cracking, and the third folded edge is reinforced with sidewalls to prevent the fork post 31 from tipping over.

[0053] This embodiment enhances local rigidity by continuously changing the geometric shape without increasing the overall thickness. The overall bending resistance is optimized by the synergistic effect of curved edge deformation energy absorption and folded edge rigid support, achieving a balance between thin-walled lightweight and high-strength support. At the same time, the S-shaped transition and gradient convergence structure further optimize the stress distribution path, avoiding the risk of fracture caused by local stress concentration, and taking into account both the efficiency of using the fork and spoon and the structural durability.

[0054] In some embodiments, the pulp molded fork and spoon further includes a first connecting rib group 4, a second connecting rib group and a third connecting rib group. The first connecting rib group 4 is distributed along the back side of the handle 1 in a first preset manner; the second connecting rib group is distributed along the back side of the spoon portion 2 in a second preset manner; and the third connecting rib group is distributed along the back side of the fork post 31 in a third preset manner.

[0055] In this embodiment, optionally, the first connecting rib plate group 4 is arranged longitudinally parallel along the back side of the handle 1 in a first preset manner. The spacing and direction between the rib plates are matched with the bending load direction when the handle 1 is subjected to force, so that multiple longitudinal support skeletons are formed when the handle 1 is bent and deformed, thereby enhancing the bending stiffness.

[0056] Optionally, the second connecting rib plate group is distributed in a cross-grid pattern along the back side of the spoon part 2 in a second preset manner. The intersection of the grid corresponds to the stress concentration point of the S-shaped transition area of ​​the spoon part 2. The cross ribs disperse the shear stress of the spoon surface load to the handle 1, while the grid gaps retain the flexibility of the curved surface of the spoon part 2.

[0057] Optionally, the third connecting rib plate group is continuously arranged along the back side of the fork post 31 in accordance with the third preset method and attached to the extension direction of the tip of the fork post 31. The thickness of the rib plate gradually decreases to the tip of the fork post 31, which not only strengthens the connection strength between the root of the fork post 31 and the spoon part 2, but also avoids the tip from being affected by the thickening of the rib plate.

[0058] In this embodiment, the first connecting rib group 4, the second connecting rib group, and the third connecting rib group are all concealed along the back side. Without interfering with the function of the front arc edge and folded edge, the rib direction is matched with the deformation trend of the matrix to form a directional reinforcement system that complements the main structure, further suppressing local deformation of the matrix.

[0059] In some embodiments, the first preset mode, the second preset mode, and the third preset mode are configured to be distributed in a grid-like cross pattern; or, the first preset mode, the second preset mode, and the third preset mode are configured to be distributed in a parallel array along the extension direction of the central axis of the fork and spoon; or, the first preset mode, the second preset mode, and the third preset mode are configured to be distributed in a vertical array along the extension direction of the central axis of the fork and spoon.

[0060] In this embodiment, the first, second, and third preset modes can be configured according to the stress characteristics of different areas of the fork and spoon. When a grid-like cross distribution is adopted, the first connecting rib group 4 on the back of the handle 1 disperses the multi-directional bending stress generated when gripping through the cross nodes; the cross lines of the second connecting rib group on the back of the spoon 2 match the stress transmission path of the S-shaped transition zone, uniformly transmitting the spoon surface load to the handle 1; the cross points of the third connecting rib group on the back of the fork post 31 are concentrated at the root of the fork post 31, strengthening the shear-resistant connection between the fork post 31 and the spoon 2.

[0061] When a parallel array distribution is adopted along the extension of the central axis, each rib group extends along the main load direction. The first connecting rib group 4 of the handle 1 is arranged in parallel to resist longitudinal bending. The second connecting rib group of the spoon 2 is parallel to the central axis to guide the linear transmission of the scooping load. The third connecting rib group of the fork 31 is parallel to the tip direction to enhance puncture stability.

[0062] When an array distribution perpendicular to the central axis is adopted, the ribs are arranged laterally to form multiple ring supports. The first connecting rib group 4 of the handle 1 suppresses lateral deformation, the second connecting rib group of the spoon 2 forms circumferential constraint around the edge of the spoon surface, and the third connecting rib group of the fork 31 is perpendicular to the direction of force to prevent the fork 31 from shifting laterally.

