CN220219482U - Chair and mesh frame and manufacturing die thereof - Google Patents

Abstract

The utility model discloses a chair and a screen cloth frame and a manufacturing die thereof, wherein the die comprises a lower die, a first die frame, a second die frame and a lower die which are sequentially arranged, an upper die core is fixed at the center of the upper die, and a lower die core is fixed at the center of the lower die; the lower die, the second die frame and the upper die are matched to form a forming cavity for injection molding of the annular support, the first die frame and the second die frame are matched to form a first gap for accommodating mesh fabrics, the second die frame and the lower die are matched to form a second gap for accommodating mesh fabrics and a cutting surface for cutting off mesh fabrics, and the lower die and the upper die are matched to form a mesh fabric gap for accommodating mesh fabrics. The die has reasonable and ingenious structural design, forms the mesh frame by integrally injection molding the mesh and the annular support, and has good molding quality and convenient operation. The mesh fabric frame is nested on the frame body of the chair component from outside to inside, so that the workload and the difficulty of installing the mesh fabric are reduced, the manufacturing cost is greatly reduced, and the production quality is fully ensured.

Description

Chair and mesh frame and manufacturing die thereof

Technical Field

The utility model belongs to the technical field of furniture and the technical field of injection molds, relates to a chair and a mesh frame thereof, and particularly relates to a manufacturing mold of the mesh frame.

Background

In the prior art chair structure, a groove is formed on the surface of a frame body in a ring manner, and the mesh (or the cushion) is combined with the frame body only by a pressing strip or the frame body in a combined pressing manner, so that the combination degree is not firm, and when a user sits on the mesh, the mesh can be pulled and moved at the combination position with the frame body due to the gravity, and the mesh can be loosened after long-term use, so that the comfort of sitting on the mesh is reduced.

Therefore, in order to firmly combine the mesh with the frame, nails are nailed at the joint of the mesh and the frame, so that the situation that the mesh falls off from the frame can be effectively avoided, but the nailing mode is quite time-consuming, and is not beneficial to mass implementation of manufacturing.

Patent document with publication number CN201332857Y discloses a mesh chair frame and mesh chair combined structure, which combines mesh cloth (or elastic mesh body) with frame body by injection molding and bagging, so as to increase the combination stability of mesh cloth and frame body: the method comprises the steps of performing injection molding on a preset inner frame part of a chair frame, tightening mesh cloth on the inner frame of the chair frame, performing injection molding on an outer frame of the chair frame by a filling layer, and wrapping and fixing the edges of the mesh cloth firmly; or as disclosed in the patent document with the publication number TW200800077A, the elastic net body is cut into the appearance of the seat and back cushion body to be manufactured, the frame strip is molded corresponding to the edge of the elastic net body, the elastic net body is correspondingly coated to form the frame strip of the frame edge, the frame strip is combined and shaped, the elastic net body and the frame strip which are combined and shaped into a whole are placed into a die, and the frame strip and the elastic net body at the frame edge are subjected to injection molding of the plastic layer to obtain the finished product.

However, the following problems exist in the manner that the mesh cloth and the frame body are combined by tightening and fixing and then packing:

1. before injection molding and pouring, the mesh cloth is required to be fastened on the frame body or the frame strip, the operation is complex and complicated, the positioning difficulty is high, manual operation is required, and the defects of insufficient mesh cloth tightness, insufficient edge, and the like are unavoidable.

2. The frame body or the frame strip of the tightening fixed mesh cloth is put into the mould for injection molding, the melting point of the coating layer material is different from that of the frame body and the mesh cloth, and the manufacturing cost is high, for example, the frame body is large in size and weight, the difficulty of taking out and putting in the frame body from the mould is high, the manufacturing cost is increased, and the production quality is influenced.

Therefore, the inventor proposes to integrally injection-mold the mesh cloth and the annular bracket to form a mesh cloth frame, and nest the mesh cloth frame on the frame body of the chair component from outside to inside, so that the work load and the difficulty of installing the mesh cloth are reduced, the manufacturing cost is greatly reduced, and the production quality is fully ensured. The utility model relates to a manufacturing die of a mesh frame.

Disclosure of Invention

In order to solve the technical problems, one of the purposes of the utility model is to provide a manufacturing die for a mesh frame with reasonable and ingenious structural design.

The second object of the present utility model is to provide a mesh frame manufactured by using the manufacturing mold.

