Injection mold for connector

Abstract

The present invention relates to an injection mold of a connector, wherein the connector comprises a terminal and a plastic body, and the injection mold comprises a lower mold plate, a lower mold core fixed to the lower mold plate, an upper mold plate, an upper mold core fixed to the upper mold plate, and a core pulling block, wherein the upper mold core and the lower mold core respectively have an upper injection molding cavity and a lower injection molding cavity for injection molding the plastic body, and further comprises a slider and a locking mechanism, wherein the slider can be slidably mounted on the lower mold plate, and when the slider slides to the frontmost position, it is located at an injection molding working position, the front end of the core pulling block has an injection molding head, and the injection molding head is provided with a plug hole for inserting the terminal, the core pulling block is detachably mounted on the front side of the slider and is fixed to the slider in the front and rear upper direction, when the slider is located at the injection molding working position, the injection molding head of the core pulling block is located in the lower injection molding cavity, and the locking mechanism acts on the slider to lock the slider at the injection molding working position.

Description

Technical Field

[0001] The invention relates to the field of injection molds, and in particular to an injection mold for a connector. Background Art

[0002] Connectors, also known as connectors, plugs and sockets, are a type of connection component that we often come into contact with in the field of electronic engineering. They are often used to connect wire harnesses and wire harnesses, or wire harnesses and electrical components. Connectors are often manufactured by injection molding. During the injection molding process, the terminals are inserted into the core pull block, and then the injection molding is performed. The terminals are used as inserts, and a plastic body is formed on the terminals. The part of the terminal inserted into the core pull block is outside the plastic body. That is, the connector includes a plastic body and a part of the terminal embedded in the plastic body. See the attached Figure 1 As shown, the shape of the internal hole of the connector is determined by the portion of the core pulling block extending into the plastic body.

[0003] In existing injection molds, the core pull block is a fixed part of the mold core. The terminal is installed when the injection mold is opened. Since many injection molds are small in size and are blocked by the injection molding machine table, the process of inserting a small terminal into the core pull block is very inconvenient, time-consuming and labor-intensive, and it is easy to damage other parts. In addition, after the injection molding is completed, when the mold is opened, when taking out the molded connector, it is necessary to separate the connector from the core pull block before taking it out, which is cumbersome and has low work efficiency. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide an injection mold for a connector, which is convenient and efficient in terminal installation, and convenient and efficient in removing the connector after injection molding, and has high working efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides an injection mold of a connector, the connector includes a terminal and a plastic body, the injection mold includes a lower mold plate, a lower mold core fixed to the lower mold plate, an upper mold plate, an upper mold core fixed to the upper mold plate, and a core pulling block, the upper mold core and the lower mold core respectively have an upper injection molding cavity and a lower injection molding cavity for injection molding the plastic body, and also include a slider and a locking mechanism, the slider can be slidably installed on the lower mold plate, and when the slider slides to the frontmost position, it is located in the injection molding working position, the front end of the core pulling block has an injection molding head, and the injection molding head is provided with a plug hole for inserting the terminal, the core pulling block is detachably installed on the front side of the slider and is fixed to the front and rear upper direction of the slider; when the slider is located in the injection molding working position, the injection molding head of the core pulling block is located in the lower injection molding cavity, and the locking mechanism acts on the slider to lock the slider in the injection molding working position.

[0006] Furthermore, the locking mechanism includes a limit assembly and a locking structure, the limit assembly includes a limit pin, an elastic structure, and a pressure rod, the limit pin can be installed on the lower template so as to be movably installed up and down and is fixed in the front-to-back direction, the elastic structure acts on the limit pin to provide an upward elastic force to the limit pin, the pressure rod is fixed to the upper template and is located above the limit pin, a limit stop surface is provided on the rear side of the slider, and when the slider is in the injection working position, the distance between the limit pin and the limit stop surface in the front-to-back direction is zero; the locking structure includes a locking block fixed to the lower end of the upper template; when the injection mold is closed, the pressure rod presses against the limit pin to make it lower than the slider, and the locking block acts on the slider to lock the slider.

[0007] Furthermore, the elastic structure includes a pin return spring arranged at the lower end of the limiting pin.

[0008] Furthermore, an upper pressing inclined surface is provided at the lower end of the locking block, and a lower pressing inclined surface is provided on the sliding block; when the mold is closed, the upper pressing inclined surface is pressed against the lower pressing inclined surface.