[0063] This embodiment uses a grid-like, intersecting, parallel, or vertical array of ribs to directionally strengthen the fork-spoon matrix structure. Specifically, the intersecting grid distribution utilizes nodes to disperse multi-directional bending stress in the handle 1, matches the stress path in the S-shaped transition zone of the spoon 2, and strengthens the shear-resistant connection at the base of the fork column 31. The parallel array extends along the central axis to resist longitudinal bending, guides the linear transmission of the scooping load, and enhances the puncture stability of the fork column 31. The vertical array forms a ring support to suppress lateral deformation, constrain circumferential displacement of the spoon surface, and prevent lateral displacement of the fork column 31. This embodiment flexibly configures the rib orientation according to the principal stress direction of each region, maintaining thin-walled lightweight while optimizing structural stability and load transfer efficiency through directional enhancement of bending, shear, and torsional resistance.

[0064] In some embodiments, there are multiple first connecting rib groups 4, which are distributed at intervals along the axial direction of the handle 1 on the back side of the handle 1; there are multiple second connecting rib groups, which are distributed at intervals along the axial direction of the spoon portion 2 on the back side of the spoon portion 2; and there are multiple third connecting rib groups, which are distributed at intervals along the axial direction of the fork post 31 on the back side of the fork post 31.

[0065] In this embodiment, multiple first connecting rib groups 4 are spaced apart along the axial direction of the handle 1 to form a multi-segment support unit along the length of the handle 1. The gap between adjacent first connecting rib groups 4 allows the handle 1 to produce controllable elastic deformation when pressure is applied, while the first connecting rib groups 4 themselves resist longitudinal bending stress through axial arrangement, avoiding the middle section of the handle 1 from breaking due to excessive local stress.

[0066] The second connecting ribs on the back side of the spoon 2 are arranged at intervals along the axial direction. Preferably, their spacing matches the curvature change of the S-shaped transition zone of the spoon 2. The second connecting ribs are densely distributed at the point where the curvature of the spoon surface is the largest. Through segmented support, the scooping load is distributed and transferred to the handle 1, reducing the risk of collapse in the middle of the spoon surface.

[0067] The third connecting ribs on the back side of the fork 31 are spaced apart along the axial direction. Preferably, the third connecting ribs are distributed in the key connection area between the root and tip of the fork 31. By segmenting along the axial direction, the connection strength between the fork 31 and the spoon 2 is strengthened. At the same time, continuous ribs are avoided so that the overall rigidity of the fork 31 is too high, which would affect the flexibility when the tip is punctured.

[0068] This embodiment utilizes axially spaced ribs to form a segmented reinforcement structure on the back of the handle 1, spoon 2, and fork 31. This retains the elastic deformation capability of the base material while using multiple support units to directionally resist bending, shearing, and tensile stresses in critical areas. The handle 1 ribs suppress longitudinal bending, the spoon 2 ribs match the curvature to distribute the load, and the fork 31 ribs reinforce the root connection and maintain the flexibility of the tip. This achieves a synergistic improvement in local strength and overall structural adaptability while maintaining lightweight design.

[0069] Please see Figures 5 to 6 In some embodiments, each first connecting rib group 4 includes two oppositely arranged first connecting ribs, each first connecting rib being used to connect the first arc edge 11 and the first folded edge 12; each second connecting rib group includes two oppositely arranged second connecting ribs, each second connecting rib being used to connect the second arc edge and the second folded edge; each third connecting rib group includes two oppositely arranged third connecting ribs, each third connecting rib being used to connect the third arc edge and the third folded edge.

[0070] In this embodiment, the two oppositely arranged first connecting ribs of each first connecting rib group 4 are respectively connected to the first arc edge 11 and the first folded edge 12 of the handle 1 to form a closed support frame. Through the rigid connection between the two ends of the rib and the arc edge and the folded edge, the bending stress of the edge of the handle 1 is converted into the tensile and compressive load of the rib, thereby enhancing the torsional resistance of the handle 1.

[0071] Preferably, the two second connecting ribs of the second connecting rib group symmetrically connect the second arc edge and the second folded edge of the spoon part 2, forming a continuous cross support network on the back side of the spoon part 2. The shearing effect of the spoon surface load on the S-shaped transition zone is dispersed by the included angle between the ribs, thereby reducing edge deformation.

[0072] Preferably, the two third connecting ribs of the third connecting rib group fix the third arc edge and the third fold edge of the fork post 31 respectively, establishing a bidirectional constraint along the long axis of the fork post 31. The bending direction of the ribs and the arc edge is consistent, which avoids cracking at the connection between the fold edge and the arc edge when the tip of the fork post 31 is subjected to force, while maintaining the morphological stability of the fork post 31 during puncture.

