Molding die and injection molding method

Abstract

The embodiment of the present application discloses a forming die and an injection molding method. The first and second inserts are arranged in the first and second die body parts respectively, and the first and second positioning columns are respectively extended from the first and second forming areas. Thus, the second positioning column is sleeved with the insert to pre-position the insert, and the pre-positioning operation of the insert is simplified. Furthermore, during the closing of the first and second forming areas, the first positioning column can press down the second positioning column, so that the second positioning column gradually replaces the first positioning column to position the insert, ensures that the contact area between the insert positioning part and the insert remains almost unchanged, and further improves the position accuracy of the insert in the horizontal direction. When the first positioning surface and the second forming area clamp the insert, the accuracy of the insert in the height direction is also ensured. At the same time, the injection material is prevented from flowing to the outside of the cavity.

Description

Technical Field

[0001] The present invention relates to the field of injection molding technology, in particular to a molding die and an injection molding method. Background Art

[0002] The insert molding process requires the insert to be pre-positioned in the mold cavity before the molding material is injected. During the injection molding process, the insert must be positioned to ensure accurate positioning within the mold cavity. Simplifying the insert positioning method and ensuring accurate positioning has become a challenge. Summary of the Invention

[0003] In view of this, an embodiment of the present invention provides a molding die and an injection molding method, which utilizes a first insert and a second insert to gradually and alternately position an insert, thereby simplifying the positioning method of the insert and ensuring the position accuracy of the insert in the cavity.

[0004] According to a first aspect of an embodiment of the present invention, a forming mold is provided, the forming mold comprising:

[0005] A first mold body portion having a first molding area;

[0006] a second mold body portion having a second molding area; and

[0007] The insert positioning portion includes a first insert and a second insert arranged in a pair, wherein the first insert and the second insert are respectively arranged on the first mold body portion and the second mold body portion, the first insert includes a first positioning head, the first positioning head extends from the first molding area and the first positioning head has a first positioning surface and a first positioning column protruding from the first positioning surface, and the second insert includes a second positioning column, the second positioning column is operably extended from the second molding area;

[0008] The first positioning head pushes the second positioning column to be withdrawn from the through hole of the insert, and the first positioning column is penetrated into the through hole until the first positioning surface presses the insert in the second molding area, and the first molding area and the second molding area are aligned to form a cavity.

[0009] Furthermore, the second mold body portion has a first accommodating hole;

[0010] The second plunger is disposed in the first receiving hole and is operable to move along the axial direction of the first receiving hole, and the second plunger includes a first position and a second position in the moving direction;

[0011] In the first position, the second positioning post extends from the second molding area and passes through the through hole;

[0012] At the second position, the end of the first positioning column passes through the through hole and pushes the second insert to below the second molding area.

[0013] Furthermore, the second insert is provided with a first locking groove and a first limiting surface which is away from the first mold body portion;

[0014] The second mold body further has a second accommodating hole, and the second accommodating hole is connected to the first accommodating hole;

[0015] The molding die also includes a limiting portion, and the limiting portion also includes a limiting body. The limiting body includes a latch tongue. The limiting body is movably disposed in the second accommodating hole. In the first position, the latch tongue is latched in the first slot. In the second position, the first limiting surface abuts against the second mold body portion.

[0016] Furthermore, the limiting portion further includes:

[0017] a guide body; and

[0018] a first elastic member, the first elastic member being disposed in the second receiving hole, and the elastic force of the first elastic member driving the latch tongue to engage with the first latch slot;

[0019] The limiting body defines a driving groove, and the driving groove faces the first mold body portion;

[0020] The first mold body portion is close to the second mold body portion, and the guide body abuts against the driving slot and drives the latch tongue away from the first latch slot.

[0021] Furthermore, the insert positioning portion further includes a second elastic member;

[0022] The first mold body moves toward the second mold body and passes through a first movement range and a second movement range in sequence;

[0023] In the first movement range, the first positioning post and the second positioning post are in abutment with each other, the latch tongue is engaged with the first latch groove, and the second elastic member generates elastic compression;

[0024] In the second movement range, the guide body drives the latch tongue to separate from the first slot, and the second elastic member stretches and deforms and pushes the second insert to the second position through the first insert.

[0025] Furthermore, the second insert defines a second slot, and in the second position, the latch is opposite to the second slot;

[0026] The first mold body portion is away from the second mold body portion and the guide body is located outside the driving groove. The first elastic member drives the latch tongue to engage with the second latch groove.

[0027] Furthermore, the limiting portion further includes a push rod;

[0028] The inner wall of the second slot has a first guiding slope, the first guiding slope is located on a side of the second slot away from the first insert, and the latch has a first mating surface corresponding to the first guiding slope;

[0029] The latch tongue engages with the second slot and the guide body is located outside the drive slot. The push rod pushes against the second insert and pushes the first mating surface through the first guide slope, and the latch tongue slides from the second slot to the first slot.

[0030] Furthermore, the second mold body portion includes:

[0031] The first mold core includes a main body and a forming body, wherein the main body is provided with an avoidance channel and a third accommodating hole that are interconnected;

[0032] Two second mold cores are operable to move closer to or further away from the forming body and mate with the forming body to form the second forming area, the first accommodating hole and the second accommodating hole are located in the second mold core, and an end of the second insert away from the second positioning post extends into the avoidance channel and moves along the avoidance channel;

[0033] The two second mold cores are in a separated state, and the push rod passes through the third accommodating hole to press against the second insert.