[0009] Furthermore, it also includes a linkage mechanism connecting the upper template and the slider, and when the upper template is opened and moved upward, the linkage mechanism drives the slider to slide backward.

[0010] Furthermore, the linkage mechanism includes a spring column structure arranged on the slider, and an inclined guide column whose upper end is fixed to the upper template, the spring column structure includes two spring columns arranged opposite to each other on the left and right, and a spring column reset spring acting on the spring column, the spring column can move left and right, and is fixed to the slider in the front-rear direction, the spring column reset spring provides an inward elastic force to the spring column, the upper side of the inclined guide column is provided with a guide inclined plane inclined toward the rear, the left and right sides of the inclined guide column are respectively provided with a guide sliding surface, and the lower ends of the two guide sliding surfaces are connected, and the upper ends are respectively connected to the left and right sides of the guide inclined plane, and the guide sliding surface has a smooth transition from bottom to top; when the slider is located at the injection molding working position, the inclined guide column can enter between the two spring columns when moving downward, and the inner end of the spring column slides upward relatively along the guide sliding surface.

[0011] Furthermore, the two guide sliding surfaces in the inclined guide column are arc surfaces and are symmetrical left and right, and the inner end of the elastic column is a hemispherical portion.

[0012] Furthermore, the single-side gap between the plug-in hole in the core-pulling block and the terminal is less than or equal to 0.02 mm.

[0013] Furthermore, the sliding block is provided with a vertical mounting slot, the core-pulling block has a clamping portion adapted to the mounting slot, and the clamping portion is inserted into the mounting slot.

[0014] Furthermore, a handle is provided at the upper end of the core pulling block.

[0015] As described above, the injection mold according to the present invention has the following beneficial effects:

[0016] By setting a detachable core pulling block, a slider and a locking mechanism, before injection molding, the injection mold is in a mold opening state, the core pulling block is located outside the mold, and the injection molding work starts. The terminal is inserted into the core pulling block outside the mold, and then the core pulling block is installed on the slider. The slider slides to the frontmost injection molding work position, and the slider position is locked by the locking mechanism, so that the slider is stable in the mold, and the injection molding heads of the terminal and the core pulling block are located in the lower mold core; then the mold is closed, and the upper mold core, the lower mold core, and the core pulling block cooperate with each other to form a complete injection molding cavity; then injection molding is performed to obtain a plastic body coated on the terminal and the injection molding head. After the injection molding is completed, during or after the mold opening, the locking mechanism releases the lock on the slider, the slider is retreated, the slider drives the core pulling block to retreat, and the injection molding head is pulled out of the plastic body, thereby obtaining an independent connector, which is convenient for removing the connector from the lower mold core, and the core pulling block is convenient for removing from the slider. Through the core pulling block and the slider, the terminal insertion operation is completed outside the mold, which is convenient for operation. When installing the core pulling block, there is a distance between the slider and the lower mold core, which is convenient for the installation of the core pulling block. Then the slider and the locking mechanism are used to accurately position and lock the terminal. In this way, the installation of the terminal is convenient and efficient, and it is not easy to damage other parts of the mold core, thereby ensuring the injection molding quality. At the same time, after the injection molding is completed, it is convenient to separate the core pulling block from the plastic body, facilitate the removal of the connector, and improve the work efficiency and quality of the connector injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the connector structure.

[0018] Figure 2 This is a schematic diagram of the structure of the injection mold of the present invention, in which some structures are omitted.

[0019] Figure 3 It is a working schematic diagram of the injection mold of the present invention in an initial state.

[0020] Figure 4 It is a schematic diagram of the assembly of the terminal and the core pulling block in the present invention.

[0021] Figure 5 It is a working schematic diagram of the injection mold of the present invention in the first working state.

[0022] Figure 6 It is a schematic diagram of the operation of the injection mold of the present invention in the second working state.

[0023] Figure 7 It is a schematic diagram of the operation of the injection mold of the present invention in the third working state.

[0024] Figure 8 It is a schematic diagram of the operation of the injection mold of the present invention in the fourth working state.

[0025] Fig. 9 It is a structural schematic diagram of the slider in the present invention.

[0026] Fig.10 for Fig. 9 Top view of the .

[0027] Fig.11 It is a working schematic diagram of the inclined guide column and the elastic column of the linkage mechanism in the present invention.