The utility model further provides a chair, and the mesh frame is adopted.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the manufacturing die for the screen cloth frame comprises an upper die (408), a first die frame (403), a second die frame (407) and a lower die (402) which are sequentially arranged, wherein an upper die core (4081) is fixed at the center of the upper die (408), and a lower die core (4021) is fixed at the center of the lower die (402); the first die frame (403) is arranged between the lower die (402) and the second die frame (407), the die opening moves relative to the lower die (402), and the die closing is sleeved outside the lower die core (4021); the second die frame (407) is arranged between the first die frame (403) and the upper die (408), the die opening moves relative to the lower die (402), and the die closing is sleeved outside the lower die core (4021); the lower die (402), the second die frame (407) and the upper die (408) are matched in a die mode to form a forming cavity for injection molding of the annular support (2), the first die frame (403) and the second die frame (407) are matched in a die mode to form a first gap (4071) for accommodating the mesh fabric (400), the second die frame (407) and the lower die (402) are matched in a die mode to form a second gap (4072) for accommodating the mesh fabric (400) and a cutting face (4073) for cutting off the mesh fabric (400), and the lower die (402) and the upper die (408) are matched in a die mode to form a mesh gap for accommodating the mesh fabric (1).

Preferably, the second die frame (407) and the lower die (402) are matched in a die mode to form a clamping gap (4074) for clamping the free edge part of the mesh cloth (1), and the clamping gap (4074) is located between the cutting surface (4073) and the forming cavity.

Preferably, the mesh gap includes: a third gap (4082) formed by die locking and matching of the lower die (402) and the upper die (408) and used for accommodating the edge of the mesh cloth (1), a fourth gap (4083) formed by die locking and matching of the lower die core (4021) and the upper die (408) and used for accommodating the mesh cloth (1), and a fifth gap (4084) formed by die locking and matching of the lower die core (4021) and the upper die core (4081) and used for accommodating the mesh cloth (1).

Preferably, a demolding surface (4075) is arranged between the second mold frame (407) and the upper mold (408); the third gap (4082) is tightly matched with the mesh fabric (400); the front end of the lower mold core (4021) is inserted into the groove of the upper mold (408) so as to push and pull the mesh fabric (400) to control the loosening degree of the mesh (1) of the formed mesh frame.

Preferably, the upper die (408) is mounted on an upper die fixing plate (410), a hot runner plate (409) and a gate assembly (411) are mounted on the upper die fixing plate (410), and the hot runner plate (409) is fixed on the upper die (408) and the upper die fixing plate

(410) Between, the gate component (411) passes through the hot runner plate (409) and the upper die (408) and is arranged on the upper die

(408) The plurality of feeding gates are communicated with the forming cavity, and the hot runner plate (409) is heated by oil temperature or electricity; and a thimble assembly (412) is further arranged between the upper die (408) and the hot runner plate (409), the thimble assembly (412) comprises a thimble, a positioning plate and a push plate, and the push plate is driven to move by a thimble driving piece so as to push the thimble to eject, so that the screen cloth frame formed by injection molding is demoulded from the upper die (408).

Preferably, the screen cloth feeding device (401) is used for feeding screen cloth fabric (400), and the screen cloth feeding device (401) is arranged on the lower die (402), the first die frame (403) or the second die frame (407).

Preferably, the lower die (402) cavity is arranged around the lower die core (4021), and sequentially comprises a first annular groove (4022), a first annular protrusion (4023) and a second annular groove (4024) from outside to inside, wherein the first annular groove (4022) is matched with the second die frame (407) to form a clamping gap (4074) for clamping the edge free part of the mesh (1), the first annular protrusion (4023) is used for forming a part of a groove (204) of the annular bracket (2), and the second annular groove (4024) is used for forming a clamping convex part (203) of the annular bracket (2); the second mould frame (407) cavity comprises a third annular groove (4076) and a second annular bulge (4077), the third annular groove (4076) is matched with the upper mould (408) to form the outer wrapping part (201) of the annular support (2), and the second annular bulge (4077) is used for forming the other part of the groove (204) of the annular support (2).

Preferably, the cavity of the upper die (408) comprises a third annular protrusion (4085) and a fourth annular groove (4086), the third annular protrusion (4085) is matched with the lower die (402) to form the embedded part (202) of the annular support (2), and the fourth annular groove (4086) is matched with the third annular groove (4076) of the second die frame (407) to form the outer wrapping part (201) of the annular support (2).