[0034] Furthermore, the second insert is provided with a second limiting surface which is away from the first limiting surface;

[0035] The push rod pushes the second insert to the second position, and the second limiting surface abuts against the second mold body.

[0036] Furthermore, the driving groove passes through the latch tongue, and the side wall of the driving groove has a second guiding inclined surface and a third limiting surface;

[0037] The first mold body defines a fourth accommodating hole, the fourth accommodating hole faces the first mold body portion and communicates with the driving groove;

[0038] The guide body has a second mating surface and a third mating surface, and the third mating surface and the third limiting surface extend parallel to the axial direction of the fourth accommodating hole;

[0039] In the second moving range, the second guiding inclined surface pushes the latch tongue through the second matching surface until the third matching surface slides along the third limiting surface and a portion of the guide body extends into the fourth accommodating hole.

[0040] In a second aspect, an embodiment of the present invention further provides an injection molding method, the injection molding method comprising:

[0041] Step S100: placing an insert in the second molding area, with the through hole of the insert sleeved on the second positioning post, wherein the second positioning post extends from the second molding area;

[0042] Step S200: driving the first molding area and the second molding area toward each other, so that the first positioning head pushes the second positioning post to be withdrawn from the through hole, and the first positioning post is inserted into the through hole until the first positioning surface presses the insert against the second molding area, and the first molding area and the second molding area are aligned to form a molding cavity;

[0043] Step S300: injecting molding material into the mold cavity;

[0044] Step S400: driving the first forming area to separate from the second forming area;

[0045] Step S500: Remove the product.

[0046] Furthermore, the first positioning head pushes the second positioning post to be withdrawn from the through hole, and the first positioning post is passed through the through hole, specifically comprising:

[0047] The first positioning head pushes the second positioning post to below the second molding area, and the latch tongue and the second latch groove are in relative positions, wherein the second insert includes the second positioning post and the second latch groove;

[0048] The step S400 specifically includes:

[0049] The first molding area is driven away from the second molding area, and the two second mold cores are driven away from the first mold core and the second insert is driven away from the product. At the same time, the tongue is engaged with the second slot. The first mold core includes a molding body. The two second mold cores are matched with the molding body to form the second molding area, and the second insert is set on the second mold core.

[0050] Furthermore, the step S400 further includes:

[0051] Step S410: When the two second mold cores are away from the first mold core, the ejector pin is driven to lift the second insert, so that the second positioning column extends from the second molding area and the latch engages with the first slot, wherein the second insert also includes the first slot.

[0052] In the molding mold and injection molding method of the embodiment of the present invention, the first insert and the second insert are respectively arranged in the first mold body part and the second mold body part, and the first positioning head and the second positioning column are respectively extended from the first molding area and the second molding area. Thus, the second positioning column is used to sleeve the insert to pre-position the insert, simplifying the pre-positioning operation of the insert. Furthermore, during the alignment of the first molding area and the second molding area, the first positioning column can press down the second positioning column, so that the second positioning column gradually replaces the first positioning column to position the insert, ensuring that the contact area between the insert positioning part and the insert remains almost unchanged, further improving the position accuracy of the insert in the horizontal direction. When the first positioning surface and the second molding area clamp the insert, the accuracy of the insert in the height direction can also be guaranteed. At the same time, the injection molding material is prevented from flowing to the outside of the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0054] Figure 1 It is a structural diagram of a product according to an embodiment of the present invention;

[0055] Figure 2 1 is a structural schematic diagram of a forming mold according to an embodiment of the present invention;

[0056] Figure 3 1 is an exploded schematic diagram of a forming die according to an embodiment of the present invention;

[0057] Figure 4 Schematic diagram of the positional relationship between the product, the insert positioning portion, and the limiting portion according to an embodiment of the present invention;

[0058] Figure 5 1 is a schematic structural diagram of the second mold body, the second positioning column and the limiting portion according to an embodiment of the present invention;

[0059] Figure 6 2 is a schematic structural diagram of a first mold core and a second mold core according to an embodiment of the present invention;

[0060] Figure 7 2. It is a structural schematic diagram of the first mold body, the first positioning head and the guide body according to an embodiment of the present invention;

[0061] Figure 8 yes Figure 3 A partial cross-sectional view of the AA position in the middle;

[0062] Figure 9 Schematic diagram of the working state of the forming mold in some embodiments of the present invention;

[0063] Figure 10 is a schematic diagram of the working state of the forming mold of the embodiment of the present invention in other implementation modes;

[0064] Figure 11 1 is a flow chart of the injection molding method according to an embodiment of the present invention.

[0065] Description of reference numerals:

[0066] 1-first mold body part;

[0067] 11-first forming area; 1a-first moving range; 1b-second moving range;

[0068] 2- second mold body part;

[0069] 21 - second molding area; 22 - first accommodating hole; 23 - second accommodating hole; 24 - first mold core; 241 - main body; 2411 - avoidance channel; 2412 - third accommodating hole; 242 - molding body; 25 - second mold core; 26 - fourth accommodating hole;

[0070] 3-Insert positioning part;

[0071] 31-first insert; 311-first positioning head;

[0072] 32-second insert; 321-second positioning head; 32a-first position; 32b-second position; 322-first limiting surface; 323-second limiting surface; 324-anti-rotation surface;

[0073] 33- second elastic member;

[0074] 41-first positioning column; 42-second positioning column; 43-first positioning surface; 44-second positioning surface;

