Molding mold and injection molding method

Abstract

The embodiment of the invention discloses a forming mold and an injection molding method, a first insert core and a second insert core are respectively arranged on a first mold body part and a second mold body part, and a first positioning head and a second positioning column respectively extend out of a first forming area and a second forming area. Therefore, the second positioning column is used for sleeving the insert, so that the insert is pre-positioned, and the pre-positioning operation of the insert is simplified. Furthermore, in the process of folding the first forming area and the second forming area, the first positioning column can press the second positioning column downwards, so that the second positioning column gradually replaces the first positioning column to position the insert, and the contact area between the insert positioning part and the insert is almost kept unchanged front and back; and the position precision of the insert in the horizontal direction is further improved. And when the first positioning surface and the second forming area clamp the insert, the precision of the insert in the height direction can be ensured. And meanwhile, the injection molding material is prevented from flowing to the outer side of the cavity.

Description

Technical Field

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

[0002] The insert molding process requires that the insert be pre-set in the cavity before injecting the injection molding material into the cavity. During the injection molding process, the insert also needs to be positioned to ensure the position accuracy of the insert in the cavity. How to simplify the positioning method of the insert and ensure the position accuracy of the insert has become a problem that needs to be solved. 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 molding die is provided, the molding die 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 pairs, wherein the first insert and the second insert are respectively arranged on the first mold body portion and the second mold body portion, wherein 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, and the second positioning column can be 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 through 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 matched to form a cavity.

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

[0010] The second insert is disposed in the first receiving hole and can be operatively moved along the axial direction of the first receiving hole, and the second insert includes a first position and a second position in the moving direction;

[0011] In the first position, the second positioning column 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 slot and a first limiting surface which is away from the first mold body;

[0014] The second mold body portion 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, the limiting portion also includes a limiting body, the limiting body includes a latch tongue, and 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, wherein the first elastic member is disposed in the second receiving hole, and the elastic force of the first elastic member drives the latch tongue to engage with the first latch groove;

[0019] The limiting body is provided with a driving groove, and the driving groove faces the first mold body part;

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

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

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

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

[0024] In the second moving range, the guide body drives the latch tongue to separate from the first latch groove, 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 is provided with a second card slot, and in the second position, the card tongue is opposite to the second card 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, and 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 at a side of the second slot away from the first insert, and the latch has a first matching surface corresponding to the first guiding slope;

[0029] The latch tongue is engaged with the second slot and the guide body is located outside the driving slot, the push rod abuts against the second insert and pushes the first matching 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 comprises a main body and a forming body, wherein the main body is provided with an avoidance passage and a third containing hole which are interconnected;

[0032] Two second mold cores are operable to approach or move 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 one end of the second insert away from the second positioning column 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 push against the second insert.

[0034] Furthermore, the second entry 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 is connected to 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 guiding 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, and sleeve the through hole of the insert on the second positioning column, wherein the second positioning column extends from the second molding area;

[0042] Step S200: driving the first molding area and the second molding area to approach each other, so that the first positioning head pushes the second positioning column to be withdrawn from the through hole, and the first positioning column is inserted 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 matched to form a cavity;

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

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

[0045] Step S500: Remove the product.

[0046] Further, the first positioning head pushes the second positioning column to be withdrawn from the through hole, and the first positioning column is inserted into the through hole, specifically comprising:

[0047] The first positioning head pushes the second positioning column to the bottom of 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 column 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 drive the second insert to be away from the product, and at the same time the latch tongue is engaged with the second latch groove, 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 arranged 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 push rod is driven to lift the second insert, so that the second positioning column extends from the second molding area and the latch tongue is engaged with the first latch groove, wherein the second insert also includes the first latch groove.

