Injection mold for automobile instrument panel wire harness protective sleeve

Abstract

The injection mold comprises a front mold plate, a front mold body, a rear mold body and a rear mold plate, the front mold plate is provided with a glue injection opening, and the rear mold body is provided with a first core pulling structure, a second core pulling structure, a third core pulling structure and a fourth core pulling structure; the first core-pulling structure comprises a shifting block, a first sliding block, a first core-pulling rod and a first oil cylinder, the shifting block is fixedly connected with the front mold, the end of the shifting block is located in the first sliding block and drives the sliding block to slide on the rear mold during mold opening, one end of the first core-pulling rod can enter and exit from the injection molding cavity, and the other end of the first core-pulling rod synchronously slides with the first sliding block; and a connecting groove is formed in the first sliding block. By the adoption of the technical scheme, when the straight section and the arc-shaped section are subjected to core pulling, the holding force is reduced through sliding of the sliding block, then the core pulling rod is driven to slide through the oil cylinder, a small oil cylinder can be arranged, and meanwhile the arc-shaped core pulling structure is simple, convenient and rapid.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to an injection mold for a protective sleeve for a wiring harness of an automotive dashboard. Background Technology

[0002] Wiring harness protective sleeves physically isolate the internal wires and cables from the external environment, preventing them from being worn, damp, or mechanically damaged. Automotive wiring harness protective sleeves are mainly hard sheaths made of PVC or TPU material, which have high rigidity.

[0003] As attached Figure 1 , 2 As shown, the instrument panel wiring harness protective sleeve 30 of the present invention includes a straight section 301 and an arc-shaped section 302. The straight section 301 is provided with an inclined fixing plate 303, and the fixing plate 303 is provided with fixing holes 304. Both sides of the fixing plate 303 are provided with grooves 305. The straight section 301 is relatively long, which results in a large clamping force. If a hydraulic cylinder is used directly for core pulling, a large hydraulic cylinder is required to achieve core pulling. However, the existing core pulling structure is not suitable for core pulling of the arc-shaped section. Therefore, a new injection mold is required for injection molding of this product. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides an injection mold for a protective sleeve for a vehicle dashboard wiring harness. When the straight section and the arc section are pulled out, the clamping force is reduced by the sliding of the slider first, and then the core pulling rod is driven to slide by the hydraulic cylinder. A small hydraulic cylinder can be equipped. At the same time, the arc-shaped core pulling structure is simple, convenient and quick.

[0005] The technical solution of this invention: An injection mold for a protective sleeve for a vehicle dashboard wiring harness, comprising a front mold plate, a front mold, a rear mold, mold feet, a rear mold plate, and an ejection mechanism. The front mold plate has a glue inlet, the front mold has a front mold core, and the rear mold has a rear mold core. The front and rear mold cores, when closed, form an injection cavity. The glue inlet communicates with the injection cavity. The rear mold has a first core-pulling structure, a second core-pulling structure, a third core-pulling structure, and a fourth core-pulling structure. The first core-pulling structure corresponds to a straight segment of the product. The first core-pulling structure includes a lever, a first slider, a first core-pulling rod, and a first hydraulic cylinder. The lever is fixedly connected to the front mold, and its end is located inside the first slider, driving the slider onto the rear mold during mold opening. The first core-pulling rod can slide in and out of the injection cavity at one end, and slide synchronously with the first slider at the other end. The first slider is provided with a connecting groove, and the output end of the first hydraulic cylinder is located in the connecting groove. The output end of the first hydraulic cylinder and the first slider can slide relative to each other. The second core-pulling structure corresponds to the arc segment of the product. The second core-pulling structure includes a first connecting block, a second slider, a second core-pulling rod, a first inclined guide post, a first spade base, and a second hydraulic cylinder. The first connecting block is connected to the front mold. One end of the first inclined guide post is located in the first connecting block and moves synchronously with the first connecting block. The other end is located in the first spade base so that the first inclined guide post can drive the first spade base to slide relative to the rear mold when the mold is opened. The second slider and the first spade base are sleeved on the... In addition to the second core-pulling rod, the second slider and the first shovel base can slide relative to the second core-pulling rod. The second core-pulling structure also includes a rotating plate and a gear. The rotating plate is rotatably mounted on the rear mold. The first shovel base rotates synchronously with the rotating plate and can slide relative to the rotating plate. The gear is mounted on the output shaft of the second hydraulic cylinder. The rotating plate is provided with a first arc-shaped rack that moves synchronously with it. A second arc-shaped rack is fixed on the rear mold. The first and second arc-shaped racks are located on both sides of the gear and mesh with it. When the output shaft of the second hydraulic cylinder extends or retracts, it drives the rotating plate to rotate relative to the rear mold, causing the second core-pulling rod to slide out or into the injection cavity. The third and fourth core-pulling structures are located on both sides of the fixed plate. The third core-pulling structure includes a second connecting block, a second shovel base, a second inclined guide post, a third slider, and a first core-pulling block. The second connecting block is fixedly connected to the front mold. One end of the second inclined guide post is located inside the second connecting block and moves synchronously with the second connecting block. The other end of the second inclined guide post is located inside the second shovel base. One end of the third slider is connected to the second shovel base, and the other end is connected to the first core-pulling block. The side of the third slider connected to the first core-pulling block is inclined. The fourth core-pulling structure includes a third connecting block, a third inclined guide post, and a third shovel base. The second core-pulling block is provided on the third shovel base. One end of the third inclined guide post is located inside the third connecting block and moves synchronously with the third connecting block. The other end of the third inclined guide post is located inside the third shovel base.

