Injection mold for a wiring terminal structure

Abstract

The utility model discloses a kind of injection mould of wiring terminal structural member, including lower mould and upper mould;The first forming groove is symmetrically provided on the lower mould;The second forming groove is symmetrically provided below the upper mould;Multiple placing grooves are equipped on the first forming groove;The second forming groove below is equipped with boss, and the boss has multiple protruding portions;The recess is equipped in the front of lower mould;Haff slider mechanism is equipped in the recess, and the moving end of Haff slider mechanism is symmetrically equipped with top-in block;The end of the top-in block is equipped with multiple insertion grooves;Ejector mechanism is equipped in the lower mould;The upper mould side is equipped with injection hole, and injection hole is internally communicated with injection pipeline.The utility model is by first placing metal conductor into placing groove, and the mode of injection molding is integrated molding, which reduces processing step, and also helps to improve product quality.

Description

Technical Field

[0001] This utility model relates to an injection mold, specifically an injection mold for a terminal block structure, and belongs to the field of mold technology. Background Technology

[0002] Terminal blocks are accessories used to achieve electrical connections, typically consisting of a metal conductor and an insulating shell. The metal part conducts current, while the insulating part ensures safety, enabling detachable connections between wires or between wires and equipment. This facilitates circuit installation, maintenance, and replacement, and they are widely used in electrical equipment, instruments, and other fields. Various molds for producing terminal blocks have been designed in the industry. For example, Chinese utility model patent CN219405241U discloses an injection mold for terminal block production, specifically including a base. Two vertical plates are symmetrically arranged on the upper end of the base, and a rotating rod is rotatably connected between the two vertical plates via bearings. A flipping motor is fixedly installed on the outer wall of one of the vertical plates. The output shaft of the flipping motor passes through the vertical plate and is fixedly connected to the rotating rod. Multiple fixing blocks are fixedly installed on the rotating rod, and a horizontal plate is fixedly connected to the upper end of the multiple fixing blocks. A lower module is fixedly installed on the upper end of the horizontal plate, and the lower module has multiple mounting slots for placing wires. An upper module that cooperates with the lower module is movably connected to the base via a vertical moving mechanism. A top-feeding mechanism is provided between the horizontal plate and the lower module. After the mold completes the production of the insulating shell for the terminal block, a subsequent process is required to insert the metal conductor into the shell. During the insertion of the metal conductor, damage or breakage of the shell may occur due to factors such as the characteristics of the shell material and assembly operations, affecting product quality and yield. Utility Model Content

[0003] The purpose of this invention is to provide an injection mold for a terminal block structure. This invention achieves one-piece molding by first placing the metal conductor into a placement groove and then performing injection molding, which reduces processing steps and helps improve product quality.

[0004] The technical solution of this utility model is as follows: An injection mold for a terminal block structure includes a lower mold and an upper mold; the lower mold has a first molding groove symmetrically arranged on it; the upper mold has a second molding groove symmetrically arranged below it, the second molding groove corresponding to the first molding groove; the first molding groove has multiple strip-shaped placement grooves; the second molding groove has a protrusion below it, the protrusion having multiple raised parts corresponding to the placement grooves; the lower mold has a groove at the front, the groove communicating with the first molding groove; the groove has a Haval slider mechanism, the moving end of the Haval slider mechanism has an ejector block symmetrically arranged, the ejector block slidingly engaging with the first molding groove; the end of the ejector block has multiple insertion grooves, the insertion grooves corresponding to the placement grooves; the lower mold has an ejector mechanism, the ejector end of the ejector mechanism communicating with the first molding groove; the upper mold has an injection hole on its side, the injection hole having an injection pipe connected inside, the injection pipe communicating with the second molding groove.

[0005] The injection mold for the aforementioned terminal block structure includes a first limiting block symmetrically arranged above the groove, forming a sliding groove between the first limiting block and the bottom surface of the groove, with a movable block slidably connected between the sliding grooves, and the movable block being fixedly connected to the ejector block; the movable block is provided with a through groove, and a rotating column is rotatably connected within the through groove; a slanted rod is provided below the upper mold, with an inclined plane parallel to it on the outer side of the slanted rod; the slanted rod extends into the through groove, and the inclined plane cooperates with the rotating column.