[0073] In this embodiment, a closed support frame is formed by connecting the first arc edge 11 and the first folded edge 12 with the first connecting rib group 4, the second arc edge and the second folded edge with the second connecting rib group, and the third arc edge and the third folded edge with the third connecting rib group. This transforms the edge bending stress into axial force through the first connecting rib group 4, the second connecting rib group, and the third connecting rib group, creating a multi-layered anti-deformation mechanism. The first connecting rib group 4 of the handle 1 suppresses torsional deformation, the second connecting rib group of the spoon part 2 disperses the shear stress in the S-shaped transition zone, and the third connecting rib group of the fork 31 stabilizes the piercing force path. While maintaining the original thin-walled lightweight design, this significantly improves the overall structural strength and durability.

[0074] In some embodiments, each first connecting rib group 4 includes a first reinforcing rib, which is disposed perpendicular to the extension direction of the central axis of the fork and spoon on the back side of the handle 1; each second connecting rib group includes a second reinforcing rib, which is disposed perpendicular to the extension direction of the central axis of the fork and spoon on the back side of the spoon portion 2; each third connecting rib group includes a third reinforcing rib, which is disposed perpendicular to the extension direction of the central axis of the fork and spoon on the back side of the fork post 31.

[0075] In this embodiment, the first reinforcing rib is arranged laterally on the back side of the handle 1 perpendicular to the extension line of the central axis of the fork and spoon, forming a lateral bending support belt. By blocking the continuous transmission path of longitudinal bending stress of the handle 1, the local bending deformation is limited within the spacing between adjacent reinforcing ribs, thereby improving the handle 1's ability to resist lateral sway.

[0076] The direction of the second reinforcing rib is orthogonal to the arc extension direction of the 2S-shaped transition zone of the spoon. By laterally cutting off the shear stress flow transmitted from the spoon surface load to the S-shaped connection, the risk of deformation caused by stress superposition in the transition zone is reduced.

[0077] The arrangement direction of the third reinforcing rib intersects with the force direction of the tip of the fork 31. When the fork pierces the food, it inhibits the lateral twisting at the connection between the root of the fork 31 and the spoon 2 through lateral constraint, while avoiding excessive restriction of the flexibility of the fork 31 by the continuous longitudinal ribs, and maintaining the smoothness of the piercing action.

[0078] This embodiment utilizes a first, second, and third reinforcing rib perpendicular to the central axis to form multiple transversely truncated reinforcement structures on the handle 1, spoon 2, and the back of the fork 31. These structures directionally block the longitudinal stress transmission path and disperse concentrated loads in key connection areas. The synergistic effect of the handle 1's anti-lateral sway, the spoon 2's S-shaped transition protection, and the fork 31's anti-torsion function further optimizes the bending and shear resistance of the substrate while retaining the original advantages of the curved and folded edges, thus improving the overall structural reliability of the fork and spoon.

[0079] In some embodiments, the inner side of the handle 1 is further provided with a first groove 13; the inner side of the spoon portion 2 is further provided with a second groove 21, and the first groove 13 and the second groove 21 are in communication.

[0080] In this embodiment, the first groove 13 on the inner side of the handle 1 extends along the gripping direction, reducing the accumulation of material in the middle of the handle 1 while forming a longitudinal reinforcing rib effect through the groove wall to maintain bending stiffness; the second groove 21 on the inner side of the spoon 2 is distributed along the curvature of the spoon surface, and the groove depth gradually changes to adapt to the scooping load distribution. A stress buffer zone is formed at the groove connection to disperse the bending stress of the S-shaped transition zone.

[0081] In this embodiment, the first groove 13 and the second groove 21 reduce the amount of material used, while strengthening the rigidity of the substrate and optimizing the stress distribution through the shape of the groove, thus achieving a dual improvement in lightweighting and structural stability.

[0082] In some embodiments, the distance between the first groove 13 and the edge of the handle 1 is a fixed value; the distance between the second groove 21 and the edge of the spoon portion 2 is a fixed value.

[0083] In this embodiment, the first groove 13 maintains a fixed distance from the edge of the handle 1, forming a sidewall structure of uniform thickness. This reduces material weight while creating a continuous bending support surface through the equidistantly distributed groove walls. The fixed distance between the second groove 21 and the edge of the spoon 2 maintains the integrity of the edge arc and fold, preventing the groove from weakening the edge reinforcement system. At the same time, the equidistant arrangement of the grooves ensures that the load on the spoon surface is evenly transferred to the S-shaped transition zone.

[0084] This embodiment establishes a balance between weight reduction and maintaining the strength of the edge structure by setting a fixed spacing between the first groove 13 and the second groove 21, ensuring the simultaneous optimization of the lightweight matrix and the stress bearing capacity of the key areas.