[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 insert is sleeved with the second positioning column to pre-position the insert, simplifying the pre-positioning operation of the insert. Furthermore, in the process of the first molding area and the second molding area being matched, 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 before and after, 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 is a schematic structural diagram of a product according to an embodiment of the present invention;

[0055] Figure 2 is a schematic structural diagram of a molding die according to an embodiment of the present invention;

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

[0057] Figure 4 is a schematic diagram of the positional relationship between the product and the insert positioning portion and the limiting portion of the embodiment of the present invention;

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

[0059] Figure 6 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 It is a schematic structural diagram of the first mold body part, 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;

[0062] Fig. 9 is a schematic diagram of the working state of the molding die of an embodiment of the present invention in some implementation modes;

[0063] Fig.10 is a schematic diagram of the working state of the molding die of the embodiment of the present invention in other implementation modes;

[0064] Fig.11 It is a schematic 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 molding area; 1a-first moving range; 1b-second moving range;

[0068] 2- the 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-rotation-stopping 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 matching surface; 612-driving groove; 6121-second guiding inclined surface; 6122-third limiting surface; 62-guide body; 621-second matching surface; 622-third matching surface; 63-first elastic member; 64-elevator;

[0078] 7- cavity;

[0079] 81-first connection surface; 82-second connection surface; 83-third connection 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 embodiments, but the present invention is not limited to these embodiments. In the detailed description of the present invention below, some specific details are described in detail. It is possible for a person skilled in the art to fully understand the present invention without the description of these details. In order to avoid confusing the essence of the present invention, known methods, processes, flows, components and circuits are not described in detail.

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

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

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

[0086] Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0087] For ease of explanation, spatially relative terms such as "inside", "outside", "below", "below", "lower", "above", "upper", etc. 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 include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figure is turned over, an element described as being "below" or "below" other elements or features will then be positioned as being "above" the other elements or features. Thus, the example term "below" can include both the orientations of above and below. 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 diagram of the structure of product A of this embodiment. Figure 2 It is a schematic structural diagram of the molding die of this embodiment. Figure 3 It 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, and the through hole A11 can be configured as a circular hole. The first mold body part 1 includes an upper mold core and an upper mold base, and the second mold body part 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 Schematic diagram of the positional relationship between the product A and the insert positioning portion 3 and the limit portion 6 of this embodiment. The outline of the injection molding body A2 in the figure is shown by dotted lines. The molding die includes an 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 insert 31 and the second insert 32 are arranged corresponding to the insert A1. The gate 84 in the figure is located above the middle area of ​​the injection molding 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 Schematic diagram of the structure of the first mold core 24 and the second mold core 25 of this embodiment. Figure 7 It is a schematic structural diagram of the first mold body part 1, the first positioning head 311 and the guide body 62 of this embodiment.

[0091] In some embodiments, Figure 5-Figure 7As shown, the molding die in this embodiment includes a first mold body 1 and a second mold body 2. The first mold body 1 has a first molding area 11, and the second mold body 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 positioning operation on the insert A1.

[0092] Figure 8 yes Figure 3 A partial cross-sectional view of the AA position in FIG. Figure 8 As shown, the first insert 31 and the second insert 32 are respectively disposed 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 (such as Figure 7 The second inlet 32 ​​includes a second positioning post 42, and the second positioning post 42 can be operatively extended from the second molding area 21 (as shown in FIG. Figure 6 As shown in FIG. 1 ). The first molding area 11 and the second molding area 21 are combined 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 positioning column 41 and the second positioning column 42 are both cylindrical surfaces, so that the first positioning column 41 and the second positioning column 42 can match the shape of the through hole A11. At the same time, the first positioning surface 43 is a circular surface, and the first positioning column 41 is located at the center of the first positioning surface 43, so that the first positioning surface 43 can match the top surface shape of the insert A1.