[0006] In the aforementioned injection mold for the terminal block structure, a second limiting block located outside the inclined rod is fixedly connected below the lower mold. The inner side of the second limiting block is provided with a mating groove, which mates with the outer side of the moving block.

[0007] The aforementioned injection mold for the terminal block structure includes an ejection mechanism comprising a movable cavity disposed at the lower end of the lower mold, wherein a base plate and multiple vertical guide rods are disposed within the movable cavity, and the base plate is slidably connected to the vertical guide rods; multiple ejection rods are disposed on the base plate; and multiple ejection slots communicating with the first forming groove are disposed through the lower mold, wherein the ejection slots cooperate with the ejection rods.

[0008] The aforementioned injection mold for the terminal block structure includes a return spring on the vertical guide rod; a connecting hole is provided at the bottom of the lower mold, and a connecting cylinder is provided inside the connecting hole, with the upper end of the connecting cylinder fixedly connected to the base plate.

[0009] The aforementioned injection mold for the terminal block structure has a third limiting block located outside the groove on the side of the lower mold, and the third limiting block has a margin groove inside.

[0010] The aforementioned injection mold for the terminal block structure has protrusions located on both sides of the insertion groove on the top insert block.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. In operation, the upper mold is connected to an external lifting device. Initially, the upper mold rises and separates from the lower mold. At this time, the metal conductor can be placed into the placement slot on the first forming groove of the lower mold, completing the pre-positioning of the metal conductor. Subsequently, the upper mold descends under the drive of the external device to close the mold. During the mold closing process, the Haver slider mechanism in the groove in front of the lower mold moves synchronously. Its moving end drives the ejector block to slide along the first forming groove, so that the insertion slot at the end of the ejector block accurately aligns with the placement slot. The outer end of the metal conductor is then inserted into the insertion slot, effectively preventing the molten plastic from covering the outer end of the metal conductor during injection molding. At the same time, the protrusion below the upper mold descends with the upper mold. The protrusion on the protrusion corresponds one-to-one with the placement slot of the first forming groove and abuts against the upper end of the metal conductor, blocking the path of the molten plastic to the rear end of the metal conductor and ensuring that both ends of the metal conductor remain exposed. At this time, the protrusion, the first forming groove, the second forming groove, and the ejector block together form a closed forming cavity, which is the forming space of the terminal insulating shell. Next, molten adhesive is injected through the injection hole on the side of the upper mold. The molten adhesive flows precisely into the molding cavity through the injection pipe connected inside the injection hole, completing the injection molding of the insulating shell. After the molten adhesive cools and solidifies, the upper mold rises to open the mold, and the ejection mechanism in the lower mold is activated. Its ejection end extends into the first molding groove, ejecting the molded terminal block from the first molding groove, completing the entire processing flow.

[0013] 2. When the Haval slider mechanism of this utility model is working, when the upper mold is driven to descend and close by an external force, the upper mold synchronously drives the inclined rod below it to move downward. The inclined rod extends into the through groove of the moving block, and its outer inclined plane contacts the rotating column rotatably connected in the through groove. As the upper mold continues to descend, the inclined plane generates a lateral thrust on the rotating column. Since the rotating column can rotate freely in the through groove, the vertical movement of the inclined rod is converted into the lateral sliding of the moving block along the slide groove formed by the first limiting block and the bottom surface of the groove, so that the moving block drives the top block to move synchronously towards the metal conductor. This rolling contact between the rotating column and the inclined plane, compared with the direct contact between surfaces in the conventional structure, transforms sliding friction into rolling friction, which can significantly reduce wear between components and extend the service life of the mechanism. Meanwhile, when the mold is closed, the inner groove of the second limiting block fixed below the lower mold fits tightly with the outer surface of the moving block. The rigid contact forms a limit on the moving block, which can effectively offset the lateral pressure generated when the molten plastic fills the molding cavity during the injection process, prevent the moving block from loosening or displacing due to force, ensure the positioning stability of the ejector block on the metal conductor, and guarantee the injection accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the bottom structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the lower mold structure;

[0017] Figure 4 This is a structural schematic diagram of the Haval slider mechanism;

[0018] Figure 5 This is a schematic diagram of the upper mold structure;

[0019] Figure 6 This is a cross-sectional view of the present invention.

