Injection mold

Abstract

The present invention discloses an injection mold, wherein an upper mold core is arranged in the upper mold plate, a first lower mold core is arranged in the lower mold plate, and a second lower mold core is arranged in the lower mold support plate. The upper mold core, the first lower mold core, and the second lower mold core are molded together to form a cavity for injection molding. During injection molding, the terminal is arranged in the cavity. The injection mold also includes a driving mechanism for driving the lower mold plate to separate and fit with the lower mold support plate, and a first slider mechanism and a second slider mechanism for fixing the top end and the side end respectively during injection molding. The injection mold of the present invention can open the injection molding cavity to place the terminal by arranging a split lower mold core, and fix the terminal by arranging the first slider mechanism and the second slider mechanism to prevent the terminal from deforming during the injection molding process. The positioning accuracy is high, and the mold is easy to disassemble and assemble, which improves the production efficiency and ensures the product qualification rate. It is suitable for the injection molding of terminals with two or more complex structural designs.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to an injection mold suitable for preparing an injection molded product wrapped with two or more terminals of complex structures. Background Art

[0002] With the development and popularization of new energy vehicles, automotive products are being used more and more widely. Automotive products cannot do without weak signal transmission and strong current transmission. The subsequent development of terminal embedded plastic injection molding has also been rapidly developed. Taking advantage of the excellent conductivity of copper terminals and the insulation of plastics, the possibility of complex product design and molding, embedded injection molding parts are increasingly used in automotive electronics. At the same time, automotive products also have very strict functional requirements for terminal embedded plastic injection molding products, such as air tightness, resistance to electrical breakdown, cold and hot shock, etc. The complex design of the terminal structure makes the design of the injection mold more difficult. In order to ensure the above performance, multiple solutions are needed in mold design to improve production efficiency and product quality.

[0003] Terminals are components used to transmit electrical signals or conduct electricity. Due to their convenient connection performance, they are widely used in the connection of various electronic circuits. For example, a large number of terminals are used in automotive electronic products. With the development of automotive electronic products, terminal products formed by embedding copper terminals in plastic injection molding have gradually become mainstream. The excellent conductivity of copper terminals and the insulation of plastics make it possible to design and mold complex products. Embedded terminal injection molding is increasingly used in automotive electronic products. As automotive electronic products have increasingly stringent functional requirements for terminal products, the structure of their encapsulated products has become increasingly complex, and the structure of the injection mold also needs to meet corresponding changes. Summary of the invention

[0004] In view of this, in order to overcome the defects of the prior art, an object of the present invention is to provide an improved injection mold capable of preparing an injection molded product wrapped with two or more terminals of complex structures.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An injection mold is used to prepare an injection molded product that wraps two or more terminals. The terminals include a bottom rod, a top end portion and a side end portion. The injection mold includes a top plate, an upper mold support plate, an upper mold plate, a lower mold plate, a lower mold support plate and a bottom plate from top to bottom. An upper mold core is arranged in the upper mold plate, a first lower mold core is arranged in the lower mold plate, and a second lower mold core is arranged in the lower mold support plate. The upper mold core, the first lower mold core and the second lower mold core are molded together to form a cavity for injection molding. During injection molding, the terminals are arranged in the cavity. The injection mold also includes a driving mechanism for driving the lower mold plate to separate and fit with the lower mold support plate, and a first slider mechanism and a second slider mechanism respectively used to fix the top end portion and the side end portion during injection molding. The second lower mold core is provided with a slot for fixing the bottom rod.

[0007] The traditional integrated lower mold core is divided into a first lower mold core and a second lower mold core which are separate. The first lower mold core and the second lower mold core can be separated. A slot is arranged on the second lower mold core. The lower mold plate is separated from the lower mold support plate by a driving mechanism, so that the terminal is inserted into the slot through the gap between the lower mold plate and the lower mold support plate, thereby fixing the terminal on the second lower mold core. After that, the top end and the side end of the terminal are fixed respectively by the first slider mechanism and the second slider mechanism, thereby firmly fixing the terminal in the cavity to prevent the terminal from being displaced during injection molding.

[0008] According to some preferred implementation aspects of the present invention, the injection-molded product includes an inclined surface and a first inner groove, and the injection mold further includes a third slider mechanism for forming the inclined surface and the first inner groove during injection molding.