[0094] Specifically, 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] Fig. 9 and Fig.10 : is a schematic diagram of the working state of the molding die of this embodiment. The states Ⅰa, Ⅰb, Ⅰc, Ⅰd, Ⅰe and Ⅰf in the figure are respectively different stages of the molding die in operation. The position of the third connecting surface 83 is shown by a dotted line in the figure, wherein the third connecting surface 83 located at the top in the state Ⅰe coincides with the third connecting surface 83 in the state Ⅰc, and the third connecting surface 83 located at the bottom is the position 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 column 42 to move downward, so that the second positioning column 42 is withdrawn from the through hole A11 of the insert A1 and the first positioning column 41 is inserted into the through hole A11 (as shown in FIG. Figure 9-10 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 are aligned to form the mold cavity 7. As a result, the two ends of the insert A1 are respectively in contact with the second molding area 21 and the first positioning surface 43, so that the insert A1 can be stably set in the mold cavity 7, ensuring the position accuracy of the insert A1 in the mold cavity 7. When the injection material in the molten state flows into the mold cavity 7, the position of the insert A1 can remain unchanged.

[0097] Specifically, 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 portion 1 and the second mold body portion 2 are aligned, the operator will first sleeve 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 a part of the first positioning surface 43. Thereby, the positioning accuracy of the insert A1 is ensured. 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. Therefore, the insert A1 is sleeved by the second positioning column 42 to pre-position the insert A1, simplifying the pre-positioning operation of the insert A1. Furthermore, in the process of the first molding area 11 and the second molding area 21 being matched, 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 before and after, 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 direction accuracy of the insert A1 can also be guaranteed. At the same time, the injection material is prevented from flowing to the outside of the cavity 7.

[0099] In other embodiments, the first positioning head 311 is configured as a magnetic material, so that the insert A1 can be directly mounted on the first positioning head 311, and the first positioning head 311 attracts the insert A1 through magnetic force to prevent it from falling. In this form, it is not necessary to set the second insert 32 in the second molding area 21. However, the temperature in the cavity 7 is relatively high. When the first molding area 11 and the second molding area 21 are aligned, the magnetism of the first positioning head 311 at high temperature will be reduced or even disappear, causing the insert A1 to fall from the first positioning head 311, so that the position of the insert A1 in the cavity 7 changes.

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

[0101] In some embodiments, Figure 6 and Figure 8 As shown, the second mold body 2 has a first receiving hole 22. The second inlet 32 ​​is disposed in the first receiving hole 22 and can be operated to move along the axial direction of the first receiving hole 22. The second inlet 32 ​​is configured to be clearance-matched with the first receiving hole 22, so that the second inlet 32 ​​can freely move linearly under driving. The top end of the first receiving hole 22 is located in the second molding area 21.

[0102] Further reference Fig. 9 State Ia and Fig.10 As shown in the state IE in FIG. 1 , the second insert 32 includes a first position 32a and a second position 32b in the moving direction. When the second insert 32 is in the first position 32a, the second positioning column 42 extends from the second molding area 21 and penetrates the through hole A11. Thus, it is convenient to pre-position the insert A1, and the position accuracy of the insert A1 is ensured before the first insert 31 and the second insert 32 are matched.

[0103] When the second injector 32 is at the second position 32b, the end of the first positioning column 41 passes through the through hole A11 and pushes the second injector 32 to the bottom of the second molding area 21. Thus, the second injector 32 is pushed to the bottom of the second molding area 21, so that the second injector 32 is separated from the mold cavity 7, which helps the limiting part 6 to limit the second injector 32, thereby simplifying the mold opening process of the molding mold.

[0104] In some embodiments, 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 also has a second accommodating hole 23, and the second accommodating hole 23 is connected to the first accommodating hole 22. That is, when the first accommodating hole 22 has a notch, the first clamping groove 51 is exposed to the second accommodating hole 23 through the notch. The molding die also includes a limiting portion 6. The limiting portion 6 also includes a limiting body 61, and the limiting body 61 includes a clamping tongue 611, and the limiting body 61 is movably disposed in the second accommodating hole 23.