[0028] Component number description

[0029] 1 Next template

[0030] 2 Lower mold core

[0031] 3 Upper template

[0032] 4 Core pulling block

[0033] 41 Injection head

[0034] 42 Card connection

[0035] 5 Sliders

[0036] 51 Limit stop surface

[0037] 52 Strip slots

[0038] 53 Lower pressing slope

[0039] 54 Tie rod

[0040] 55 Mounting card slot

[0041] 6 Limiting components

[0042] 61 Limit pin

[0043] 62 Pin return spring

[0044] 63 Pressure rod

[0045] 64 Base

[0046] 7 Linkage mechanism

[0047] 71 inclined guide column

[0048] 711 Guide inclined plane

[0049] 712 Guide sliding surface

[0050] 72 Pillar

[0051] 73 Spring return spring

[0052] 8 Locking block

[0053] 81 Upper pressing slope

[0054] 9 Connectors

[0055] 91 terminal

[0056] 92 Body Shaping DETAILED DESCRIPTION

[0057] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0058] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0059] See also Figures 1 to 11 The present invention provides an injection mold for a connector, which is used for injection molding a connector 9 with a terminal 91, see Figure 1 , the connector 9 includes a terminal 91 and a plastic body 92 covered on the terminal 91, and the terminal part extends out of the plastic body 92. The injection mold of the present invention includes a lower mold plate 1, a lower mold core 2 fixed to the lower mold plate 1, an upper mold plate 3, an upper mold core (not shown in the drawings) fixed to the upper mold plate 3, and a core pull block 4, the upper mold core and the lower mold core 2 respectively have an upper injection molding cavity and a lower injection molding cavity for molding the plastic body 92, and also include a slider 5 and a locking mechanism, the slider 5 can be slidably mounted on the lower mold plate 1, and the slider 5 is located at the injection molding working position when it slides to the frontmost position, the front end of the core pull block 4 has an injection molding head 41, and the injection molding head 41 is provided with a plug hole for inserting the terminal 91, the core pull block 4 is detachably mounted on the front side of the slider 5, and is fixed to the slider 5 in the front and rear upper direction, when the slider 5 is located at the injection molding working position, the injection molding head 41 of the core pull block 4 is located in the lower injection molding cavity, and the locking mechanism acts on the slider 5 to lock the slider 5 in the injection molding working position.

[0060] The main working principle of the injection mold of the present invention is: before injection molding, in the initial state, see Figure 3, the injection mold is in the open mold state, the core block 4 is located outside the mold, and the slider 5 slides to the final position; after the injection molding work starts, the terminal 91 is first inserted into the core block 4, see Figure 4 , and then install the core-pulling block 4 carrying the terminal 91 onto the slider 5. At this time, since the slider 5 is at a certain distance from the lower mold core 2, it is convenient to install the core-pulling block 4 and it is not easy to damage other parts of the mold. Then the slider 5 slides to the front injection molding working position and locks the slider 5 in the injection molding working position through the locking mechanism. See Figure 4 At this time, the terminal 91 and the injection head 41 of the core pulling block 4 are located in the lower injection cavity of the lower mold core 2; then the upper mold plate 3 is lowered to close the mold, the upper mold core 2, and the core pulling block 4 cooperate with each other, and the lower injection cavity, the upper injection cavity, and the injection head 41 together form a complete injection cavity, see Figure 6 ; In the mold closing state, the position of the slider 5 is locked and kept stable, and then the plastic body 92 is injected to obtain the plastic body 92 covering the terminal 91 and the injection head 41. After the injection molding is completed, during or after the mold opening, the limit of the sliding of the limit assembly 6 is released, the slider 5 is pulled back and slid, the core pulling block 4 is driven back, and the injection head 41 is pulled out from the plastic body 92, so as to obtain an independent connector 9, see Figure 7 Finally, the connector 9 can be easily removed from the lower mold core 2, see Figure 8 After the connector 9 is taken out, the core-pulling block 4 is taken out from the slider 5, and the injection mold is in the initial state, and the injection molding work of the next connector 9 can be carried out.

[0061] The injection mold of the present invention completes the insertion operation of the terminal 91 outside the mold through the core pulling block 4 and the slider 5, and then the core pulling block 4 is installed. The core pulling block 4 has a large operating space during installation and is easy to install. The slider 5 and the locking mechanism are used to accurately position and lock the terminal 91, ensuring that the installation of the terminal 91 is convenient and efficient, and it is not easy to damage other parts of the mold core, thereby ensuring the quality of injection molding. At the same time, after the injection molding is completed, it is convenient to separate the core pulling block 4 from the plastic body 92, and it is convenient to take out the connector 9, thereby improving the working efficiency and quality of the injection molding of the connector 9.