[0009] The first slider mechanism, the second slider mechanism and the third slider mechanism all include a fixed slide rail, a slide block matched with the slide rail, a guide groove provided on the slide block and an inclined guide column matched with the guide groove, and the movement of the slide block is controlled by the cooperation between the inclined guide column and the guide groove. The slide block moves on the fixed slide rail, the inclined guide column moves in the guide groove, the inclined guide column and the guide groove can control the movement of the slide block, and the slide rail limits the movement of the slide block.

[0010] Preferably, the inclined guide pillars of the first slider mechanism and the second slider mechanism are fixed on the upper template, the inclined guide pillars of the third slider mechanism are fixed on the lower template, the slide rails of the first slider mechanism and the second slider mechanism are fixed on the lower template, and the slide rails of the third slider mechanism are fixed on the lower mold support plate. The inclination direction of the inclined guide pillars is that the upper end to the lower end of the inclined guide pillars gradually faces the outside of the injection mold. The horizontal height of the first slider mechanism is higher than the horizontal height of the second slider mechanism, and the horizontal height of the second slider mechanism is higher than the horizontal height of the third slider mechanism.

[0011] When opening the mold, the upper mold plate is separated from the lower mold plate, driving the inclined guide pillars of the first slider mechanism and the second slider mechanism to move upward. Through the cooperation of the inclined guide pillars and the guide grooves, the sliding blocks of the first slider mechanism and the second slider mechanism retreat (move away from the injection mold). When the driving mechanism drives the lower mold plate to separate from the lower mold plate, the inclined guide pillars of the third slider mechanism move upward, driving its sliding block to retreat (move away from the injection mold). After placing the terminal, the driving mechanism drives the lower mold plate to fit with the lower mold plate, and the inclined guide pillars of the third slider mechanism move downward, pushing the sliding block of the third slider mechanism inward.

[0012] Preferably, a slot for fixing the top end of the terminal is provided on the sliding block of the first slider mechanism, and the top end of the terminal is inserted into the slot. The top end of the terminal is fixed by the slot on the sliding block of the first slider mechanism. A matching groove for matching with the lower rod of the terminal is also provided on the bottom of the sliding block of the first slider mechanism.

[0013] Preferably, a fixing groove for fixing the side end of the terminal is provided on the sliding block of the second slider mechanism, and the side end of the terminal is inserted into the fixing groove, and a separation block for separating the two side ends of the terminal is also provided on the sliding block of the second slider mechanism. The side end of the terminal is fixed by the fixing groove on the sliding block of the second slider mechanism, and the separation block ensures that the side ends of the two terminals are accurately positioned and do not touch during injection molding.

[0014] The sliding block of the third slider mechanism has an inclined guide surface matching the inclined surface of the injection molded product and a convex block for forming the first inner groove. Other shapes and structural features of the injection molded product are formed by the end of the sliding block and the upper mold core, the first lower mold core and the second lower mold core.

[0015] Preferably, the first slider mechanism and the second slider mechanism are further provided with a toggle mechanism, the toggle mechanism is provided corresponding to the guide groove, the toggle mechanism is used to toggle the first slider mechanism and the second slider mechanism outward when the inclined guide column moves upward, and to allow the inclined guide column to freely enter the guide groove when the inclined guide column moves downward. The toggle mechanism includes a fixing member fixed on the sliding block, an elastic member sleeved on the fixing member, and a paddle slidably provided on the sliding block, and a chamfer is provided on the side of the paddle away from the sliding block.

[0016] When the mold is opened, the upper template moves up, the oblique guide pillar fixed on the upper template moves up, and the guide grooves of the first slider mechanism and the second slider mechanism are provided with a paddle. Through the cooperation of the oblique guide pillar and the paddle, the sliding blocks of the first slider mechanism and the second slider mechanism slide outward. After the terminal is fixed, the lower template is first fitted with the lower mold support plate through the driving mechanism. During the fitting, the sliding block of the third slider mechanism is pushed inward through the cooperation of the oblique guide pillar and the guide groove of the third slider mechanism. Then, the first slider mechanism and the second slider mechanism are manually pushed inward so that the top end is inserted into the slot of the first slider mechanism and the side end is inserted into the fixed groove of the second slider mechanism. After that, the mold is closed, and the upper template moves down. Since the sliding blocks of the first slider mechanism and the second slider mechanism have moved to the predetermined position, it is not necessary to control the movement of the sliding blocks through the cooperation of the oblique guide pillar and the guide groove. The paddle is provided with a chamfer toward the outside of the injection mold. The oblique guide pillar pushes the paddle to both sides through the chamfer. The oblique guide pillar completely enters the guide groove, and the sliding blocks of the first slider mechanism and the second slider mechanism will not move. When the inclined guide pillar completely enters the guide groove, the paddle returns to its original position under the action of the elastic member, so that when the mold is opened next time, the inclined guide pillar can drive the sliding blocks of the first slider mechanism and the second slider mechanism to move outward again through the paddle.

