Floating injection mold and method of processing

Abstract

This application provides a floating injection mold and its processing method. The floating injection mold includes a male mold, a male mold insert, a female mold, a tapered pin, and an elastic locking mechanism. The joint surface between the female mold and the male mold insert is a parting surface located at the maximum outline of the plastic part. The mold cavity of the female mold and the mold cavity of the male mold insert form the outer surface of the plastic part, while the inner surface of the plastic part is formed by the male mold core of the male mold. The male mold insert surrounds the male mold core and is positioned on the female mold by the tapered pin. The male mold insert is floatingly connected to the male mold by the elastic locking mechanism. In a first direction, there is a first offset gap between the male mold insert and the male mold, and a second offset gap between the male mold insert and the elastic locking mechanism. The male mold insert is positioned by the female mold, avoiding positional deviations between the male mold insert and the female mold caused by the positional accuracy of the male mold and the female mold in the first direction. This reduces the number of adjustments and mold repairs, and improves the development efficiency of the injection mold.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to a floating injection mold and its processing method. Background Technology

[0002] Currently, plastic parts used in mobile phones or headphones include those with a high-gloss curved surface and a maximum outline located in the center of the surface. To reduce the parting line and its location in the mold for this type of part, the mold is typically split at the maximum outline during mold processing.

[0003] However, by splitting the mold at the maximum contour line, the resulting mold parts are misaligned due to the combined effects of their individual machining accuracy and the assembly position accuracy of their respective templates. This misalignment manifests as step differences in the molded plastic parts, affecting their appearance. To achieve the best appearance for the plastic parts, the split mold requires multiple trial moldings and modifications during processing, thus impacting the development efficiency of injection molds.

[0004] Therefore, how to improve the development efficiency of injection molds has become a technical problem that urgently needs to be solved by those skilled in the art.

[0005] Application content

[0006] This application provides a floating injection mold and a processing method to improve the development efficiency of injection molds.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] In a first aspect, this application provides a floating injection mold, including a male mold, a male mold insert, a female mold, a tapered pin, and an elastic locking mechanism. The mating surface between the female mold and the male mold insert is a parting surface located at the maximum outline of the plastic part. The mold cavity of the female mold and the mold cavity of the male mold insert form the outer surface of the plastic part, while the inner surface of the plastic part is formed by the male mold core of the male mold. The male mold insert surrounds the male mold core of the male mold and is positioned on the female mold by the tapered pin. The male mold insert is floatingly connected to the male mold by the elastic locking mechanism. In a first direction, there is a first offset gap between the male mold insert and the male mold, and a second offset gap between the male mold insert and the elastic locking mechanism. When an external force is applied to the male mold insert, the male mold insert can overcome the force exerted by the elastic locking mechanism and the male mold and move in the first direction.

[0009] As can be seen, in the floating injection mold described in this embodiment, the male mold insert is positioned by the female mold, avoiding positional deviations between the male mold insert and the female mold caused by the positional accuracy of the male mold and the female mold in the first direction. This reduces the number of adjustments and mold repairs, thereby improving the development efficiency of the injection mold. Furthermore, during mass production, even if wear occurs in the positioning components that position the male and female molds, since the male mold insert is directly positioned by the female mold via tapered pins, the misalignment between the male mold insert and the female mold is minimal. This results in minimal changes in the step height of the plastic parts, thereby improving the production efficiency of the plastic parts.

[0010] In one possible implementation, the male mold core and the male mold are either separate structures or an integrated structure.

[0011] In one possible implementation, a portion of the tapered pin is fixed to the male mold insert, and another portion of the tapered pin engages with a first tapered positioning groove to position the tapered pin on the female mold.

[0012] In one possible implementation, the male mold insert is provided with a second tapered positioning groove, and a tapered pin is welded to the second tapered positioning groove.

[0013] In one possible implementation, the number of tapered pins is three.

[0014] In one possible implementation, the resilient locking mechanism includes a fastener and a resilient washer, and the male mold insert has a mounting hole; the male mold has a threaded hole at a position corresponding to the mounting hole; in a first direction, there is a second offset gap between the portion of the fastener located in the mounting hole and the mounting hole; the resilient washer is located between the fastener and the male mold insert to provide preload for the fastener; the fastener passes through the resilient washer and the mounting hole in sequence and is locked in the threaded hole, so that the male mold insert is floatingly connected to the male mold.

[0015] In one possible implementation, the resilient locking mechanism further includes a bushing fitted onto the fastener, wherein in a first direction, the portion of the fastener located in the mounting hole has a second offset gap between the bushing and the mounting hole.

[0016] In one possible implementation, the elastic washer is a spring or a plastic elastomer.

[0017] In one possible implementation, a clearance hole is provided at the position opposite to the elastic locking mechanism of the female mold, and the clearance hole accommodates the portion of the elastic locking mechanism located outside the male mold insert.

[0018] In one possible implementation, in the second direction, the male mold insert has a third offset gap with the male mold, and the mounting hole and the elastic locking mechanism have a fourth offset gap, and the second direction is perpendicular to the first direction.

[0019] In one possible implementation, the fourth offset gap, the third offset gap, the second offset gap, and the first offset gap are of the same size.

[0020] Secondly, this application provides a method for processing a floating injection mold. The floating injection mold includes a male mold, a male mold insert, a female mold, a tapered pin, and an elastic locking mechanism. The mating surface between the female mold and the male mold insert is a parting surface located at the maximum outline of the plastic part. The mold cavity of the female mold and the mold cavity of the male mold insert form the outer surface of the plastic part, while the inner surface of the plastic part is formed by the male mold core of the male mold. The male mold insert surrounds the male mold core and is positioned on the female mold by the tapered pin. The male mold insert is floatingly connected to the male mold by the elastic locking mechanism. In a first direction, there is a first offset gap between the male mold insert and the male mold, and a second offset gap between the male mold insert and the elastic locking mechanism. When an external force is applied to the male mold insert, the male mold insert can overcome the force exerted by the elastic locking mechanism and the male mold and move in the first direction. The method for processing the floating injection mold includes the following steps:

[0021] The male mold insert and the female mold are locked together by auxiliary screws. The first tapered positioning groove and the second tapered positioning groove are machined, and the mold cavity position is rough machined at the same time.

[0022] After machining, assemble the tapered pins, and then fix the tapered pins and the male mold insert together;

[0023] Remove the auxiliary screws and assemble the polishing fixture. Lock the male mold insert, polishing fixture, and female mold together with the auxiliary screws and then finish the mold cavity until polished.

[0024] After all parts processing is completed, remove the auxiliary screws and take out the male mold insert and female mold.

[0025] Mold assembly and trial molding.

[0026] Secondly, this application provides a floating injection mold, including a male mold, a male mold insert, a female mold, a tapered pin, an elastic locking mechanism, and a female mold insert. The mating surface between the female mold insert and the male mold insert is at the parting surface, which is located at the maximum outline of the plastic part. The mold cavities of the female mold insert and the male mold insert form the outer surface of the plastic part, while the inner surface of the plastic part is formed by the male mold core of the male mold. The male mold insert surrounds the male mold core and is fixed to the male mold by a first fastener. The female mold insert is positioned on the male mold insert by a tapered pin. The female mold insert is floatingly connected to the female mold by the elastic locking mechanism. In a first direction, there is a first offset gap between the female mold insert and the female mold, and a second offset gap between the female mold insert and the elastic locking mechanism. When an external force is applied to the female mold insert, the female mold insert can overcome the force exerted by the elastic locking mechanism and the female mold and move in the first direction.