[0105] When the second insert 32 is in the first position 32a, the latch tongue 611 moves toward the second insert 32 and is latched in the first latch groove 51. Thus, the second insert 32 is prevented from falling when the insert A1 is sleeved on 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, Figure 8 As shown, the first receiving hole 22 has a first connecting surface 81 arranged opposite to the first limiting surface 322. When in the second position 32b, the limiting body 61 is configured to be away from the second insert 32 to release the limiting of the second insert 32. At this time, the first insert 31 can press down the second insert 32, so that the first limiting surface 322 fits with the first connecting surface 81. Therefore, by using the cooperation between the first limiting surface 322 and the first connecting surface 81, part of the downward pressure of the first mold body 1 can be borne, so as to avoid excessive pressure exerted by the first positioning surface 43 on the insert A1, resulting in deformation of the insert A1.

[0107] In some embodiments, Figure 5 and Fig. 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 is provided with a spring receiving hole. One end of the first elastic member 63 abuts against the bottom surface of the spring receiving hole, and the other end abuts against the bottom of the second receiving hole 23. The elastic force of the first elastic member 63 drives the latch tongue 611 to engage with the first latch groove 51. The limiter 61 is provided with a driving groove 612, which faces the first mold body 1, so that the guide body 62 can extend into the driving groove 612.

[0108] like Fig.10 As shown in the state Id in FIG, during the process of the first mold body 1 approaching the second mold body 2, the guide body 62 abuts against the driving groove 612 and drives the latch 611 away from the first latch groove 51. Therefore, in this embodiment, the downward pressure of the first mold body 1 is used to drive the limiter 61, simplifying the driving method of the limiter 6. In addition, during the process of the first mold body 1 and the second mold body 2 being matched, the second insert 32 can be automatically released from the limit.

[0109] In some embodiments, 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 movement toward the second mold body portion 2 .

[0110] When the first mold body part 1 is in the first movement range 1a ( Fig. 9 and Fig.10 The position of the first mold body portion 1 is represented by the third connecting surface 83 , the first positioning column 41 and the second positioning column 42 are in abutment with each other, and the latch tongue 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 limiting body 61 limits the position of the second insert 32, and the guide body 62 extends into the driving groove 612, but does not contact the side wall of the driving groove 612, or has contacted the side wall of the driving groove 612, but the latch 611 is still in the first latching groove 51. As a result, the second insert 32 will not move downward, and the third connecting surface 83 continues to approach the first insert 31, so that the second elastic member 33 is compressed. In this form, the second elastic member 33 is in the force accumulation stage, and the length of the second elastic member 33 is reduced from L1 to L2.

[0112] When the first mold body 1 is 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 (the length of the second elastic member 33 increases from L2 to L3), and the second insert 32 is pushed to the second position 32b by the first insert 31. The limiting body 61 in this embodiment releases the limiting part 6, and the second elastic member 33 is in the release stage, so that the second insert 32 moves down quickly under the elastic force of the second elastic member 33. Thus, the first positioning column 41 is quickly replaced with the second positioning column 42.

[0113] Specifically, when the first mold body 1 is in the second moving range 1b, it continues to move downward until the first molding area 11 and the second molding area 21 are aligned to form the mold cavity 7. Thus, the first mold body 1 and the second elastic member 33 simultaneously provide downward pressure, so that the first positioning column 41 can be inserted into the through hole A11 at a faster speed, and the second positioning column 42 can also be withdrawn from the through hole A11 at a faster speed.

[0114] In summary, the second elastic member 33 in this embodiment can prevent the first mold body 1 from being in 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 avoid crushing of the insert A1. 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 latch 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. The length of the first positioning column 41 entering the through hole A11 changes synchronously with the length of the second positioning column 42 being pulled out. Thereby, the positioning accuracy of the insert A1 is improved.