A mesh frame for a chair, made from a manufacturing mold for a mesh frame as described above.

A chair comprising a mesh frame for a chair as described above.

By adopting the technical scheme, the die has reasonable and ingenious structural design, the mesh cloth and the annular support are integrally injection molded to form the mesh cloth frame, the molding quality is good, and the operation is convenient. The mesh fabric frame is nested on the frame body of the chair component from outside to inside, so that the workload and the difficulty of installing the mesh fabric are reduced, the manufacturing cost is greatly reduced, and the production quality is fully ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not limit the application.

Figure 1 is a schematic view of the chair component of the present utility model.

Fig. 2 is a cross-sectional view A-A of fig. 1.

Fig. 3 is an enlarged view at I of fig. 2.

Figure 4 is a perspective view of the chair component.

Figure 5 is an exploded view of the chair component.

Fig. 6 is one of the perspective views of the screen cloth frame (the unused mounting state).

Fig. 7 is a second perspective view of a screen frame (in an unused mounted state).

Fig. 8 is a schematic structural view of the mesh frame mold (mold-open state).

Fig. 9 is a schematic structural view of the mesh frame mold (mold-closed state).

Fig. 10 is a longitudinal sectional view (mold clamping state) of the mesh frame mold.

Fig. 11 is an enlarged view of fig. 10 at a.

Fig. 12 is a cross-sectional view of the mesh frame mold (mold-closed state).

Fig. 13 is an enlarged view at B in fig. 12.

Fig. 14 is a schematic structural view of a lower mold in the mesh frame mold.

Fig. 15 is a longitudinal sectional view of the lower die in the mesh frame die.

Fig. 16 is a schematic structural view of a first frame in the mesh frame mold.

Fig. 17 is a schematic structural diagram of a second frame in the frame mold.

Fig. 18 is a second schematic structural view of a second frame in the frame mold.

Fig. 19 is a longitudinal cross-sectional view of a second frame in the frame mold.

Fig. 20 is a schematic structural view of an upper die in a mesh frame mold.

1, a mesh cloth; 101. edges; 2. an annular bracket; 201. an outer wrapping part; 202. an embedding part; 203. a convex clamping part; 204. a groove; 3. a frame; 301. a frame body; 302. a flange portion; 303. a hook part; 304. a caulking groove; 305. windowing; 400. a mesh fabric; 401. a mesh feeding device; 402. a lower die; 4021. a lower mold core; 4022. a first annular groove; 4023. a first annular projection; 4024. a second annular groove; 403. a first mold frame; 404. a guide post; 405. a spring; 406. a driving member; 407. a second mold frame; 4071. a first gap; 4072. a second gap; 4073. cutting a surface; 4074. a clamping gap; 4075. a demolding surface; 4076. a third annular groove; 4077. a second annular projection; 408. an upper die; 4081. an upper mold core; 4082. a third gap; 4083. a fourth gap; 4084. a fifth gap; 4085. a third annular projection; 4086. a fourth annular groove; 409. a hot runner plate; 410. an upper die fixing plate; 411. a gate assembly; 412. and the thimble assembly.

Detailed Description

The utility model will be further described with reference to the drawings and examples.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise, and furthermore it is to be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

For convenience of description, the present utility model defines "up, down, inside, outside" in a state where the mesh cloth is mounted on the frame of the chair component:

the surface of the mesh cloth, which is used for contacting the human body, is defined as an upper surface, namely the mesh cloth contacts the human body, and the opposite back surface of the upper surface of the mesh cloth is defined as a lower surface;

the peripheral edges of the web are defined as "outer", and the center of the web is defined as "inner", as opposed.

Example 1:

the mesh frame for the chair shown in fig. 6 and 7 comprises a mesh 1 and an annular support 2, wherein the peripheral edge 101 of the mesh 1 is embedded in the annular support 2, and the annular support 2 is fixedly connected with the peripheral edge 101 of the mesh 1 in an integral manner through an insert injection molding mode.

In this embodiment, as shown in fig. 3, the annular support 2 is integrally formed with an embedded portion 202 extending from outside to inside, the embedded portion 202 is annular, and the peripheral edge 101 of the mesh 1 is inserted into and fixed in the embedded portion 202. The annular bracket 2 has a convex clamping portion 203 integrally formed on the lower surface, and the convex clamping portion 203 is annular. The lower surface of the annular bracket 2 is integrally formed with a groove 204, and the groove 204 is annular.

