A molding die for a multi-insert injection molded product

Abstract

The application discloses a forming die for a multi-insert injection molded part, which realizes the zoned forming of a box-shaped main body, an extension plate and a wing plate by distributing the forming cavity wall on a front die, a rear die and two horizontal inclined drawing modules; a columnar insert is clamped and fixed by the fixed parts of the front die and the rear die from the upper and lower sides; a plate-shaped insert is adsorbed and positioned by the air suction fixed parts on the side drawing module; a Z-shaped insert and a cubic insert are supported and pre-positioned by the supporting parts and the staggered clamping parts on the rear die; the fixing structures of the inserts are independent of each other and do not interfere with each other, and the reliable pre-fixing problems of four different types of inserts are solved in the single die; the middle section of the wing plate is formed by the mold closing of the two horizontally colliding inclined drawing modules, the demolding direction is consistent with the extension direction of the extension plate, and the structural cooperation difficulty of multi-direction demolding is solved; the supporting parts make the bottom surfaces of the staggered inserts and the bottom surface of the cavity form uniform glue positions, ensure that the resin can completely cover the inserts, and avoid the displacement of the inserts caused by the injection pressure.

Description

Technical Field

[0001] This invention relates to the field of armature irregular part forming mold technology, and in particular to a forming mold for multi-insert injection molded parts. Background Technology

[0002] Insert injection molding is a process in which metal inserts are pre-placed in a mold cavity, and then molten resin is injected to bond them together. Compared with ordinary injection molded parts, the molds for multi-insert injection molded parts need to simultaneously consider both the cavity forming accuracy and the reliability of insert positioning, and the mold structure is usually more complex.

[0003] For products with a small number of inserts and a simple distribution, a conventional front and rear mold opening and closing structure, combined with simple insert fixing slots or magnetic positioning, can meet the molding requirements. However, when the product has many types of inserts, their spatial positions are intertwined, and the product itself has a complex structure, mold design will face several interrelated challenges.

[0004] In actual production, injection molded products often have a variety of insert types and spatial orientations, and require multi-directional demolding and precise suspended positioning of internal inserts. Existing molds cannot simultaneously solve the problems of reliable fixing of multiple types of inserts, structural fit for multi-directional demolding, and suspended positioning of interlaced inserts within a single mold, making it difficult to meet the injection molding requirements of this type of product. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a molding die for multi-insert injection molded parts, including a front mold and a rear mold that cooperate with each other; The bottom surface of the front mold is provided with a first molding cavity wall and two second molding cavity walls, and the two second molding cavity walls are spaced apart on both sides of the first molding cavity wall; the bottom surface of the front mold on both sides of the second molding cavity wall is provided with a first insert fixing part for fixing the columnar insert; The front mold is provided with a first inclined extraction module and a second inclined extraction module. The first inclined extraction module and the second inclined extraction module are arranged on both sides of the center line with the line connecting the first molding cavity wall and the second molding cavity wall as the center line. The first inclined extraction module and the second inclined extraction module open and close the mold in the horizontal direction. The first oblique extraction module is provided with a third molding cavity wall that is opposite to the first molding cavity wall and two fourth molding cavity walls, which are respectively located on both sides of the third molding cavity wall; both the third molding cavity wall and the fourth molding cavity wall are provided with a second insert fixing part for fixing the plate-shaped insert, and the second insert fixing part makes the plate-shaped insert form a glue position with the molding cavity wall; The second inclined drawing module has a fifth forming cavity wall at a position corresponding to the two fourth forming cavity walls; A sixth molding cavity wall is provided at the upper end of the rear mold corresponding to the first molding cavity wall, and a seventh molding cavity wall and an eighth molding cavity wall are opposite to the sixth molding surface; the sixth molding cavity wall is provided with a support portion and a misalignment locking portion protruding from the bottom surface of the molding cavity, the support portion is used to form a glue position between the bottom surface of the staggered Z-shaped inserts and the cubic inserts filling the gaps between them and the bottom surface of the molding cavity, and the misalignment locking portion is used to pre-fix the staggered Z-shaped inserts and the cubic inserts; extension plate molding cavities for molding the extension plate are also provided on both sides of the sixth molding cavity wall. The rear mold is provided with a ninth molding cavity wall at a position corresponding to the second molding cavity. The ninth molding cavity wall is provided with a third insert fixing part on both sides in the horizontal direction for cooperating with the first insert fixing part to fix the columnar insert. The first molding cavity wall, the third molding cavity wall, the sixth molding cavity wall, the seventh molding cavity wall, the eighth molding cavity wall, and the extension plate molding cavity are molded together to form the mold cavity of the box-shaped body and the extension plate; The fourth and fifth molding cavity walls are joined together to form the central mold cavity of the wing plate; The second molding cavity wall and the ninth molding cavity wall are molded together to form the end mold cavity of the wing plate.