[0020] The labels in the attached diagram are as follows: 1-lower mold, 2-upper mold, 3-first forming groove, 4-second forming groove, 5-placement groove, 6-protrusion, 7-protrusion, 8-groove, 9-Hafer slider mechanism, 10-ejection block, 11-insertion groove, 12-ejection mechanism, 13-injection hole, 14-injection pipe, 15-third limiting block, 16-excess groove, 17-protrusion, 50-moving cavity, 51-base plate, 52-vertical guide rod, 53-ejection rod, 54-ejection groove, 55-reset spring, 56-connecting hole, 57-connecting cylinder, 90-first limiting block, 91-slide groove, 92-moving block, 93-through groove, 94-rotating column, 95-slanted rod, 96-slanted plane, 97-second limiting block, 98-fitting groove. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0022] Example: An injection mold for a terminal block structure, the structure of which is as follows Figure 1-6 As shown, it includes a lower mold 1 and an upper mold 2; both lower mold 1 and upper mold 2 are made of S136 mold steel, and after quenching treatment, the hardness reaches HRC48-52, possessing excellent wear resistance, corrosion resistance, and polishing performance, which can ensure the smoothness of the formed surface and extend the service life of the mold. Figure 3 As shown, the lower mold 1 is symmetrically provided with first forming grooves 3; as Figure 5 As shown, a second forming groove 4 is symmetrically arranged below the upper mold 2, and the second forming groove 4 corresponds to the first forming groove 3. Figure 3 and Figure 4As shown, the first forming groove 3 has multiple strip-shaped placement grooves 5 for placing metal conductors; the second forming groove 4 has a protrusion 6 below it, which is integrally formed with the upper mold 2. The protrusion 6 has multiple protrusions 7, which correspond one-to-one with the placement grooves 5, and can tightly abut the upper end of the metal conductor when the mold is closed; the length of the metal conductor is less than the sum of the lengths of the placement groove 5 and the insertion groove 11 by 0.1 to 0.2 mm, so that after the metal conductor is placed in the insertion groove, as the push block 10 moves towards it, Its outer end is inserted into the insertion groove 11; the lower mold 1 has a groove 8 in front, which is connected to the first forming groove 3, providing installation and movement space for the Haval slider mechanism 9; the Haval slider mechanism 9 is installed in the groove 8, and the moving end of the Haval slider mechanism 9 is symmetrically provided with a top-entry block 10. The top-entry block 10 is made of 20CrMnTi alloy steel and has been carburized and quenched, with high surface hardness and good wear resistance. The top-entry block 10 slides with the first forming groove 3 to achieve lateral feeding. The top-entry block 10 has a width of 5mm on both sides. The guide protrusion of the first forming groove 3 is provided with a matching groove at the corresponding position, and the fitting clearance is controlled within 0.01-0.03mm to ensure smooth sliding and no radial wobble; the end of the ejector block 10 is provided with multiple insertion grooves 11, which correspond to the placement groove 5 and are used to position the outer end of the metal conductor; the ejector block 10 is provided with protrusions 17 on both sides of the insertion groove 11. The protrusions 17 are cylindrical structures, which can form mounting holes on both sides of the insulating shell during injection molding, facilitating the subsequent assembly of the wiring terminals; the lower mold 1 is provided with an ejection mechanism 12, and the ejection end of the ejection mechanism 12 is connected to the first forming groove 3 for the removal of the product after molding; Figure 5As shown, the upper mold 2 has an injection hole 13 on its side, and an injection pipe 14 is connected inside the injection hole 13. The injection pipe 14 is made of corrosion-resistant stainless steel, and its smooth inner wall reduces the resistance to melt flow. The injection pipe 14 is connected to the second molding groove 4 to achieve precise delivery of melt. The connection position between the injection pipe 14 and the second molding groove 4 is located at the middle of the side of the second molding groove 4 away from the metal conductor. The inlet faces the tangent direction of the inner wall of the cavity to avoid the melt directly impacting the protrusion 7 or the metal conductor, preventing positioning displacement caused by impact force, and ensuring that the melt fills evenly along the cavity wall. The upper mold 2 is connected to an external lifting device. In the initial state, the upper mold 2 is raised and separated from the lower mold 1. At this time, the metal conductor can be placed into the placement groove 5 on the first molding groove 3 of the lower mold 1, and the shape constraint of the placement groove 5 is used to complete the pre-positioning of the metal conductor. Subsequently, the upper mold 2 descends under the drive of an external device to close. During the mold closing process, the Haver slider mechanism 9 in the groove 8 in front of the lower mold 1 moves synchronously. Its moving end drives the ejector block 10 to slide along the first molding groove 3, so that the insertion groove 11 at the end of the ejector block 10 precisely aligns with the placement groove 5. The outer end of the metal conductor is then inserted into the insertion groove 11. The mechanical limit effectively prevents the molten glue from covering the outer end of the metal conductor during injection molding. At the same time, the protrusion 6 below the upper mold 2 descends with the upper mold 2. The protrusion 7 on the protrusion 6 corresponds one-to-one with the placement groove 5 of the first molding groove 3 and abuts against the upper end of the metal conductor, forming a physical barrier to block the path of molten glue to the rear end of the metal conductor, ensuring that both ends of the metal conductor remain exposed to meet the conductivity requirements. At this time, the protrusion 6, the first molding groove 3, the second molding groove 4, and the ejector block 10 together enclose a closed molding cavity, which is the molding space of the terminal insulating shell. Next, molten adhesive is injected through the injection hole 13 on the side of the upper mold 2. The molten adhesive flows into the molding cavity through the injection pipe 14, filling all corners of the molding cavity with its fluidity, thus completing the injection molding of the insulating shell. After the molten adhesive cools and solidifies, the upper mold 2 rises to open the mold, and the ejector mechanism 12 in the lower mold 1 is activated. Its