[0017] According to some preferred implementation aspects of the present invention, the driving mechanism includes a first driver for driving, the lower template is provided with a driving block protruding outward, one end of the first driver is connected to the driving block and is used to drive the driving block to move. In a specific embodiment of the present invention, the first driver is fixed to the bottom plate, and the output end of the first driver is fixedly connected to the driving block, thereby driving the lower template to move up and down to achieve separation and bonding between the lower template and the lower mold support plate. The first driver can be set to an even number.

[0018] According to some preferred implementation aspects of the present invention, the injection mold includes a limiting mechanism, which includes a pull rod with an upper end fixed on the lower mold plate, a limiting groove provided on the pull rod, and a limiting protrusion fixed on the lower mold plate, the limiting protrusion is used to slide in the limiting groove, and the extension direction of the limiting groove is the same as the extension direction of the pull rod and the same as the movement direction of the lower mold plate. The first driver drives the lower mold plate to move upward, driving the pull rod to move upward, and the limiting protrusion moves in the limiting groove. When the limiting protrusion moves to the lowermost end of the limiting groove, the driving ends. At this time, the gap between the lower mold plate and the lower mold plate is the largest, so that the terminal is placed in the second lower mold core from the gap.

[0019] According to some preferred implementation aspects of the present invention, the injection mold includes a safety mechanism for preventing the lower template from falling after the lower template is separated from the lower mold support plate, a support plate is also provided between the bottom plate and the lower mold support plate, a safety groove is provided on the support plate, and the safety mechanism includes a safety block slidably provided in the safety groove, and a second driver for driving the safety block to move, and the second driver is fixed on the support plate. When the limiting protrusion moves to the lower end of the limiting groove, the second driver drives the safety block to move inward in the safety groove, so that the safety block moves below the pull rod to resist the bottom of the pull rod to prevent the lower template from falling. A side block is also provided on the side of the lower end of the pull rod to increase the contact area between the pull rod and the safety block and improve safety. When the terminal is placed, the second driver first drives the safety block to withdraw from the safety groove, and then the first driver drives the lower template to move down and fit with the lower mold support plate.

[0020] Compared with the prior art, the advantages of the present invention are as follows: an injection mold of the present invention can open the injection cavity to place the terminal by setting a split lower mold core, and fix the terminal by setting a first slider mechanism and a second slider mechanism to prevent the terminal from deforming during the injection molding process. It has high positioning accuracy and convenient mold disassembly and assembly, which improves production efficiency and ensures product qualification rate. It is suitable for the injection molding of terminals with two or more complex structural designs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0022] Figure 1 A three-dimensional diagram of a terminal in a preferred embodiment of the present invention;

[0023] Figure 2 A three-dimensional diagram of a terminal from another perspective in a preferred embodiment of the present invention;

[0024] Figure 3 A three-dimensional diagram of an injection molded product in a preferred embodiment of the present invention;

[0025] Figure 4 A three-dimensional diagram of an injection molded product from another perspective in a preferred embodiment of the present invention;

[0026] Figure 5 A three-dimensional diagram of the injection molded product from another perspective in a preferred embodiment of the present invention;

[0027] Figure 6 A three-dimensional diagram of an injection mold in a preferred embodiment of the present invention;

[0028] Figure 7 A three-dimensional diagram of an injection mold of a preferred embodiment of the present invention after removing the top plate and the upper mold plate;

[0029] Figure 8 for Figure 7 Enlarged view of the middle I part;

[0030] Fig. 9 for Figure 7 A three-dimensional image after removing the upper template;

[0031] Fig.10 A three-dimensional diagram of a mold core in an injection mold according to a preferred embodiment of the present invention;