[0006] Preferably, the sixth molding cavity wall is provided with two spaced-apart pillars, and the intersecting part of the two Z-shaped pieces is located between the two pillars; the side walls of the pillars and the side walls of the adjacent eighth molding cavity wall are both supported by protrusions for fitting and fixing with the recesses corresponding to the cubic inserts. The bottom of the side wall of the eighth forming cavity is provided with supporting bosses, which are used to support the ends of the two intersecting Z-shaped parts and cooperate with the two columns to form a misaligned locking part.

[0007] Preferably, the extension plate forming cavity of the front mold is located on one side of the eighth forming cavity wall, and the extension plate forming cavity is provided with a first limiting protrusion near the supporting boss. The first limiting protrusion is used to limit the Z-shaped part together with the eighth forming cavity wall during mold closing and injection molding.

[0008] Preferably, the eighth molding cavity wall is provided with a second limiting protrusion on the side near the third molding cavity wall. The second limiting protrusion is used to limit the lower end of the plate-shaped insert in the middle part together with the third molding cavity wall during mold closing and injection molding.

[0009] Preferably, the front mold is provided with a third oblique extraction module, the end of which extends to the upper end of the plate-shaped insert located in the middle of the box-shaped body, and is used to limit the upper end of the plate-shaped insert in the middle of the box-shaped body together with the third molding cavity wall during mold closing and injection molding.

[0010] Preferably, the second insert fixing part is an adsorption fixing structure.

[0011] Preferably, the second molding cavity wall, the ninth molding cavity wall, the first insert fixing part and the third insert fixing part are all provided on the detachable mold insert.

[0012] Preferably, the upper end face of the eighth forming cavity wall is chamfered.

[0013] The multi-insert injection molding die provided in this invention achieves partitioned molding of the box-shaped main body, extension plate, and wing plate by distributing the molding cavity walls onto the front mold, rear mold, and two horizontal oblique pull modules. Columnar inserts are clamped and fixed from the top and bottom by the fixing parts of the front and rear molds; plate-shaped inserts are adsorbed and positioned by the air suction fixing parts on the side pull modules; and Z-shaped and cubic inserts are supported and pre-positioned by the support and misalignment locking parts on the rear mold. The fixing structures of each insert are independent and do not interfere with each other, simultaneously solving the problem of reliable pre-fixation of four different types of inserts within a single mold. Simultaneously, the middle section of the wing plate is formed by the closing of two horizontally opposing oblique pull modules, with its demolding direction consistent with the extension direction of the extension plate, solving the structural fit problem of multi-directional demolding. The support part ensures that the bottom surface of the staggered inserts forms a uniform glue position with the bottom surface of the cavity, ensuring that the resin can completely cover the inserts and avoiding insert displacement or exposed substrate defects caused by injection pressure. This invention achieves integrated injection molding of multiple types of inserts within a single mold. Attached Figure Description