[0075] 51-first card slot; 52-second card slot; 521-first guide slope;

[0076] 6-limiting part;

[0077] 61-limiting body; 611-locking tongue; 6111-first mating surface; 612-driving groove; 6121-second guide inclined surface; 6122-third limiting surface; 62-guide body; 621-second mating surface; 622-third mating surface; 63-first elastic member; 64-elevator;

[0078] 7- cavity;

[0079] 81-first connecting surface; 82-second connecting surface; 83-third connecting surface; 84-gate;

[0080] A-Product;

[0081] A1-Insert; A11-Through hole; A2-Injection molding. DETAILED DESCRIPTION

[0082] The present invention is described below based on the following embodiments, but the present invention is not limited to these embodiments. In the detailed description of the present invention below, certain specific details are described in detail. Those skilled in the art can fully understand the present invention without these details. To avoid obscuring the essence of the present invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0083] Furthermore, persons of ordinary skill in the art will appreciate that the figures provided herein are for illustration purposes only and are not necessarily drawn to scale.

[0084] Unless the context clearly requires otherwise, words like “include”, “comprising” and the like throughout this application should be interpreted as including rather than exclusive or exhaustive; that is, as meaning “including but not limited to”.

[0085] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0086] Unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0087] For ease of explanation, spatially relative terms such as "in," "out," "under," "below," "lower," "above," "upper," and the like are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as being "under" or "beneath" another element or feature would then be positioned "above" the other element or feature. Thus, the example term "under" can encompass 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 should be interpreted accordingly.

[0088] Figure 1 It is a schematic structural diagram of product A of this embodiment. Figure 2 It is a structural schematic diagram of the forming mold of this embodiment. Figure 3 : is an exploded schematic diagram of the molding die of this embodiment. The product A includes an insert A1 and an injection molded body A2. The insert A1 is pre-set in the molding die, so that the insert A1 and the injection molded body A2 are fixed together through the insert A1 molding process (Insert Molding). The insert A1 has a through hole A11, which can be configured as a circular hole. The first mold body 1 includes an upper mold core and an upper mold base, and the second mold body 2 includes a first mold core 24, a second mold core 25 and a lower mold base. At the same time, the lower mold base is provided with a slideway for guiding the second mold core 25.

[0089] Figure 4 This is a schematic diagram illustrating the positional relationship between product A, the insert positioning portion 3, and the stopper 6 of this embodiment. The outline of the molded body A2 is shown with dashed lines. The molding die includes the insert positioning portion 3. The insert positioning portion 3 includes a first insert 31 and a second insert 32, arranged in pairs. During the injection molding process, the first and second inserts 31, 32 are positioned correspondingly to the insert A1. The gate 84 shown in the figure is located above the center region of the molded body A2.

[0090] Figure 5 4 is a schematic structural diagram of the second mold body portion 2, the second positioning column 42 and the limiting portion 6 of this embodiment. Figure 6 2 is a schematic structural diagram of the first mold core 24 and the second mold core 25 of this embodiment. Figure 7 3 is a schematic structural diagram of the first mold body 1, the first positioning head 311 and the guide body 62 of this embodiment.

[0091] In some embodiments, as Figure 5-Figure 7As shown, the molding die in this embodiment includes a first mold body portion 1 and a second mold body portion 2. The first mold body portion 1 has a first molding area 11, and the second mold body portion 2 has a second molding area 21. The first insert 31 includes a first positioning head 311, and the first insert 31 includes a second positioning head 321 (as shown in FIG. Figure 6 During the injection molding process, the first positioning head 311 and the second positioning head 321 are aligned to perform a positioning operation on the insert A1.

[0092] Figure 8 yes Figure 3 A partial cross-sectional view of the AA position in FIG. Further reference is made to Figure 8 As shown, the first insert 31 and the second insert 32 are respectively provided in the first mold body portion 1 and the second mold body portion 2. The first positioning head 311 extends from the first molding area 11 and the first positioning head 311 has a first positioning surface 43 and a first positioning column 41 (as shown in FIG. Figure 7 The second inlet 32 ​​includes a second positioning post 42, which is operable to extend from the second molding area 21 (as shown). Figure 6 As shown in FIG. 1 , the first molding area 11 and the second molding area 21 are aligned to form a mold cavity 7. That is, the insert A1 is located inside the mold cavity 7. The molten injection material flows into the mold cavity 7 through the gate 84 and surrounds the insert A1.

[0093] Specifically, the side surfaces of the first and second positioning posts 41, 42 are cylindrical, allowing them to match the shape of the through hole A11. Furthermore, the first positioning surface 43 is an annular surface, with the first positioning post 41 located at the center of the first positioning surface 43, allowing it to match the shape of the top surface of the insert A1.

[0094] Specifically, if Figure 4 As shown, a spring receiving hole is provided at one end of the first insert 31 away from the first positioning head 311 for receiving the second elastic member 33. One end of the second elastic member 33 abuts against the bottom of the spring receiving hole, and the other end abuts against the third connecting surface 83 of the first mold body 1 (as shown in FIG. Figure 8 shown).

[0095] Figure 9 and Figure 10 This is a schematic diagram of the operating state of the molding die of this embodiment. States Ia, Ib, Ic, Id, Ie, and If in the figure represent different stages of the molding die's operation. The position of the third connecting surface 83 is indicated by a dotted line in the figure. The upper third connecting surface 83 in state Ie coincides with the third connecting surface 83 in state Ic, while the lower third connecting surface 83 is the location of the third connecting surface 83 in the current state Ie.