In this embodiment, the outer wrapping portion 201 extending from bottom to top is integrally formed on the annular support 2, the outer wrapping portion 201 is annular, and the junction between the peripheral edge of the mesh 1 and the annular support 2 is located inside the outer wrapping portion 201.

In this embodiment, the mesh 1 is in a relaxed state as shown in fig. 6 and 7, before the mesh frame is installed and used, i.e., in a natural state.

A chair component as shown in fig. 1 to 5, comprising a frame 3, the frame 3 being a frame for a seat, backrest, lumbar or headrest, and further comprising a mesh frame for a chair as described above, the mesh 1 wrapping around the top of the frame 3, and an annular bracket 2 nested outside the top of the frame 3. In this embodiment, the frame is a frame of a seat.

The mesh cloth and the annular support are integrally formed into the mesh cloth frame in an insert injection molding mode, so that automatic continuous production can be realized, positioning accuracy of the peripheral edges of the mesh cloth can be guaranteed, and the relaxation degree of the mesh cloth is guaranteed. The mesh frame is nested on the frame body of the chair component from outside to inside, so that the mesh frame is installed on the frame body, the mesh is fully tensioned, the installation and the manufacture are convenient, and when the mesh supports a human body, acting force born by the mesh can be converted into force for expanding the annular support, and the self strength of the annular support can also bear the stress of the mesh better, so that the tensioning degree of the mesh is further ensured, and the service life of the mesh is further prolonged. Thereby reducing the installation workload and the installation difficulty of the mesh cloth, greatly reducing the manufacturing cost and fully ensuring the production quality.

In this embodiment, as shown in fig. 3 and fig. 5, a flange portion 302 is integrally formed at the top of the frame body 3 and extends outwards from inside to outside, the flange portion 302 is annular, so that an annular caulking groove 304 is formed between the frame body 301 and the flange portion 302, the embedding portion 202 of the annular bracket 2 is fixedly embedded in the caulking groove 304, and the peripheral edge 101 of the mesh 1 wraps the flange portion 302 of the frame body 3 and enters the caulking groove 304; the outer peripheral portion 201 of the ring-shaped holder 2 is surrounded by the flange portion 302 of the frame body 3, and the mesh cloth 1 is passed therebetween and clamped. Therefore, the mesh edge is clamped through multiple bending nesting in the process of wrapping the top of the frame body, so that the tensioning degree of the mesh can be increased, the structural strength of the annular support is higher, a part of acting force born by the mesh is born by the flange part of the frame body, and the tensioning degree and the service life of the mesh are further guaranteed.

In this embodiment, preferably, the frame body 3 is integrally formed with a plurality of hook portions 303 in the caulking groove 304, and the hook portions 303 enter the groove 204 of the annular bracket 2 and are in snap fit with the locking convex portions 203; like this, not only can increase the joint fixation intensity of ring support and framework, can avoid the embedded part of ring support to deviate from the caulking groove moreover to also can avoid ring support to be propped big or distortion, make the screen cloth atress also can be shared by a plurality of buckle structures, further guaranteed screen cloth tensioning degree and life.

In this embodiment, the peripheral edge of the mesh cloth 1 preferably extends from the inner side surface of the embedded portion 202 to the groove 204. Thus, the connection strength of the mesh cloth and the annular support can be enhanced, and after the mesh cloth frame is mounted on the frame body of the chair component, the edge depth of the mesh cloth is embedded into the caulking groove and the mesh cloth is not separated from the annular support.

In this embodiment, the plurality of hook portions 303 are preferably uniformly distributed on the lower side wall of the caulking groove 304, and the flange portion 302 is provided with windows 305 corresponding to the positions of the hook portions 303 one by one, so that the hook portions are integrally formed on the frame body.

The utility model also discloses a chair comprising a chair component as described above.

The utility model also discloses a die for manufacturing the mesh fabric frame, which comprises an upper die 408, a first die frame 403, a second die frame 407 and a lower die 402 which are sequentially arranged, wherein an upper die core 4081 is fixed at the center of the upper die 408, and a lower die core 4021 is fixed at the center of the lower die 402; the first die frame 403 is arranged between the lower die 402 and the second die frame 407, and moves relative to the lower die 402 when the die is opened, and is sleeved outside the lower die core 4021 when the die is closed; the second mold frame 407 is provided between the first mold frame 403 and the upper mold 408, and moves relative to the lower mold 402 when the mold is opened, and is fitted over the lower mold core 4021 when the mold is closed.