[0027] In one possible implementation, the male mold core and the male mold are either separate structures or an integrated structure.

[0028] In one possible implementation, a portion of the tapered pin is fixed to the male mold insert, and another portion of the tapered pin engages with a first tapered positioning groove to fix the tapered pin to the female mold insert.

[0029] In one possible implementation, the male mold insert is provided with a second tapered positioning groove, and a tapered pin is welded to the second tapered positioning groove.

[0030] In one possible implementation, the number of tapered pins is three.

[0031] In one possible implementation, the resilient locking mechanism includes a second fastener and a resilient washer, and the female mold insert has a mounting hole; the female mold has a threaded hole at a position corresponding to the mounting hole; in a first direction, there is a second offset gap between the second fastener and the mounting hole on both sides of the portion of the second fastener located in the mounting hole; the resilient washer is located between the second fastener and the female mold insert to provide preload for the second fastener; the second fastener passes through the resilient washer and the mounting hole in sequence and is locked in the threaded hole, so that the female mold insert is floatingly connected to the female mold.

[0032] In one possible implementation, the resilient locking mechanism further includes a bushing fitted onto the second fastener, wherein, in a first direction, the portion of the second fastener located in the mounting hole has a second offset gap between the bushing and the mounting hole.

[0033] In one possible implementation, the elastic washer is a spring or a plastic elastomer.

[0034] In one possible implementation, in the second direction, there is a third offset gap between the female mold insert and the female mold, and a fourth offset gap between the mounting hole and the elastic locking mechanism, and the second direction is perpendicular to the first direction.

[0035] In one possible implementation, the fourth offset gap, the third offset gap, the second offset gap, and the first offset gap are of the same size.

[0036] Thirdly, this application provides a method for processing a floating injection mold. The floating injection mold includes a male mold, a male mold insert, a female mold, a tapered pin, an elastic locking mechanism, and a female mold insert. The mating surface between the female mold insert and the male mold insert is at the parting surface, which is located at the maximum outline of the plastic part. The mold cavity of the female mold insert and the mold cavity of the male mold insert form the outer surface of the plastic part, and the inner surface of the plastic part is formed by the male mold core of the male mold. The male mold insert surrounds the male mold core of the male mold. The female mold insert is fixed to the male mold by a first fastener, and the female mold insert is positioned on the male mold insert by a tapered pin; the female mold insert is floatingly connected to the female mold by an elastic locking mechanism; in a first direction, there is a first offset gap between the female mold insert and the female mold, and a second offset gap between the female mold insert and the elastic locking mechanism; when an external force is applied to the female mold insert, the female mold insert can overcome the force between the elastic locking mechanism and the female mold and move in the first direction; the processing method of the floating injection mold includes the following steps:

[0037] The male mold insert and the female mold insert are fastened together by auxiliary screws. The first tapered positioning groove and the second tapered positioning groove are machined, and the mold cavity position is rough machined at the same time.

[0038] After machining, assemble the tapered pins, and then fix the tapered pins and the male mold insert together;

[0039] Remove the auxiliary screws and assemble the polishing fixture. Lock the male mold insert, polishing fixture, and female mold insert together with the auxiliary screws and then finish the mold cavity until polished.

[0040] After all parts processing is completed, remove the auxiliary screws and take out the male mold insert and female mold insert;

[0041] Mold assembly and trial molding. Attached Figure Description

[0042] Figure 1 A perspective view of the plastic part provided in this application;

[0043] Figure 2 The maximum outline of the plastic part provided in this application;

[0044] Figure 3 A perspective view of an injection mold provided in this application;

[0045] Figure 4 for Figure 3 A schematic diagram of the injection mold shown;

[0046] Figure 5 For the reason Figure 3 The image shown is a three-dimensional view of the plastic part after it has been molded by the injection mold.

[0047] Figure 6 A perspective view of another injection mold provided in this application;

[0048] Figure 7 for Figure 6 A schematic diagram of the injection mold shown;

[0049] Figure 8 For the reason Figure 6 The image shown is a three-dimensional view of the plastic part after it has been molded by the injection mold.

[0050] Figure 9 A perspective view of the floating injection mold provided in Embodiment 1 of this application;

[0051] Figure 10 A schematic diagram of the floating injection mold provided in Embodiment 1 of this application;

[0052] Figure 11 for Figure 10 Enlarged view of section A;

[0053] Figure 12 for Figure 10 Enlarged view of section B;

[0054] Figure 13 for Figure 9 Enlarged view of section C;

[0055] Figure 14 A top view of the floating injection mold provided in the embodiments of this application;

[0056] Figure 15 for Figure 14 Sectional view of section DD;

[0057] Figure 16 for Figure 15 Enlarged view of section E in the middle;

[0058] Figure 17 A perspective view of machining the first tapered positioning groove and the second tapered positioning groove provided for embodiments of this application;

[0059] Figure 18 A perspective view of the installation of the tapered pin provided in an embodiment of this application;

[0060] Figure 19 A perspective view of the female mold, male mold insert, and polishing fixture before assembly, as provided in the embodiments of this application;

[0061] Figure 20 A perspective view of the assembled female mold, male mold insert, and polishing fixture provided in an embodiment of this application;

[0062] Figure 21 This application provides a schematic diagram of the floating injection mold processing flow;

[0063] Figure 22 This is a perspective view of the female mold and female mold insert in the floating injection mold provided in Embodiment 2 of this application;

[0064] Figure 23 This is a top view of the floating injection mold provided in Embodiment 2 of this application;

[0065] Figure 24 for Figure 23 A sectional view of section GG;

[0066] Figure 25 This is a schematic diagram of the floating injection mold provided in Embodiment 2 of this application;

[0067] Figure 26 for Figure 25 Enlarged view of section H in the middle;

[0068] Figure 27 for Figure 25 Enlarged view of section I;

[0069] Figure 28 A perspective view of machining the first tapered positioning groove and the second tapered positioning groove provided for embodiments of this application;

[0070] Figure 29 A perspective view of the installation of the tapered pin provided in an embodiment of this application;

[0071] Figure 30 A perspective view of the female mold insert, male mold insert, and polishing fixture before assembly, as provided in the embodiments of this application;

[0072] Figure 31 A perspective view of the assembled female mold insert, male mold insert, and polishing fixture provided in the embodiments of this application;

[0073] Figure 32 This application provides a schematic diagram of the floating injection mold processing flow.

[0074] Figures 1 to 8 In the diagram, 10 represents a plastic part; 10a and 10b represent plastic parts; 10-1a represents the first step difference; 10-2a represents the second step difference; and 10-1b represents the step difference. 1 represents an injection mold; 11 represents a male mold; 12 represents a female mold; 13 represents the first slider; and 14 represents the second slider. 2 represents an injection mold; 21 represents the male mold; 22 represents the female mold; and 23 represents the male mold insert.

[0075] Figures 9 to 20In the diagram, 3a is a floating injection mold, 31a is a male mold, 32a is a male mold insert, 33a is a female mold, 34a is a tapered pin, 35a is an elastic locking mechanism, 311a is a male mold core, 312a is a mounting groove, 313a is a threaded hole, 321a is a mold cavity, 323a is a mounting hole, 322a is a second tapered positioning groove, 331a is a mold cavity, 332a is a first tapered positioning groove, 333a is a clearance hole, 351a is a fastener, 352a is a bushing, and 353a is an elastic washer.

