Injection mold with PIN circumferential alignment structure

Abstract

The utility model discloses an injection mold with a PIN circumferential alignment structure, which comprises a mold frame assembly, a mold core assembly, an ejection assembly, a pouring system and a cooling system, a cavity of an injection product is formed in the mold core assembly, the pouring system is used for injecting plastic heat flow into the cavity, and the cooling system is used for cooling the injection product. The cooling system is used for cooling a product formed in the mold core assembly and the mold cavity, and the ejection assembly is used for ejecting the product out after the mold frame assembly and the mold core assembly are separated, so that the product is separated from the mold core assembly; a cavity is formed in the mold core assembly, prefabricated PINs are placed in the cavity, the mold core assembly is provided with a guide structure, and the guide structure is fixedly connected to the mold core assembly and forms limiting connection with the prefabricated PINs which are placed in advance. In conclusion, in the injection molding process, the PINs can be guided, so that the pin tails of the PINs are prevented from being pressed and deformed, the situation of defective products is avoided, and the production benefit is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds containing PIN needles, in particular to an injection mold with a PIN needle circumferential guide structure. Background Art

[0002] With the increasing popularity of portable electronic products such as mobile phones, the market for chargers for electronic products is also growing, especially the demand for chargers with fast charging capabilities. To achieve fast charging, it is usually achieved by increasing the voltage or charging current, which accordingly places higher requirements on the conductive PINs in the charger and their connection methods.

[0003] Usually, the charger needs to be equipped with a conductive PIN to connect to an external socket for charging, and the charger with a PIN is usually produced by injection molding. During the injection molding process, the pin in the mold presses the PIN to the corresponding position, and then the injection molding is performed through the gating system to form the corresponding workpiece. After the workpiece is formed, it can wrap the PIN, so that the conductive PIN can be firmly connected to the charger shell.

[0004] For example, a Chinese patent document with the announcement number CN220499750U discloses a PIN pin holding structure and an injection mold. The above-mentioned PIN pin holding structure and injection mold include a front mold, a rear mold assembly and a holding assembly. The rear mold assembly includes a rear mold and a fixed plate. The other side of the rear mold is provided with a mounting groove. The fixed plate is installed in the mounting groove. A movable groove is also provided in the mounting groove. The rear mold is also provided with a movable hole. The movable hole is connected to the movable groove. The holding assembly includes an insert pin and an elastic member. The elastic member is installed in the movable groove. One end of the elastic member abuts against the fixed plate. The other end of the elastic member abuts against one end of the insert pin. The main body of the insert pin is respectively inserted into the movable hole. A groove is provided on the surface of the other end of the insert pin. The deformation of the elastic member pushes the insert pin to abut against the PIN pin, so that the insert pin maintains a suitable thrust on the PIN pin, so that the end face of the PIN pin will not be crushed.

[0005] Although the above patent solves the problem of burrs easily generated around the outer edge of the end face of the PIN pin at the injection molding connection, the PIN pin may tilt when the mold is closed, resulting in the inlay pin failing to limit the PIN pin well, which can easily result in defective products after the injection molding is completed.

[0006] Especially in high-current chargers, the needle tail of the PIN pin is relatively large and needs to protrude outside the injection-molded shell to facilitate the subsequent connection of the corresponding conductive circuit. Therefore, it is necessary to ensure that the needle tail is not pressed by the inlaid pin to avoid deformation of the needle tail.

[0007] Therefore, the technical problem encountered is how to guide the PIN needle when the injection mold is closed, so as to prevent the needle tail of the PIN needle from being deformed by the top pressure. Utility Model Content

[0008] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0009] The utility model provides an injection mold with a PIN pin circumferential guiding structure, comprising a mold frame component, a mold core component, an ejector component, a pouring system and a cooling system, wherein a cavity of an injection molded product is formed inside the mold core component, the pouring system is used to inject a plastic heat flow into the cavity, the cooling system is used to cool the mold core component and the product formed in the cavity, and the ejector component is used to eject the product after the mold frame component and the mold core component are separated, so as to separate the product from the mold core component; a prefabricated PIN pin is placed in the cavity, the mold core component is provided with a guiding structure, the guiding structure is fixedly connected to the mold core component, and forms a limit connection for the prefabricated PIN pin placed in advance.