As shown in fig. 10, 11, 12 and 13, the lower mold 402, the second mold frame 407 and the upper mold 408 are matched in a mold cavity for injection molding the annular support 2, the first mold frame 403 and the second mold frame 407 are matched in a mold cavity for accommodating the mesh fabric 400, the second mold frame 407 and the lower mold frame 402 are matched in a mold cavity for accommodating the mesh fabric 400, the cutting surface 4073 for cutting the mesh fabric 400 and the clamping gap 4074 for clamping the free edge portion of the mesh fabric 1 are formed, the lower mold 402 and the upper mold 408 are matched in a mold cavity for accommodating the edge of the mesh fabric 1 are formed in a mold cavity for accommodating the third gap 4082, the lower mold core 4021 and the upper mold core 408 are matched in a mold cavity for accommodating the fourth gap 4083 of the mesh fabric 1 are formed in a mold cavity for accommodating the mesh fabric 1, and the demolding surface 4075 is formed between the second mold frame 407 and the upper mold 408.

In this way, when the mold is opened, the lower mold 402, the first mold 403, the second mold 407, and the upper mold 408 are separated, and the mesh frame is taken out from between the second mold 407 and the upper mold 408; the mesh fabric 400 is put between the first die frame 403 and the second die frame 407, between the lower die 402 and the upper die 408, and between the lower die core 4021 and the upper die core 4081; when the die is closed, the second die frame 407 and the lower die 402 cut the mesh fabric 400 at the cutting surface 4073, the first gap 4071 and the second gap 4072 positioned outside the cutting surface 4073 are used for containing the waste materials left by cutting the mesh fabric 400, and the third gap 4082, the fourth gap 4083 and the fifth gap 4084 positioned inside the cutting surface 4073 are used for containing the mesh fabric 1; the free edge part of the mesh cloth 1 is clamped and positioned through the clamping gap 4074 at the inner side of the cutting surface 4073, and the clamping gap 4074 and the third gap 4082 are respectively positioned at two sides of the forming cavity, so that the edge of the mesh cloth passes through the forming cavity, and the injection-molded annular support 2 and the edge of the mesh cloth 1 are fused and connected into a whole.

To avoid leakage of the melt along the third gap 4082, the present embodiment preferably provides the third gap 4082 to mate with the scrim material 400, i.e., the thickness of the third gap 4082 is comparable to or slightly less than the thickness of the scrim, while the thicknesses of the first, second, fourth, and fifth gaps 4071, 4072, 4083, 4084 may be slightly greater than the thickness of the scrim to facilitate movement of the scrim.

In this embodiment, preferably, the front end of the lower mold core 4021 is inserted into the groove of the upper mold 408, so that the mesh fabric 400 is pulled by propping, and the formed mesh frame central mesh 1 is controlled to loose according to the requirement, and the upper mold core 4081 and the lower mold core 4021 are both installed and fixed in a detachable manner, so that the loose amount of the mesh can be changed by matching and adjusting the upper mold core 4081 and the lower mold core 4021, so as to meet different installation tightening degrees.

In this embodiment, the upper mold 408 is preferably mounted on an upper mold fixing plate 410, and a hot runner plate 409 and a gate assembly 411 are mounted on the upper mold fixing plate 410, the hot runner plate 409 being fixed between the upper mold 408 and the upper mold fixing plate 410, and the gate assembly 411 passing through the hot runner plate 409 and the upper mold 408 and communicating with the molding cavity through a plurality of feed gates provided on the upper mold 408. The hot runner plate 409 is heated by oil temperature or electricity so that the melt in the runner of the runner assembly can maintain good fluidity, ensuring injection molding quality.

In this embodiment, as shown in fig. 10 and 12, a thimble assembly 412 is further disposed between the upper mold 408 and the hot runner plate 409, where the thimble assembly 412 includes a thimble, a positioning plate and a push plate, and the push plate is driven by a thimble driving member to move so as to push the thimble to eject, so as to realize demolding of the injection molded mesh frame from the upper mold. The thimble driving piece is a cylinder, a motor or a hydraulic cylinder.