[0062] See also Figures 1 to 11 The present invention is further described below with reference to a specific embodiment.

[0063] In this embodiment, see Figure 2As a preferred design, the locking mechanism includes a limit assembly 6 and a locking structure. The limit assembly 6 includes a limit pin 61, an elastic structure, and a pressure rod 63. The limit pin 61 is installed in the lower template 1 so as to be movable up and down and fixed in the front-to-back direction. The elastic structure acts on the limit pin 61 and provides an upward elastic force to the limit pin 61. Specifically, the limit pin 61 is installed in the vertical hole of the lower template 1. The elastic structure includes a pin return spring 62 arranged at the lower end of the limit pin 61. The pin return spring 62 The lower end is installed on a base 64 fixed to the lower template 1, the pressure rod 63 is fixed to the upper template 3 and is located above the limit pin 61, the rear side of the slider 5 is provided with a limit stop surface 51, and when the slider 5 is located in the injection working position, the distance between the limit pin 61 and the limit stop surface 51 in the front and rear directions is zero. The locking structure includes a locking block 8 fixed to the lower end of the upper template 3, and an upper clamping slope 81 is provided at the lower end of the locking block 8. The slider 5 is provided with a lower clamping slope 53, and the upper clamping slope 81 is opposite to the lower clamping slope 53 up and down.

[0064] The specific working principle of the locking mechanism in this embodiment is as follows: when the injection mold is in the initial state, Figure 3 , the limit pin 61 is located below the slider 5, at this time, the pin return spring 62 is in a compressed state, and the limit pin 61 will not limit the slider 5 from sliding forward and backward. When the slider 5 slides forward to its injection working position, see Figure 5 The limit pin 61 is rebounded upward by the pin return spring 62 to abut against the limit stop surface 51 of the slider 5, preventing the slider 5 from retreating and achieving the limit stop. During the mold closing process, the pressure rod 63 and the locking block 8 move downward with the lower mold plate 1, and the pressure rod 63 presses on the upper end of the limit pin 61 to press the limit pin 61 downward. In the mold closing state, the limit pin 61 is lower than the slider 5, and the limit pin 61 no longer blocks the slider 5. At this time, the upper pressing slope 81 of the locking block 8 is pressed on the lower pressing slope 53 of the slider 5, locking the slider 5 position, see Figure 6 , complete the positioning of the slider 5 during the high-pressure transition state during injection molding, and ensure that the slider 5 can remain stable under the high pressure during injection molding. During the mold opening process, the upper mold plate 3 moves up, the pressure rod 63 and the locking block 8 move up with the lower mold plate 1, the upper clamping slope 81 is separated from the lower clamping slope 53, and the slider 5 slides backward (this operation can be performed on the slider 5 alone, or the slider 5 can be linked with the upper mold plate 3), and the limit pin 61 is bounced up with the upward movement of the pressure rod 63, and finally abuts against the lower end of the slider 5.

[0065] The locking mechanism in this embodiment divides the locking of the slider 5 into two parts. One is to limit the slider 65 from sliding backward before closing and opening the mold by the limit assembly 6, and no longer limit the slider 6 from sliding backward when closing the mold. The other is to lock the position of the slide block 5 by the locking structure when closing the mold, to ensure that the slider 5 can be stable under the high pressure of injection molding, and to release the lock as the mold is opened, so that the slider 65 can slide backward smoothly. Through the ingenious cooperation of the limit assembly 6 and the locking structure, the injection mold can complete the automatic locking and automatic unlocking of the slide block during the closing and opening of the mold, which is convenient and efficient. Of course, the locking mechanism is not limited to the structure in this embodiment. In other embodiments, other existing reasonable designs can also be adopted to achieve the locking function of the slider 5.