[0010] As a further solution of the utility model: the guiding structure is provided with a guiding pin, one end of which is fixedly connected to the mold core assembly, and the other end of which extends into the mold cavity and abuts against the prefabricated PIN pin.

[0011] As a further solution of the utility model: a limiting nut is provided at one end of the guide pin fixedly connected to the mold core assembly, a limiting countersunk hole is provided on the upper mold core of the mold core assembly, and the limiting nut and the limiting countersunk hole cooperate with each other to form a fixed connection.

[0012] As a further solution of the utility model: one end of the guide pin extending into the cavity is provided with a receiving countersunk hole, and one end of the prefabricated PIN pin extending into the cavity is provided with a needle tail, and after the injection mold is closed, the needle tail is received in the receiving countersunk hole.

[0013] As a further solution of the utility model: the accommodating countersunk hole is provided with a guide chamfer, and the guide chamfer has a certain inclination, so as to form a slope inclined toward the bottom of the accommodating countersunk hole, thereby guiding the needle tail to smoothly enter the accommodating countersunk hole when the mold is closed.

[0014] As a further solution of the utility model: the lower mold core of the mold core assembly is provided with a reserved through hole, and the reserved through hole is used to place the prefabricated PIN needle and allow the needle tail of the prefabricated PIN needle to extend into the mold cavity.

[0015] As a further solution of the utility model: the mold frame assembly is provided with an upper mold frame and a lower mold frame, the upper mold core of the mold core assembly is fixedly connected to the upper mold frame, and the lower mold core is fixedly connected to the lower mold frame.

[0016] As a further solution of the utility model: the ejection assembly is provided with an ejector plate, a product ejector and a needle ejector, the product ejector and the needle ejector are respectively fixed to the ejector plate, the ejector plate is movably connected to the lower mold frame, one end of the needle ejector is fixed to the ejector plate, and the other end thereof penetrates into the reserved through hole and abuts against the prefabricated PIN pin.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. By setting the corresponding guiding structure in the mold core assembly, a limit connection is formed for the pre-placed prefabricated PIN needle to ensure that the PIN needle will not tilt and avoid defective products.

[0019] 2. A receiving countersunk hole is provided on the guide pin so that the tail of the PIN pin can be received in the receiving countersunk hole, thereby preventing the tail of the pin from being affected during the injection molding process and avoiding problems in subsequent connection of the wire.

[0020] 3. A slope is also set at the opening of the countersunk hole so that when the mold is closed, the needle tail of the PIN needle can pass through the slope more smoothly into the countersunk hole, further preventing the risk of pressing the needle tail.

[0021] Therefore, after the above-mentioned improvements, the utility model can provide an injection mold with a PIN needle circumferential guiding structure, so that during the injection molding process, the PIN needle can be guided, thereby preventing the needle tail of the PIN needle from being pressed and deformed, avoiding the occurrence of defective products, and thus improving production efficiency.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a structural schematic diagram of the guiding structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the accommodating countersunk hole of the utility model;

[0026] Figure 3 It is a structural schematic diagram of the guide ramp of the utility model;

[0027] Figure 4 It is a schematic structural diagram of the guide pin of the utility model abutting against the prefabricated PIN pin;

[0028] Figure 5 It is a schematic diagram of the structure in which the guide pin and the prefabricated PIN pin of the utility model are separated;

[0029] Figure 6 It is a structural schematic diagram of the mold core assembly of the utility model;

[0030] Figure 7 It is a schematic diagram of the structure of the product ejector and needle ejector of the utility model;

[0031] Figure 8 It is a structural schematic diagram of the ejector plate of the utility model;

[0032] Fig. 9 It is a schematic diagram of the overall structure of the injection mold of the utility model.

