Insert structure for integral injection molding of hardware and injection mold

Abstract

The utility model discloses an insert structure and an injection mold for carrying out integral injection molding on hardware, the insert structure comprises a mold core assembly and an insert mechanism, the mold core assembly is provided with an upper mold core and a lower mold core, and a cavity for carrying out injection molding production on a plastic product is formed between the upper mold core and the lower mold core; the insert mechanism is movably connected to the mold core assembly and matched with the mold core assembly to jointly define a complete injection molding cavity. The insert mechanism is provided with a first insert, the first insert is encircled to form a first side wall of the injection molding cavity and is fixedly connected with hardware, and the hardware penetrates into the injection molding cavity, so that the hardware is integrally injected into the plastic product. In conclusion, the hardware in the injection molding cavity can be supported and positioned, the preset position of the hardware can be kept unchanged in the injection molding process, and the quality of injection molding products is further improved.

Description

Technical Field

[0001] This utility model relates to the technical field of insert design in injection molds, and in particular to an insert structure and injection mold for integral injection molding of hardware parts. Background Technology

[0002] A typical metal injection mold consists of an upper mold, a lower mold, ejector pins, and a slider. During production, the metal part is placed into the mold cavity, the upper and lower molds are then closed, and plastic is injected into the mold cavity to form the injection-molded product. Molds are one of the commonly used pieces of equipment for injection molding parts, allowing for rapid mass production.

[0003] Chinese patent document CN220373775U discloses an injection mold for molding in-mold inserts, including a front mold core and a rear mold core, which form an injection cavity for molding an injection molded part. The rear mold core also has a rear mold core through hole for placing hardware, which is connected to the injection cavity. During molding, one end of the hardware is placed in the injection cavity to be enclosed in the injection molded part, and the other end of the hardware is located in the rear mold core through hole, which is the end exposed in the injection molded part. The front mold core has a front mold core through hole that is connected to the injection cavity, and a movable front mold ejector pin is provided in the front mold core through hole. The front mold ejector pin is used to hold the hardware during injection molding.

[0004] As disclosed in the aforementioned document, to prevent the hardware from shifting inside the injection molding cavity and causing the injection molded product to fail, it is necessary to support and position the hardware. The solution adopted in the document is for specific products where a section of the hardware can protrude from the injection molding cavity; for products where the hardware is not protruding, positioning is more difficult.

[0005] Therefore, how to simplify the support and positioning of hardware parts in the injection molding cavity so that they can maintain their preset positions during the injection molding process is a technical problem that needs to be solved. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0007] This utility model provides an insert structure for integral injection molding of hardware parts, including a mold core assembly and an insert mechanism. The mold core assembly has an upper mold core and a lower mold core, and a cavity for injection molding of plastic products is formed between the upper mold core and the lower mold core. The insert mechanism is movably connected to the mold core assembly and cooperates with the mold core assembly to jointly form a complete injection molding cavity. The insert mechanism has a first insert, which surrounds and forms a first sidewall of the injection molding cavity and fixes the hardware parts thereto, allowing the hardware parts to penetrate into the injection molding cavity and be integrally injection molded into the interior of the plastic product.

[0008] As a further embodiment of this utility model: the first insert is provided with a positioning bolt, the hardware is provided with a reinforcing support, the end of the reinforcing support is exposed on the outer wall of the plastic product, so that the countersunk hole inside the reinforcing support is also exposed on the plastic product; the positioning bolt can be pulled out and inserted into the countersunk hole, so that when the mold is closed, the hardware is supported and positioned at a preset position in the injection cavity.

[0009] As a further embodiment of this utility model: the positioning bolt is provided with a first bolt and a second bolt, the reinforcing support is provided with a first support and a second support, the first bolt can be pulled out and inserted into the countersunk hole of the first support; the second bolt can be pulled out and inserted into the countersunk hole of the second support.

[0010] As a further embodiment of this utility model: the lower part of the first insert is provided with a trapezoidal protrusion, and the insert mechanism is also provided with a second insert. The second insert is movably connected to the lower mold core and surrounds to form the second sidewall of the injection cavity; the upper part of the second insert is provided with a trapezoidal groove corresponding to the trapezoidal protrusion. When the mold is closed, the trapezoidal protrusion and the trapezoidal groove cooperate with each other, so that the first insert and the second insert abut against each other and surround to form the injection cavity.