[0014] Figure 1 This is a perspective view of a molding die for a multi-insert injection molded part provided in an embodiment of the present invention; Figure 2 This is a 3D model of the front mold; Figure 3 This is a schematic diagram showing the positions of the first, second, and third oblique extraction modules; Figure 4 This is a schematic diagram of the upper end of the plate-shaped insert in the middle of the end limiting box-shaped body of the third inclined extraction module; Figure 5 This is a 3D view of the first oblique extraction module; Figure 6 This is a three-dimensional view of the rear mold; Figure 7 for Figure 6 Enlarged view of section C; Figure 8 for Figure 6 Enlarged view of section D; Figure 9 This is a top view of the rear mold; Figure 10 for Figure 9 Enlarged view of section E in the middle; Figure 11 A 3D view of the injection-molded product; Figure 12This is a side view of the injection-molded product. Wherein: A1, box-shaped main body; A2, middle part of wing plate; A3, end of wing plate; A4, extension plate; B1, columnar insert; B2, plate-shaped insert; B3, Z-shaped insert; B4, cube insert; 11. Front mold fixing plate; 111. Glue inlet; 12. Front mold plate; 121. Negative pressure connector; 13. Front mold core; 131. First molding cavity wall; 132. Second molding cavity wall; 133. First insert fixing part; 134. First angled pull module; 1341. Third molding cavity wall; 1342. Fourth molding cavity wall; 1343. Second insert fixing part; 13431. Adsorption port; 135. Second angled pull module; 1351. Fifth molding cavity wall; 136. Third angled pull module; 21. Rear mold core; 211. Sixth molding cavity wall; 2111. Extension plate molding cavity; 21111. First limiting protrusion; 2112. Column; 212. Seventh molding cavity wall; 213. Eighth molding cavity wall; 2131. Supporting boss; 2132. Chamfer; 2133. Second limiting protrusion; 214. Ninth molding cavity wall; 2141. Third insert fixing part; 215. Supporting protrusion; 22. Rear template; 23. Ejector plate; 24. Rear mold fixing plate. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention is further described below in conjunction with specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods. Unless otherwise specified, the materials and reagents used in the following embodiments can be obtained commercially.

[0016] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0018] A molding die for a multi-insert injection molded part includes a front mold and a rear mold that cooperate with each other; The bottom surface of the front mold is provided with a first molding cavity wall 131 and two first molding cavity walls 132, and the two first molding cavity walls 132 are spaced apart on both sides of the first molding cavity wall 131; the bottom surface of the front mold on both sides of the first molding cavity wall 132 is provided with a first insert fixing part 133 for fixing the columnar insert B1. The front mold is provided with a first inclined extraction module 134 and a second inclined extraction module 135. The first inclined extraction module 134 and the second inclined extraction module 135 are arranged on both sides of the center line with the line connecting the first molding cavity wall 131 and the first molding cavity wall 132 as the center line. The first inclined extraction module 134 and the second inclined extraction module 135 open and close the mold in the horizontal direction. The first oblique extraction module 134 is provided with a third molding cavity wall 1341 that is opposite to the first molding cavity wall 131 and two fourth molding cavity walls 1342, which are respectively located on both sides of the third molding cavity wall 1341; both the third molding cavity wall 1341 and the fourth molding cavity wall 1342 are provided with a second insert fixing part 1343 for fixing the plate-shaped insert B2, and the second insert fixing part 1343 makes the plate-shaped insert B2 form a glue position with the molding cavity wall; The second oblique drawing module 135 is provided with a fifth forming cavity wall 1351 at a position corresponding to the two fourth forming cavity walls 1342; The upper end of the rear mold is provided with a sixth molding cavity wall 211 at a position corresponding to the first molding cavity wall 131, and a seventh molding cavity wall 212 and an eighth molding cavity wall 213 that are opposite to the sixth molding surface; the sixth molding cavity wall 211 is provided with a support portion and a misalignment locking portion protruding from the bottom surface of the molding cavity. The support portion is used to make the bottom surface of the staggered Z-shaped inserts B3 and the cubic inserts B4 filling the gaps between them form a glue position with the bottom surface of the molding cavity. The misalignment locking portion is used to pre-fix the staggered Z-shaped inserts B3 and the cubic inserts B4; the sides of the sixth molding cavity wall 211 are also provided with extension plate A4 molding cavities 2111 for molding the extension plate A4. The rear mold is provided with a ninth molding cavity wall 214 at a position corresponding to the second molding cavity. The ninth molding cavity wall 214 is provided with a third insert fixing part 2141 on both sides in the horizontal direction for cooperating with the first insert fixing part 133 to fix the columnar insert B1. The first molding cavity wall 131, the third molding cavity wall 1341, the sixth molding cavity wall 211, the seventh molding cavity wall 212, the eighth molding cavity wall 213, and the molding cavity 2111 of the extension plate A4 are molded together to form the mold cavity of the box-shaped main body A1 and the extension plate A4. The fourth molding cavity wall 1342 and the fifth molding cavity wall 1351 are joined together to form the A2 mold cavity in the middle of the wing plate; The first molding cavity wall 132 and the ninth molding cavity wall 214 are molded together to form the end cavity A3 of the wing plate.