[0033] The reference numerals and names in the figures are as follows:

[0034] 10 bottom plate; 11 square iron; 12 top plate; 13 pouring system; 14 cooling system; 20 mold frame assembly; 21 upper mold frame; 22 lower mold frame; 30 mold core assembly; 31 cavity; 32 upper mold core; 33 limiting countersunk hole; 34 lower mold core; 35 reserved through hole; 40 ejector assembly; 41 ejector plate; 42 product ejector; 43 needle ejector; 50 guide structure; 51 guide pin; 52 limiting nut; 53 accommodating countersunk hole; 54 guide ramp; 60 prefabricated PIN needle; 61 needle tail; 62 product. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 9In an embodiment of the utility model, an injection mold with a PIN pin circumferential guiding structure includes a mold frame assembly 20, a mold core assembly 30, an ejector assembly 40, a pouring system 13 and a cooling system 14. A cavity 31 for an injection molded product 62 is formed inside the mold core assembly 30. The pouring system 13 is used to inject plastic heat flow into the cavity 31. The cooling system 14 is used to cool the mold core assembly 30 and the product 62 formed in the cavity 31. The ejector assembly 40 is used to eject the product 62 after the mold frame assembly 20 and the mold core assembly 30 are separated, so that the product 62 is separated from the mold core assembly 30; a prefabricated PIN pin 60 is placed in the cavity 31, and the mold core assembly 30 is provided with a guiding structure 50. The guiding structure 50 is fixed to the mold core assembly 30 and forms a limiting connection for the prefabricated PIN pin 60 placed in advance.

[0037] Specifically, the injection mold can also be provided with a corresponding bottom plate 10, a square iron 11 and a top plate 12, wherein the square iron 11 and the bottom plate 10 are fixedly connected to each other, and the lower mold frame 22 of the mold frame assembly 20 is fixedly connected to the square iron 11. The ejector assembly 40 is movably connected to the bottom plate 10 through corresponding guide pillars. The top plate 12 is fixedly connected to the upper mold frame 21 of the mold frame assembly 20, thereby driving the upper mold frame 21 to close or open the mold, and the corresponding pouring system 13 is fixedly connected to the inside of the top plate 12, pouring the corresponding injection mold into the cavity 31 formed inside the mold core assembly 30. The upper mold frame 21 and the top plate 12 are also correspondingly slidably connected with the lower mold frame 22, the bottom plate 10 and the square iron 11 through the corresponding guide system, and the guide pillars of the guide system are used for guidance, thereby improving the mold closing accuracy.

[0038] Secondly, the upper mold core 32 of the mold core assembly 30 is fixed to the upper mold frame 21, and the lower mold core 34 is fixed to the lower mold frame 22. Accordingly, when the mold is closed or opened, the upper mold core 32 moves with the upper mold frame 21, and the lower mold core 34 moves with the lower mold frame 22. The cooling system 14 is installed inside the mold core assembly 30 to cool the mold core and the injection molded product 62.

[0039] Thirdly, since the prefabricated PIN needle 60 needs to be placed in the cavity 31 formed inside the mold core assembly 30, during the mold closing process, the corresponding guide structure 50 can abut against the prefabricated PIN needle 60, thereby forming a limiting effect, so that the prefabricated PIN needle 60 can be accurately maintained at a predetermined position in the cavity 31. At the same time, a corresponding receiving countersunk hole 53 is also provided on the guide pin 51, so that the needle tail 61 of the prefabricated PIN needle 60 can be accommodated inside the receiving countersunk hole 53, which can protect the needle tail 61 during the injection molding process. It can also continuously maintain the position and state of the prefabricated PIN needle 60 without changing, avoiding the occurrence of defective products.

[0040] Finally, during the mold closing process, when the needle tail 61 contacts the guide pin 51, in order to allow the needle tail 61 to enter the accommodating countersunk hole 53 more smoothly, a guide slope 54 can be provided at the opening of the accommodating countersunk hole 53, so that during the mold closing process, even if the concentricity is insufficient, the needle tail 61 can be smoothly received into the accommodating countersunk hole 53, thereby avoiding the situation where the needle tail 61 is pressed, thereby reducing the risk of defective products.

