Thin-walled part stamping die and working method thereof

Abstract

This invention belongs to the field of injection mold technology, specifically relating to a mold for injection molding thin-walled parts, and more particularly to a stamping mold for thin-walled parts and its working method. The stamping mold for thin-walled parts includes: an upper mold and a lower mold; the upper mold has an injection pipe; the injection pipe communicates with an injection cavity; a clamping member is embedded at the connection between the injection pipe and the injection cavity; the clamping member is pushed inward by an external injection pipe to reduce the volume at the connection between the injection pipe and the injection cavity. By setting a clamping member at the connection between the injection pipe and the injection cavity, and by pushing the clamping member inward by an external injection pipe after injection, the volume at the connection is reduced, avoiding the problem of thin-walled parts easily breaking due to fixed-diameter injection pipes. A larger diameter injection nozzle can be used during injection to ensure injection efficiency, and the shrinkage volume after injection reduces the cross-sectional area of ​​excess material, thereby reducing the difficulty of breakage and preventing the thin-walled part from fracture.

Description

Technical Field

[0001] This invention belongs to the field of injection mold technology, specifically relating to a mold for injection molding thin-walled parts, and more particularly to a stamping mold for thin-walled parts and its working method. Background Technology

[0002] In the field of thin-walled part injection molding technology, the design of the injection port of the mold directly affects production efficiency and product quality.

[0003] In related technologies, excess material often remains at the injection port of thin-walled parts. Subsequent processing usually requires manual breaking and sanding to ensure a smooth surface. However, setting the injection port diameter faces a dilemma: if the diameter is too large, although it can shorten the injection time, the cross-sectional area of ​​the excess material increases, making it difficult to break and easily causing local stress concentration and breakage in the thin-walled part during breaking; if the diameter is too small, although it can reduce the amount of residual material, it increases the injection resistance, significantly prolongs the injection time, reduces production efficiency, and may cause filling defects due to insufficient flowability.

[0004] Therefore, how to ensure injection molding efficiency while avoiding breakage of thin-walled parts when excess material breaks is a technical problem that urgently needs to be solved.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0006] This disclosure provides at least one thin-walled part stamping die and its working method.

[0007] In a first aspect, embodiments of this disclosure provide a thin-walled part stamping die, comprising:

[0008] Upper mold and lower mold;

[0009] The upper and lower molds are closed to form an injection cavity;

[0010] The upper mold is provided with injection pipes;

[0011] The injection molding pipeline is connected to the injection molding cavity;

[0012] A clamping component is embedded at the connection between the injection molding pipeline and the injection molding cavity;

[0013] After the injection molding of the injection cavity is completed, the clamping member is pushed inward by the external injection molding tube to reduce the volume of the connection between the injection molding pipeline and the injection cavity.

[0014] In one alternative embodiment, the clamping member includes:

[0015] Two opposing arc-shaped clamping plates;

[0016] The bottom of the injection molding pipeline is provided with an embedding groove;

[0017] The outer wall of the arc-shaped clamping plate is elastically connected to the side wall of the embedded groove through a first reset spring;

[0018] A drive rod abuts against the arc-shaped clamping plate and, under the pressure of the external injection tube, drives the two arc-shaped clamping plates to move toward each other, thereby reducing the volume at the connection between the injection tube and the injection cavity.

[0019] In one alternative embodiment, the outer side of the arc-shaped clamping plate extends into a horizontal abutment block toward the end of the drive rod;

[0020] The top surface of the horizontal abutment block is provided with an inclined surface;

[0021] The bottom surface of the drive rod is provided with an inclined surface that is adapted to the inclined surface;

[0022] Under the movement of the drive rod, the horizontal holding block is pushed to move toward the central axis of the injection molding pipeline.

[0023] In one optional embodiment, the groove of the embedding groove is further provided with an arc-shaped groove that communicates with the injection molding cavity;

[0024] The clamping component also includes an arc-shaped push block;

[0025] The arc-shaped push block is elastically slidably connected within the arc-shaped groove by a second reset spring;

[0026] The arc-shaped push block is located below the drive rod;

[0027] After the thin-walled part has solidified, the external injection tube pushes the drive rod past the horizontal abutment block of the arc-shaped clamping plate and continues to move, so as to drive the drive rod to push the arc-shaped push block to separate the thin-walled part from the upper mold.

[0028] In one optional implementation, the number of the arc-shaped push blocks is two;

[0029] The two arc-shaped push blocks are arranged opposite each other.