[0066] In this embodiment, as a preferred design, the injection mold further includes a linkage mechanism 7 connecting the upper mold plate 3 and the slider 5. When the upper mold plate 3 is opened and moved upward, the linkage mechanism 7 drives the slider 5 to slide backward, so that the separation of the core-pulling block 4 and the plastic body 92 is automatically completed during the mold opening process, which is convenient for removing the connector 9 and the core-pulling block 4, reducing invalid operation time and improving work efficiency. Figure 2 , Fig. 9 and 11 The linkage mechanism 7 includes an elastic column structure arranged on the slider 5, and an inclined guide column 71 whose upper end is fixed to the upper template 3. The elastic column structure includes two elastic columns 72 arranged opposite to each other on the left and right, and an elastic column return spring 73 acting on the elastic column 72. The elastic column 72 is installed in a sliding hole extending left and right in the slider 5. The elastic column return spring 73 abuts against the outer end of the elastic column 72, so that the elastic column 72 can slide freely in the left and right directions and is fixed to the slider 5 in the front and rear directions. The elastic column return spring 73 applies an inward elastic force to the elastic column 72, so that the two elastic columns 72 are brought closer. A guide inclined plane 711 inclined toward the rear is provided on the upper side of the inclined guide column 71, and a guide sliding surface 712 is respectively provided on the left and right sides of the inclined guide column 71, and the two guide sliding surfaces 712 are connected at the lower ends and connected to the left and right sides of the guide inclined plane 711 at the upper ends, respectively. The guide sliding surface 712 has a smooth transition from bottom to top, see Fig.11When the slider 5 is located at the injection molding working position, the inclined guide column 71 moves downward and enters between the two elastic columns 72, and the inner end of the elastic column 72 slides upward relatively along the guide sliding surface 712. In this embodiment, the cross-sectional shape of the inclined guide column 71 is partially circular, and the arc surfaces on the left and right sides of the inclined guide column 71 constitute the guide sliding surface 712. The guide sliding surface 712 has a smooth transition from bottom to top, and the inner end of the elastic column 72 is a hemispherical portion, so as to facilitate the inclined guide column 71 to enter between the two elastic columns 72 and facilitate the inner end of the elastic column 72 to slide upward relatively along the guide sliding surface 712. Of course, the cross-section of the inclined guide column 71 can also be other shapes, such as a cone, etc., as long as it is ensured that the inclined guide column 71 can pass through the two guide sliding surfaces 712 to enter between the two elastic columns 72 and finally be located below the two elastic columns 72. Furthermore, a strip groove 52 extending in the front-to-back direction is provided on the upper end surface of the slider 5, and the two elastic columns 72 are respectively located on the left and right sides of the strip groove 52, see Fig. 9 and Fig.10 The purpose of the strip groove 52 is to allow the inclined guide column 71 to enter the strip groove 52 during mold closing without causing interference, thereby not affecting mold closing.

[0067] The working principle of the linkage mechanism 7 in this embodiment is as follows: during the mold closing process, the inclined guide column 71 moves downward along with the upper mold plate 3, first enters the strip groove 52 of the slider 5, and then the lower side of the inclined guide column 71 contacts the two elastic columns 72, see Fig.11 (A) shown in the state; when continuing to descend, under the action of the two arc-shaped guide sliding surfaces 712, the inclined guide column 71 enters between the two spring columns 72, and the two spring column return springs 73 are compressed, see Fig.11 (B) As a result, the linkage mechanism 7 will not affect the mold closing process; the inclined guide column 71 continues to press down until the spring column 72 is located above the guide inclined plane 711, and the two spring columns 72 are reset under the action of the spring column reset spring 73, and the two spring columns 72 are close to each other and abut against the guide inclined plane 711. At this time, the mold is in the closing state, see Fig.11 (C) State shown. During the mold opening process, the inclined guide column 71 moves upward along with the upper mold plate 3, and at this time, the spring column 72 slides downwardly and obliquely on the guiding inclined plane 711, so that the guiding inclined plane 711 pushes the spring column 72 to move backward, and the spring column 72 drives the slider 5 to move backward, thereby realizing the linkage of the backward movement of the slider 5 and the upward movement of the upper mold plate 3, and moving synchronously. Moreover, in this embodiment, before the pressure rod 63 leaves the limit pin 61, the slider 5 has already slid above the limit pin 61. The use of this linkage mechanism 7 will not affect the mold closing process, and automatically drives the slider 5 to slide backward when the mold is opened. It has a simple structure and is convenient and flexible to work. Of course, in other embodiments, the linkage mechanism 7 can also adopt other existing reasonable designs that can realize the synchronous movement of the slider 5 backward.