[0032] Fig.11 A three-dimensional diagram of a mold core and a sliding mechanism in an injection mold according to a preferred embodiment of the present invention;

[0033] Fig.12 A three-dimensional diagram of a part of a mold core and a sliding mechanism in an injection mold of a preferred embodiment of the present invention;

[0034] Fig.13 A three-dimensional diagram of an injection molded product and a sliding mechanism in an injection mold according to a preferred embodiment of the present invention;

[0035] Fig.14 A top view of a portion of a mold core and a sliding mechanism in an injection mold of a preferred embodiment of the present invention;

[0036] Fig.15 for Fig.14 Sectional view of AA in the middle;

[0037] Fig.16 for Fig.14 Cross-sectional view of the middle BB;

[0038] Fig.17 A three-dimensional diagram of a sliding mechanism in an injection mold according to a preferred embodiment of the present invention;

[0039] Fig.18 A three-dimensional diagram of a sliding mechanism in an injection mold in a preferred embodiment of the present invention from another perspective;

[0040] Fig.19 for Fig.18 Enlarged view of middle part II;

[0041] Fig. 20 A three-dimensional diagram of a sliding block of a first sliding mechanism in a preferred embodiment of the present invention;

[0042] In the accompanying drawings: injection molded product-1, inclined surface-11, first inner groove-12, second inner groove-13, boss-14, first terminal-21, second terminal-22, bottom rod-23, top end-24, side end-25, injection mold-3, top plate-31, upper mold plate-32, upper mold plate-33, upper mold core-331, lower mold plate-34, first lower mold core-341, lower mold plate-35, second lower mold core-351, support plate-36, bottom plate-37, first slider mechanism-41, slot-411, matching slot-412, second slider Block mechanism -42, fixing groove -421, separation block -422, third slider mechanism -43, inclined guide surface -431, protrusion -432, slide rail -51, sliding block -52, guide groove -53, inclined guide column -54, driving mechanism -6, first driver -61, driving block -62, limiting mechanism -7, pull rod -71, limiting groove -72, limiting protrusion -73, safety mechanism -8, safety groove -81, safety block -82, second driver -83, side block -84, toggle mechanism -9, fixing member -91, elastic member -92, paddle -93. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0044] See also Figure 1-20 , an injection mold 3 of this embodiment is used to prepare an injection molded product 1 that wraps two or more complex structure terminals. First, as Figure 1-2 As shown, the two terminals in this embodiment both include a bottom bar 23, a top end 24, and a side end 25. For the convenience of description, the two terminals are named as the first terminal 21 and the second terminal 22. The height of the bottom bar 23 of the second terminal 22 is higher than the height of the bottom bar 23 of the first terminal 21, the horizontal height of the top end 24 of the second terminal 22 is lower than the horizontal height of the top end 24 of the first terminal 21, and the endpoints of the top ends 24 of the two terminals are located in the same vertical plane, and there is no contact between the first terminal 21 and the second terminal 22.

[0045] Secondly, if Figure 3-5 As shown, the final product obtained by injection molding in this embodiment has a complex structure, including a first inner groove 12, a second inner groove 13, a slope 11 and a boss 14 located in the second inner groove 13, and the bottom rod 23, the top end 24 and the side end 25 of the terminal are all exposed.

[0046] See also Figure 6-20 The injection mold 3 in this embodiment includes a top plate 31, an upper mold support plate 32, an upper mold plate 33, a lower mold plate 34, a lower mold support plate 35 and a bottom plate 37 from top to bottom. An upper mold core 331 is arranged in the upper mold plate 33, a first lower mold core 341 is arranged in the lower mold plate 34, and a second lower mold core 351 is arranged in the lower mold support plate 35. The upper mold core 331, the first lower mold core 341 and the second lower mold core 351 are molded together to form a cavity for injection molding, and the terminal is fixed in the cavity during injection molding. A support plate 36 is also arranged between the bottom plate 37 and the lower mold support plate 35, and a safety groove 81 is opened on the support plate 36.