ejector end extends into the first molding groove 3, and through upward thrust, it ejects the molded terminal structure from the first molding groove 3, completing the entire processing flow. Figures 3 to 5As shown, the Haval slider mechanism 9 includes a first limiting block 90 symmetrically arranged above the groove 8. The first limiting block 90 is a quenched and tempered 45# steel part with high structural rigidity. A sliding groove 91 is formed between the first limiting block 90 and the bottom surface of the groove 8. The inner wall of the sliding groove 91 is ground to ensure straightness. A moving block 92 is slidably connected between the sliding grooves 91. The moving block 92 is made of ductile iron and has good wear resistance and shock absorption. The moving block 92 and the top-entry block 10 are fixedly connected by bolts to achieve synchronous movement. The moving block 92 is provided with a through groove 93. A rotating column 94 is rotatably connected within the upper mold 93. The rotating column 94 is made of GCr15 bearing steel, and its hardness reaches HRC60-65 after quenching. It can rotate flexibly and has excellent wear resistance. A slanted rod 95 is provided below the upper mold 2. The slanted rod 95 is made of high-strength alloy steel, and its outer side has a parallel inclined plane 96. The inclined plane 96 is precision ground to ensure tilting accuracy. The slanted rod 95 extends into the through groove 93, and the inclined plane 96 rolls with the surface of the rotating column 94, so that when the slanted rod 95 moves downward, the rotating column 94 rolls along the inclined plane. A second limiting block 97 is fixedly connected below the lower mold 1, located outside the slanted rod 95. The second limiting block 97 is a cast steel part, and its inner side has a mating groove 98, which mates with the outer side of the moving block 92. When the upper mold 2 is driven to descend and close, it simultaneously moves the inclined rod 95 below it downwards. The inclined rod 95 extends into the through groove 93 of the moving block 92, and its outer inclined plane 96 contacts the rotating column 94 rotatably connected in the through groove 93. As the upper mold 2 continues to descend, the inclined plane 96 generates a lateral thrust on the rotating column 94. Since the rotating column 94 can rotate freely in the through groove 93, the vertical movement of the inclined rod 95 is converted into the lateral sliding of the moving block 92 along the slide groove 91 through friction, causing the moving block 92 to drive the ejector block 10 to move synchronously towards the metal conductor. This rolling engagement between the rotating column 94 and the inclined plane 96 significantly reduces wear between components and extends the service life of the mechanism compared to the direct contact between surfaces in conventional structures. Simultaneously, when the mold is closed, the inner mating groove 98 of the second limiting block 97 fixed below the lower mold 1 fits tightly against the outer surface of the moving block 92, forming a bidirectional limiting on the moving block 92 through rigid contact. This effectively counteracts the lateral pressure generated when the molten plastic fills the molding cavity during injection molding, preventing the moving block 92 from loosening or shifting due to force, ensuring the positioning stability of the ejector block 10 on the metal conductor, and guaranteeing injection molding accuracy. Figure 2 and Figure 6As shown, the ejection mechanism 12 includes a movable cavity 50 disposed at the lower end of the lower mold 1. The movable cavity 50 contains a base plate 51 and multiple vertical guide rods 52. The base plate 51 is made of Q235 steel plate, and the vertical guide rods 52 are made of 45# steel with a quenched and tempered surface and chrome-plated to reduce friction. The base plate 51 and the vertical guide rods 52 are slidably connected to achieve smooth lifting and lowering. Multiple ejection rods 53 are disposed on the base plate 51. The ejection rods 53 are made of Cr12MoV mold steel, which has high hardness and is not easily deformed. The ejection rods 53 are vertically fixed to the base plate 51. The lower mold 1 has multiple ejection slots 54 that communicate with the first forming slot 3; the vertical guide rod 52 is provided with a return spring 55, which is made of 65Mn spring steel and has good elastic recovery ability, and can drive the bottom plate 51 to return to its original position after ejection; the bottom of the lower mold 1 is provided with a connecting hole 56, and a connecting cylinder 57 is provided in the connecting hole 56. The upper end of the connecting cylinder 57 is fixedly connected to the bottom plate 51, and the outer end of the connecting cylinder 57 is connected to an external hydraulic cylinder to provide a stable ejection force through hydraulic transmission. During operation, the external hydraulic cylinder drives the base plate 51 upward along the vertical guide rod 52 via the connecting cylinder 57, causing the ejector rod 53 on the base plate 51 to extend from the ejector groove 54. The tip of the ejector rod 53 contacts the molded product and applies an upward thrust. This thrust overcomes the adsorption and friction between the product and the first molding groove 3, causing the product to move upward and completely separate from the first molding groove 3. After ejection, the hydraulic cylinder depressurizes, and the elastic force of the return spring 55 drives the base plate 51 and the ejector rod 53 downward to reset, awaiting the next ejection action. Figure 6 As shown, the lower mold 1 has a third limiting block 15 located outside the groove 8 on its side. The third limiting block 15 is a welded steel plate structure with high structural strength. It has an allowance groove 16 inside, the depth of which is adapted to the maximum moving distance of the moving block 92. This allows it to mechanically block the moving block 92 as it moves outward, limiting its range of movement and preventing it from falling out of the slide groove 91, thus ensuring the safety of the mechanism. Furthermore, venting grooves with a width of 8mm and a depth of 0.015mm are formed at the edges of the mold mating surfaces of the first molding groove 3 and the second molding groove 4. A 0.01-0.03mm fitting gap between the side of the ejector block 10 and the first molding groove 3 forms an auxiliary venting channel. During injection molding, air in the molding cavity can be quickly discharged through the venting grooves and fitting gap, preventing defects such as bubbles and material shortages from forming on the surface of the insulating shell.