[0068] In the present invention, since the terminal 91 is to be plugged into the plug hole of the injection molding head 41 of the core pulling block 4, the size of the terminal 91 is smaller than the plug hole size. Preferably, in this embodiment, the single-side gap between the plug hole in the core pulling block 4 and the terminal 91 is less than or equal to 0.02 mm, so as to ensure that the terminal 91 is plugged in conveniently and stably, and the rubber material will not enter the gap between the plug hole and the terminal 91 to form burrs during injection molding. Among them, the terminal 91 can be a terminal 91 of various shapes. In this embodiment, it is particularly suitable for L-shaped terminals 91.

[0069] In this embodiment, see Figure 4 , Fig. 9 and 10 As a preferred design, a vertical mounting slot 55 is provided on the slider 5, and the core pulling block 4 has a clamping portion 42 adapted to the mounting slot 55, and the clamping portion 42 is inserted into the mounting slot 55. During installation, it is only necessary to vertically insert the core pulling block 4 into the mounting slot 55 of the slider 5, and the two are fixed in the front-to-back direction, and can be vertically pulled out after use, so that the core pulling block 4 is convenient and flexible to disassemble and assemble, and the work efficiency is high. In addition, a handle is provided at the upper end of the core pulling block 4 to facilitate vertical pulling, and a pull rod 54 is provided at the rear end of the slider 5 to facilitate pulling the slider 5 to slide forward and backward. Of course, in other embodiments, the core pulling block 4 can also be installed in the slider 5 in other detachable ways.

[0070] The specific working process of the injection mold in this embodiment for the injection molding production of the connector 9 is as follows:

[0071] (1) See Figure 3 Before injection molding, in the initial state, the injection mold is in an open mold state, the core pulling block 4 is located outside the mold, and the slider 5 slides to the final position. At this time, the limit pin 61 is located below the slider 5.

[0072] (2) See Figure 4 , insert the terminal 91 into the core-pulling block 4.

[0073] (3) See Figure 5 , insert the core pulling block 4 carrying the terminal 91 vertically into the mounting slot 55 of the slider 5, and then slide the slider 5 to the front injection molding working position. The limit pin 61 bounces up under the action of the pin return spring 62 and abuts against the limit stop surface 51 to prevent the slider 5 from retreating, so that the slider 5 is stably positioned in the injection molding working position. At this time, the terminal 91 and the injection molding head 41 of the core pulling block 4 are located in the lower injection molding cavity of the lower mold core 2.

[0074] (5) See Figure 6, the upper mold plate 3 moves downward to the mold closing state, the pressure rod 63 presses the limit pin 61 down to below the slider 5, the upper pressing inclined surface 81 of the locking block 8 presses on the lower pressing inclined surface 53 of the slider 5, and the slider 5 is pressed and locked. The pressure rod 63 presses the limit pin 61 down to below the slider 5, and the inclined guide column 71 enters the strip groove 52 and enters the two spring columns 72 and finally is located below the two spring columns 72, see Fig.11 In the mold closing state, the upper injection cavity, the lower injection cavity, and the injection head 41 of the core pulling block 4 cooperate with each other to form a complete injection cavity.

[0075] (6) See Figure 8 , perform injection molding to form a plastic body 92 covering the terminal 91 and the injection molding head 41, and obtain the connector 9; then open the mold, the upper mold plate 3 drives the pressure rod 63, the inclined guide column 71 and the locking block 8 to move upward synchronously, and the inclined guide column 71 drives the slider 5 to move backward synchronously through the elastic column 72. Before the pressure rod 63 separates from the limit pin 61, the slider 5 is already above the limit pin 61, and the slider 5 drives the core pulling block 4 to move backward and be pulled out from the plastic body 92, thereby obtaining an independent connector 9,

[0076] (7) See Fig. 9 , the connector 9 is taken out from the lower mold core 2, the injection mold is in the initial state, and the next injection molding work can be carried out.

[0077] The injection mold of the present invention can be used to inject a variety of connectors 9, in particular, it can be used for special-shaped connectors 9 with complex and irregular shaped plastic bodies 92. Since the mold core structure corresponding to the plastic body 92 is more complex, the injection mold of the present invention is used, and the terminal 91 is easy to install and is not easy to affect other structures of the mold core.