[0047] The injection mold 3 includes a driving mechanism 6 for driving the lower mold plate 34 to separate and fit with the lower mold support plate 35, a first slider mechanism 41 and a second slider mechanism 42 for fixing the top end 24 and the side end 25 during injection molding, a third slider mechanism 43 for forming the inclined surface 11 and the first inner groove 12 during injection molding, a toggle mechanism 9 arranged in the first slider mechanism 41 and the second slider mechanism 42, and a limit mechanism 7 and a safety mechanism 8. The second lower mold core 351 is provided with a slot 411 for fixing the bottom rod 23. The second lower mold core 351 is provided with a slot 411, and the lower mold plate 34 is separated from the lower mold support plate 35 by the driving mechanism 6, so that the terminal is inserted into the slot 411 through the gap between the lower mold plate 34 and the lower mold support plate 35, thereby fixing the terminal on the second lower mold core 351, and then the top end 24 and the side end 25 of the terminal are fixed respectively by the first slider mechanism 41 and the second slider mechanism 42, so that the terminal is firmly fixed in the cavity to prevent the terminal from being offset during injection molding.

[0048] And the structure of each mechanism of injection mold 3 is introduced in detail:

[0049] The horizontal height of the first slider mechanism 41 is higher than that of the second slider mechanism 42, and the horizontal height of the second slider mechanism 42 is higher than that of the third slider mechanism 43, that is, the sliding block 52 in the third slider mechanism 43 is a low slider. The first slider mechanism 41 and the third slider mechanism 43 are arranged in parallel on both sides of the terminal, and the second slider mechanism 42 is perpendicular to the first slider mechanism 41 and the third slider mechanism 43.

[0050] The first slider mechanism 41, the second slider mechanism 42 and the third slider mechanism 43 all include a fixed slide rail 51, a slide block 52 matched with the slide rail 51, a guide groove 53 provided on the slide block 52 and an inclined guide column 54 matched with the guide groove 53, and the movement of the slide block 52 is controlled by the cooperation between the inclined guide column 54 and the guide groove 53. The slide block 52 moves on the fixed slide rail 51, and the inclined guide column 54 moves in the guide groove 53. The inclined guide column 54 and the guide groove 53 can control the movement of the slide block 52, and the slide rail 51 limits the movement of the slide block 52.

[0051] The inclined guide pillars 54 of the first slider mechanism 41 and the second slider mechanism 42 are fixed on the upper mold plate 33, the inclined guide pillars 54 of the third slider mechanism 43 are fixed on the lower mold plate 34, the slide rails 51 of the first slider mechanism 41 and the second slider mechanism 42 are fixed on the lower mold plate 34, and the slide rails 51 of the third slider mechanism 43 are fixed on the lower mold bearing plate 35. The inclined direction of the inclined guide pillars 54 is that the upper end to the lower end of the inclined guide pillars 54 gradually faces the outside of the injection mold 3.

[0052] The sliding block 52 of the first slider mechanism 41 is provided with a slot 411 for fixing the top end 24 of the terminal, and the top end 24 of the terminal is inserted into the slot 411. The top end 24 of the terminal is fixed by the slot 411 on the sliding block 52 of the first slider mechanism 41. The bottom of the sliding block 52 of the first slider mechanism 41 is also provided with a matching groove 412 for matching with the lower rod of the terminal.

[0053] The sliding block 52 of the second slider mechanism 42 is provided with a fixing groove 421 for fixing the terminal side end 25, and the terminal side end 25 is inserted into the fixing groove 421. The sliding block 52 of the second slider mechanism 42 is also provided with a separation block 422 for separating the two terminal side ends 25. The side end 25 of the terminal is fixed by the fixing groove 421 on the sliding block 52 of the second slider mechanism 42, and the separation block 422 ensures that the side ends 25 of the two terminals are accurately positioned and do not touch during injection molding.

[0054] The sliding block 52 of the third slider mechanism 43 has an inclined guide surface 431 matching the inclined surface 11 of the injection molded product 1 and a protrusion 432 for forming the first inner groove 12. Other shapes and structural features of the injection molded product 1 are formed by the end of the sliding block 52 and the upper mold core 331, the first lower mold core 341 and the second lower mold core 351.