[0030] In one alternative embodiment, the inner wall shape of the arc-shaped clamping plate is adapted to the inner wall shape of the injection molding pipeline.

[0031] In one alternative implementation, the distance between the inner walls of the two arc-shaped clamping plates is R;

[0032] Furthermore, the inner diameter of the injection molding pipeline is r;

[0033] In the initial state, R=r. After the external injection tube pushes the clamping part to retract inward, R<r.

[0034] Secondly, this disclosure also provides a working method for using a thin-walled stamping die as described above, the working method comprising:

[0035] Close the upper mold and the lower mold together;

[0036] Insert the external injection tubing into the injection tubing;

[0037] The raw material is injected into the injection cavity through an external injection tube;

[0038] After the raw material is injected, the clamping component is pushed inward by the external injection tube to reduce the volume at the connection between the injection tube and the injection cavity.

[0039] In one alternative embodiment, the clamping member includes:

[0040] Two opposing arc-shaped clamping plates;

[0041] The bottom of the injection molding pipeline is provided with an embedding groove;

[0042] The outer wall of the arc-shaped clamping plate is elastically connected to the side wall of the embedded groove through a first reset spring;

[0043] A drive rod abuts against the arc-shaped clamping plate and, under the pressure of the external injection tube, drives the two arc-shaped clamping plates to move toward each other, thereby reducing the volume at the connection between the injection tube and the injection cavity.

[0044] In one alternative embodiment, the outer side of the arc-shaped clamping plate extends into a horizontal abutment block toward the end of the drive rod;

[0045] The top surface of the horizontal abutment block is provided with an inclined surface;

[0046] The bottom surface of the drive rod is provided with an inclined surface that is adapted to the inclined surface;

[0047] Under the movement of the drive rod, the horizontal abutment block is pushed to move toward the central axis of the injection molding pipeline;

[0048] The groove of the embedding groove is also provided with an arc-shaped groove that communicates with the injection molding cavity;

[0049] The clamping component also includes an arc-shaped push block;

[0050] The arc-shaped push block is elastically slidably connected within the arc-shaped groove by a second reset spring;

[0051] The arc-shaped push block is located below the drive rod;

[0052] After the raw material is injected, the clamping member is pushed inward by the external injection tube to reduce the volume at the connection between the injection tube and the injection cavity. The working method of the thin-walled part stamping die further includes:

[0053] After the thin-walled part has solidified, the external injection tube pushes the drive rod past the horizontal abutment block of the arc-shaped clamping plate and continues to move, so as to drive the drive rod to push the arc-shaped push block to separate the thin-walled part from the upper mold.

[0054] The beneficial effects of this invention are that the thin-walled part stamping die and its working method, by setting a clamping member at the connection between the injection pipe and the injection cavity, and by pushing the clamping member inward to shrink after injection through the external injection pipe, reduce the volume at the connection, thus avoiding the problem that thin-walled parts are prone to breakage due to fixed-diameter injection pipes. A larger diameter injection port can be used during injection to ensure injection efficiency, and the shrinkage volume after injection reduces the cross-sectional area of ​​excess material, thereby reducing the difficulty of breakage and preventing the thin-walled part from fracture.

[0055] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0056] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0057] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0058] Figure 1 A cross-sectional view of a thin-walled stamping die provided in an embodiment of this disclosure;

[0059] Figure 2 This is a cross-sectional view of a portion of the structure of a thin-walled stamping die provided in an embodiment of this disclosure;

[0060] Figure 3 A cross-sectional view from another perspective of a portion of the structure of a thin-walled stamping die provided in an embodiment of this disclosure;

[0061] Figure 4 This is a partial structural schematic diagram of the clamping member provided in an embodiment of the present disclosure;

[0062] Figure 5 A flowchart illustrating the working method of a thin-walled stamping die provided in this embodiment of the disclosure.

[0063] In the diagram: 100, upper mold; 200, lower mold; 300, injection cavity; 400, injection pipeline; 410, insert groove; 411, arc groove; 500, clamping component; 510, arc clamping plate; 511, horizontal abutment block; 520, first return spring; 530, drive rod; 540, arc push block. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0066] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0067] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0068] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0069] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0070] Research has found that excess material often remains at the injection gate of thin-walled parts. Subsequent processing usually requires manual breaking and sanding to ensure a smooth surface. However, setting the injection gate diameter presents a dilemma: if the diameter is too large, although it can shorten the injection time, the cross-sectional area of ​​the excess material increases, making it difficult to break and easily causing local stress concentration and fracture in the thin-walled part during breaking; if the diameter is too small, although it can reduce the amount of residual material, it increases injection resistance, significantly prolongs the injection time, reduces production efficiency, and may cause filling defects due to insufficient flowability.