[0076] Figures 22 to 31 In the diagram, 3b is a floating injection mold, 31b is a male mold, 32b is a male mold insert, 33b is a female mold, 34b is a tapered pin, 35b is an elastic locking mechanism, 36b is a female mold insert, 37b is a first fastener, 311b is a male mold core, 312b is a mounting groove, 321b is a mold cavity, 322b is a second tapered positioning groove, 332b is a first tapered positioning groove, 334b ​​is a screw hole, 335b is a mounting groove, 351b is a second fastener, 352b is a bushing, 353b is an elastic washer, 361b is a mold cavity, 362b is a first tapered positioning groove, and 363b is a mounting hole. Detailed Implementation

[0077] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0078] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0079] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0080] Before introducing the embodiments of this application, some terms or concepts involved in the embodiments of this application will be explained first. It should be understood that this application does not specifically limit the naming of the following terms. The following terms may have other names, and the renamed terms will still satisfy the following related terminology interpretations.

[0081] Inserts are irregular mold accessories used to be embedded in molds, serving to fix the template and fill the space between the templates.

[0082] See Figure 1 and Figure 2 , Figure 1 A perspective view of the plastic part provided in this application. Figure 2 This application provides the maximum outline of the plastic part. The plastic part 10 provided in this application has a high-gloss curved surface, and its maximum outline is located in the center of the surface. This plastic part can be used in mobile phones or headphones, such as headphone housings or mobile phone housings. Currently, the injection molds used for injection molding the above-mentioned plastic parts can be divided into the following two types:

[0083] See Figures 3 to 5 , Figure 3 and Figure 4 An injection mold is shown. Figure 5 For the reason Figure 3The diagram shows a perspective view of the plastic part formed by the injection mold. The injection mold 1 includes a male mold 11, a female mold 12, a first slider 13, and a second slider 14. The male mold 11 is located between the first slider 13 and the second slider 14, and the female mold 12 is located above the male mold 11, the first slider 13, and the second slider 14. The first slider 13 and the second slider 14 are joined with the female mold 12 to form a first parting surface, and the first slider 13 and the second slider 14 are joined to form a second parting surface. The first parting surface is located at the maximum outline of the plastic part 10a or offset upward by a predetermined distance. The female mold 12 forms the upper part of the outer surface of the plastic part 10a, and the first slider 13 and the second slider 14 form the lower part of the outer surface of the plastic part 10a.

[0084] In the aforementioned injection mold 1, the misalignment of the first slider 13 and the second slider 14 with the female mold 12 is reflected in the plastic part 10a as a first step difference 10-1a, and the misalignment of the first slider 13 and the second slider 14 is reflected in the plastic part 10a as a second step difference 10-2a. The size of the misalignment between the first slider 13 and the second slider 14 and the female mold 12, as well as the size of the misalignment between the first slider 13 and the second slider 14, and the female mold 12, is jointly affected by the processing accuracy of the first slider 13, the second slider 14, and the female mold 12, as well as the accuracy of their respective assembly positions on the template. This requires multiple trial moldings and mold repairs, which affects the development efficiency of the injection mold. In addition, during mass production, due to the wear of the first slider 13 and the second slider 14, the misalignment between the first slider 13 and the second slider 14 and the female mold 12 becomes larger and larger. As the misalignment between the first slider 13 and the second slider 14 becomes larger and larger, the first stage difference 10-1a and the second stage difference 10-2a of the plastic part 10a will become larger and larger during production, which will affect the yield and production efficiency of the plastic part 10a.

[0085] See Figures 6 to 8 , Figure 6 and Figure 7 Another injection mold is shown. Figure 8 For the reason Figure 6 The image shown is a perspective view of the plastic part formed by the injection mold. The injection mold includes a male mold 21, a male mold insert 23, and a female mold 22. The male mold insert 23 is located on the male mold 21, and the female mold 22 is located on the male mold insert 23. The female mold 22 and the male mold insert 23 are joined to form a parting surface, which is located at the maximum outline of the plastic part 10b. The female mold 22 forms the upper part of the outer surface of the plastic part 10b, and the male mold insert 23 forms the lower part of the outer surface of the plastic part 10b.

[0086] In the aforementioned injection mold, the misalignment between the male mold insert 23 and the female mold 22, after molding, is reflected in the plastic part 10b as a step difference of 10-1b. The magnitude of the misalignment between the male mold insert 23 and the female mold 22 is affected by both their individual machining accuracy and their respective assembly position accuracy on the template, requiring multiple trial moldings and repairs, thus impacting the development efficiency of the injection mold. Furthermore, due to wear on the positioning components of the male mold 21 and the female mold 22, the misalignment between the male mold insert 23 and the female mold 22 increases during mass production, resulting in an increasingly larger step difference of 10-1b in the plastic part 10b, affecting the yield and production efficiency of the plastic part 10b.

[0087] As can be seen from the above: Figure 3 and Figure 4 The injection mold shown, and Figure 6 and Figure 7 The injection molds shown require multiple mold repairs during processing, which affects the development efficiency of injection molds.

[0088] Based on the above problems, this application introduces several floating injection molds with different structures and processing methods through the following embodiments.

[0089] Example 1

[0090] See Figures 9 to 13 , Figure 9 A perspective view of a floating injection mold according to an embodiment of this application is shown; Figure 10 A schematic diagram of a floating injection mold according to an embodiment of this application is shown; Figure 11 for Figure 10 Enlarged view of section A; Figure 12 for Figure 10Enlarged view of part B. The floating injection mold 3a includes a male mold 31a, a male mold insert 32a, a female mold 33a, a tapered pin 34a, and an elastic locking mechanism 35a. The female mold 33a and the male mold insert 32a are joined to form a parting surface, located at the maximum outline of the plastic part. The cavity 331a of the female mold 33a forms the upper part of the plastic part's outer surface, while the lower part of the plastic part's outer surface is formed by the cavity 321a of the male mold insert 32a. The inner surface of the plastic part is formed by the male mold core 311a of the male mold 31a. The male mold insert 32a surrounds the male mold core of the male mold 31a. 311a, the male mold insert 32a is positioned on the female mold 33a by a tapered pin 34a, and the male mold insert 32a is floatingly connected to the male mold 31a by an elastic locking mechanism 35a. In the first direction ox, there is a first offset gap d1 between the male mold insert 32a and the male mold 31a, and a second offset gap d2 between the male mold insert 32a and the elastic locking mechanism 35a. When an external force is applied to the male mold insert 32a, the male mold insert 32a can overcome the force of the elastic locking mechanism 35a and the male mold 31a and move relative to the male mold 31a in the first direction ox.

[0091] As can be seen, in the floating injection mold 3a described in the embodiments of this application, the male mold insert 32a is positioned by the female mold 33a, which avoids the positional deviation between the male mold insert 32a and the female mold 33a caused by the positional accuracy of the male mold 31a in the first direction ox, reduces the number of times the mold needs to be adjusted and repaired, and thus improves the development efficiency of the floating injection mold.

[0092] In addition, during mass production, even if the positioning parts of the male mold 31a and female mold 33a are worn, since the male mold insert 32a is directly positioned by the female mold 33a, the misalignment between the male mold insert 32a and the female mold 33a is not significant. Therefore, the step difference of the plastic parts is not significantly affected, thereby improving the yield and production efficiency of the plastic parts.