[0019] In specific implementation, such as Figure 11 , Figure 12 As shown, the multi-insert injection molded product has an overall elongated structure, including a box-shaped main body A1 in the middle and wing plate structures on both sides. The ends of the wing plates are provided with columnar inserts B1 that are perpendicular to the surface of the wing plates. Each of the two wing plates and the bottom surface of the box-shaped main body is provided with a plate-shaped insert B2; The box-shaped main body A1 is embedded with two staggered Z-shaped inserts B23 and a cubic insert B4 located between the staggered Z-shaped inserts B23.

[0020] The mold used in this embodiment for molding multi-insert injection molded parts, such as Figures 1-10 As shown, Including front mold and rear mold, such as Figure 1 As shown, the front mold includes a front mold fixing plate 11, a front mold template, and a front mold core 13 arranged sequentially. The front mold fixing plate 11 is provided with a glue inlet 111, which is guided to the molding cavity through a flow channel. The molding cavity arm of the front mold is arranged on the front mold core 13. The rear mold includes a rear mold core 21, a rear template 22, an ejector plate 23, and a rear mold fixing plate 24 arranged sequentially. The ejector plate 23 is provided with ejector pins extending into the molding cavity for ejecting the molded product. The molding cavity wall of the rear mold is set on the rear mold core 21. The front mold fixing plate 11, the front template and the front mold core 13, the rear mold core 21, the rear template 22, the ejector plate 23, and the rear mold fixing plate 24, as well as their connection relationship and working principle, are existing technologies in this field and will not be described in detail here. Through the cooperation of the front and rear molds and the coordinated action of multiple oblique drawing modules, Z-shaped inserts, cubic inserts, columnar inserts and plate-shaped inserts can be fixed and formed simultaneously in a single mold.

[0021] When the mold is in the mold-closed injection state, the front mold and the rear mold fit tightly together in the vertical direction.

[0022] The first molding cavity wall 131 on the bottom surface of the front mold forms the molding surface of the top surface of the box-shaped body; two first molding cavity walls 132 (corresponding to the molding part on the upper surface of the end of the wing plate) are spaced apart on both sides of the first molding cavity wall 131 for molding the upper surface of the end of the two wing plates; each first molding cavity wall 132 is provided with a first insert fixing part 133 on both sides. The fixing part adopts a groove structure that matches the shape of the end of the columnar insert. Before injection molding, the columnar insert is placed in it and fixed so that it remains stable at the predetermined position at the end of the wing plate. like Figure 3 As shown, a first inclined extraction module 134 and a second inclined extraction module 135 are respectively installed on both sides of the front mold. These two inclined extraction modules are set along the extension direction of the wing plate (i.e., the horizontal direction), including but not limited to being driven by a hydraulic cylinder or an inclined guide column to close the mold in the opposite direction and open the mold in the opposite direction in the horizontal direction. The first oblique drawing module 134 is provided with a third forming cavity wall 1341, which intersects the first forming cavity wall 131 at an angle, and is used to form the lower side of the side of the box-shaped main body with the extension plate; a fourth forming cavity wall 1342 is provided on each side of the third forming cavity wall 1341, and is used to form one side surface of the middle section of the wing plate; a second insert fixing part 1343 is embedded in both the third forming cavity wall 1341 and the fourth forming cavity wall 1342. In this embodiment, a negative pressure adsorption structure is adopted, by setting negative pressure adsorption ports 13431 at both ends of the second insert fixing part 1343 (e.g. Figure 5 As shown), the pressure adsorption port 13431 is connected to the negative pressure connector 121 provided on the side wall, thereby adsorbing and fixing the plate-shaped insert B2 in the preset position, and maintaining a uniform glue injection gap between the surface of the plate-shaped insert B2 and the molding cavity wall. The second inclined drawing module 135 is provided with two fifth forming cavity walls 1351, whose positions correspond one-to-one with the two fourth forming cavity walls 1342 on the first inclined drawing module 134. When the mold is closed, the fourth forming cavity walls 1342 and the fifth forming cavity walls 1351 collide and fit together to form a complete mold cavity in the middle section of the wing plate; The upper surface of the rear mold 200 is provided with a sixth molding cavity wall 211, corresponding to the molding of the bottom surface of the box-shaped main body and the lower surface of the extension plate; the sixth molding cavity wall 211 is provided with an upwardly protruding support part and a misalignment locking part; the support part consists of multiple bosses or ribs of equal height, used to support two staggered Z-shaped inserts and cubic inserts, so that a uniform glue layer is formed between the bottom surface of the three and the bottom surface of the sixth molding cavity wall 211; the misalignment locking part prevents the inserts from shifting under injection pressure by cooperating with the sides or recessed parts of the Z-shaped inserts and cubic inserts; The sixth forming cavity wall 211 is also provided with extension plate forming cavities 2111 on both sides. The cavity extends horizontally outward and is used to form the lower surface and side surface of the extension plate. The rear mold 200 is also provided with a seventh molding cavity wall 212 and an eighth molding cavity wall 213, which respectively form the inner surfaces of the two side walls of the box-shaped main body; the rear mold 200 is also provided with a ninth molding cavity wall 214, which corresponds to the first molding cavity wall 132, and the two together form a complete mold cavity at the end of the wing plate when the mold is closed. The ninth molding cavity wall 214 is provided with a third insert fixing part 2141 on both sides, which cooperates with the first insert fixing part 133 to hold and fix the columnar insert from both sides.