[0071] Based on the above research, this disclosure provides a thin-walled part stamping die and its working method. By setting a clamping member 500 at the connection between the injection pipe 400 and the injection cavity 300, and pushing the clamping member 500 inwards after injection molding via an external injection pipe, the volume at the connection is reduced, avoiding the problem of thin-walled parts easily breaking due to a fixed-diameter injection pipe 400. A larger diameter injection port can be used during injection molding to ensure injection efficiency, and the shrinkage volume after injection molding reduces the cross-sectional area of ​​excess material, thereby reducing the difficulty of breakage and preventing the thin-walled part from fracture.

[0072] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0073] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0074] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0075] Please see Figure 1 and Figure 2 At least one embodiment provides a thin-walled part stamping die, including: an upper die 100 and a lower die 200; the upper die 100 and the lower die 200 form an injection cavity 300 after being closed; the upper die 100 is provided with an injection pipe 400; the injection pipe 400 is connected to the injection cavity 300; wherein, a clamping member 500 is embedded at the connection between the injection pipe 400 and the injection cavity 300; after the injection cavity 300 is completed, the clamping member 500 is pushed inward by an external injection pipe to reduce the volume at the connection between the injection pipe 400 and the injection cavity 300.

[0076] By installing a clamping member 500 at the connection between the injection molding pipeline 400 and the injection molding cavity 300, and by pushing the clamping member 500 inward through the external injection molding tube after injection molding, the volume at the connection is reduced, thus avoiding the problem of thin-walled parts easily breaking due to the fixed diameter injection molding pipeline 400. A larger diameter injection port can be used during injection molding to ensure injection efficiency, and the shrinkage volume after injection molding reduces the cross-sectional area of ​​excess material, thereby reducing the difficulty of breakage and preventing the thin-walled parts from breaking.

[0077] Please see Figure 2 The clamping member 500 includes: two opposing arc-shaped clamping plates 510; an embedding groove 410 is provided at the bottom of the injection molding pipeline 400; the outer wall of the arc-shaped clamping plate 510 is elastically connected to the side wall of the embedding groove 410 through a first return spring 520; a driving rod 530, which abuts against the arc-shaped clamping plate 510 and drives the two arc-shaped clamping plates 510 to move towards each other under the compression of the external injection molding tube, so as to reduce the volume at the connection between the injection molding pipeline 400 and the injection molding cavity 300.

[0078] After the raw material is injected, the external injection tube squeezes the drive rod 530 to make the two arc-shaped clamping plates 510 move towards each other, thereby reducing the volume at the connection point and facilitating subsequent bending. At the same time, after demolding, the arc-shaped clamping plates 510 are reset under the reset action of the first reset spring 520 for the next use.

[0079] Please see Figure 2 and Figure 3 The arc-shaped clamping plate 510 extends a horizontal abutment block 511 from its outer surface toward the end of the drive rod 530; the top surface of the horizontal abutment block 511 is provided with an inclined surface (e.g., Figure 5 As shown); the bottom surface of the drive rod 530 is provided with an inclined surface adapted to the inclined surface (e.g. Figure 5 (As shown); under the movement of the drive rod 530, the horizontal abutment block 511 is pushed to move toward the central axis of the injection molding pipeline 400.

[0080] The drive rod 530 and the horizontal abutment block 511 cooperate through the inclined surface to convert the axial thrust into the radial contraction force. Therefore, there is no need to set up an additional drive mechanism. It is only necessary to control the distance of the external injection tube inserted into the injection pipe 400 at different stages of injection molding to realize the drive of the arc clamping plate 510.

[0081] Please continue reading. Figure 2 and Figure 3 The groove of the embedded groove 410 is also provided with an arc-shaped groove 411 that communicates with the injection cavity 300; the clamping member 500 also includes an arc-shaped push block 540; the arc-shaped push block 540 is elastically slidably connected in the arc-shaped groove 411 by a second reset spring; the arc-shaped push block 540 is located below the drive rod 530; after the thin-walled part is cured, the external injection tube pushes the drive rod 530 past the horizontal abutment block 511 of the arc-shaped clamping plate 510 and continues to move, so as to drive the drive rod 530 to push the arc-shaped push block 540 to separate the thin-walled part from the upper mold 100.

[0082] After shrinking the volume, the drive rod 530 can continue to push the arc-shaped push block 540 to assist in the demolding of the thin-walled part, reducing the manual part removal process and avoiding damage to the thin-walled part during demolding.