[0093] It should be noted that, in the illustration, the male mold 31a is provided with a mounting groove 312a for mounting the male mold insert 32a, and the male mold insert 32a is floatingly connected to the mounting groove 312a through an elastic locking mechanism 35a. The first offset gap d1 between the male mold insert 32a and the male mold 31a in the first direction can be understood as the first offset gap d1 between the male mold insert 32a, the male mold core 311a, and the mounting groove 312a, so that the male mold insert can have an offset space in the first direction ox. In some embodiments of this application, the male mold insert 32a can also be floatingly connected to the male mold 31a through the elastic locking mechanism 35a, that is, the male mold insert 32a is disposed on the surface of the male mold 31a. In the first direction, the first offset gap d1 between the male mold insert 32a and the male mold 31a can be understood as the first offset gap d1 between the male mold insert 32a and the male mold core 311a of the male mold 31a, so that the male mold insert can have an offset space in the first direction ox.

[0094] Figure 10 The male mold core 311a and the male mold 31a shown are integral structures, both being machined from the same blank; in some instances, the male mold core 311a and the male mold 31a can also be separate structures, connected by screws or pins.

[0095] The tapered pin 34a enables the positioning connection between the male mold insert 32a and the female mold 33a. A portion of the tapered pin 34a is fixed to the male mold insert 32a, while the other portion engages with a first tapered positioning groove 332a on the female mold 33a, thus positioning the tapered pin 34a within the female mold 33a. The tapered pin 34a ensures that the male mold insert 32a is relatively fixed to the female mold 33a, and also allows for separation of the male mold insert 32a from the female mold 33a after injection molding, facilitating demolding. The tapered pin 34a is fixed to the male mold insert 32a by welding, or the male mold insert 32a is provided with a second tapered positioning groove 322a at a position opposite to the first tapered positioning groove 332a, a part of the tapered pin 34a is self-locked in the second tapered positioning groove 322a, and the other part of the tapered pin 34a is exposed in the male mold insert 32a to cooperate with the first tapered positioning groove 332a.

[0096] In some embodiments of this application, a portion of the tapered pin 34a may also be fixed to the female mold 33a, and the other portion of the tapered pin 34a may engage with a second tapered positioning groove 322a provided on the male mold insert 32a, so that the tapered pin 34a is positioned on the male mold insert 32a. The use of the tapered pin 34a ensures that the male mold insert 32a is relatively fixed to the female mold 33a, and also allows the male mold insert 32a to be separated from the female mold 33a after injection molding, facilitating demolding. The tapered pin 34a may be fixed to the female mold 33a by welding, or a first tapered positioning groove 332a may be provided on the female mold 33a at a position opposite to the second tapered positioning groove 322a, with a portion of the tapered pin 34a self-locking in the first tapered positioning groove 332a, and the other portion of the tapered pin 34a protruding from the female mold 33a to engage with the second tapered positioning groove 322a.

[0097] In this embodiment, the number of tapered pins 34a is three. In some embodiments, the number of tapered pins 34a may also be four, five, six, etc. In this embodiment, the number of elastic locking mechanisms 35a is four. In some embodiments, the number of elastic locking mechanisms 35a may also be five, six, etc.

[0098] See Figure 10 The male mold insert 32a is thinner than the female mold 33a. A clearance hole 333a is provided on the portion of the female mold 33a opposite to the elastic locking mechanism 35a. This clearance hole 333a accommodates the portion of the elastic locking mechanism 35a exposed in the male mold insert 32a. The number of clearance holes 333a is the same as the number of elastic locking mechanisms 35a. In some embodiments of this application, a countersunk hole may also be provided in the mounting hole 323a of the male mold insert 32a to accommodate the portion of the elastic locking mechanism 35a exposed in the male mold insert 32a.

[0099] Combination Figure 12 See Figure 13 , Figure 13A perspective view of the elastic locking mechanism 35a is shown. The elastic locking mechanism 35a includes a fastener 351a, a bushing 352a, and an elastic washer 353a. The male mold insert 32a has a mounting hole 323a. The male mold 31a has a threaded hole 313a at a position corresponding to the mounting hole 323a. A portion of the bushing 352a is located in the mounting hole 323a, and another portion of the bushing 352a protrudes from the male mold insert 32a. In the first direction ox, a second offset gap d2 exists between the bushing 352a located in the mounting hole 323a and the mounting hole 323a on both sides. The elastic washer 353a is located between the bushing 352a and the male mold insert 32a to provide preload for the fastener 351a. The fastener 351a passes sequentially through the bushing 352a, the elastic washer 353a, and the mounting hole 323a and is locked in the threaded hole 313a, allowing the male mold insert 32a to float and connect to the male mold 31a.

[0100] When the male mold insert 32a is installed on the male mold 31a, the mounting hole 323a of the male mold insert 32a is aligned with the threaded hole 313a of the male mold 31a. An elastic washer 353a and a bushing 352a are installed in the mounting hole 323a. The fastener 351a is then passed sequentially through the bushing 352a, the elastic washer 353a, and the mounting hole 323a. Rotating the fastener 351a locks it in the threaded hole 313a. Because the bushing 352a… An elastic washer 353a exists between the male mold insert 32a and the female mold insert 32a, providing preload to the fastener 351a to fix the male mold insert 32a onto the male mold 31a. When an external force in the first direction ox is applied to the male mold insert 32a, due to the second offset gap d2 between the bushing 352a and the mounting hole 323a, the male mold insert 32a can overcome the friction between the male mold 31a and the elastic washer 353a and offset in the first direction ox. Thus, it can be seen that the elastic locking mechanism 35a of this embodiment can ensure the fixed connection between the male mold insert 32a and the male mold 31a when not subjected to external force, and will produce a certain offset under the action of a certain external force in the first direction ox, thereby realizing the floating connection between the male mold insert 32a and the male mold 31a.

[0101] In this embodiment, the portion of the bushing 352a located in the mounting hole 323a is equal to the depth of the mounting hole 323a. In some embodiments, the portion of the bushing 352a located in the mounting hole 323a is less than the depth of the mounting hole 323a. In some embodiments, one end of the bushing 352a near the threaded hole 313a protrudes from the mounting hole 323a, and a countersunk hole may be provided at the corresponding portion of the male mold 31a to accommodate the portion of the bushing 352a protruding from the mounting hole 323a.

[0102] In this embodiment, the elastic washer 353a provides preload to the fastener 351a through elastic deformation. In some examples, the elastic washer 353a may be a spring. In some examples, the elastic washer 353a may also be a plastic elastomer, etc.

[0103] It should be noted that the elastic locking mechanism 35a shown in the embodiments of this application includes a fastener 351a, a bushing 352a, and an elastic washer 353a. In some embodiments, the elastic locking mechanism 35a may not include a bushing 352a, and may include a fastener 351a and an elastic washer 353a. In this embodiment, the male mold insert 32a is provided with a mounting hole 323a; the male mold 31a is provided with a threaded hole 313a at a position corresponding to the mounting hole 323a; in the first direction ox, there is a second offset gap d2 between the fastener 351a and the mounting hole 323a on both sides of the portion of the fastener 351a located in the mounting hole 323a; the elastic washer 353a is located between the fastener 351a and the male mold insert 32a to provide preload for the fastener 351a; the fastener 351a passes through the elastic washer 353a and the mounting hole 323a in sequence and is locked in the threaded hole 313a, so that the male mold insert 32a is floatingly connected to the male mold 31a.