[0023] The mold closing process in this embodiment is as follows: Before injection molding, the mold is in the open state, the front mold and the rear mold are separated in the vertical direction, and the first inclined pulling module 134 and the second inclined pulling module 135 are retracted in the horizontal direction. Rear mold insert installation: Two Z-shaped inserts are placed alternately on the sixth molding cavity wall 211 of the rear mold. The staggered part of the two Z-shaped inserts is inserted between the two pillars 2112. The two ends of the Z-shaped inserts are respectively placed on the support protrusions at the bottom of the eighth molding cavity wall 213. The cube insert is placed in the gap between the two Z-shaped inserts, so that the recessed parts on both sides are engaged with the support protrusions on the side walls of the pillars 2112 and the side walls of the eighth molding cavity wall 213, respectively. At this time, the bottom surfaces of the Z-shaped inserts and the cube inserts are supported by the support parts, and a uniform glue gap is maintained between them and the bottom surface of the sixth molding cavity wall 211. Front mold insert installation: The columnar insert is placed into the first insert fixing part 133 on the bottom surface of the front mold, so that the columnar insert is fixed at a predetermined position at the end of the wing plate; Installation of the angled pull module insert: Each plate-shaped insert is attached to the third molding cavity wall 1341 and the two fourth molding cavity walls 1342 of the first angled pull module 134, and is fixed by adsorption by the second insert fixing part 1343, forming a uniform glue injection gap between the surface of the plate-shaped insert and the molding cavity wall. Vertical mold closing: The front mold moves downwards in the vertical direction and closes with the rear mold; at this time, the first molding cavity wall 131, the sixth molding cavity wall 211, the seventh molding cavity wall 212, and the eighth molding cavity wall 213 together form the preliminary outline of the box-shaped main body mold cavity; the first molding cavity wall 132 and the ninth molding cavity wall 214 close, and the first insert fixing part 133 and the third insert fixing part 2141 clamp and fix the columnar insert from the upper and lower sides to form the end mold cavity of the wing plate; Horizontal mold closing: The first inclined extraction module 134 and the second inclined extraction module 135 move towards each other in the horizontal direction and close with the rear mold; the third molding cavity wall 1341 of the first inclined extraction module 134 fits against the corresponding surface of the rear mold 200, and the fourth molding cavity wall 1342 collides and closes with the fifth molding cavity wall 1351 of the second inclined extraction module 135 to form the middle mold cavity of the wing plate; the extension plate molding cavity 2111 closes with the corresponding surface to form the extension plate mold cavity; at this time, the second limiting protrusion 2131 and the third molding cavity wall 1341 jointly clamp the lower end of the middle plate-shaped insert, and the third inclined extraction module 136 (if any) descends to the upper end of the plate-shaped insert to complete the locking of all inserts. At this time, all mold cavities are closed and injection molding can be performed.

[0024] After injection molding is completed, the mold opens in the reverse order of mold closing to ensure that the molded product can be easily demolded. This will not be elaborated on here.