[0011] As a further embodiment of this utility model: the insert mechanism is further provided with a third insert, the third insert being slidably connected to the lower mold core and forming the third sidewall of the injection cavity; the upper part of the third insert is provided with an oblique guide hole, and the upper mold core is provided with an oblique guide post corresponding to the oblique guide hole, the oblique guide hole and the oblique guide post cooperating with each other, so that the upper mold core can drive the third insert to slide laterally along the lower mold core.

[0012] As a further embodiment of this utility model: the insert mechanism is further provided with a fourth insert, the fourth insert being slidably connected to the lower mold core and forming the fourth sidewall of the injection cavity; the upper part of the fourth insert is provided with an oblique guide hole, and the upper mold core is provided with an oblique guide post at the position corresponding to the oblique guide hole, the oblique guide hole and the oblique guide post cooperating with each other, so that the upper mold core can drive the fourth insert to slide laterally along the lower mold core.

[0013] This utility model also provides an injection mold, including the above-mentioned insert structure for integral injection molding of hardware parts, and further including a mold frame system, a gating system, a cooling system and an ejection system.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. By setting a positioning bolt in the first insert, the countersunk hole of the reinforcing support on the hardware can be used to fit the positioning bolt. When the first insert is closed to form the injection cavity, the hardware can be placed inside the injection cavity, and at the same time, it can be supported and positioned, avoiding the risk of displacement of the hardware during the injection process.

[0016] 2. To improve the support and positioning of the hardware, a first bolt and a second bolt can be installed to connect the hardware from both ends, so that it can maintain a preset position inside the injection cavity, thereby further improving the quality of the injection molded product.

[0017] 3. Furthermore, the trapezoidal groove of the second insert cooperates with the trapezoidal protrusion of the first insert to better fix the first insert inside the insert structure, so that it can accurately form the side wall of the injection molding cavity.

[0018] Therefore, with the above improvements, this utility model can provide an insert structure and injection mold for integral injection molding of hardware parts, which can support and position the hardware parts in the injection cavity, so that the preset position can be maintained during the injection process, thereby further improving the quality of injection molded products.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 This is a schematic diagram of the mold core assembly of this utility model;

[0022] Figure 2 This is a structural schematic diagram of the plastic product of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the first insert of this utility model;

[0024] Figure 4 This is a schematic diagram of the separation structure of the second insert of this utility model;

[0025] Figure 5 This is a structural schematic diagram of the reinforced support column of this utility model;

[0026] Figure 6 This is a structural schematic diagram of the hardware component of this utility model.

[0027] The reference numerals and names in the figures are as follows:

[0028] 10 Mold core assembly; 11 Lower mold core; 20 Insert mechanism; 21 First insert; 22 Trapezoidal protrusion; 23 Positioning bolt; 24 First bolt; 25 Second bolt; 30 Second insert; 31 Trapezoidal groove; 32 Third insert; 33 Angled guide hole; 34 Fourth insert; 41 Plastic product; 42 Hardware; 43 Reinforcing support; 44 First support; 45 Second support. Detailed Implementation

[0029] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] See also Figures 1 to 6 In this embodiment of the present invention, an insert structure for integral injection molding of hardware includes a mold core assembly 10 and an insert mechanism 20. The mold core assembly 10 is provided with an upper mold core and a lower mold core 11, and a cavity for injection molding of a plastic product 41 is formed between the upper mold core and the lower mold core 11. The insert mechanism 20 is movably connected to the mold core assembly 10 and cooperates with the mold core assembly 10 to jointly form a complete injection molding cavity. The insert mechanism 20 is provided with a first insert 21, which forms a first sidewall of the injection molding cavity and is fixedly connected to a hardware component 42, allowing the hardware component 42 to penetrate into the injection molding cavity and be integrally injection molded into the interior of the plastic product 41.

[0031] Specifically, since the hardware component 42 needs to be injection molded into the plastic product 41, it cannot be supported or positioned externally. Instead, it can only be supported or positioned by inserts that form the injection cavity. Since the insert itself is part of the sidewall that surrounds the injection cavity, the side facing the injection cavity can be used to support and position the hardware component 42.

[0032] Secondly, this utility model also provides an injection mold, including a mold base system, a gating system, a cooling system, and an ejection system. To form the injection cavity, the upper mold core and lower mold core 11 need to cooperate, so that they can close to form a sealed injection space when the mold is closed. The gating system pours the corresponding molten liquid into the injection space, and after cooling by the cooling system, the plastic product 41 is formed. The upper mold core and lower mold core 11 can be connected to the mold base system and follow it during mold opening and closing operations. The ejection system ejects the cooled plastic product 41, making the injection cavity usable for the next injection operation.