[0104] When the male mold insert 32a is installed on the male mold 31a, the mounting hole 323a of the male mold insert 32a is aligned with the threaded hole 313a of the male mold 31a. An elastic washer 353a is installed at the mounting hole 323a. The fastener 351a is passed through the elastic washer 353a and the mounting hole 323a in sequence. The fastener 351a is rotated to lock it in the threaded hole 313a. Since there is an elastic washer 353a between the fastener 351a and the male mold insert 32a, a preload force can be provided to the fastener 351a to fix the male mold insert 32a on the male mold 31a. When an external force in the first direction ox is applied to the male mold insert 32a, since there is a second offset gap d2 between the fastener 351a and the mounting hole 323a, the male mold insert 32a can overcome the friction between the male mold insert, the elastic washer 353a and the male mold 31a and offset in the first direction ox. Therefore, it can be seen that the elastic locking mechanism 35a of this application embodiment can ensure the fixed connection between the male mold insert 32a and the male mold 31a when it is not subjected to external force, and will produce a certain offset under the action of a certain external force in the first direction ox, thereby realizing the floating connection between the male mold insert 32a and the male mold 31a.

[0105] It should be noted that in this embodiment, the second offset gap d2 is the same size as the first offset gap d1. In some embodiments, the second offset gap d2 is different in size from the first offset gap d1.

[0106] In the above embodiments of this application, the male mold insert 32a and the male mold 31a may have a first offset gap d1 between them in the first direction ox, so as to avoid positional deviation between the male mold insert 32a and the female mold 33a caused by the positional accuracy of the male mold 31a in the first direction ox. In some embodiments of this application, the male mold insert 32a and the male mold 31a may also have a third offset gap in the second direction oy, wherein the second direction oy is perpendicular to the first direction ox. This avoids positional deviation between the male mold insert 32a and the female mold 33a caused by the positional accuracy of the male mold 31a and the male mold 31a in the second direction oy.

[0107] See Figures 14 to 16 , Figure 14 A top view of the floating injection mold 3 is shown; Figure 15 Showing Figure 14 Sectional view of section DD; Figure 16 for Figure 15 Enlarged view of part E in this application. In some embodiments of this application, in the second direction oy, the elastic locking mechanism 35a and the mounting hole 323a have a fourth offset gap d4. In some examples of this application, the cross-section of the mounting hole 323a is circular, and the cross-section of the elastic locking mechanism 35a is circular, wherein the difference between the radius of the mounting hole 323a and the radius of the portion of the elastic locking mechanism 35a located in the mounting hole 323a is the fourth offset gap d4. The cross-section of the part where the mounting hole 323a and the elastic locking mechanism 35a mate is circular, which facilitates processing.

[0108] It should be noted that the fourth offset gap d4 may be the same size as or different from the third offset gap.

[0109] Combination Figures 9 to 12 See Figures 17 to 21 , Figures 17 to 20 A 3D view of the manufacturing process of the floating injection mold 3a is shown; Figure 21A schematic diagram of the processing flow of a floating injection mold 3a is shown. This application provides a processing method for a floating injection mold 3a, wherein the floating injection mold 3a includes a male mold 31a, a male mold insert 32a, a female mold 33a, a tapered pin 34a, and an elastic locking mechanism 35a. The female mold 33a and the male mold insert 32a are joined to form a parting surface, which is located at the maximum outline of the plastic part. The cavity 331a of the female mold 33a forms the upper part of the outer surface of the plastic part, and the lower part of the outer surface of the plastic part is formed by the cavity 321a of the male mold insert 32a. The inner surface of the plastic part is formed by the male mold core 311a of the male mold 31a. The male mold insert 32a surrounds the male mold 31a and the male mold core 311a. The male mold insert 32a is positioned on the female mold 33a by a tapered pin 34a. The male mold insert 32a is floatingly connected to the male mold 31a by an elastic locking mechanism 35a. In the first direction ox, there is a first offset gap d1 between the male mold insert 32a and the male mold 31a, and a second offset gap d2 between the male mold insert 32a and the elastic locking mechanism 35a. When an external force is applied to the male mold insert 32a, the male mold insert 32a can overcome the force of the elastic locking mechanism 35a and the male mold 31a and move relative to the male mold 31a in the first direction ox.

[0110] See Figure 21 The processing method of the above-mentioned floating injection mold 3a includes the following steps:

[0111] In step S101, the male mold insert 32a and the female mold 33a are locked together by auxiliary screws 41a. The first tapered positioning groove 332a and the second tapered positioning groove 322a are machined, and the mold cavity is rough-machined simultaneously. Figure 17 As shown.

[0112] Step S102: After machining, assemble the tapered pin 34a, and then fix the tapered pin 34a and the male mold insert 32a together, as shown. Figure 18 As shown.

[0113] Step S103: Remove the auxiliary screws, assemble the polishing fixture, and lock the male mold insert 32a, polishing fixture 42a, and female mold 33a together with auxiliary screws 41a. Then, perform precision machining on the mold cavity until polished. Figure 19 and Figure 20 As shown.

[0114] Step S104: After all parts processing is completed, remove the auxiliary screw 41a and take out the male mold insert 32a and female mold 33a.

[0115] Step S105: Mold assembly and trial molding.

[0116] As can be seen, in the above-described processing method of the floating injection mold 3a in this application embodiment, the male mold insert 32a and the female mold 33a are locked together to process the first tapered positioning groove 332a and the second tapered positioning groove 322a. Compared with the method of processing them separately, this improves the positioning accuracy of the male mold insert 32a and the female mold 33a of the floating injection mold 3a. In addition, the male mold insert 32a and the female mold 33a are locked together to rough process the mold cavity position. Then, the male mold insert 32a, the polishing fixture 42a, and the female mold 33a are locked together with auxiliary screws 41a to finish process the mold cavity to polishing. This ensures that the mold cavity is machined together while ensuring the positioning of the male mold insert 32a and the female mold 33a, thereby improving the appearance of the mold cavity after the male mold insert 32a and the female mold 33a are positioned and reducing the generation of step differences.

[0117] Example 2

[0118] See Figures 22 to 27 The floating injection mold 3b includes a male mold 31b, a male mold insert 32b, a female mold 33b, a tapered pin 34b, an elastic locking mechanism 35b, and a female mold insert 36b. The male mold insert 32b and the female mold insert 36b are joined to form a parting surface at the maximum outline of the plastic part. The male mold insert 32b and the female mold insert 36b form the outer surface of the plastic part. The cavity 361b of the female mold insert 36b forms the upper part of the outer surface of the plastic part; the lower part of the outer surface of the plastic part is formed by the cavity 321b of the male mold insert 32b; and the inner surface of the plastic part is formed by the male mold core 311b of the male mold 31b. The female mold insert 36b is connected by an elastic locking mechanism. The fastening mechanism 35b is floatingly connected to the female mold 33b, and the female mold insert 36b is positioned on the male mold insert 32b by a tapered pin 34b; the male mold insert 32b surrounds the male mold core 311b of the male mold 31b, and the male mold insert 32b is fixed to the male mold 31b by a first fastener 37b; in the first direction ox, there is a first offset gap d1 between the female mold insert 36b and the female mold 33b, and a second offset gap d2 between the female mold insert 36b and the elastic locking mechanism 35b; when an external force is applied to the female mold insert 36b, the female mold insert 36b can overcome the friction between the elastic locking mechanism 35b and the female mold 33b and move relative to the female mold 33b in the first direction ox.

[0119] As can be seen, in the above-described floating injection mold 3b of this application embodiment, the female mold insert 36b is positioned by the male mold insert 32b, which avoids the positional deviation between the female mold insert 36b and the male mold insert 32b caused by the positional accuracy of the female mold 33b in the first direction ox, reduces the number of times the mold needs to be adjusted and repaired, and thus improves the development efficiency of plastic parts.