In this embodiment, as shown in fig. 8, the screen cloth feeding device 401 is preferably further included for feeding the screen cloth fabric 100, where the screen cloth feeding device 401 includes a discharging device and a receiving device, and the discharging device and the receiving device are respectively fixed on the top and the bottom of the lower mold 402 in a top-to-bottom manner, and in other embodiments, may be respectively fixed on the top and the bottom of the first mold 403 or the second mold 407 in a top-to-bottom manner; the discharging device and the receiving device adopt an automatic coiling mode to transfer the mesh fabric 100 so as to realize automatic feeding during continuous injection molding.

In this embodiment, preferably, the lower mold 402 is provided with the guide post 404, the first mold frame 403 is installed on the lower mold 402 and moves along the guide post, the spring 405 is installed between the first mold frame 403 and the lower mold 402, when the mold is closed, the first mold frame 403 is pushed to the periphery of the lower mold 402 by the second mold frame 407, and when the mold is opened, the first mold frame 403 resets under the action of the spring 405, so that the edge waste material after the mesh fabric 400 is cut is pushed out of the lower mold 402, so that the mesh fabric 400 can move.

In this embodiment, the second mold 407 is preferably mounted on the upper mold 408 and is driven by the driving member 406 to move relative to the upper mold 408 to open and close the mold. In other embodiments, the second mold 407 may also be mounted on the guide post 404 of the lower mold 402, and its driving member is mounted between the second mold 407 and the first mold 403 or the lower mold 402.

In this embodiment, as shown in fig. 14 and 15, the cavity of the lower mold 402 is disposed around the lower mold core 4021, and includes, from outside to inside, a first annular groove 4022, a first annular protrusion 4023, and a second annular groove 4024, where the first annular groove 4022 cooperates with the second mold 407 to form a clamping gap 4074 for clamping the free edge portion of the mesh fabric 1, the first annular protrusion 4023 is used to form a part of the groove 204 of the annular bracket 2, and the second annular groove 4024 is used to form the protruding portion 203 of the annular bracket 2.

In this embodiment, as shown in fig. 16 and 17, the first mold 403 and the second mold 407 are preferably positioned by a concave-convex structure.

In this embodiment, as shown in fig. 18 and 19, the cavity of the second mold 407 includes a third annular groove 4076 and a second annular protrusion 4077, where the third annular groove 4076 cooperates with the upper mold 408 to form the outer wrapping portion 201 of the annular bracket 2, and the second annular protrusion 4077 is used to form another portion of the groove 204 of the annular bracket 2.

In this embodiment, as shown in fig. 20, the cavity of the upper mold 408 includes a third annular protrusion 4085 and a fourth annular groove 4086, the third annular protrusion 4085 cooperates with the lower mold 402 to form the insert portion 202 of the annular bracket 2, and the fourth annular groove 4086 cooperates with the third annular groove 4076 of the second mold 407 to form the outer wrapping portion 201 of the annular bracket 2.

The utility model also discloses a manufacturing method of the mesh frame, which adopts the die and comprises the following steps:

1) The first mold frame 403 and the second mold frame 407 are opened, and the mesh fabric 400 is put in;

2) Closing the mold and injection molding the mesh frame;

3) Opening between the second mold 407 and the upper mold 408, and taking out the mesh fabric frame; returning to the step 1) to continue injection molding.

In the description of the present specification, the descriptions of the terms "one embodiment," "some embodiments," "one implementation," "a particular implementation," "other implementations," "examples," "particular examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment, implementation, or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described above may be combined in any suitable manner in any one or more embodiments, implementations, or examples. The technical scheme disclosed by the utility model also comprises the technical scheme that any one or more specific features, structures, materials or characteristics are formed singly or in combination.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, variations, deletions of parts, additions of features, or re-combination of features may be made to the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model, all such simple modifications, equivalents, and adaptations of the embodiments as may be made by the principles of the utility model and without departing from the scope of the utility model.