[0085] In some embodiments, each fork post 31 is further provided with a third groove on its inner side, and the plurality of third grooves are connected to the second groove 21.

[0086] In this embodiment, the third groove on the inner side of the fork 31 extends along the long axis of the fork 31, and the groove depth is adapted to the puncture force distribution of the fork 31 tip, reducing the weight of the fork 31 while maintaining the connection strength at the root; furthermore, the third groove is connected with the second groove 21 of the spoon 2 to form a continuous weight reduction channel, so that the bending stress generated when the fork 31 is subjected to force is evenly diffused along the groove path to the S-shaped transition area of ​​the spoon 2.

[0087] This embodiment enhances the overall structural continuity of the fork and spoon by adding multiple third grooves that communicate with the second groove 21, optimizes the stress transmission path from the fork post 31 to the spoon part 2, and maintains the mechanical balance between puncture and load-bearing while reducing the amount of material used.

[0088] In some embodiments, the end of the fork post 31 is provided with a plurality of fork pins 32 arranged in parallel, with a gap between two adjacent fork pins 32; the edge of each fork pin 32 is provided with a fourth arc edge and a fourth folded edge from the inside to the outside, the fourth arc edge is bent toward the back side of the fork spoon, and the fourth folded edge is bent toward the front side of the fork spoon.

[0089] In this embodiment, the parallel arrangement of the fork pins 32 at the ends of the fork pins 31 reduces puncture resistance by spacing and prevents food from sticking together; the fourth arc edge of each fork pin 32 bends toward the back to form an arc-shaped support surface, dispersing the puncture reaction force; the fourth folded edge bends toward the front to form a rigid fold, enhancing the lateral bending stiffness of the fork pin 32 and preventing the pin body from curling and deforming when picking up hard objects.

[0090] This embodiment improves piercing efficiency and structural strength through the synergistic effect of the fourth arc edge and the fourth fold edge of the fork needle 32. The spaced fork needles 32 optimize the stability of food picking, achieving dual enhancement of functionality and durability of the fork part 3 while maintaining a lightweight design. In some more optimized embodiments, a fork tooth (not shown) smaller than the fork needle 32 is also provided at the end of the fork needle 32, which makes it easier to pierce food with the fork spoon of this application.

[0091] By using the above technical solution, this utility model differs from the prior art and has the following beneficial effects:

[0092] The pulp molded fork and spoon provided by this utility model seamlessly connects the handle 1, spoon 2, and fork 3 through an integral molding structure, forming a continuous overall frame for mechanical transmission. The bidirectional curvature design of the S-shaped connecting arc disperses the concentrated stress at the joint point of the handle 1 and spoon 2. The pre-set gradient narrowing of the fork 3 ensures that the fork posts 31 are precisely arranged along the central axis, and the spacing of the fork posts 31 optimizes structural stability. The arc edges and folded edges of the handle 1, spoon 2, and fork posts 31 work together to form a multi-layer three-dimensional support system. Specifically, the first arc edge 11, the second arc edge, and the third arc edge absorb deformation energy through bending, and the first folded edge 12, the second folded edge, and the third folded edge limit lateral displacement with rigid folds. The composite bending-resistant structure improves local rigidity under thin-walled conditions. The first connecting rib group 4, the second connecting rib group, and the third connecting rib group distributed on the back side are oriented according to the regional stress characteristics. They block multi-directional stress transmission paths through grid intersection, parallel, or vertical array distribution, thereby enhancing bending, shear, and torsional resistance.

[0093] The first groove 13, the second groove 21, and the third groove are connected, reducing material usage and forming a stress buffer channel. The first groove 13 and the second groove 21 are arranged at a fixed interval to maintain the integrity of the edge reinforcement system. The fork pins 32 at the ends of the fork pins 31 disperse the puncture reaction force through the fourth arc edge, and the fourth folded edge strengthens the lateral bending stiffness. The spaced arrangement reduces resistance and adhesion. The above structures work together to achieve a balance between lightweight and high strength through geometric optimization without increasing the thickness. At the same time, the S-shaped transition, gradient narrowing, and directional reinforcement of the ribs further disperse stress concentration, taking into account efficiency, structural durability, and environmental protection.

[0094] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this utility model, this should not limit the scope of patent protection of this utility model. Any technical solutions that are based on the essential concept of this utility model, utilize the content described in the text and drawings of this utility model to make equivalent structural or procedural substitutions or modifications, as well as any technical solutions that directly or indirectly implement the above embodiments in other related technical fields, such as molds, tooling, etc., that are compatible with this application, are all included within the scope of patent protection of this utility model.