[0096] Further reference Figure 9-10 As shown, the insert positioning portion 3 is configured so that during the process of the first molding area 11 and the second molding area 21 being aligned, the first positioning head 311 presses the second positioning post 42 to move downward, so that the second positioning post 42 is withdrawn from the through hole A11 of the insert A1 and the first positioning post 41 is inserted into the through hole A11 (as shown in FIG. Figure 9-10 (See states Ic and Id in the figure). This continues until the first positioning surface 43 presses the insert A1 against the second molding area 21, and the first molding area 11 and the second molding area 21 align to form the mold cavity 7. Thus, the ends of the insert A1 abut against the second molding area 21 and the first positioning surface 43, respectively, allowing the insert A1 to be stably positioned within the mold cavity 7 and ensuring the accuracy of the insert A1's position within the mold cavity 7. As the molten injection material flows into the mold cavity 7, the position of the insert A1 remains unchanged.

[0097] Specifically, if Figure 6-Figure 7 As shown, the first positioning head 311 faces downward and the second positioning head 321 faces upward. The second positioning head 321 has a second positioning surface 44 and a second positioning column 42 protruding from the second positioning surface 44. Before the first mold body part 1 and the second mold body part 2 are aligned, the operator will first put the insert A1 on the second positioning head 321. In this form, the inner area of ​​the lower end surface of the insert A1 will abut against the second positioning surface 44, and the outer area of ​​the lower end surface of the insert A1 will abut against the second molding area 21. In this embodiment, the second positioning surface 44 is arranged opposite to part of the first positioning surface 43. Thereby, the positioning accuracy of the insert A1 is guaranteed. In addition, after the second positioning head 321 moves below the second molding area 21, the bottom edge of the insert A1 can still be placed on the second molding area 21.

[0098] In summary, in the molding mold of this embodiment, the first insert 31 and the second insert 32 are respectively arranged in the first mold body part 1 and the second mold body part 2, and the first positioning head 311 and the second positioning column 42 are respectively extended from the first molding area 11 and the second molding area 21. As a result, the second positioning column 42 is used to sleeve the insert A1 to pre-position the insert A1, simplifying the pre-positioning operation of the insert A1. Furthermore, during the alignment of the first molding area 11 and the second molding area 21, the first positioning column 41 can press down the second positioning column 42, so that the second positioning column 42 gradually replaces the first positioning column 41 to position the insert A1, ensuring that the contact area between the insert positioning part 3 and the insert A1 remains almost unchanged, further improving the position accuracy of the insert A1 in the horizontal direction. When the first positioning surface 43 and the second molding area 21 clamp the insert A1, the height accuracy of the insert A1 can also be guaranteed. At the same time, the injection molding material is prevented from flowing to the outside of the cavity 7.

[0099] In other embodiments, the first locating head 311 is configured with a magnetic material, allowing the insert A1 to be directly mounted on the first locating head 311. The first locating head 311 magnetically attracts the insert A1, preventing it from falling. In this configuration, the second insert 32 in the second molding area 21 is unnecessary. However, the high temperature within the mold cavity 7 can reduce or even eliminate the magnetic properties of the first locating head 311 after the first molding area 11 and the second molding area 21 align. This can cause the insert A1 to fall from the first locating head 311, shifting its position within the mold cavity 7.

[0100] To this end, the forming mold in the above embodiment utilizes mechanical positioning to greatly improve the yield rate of the product A processed by the forming mold, which helps to reduce manufacturing costs.

[0101] In some embodiments, as Figure 6 and Figure 8 As shown, the second mold body 2 has a first receiving hole 22. A second insert 32 is disposed within the first receiving hole 22 and is operable to move axially along the first receiving hole 22. The second insert 32 is configured to provide a clearance fit with the first receiving hole 22, allowing the second insert 32 to freely move linearly when driven. The top end of the first receiving hole 22 is located in the second molding area 21.

[0102] Further reference Figure 9 State Ia and Figure 10 As shown in state Ie, the second insert 32 has a first position 32a and a second position 32b in its direction of motion. When the second insert 32 is in the first position 32a, the second positioning post 42 extends from the second molding area 21 and penetrates the through-hole A11. This facilitates pre-positioning of the insert A1 and ensures the precise positioning of the insert A1 before the first insert 31 and the second insert 32 are aligned.

[0103] When the second injector 32 is in the second position 32b, the end of the first positioning post 41 passes through the through hole A11 and pushes the second injector 32 below the second molding area 21. This pushes the second injector 32 below the second molding area 21, separating the second injector 32 from the mold cavity 7. This helps the stopper 6 to limit the second injector 32, thereby simplifying the mold opening process.

[0104] In some embodiments, as Figure 8-Figure 9 As shown, the second insert 32 defines a first slot 51 and a first limiting surface 322 that is away from the first mold body portion 1. Figure 5As shown, the second mold body 2 further comprises a second receiving hole 23, which is connected to the first receiving hole 22. That is, when the first receiving hole 22 has a notch, the first latching groove 51 is exposed to the second receiving hole 23 through the notch. The molding die also comprises a retaining portion 6. The retaining portion 6 further comprises a retaining body 61, which includes a latching tongue 611 and is movably disposed within the second receiving hole 23.

[0105] When the second insert 32 is in the first position 32a, the latch 611 moves toward the second insert 32 and engages with the first latching groove 51. This prevents the second insert 32 from falling when the insert A1 is inserted into the second positioning head 321. When the second insert 32 is in the second position 32b, the first limiting surface 322 abuts against the second mold body 2.