[0033] like Figures 2 to 6 As shown, preferably, the first insert 21 is provided with a positioning bolt 23, and the hardware 42 is provided with a reinforcing support 43. The end of the reinforcing support 43 protrudes from the outer wall of the plastic product 41, so that the countersunk hole inside the reinforcing support 43 is also exposed to the plastic product 41. The positioning bolt 23 can be pulled out and inserted into the countersunk hole, so that when the mold is closed, the hardware 42 is supported and positioned at a preset position in the injection cavity. The positioning bolt 23 is provided with a first bolt 24 and a second bolt 25, and the reinforcing support 43 is provided with a first support 44 and a second support 45. The first bolt 24 can be pulled out and inserted into the countersunk hole of the first support 44; the second bolt 25 can be pulled out and inserted into the countersunk hole of the second support 45.

[0034] Specifically, to support or position the hardware 42, positioning bolts 23 can be installed at appropriate positions on the first insert 21. Using the reinforcing supports 43 on the hardware 42, the positioning bolts 23 are inserted into the countersunk holes of the reinforcing supports 43, allowing the hardware 42 to be placed on the first insert 21. During mold closing, the first insert 21 places the hardware 42 into the injection cavity, forming the corresponding injection position. Furthermore, to improve the stability of the hardware 42, multiple positioning bolts 23 can be used to simultaneously support and position multiple parts of the hardware 42. Preferably, support and positioning are performed on the reinforcing supports 43 at both ends of the hardware 42, resulting in more accurate injection positioning of the hardware 42.

[0035] Secondly, since the positioning bolt 23 is inserted into the reinforcing support column 43, a corresponding mold opening mechanism (not shown in the figure) can be set up during mold opening to first withdraw the positioning bolt 23 in the first insert 21 a certain distance away from the reinforcing support column 43 of the hardware 42, and then the mold opening of the first insert 21 can be performed. The mold opening mechanism can adopt existing structures in the prior art, such as the cooperation and movement mechanism of the inclined guide hole 33 and the inclined guide column, or the cooperation and movement mechanism of the inclined protrusion, or the cooperation and movement mechanism of the transverse cylinder, etc.

[0036] like Figure 4 As shown, preferably, the lower part of the first insert 21 is provided with a trapezoidal protrusion 22, and the insert mechanism 20 is also provided with a second insert 30. The second insert 30 is movably connected to the lower mold core 11 and surrounds to form the second sidewall of the injection cavity. The upper part of the second insert 30 is provided with a trapezoidal groove 31 corresponding to the trapezoidal protrusion 22. When the mold is closed, the trapezoidal protrusion 22 and the trapezoidal groove 31 cooperate with each other, so that the first insert 21 and the second insert 30 abut against each other and surround to form the injection cavity.

[0037] Specifically, to form the second sidewall of the injection cavity, i.e., the downward-facing sidewall, a second insert 30 can be provided. The vertical movement of the second insert 30 during mold closing or opening can assist in positioning the first insert 21, making its position more precise. That is, the trapezoidal groove 31 can be used to vertically drive the trapezoidal protrusion 22, allowing the first insert 21 to move a certain distance laterally, thereby maintaining the corresponding injection position.

[0038] like Figure 2 and Figure 4 As shown, preferably, the insert mechanism 20 is further provided with a third insert 32, which is slidably connected to the lower mold core 11 and surrounds to form the third sidewall of the injection cavity; the upper part of the third insert 32 is provided with an oblique guide hole 33, and the upper mold core is provided with an oblique guide post corresponding to the oblique guide hole 33. The oblique guide hole 33 and the oblique guide post cooperate with each other so that the upper mold core can drive the third insert 32 to slide laterally along the lower mold core 11.

[0039] Specifically, during mold closing, the inclined guide post of the upper mold core, in conjunction with the inclined guide hole 33, moves the third insert 32 inward, thereby forming the injection cavity. During mold opening, the inclined guide post of the upper mold core drives the inclined guide hole 33 to move the third insert 32 outward, thereby allowing the plastic product 41 to be removed.

[0040] like Figure 1 As shown, preferably, the insert mechanism 20 is further provided with a fourth insert 34, which is slidably connected to the lower mold core 11 and surrounds to form the fourth sidewall of the injection cavity; the upper part of the fourth insert 34 is provided with an oblique guide hole 33, and the upper mold core is provided with an oblique guide post corresponding to the oblique guide hole 33. The oblique guide hole 33 and the oblique guide post cooperate with each other so that the upper mold core can drive the fourth insert 34 to slide laterally along the lower mold core 11.