[0120] In addition, during mass production, even if the positioning parts of the male mold 31b and female mold 33b are worn, since the female mold insert 36b is floatingly connected to the female mold 33b and directly positioned by the male mold insert 32b, the misalignment between the female mold insert 36b and the male mold insert 32b is not significant. Therefore, the step difference of the plastic parts is not significantly affected, thereby improving the yield and production efficiency of the plastic parts.

[0121] It should be noted that, in the illustration, the female mold 33b is provided with a mounting groove 335b for mounting the female mold insert 36b, and the female mold insert 36b is floatingly connected to the mounting groove 335b through an elastic locking mechanism 35b. The first offset gap d1 between the female mold insert 36b and the female mold 33b in the first direction can be understood as a first offset gap d1 between the female mold insert 36b and the mounting groove 335b, so that the female mold insert 36b can have an offset space in the first direction ox. In some embodiments of this application, the female mold insert 36b can also be floatingly connected to the female mold 33b through the elastic locking mechanism 35b, and the female mold insert 36b is disposed on the surface of the female mold 33b. The first offset gap d1 between the female mold insert 36b and the female mold 33b in the first direction ox can be understood as a first offset gap d1 between the female mold insert 36b and the female mold 33b, so that the female mold insert 36b can have an offset space in the first direction ox.

[0122] The male mold core 311b and the male mold 31b used for molding the inner surface of plastic parts can be separate structures, connected by screws or pins; in some instances, the male mold core 311b and the male mold 31b can also be a one-piece structure, both processed from the same blank.

[0123] See Figure 26 The tapered pin 34b enables the positioning of the female mold insert 36b and the male mold insert 32b. A portion of the tapered pin 34b is fixed to the male mold insert 32b, while the other portion engages with a first tapered positioning groove 362b on the female mold insert 36b, thus positioning the female mold insert 36b. The tapered pin 34b ensures that the female mold insert 36b and the male mold insert 32b are relatively fixed, and also allows for separation of the female mold insert 36b and the male mold insert 32b after injection molding, facilitating demolding. The tapered pin 34b is fixed to the male mold insert 32b by welding, or the male mold insert 32b is provided with a second tapered positioning groove 322b at a position opposite to the first tapered positioning groove 362b, a part of the tapered pin 34b is self-locked in the second tapered positioning groove 322b, and the other part of the tapered pin 34b is exposed in the male mold insert 32b to cooperate with the first tapered positioning groove 362b.

[0124] In some embodiments of this application, the tapered pin 34b may also be partially fixed to the female mold insert 33b, and the other part of the tapered pin 34b may cooperate with the second tapered positioning groove 322b provided on the male mold insert 32b, so that the tapered pin 34b is positioned on the female mold insert 36b. The use of the tapered pin 34b ensures that the female mold insert 36b can be relatively fixed to the male mold insert 32b, and also allows the female mold insert 36b to be separated from the male mold insert 32b after injection molding, facilitating demolding. The tapered pin 34b is fixed to the female mold insert 36b by welding, or the female mold insert 36b is provided with a first tapered positioning groove 362b at a position opposite to the second tapered positioning groove 322b, a part of the tapered pin 34b is self-locked in the first tapered positioning groove 362b, and the other part of the tapered pin 34b is exposed in the female mold insert 36b to cooperate with the second tapered positioning groove 322b.

[0125] In this embodiment, the number of tapered pins 34b is three. In some embodiments, the number of tapered pins 34b may also be four, five, six, etc. In this embodiment, the number of resilient locking mechanisms 35b is four. In some embodiments, the number of resilient locking mechanisms 35b may also be five, six, etc.

[0126] See Figure 27 The elastic locking mechanism 35b includes a second fastener 351b, a bushing 352b, and an elastic washer 353b. The female mold insert 36b has a mounting hole 363b. The female mold 33b has a screw hole 334b ​​at a position corresponding to the mounting hole 363b. A portion of the bushing 352b is located in the mounting hole 363b, and another portion of the bushing 352b protrudes from the female mold insert 36b. In the first direction ox, a second offset gap d2 exists between the bushing 352b located in the mounting hole 363b and the mounting hole 363b on both sides. The elastic washer 353b is located between the bushing 352b and the female mold insert 36b to provide preload for the second fastener 351b. The second fastener 351b passes sequentially through the bushing 352b, the elastic washer 353b, and the mounting hole 363b and is locked in the screw hole 334b, allowing the female mold insert 36b to float on the female mold 33b.

[0127] When the female mold insert 36b is installed on the female mold 33b, the mounting hole 363b of the female mold insert 36b is aligned with the screw hole 334b ​​of the female mold 33b. An elastic washer 353b and a bushing 352b are installed in the mounting hole 363b. The second fastener 351b is then passed sequentially through the bushing 352b, the elastic washer 353b, and the mounting hole 363b. Rotating the second fastener 351b locks it in the screw hole 334b. Because the bushing 352b and the female mold insert 36b... An elastic washer 353b exists between the two fasteners, providing preload to the second fastener 351b to fix the female mold insert 36b onto the female mold 33b. When an external force in the first direction ox is applied to the female mold insert 36b, due to the second offset gap d2 between the bushing 352b and the mounting hole 363b, the female mold insert 36b can overcome the friction between the female mold insert 36b and the elastic washer 353b, as well as the friction between the female mold insert 36b and the female mold 33b, which is offset in the first direction ox. Therefore, the elastic locking mechanism 35b of this embodiment can ensure the fixed connection between the female mold insert 36b and the female mold 33b when not subjected to external force, and will offset to a certain extent when the female mold insert 36b is subjected to a certain external force in the first direction ox, thereby achieving a floating connection between the female mold insert 36b and the female mold 33b.

[0128] In this embodiment, the portion of the bushing 352b located in the mounting hole 363b is equal to the depth of the mounting hole 363b. In some embodiments, the portion of the bushing 352b located in the mounting hole 363b is less than the depth of the mounting hole 363b. In some embodiments, one end of the bushing 352b near the screw hole 334b ​​protrudes from the mounting hole 363b, and a countersunk hole may be provided at the corresponding portion of the female mold 33b to accommodate the portion of the bushing 352b protruding from the mounting hole 363b.

[0129] In this embodiment, the elastic washer 353b provides preload to the second fastener 351b through elastic deformation. In some examples, the elastic washer 353b may be a spring. In some examples, the elastic washer 353b may also be a plastic elastomer, etc.

[0130] It should be noted that the elastic locking mechanism 35b shown in the embodiments of this application includes a second fastener 351b, a bushing 352b, and an elastic washer 353b. In some embodiments, the elastic locking mechanism 35b may not include a bushing 352b, and may include a second fastener 351b and an elastic washer 353b, wherein the female mold insert 36b is provided with a mounting hole 363b; the female mold 33b is provided with a screw hole 334b ​​at a position corresponding to the mounting hole 363b; in the first direction ox, there is a second offset gap d2 between the two sides of the portion of the second fastener 351b located in the mounting hole 363b and the mounting hole 363b; the elastic washer 353b is located between the second fastener 351b and the female mold insert 36b to provide preload for the second fastener 351b; the second fastener 351b passes through the elastic washer 353b and the mounting hole 363b in sequence and is locked in the screw hole 334b, so that the female mold insert 36b is floatingly connected to the female mold 33b.