[0006] Using the above technical solution, during mold opening, the front mold moves relative to the rear mold, driving the pry block, connecting blocks, and inclined guide pillars to move. The pry block drives the first slider to slide relative to the rear mold and simultaneously drives the first core-pulling rod to slide towards the first hydraulic cylinder, reducing the clamping force between the first core-pulling rod and the product. When the first slider slides, the first hydraulic cylinder does not operate. After the output shaft end of the first hydraulic cylinder abuts against the connecting groove on the first slider, the first hydraulic cylinder starts working. The output shaft of the first hydraulic cylinder first slides relative to the first slider. After contacting the other side wall of the connecting groove at the end of the first output shaft, the output shaft of the first hydraulic cylinder drives the first slider and the first core-pulling rod to slide, causing the first core-pulling rod to disengage from the injection cavity, completing the core-pulling action in the straight section. The second core-pulling rod drives the first shovel base to slide on the rotating plate, carrying... The second slider slides, causing it to disengage from the injection cavity. The second hydraulic cylinder then operates, driving the rotating plate to rotate and moving the first shovel base and the second slider. The second core-pulling rod disengages from the injection cavity, completing the core-pulling action of the arc segment. The third and fourth inclined guide pillars drive the second and third shovel bases to move in opposite directions, respectively. Driven by the second shovel base, the third slider moves towards the outside of the injection cavity, simultaneously driving the first core-pulling block to move outward and towards the rear mold. The sliding of the third shovel base drives the second core-pulling block to move, completing the core-pulling action of the fixed plate. During core-pulling in both the straight and arc segments, the clamping force is reduced first, and then the complete core-pulling is performed by the hydraulic cylinder. This eliminates the need for a large hydraulic cylinder, effectively reducing costs and allowing for a smaller overall structure of the injection mold.

[0007] A further feature of the present invention is that the first slider has a first groove, the side wall of the first groove is inclined, the push block has an inclined protrusion, the inclined protrusion is located in the first groove and abuts against the inclined wall of the first groove, so that when the push block slides, it drives the first slider to slide relative to the rear mold and the first oil cylinder.

[0008] With the above-mentioned further configuration, the pusher block moves with the front mold when the mold is opened, and due to the setting of the inclined protrusion and inclined wall, it will push the first slider to move towards the first oil cylinder, so that the first core-pulling rod will loosen from the product first, which will facilitate subsequent core pulling and avoid sticking.

[0009] A further feature of the present invention is that the rotating plate is provided with a fixed seat, the fixed seat is located outside the first shovel base, the fixed seat is provided with a square guide hole, the outer end of the second core-pulling rod is square and is slidably disposed in the square guide hole, and the outer end of the second core-pulling rod is provided with a limiting block, which abuts against the outer end surface of the fixed seat when the mold is closed.