[0055] The toggle mechanism 9 is arranged corresponding to the guide groove 53. The toggle mechanism 9 is used to toggle the first slider mechanism 41 and the second slider mechanism 42 outward when the inclined guide column 54 moves upward, and to allow the inclined guide column 54 to freely enter the guide groove 53 when the inclined guide column 54 moves downward. The toggle mechanism 9 in this embodiment includes a fixing member 91 fixed on the sliding block 52, an elastic member 92 sleeved on the fixing member 91, and a paddle 93 slidably arranged on the sliding block 52, and a chamfer is arranged on the side of the paddle 93 away from the sliding block 52. The chamfer is arranged so that when the inclined guide column 54 enters the guide groove 53 from the chamfered side, the inclined guide column 54 prompts the paddle 93 to move outward, and the paddle 93 compresses the elastic member 92. When the inclined guide column 54 completely enters the guide groove 53, the paddle 93 is restored under the action of the elastic member 92, so that when the inclined guide column 54 moves upward again, the paddle 93 can drive the sliding block 52 to move outward.

[0056] The driving mechanism 6 includes a first driver 61 for driving, and a driving block 62 protruding outward is provided on the lower mold plate 34. One end of the first driver 61 is connected to the driving block 62 and is used to drive the driving block 62 to move. In a specific embodiment of the present invention, the first driver 61 is fixed on the bottom plate 37, and the output end of the first driver 61 is fixedly connected to the driving block 62, thereby driving the lower mold plate 34 to move up and down to achieve the separation and bonding between the lower mold plate 34 and the lower mold support plate 35. The first driver 61 can be set to an even number. The first driver 61 in this embodiment is set on two opposite sides of the injection mold 3. The first driver 61 can be a cylinder.

[0057] The limiting mechanism 7 includes a pull rod 71 whose upper end is fixed on the lower mold plate 34, a limiting groove 72 provided on the pull rod 71, and a limiting protrusion 73 fixed on the lower mold plate 35. The limiting protrusion 73 is used to slide in the limiting groove 72. The extending direction of the limiting groove 72 is the same as the extending direction of the pull rod 71 and the moving direction of the lower mold plate 34. A side block 84 is also provided on the side surface of the lower end of the pull rod 71 to increase the contact area between the pull rod 71 and the safety block 82 to improve safety. In this embodiment, four limiting mechanisms 7 are provided, which are respectively located on both sides of the first driver 61.

[0058] The safety mechanism 8 is used to prevent the lower mold plate 34 from falling after the lower mold plate 34 is separated from the lower mold support plate 35, and includes a safety block 82 slidably arranged in the safety groove 81, and a second driver 83 for driving the safety block 82 to move, and the second driver 83 is fixed on the support plate 36. The safety mechanism 8 in this embodiment is arranged on one of the limit mechanisms 7, and in other embodiments, multiple safety mechanisms may be selected. The second driver 83 may be a cylinder.

[0059] The working process of the injection mold 3 of this embodiment is briefly described below:

[0060] First, the mold is opened. When the mold is opened, the upper mold plate 33 is separated from the lower mold plate 34, the upper mold plate 33 moves upward, the inclined guide pillar 54 fixed on the upper mold plate 33 moves upward, and the guide grooves 53 of the first slider mechanism 41 and the second slider mechanism 42 are provided with a paddle 93. Through the cooperation of the inclined guide pillar 54 and the paddle 93, the sliding blocks 52 of the first slider mechanism 41 and the second slider mechanism 42 slide outward (move in the direction away from the injection mold 3). At this time, the upper mold core 331 is separated from the lower mold core.

[0061] After the mold opening is completed, when the first driver 61 drives the lower mold plate 34 to separate from the lower mold plate 35, the lower mold plate 34 moves upward, and the inclined guide pillar 54 of the third slider mechanism 43 moves upward, driving its sliding block 52 to retreat (move in the direction away from the injection mold 3). When the lower mold plate 34 is separated from the lower mold plate 35, the lower mold plate 34 drives the pull rod 71 to move upward, and the limiting protrusion 73 moves in the limiting groove 72. When the limiting protrusion 73 moves to the lowermost end of the limiting groove 72, the driving ends. At this time, the gap between the lower mold plate 34 and the lower mold plate 35 is the largest, so that the terminal is placed in the second lower mold core 351 through the gap.

[0062] After the lower mold plate 34 is separated from the lower mold support plate 35, when the limiting protrusion 73 moves to the lowermost end of the limiting groove 72, the second driver 83 drives the safety block 82 to move inward in the safety groove 81, so that the safety block 82 moves below the pull rod 71 to resist the bottom of the pull rod 71 to prevent the lower mold plate 34 from falling. When the terminal is placed, the second driver 83 drives the safety block 82 to withdraw from the safety groove 81, and then the first driver 61 drives the lower mold plate 34 to move downward and fit with the lower mold support plate 35.