[0041] Specifically, similarly, during mold closing, the inclined guide post of the upper mold core, in conjunction with the inclined guide hole 33, moves the fourth insert 34 inward, thereby forming the injection cavity. During mold opening, the inclined guide post of the upper mold core drives the inclined guide hole 33 to move the fourth insert 34 outward, thereby allowing the plastic product 41 to be removed.

[0042] In use, the injection mold with the insert structure is installed on the corresponding injection molding mechanism, enabling it to perform the corresponding mold opening and closing operations. The hardware part 42 is placed onto the positioning bolt 23 of the first insert 21 by manual or robotic operation, followed by mold closing, placing the hardware part 42 into the preset position of the injection cavity. Then, the injection cavity is poured, injecting molten liquid into the cavity.

[0043] After cooling, an injection-molded product encapsulating the metal parts 42 is formed, which can then be molded. During mold opening, the corresponding inserts, driven by the mold base system, can move laterally or vertically, thus leaving the injection cavity and allowing the plastic product 41 to be ejected.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An insert structure for integrally injecting a hardware component, characterized in that: The invention comprises a mold core assembly (10) and an insert mechanism (20), wherein the mold core assembly (10) is provided with an upper mold core and a lower mold core (11), and a cavity for injection molding a plastic product (41) is formed between the upper mold core and the lower mold core (11); the insert mechanism (20) is movably connected to the mold core assembly (10), and cooperates with the mold core assembly (10) to jointly form a complete injection molding cavity; the insert mechanism (20) is provided with a first insert (21), and the first insert (21) is combined to form a first side wall of the injection molding cavity, and is fixedly connected with a hardware (42), and the hardware (42) is allowed to penetrate into the injection molding cavity, so that it is integrally injection molded into the interior of the plastic product (41).

2. The insert structure for integrally injecting a hardware component according to claim 1, characterized in that: The first insert (21) is provided with a positioning bolt (23), and the hardware (42) is provided with a reinforcing support (43), the end of the reinforcing support (43) is exposed from the outer wall of the plastic product (41), so that the countersunk hole inside the reinforcing support (43) is also exposed from the plastic product (41); the positioning bolt (23) can be pulled out and inserted into the countersunk hole, so that when the mold is closed, the hardware (42) is supported and positioned at a preset position in the injection molding cavity.

3. The insert structure for integrally injecting a hardware component according to claim 2, characterized in that: The positioning bolt (23) is provided with a first bolt (24) and a second bolt (25), and the reinforcing support (43) is provided with a first support (44) and a second support (45). The first bolt (24) can be pulled out and inserted into the countersunk hole of the first support (44); and the second bolt (25) can be pulled out and inserted into the countersunk hole of the second support (45).

4. The insert structure for integrally injecting a hardware component according to claim 2, characterized in that: The lower part of the first insert (21) is provided with a trapezoidal protrusion (22), and the insert mechanism (20) is also provided with a second insert (30), the second insert (30) is movably connected to the lower mold core (11), and together form a second side wall of the injection molding cavity; the second insert (30) is provided with a trapezoidal groove (31) corresponding to the upper part of the trapezoidal protrusion (22), when the mold is closed, the trapezoidal protrusion (22) and the trapezoidal groove (31) cooperate with each other, so that the first insert (21) and the second insert (30) abut against each other, and together form the injection molding cavity.

5. The insert structure for integrally injecting a hardware component according to claim 1, characterized in that: The insert mechanism (20) is also provided with a third insert (32), and the third insert (32) is slidably connected to the lower mold core (11) and encloses and forms a third side wall of the injection cavity; an inclined guide hole (33) is provided on the upper part of the third insert (32), and an inclined guide column is provided at a position of the upper mold core corresponding to the inclined guide hole (33). The inclined guide hole (33) and the inclined guide column cooperate with each other, so that the upper mold core can drive the third insert (32) to slide laterally along the lower mold core (11).

6. The insert structure for integrally injecting a hardware component according to claim 5, characterized in that: The insert mechanism (20) is also provided with a fourth insert (34), which is slidably connected to the lower mold core (11) and encloses and forms a fourth side wall of the injection cavity; an inclined guide hole (33) is provided on the upper part of the fourth insert (34), and an inclined guide column is provided at a position of the upper mold core corresponding to the inclined guide hole (33). The inclined guide hole (33) and the inclined guide column cooperate with each other, so that the upper mold core can drive the fourth insert (34) to slide laterally along the lower mold core (11).

7. An injection mold, characterized in that: The invention comprises an insert structure for integrally injecting a hardware part as claimed in any one of claims 1 to 6, and also comprises a mold frame system, a casting system, a cooling system and an ejection system.

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