[0115] In some embodiments, Fig.10 As shown, the second insert 32 is provided with a second slot 52, and at the second position 32b, the latch tongue 611 is arranged opposite to the second slot 52. When the first mold body 1 is away from the second mold body 2, and when the guide body 62 is located outside the driving slot 612, the first elastic member 63 drives the latch tongue 611 to engage with the second slot 52. Thus, the second insert 32 is prevented from falling to the bottom of the first receiving hole 22, and the extension height of the second positioning head 321 is ensured. Figure 6 As shown, the second insert 32 is further provided with a rotation-stopping surface 324 which is away from the first slot 51 and the second slot 52 , and the rotation-stopping surface 324 is in contact with and slides relatively to the inner wall of the first receiving hole 22 , thereby preventing the second insert 32 from rotating under the action of the latch tongue 611 .

[0116] In some embodiments, Figure 5 , Figure 6 and Figure 8 As shown, the limiting portion 6 also includes a push rod 64. Fig. 9 As shown, the inner wall of the second slot 52 has a first guide slope 521, and the first guide slope 521 is located on the 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 guide 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 mating surface 6111 through the first guide slope 521, so that the latch tongue 611 slides from the second slot 52 to the first slot 51. In this embodiment, the second insert 32 is reset by the push rod 64, so that the second insert 32 can be extended from the second molding area 21 again.

[0117] In some embodiments, 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 body 241 and a forming body 242. The body 241 is provided with an avoidance channel 2411 and a third accommodating hole 2412 that are interconnected. The two second mold cores 25 can be operated to approach or move away from the forming body 242 and mate with the forming body 242 to form a 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 a separated state, the push rod 64 passes through the third receiving 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 at the second position 32b, the bottom of the second inlet 32 ​​does not contact the bottom of the avoidance channel 2411, thereby avoiding 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 is separated from the second mold body 2, and the two second mold cores 25 are separated from each other. Fig.10 As shown in the middle state Ⅰf, the two second mold cores 25 will respectively drive the two second inserts 32 to move horizontally. Therefore, the second insert 32 located at the second position 32b can avoid interference with the insert A1. When the two second mold cores 25 are separated, the edge position of the injection molded body A2 will be in a suspended state, thereby facilitating the removal of the product A from the molding mold. At the same time, the ejector 64 can also lift the second insert 32 again during this process.

[0119] In some embodiments, Fig. 9 As shown, the second inlet 32 ​​defines a second limiting surface 323 which is away from the first limiting surface 322. The push rod 64 pushes the second inlet 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 to the second limiting surface 323. When the second connecting surface 82 abuts against the second limiting surface 323, the second insert 32 can be limited. The first clamping slot 51 also has a first guiding inclined surface 521. When the lifting range of the push rod 64 is too large, the first guiding inclined surface 521 of the first clamping slot 51 can be used to make the tongue 611 accurately fall into the first clamping slot 51.

[0121] In some embodiments, Fig. 9As shown, 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. Figure 5 and Figure 8 As shown, the first mold body opens a fourth accommodating hole 26, which faces the first mold body part 1 and communicates 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.

[0122] Further reference Fig.10 As shown, within the second moving range 1 b , the second guiding inclined surface 6121 pushes the latch tongue 611 through the second matching surface 621 until the third matching surface 622 slides along the third limiting surface 6122 and a portion of the guiding body 62 extends into the fourth accommodating hole 26 .

[0123] The fourth accommodating hole 26 in this embodiment is used to avoid the end position of the guide body 62 to prevent the guide body 62 from interfering with the second mold core 25. The third matching surface 622 cooperates with the third limiting surface 6122, so that the tongue 611 can be stably located away from the second insert 32. Thus, the driving method of the limiting part 6 on the insert positioning part 3 is simplified.

[0124] Optionally, the number of the insert positioning parts 3 and the limiting parts 6 can be adjusted according to the number of the 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 respectively configured as two.

[0125] Fig.11 It is a schematic flow chart of the injection molding method of this embodiment.

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

[0127] Step S100: The insert A1 is arranged in the second molding area 21, and the through hole A11 of the insert A1 is sleeved on the second positioning column 42. The second positioning column 42 extends from the second molding area 21. In this step, the first mold body 1 and the second mold body 2 are in a separated state, and the second molding area 21 is open upward. Thus, the installation method of the insert A1 is simplified.