[0025] The multi-insert injection molding die provided in this invention achieves partitioned molding of the box-shaped main body, extension plate, and wing plate by distributing the molding cavity walls onto the front mold, rear mold, and two horizontal oblique pull modules. Columnar inserts are clamped and fixed from the top and bottom by the fixing parts of the front and rear molds; plate-shaped inserts are adsorbed and positioned by the air suction fixing parts on the side pull modules; and Z-shaped and cubic inserts are supported and pre-positioned by the support and misalignment locking parts on the rear mold. The fixing structures of each insert are independent and do not interfere with each other, simultaneously solving the problem of reliable pre-fixation of four different types of inserts within a single mold. Simultaneously, the middle section of the wing plate is formed by the closing of two horizontally opposing oblique pull modules, with its demolding direction consistent with the extension direction of the extension plate, solving the structural fit problem of multi-directional demolding. The support part ensures that the bottom surface of the staggered inserts forms a uniform glue position with the bottom surface of the cavity, ensuring that the resin can completely cover the inserts and avoiding insert displacement or exposed substrate defects caused by injection pressure. This invention achieves integrated injection molding of multiple types of inserts within a single mold.

[0026] Preferably, the sixth molding cavity wall 211 is provided with two spaced-apart pillars 2112, and the intersecting part of the two Z-shaped parts is located between the two pillars 2112; the side wall of the pillar 2112 and the side wall of the adjacent eighth molding cavity wall 213 both support protrusions 215, which are used to fit and fix with the recess corresponding to the cubic insert B4. The bottom of the side of the eighth forming cavity wall 213 is provided with supporting bosses 2131, which are used to support the ends of the two intersecting Z-shaped parts and cooperate with the two columns 2112 to form a misaligned locking part.

[0027] In specific implementation, such as Figure 8As shown, the sixth forming cavity wall 211 is provided with two spaced-apart pillars 2112, and the distance between the two pillars 2112 matches the width of the intersecting part of the two Z-shaped inserts; when assembling the inserts, the intersecting area of ​​the two Z-shaped inserts fits precisely between the two pillars 2112, limiting the Z-shaped inserts in the horizontal direction. The side walls of the column 2112 and the adjacent eighth forming cavity wall 213 are provided with supporting protrusions 215. The position and shape of the supporting protrusions 215 correspond to the recesses on the cube insert (not marked in the figure, but their shape is adapted to the supporting protrusions 215). When the cube insert B4 is placed, its recesses fit into the supporting protrusions, so that the cube insert is constrained in both the vertical and horizontal directions.

[0028] The bottom of the side of the eighth forming cavity wall 213 is provided with supporting bosses 2132. The two supporting bosses 2132 correspond to the bottom end surfaces of the two staggered Z-shaped inserts. When the Z-shaped inserts are placed, their two ends rest on the corresponding supporting bosses and cooperate with the two pillars 2112 to form a complete misalignment and locking system for the Z-shaped inserts and the cubic inserts.

[0029] In this embodiment, the cooperation between the column and the supporting boss simultaneously positions the intersecting Z-shaped inserts at multiple points in both the horizontal and vertical directions; the supporting protrusions on the sidewalls of the column and the eighth molding cavity engage with the recessed parts of the cubic inserts, further locking the cubic inserts in a predetermined position; the three form a mutually restrictive positioning network, ensuring that even during high-pressure injection molding, the inserts will not be displaced or deflected due to the impact of the material flow, thus guaranteeing the accuracy of the relative positions between the inserts and the uniformity of the resin filling gaps.

[0030] Preferably, the extension plate forming cavity 2111 of the front mold is located on one side of the eighth forming cavity wall 213, and the extension plate forming cavity 2111 is provided with a first limiting protrusion 21111 near the supporting boss 2131. The first limiting protrusion 21111 is used to limit the Z-shaped part together with the eighth forming cavity wall 213 during mold closing and injection molding.

[0031] In specific implementation, such as Figure 8 As shown, the extension plate forming cavity 2111 is located on one side of the eighth forming cavity wall 213. A first limiting protrusion 21111 is provided in the extension plate forming cavity 2111 near the supporting boss. The protrusion protrudes upward from the bottom surface of the extension plate forming cavity 2111 and its position is close to the edge of the Z-shaped insert extending to the extension plate area.

[0032] During injection molding, the clamping force of the corresponding surface of the front mold presses the Z-shaped insert between the first limiting protrusion 21111 and the side wall of the eighth molding cavity wall 213, and the two together limit the edge of the Z-shaped insert in this area.

[0033] In this embodiment, a first limiting protrusion is added to the forming area of ​​the extension plate to fill the positioning gap between the cavity of the extension plate and the Z-shaped insert, preventing the Z-shaped insert from shifting towards the cavity of the extension plate during injection molding, thus ensuring the forming accuracy of the extension plate area and the covering quality of the insert.