[0131] When the female mold insert 36b is installed on the female mold 33b, the mounting hole 363b of the female mold insert 36b is aligned with the screw hole 334b ​​of the female mold 33b. An elastic washer 353b is installed at the mounting hole 363b. The second fastener 351b is then passed through the elastic washer 353b and the mounting hole 363b in sequence. Rotating the second fastener 351b locks it in the screw hole 334b. Because the second fastener 351b is aligned with the female mold insert... An elastic washer 353b exists between parts 36b, providing preload to the second fastener 351b to fix the female mold insert 36b onto the female mold 33b. When an external force in the first direction ox is applied to the female mold insert 36b, due to the second offset gap d2 between the second fastener 351b and the mounting hole 363b, the female mold insert 36b can overcome the frictional force between itself and the elastic washer 353b and the female mold 33b and offset in the first direction ox. Therefore, the elastic locking mechanism 35b of this embodiment can ensure the fixed connection between the female mold insert 36b and the female mold 33b when not subjected to external force, and will offset to a certain extent when the female mold insert 36b is subjected to a certain external force in the first direction ox, thereby achieving a floating connection between the female mold insert 36b and the female mold 33b.

[0132] It should be noted that in the embodiments of this application, the second offset gap d2 is the same size as the first offset gap d1. In some embodiments, the second offset gap d2 is different in size from the first offset gap d1. Due to the difference in the size of the plastic parts, there is a difference in size between the male mold insert 32b and the female mold insert 36b. In the figure, the thickness of the male mold insert 32b is thinner than that of the female mold insert 36b, and the mounting hole 363b of the female mold insert 36b can be provided with a countersunk hole to accommodate the portion of the elastic locking mechanism 35b exposed in the female mold insert 36b. In some embodiments of this application, a clearance hole can also be provided at the position of the male mold insert 32b corresponding to the elastic locking mechanism 35b, which accommodates the portion of the elastic locking mechanism 35b exposed in the female mold insert 36b.

[0133] In the above embodiments of this application, the female mold insert 36b and the female mold 33b may have a first offset gap d1 between them in the first direction ox, so as to avoid positional deviation between the female mold insert 36b and the male mold insert 32b caused by the positional accuracy of the female mold 33b in the first direction ox. In some embodiments of this application, the female mold insert 36b and the female mold 33b may also have a third offset gap in the second direction oy, wherein the second direction oy is perpendicular to the first direction ox. This avoids positional deviation between the female mold insert 36b and the male mold insert 32b caused by the positional accuracy of the female mold 33b in the second direction oy.

[0134] In the second direction oy, the elastic locking mechanism 35b and the mounting hole 363b have a fourth offset gap d4. In some examples of this application, the cross-section of the mounting hole 363b and the cross-section of the elastic locking mechanism 35b are both circular. The difference between the radius of the mounting hole 363b and the radius of the portion of the elastic locking mechanism 35b located within the mounting hole 363b is the fourth offset gap d4. The cross-section of the mating portion of the mounting hole 363b and the elastic locking mechanism 35b is circular for ease of machining. It should be noted that the fourth offset gap d4 may be the same as or different from the third offset gap.

[0135] Combination Figure 25 See Figures 28 to 31This application provides a method for processing a floating injection mold. The floating injection mold 3b includes a male mold 31b, a male mold insert 32b, a female mold 33b, a tapered pin 34b, an elastic locking mechanism 35b, and a female mold insert 36b. The male mold insert 32b and the female mold insert 36b are joined to form a parting surface at the maximum outline of the plastic part. The cavity 361b of the female mold insert 36b forms the upper part of the outer surface of the plastic part, the lower part of the outer surface of the plastic part is formed by the cavity 321b of the male mold insert 32b, and the inner surface of the plastic part is formed by the male mold core 311b of the male mold 31b. The female mold insert 36b is connected by an elastic locking mechanism 35b. The elastic locking mechanism 35b is floatingly connected to the female mold 33b, and the female mold insert 36b is positioned on the male mold insert 32b by a tapered pin 34b; the male mold insert 32b surrounds the male mold core 311b of the male mold 31b, and the male mold insert 32b is fixed to the male mold 31b by fasteners; in the first direction ox, there is a first offset gap d1 between the female mold insert 36b and the female mold 33b, and a second offset gap d2 between the female mold insert 36b and the elastic locking mechanism 35b; when an external force is applied to the female mold insert 36b, the female mold insert 36b can overcome the force of the elastic locking mechanism 35b and the female mold 33b and move relative to the female mold 33b in the first direction ox.

[0136] See Figure 32 The processing method of this floating injection mold includes the following steps:

[0137] In step S201, the female mold insert 36b and the male mold insert 32b are locked together by auxiliary screws 41b to process the first tapered positioning groove 362b and the second tapered positioning groove 322b, while the mold cavity position is rough machined.

[0138] Step S202: After machining, assemble the tapered pin 34b, and then fix the tapered pin 34b and the male mold insert 32b together.

[0139] Step S203: Remove the auxiliary screws and assemble the polishing fixture. Lock the female mold insert 36b, polishing fixture 42b, and male mold insert 32b together with auxiliary screws 41b and finish the mold cavity until polished.

[0140] Step S204: At this point, all part processing is complete. After removing the auxiliary screws, take out the female mold insert 36b and the male mold insert 32b.

[0141] Step S205: Mold assembly and trial molding.

[0142] As can be seen, in the above-described processing method of the floating injection mold 3b in this application embodiment, the female mold insert 36b and the male mold insert 32b are locked together to process the first tapered positioning groove 362b and the second tapered positioning groove 322b. Compared with the method of processing them separately, this improves the positioning accuracy of the female mold insert 36b and the male mold insert 32b of the floating injection mold 3b. In addition, the female mold insert 36b and the male mold insert 32b are locked together to rough machine the mold cavity position. Then, the female mold insert 36b, the polishing fixture 42b, and the male mold insert 32b are locked together with auxiliary screws 41b to finish machine the mold cavity to polish. This ensures that the mold cavity is machined together while ensuring the positioning of the female mold insert 36b and the male mold insert 32b, thereby improving the appearance of the mold cavity after the female mold insert 36b and the male mold insert 32b are positioned and reducing the generation of step differences.

Claims

1. A floating injection mold, characterized in that: The system includes a male mold, a male mold insert, a female mold, a tapered pin, and an elastic locking mechanism. The mating surface between the female mold and the male mold insert is a parting surface located at the maximum outline of the plastic part. The mold cavity of the female mold and the mold cavity of the male mold insert form the outer surface of the plastic part, while the inner surface of the plastic part is formed by the male mold core of the male mold. The male mold insert surrounds the male mold core and is positioned on the female mold by the tapered pin. The male mold insert is floatingly connected to the male mold by the elastic locking mechanism. In a first direction, there is a first offset gap between the male mold insert and the male mold, and a second offset gap between the male mold insert and the elastic locking mechanism. When an external force is applied to the male mold insert, the male mold insert can overcome the force exerted by the elastic locking mechanism and the male mold and move in the first direction.

2. The floating injection mold as described in claim 1, characterized in that: The male mold core and the male mold can be a separate structure or an integrated structure.

3. The floating injection mold as described in claim 1, characterized in that: A portion of the tapered pin is fixed to the male mold insert, and the other portion of the tapered pin engages with the first tapered positioning groove on the female mold, so that the tapered pin is positioned on the female mold.