[0128] Step S200: Drive 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 against the second molding area 21, and the first molding area 11 and the second molding area 21 are aligned to form the cavity 7. Therefore, this step realizes the precise positioning of the insert A1 in the cavity 7.

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

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

[0131] Step S400 : driving the first molding area 11 and the second molding 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, Fig.10 As shown 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 away from the first mold core 24 and drive the second insert 32 away from the product A. 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. In this way, the second insert 32 can be prevented from interfering with the insert A1. For example, the two output shafts of the two driving cylinders are respectively connected to the two second mold cores 25, so that the two second mold cores 25 are driven to move closer to or away from each other through the two driving cylinders.

[0134] Furthermore, this step also 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 up 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. The second insert 32 also includes the first latch groove 51. Thus, the push rod 64 is used to reset the second insert 32 to wait for the 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 column 42 to sleeve the insert A1 to pre-position the insert A1, thereby simplifying the pre-positioning operation of the insert A1. Furthermore, in the process of the first molding area 11 and the second molding area 21 being aligned, 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, thereby ensuring that the contact area between the insert positioning portion 3 and the insert A1 remains almost unchanged, thereby 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 accuracy of the height direction of the insert A1 can also be ensured. At the same time, the injection molding material is prevented from flowing to the outside of the cavity 7.

[0137] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A molding die, characterized in that: The molding die 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), comprising a first insert (31) and a second insert (32) arranged in 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) comprises 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) comprises 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 inserted into 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) are matched to form a cavity.

2. The molding die according to claim 1, characterized in that: The second mold body portion (2) has a first accommodating hole (22); The second insert (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 insert (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 molding die according to claim 2, characterized in that: The second insert (32) is provided with a first locking groove (51) and a first limiting surface (322) which is away from the first mold body (1); The second mold body part (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), in the second position (32b), the first limiting surface (322) is in contact with the second mold body portion (2).

4. The molding die according to claim 3, characterized in that: The limiting portion (6) further comprises: 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 latching tongue (611) to engage with the first latching 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 molding die according to claim 4, characterized in that: The insert positioning portion (3) further comprises a second elastic member (33); The first mold body part (1) moves toward the second mold body part (2) and passes through a first moving range (1a) and a second moving range (1b) in sequence; In the first moving range (1a), the first positioning column (41) and the second positioning column (42) are in abutment with each other and the latch tongue (611) is engaged with the first latch groove (51), and at the same time, 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 molding die according to claim 4, characterized in that: 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 far away from the second mold body portion (2) and the guide body (62) is located outside the driving groove (612), and the first elastic member (63) drives the latching tongue (611) to engage with the second latching groove (52).

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

8. The molding die according to claim 7, characterized in that: 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) which are interconnected; Two second mold cores (25) are operable to be close to or away from the molding body (242) and to be matched with the molding body (242) to form the second molding area (21); the first accommodating hole (22) and the second accommodating hole (23) are located in the second mold core (25); and one 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); The two second mold cores (25) are in a separated state, and the push rod (64) passes through the third accommodating hole (2412) to abut against the second insert (32).

9. The molding die according to claim 7, characterized in that: The second entry (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, characterized in that: 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) faces the first mold body portion (1) and is in communication with the driving groove (612); The guide body (62) has a second matching surface (621) and a third matching surface (622), and the third matching surface (622) and the third limiting surface (6122) extend parallel to the axial direction of the fourth accommodating hole (26); In the second moving range (1b), the second guiding inclined surface (6121) pushes the latch 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 guiding body (62) extends into the fourth receiving 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 column (42), wherein the second positioning column (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 matched to form a cavity (7); Step S300: injecting molding material into the mold cavity (7); Step S400: driving the first molding area (11) and the second molding 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 inserted into 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 a relative position, 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 drive the second insert (32) away from the product (A), and at the same time the latch tongue (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, characterized in that: 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 up 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 comprises the first card slot (51).

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