[0023] Working principle:

[0024] In the initial state, the upper mold 2 separates from the lower mold 1, and the metal conductor is placed into the placement groove 5 of the first forming groove 3 of the lower mold 1 for pre-positioning. When the upper mold 2 descends to close, it simultaneously drives the inclined rod 95 to move downward. The inclined plane 96 of the inclined rod 95 cooperates with the rotating column 94 of the moving block 92, pushing the moving block 92 to slide along the slide groove 91, so that the insertion groove 11 of the ejector block 10 aligns with the placement groove 5, and the outer end of the metal conductor is inserted into the insertion groove 11 to avoid molten glue covering it. At the same time, the protrusion 6 of the upper mold 2 descends, and the protrusion 7 abuts against the upper end of the metal conductor, blocking the flow of molten glue to its rear, ensuring that both ends of the metal conductor are exposed. At this time, the protrusion 6, the first forming groove 3, the second forming groove 4, and the ejector block 10 enclose to form a forming cavity. Molten glue is injected through the injection hole 13 of the upper mold 2, and the molten glue flows into the forming cavity through the injection pipe 14 to complete the injection molding of the insulating shell. After the molten adhesive cools and solidifies, the upper mold 2 is raised to open the mold. The external hydraulic cylinder of the ejection mechanism 12 drives the bottom plate 51 to move upward, and the ejection rod 53 extends out from the ejection groove 54 to eject the formed terminal structure from the first forming groove 3. After ejection, the return spring 55 drives the bottom plate 51 and the ejection rod 53 to return to their original positions.