[0010] With the above-mentioned further configuration, when the first shovel base and the second slider slide, the second core-pulling rod slides relative to the fixed seat. When the second hydraulic cylinder works and drives the rotating plate to rotate, due to the square guide hole and the square configuration of the second core-pulling rod, the second core-pulling rod is driven to move synchronously with the rotating plate, which facilitates the second core-pulling rod to disengage from the arc section of the product and complete the core pulling. The setting of the limiting block ensures that when the mold is closed, the limiting block contacts the fixed seat, which indicates that the mold is closed in place, and avoids the second core-pulling rod from excessively extending into the injection cavity, which would affect the injection molding effect.

[0011] A further embodiment of the present invention includes: a first arc-shaped plate, a second arc-shaped plate, and a third arc-shaped plate on the rear mold; the first arc-shaped plate and the second arc-shaped plate are spaced apart to form a first arc-shaped guide groove; a guide block is provided on the rotating plate; the guide block slides within the first arc-shaped guide groove; first anti-detachment blocks are provided on both sides of the guide block; the first anti-detachment blocks are located below the first and second arc-shaped plates; a second arc-shaped guide groove is provided on the third arc-shaped plate; a guide rod is provided on the output shaft of the second hydraulic cylinder; a gear is rotatably mounted on the guide rod; the lower end of the guide rod is T-shaped; the guide rod slides within the second arc-shaped guide groove; a gap is provided between the bottom surface of the second arc-shaped guide groove and the rear mold; and the lower end of the guide rod is located at the gap.

[0012] With the above-mentioned further design, the arc-shaped guide groove can guide the rotation of the rotating plate, making the structure stable and non-deviational during rotation. The setting of the first anti-detachment block and the T-shaped setting of the lower end of the guide rod prevent the guide block and guide rod from slipping out of the corresponding arc-shaped guide groove when they slide in the corresponding arc-shaped guide groove, thus affecting the core pulling.

[0013] A further provision of the present invention includes: a fourth arc-shaped plate fixedly mounted on the third arc-shaped plate, a third arc-shaped guide groove on the fourth arc-shaped plate, a guide rod sliding within the third arc-shaped guide groove, and a gear and a second arc-shaped rack located between the third arc-shaped plate and the fourth arc-shaped plate.

[0014] The above-mentioned further design further guides the guide rod and limits the gear to prevent it from shaking and affecting the movement of the rotating plate.

[0015] The present invention is further provided in that: the rotating plate is provided with limiting seats on both sides of the first shovel base, the first shovel base slides between the two limiting seats, the limiting seats and the rotating plate are spaced apart to form a second sliding groove, the first shovel base is provided with a second anti-detachment block, and the second anti-detachment block slides in the second sliding groove.

[0016] By adopting the above-mentioned further configuration, it can not only guide the sliding of the first shovel base, but also drive the first shovel base and the second slider to rotate synchronously when the rotating plate rotates, so as to drive the second core-pulling rod to detach from the product and complete the core-pulling action. The second anti-detachment block can prevent the first shovel base from detaching from the rotating plate when sliding.

[0017] A further provision of the present invention includes: a first injection block fixedly disposed on the front mold core, a second injection block fixedly disposed on the rear mold core, the first injection block and the second injection block being disposed opposite to each other, and a semi-circular groove being disposed on the opposite surfaces of the first injection block and the second injection block, with a threaded section disposed in the semi-circular groove.

[0018] With the above-mentioned further configuration, the straight section can be threaded. When the mold opens, the first injection block moves with the front mold core and separates from the second injection block, which facilitates the ejection of subsequent products.

[0019] The invention further includes the following: the rear mold is provided with a fifth core-pulling structure located between the first core-pulling structure and the second core-pulling structure. The fifth core-pulling structure includes a fourth slider and a third core-pulling block. The third core-pulling block is disposed on the fourth slider. The fourth slider is connected to the second shovel base. The side of the fourth slider connected to the third core-pulling block is inclined so that when the fourth slider slides, the third core-pulling block slides obliquely downward relative to the fourth slider.