[0034] Preferably, the eighth molding cavity wall 213 is provided with a second limiting protrusion 2133 on the side near the third molding cavity wall 1341. The second limiting protrusion 2133 is used to limit the lower end of the plate-shaped insert B2 in the middle part together with the third molding cavity wall 1341 during mold closing injection.

[0035] In specific implementation, such as Figure 8 As shown, the eighth molding cavity wall 213 is provided with a second limiting protrusion 2132 on the side near the third molding cavity wall 1341; during assembly, the lower edge of the plate-shaped insert B2 located in the middle of the box-shaped body A1 abuts against the second limiting protrusion 2132; after the mold is closed, the second limiting protrusion 2132 and the third molding cavity wall 1341 on the first inclined pulling module 134 jointly clamp the lower end of the plate-shaped insert B2, forming a double-sided constraint on the lower edge of the plate-shaped insert.

[0036] In this embodiment, the second limiting protrusion 2132 cooperates with the third molding cavity wall 1341 to form a stable clamping structure at the lower edge of the plate-shaped insert B2, preventing the injection plastic flow from impacting the plate-shaped insert from below, causing it to move upward or tilt, and ensuring that the plate-shaped insert B2 maintains the correct posture and position in the cavity.

[0037] Preferably, the front mold is provided with a third oblique extraction module 136, the end of which extends to the upper end of the plate-shaped insert B2 located in the middle of the box-shaped body, and is used to limit the upper end of the plate-shaped insert B2 in the middle of the box-shaped body together with the third molding cavity wall 1341 during mold closing injection.

[0038] In specific implementation, such as Figure 3 , Figure 4 As shown, the front mold 1 is provided with a third inclined core-pulling module 136, which is connected to the front mold fixing plate. This module can pull the core along the vertical or inclined direction. During mold closing and injection molding, the end of the third inclined core-pulling module 136 extends downward to the upper edge of the plate-shaped insert located in the middle of the box-shaped body, and is positioned opposite to the third molding cavity wall 1341 on the first inclined core-pulling module 134. The two abut against the upper end of the plate-shaped insert from the upper and lower sides respectively, forming a double-sided constraint on the upper edge of the plate-shaped insert. During mold opening, the front mold fixing plate first drives the third inclined core-pulling module 136 to move upward, so that the end of the third inclined core-pulling module 136 releases the restriction on the upper end of the plate-shaped insert B2, ensuring normal mold opening.

[0039] In this embodiment, the third oblique pulling module cooperates with the third molding cavity wall to limit the upper end of the plate-shaped insert, forming a vertical pull-fixing structure with the second limiting protrusion at the lower end. This achieves full constraint on all four sides of the plate-shaped insert, completely eliminating displacement of the plate-shaped insert during injection molding.

[0040] In the above embodiments, the structures and working principles of the first, second, and third oblique extraction modules are all existing technologies and will not be described in detail here.

[0041] Preferably, the first molding cavity wall 132, the ninth molding cavity wall 214, the first insert fixing part 133 and the third insert fixing part 2141 are all provided on the detachable mold insert.

[0042] In specific implementation, the first molding cavity wall 132, the ninth molding cavity wall 214, the first insert fixing part 133, and the third insert fixing part 2141 are all set on the detachable mold insert; the insert is fixed to the corresponding mold core or template by screws or pressure plates, and a positioning pin or positioning key is provided between the insert and the mother body; since the product has strict requirements for the perpendicularity between the columnar insert and the wing plate, the detachable structure makes it easy to disassemble and repair the mold, so as to meet the perpendicularity requirements between the columnar insert and the wing plate.

[0043] Preferably, the upper end face of the eighth forming cavity wall 213 is provided with a chamfer 2132.