Claims (10)

1. The manufacturing die for the mesh fabric frame is characterized by comprising an upper die (408), a first die frame (403), a second die frame (407) and a lower die (402) which are sequentially arranged, wherein an upper die core (4081) is fixed at the center of the upper die (408), and a lower die core (4021) is fixed at the center of the lower die (402); the first die frame (403) is arranged between the lower die (402) and the second die frame (407), the die opening moves relative to the lower die (402), and the die closing is sleeved outside the lower die core (4021); the second die frame (407) is arranged between the first die frame (403) and the upper die (408), the die opening moves relative to the lower die (402), and the die closing is sleeved outside the lower die core (4021); the lower die (402), the second die frame (407) and the upper die (408) are matched in a die mode to form a forming cavity for injection molding of the annular support (2), the first die frame (403) and the second die frame (407) are matched in a die mode to form a first gap (4071) for accommodating the mesh fabric (400), the second die frame (407) and the lower die (402) are matched in a die mode to form a second gap (4072) for accommodating the mesh fabric (400) and a cutting face (4073) for cutting off the mesh fabric (400), and the lower die (402) and the upper die (408) are matched in a die mode to form a mesh gap for accommodating the mesh fabric (1).

2. A mould for manufacturing a mesh fabric frame according to claim 1, characterized in that the second mould frame (407) and the lower mould (402) are in a clamped fit to form a clamping gap (4074) for clamping the free edge portion of the mesh fabric (1), the clamping gap (4074) being located between the cutting surface (4073) and the forming cavity.

3. A manufacturing die for a mesh frame according to claim 1, wherein the mesh gap includes: a third gap (4082) formed by die locking and matching of the lower die (402) and the upper die (408) and used for accommodating the edge of the mesh cloth (1), a fourth gap (4083) formed by die locking and matching of the lower die core (4021) and the upper die (408) and used for accommodating the mesh cloth (1), and a fifth gap (4084) formed by die locking and matching of the lower die core (4021) and the upper die core (4081) and used for accommodating the mesh cloth (1).

4. A die for manufacturing a mesh frame according to claim 3, wherein a release surface (4075) is provided between the second die frame (407) and the upper die (408); the third gap (4082) is tightly matched with the mesh fabric (400); the front end of the lower mold core (4021) is inserted into the groove of the upper mold (408) so as to push and pull the mesh fabric (400) to control the loosening degree of the mesh (1) of the formed mesh frame.

5. A manufacturing die for a mesh frame according to claim 1, wherein the upper die (408) is mounted on an upper die fixing plate (410), a hot runner plate (409) and a gate assembly (411) are mounted on the upper die fixing plate (410), the hot runner plate (409) is fixed between the upper die (408) and the upper die fixing plate (410), the gate assembly (411) is communicated with the molding cavity through the hot runner plate (409) and the upper die (408) and through a plurality of feed gates provided on the upper die (408), and the hot runner plate (409) is heated by oil temperature or electric heating; and a thimble assembly (412) is further arranged between the upper die (408) and the hot runner plate (409), the thimble assembly (412) comprises a thimble, a positioning plate and a push plate, and the push plate is driven to move by a thimble driving piece so as to push the thimble to eject, so that the screen cloth frame formed by injection molding is demoulded from the upper die (408).

6. A manufacturing die for a mesh frame according to claim 1, further comprising a mesh feeding device (401) for feeding the mesh fabric (400), wherein the mesh feeding device (401) is mounted on the lower die (402), the first die (403) or the second die (407).

7. A manufacturing mould for a mesh cloth frame according to claim 1, characterized in that the lower mould (402) cavity is arranged around the lower mould core (4021) and sequentially comprises a first annular groove (4022), a first annular protrusion (4023) and a second annular groove (4024) from outside to inside, the first annular groove (4022) and the second mould frame (407) are matched to form a clamping gap (4074) for clamping the free part of the edge of the mesh cloth (1), the first annular protrusion (4023) is used for forming a part of a groove (204) of the annular support (2), and the second annular groove (4024) is used for forming a clamping convex part (203) of the annular support (2); the second mould frame (407) cavity comprises a third annular groove (4076) and a second annular bulge (4077), the third annular groove (4076) is matched with the upper mould (408) to form the outer wrapping part (201) of the annular support (2), and the second annular bulge (4077) is used for forming the other part of the groove (204) of the annular support (2).

8. A manufacturing mould for a mesh frame according to claim 1, characterized in that the upper mould (408) cavity comprises a third annular protrusion (4085) and a fourth annular groove (4086), the third annular protrusion (4085) being adapted to cooperate with the lower mould (402) for forming the insert (202) of the annular support (2), the fourth annular groove (4086) being adapted to cooperate with the third annular groove (4076) of the second mould (407) for forming the outer envelope (201) of the annular support (2).

9. A mesh frame for chairs, produced from a manufacturing mould for a mesh frame according to any one of claims 1 to 8.

10. A chair comprising a mesh frame for a chair according to claim 9.