Claims

1. A pulp molded fork and spoon characterized by, The spoon part and the fork part are integrally formed and sequentially connected; In the projection direction of the fork from front to back, the connection between the spoon part and the handle part is a first connection curvature, and the edge of the spoon part further has a second connection curvature, which is connected with the first connection curvature to form an S shape; The connection between the fork part and the spoon part gradually approaches the extension line of the central axis of the fork towards a preset gradient, and the fork part has a plurality of spaced fork columns, the end of the fork column is a pointed end; The edge of the handle part is sequentially provided with a first arc edge and a first folded edge from inside to outside, the first arc edge is curved towards the back side of the fork, and the first folded edge is bent towards the front side of the fork; The edge of the spoon part is sequentially provided with a second arc edge and a second folded edge from inside to outside, the second arc edge is curved towards the back side of the fork, and the second folded edge is bent towards the front side of the fork; The edge of each fork column is sequentially provided with a third arc edge and a third folded edge from inside to outside, the third arc edge is curved towards the back side of the fork, and the third folded edge is bent towards the front side of the fork; The end of the fork column is provided with a plurality of parallel fork needles, and there is a space between adjacent two fork needles; The edge of each fork needle is sequentially provided with a fourth arc edge and a fourth folded edge from inside to outside, the fourth arc edge is curved towards the back side of the fork, and the fourth folded edge is bent towards the front side of the fork.

2. The pulp molded fork and spoon according to claim 1, characterized by Further comprising: A first connection rib plate group, the first connection rib plate group is distributed in a first preset manner along the back side of the handle; A second connection rib plate group, the second connection rib plate group is distributed in a second preset manner along the back side of the spoon part; A third connection rib plate group, the third connection rib plate group is distributed in a third preset manner along the back side of the fork column.

3. The pulp molded fork and spoon according to claim 2, characterized by The first preset manner and / or the second preset manner and / or the third preset manner are configured to be distributed in a grid shape; Alternatively, the first preset manner and / or the second preset manner and / or the third preset manner are configured to be distributed in parallel array along the extension line of the central axis of the fork; Alternatively, the first preset manner and / or the second preset manner and / or the third preset manner are configured to be distributed in vertical array along the extension line of the central axis of the fork.

4. The pulp molded fork and spoon according to claim 2, characterized by The number of the first connection rib plate group is a plurality, and a plurality of the first connection rib plate groups are spaced along the axial direction of the handle and distributed on the back side of the handle; The number of the second connection rib plate group is a plurality, and a plurality of the second connection rib plate groups are spaced along the axial direction of the spoon part and distributed on the back side of the spoon part; The number of the third connection rib plate group is a plurality, and a plurality of the third connection rib plate groups are spaced along the axial direction of the fork column and distributed on the back side of the fork column.

5. The pulp molded fork and spoon according to claim 4, characterized by Each of the first connection rib plate groups comprises: Two oppositely arranged first connection rib plates, each of the first connection rib plates is used to connect the first arc edge and the first folded edge; Each of the second connection rib plate groups comprises: Two oppositely arranged second connection rib plates, each of the second connection rib plates is used to connect the second arc edge and the second folded edge; Each of the third connection rib plate groups comprises: Two oppositely arranged third connection rib plates, each of the third connection rib plates is used to connect the third arc edge and the third folded edge.

6. The pulp molded fork and spoon according to claim 4, characterized by Each of the first connection rib plate groups comprises: A first reinforcing rib is arranged on the back side of the handle perpendicularly to the direction of the extension line of the central axis of the fork-spoon; Each of the second connecting rib plate groups comprises: A second reinforcing rib is arranged on the back side of the spoon perpendicularly to the direction of the extension line of the central axis of the fork-spoon; Each of the third connecting rib plate groups comprises: A third reinforcing rib is arranged on the back side of the fork column perpendicularly to the direction of the extension line of the central axis of the fork-spoon.

7. The pulp molded fork and spoon according to claim 1, characterized by The inner side of the handle is further provided with a first groove; The inner side of the spoon is further provided with a second groove, and the first groove and the second groove are in communication.

8. The pulp molded fork and spoon according to claim 7, characterized by The distance between the first groove and the edge of the handle is a constant value; And / or, the distance between the second groove and the edge of the spoon is a constant value.

9. The pulp molded fork and spoon according to claim 7, characterized by The inner side of each of the fork columns is further provided with a third groove, and a plurality of the third grooves are in communication with the second groove.

10. A mold for producing a pulp molded fork, characterized by The paper pulp molded fork-spoon is adapted to any one of claims 1-9.

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