[0106] Specifically, if Figure 8 As shown, the first receiving hole 22 has a first connecting surface 81 positioned opposite the first limiting surface 322. In the second position 32b, the limiting body 61 is positioned away from the second insert 32, releasing the second insert 32 from its position. At this point, the first insert 31 can press down on the second insert 32, causing the first limiting surface 322 to align with the first connecting surface 81. Thus, the cooperation between the first limiting surface 322 and the first connecting surface 81 can partially absorb the downward pressure of the first mold body 1, preventing the first positioning surface 43 from exerting excessive pressure on the insert A1, which could cause deformation of the insert A1.

[0107] In some embodiments, as Figure 5 and Figure 9 As shown, the limiting portion 6 further includes a guide body 62 and a first elastic member 63. The first elastic member 63 is disposed in the second accommodating hole 23. Figure 8 As shown, the limiter 61 defines a spring receiving hole. One end of a first elastic member 63 abuts the bottom surface of the spring receiving hole, and the other end abuts the bottom of the second receiving hole 23. The elastic force of the first elastic member 63 drives the latch 611 to engage with the first latching groove 51. The limiter 61 defines a drive groove 612, which faces the first mold body 1, allowing the guide body 62 to extend into the drive groove 612.

[0108] like Figure 10 As shown in state Id, as the first mold portion 1 approaches the second mold portion 2, the guide body 62 abuts the drive slot 612 and drives the latch 611 away from the first latch slot 51. Thus, this embodiment utilizes the downward pressure of the first mold portion 1 to drive the limiter 61, simplifying the driving method of the limiter 6. Furthermore, during the alignment of the first mold portion 1 and the second mold portion 2, the second insert 32 can be automatically released from the limit.

[0109] In some embodiments, as Figure 8As shown, the insert positioning portion 3 also includes a second elastic member 33. Figure 9-10 As shown, the first mold body portion 1 will sequentially pass through the first moving range 1 a and the second moving range 1 b during the process of moving toward the second mold body portion 2 .

[0110] When the first mold body part 1 is in the first movement range 1a ( Figure 9 and Figure 10 The first mold body portion 1 is located at the third connecting surface 83 , the first positioning post 41 and the second positioning post 42 are in contact with each other, the latch 611 is engaged with the first latch groove 51 , and the second elastic member 33 generates elastic compression.

[0111] Specifically, the second elastic member 33 is a compression spring. The limiter 61 restricts the position of the second insert 32. The guide body 62 extends into the drive slot 612 but does not contact the sidewalls of the drive slot 612, or it contacts the sidewalls of the drive slot 612 but the latch 611 remains within the first latching slot 51. This prevents the second insert 32 from moving downward, while the third connecting surface 83 continuously approaches the first insert 31, compressing the second elastic member 33. In this configuration, the second elastic member 33 is in a force accumulation phase, with its length decreasing from L1 to L2.

[0112] When the first mold body 1 is in the second movement range 1b, the guide 62 drives the latch 611 away from the first slot 51, and the second elastic member 33 stretches and deforms (the length of the second elastic member 33 increases from L2 to L3). The first insert 31 then pushes the second insert 32 to the second position 32b. In this embodiment, the position-limiting member 61 releases the position-limiting portion 6, and the second elastic member 33 is in the release phase, allowing the second insert 32 to rapidly move downward under the elastic force of the second elastic member 33. This allows the first positioning post 41 to quickly replace the second positioning post 42.

[0113] Specifically, the first mold body 1 continues to move downward in the second movement range 1b until the first molding area 11 and the second molding area 21 align to form the mold cavity 7. As a result, the first mold body 1 and the second elastic member 33 simultaneously provide downward pressure, allowing the first positioning post 41 to be inserted into the through hole A11 at a relatively fast speed, while the second positioning post 42 can also be withdrawn from the through hole A11 at a relatively fast speed.

[0114] In summary, the second elastic member 33 in this embodiment can prevent the first mold body 1 from making rigid contact with the insert A1 through the first insert 31, and the elastic force of the second elastic member 33 can be used to prevent the insert A1 from being crushed. On the other hand, the first positioning head 311 and the second positioning head 321 quickly replace the positioning insert A1, ensuring the position accuracy of the insert A1 in the cavity 7. On the other hand, after the tongue 611 is disengaged from the first slot 51, the second insert 32 can be prevented from falling directly to the bottom of the first accommodating hole 22. This makes the length of the first positioning column 41 entering the through hole A11 and the length of the second positioning column 42 withdrawing change synchronously. Thereby, the positioning accuracy of the insert A1 is improved.

[0115] In some embodiments, as Figure 10 As shown, the second insert 32 defines a second slot 52. At the second position 32b, the latch 611 is disposed opposite the second slot 52. When the first mold body 1 moves away from the second mold body 2, and when the guide body 62 is located outside the drive slot 612, the first elastic member 63 drives the latch 611 to engage with the second slot 52. This prevents the second insert 32 from falling toward the bottom of the first accommodating hole 22, ensuring the extended height of the second positioning head 321. Figure 6 As shown, the second insert 32 is further provided with a rotation-stopping surface 324 that is away from the first and second slots 51 and 52 . The rotation-stopping surface 324 abuts against and slides relative to the inner wall of the first receiving hole 22 , thereby preventing the second insert 32 from rotating under the action of the latch 611 .