4. The floating injection mold as described in claim 3, characterized in that: The male mold insert is provided with a second tapered positioning groove, and the tapered pin is welded to the second tapered positioning groove.

5. The floating injection mold as described in claim 3, characterized in that: The number of tapered pins is three.

6. The floating injection mold as described in any one of claims 1-5, characterized in that: The elastic locking mechanism includes a fastener and an elastic washer. The male mold insert is provided with a mounting hole. The male mold is provided with a threaded hole at a position corresponding to the mounting hole. In a first direction, there is a second offset gap between the portion of the fastener located in the mounting hole and the mounting hole. The elastic washer is located between the fastener and the male mold insert to provide preload force for the fastener. The fastener passes through the elastic washer and the mounting hole in sequence and is locked in the threaded hole so that the male mold insert is floatingly connected to the male mold.

7. The floating injection mold as described in claim 6, characterized in that: The resilient locking mechanism further includes a bushing fitted onto the fastener, wherein in a first direction, the portion of the fastener located in the mounting hole has a second offset gap between the bushing and the mounting hole.

8. The floating injection mold as described in claim 6, characterized in that: The elastic washer is a spring or a plastic elastomer.

9. The floating injection mold as described in any one of claims 7-8, characterized in that: The female mold is provided with a clearance hole at the position opposite to the elastic locking mechanism, and the clearance hole accommodates the portion of the elastic locking mechanism located outside the male mold insert.

10. The floating injection mold as described in claim 9, characterized in that: In the second direction, there is a third offset gap between the male mold insert and the male mold, and a fourth offset gap between the mounting hole and the elastic locking mechanism. The second direction is perpendicular to the first direction.

11. The floating injection mold as described in claim 10, characterized in that: The fourth offset gap, the third offset gap, the second offset gap, and the first offset gap are all the same size.

12. A method for processing a floating injection mold, characterized in that, The floating injection mold includes a male mold, a male mold insert, a female mold, a tapered pin, and an elastic locking mechanism. The mating surface between the female mold and the male mold insert is a parting surface located at the maximum outline of the plastic part. The mold cavity of the female mold and the mold cavity of the male mold insert form the outer surface of the plastic part, while the inner surface of the plastic part is formed by the male mold core of the male mold. The male mold insert surrounds the male mold core and is positioned on the female mold by the tapered pin. The male mold insert is floatingly connected to the male mold by the elastic locking mechanism. In a first direction, there is a first offset gap between the male mold insert and the male mold, and a second offset gap between the male mold insert and the elastic locking mechanism. When an external force is applied to the male mold insert, the male mold insert can overcome the force exerted by the elastic locking mechanism and the male mold and move in the first direction. The processing method of the floating injection mold includes the following steps: The male mold insert and the female mold are locked together by auxiliary screws. The first tapered positioning groove and the second tapered positioning groove are machined, and the mold cavity position is rough machined at the same time. After machining, assemble the tapered pins, and then fix the tapered pins and the male mold insert together; Remove the auxiliary screws and assemble the polishing fixture. Lock the male mold insert, polishing fixture, and female mold together with the auxiliary screws and then finish the mold cavity until polished. After all parts processing is completed, remove the auxiliary screws and take out the male mold insert and female mold. Mold assembly and trial molding.

13. A floating injection mold, characterized in that: The system includes a male mold, a male mold insert, a female mold, a tapered pin, an elastic locking mechanism, and a female mold insert. The female mold insert and the male mold insert are joined at a parting surface, which is located at the maximum outline of the plastic part. The mold cavities of the female mold insert and the male mold insert form the outer surface of the plastic part, while the inner surface of the plastic part is formed by the male mold core of the male mold. The male mold insert surrounds the male mold core and is fixed to the male mold by a first fastener. The female mold insert is positioned on the male mold insert by the tapered pin. The female mold insert is floatingly connected to the female mold via the elastic locking mechanism. In a first direction, there is a first offset gap between the female mold insert and the female mold, and a second offset gap between the female mold insert and the elastic locking mechanism. When an external force is applied to the female mold insert, the female mold insert can overcome the force exerted by the elastic locking mechanism and the female mold and move in the first direction.

14. The floating injection mold as described in claim 13, characterized in that: The male mold core and the male mold can be a separate structure or an integrated structure.

15. The floating injection mold as described in claim 13, characterized in that: A portion of the tapered pin is fixed to the male mold insert, and the other portion of the tapered pin engages with the first tapered positioning groove on the female mold, so that the tapered pin is fixed to the female mold insert.

16. The floating injection mold as described in claim 15, characterized in that: The male mold insert is provided with a second tapered positioning groove, and the tapered pin is welded to the second tapered positioning groove.

17. The floating injection mold as described in claim 15, characterized in that: The number of tapered pins is three.

18. The floating injection mold as described in any one of claims 13-17, characterized in that: The elastic locking mechanism includes a second fastener and an elastic washer. The female mold insert has a mounting hole. The female mold has a screw hole at a position corresponding to the mounting hole. In a first direction, there is a second offset gap between the second fastener and the mounting hole on both sides of the portion of the second fastener located in the mounting hole. The elastic washer is located between the second fastener and the female mold insert to provide preload for the second fastener. The second fastener passes through the elastic washer and the mounting hole in sequence and is locked in the screw hole, so that the female mold insert is floatingly connected to the female mold.

19. The floating injection mold as described in claim 18, characterized in that: The elastic locking mechanism further includes a bushing, which is sleeved on the second fastener. In a first direction, the portion of the second fastener located in the mounting hole has a second offset gap between the bushing and the mounting hole.

20. The floating injection mold as described in claim 18, characterized in that: The elastic washer is a spring or a plastic elastomer.

21. The floating injection mold as described in claim 18, characterized in that: In the second direction, there is a third offset gap between the female mold insert and the female mold, and a fourth offset gap between the mounting hole and the elastic locking mechanism. The second direction is perpendicular to the first direction.

22. The floating injection mold as described in claim 21, characterized in that: The fourth offset gap, the third offset gap, the second offset gap, and the first offset gap are all the same size.

23. A method for processing a floating injection mold, characterized in that, The floating injection mold includes a male mold, a male mold insert, a female mold, a tapered pin, an elastic locking mechanism, and a female mold insert. The mating surface between the female mold insert and the male mold insert is at the parting surface, which is located at the maximum outline of the plastic part. The mold cavities of the female mold insert and the male mold insert form the outer surface of the plastic part. The inner surface of the plastic part is formed by the male mold core of the male mold. The male mold insert surrounds the male mold core and is fixed to the male mold by a first fastener. The female mold insert is positioned on the male mold insert by the tapered pin; the female mold insert is floatingly connected to the female mold by the elastic locking mechanism; in a first direction, there is a first offset gap between the female mold insert and the female mold, and a second offset gap between the female mold insert and the elastic locking mechanism; when an external force is applied to the female mold insert, the female mold insert can overcome the force between the elastic locking mechanism and the female mold and move in the first direction; the processing method of the floating injection mold includes the following steps: The male mold insert and the female mold insert are fastened together by auxiliary screws. The first tapered positioning groove and the second tapered positioning groove are machined, and the mold cavity position is rough machined at the same time. After machining, assemble the tapered pins, and then fix the tapered pins and the male mold insert together; Remove the auxiliary screws and assemble the polishing fixture. Lock the male mold insert, polishing fixture, and female mold insert together with the auxiliary screws and then finish the mold cavity until polished. After all parts processing is completed, remove the auxiliary screws and take out the male mold insert and female mold insert; Mold assembly and trial molding.

Images