[0041] like Figure 1 and Figure 6 As shown, preferably, the guiding structure 50 is provided with a guiding pin 51, one end of which is fixedly connected to the mold core assembly 30, and the other end thereof extends into the mold cavity 31 and abuts against the prefabricated PIN pin 60. A limiting nut 52 is provided at one end of the guiding pin 51 fixedly connected to the mold core assembly 30, and a limiting countersunk hole 33 is provided on the upper mold core 32 of the mold core assembly 30, and the limiting nut 52 and the limiting countersunk hole 33 cooperate with each other to form a fixed connection.

[0042] Specifically, the guide pin 51 is preferably fixed to the upper mold core 32, and can be fixed accordingly by the way that the limiting countersunk hole 33 of the upper mold core 32 and the limiting nut 52 of the guide pin 51 are docked and matched with each other. It can be understood that the guide pin 51 can also be replaced, and can be replaced according to the different prefabricated PIN pins 60 used in the product 62 to be produced. Therefore, the matching connection method of the limiting countersunk hole 33 can facilitate replacement.

[0043] like Figures 2 to 6 As shown, preferably, one end of the guide pin 51 extending into the cavity 31 is provided with a receiving countersunk hole 53, and one end of the prefabricated PIN pin 60 extending into the cavity 31 is provided with a pin tail 61. After the injection mold is closed, the pin tail 61 is received in the receiving countersunk hole 53. The receiving countersunk hole 53 is provided with a guide chamfer, and the guide chamfer has a certain inclination, thereby forming a slope inclined toward the bottom of the receiving countersunk hole 53, thereby guiding the pin tail 61 to smoothly enter the receiving countersunk hole 53 when the mold is closed.

[0044] Specifically, a corresponding receiving countersunk hole 53 may be provided on the guide pin 51, so that the needle tail 61 of the prefabricated PIN pin 60 can be received inside the receiving countersunk hole 53, and the needle tail 61 can be protected during the injection molding process. In order to allow the needle tail 61 to enter the receiving countersunk hole 53 more smoothly, a guide slope 54 may be provided at the opening of the receiving countersunk hole 53, so that during the mold closing process, even if there is a certain deviation in concentricity, the needle tail 61 can be smoothly received into the receiving countersunk hole 53, which can not only form a limit effect on the prefabricated PIN pin 60, but also avoid the situation of pressing the needle tail 61, thereby reducing the risk of defective products.

[0045] like Figure 6 and Figure 7 As shown, preferably, the lower mold core 34 of the mold core assembly 30 is provided with a reserved through hole 35, and the reserved through hole 35 is used to place the prefabricated PIN needle 60, and the needle tail 61 of the prefabricated PIN needle 60 extends into the mold cavity 31. The ejector assembly 40 is provided with an ejector plate 41, a product ejector 42 and a needle ejector 43, the product ejector 42 and the needle ejector 43 are respectively fixed to the ejector plate 41, the ejector plate 41 is movably connected to the lower mold frame 22, one end of the needle ejector 43 is fixed to the ejector plate 41, and the other end thereof penetrates the reserved through hole 35 and abuts against the prefabricated PIN needle 60.

[0046] Specifically, in order to accommodate the prefabricated PIN needle 60, a corresponding reserved through hole 35 can be provided in the lower mold core 34, and the prefabricated PIN needle 60 can be placed inside the reserved through hole 35 before the mold is closed. When the mold is opened, in order to avoid deformation between the prefabricated PIN needle 60 and the product 62, a corresponding needle ejector 43 needs to be provided in the reserved through hole 35, and the ejector assembly 40 can be used to eject the needle ejector 43, so as to eject the prefabricated PIN needle 60. It can be understood that a corresponding product ejector 42 can also be provided at a suitable position of the corresponding product 62, so that the product 62 can be ejected synchronously when the mold is opened.

[0047] like Figure 8 and Fig. 9 As shown, preferably, the mold frame assembly 20 is provided with an upper mold frame 21 and a lower mold frame 22 , the upper mold core 32 of the mold core assembly 30 is fixedly connected to the upper mold frame 21 , and the lower mold core 34 thereof is fixedly connected to the lower mold frame 22 .