[0020] With the above-mentioned further configuration, the fifth core-pulling structure can process the holes in the straight section. When the mold is opened, the second shovel base slides outward under the action of the second inclined guide post, which drives the fourth slider to slide. Due to the inclined configuration, the third core-pulling block can slide downward relative to the fourth slider, so that the third core-pulling block is separated from the injection cavity, avoiding the third core-pulling block from sticking to the product, and facilitating the ejection of the product in the future.

[0021] A further feature of the present invention is that the first core-pulling rod is provided with a cooling water channel, which is arranged in a spiral shape.

[0022] With the above-mentioned further configuration, due to the relatively long straight section, a cooling water channel is set up to cool the first core-pulling rod. The spiral cooling water channel extends continuously along the axial direction of the core-pulling rod, which can fully cover the circumferential and axial areas of the core-pulling rod. This allows the coolant to form a uniform heat exchange contact with the inner wall of the core-pulling rod during the flow process, effectively avoiding the local cooling blind spots that exist in conventional straight water channels. This reduces the thermal stress caused by excessive local temperature differences in the core-pulling rod, prevents thermal deformation such as bending and warping of the core-pulling rod, and ensures the structural accuracy and motion stability of the core-pulling rod. Compared with a straight flow channel of the same length, the spiral flow channel structure can significantly extend the flow path and residence time of the coolant inside the core-pulling rod, greatly increasing the heat exchange area and heat exchange time between the coolant and the core-pulling rod.

[0023] A further embodiment of the present invention is provided: the ejection mechanism includes an ejector plate and a plurality of ejector pins, each ejector pin being located on the ejector plate and moving synchronously with the ejector plate, and the end of each ejector pin extending into the injection molding cavity.

[0024] With the above-mentioned further configuration, the ejector pins correspond to the straight section and the arc section. The ejector plate moves towards the rear mold core, driving the ejector pins into the rear mold core and contacting the product. The product is ejected from the rear mold core with good stability, avoiding deviation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a wire harness protective sleeve. Figure 2 This is a schematic diagram of the bottom of the wire harness protective sleeve; Figure 3 This is a schematic diagram of an injection mold according to a specific embodiment of the present invention; Figure 4 This is a schematic diagram showing the positions of each core-pulling structure in a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the first core-pulling structure according to a specific embodiment of the present invention; Figure 6 This is a schematic diagram of the circulating water circuit according to a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the toggle block in a specific embodiment of the present invention; Figure 8 This is a schematic diagram of the second core-pulling structure according to a specific embodiment of the present invention; Figure 9 This is a schematic diagram of a gear and an arc-shaped rack according to a specific embodiment of the present invention; Figure 10 This is a schematic diagram of the rotating plate according to a specific embodiment of the present invention; Figure 11 This is a schematic diagram showing the positions of the third and fourth core-pulling structures in a specific embodiment of the present invention; Figure 12 This is a schematic diagram of the third core-pulling structure in a specific embodiment of the present invention; Figure 13 This is a structural diagram of the second shovel base according to a specific embodiment of the present invention; Figure 14 This is a schematic diagram of the third core-pulling block in a specific embodiment of the present invention; Figure 15 This is a schematic diagram showing the position of the ejector structure in a specific embodiment of the present invention; Figure 16 This is a schematic diagram showing the position of the ejector pin in a specific embodiment of the present invention.