[0083] It should be noted that, in order to ensure that the pushing force on the thin-walled part is uniform, in the preferred embodiment, there are two arc-shaped push blocks 540; the two arc-shaped push blocks 540 are arranged opposite each other. The symmetrically distributed arc-shaped push blocks 540 ensure that the demolding force is applied evenly to the thin-walled part, preventing local stress concentration from causing deformation or breakage.

[0084] Please see Figure 2 and Figure 3The inner wall shape of the arc-shaped clamping plate 510 is adapted to the inner wall shape of the injection molding pipeline 400. The inner wall of the clamping plate is flush with the inner wall of the pipeline, so it does not interfere with the melt flow in the initial state and reduces injection resistance.

[0085] It should be noted that the distance between the inner walls of the two arc-shaped clamping plates 510 is R; and the inner diameter of the injection molding pipe 400 is r; in the initial state, R=r, and after the external injection molding pipe pushes the clamping part 500 to retract inward, R<r.

[0086] Please see Figure 5 This disclosure also provides a working method for using the thin-walled part stamping die as described above. By setting a clamping member 500 at the connection between the injection pipe 400 and the injection cavity 300, and pushing the clamping member 500 inward to shrink after injection through the external injection pipe, the volume at the connection is reduced, avoiding the problem that the fixed-diameter injection pipe 400 is prone to causing the thin-walled part to break. A larger diameter injection port can be used during injection to ensure injection efficiency, and the shrinkage volume after injection can reduce the cross-sectional area of ​​excess material, thereby reducing the difficulty of breakage and preventing the thin-walled part from breaking.

[0087] Specifically, the working method includes:

[0088] S110: Close the upper mold 100 and the lower mold 200;

[0089] S120: Insert the external injection tubing into the injection tubing 400;

[0090] S130: The raw material is injected into the injection cavity 300 through the external injection tube;

[0091] S140: After the raw material is injected, the clamping member 500 is pushed inward by the external injection tube to reduce the volume at the connection between the injection tube 400 and the injection cavity 300.

[0092] After the raw material is injected, the clamping member 500 is pushed inward by the external injection tube to reduce the volume at the connection between the injection tube 400 and the injection cavity 300. The working method of the thin-walled part stamping die further includes:

[0093] After the thin-walled part has solidified, the external injection tube pushes the drive rod 530 past the horizontal abutment block 511 of the arc-shaped clamping plate 510 and continues to move, so as to drive the drive rod 530 to push the arc-shaped push block 540 to separate the thin-walled part from the upper mold 100.

[0094] In summary, the present invention provides a thin-walled part stamping die and its working method. The thin-walled part stamping die includes an upper die 100 and a lower die 200. After the upper die 100 and the lower die 200 are closed, an injection cavity 300 is formed. The upper die 100 is provided with an injection pipe 400. The injection pipe 400 is connected to the injection cavity 300. A clamping member 500 is embedded at the connection between the injection pipe 400 and the injection cavity 300. After the injection cavity 300 is filled with injection molding, the clamping member 500 is pushed inward by an external injection pipe to reduce the volume at the connection between the injection pipe 400 and the injection cavity 300. By installing a clamping member 500 at the connection between the injection molding pipeline 400 and the injection molding cavity 300, and by pushing the clamping member 500 inward through the external injection molding tube after injection molding, the volume at the connection is reduced, thus avoiding the problem of thin-walled parts easily breaking due to the fixed diameter injection molding pipeline 400. A larger diameter injection port can be used during injection molding to ensure injection efficiency, and the shrinkage volume after injection molding reduces the cross-sectional area of ​​excess material, thereby reducing the difficulty of breakage and preventing the thin-walled parts from breaking.