[0116] In some embodiments, as Figure 5 、 Figure 6 and Figure 8 As shown, the limiting portion 6 also includes a push rod 64. Figure 9 As shown, the inner wall of the second slot 52 has a first guide slope 521, which is located on the side of the second slot 52 away from the first insert 31. The latch 611 has a first mating surface 6111 corresponding to the first guide slope 521. The latch 611 engages with the second slot 52, and the guide body 62 is located outside the drive slot 612. The push rod 64 abuts the second insert 32 and pushes against the first mating surface 6111 via the first guide slope 521, causing the latch 611 to slide from the second slot 52 to the first slot 51. In this embodiment, the push rod 64 resets the second insert 32, allowing it to extend from the second molding area 21 again.

[0117] In some embodiments, as Figure 5 As shown, the second mold body 2 includes a first mold core 24 and two second mold cores 25. Figure 6 and Figure 8As shown, the first mold core 24 includes a main body 241 and a forming body 242. The main body 241 defines an avoidance channel 2411 and a third accommodating hole 2412 that are interconnected. The two second mold cores 25 can be operated to move closer to or farther from the forming body 242 and mate with the forming body 242 to form the second forming area 21. The first accommodating hole 22 and the second accommodating hole 23 are located in the second mold core 25. The end of the second insert 32 away from the second positioning column 42 extends into the avoidance channel 2411 and moves along the avoidance channel 2411 (as shown in FIG. Figure 8 When the two second mold cores 25 are in the separated state, the push rod 64 passes through the third accommodating hole 2412 and abuts against the second insert 32.

[0118] Specifically, the bottom of the first accommodating hole 22 is connected to the top of the avoidance channel 2411. When the second inlet 32 ​​is in the second position 32b, the bottom of the second inlet 32 ​​does not contact the bottom of the avoidance channel 2411, thereby preventing friction between the second inlet 32 ​​and the first mold core 24. Figure 5 The middle dotted line II is the projection outline of the insert A1 on the second mold body part 2. Figure 5 As shown, the edge areas on the opposite sides of the top surfaces of the two second mold cores 25 form part of the second molding area 21. After the injection molding is completed, the first mold body 1 and the second mold body 2 are separated, and the two second mold cores 25 are separated from each other. In this form, Figure 10 In the middle state IF, the two second mold cores 25 respectively drive the two second inserts 32 to move horizontally. This allows the second inserts 32, located at the second position 32b, to avoid interference with the insert A1. When the two second mold cores 25 separate, the edges of the molded body A2 are suspended, facilitating removal of the product A from the mold. Simultaneously, the ejector pin 64 also re-elevates the second inserts 32 during this process.

[0119] In some embodiments, as Figure 9 As shown, the second insert 32 defines a second limiting surface 323 that is away from the first limiting surface 322. The push rod 64 pushes the second insert 32 to the second position 32b, and the second limiting surface 323 abuts against the second mold body 2.

[0120] Specifically, refer to Figure 8 As shown, the second mold body 2 has a second connecting surface 82 opposite the second limiting surface 323. When the second connecting surface 82 abuts the second limiting surface 323, it can limit the position of the second insert 32. The first engaging slot 51 also has a first guiding slope 521. When the push rod 64 is lifted too far, the first guiding slope 521 of the first engaging slot 51 can be used to ensure that the tongue 611 falls accurately into the first engaging slot 51.

[0121] In some embodiments, as Figure 9As shown, the driving groove 612 passes through the latch 611, and the side wall of the driving groove 612 has a second guiding inclined surface 6121 and a third limiting surface 6122. Figure 5 and Figure 8 As shown, the first mold body defines a fourth accommodating hole 26, which faces the first mold body portion 1 and communicates with the driving groove 612. The guide body 62 has a second mating surface 621 and a third mating surface 622. The third mating surface 622 and the third limiting surface 6122 extend parallel to the axial direction of the fourth accommodating hole 26.

[0122] Further reference Figure 10 As shown, within the second movement range 1b, the second guide slope 6121 pushes the latch 611 through the second mating surface 621 until the third mating surface 622 slides along the third limiting surface 6122 and a portion of the guide body 62 extends into the fourth accommodating hole 26 .

[0123] The fourth receiving hole 26 in this embodiment is used to avoid the end position of the guide body 62, preventing interference between the guide body 62 and the second mold core 25. The third mating surface 622 cooperates with the third limiting surface 6122, allowing the latch 611 to be stably positioned away from the second insert 32. This simplifies the method by which the limiting portion 6 drives the insert positioning portion 3.

[0124] Optionally, the number of the insert positioning parts 3 and the limiting parts 6 can be adjusted according to the number of inserts A1. Figure 1 As shown, when the number of the inserts A1 is two, the number of the insert positioning portion 3 and the number of the limiting portion 6 can be configured as two respectively.

[0125] Figure 11 Schematic diagram of the injection molding process of this embodiment.

[0126] In some embodiments, as Figure 11 As shown, the product A in this embodiment can be made by the following injection molding method.

[0127] Step S100: Insert A1 is placed in the second molding area 21, with the through-hole A11 of insert A1 fitted over the second positioning post 42. The second positioning post 42 extends from the second molding area 21. During this step, the first and second mold sections 1 and 2 are separated, with the second molding area 21 open upward. This simplifies the installation of insert A1.