Claims

1. An injection mold for a terminal block structure, comprising a lower mold (1) and an upper mold (2); a first molding groove (3) is symmetrically arranged on the lower mold (1); a second molding groove (4) is symmetrically arranged below the upper mold (2), the second molding groove (4) corresponding to the first molding groove (3); characterized in that: The first forming groove (3) is provided with multiple strip-shaped placement grooves (5); the second forming groove (4) is provided with a protrusion (6) below, the protrusion (6) has multiple protrusions (7), the protrusions (7) correspond to the placement grooves (5); the lower mold (1) is provided with a groove (8) in front, the groove (8) is connected to the first forming groove (3); the groove (8) is provided with a Haval slider mechanism (9), the moving end of the Haval slider mechanism (9) is symmetrically provided with a top-entry block (10), the top-entry block ( 10) Sliding fit with the first molding groove (3); the end of the ejector block (10) is provided with multiple insertion grooves (11), the insertion grooves (11) correspond to the placement grooves (5); the lower mold (1) is provided with an ejector mechanism (12), the ejector end of the ejector mechanism (12) is connected to the first molding groove (3); the upper mold (2) is provided with an injection hole (13) on the side, the injection hole (13) is connected to an injection pipe (14), the injection pipe (14) is connected to the second molding groove (4).

2. The injection mold for the terminal block structure according to claim 1, characterized in that: The Haval slider mechanism (9) includes a first limiting block (90) symmetrically arranged above the groove (8), a sliding groove (91) is formed between the first limiting block (90) and the bottom surface of the groove (8), a moving block (92) is slidably connected between the sliding grooves (91), and the moving block (92) is fixedly connected to the top block (10); the moving block (92) is provided with a through groove (93), and a rotating column (94) is rotatably connected in the through groove (93); a slanted rod (95) is provided below the upper mold (2), and the outer side of the slanted rod (95) has a slanted plane (96) parallel to it; the slanted rod (95) extends into the through groove (93) and the slanted plane (96) cooperates with the rotating column (94).

3. The injection mold for the terminal block structure according to claim 2, characterized in that: The lower mold (1) is fixedly connected to a second limiting block (97) located outside the inclined rod (95). The inner side of the second limiting block (97) is provided with a mating groove (98), which is mated with the outer side of the moving block (92).

4. The injection mold for the terminal block structure according to claim 1, characterized in that: The ejection mechanism (12) includes a movable cavity (50) disposed at the lower end of the lower mold (1). The movable cavity (50) is provided with a base plate (51) and a plurality of vertical guide rods (52). The base plate (51) is slidably connected to the vertical guide rods (52). The base plate (51) is provided with a plurality of ejection rods (53). The lower mold (1) is provided with a plurality of ejection slots (54) communicating with the first forming groove (3). The ejection slots (54) cooperate with the ejection rods (53).

5. The injection mold for the terminal block structure according to claim 4, characterized in that: The vertical guide rod (52) is provided with a reset spring (55); the bottom of the lower mold (1) is provided with a connecting hole (56), and a connecting cylinder (57) is provided in the connecting hole (56). The upper end of the connecting cylinder (57) is fixedly connected to the bottom plate (51).

6. The injection mold for the terminal block structure according to claim 1, characterized in that: The lower mold (1) has a third limiting block (15) located outside the groove (8) on its side, and the third limiting block (15) has a margin groove (16) inside.

7. The injection mold for the terminal block structure according to claim 1, characterized in that: The top-insertion block (10) is provided with protrusions (17) located on both sides of the insertion groove (11).

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