[0063] After the terminal is fixed, the lower mold plate 34 is first fitted with the lower mold support plate 35 through the first driver 61, and the lower mold plate 34 is moved downward. When fitting, the sliding block 52 of the third slider mechanism 43 is pushed inward through the cooperation between the inclined guide column 54 of the third slider mechanism 43 and the guide groove 53. Then, the first slider mechanism 41 and the second slider mechanism are manually pushed inward, so that the top end 24 is inserted into the slot 411 of the first slider mechanism 41, and the side end 25 is inserted into the fixing groove 421 of the second slider mechanism 42, so that the bottom rod 23, the top end 24 and the side end 25 of the terminal are all fixed.

[0064] After that, the mold is closed, and the upper mold plate 33 moves downward. Since the sliding blocks 52 of the first slider mechanism 41 and the second slider mechanism 42 have moved to the predetermined position, it is not necessary to control the movement of the sliding blocks 52 through the cooperation of the inclined guide pillars 54 and the guide grooves 53. Since the paddle 93 is chamfered toward the outside of the injection mold 3, the inclined guide pillars 54 push the paddle 93 to both sides through the chamfers, and the inclined guide pillars 54 completely enter the guide grooves 53, and the sliding blocks 52 of the first slider mechanism 41 and the second slider mechanism 42 will not move. After the inclined guide pillars 54 completely enter the guide grooves 53, the paddle 93 returns to its original position under the action of the elastic member 92, so that when the mold is opened next time, the inclined guide pillars 54 can drive the sliding blocks 52 of the first slider mechanism 41 and the second slider mechanism 42 to move outward again through the paddle 93.

[0065] Under the action of the injection molding machine, the injection molding is completed, and the above actions are repeated in a cycle to complete each injection molding cycle, ensuring the stability of production and the qualified rate of products.

[0066] The injection mold of the present invention can open the injection cavity to place the terminal by setting a split lower mold core, and fix the terminal by setting a first slider mechanism and a second slider mechanism to prevent the terminal from deforming during the injection molding process, thereby improving production efficiency and ensuring the product qualification rate. The injection mold has high positioning accuracy and is easy to disassemble and assemble, and is suitable for the injection molding of two or more terminals with complex structural designs. The first driver pushes the lower template to drive the first lower mold core to move upward, completes the core pulling of the sliding block of the lower slider, i.e., the third slider mechanism, and facilitates manual insertion of the terminal. At the same time, the cylinder drives the safety block to resist the lower end of the pull rod to prevent the template from falling and achieve a stable effect. The sliding blocks of the second slider mechanism and the third slider mechanism are manually pushed inward to prompt the two sliding blocks to reset first, and the terminal is accurately positioned to ensure the product qualification rate.

[0067] Among them, the structural design of lifting the lower template through the oil cylinder can easily put the terminal in when the first lower mold core and the second lower mold core are separated enough without scratching the terminal surface coating; the sliding blocks of the second slider mechanism and the third slider mechanism are manually pushed to realize the first resetting of the two sliding blocks, and the two sliding blocks are provided with terminal positioning grooves, storage grooves and fixing grooves. After sliding resetting, the terminals are positioned to prevent the terminals from shifting during injection molding; the cylinder pushes out the safety block to press against the lower end of the pull rod to prevent the template from falling off during the injection molding process and causing safety accidents.

[0068] The present invention adds an oil cylinder and an air cylinder to the design of an ordinary embedded terminal injection product mold. The oil cylinder is used to push the template to move through the inclined guide column and the guide groove to complete the low slider core pulling (movement outside the injection mold). This design is different from the spring-opening template. The spring is easy to fail and the risk factor is greatly reduced. At the same time, the air cylinder is used to push the safety block to limit the movement of the template, which is relatively stable.