[0128] Step S200: Drive the first molding area 11 and the second molding area 21 toward each other, so that the first positioning head 311 pushes the second positioning post 42 out of the through hole A11, and the first positioning post 41 penetrates the through hole A11 until the first positioning surface 43 presses the insert A1 against the second molding area 21, and the first molding area 11 and the second molding area 21 align to form the mold cavity 7. Thus, this step achieves the precise positioning of the insert A1 in the mold cavity 7.

[0129] Specifically, when the first positioning head 311 pushes the second positioning post 42 to the bottom of the second molding area 21 , the latch 611 is in a relative position with the second latch slot 52 . The second insert 32 includes the second positioning post 42 and the second latch slot 52 .

[0130] Step S300: injecting molding material into the mold cavity 7. In this step, the molten molding material flows into the mold cavity 7 through the gate 84 and surrounds the insert A1.

[0131] Step S400 : driving the first forming area 11 and the second forming area 21 to separate.

[0132] Specifically, after the product A is cooled, the first molding area 11 and the second molding area 21 are separated to ensure that the shape of the product A is intact.

[0133] Specifically, if Figure 10 In the middle state IF, the first molding area 11 is driven away from the second molding area 21, and the two second mold cores 25 are driven away from the first mold core 24, driving the second insert 32 away from the product A. Simultaneously, the latch 611 engages with the second latch groove 52. The first mold core 24 includes a molding body 242, and the two second mold cores 25 align with the molding body 242 to form the second molding area 21. The second insert 32 is positioned within the second mold core 25. This prevents interference between the second insert 32 and the insert A1. For example, the two output shafts of two driving cylinders can be connected to the two second mold cores 25, respectively, to drive the two second mold cores 25 toward or away from each other.

[0134] Furthermore, this step also includes step S410: With the two second mold cores 25 positioned away from the first mold core 24, the ejector pin 64 is driven to lift the second insert 32, causing the second positioning post 42 to extend from the second molding area 21 and the latch 611 to engage with the first latching groove 51. The second insert 32 also includes the first latching groove 51. Thus, the ejector pin 64 is used to reposition the second insert 32, ready for installation of the next insert A1.

[0135] Step S500: Remove product A.

[0136] In summary, the injection molding method in this embodiment utilizes the second positioning post 42 to sleeve the insert A1 to pre-position the insert A1, thereby simplifying the pre-positioning operation of the insert A1. Furthermore, during the alignment of the first molding area 11 and the second molding area 21, the first positioning post 41 can press down the second positioning post 42, so that the second positioning post 42 gradually replaces the first positioning post 41 to position the insert A1, ensuring that the contact area between the insert positioning portion 3 and the insert A1 remains almost unchanged, further improving the horizontal positioning accuracy of the insert A1. When the first positioning surface 43 and the second molding area 21 clamp the insert A1, the height accuracy of the insert A1 can also be guaranteed. At the same time, the injection molding material is prevented from flowing to the outside of the cavity 7.

[0137] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A molding die, characterized in that: The forming mold comprises: A first mold body portion (1) having a first molding area (11); A second mold body portion (2) having a second molding area (21); and An insert positioning portion (3) includes a first insert (31) and a second insert (32) arranged in a pair, wherein the first insert (31) is arranged on the first mold body portion (1), and the second insert (32) is arranged on the second mold body portion (2), the first insert (31) includes a first positioning head (311), the first positioning head (311) extends from the first molding area (11), and the first positioning head (311) has a first positioning surface (43) and a first positioning column (41) protruding from the first positioning surface (43), and the second insert (32) includes a second positioning column (42), and the second positioning column (42) can be operably extended from the second molding area (21); The first positioning head (311) pushes the second positioning column (42) to be withdrawn from the through hole (A11) of the insert (A1), and the first positioning column (41) is passed through the through hole (A11) until the first positioning surface (43) presses the insert (A1) in the second molding area (21), and the first molding area (11) and the second molding area (21) are aligned to form a cavity.

2. The molding die according to claim 1, wherein: The second mold body portion (2) has a first accommodating hole (22); The second plunger (32) is disposed in the first receiving hole (22) and is operable to move along the axial direction of the first receiving hole (22), and the second plunger (32) includes a first position (32a) and a second position (32b) in the moving direction; At the first position (32a), the second positioning column (42) extends from the second molding area (21) and passes through the through hole (A11); At the second position (32b), the end of the first positioning column (41) passes through the through hole (A11) and pushes the second insert (32) to the bottom of the second molding area (21).

3. The forming die according to claim 2, wherein: The second insert (32) is provided with a first clamping groove (51) and a first limiting surface (322) which is away from the first mold body (1); The second mold body (2) further has a second accommodating hole (23), and the second accommodating hole (23) is connected to the first accommodating hole (22); The molding die further comprises a limiting portion (6), the limiting portion (6) further comprises a limiting body (61), the limiting body (61) comprises a latching tongue (611), the limiting body (61) is movably arranged in the second accommodating hole (23), in the first position (32a), the latching tongue (611) is latched in the first latching groove (51), and in the second position (32b), the first limiting surface (322) abuts against the second mold body portion (2).

4. The forming die according to claim 3, wherein: The limiting portion (6) further includes: a guide body (62); and A first elastic member (63), wherein the first elastic member (63) is disposed in the second receiving hole (23), and the elastic force of the first elastic member (63) drives the latch tongue (611) to engage with the first latch groove (51); The limiting body (61) is provided with a driving groove (612), and the driving groove (612) faces the first mold body part (1); The first mold body portion (1) is close to the second mold body portion (2), and the guide body (62) abuts against the driving groove (612) and drives the latch tongue (611) away from the first latch groove (51).