[0026] In the diagram, 1. Front mold plate; 11. Injection port; 2. Front mold; 21. Front mold core; 211. First injection block; 3. Rear mold; 31. Rear mold core; 311. Second injection block; 312. Semicircular groove; 32. First arc plate; 33. Second arc plate; 34. Third arc plate; 341. Second arc guide groove; 35. First arc guide groove; 36. Fourth arc plate; 361. Third arc guide groove; 4. Mold foot; 5. Rear mold plate; 6. Ejection mechanism; 61. Ejector plate; 62. Ejector pin; 7. First core-pulling structure; 71. Pulley block; 711. Inclined protrusion; 72. First slider; 721. Connecting groove; 722. First sliding groove; 73. First core-pulling rod; 731. Cooling water channel; 74. First oil cylinder; 8. Second core-pulling structure; 81. First connecting block; 82. Second slider; 83. Second core-pulling rod; 831. Limiting block; 84. First inclined guide post; 85. First shovel base; 86. Second oil cylinder; 861. Guide rod; 87. Rotating plate; 870. First arc-shaped rack; 871. Fixing seat; 873. Guide block; 874. First anti-detachment block; 875. Limiting seat; 88. Gear; 89. Second arc-shaped rack; 90. Third core-pulling structure; 91. Second connecting block; 92. Second shovel base; 93. Second inclined guide post; 94. Third slider; 95. First core-pulling block; 10. Fourth core-pulling structure; 101. Third connecting block; 102. Third inclined guide post; 103. Third shovel base; 104. Second core-pulling block; 20. Fifth core-pulling structure; 201. Fourth slider; 202. Third core-pulling block; 30. Protective sleeve; 301. Straight segment; 302. Arc segment; 303. Fixing plate; 304. Fixing hole; 305. Groove. Detailed Implementation