[0069] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold for preparing an injection molded product enclosing two types of terminals, characterized in that: The terminal comprises a first terminal and a second terminal, wherein the first terminal and the second terminal both comprise a bottom bar, a top end, and a side end, the height of the bottom bar of the second terminal is higher than the height of the bottom bar of the first terminal, the horizontal height of the top end of the second terminal is lower than the horizontal height of the top end of the first terminal, the endpoints of the top ends of the two terminals are located in the same vertical plane, and there is no contact between the first terminal and the second terminal; the injection molded product comprises a first inner groove, a second inner groove, an inclined surface, and a boss located in the second inner groove, and the bottom bar, the top end, and the side end of the terminal are all exposed;The injection mold includes, from top to bottom, a top plate, an upper mold support plate, an upper mold plate, a lower mold plate, a lower mold support plate and a bottom plate, an upper mold core is arranged in the upper mold plate, a first lower mold core is arranged in the lower mold plate, and a second lower mold core is arranged in the lower mold support plate. The upper mold core, the first lower mold core and the second lower mold core are molded together to form a cavity for injection molding. During injection molding, the terminal is arranged in the cavity. The injection mold also includes a driving mechanism for driving the lower mold plate to separate and fit with the lower mold support plate, and a first slider mechanism and a second slider mechanism respectively used to fix the top end and the side end during injection molding, and a first inner groove mechanism for forming an inclined surface and a first inner groove during injection molding. The third slider mechanism, the second lower mold core is provided with a slot for fixing the bottom rod, wherein the horizontal height of the first slider mechanism is higher than the horizontal height of the second slider mechanism, and the horizontal height of the second slider mechanism is higher than the horizontal height of the third slider mechanism, that is, the sliding block in the third slider mechanism is a low slider, the first slider mechanism and the third slider mechanism are arranged in parallel on both sides of the terminal, the second slider mechanism is perpendicular to the first slider mechanism and the third slider mechanism, the first slider mechanism, the second slider mechanism and the third slider mechanism all include a fixed slide rail, a sliding block matched with the slide rail, a guide groove opened on the sliding block and an inclined guide column matched with the guide groove, through the inclined guide column and the guide groove The cooperation of the first slider mechanism and the second slider mechanism controls the movement of the sliding block, the oblique guide pillars of the first slider mechanism and the second slider mechanism are fixed on the upper template, the oblique guide pillars of the third slider mechanism are fixed on the lower template, the slide rails of the first slider mechanism and the second slider mechanism are fixed on the lower template, the slide rails of the third slider mechanism are fixed on the lower mold support plate, a slot for fixing the top end of the terminal is provided on the sliding block of the first slider mechanism, the top end of the terminal is inserted into the slot, and the top end of the terminal is fixed by the slot on the sliding block of the first slider mechanism, a matching groove for matching with the terminal low rod is also provided on the bottom of the sliding block of the first slider mechanism, and a slot for fixing the side end of the terminal is provided on the sliding block of the second slider mechanism The side end of the terminal is inserted into the fixing groove, and the sliding block of the second slider mechanism is also provided with a separation block for separating the side ends of the two terminals. The side ends of the terminals are fixed by the fixing groove on the sliding block of the second slider mechanism, and the side ends of the two terminals are ensured not to contact during injection molding by the separation block. The sliding block of the third slider mechanism has an inclined guide surface matching the inclined surface of the injection molded product and a convex block for forming the first inner groove. The toggle mechanism is arranged corresponding to the guide groove, and the toggle mechanism is used to push the first slider mechanism and the second slider mechanism outward when the inclined guide column moves upward, and to allow the inclined guide column to freely enter the guide groove when the inclined guide column moves downward. ; 2. An injection mold according to claim 1, characterized in that: The driving mechanism comprises a first driver for driving, and a driving block protruding outward is arranged on the lower template, and one end of the first driver is connected to the driving block and is used to drive the driving block to move.

3. An injection mold according to claim 1, characterized in that: The injection mold includes a limiting mechanism, which includes a pull rod with an upper end fixed to the lower mold plate, a limiting groove provided on the pull rod, and a limiting protrusion fixed on the lower mold plate, the limiting protrusion is used to slide in the limiting groove, and the extension direction of the limiting groove is the same as the extension direction of the pull rod and the same as the movement direction of the lower mold plate.

4. The injection mold according to claim 1, characterized in that: The injection mold includes a safety mechanism for preventing the lower mold plate from falling after the lower mold plate is separated from the lower mold plate. A support plate is also arranged between the base plate and the lower mold plate. A safety groove is provided on the support plate. The safety mechanism includes a safety block slidably arranged in the safety groove and a second driver for driving the safety block to move. The second driver is fixed on the support plate.

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