[0078] In summary, the invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0079] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An injection mold for a connector, the connector (9) comprising a terminal (91) and a plastic body (92), the injection mold comprising a lower mold plate (1), a lower mold core (2) fixed to the lower mold plate (1), an upper mold plate (3), an upper mold core fixed to the upper mold plate (3), and a core pulling block (4), the upper mold core and the lower mold core (2) respectively having an upper injection molding cavity and a lower injection molding cavity for molding the plastic body (92), characterized in that: The invention also comprises a slider (5) and a locking mechanism, wherein the slider (5) can be slidably mounted on the lower mold plate (1) forward and backward, and when the slider (5) slides to the frontmost position, it is located at the injection molding working position, the front end of the core pulling block (4) has an injection molding head (41), and the injection molding head (41) is provided with a plug hole for inserting a terminal (91), and the core pulling block (4) can be detachably mounted on the front side of the slider (5) and is fixed to the slider (5) in the front and rear upper direction; when the slider (5) is located at the injection molding working position, the injection molding head (41) of the core pulling block (4) is located in the lower injection molding cavity, and the locking mechanism acts on the slider (5) to lock the slider (5) in the injection molding working position; the locking mechanism comprises a limit assembly (6) and a locking structure, and the limit assembly (6) comprises a limit pin (61), an elastic structure (62), and a locking structure. The invention relates to a molded part comprising a plurality of molds, a plurality of molds and a pressure rod (63), wherein the limit pin (61) is installed on the lower mold plate (1) so as to be movable up and down and is fixed in the front-to-back direction, the elastic structure acts on the limit pin (61) to provide an upward elastic force to the limit pin (61), the pressure rod (63) is fixed to the upper mold plate (3) and is located above the limit pin (61), a limit stop surface (51) is provided on the rear side of the slider (5), and when the slider (5) is located in the injection working position, the spacing between the limit pin (61) and the limit stop surface (51) in the front-to-back direction is zero; the locking structure comprises a locking block (8) fixed to the lower end of the upper mold plate (3); when the injection mold is closed, the pressure rod (63) presses against the limit pin (61) to make it lower than the slider (5), and the locking block (8) acts on the slider (5) to lock the slider (5).

2. The injection mold according to claim 1, characterized in that: The elastic structure comprises a pin return spring (62) arranged at the lower end of the limiting pin (61).

3. The injection mold according to claim 1, characterized in that: An upper pressing inclined surface (81) is provided at the lower end of the locking block (8), and a lower pressing inclined surface (53) is provided on the sliding block (5); when the mold is closed, the upper pressing inclined surface (81) is pressed against the lower pressing inclined surface (53).

4. The injection mold according to claim 1, characterized in that: It also comprises a linkage mechanism (7) connecting the upper template (3) and the slider (5); when the upper template (3) is opened and moved upward, the linkage mechanism (7) drives the slider (5) to slide backward.

5. The injection mold according to claim 4, characterized in that: The linkage mechanism (7) comprises an elastic column structure arranged on the slider (5) and an inclined guide column (71) whose upper end is fixed to the upper template (3). The elastic column structure comprises two elastic columns (72) arranged opposite to each other on the left and right, and an elastic column reset spring (73) acting on the elastic columns (72). The elastic columns (72) can move left and right and are fixed to the slider (5) in the front-back direction. The elastic column reset spring (73) provides an inward elastic force to the elastic columns (72). The upper side of the inclined guide column (71) is provided with a rearwardly inclined elastic column. A guiding inclined plane (711), a guiding sliding surface (712) is respectively provided on the left and right sides of the inclined guide column (71), and the lower ends of the two guiding sliding surfaces (712) are connected, and the upper ends are respectively connected to the left and right sides of the guiding inclined plane (711), and the guiding sliding surfaces (712) transition smoothly from bottom to top; when the slider (5) is located at the injection molding working position, the inclined guide column (71) can enter between the two elastic columns (72) when it moves downward, and the inner side end of the elastic column (72) slides upward relatively along the guiding sliding surface (712).

6. The injection mold according to claim 5, characterized in that: The two guide sliding surfaces (712) in the inclined guide column (71) are arcuate surfaces and are symmetrical on the left and right sides, and the inner end of the elastic column (72) is a hemispherical portion.

7. The injection mold according to claim 1, characterized in that: The single-side gap between the plug-in hole in the core-pulling block (4) and the terminal (91) is less than or equal to 0.02 mm.

8. The injection mold according to claim 1, characterized in that: The slide block (5) is provided with a vertical mounting slot (55), the core pulling block (4) has a clamping portion (42) adapted to the mounting slot (55), and the clamping portion (42) is inserted into the mounting slot (55).

9. The injection mold according to claim 8, characterized in that: A handle is provided at the upper end of the core-pulling block (4).

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