[0048] Specifically, in order to enable the mold core assembly 30 to perform mold closing and mold opening normally, it is also necessary to set up a corresponding upper mold frame 21 and a lower mold frame 22, so that the top plate 12 and the bottom plate 10 are respectively connected to the upper mold frame 21 and the lower mold frame 22, and driven by external existing machinery and equipment to achieve mold closing and mold opening, so as to perform normal injection molding production operations.

[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. An injection mold with a PIN pin circumferential guide structure, comprising a mold frame assembly (20), a mold core assembly (30), an ejector assembly (40), a pouring system (13) and a cooling system (14), characterized in that: A cavity (31) for a molded product (62) is formed inside the mold core assembly (30); the pouring system (13) is used to inject a plastic heat flow into the cavity (31); the cooling system (14) is used to cool the mold core assembly (30) and the product (62) formed in the cavity (31); the ejection assembly (40) is used to eject the product (62) after the mold frame assembly (20) and the mold core assembly (30) are separated, so as to separate the product (62) from the mold core assembly (30); a prefabricated PIN pin (60) is placed in the cavity (31); the mold core assembly (30) is provided with a guiding structure (50); the guiding structure (50) is fixedly connected to the mold core assembly (30) and forms a limiting connection with the prefabricated PIN pin (60) placed in advance.

2. The injection mold with a PIN pin circumferential alignment structure according to claim 1, characterized in that: The guiding structure (50) is provided with a guiding pin (51), one end of which is fixedly connected to the mold core assembly (30), and the other end of which extends into the mold cavity (31) and abuts against the prefabricated PIN pin (60).

3. The injection mold with a PIN circumferential alignment structure according to claim 2, characterized in that: The guide pin (51) is fixedly connected to one end of the mold core assembly (30) and is provided with a limiting nut (52). The upper mold core (32) of the mold core assembly (30) is provided with a limiting countersunk hole (33). The limiting nut (52) and the limiting countersunk hole (33) cooperate with each other to form a fixed connection.

4. The injection mold with a PIN pin circumferential alignment structure according to claim 2, characterized in that: One end of the guide pin (51) extending into the mold cavity (31) is provided with a receiving countersunk hole (53), and one end of the prefabricated PIN pin (60) extending into the mold cavity (31) is provided with a needle tail (61). After the injection mold is closed, the needle tail (61) is received in the receiving countersunk hole (53).

5. The injection mold with a PIN circumferential guide structure according to claim 4, characterized in that: The receiving counterbore (53) is provided with a guide chamfer having a certain inclination, thereby forming a slope inclined toward the bottom of the receiving counterbore (53), thereby guiding the needle tail (61) to smoothly enter the receiving counterbore (53) when the mold is closed.

6. The injection mold with a PIN pin circumferential alignment structure according to claim 1, characterized in that: The lower mold core (34) of the mold core assembly (30) is provided with a reserved through hole (35), and the reserved through hole (35) is used to place the prefabricated PIN needle (60) and allow the needle tail (61) of the prefabricated PIN needle (60) to extend into the mold cavity (31).

7. The injection mold with a PIN circumferential guide structure according to claim 1, characterized in that: The mold frame assembly (20) is provided with an upper mold frame (21) and a lower mold frame (22); the upper mold core (32) of the mold core assembly (30) is fixedly connected to the upper mold frame (21), and the lower mold core (34) is fixedly connected to the lower mold frame (22).

8. The injection mold with a PIN circumferential guide structure according to claim 1, characterized in that: The ejection assembly (40) is provided with an ejector plate (41), a product ejector (42) and a needle ejector (43); the product ejector (42) and the needle ejector (43) are respectively fixed to the ejector plate (41); the ejector plate (41) is movably connected to the lower mold frame (22); one end of the needle ejector (43) is fixed to the ejector plate (41), and the other end thereof penetrates into a reserved through hole (35) and abuts against a prefabricated PIN needle (60).

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