[0044] In specific implementation, such as Figure 8 As shown, the upper end face of the eighth molding cavity wall 213 is provided with a chamfer 2132. This chamfer is located at the junction edge of the eighth molding cavity wall 213 and the adjacent molding surface; it plays a guiding role in the mold closing and placement of Z-shaped inserts, reducing the risk of collision and damage to the corners of the molding cavity wall and extending the service life of the mold. At the same time, a chamfer structure is formed at the corresponding position on the inner wall of the box-shaped body, which is beneficial for subsequent assembly.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A molding die for multi-insert injection molded parts, characterized in that: This includes the front mold and the rear mold that work together; The bottom surface of the front mold is provided with a first molding cavity wall and two second molding cavity walls, and the two second molding cavity walls are spaced apart on both sides of the first molding cavity wall; the bottom surface of the front mold on both sides of the second molding cavity wall is provided with a first insert fixing part for fixing the columnar insert; The front mold is provided with a first inclined extraction module and a second inclined extraction module. The first inclined extraction module and the second inclined extraction module are arranged on both sides of the center line with the line connecting the first molding cavity wall and the second molding cavity wall as the center line. The first inclined extraction module and the second inclined extraction module open and close the mold in the horizontal direction. The first oblique extraction module is provided with a third molding cavity wall that is opposite to the first molding cavity wall and two fourth molding cavity walls, which are respectively located on both sides of the third molding cavity wall; both the third molding cavity wall and the fourth molding cavity wall are provided with a second insert fixing part for fixing the plate-shaped insert, and the second insert fixing part makes the plate-shaped insert form a glue position with the molding cavity wall; The second inclined drawing module has a fifth forming cavity wall at a position corresponding to the two fourth forming cavity walls; A sixth molding cavity wall is provided at the upper end of the rear mold corresponding to the first molding cavity wall, and a seventh molding cavity wall and an eighth molding cavity wall are opposite to the sixth molding cavity wall; the sixth molding cavity wall is provided with a support part and a misalignment locking part protruding from the bottom surface of the molding cavity, the support part is used to make the bottom surface of the staggered Z-shaped inserts and the cubic inserts filling the gaps between them form a glue position with the bottom surface of the molding cavity, and the misalignment locking part is used to pre-fix the staggered Z-shaped inserts and the cubic inserts; extension plate molding cavities for molding extension plates are also provided on both sides of the sixth molding cavity wall. The rear mold is provided with a ninth molding cavity wall at a position corresponding to the second molding cavity. The ninth molding cavity wall is provided with a third insert fixing part on both sides in the horizontal direction for cooperating with the first insert fixing part to fix the columnar insert. The first molding cavity wall, the third molding cavity wall, the sixth molding cavity wall, the seventh molding cavity wall, the eighth molding cavity wall, and the extension plate molding cavity are molded together to form the mold cavity of the box-shaped body and the extension plate; The fourth and fifth molding cavity walls are joined together to form the central mold cavity of the wing plate; The second molding cavity wall and the ninth molding cavity wall are joined together to form the end mold cavity of the wing plate.

2. The molding die for multi-insert injection molded parts according to claim 1, characterized in that: The sixth molding cavity wall is provided with two spaced-apart pillars, and the intersection of the two Z-shaped parts is located between the two pillars; the side walls of the pillars and the side walls of the adjacent eighth molding cavity wall are both supported by protrusions, which are used to fit and fix the recesses corresponding to the cubic inserts. The bottom of the side wall of the eighth forming cavity is provided with supporting bosses, which are used to support the ends of the two intersecting Z-shaped parts and cooperate with the two columns to form a misaligned locking part.

3. The molding die for multi-insert injection molded parts according to claim 2, characterized in that: The extension plate forming cavity of the front mold is located on one side of the eighth forming cavity wall, and the extension plate forming cavity is provided with a first limiting protrusion near the supporting boss. The first limiting protrusion is used to limit the Z-shaped part together with the eighth forming cavity wall during mold closing and injection molding.

4. The molding die for multi-insert injection molded parts according to any one of claims 1-3, characterized in that: The eighth molding cavity wall is provided with a second limiting protrusion on the side close to the third molding cavity wall. The second limiting protrusion is used to limit the lower end of the plate-shaped insert in the middle part together with the third molding cavity wall during mold closing and injection molding.

5. The molding die for multi-insert injection molded parts according to claim 4, characterized in that: The front mold is provided with a third oblique extraction module. The end of the third oblique extraction module extends to the upper end of the plate-shaped insert located in the middle of the box-shaped body. It is used to limit the upper end of the plate-shaped insert in the middle of the box-shaped body together with the third molding cavity wall during mold closing and injection molding.

6. The molding die for multi-insert injection molded parts according to claim 1, characterized in that: The second insert fixing part is an adsorption fixing structure.

7. The molding die for multi-insert injection molded parts according to claim 1, characterized in that: The second molding cavity wall, the ninth molding cavity wall, the first insert fixing part and the third insert fixing part are all provided on the detachable mold insert.

8. The molding die for multi-insert injection molded parts according to claim 1, characterized in that: The upper end face of the eighth forming cavity wall is chamfered.

Images