5. The forming die according to claim 4, wherein: The insert positioning portion (3) further includes a second elastic member (33); The first mold body part (1) moves toward the second mold body part (2) and passes through a first movement range (1a) and a second movement range (1b) in sequence; In the first movement range (1a), the first positioning column (41) and the second positioning column (42) are in an abutting state and the latch tongue (611) is engaged with the first latch groove (51), while the second elastic member (33) generates elastic compression; In the second moving range (1b), the guide body (62) drives the latch tongue (611) to separate from the first latch groove (51), and the second elastic member (33) stretches and deforms and pushes the second insert (32) to the second position (32b) through the first insert (31).

6. The forming die according to claim 4, wherein: The second insert (32) is provided with a second slot (52), and in the second position (32b), the latch tongue (611) is opposite to the second slot (52); The first mold body portion (1) is away from the second mold body portion (2) and the guide body (62) is located outside the driving groove (612). The first elastic member (63) drives the latch tongue (611) to engage with the second latch groove (52).

7. The forming die according to claim 6, wherein: The limiting portion (6) further includes a push rod (64); The inner wall of the second slot (52) has a first guiding slope (521), the first guiding slope (521) is located on a side of the second slot (52) away from the first insert (31), and the latch tongue (611) has a first mating surface (6111) corresponding to the first guiding slope (521); The latch tongue (611) is engaged with the second slot (52) and the guide body (62) is located outside the driving slot (612); the push rod (64) pushes against the second insert (32) and pushes against the first matching surface (6111) through the first guide inclined surface (521); and the latch tongue (611) slides from the second slot (52) to the first slot (51).

8. The molding die according to claim 7, wherein: The second mold body part (2) comprises: The first mold core (24) comprises a main body (241) and a forming body (242), wherein the main body (241) is provided with an avoidance channel (2411) and a third accommodating hole (2412) that are interconnected; Two second mold cores (25) are operable to move closer to or farther away from the forming body (242) and mate with the forming body (242) to form the second forming area (21); the first accommodating hole (22) and the second accommodating hole (23) are located in the second mold core (25); and the second insert (32) extends into the avoidance channel (2411) at one end away from the second positioning column (42) and moves along the avoidance channel (2411); The two second mold cores (25) are in a separated state, and the push rod (64) passes through the third accommodating hole (2412) to push against the second insert (32).

9. The forming die according to claim 7, wherein: The second inlet (32) is provided with a second limiting surface (323) which is away from the first limiting surface (322); The push rod (64) pushes the second insert (32) to the second position (32b), and the second limiting surface (323) abuts against the second mold body (2).

10. The molding die according to claim 5, wherein: The driving groove (612) passes through the latch tongue (611), and the side wall of the driving groove (612) has a second guiding inclined surface (6121) and a third limiting surface (6122); The first mold body is provided with a fourth accommodating hole (26), the fourth accommodating hole (26) facing the first mold body portion (1) and communicating with the driving groove (612); The guide body (62) has a second mating surface (621) and a third mating surface (622), and the third mating surface (622) and the third limiting surface (6122) extend parallel to the axial direction of the fourth accommodating hole (26); In the second movement range (1b), the second guide slope (6121) pushes the tongue (611) through the second mating surface (621) until the third mating surface (622) slides along the third limiting surface (6122) and part of the guide body (62) extends into the fourth accommodating hole (26).

11. An injection molding method, characterized in that: The injection molding method comprises: Step S100: placing an insert (A1) in the second molding area (21), and sleeve the through hole (A11) of the insert (A1) on the second positioning post (42), wherein the second positioning post (42) extends from the second molding area (21); Step S200: driving the first molding area (11) and the second molding area (21) to approach each other, so that the first positioning head (311) pushes the second positioning column (42) to be withdrawn from the through hole (A11), and the first positioning column (41) is inserted into the through hole (A11), until the first positioning surface (43) presses the insert (A1) in the second molding area (21), and the first molding area (11) and the second molding area (21) are aligned to form a mold cavity (7); Step S300: injecting molding material into the mold cavity (7); Step S400: driving the first forming area (11) and the second forming area (21) to separate; Step S500: Remove the product (A).

12. The injection molding method according to claim 11, characterized in that: The first positioning head (311) pushes the second positioning column (42) to be withdrawn from the through hole (A11), and the first positioning column (41) is passed through the through hole (A11), specifically comprising: The first positioning head (311) pushes the second positioning column (42) to the bottom of the second molding area (21), and the latch tongue (611) and the second latch groove (52) are in relative positions, wherein the second insert (32) includes the second positioning column (42) and the second latch groove (52); The step S400 specifically includes: The first molding area (11) is driven away from the second molding area (21), and the two second mold cores (25) are driven away from the first mold core (24) and the second insert (32) is driven away from the product (A), and at the same time the latch (611) is engaged with the second latch groove (52), wherein the first mold core (24) includes a molding body (242), the two second mold cores (25) and the molding body (242) are matched to form the second molding area (21), and the second insert (32) is arranged on the second mold core (25).

13. The injection molding method according to claim 12, wherein: The step S400 further includes: Step S410: When the two second mold cores (25) are in a state of being away from the first mold core (24), the push rod (64) is driven to lift the second insert (32), so that the second positioning column (42) extends from the second molding area (21), and the latch tongue (611) is engaged with the first latch groove (51), wherein, The second insert (32) further includes the first card slot (51).

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