[0095] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0096] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0097] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0098] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0099] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A stamping die for thin-walled parts, characterized in that, include: Upper mold (100) and lower mold (200); The upper mold (100) and the lower mold (200) are closed to form an injection cavity (300); The upper mold (100) is provided with injection pipes (400); The injection molding pipeline (400) is connected to the injection molding cavity (300); A clamping member (500) is embedded at the connection between the injection molding pipeline (400) and the injection molding cavity (300). After the injection molding of the injection cavity (300) is completed, the clamping member (500) is pushed inward by the external injection molding tube to reduce the volume at the connection between the injection molding pipeline (400) and the injection cavity (300); The clamping member (500) includes: Two opposing arc-shaped clamping plates (510); The bottom of the injection molding pipeline (400) is provided with an embedding groove (410). The outer wall of the arc-shaped clamping plate (510) is elastically connected to the side wall of the embedding groove (410) through the first reset spring (520); The drive rod (530) abuts against the arc-shaped clamping plate (510) and, under the pressure of the external injection tube, drives the two arc-shaped clamping plates (510) to move toward each other to reduce the volume at the connection between the injection tube (400) and the injection cavity (300). A horizontal abutment block (511) extends from the outside of the arc-shaped clamping plate (510) toward the end of the drive rod (530). The top surface of the horizontal abutment block (511) is provided with an inclined surface; The bottom surface of the drive rod (530) is provided with an inclined surface that is adapted to the inclined surface; Under the movement of the drive rod (530), the horizontal abutment block (511) is pushed to move toward the central axis of the injection molding pipeline (400).

2. The thin-walled part stamping die as described in claim 1, characterized in that, The groove of the embedding groove (410) is also provided with an arc-shaped groove (411) that communicates with the injection cavity (300). The clamping member (500) also includes an arc-shaped pusher (540); The arc-shaped push block (540) is elastically slidably connected in the arc-shaped groove (411) by a second reset spring; The arc-shaped push block (540) is located below the drive rod (530); After the thin-walled part is cured, the external injection tube pushes the drive rod (530) past the horizontal abutment block (511) of the arc-shaped clamping plate (510) and continues to move, so as to drive the drive rod (530) to push the arc-shaped push block (540) to separate the thin-walled part from the upper mold (100).

3. The thin-walled part stamping die as described in claim 2, characterized in that, The number of the arc-shaped push blocks (540) is two; The two arc-shaped push blocks (540) are arranged opposite each other.

4. The thin-walled part stamping die as described in claim 1, characterized in that, The inner wall shape of the arc-shaped clamping plate (510) is adapted to the inner wall shape of the injection molding pipeline (400).

5. The thin-walled part stamping die as described in claim 4, characterized in that, The distance between the inner walls of the two arc-shaped clamping plates (510) is R; Furthermore, the inner diameter of the injection molding pipe (400) is r; In the initial state, R=r. After the external injection tube pushes the clamp (500) to contract inward, R<r.

6. A working method using a thin-walled stamping die as described in claim 1, characterized in that, The working method includes: The upper mold (100) and the lower mold (200) are joined together; Insert the external injection tube into the injection tubing (400); The raw material is injected into the injection cavity (300) through an external injection tube; After the raw material is injected, the clamp (500) is pushed inward by the external injection tube to reduce the volume at the connection between the injection tube (400) and the injection cavity (300).

7. The working method of the thin-walled part stamping die as described in claim 6, characterized in that, The clamping member (500) includes: Two opposing arc-shaped clamping plates (510); The bottom of the injection molding pipeline (400) is provided with an embedding groove (410). The outer wall of the arc-shaped clamping plate (510) is elastically connected to the side wall of the embedding groove (410) through the first reset spring (520); The drive rod (530) abuts against the arc-shaped clamping plate (510) and, under the pressure of the external injection tube, drives the two arc-shaped clamping plates (510) to move toward each other, so as to reduce the volume at the connection between the injection tube (400) and the injection cavity (300).

8. The working method of the thin-walled part stamping die as described in claim 7, characterized in that, A horizontal abutment block (511) extends from the outside of the arc-shaped clamping plate (510) toward the end of the drive rod (530). The top surface of the horizontal abutment block (511) is provided with an inclined surface; The bottom surface of the drive rod (530) is provided with an inclined surface that is adapted to the inclined surface; Under the movement of the drive rod (530), the horizontal abutment block (511) is pushed to move toward the central axis of the injection molding pipeline (400); The groove of the embedding groove (410) is also provided with an arc-shaped groove (411) that communicates with the injection cavity (300). The clamping member (500) also includes an arc-shaped pusher (540); The arc-shaped push block (540) is elastically slidably connected in the arc-shaped groove (411) by a second reset spring; The arc-shaped push block (540) is located below the drive rod (530); After the raw material is injected, the clamping member (500) is pushed inward by the external injection tube to reduce the volume at the connection between the injection pipe (400) and the injection cavity (300). The working method of the thin-walled part stamping die further includes: After the thin-walled part is cured, the external injection tube pushes the drive rod (530) past the horizontal abutment block (511) of the arc-shaped clamping plate (510) and continues to move, so as to drive the drive rod (530) to push the arc-shaped push block (540) to separate the thin-walled part from the upper mold (100).

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