[0027] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that in the description of this invention, all directional indications (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0029] Furthermore, in this invention, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0031] like Figure 1-16As shown, an injection mold for a protective sleeve for a vehicle dashboard wiring harness includes a front mold plate 1, a front mold 2, a rear mold 3, mold feet 4, a rear mold plate 5, and an ejection mechanism 6. The front mold plate 1 has a glue injection port 11, the front mold 2 has a front mold core 21, and the rear mold 3 has a rear mold core 31. After the front mold core 21 and the rear mold core 31 are closed, they form an injection cavity. The glue injection port 11 communicates with the injection cavity. The rear mold 3 has a first core-pulling structure 7, a second core-pulling structure 8, a third core-pulling structure 9, and a fourth core-pulling structure 10. The first core-pulling structure 7 corresponds to the straight segment 301 of the product. The first core-pulling structure 7 includes a pry block 71, a first slider 72, a first core-pulling rod 73, and a first hydraulic cylinder 74. The pry block 71 is fixedly connected to the front mold 2. The end is located inside the first slider 72 and drives the first slider 72 to slide on the rear mold 3 when the mold opens. One end of the first core-pulling rod 73 can enter and exit the injection cavity, and the other end slides synchronously with the first slider 72. The first slider 72 is provided with a connecting groove 721. The output end of the first hydraulic cylinder 74 is located in the connecting groove 721, and the output end of the first hydraulic cylinder 74 can slide relative to the first slider 72. The second core-pulling structure 8 corresponds to the arc segment 302 of the product. The second core-pulling structure 8 includes a first connecting block 81, a second slider 82, a second core-pulling rod 83, a first inclined guide post 84, a first shovel base 85, and a second hydraulic cylinder 86. The first connecting block 81 is connected to the front mold 2. One end of the first inclined guide post 84 is located inside the first connecting block 81 and is connected to the first connecting block 86. The connecting block 81 moves synchronously, with its other end located inside the first shovel base 85. During mold opening, the first inclined guide post can drive the first shovel base 85 to slide relative to the rear mold 3. The second slider 82 and the first shovel base 85 are sleeved outside the second core-pulling rod 83, and the second slider 82 and the first shovel base 85 can slide relative to the second core-pulling rod 83. The second core-pulling structure 8 also includes a rotating plate 87 and a gear 88. The rotating plate 87 is rotatably mounted on the rear mold 3. The first shovel base 85 rotates synchronously with the rotating plate 87 and can slide relative to the rotating plate 87. The gear 88 is mounted on the output shaft of the second hydraulic cylinder 86. The rotating plate 87 is provided with a first arc-shaped rack 870 that moves synchronously with it. The rear mold 3 is fixedly provided with a second arc-shaped rack 89. The first arc-shaped rack 870 and the second arc-shaped rack 89... Strips 89 are located on both sides of gear 88 and mesh with gear 88. When the output shaft of the second cylinder 86 extends or retracts, it drives the rotating plate 87 to rotate relative to the rear mold 3, causing the second core-pulling rod 83 to slide out or into the injection cavity. The third core-pulling structure 9 and the fourth core-pulling structure 10 are located on both sides of the fixed plate 303. The third core-pulling structure 9 includes a second connecting block 91, a second shovel base 92, a second inclined guide post 93, a third slider 94, and a first core-pulling block 95. The second connecting block 91 is fixedly connected to the front mold 2. One end of the second inclined guide post 93 is located inside the second connecting block 91 and moves synchronously with the second connecting block 91. The other end of the second inclined guide post 93 is located inside the second shovel base 92. One end of the third slider 94 is connected to the second shovel base 92.The other end is connected to the first core-pulling block 95, and the third slider 94 is inclined on the side connected to the first core-pulling block 95. The fourth core-pulling structure 10 includes a third connecting block 101, a third inclined guide post 102, and a third shovel base 103. A second core-pulling block 104 is provided on the third shovel base 103. One end of the third inclined guide post 102 is located inside the third connecting block 101 and moves synchronously with the third connecting block 101. The other end of the third inclined guide post 102 is located inside the third shovel base 103. When the mold is opened, the front mold 2 moves relative to the rear mold 3, driving the pusher block 71, each connecting block, and the inclined guide post. The movement is initiated by the pusher block 71, which drives the first slider 72 to slide relative to the rear mold 3, and simultaneously drives the first core-pulling rod 73 to slide towards the first hydraulic cylinder 74, reducing the clamping force between the first core-pulling rod 73 and the product. When the first slider 72 slides, the first hydraulic cylinder 74 is not in operation. After the output shaft end of the first hydraulic cylinder 74 abuts against the connecting groove 721 on the first slider 72, the first hydraulic cylinder 74 begins to operate. The output shaft of the first hydraulic cylinder 74 first slides relative to the first slider 72, and after contacting the other side wall of the connecting groove 721 at the end of the first output shaft, the output shaft of the first hydraulic cylinder 74... The output shaft drives the first slider 72 and the first core-pulling rod 73 to slide, causing the first core-pulling rod 73 to disengage from the injection molding chamber, completing the core-pulling action of the straight segment 301. The second core-pulling rod 83 drives the first spade base 85 to slide on the rotating plate 87, causing the second slider 82 to slide, causing the second slider 82 to disengage from the injection molding chamber. The second hydraulic cylinder 86 operates, driving the rotating plate 87 to rotate, and causing the first spade base 85 and the second slider 82 to move. The second core-pulling rod 83 disengages from the injection molding chamber, completing the core-pulling action of the arc segment 302. The third inclined guide post 102 and the fourth inclined guide post respectively... The second shovel base 92 and the third shovel base 103 are driven to move in opposite directions. Driven by the second shovel base 92, the third slider 94 moves towards the outside of the injection cavity, simultaneously driving the first core-pulling block 95 to move outwards and also towards the rear mold 3. The sliding motion of the third shovel base 103 drives the second core-pulling block 104 to move, completing the core-pulling action of the fixed plate 303. During core pulling in both the straight and curved sections of 302, the clamping force is first reduced, and then the complete core pulling is performed by hydraulic cylinder drive. This eliminates the need for a large hydraulic cylinder, effectively reducing costs and allowing for a smaller overall structure of the injection mold.

[0032] The first slider 72 has a first groove 722, and the sidewall of the first groove 722 is inclined. The push block 71 has an inclined protrusion 711, which is located in the first groove 722 and abuts against the inclined wall of the first groove 722. When the push block 71 slides, it drives the first slider 72 to slide relative to the rear mold 3 and the first hydraulic cylinder 74. When the mold is opened, the push block 71 moves with the front mold 2, and due to the setting of the inclined protrusion 711 and the inclined wall, it pushes the first slider 72 to move towards the first hydraulic cylinder 74, so that the first core-pulling rod 7... 3. First, loosen the core with the product to facilitate subsequent core pulling and avoid adhesion; the first injection block 211 is fixedly provided on the front mold core 21, and the second injection block 311 is fixed on the rear mold core 31. The first injection block 211 and the second injection block 311 are arranged opposite to each other, and a semi-circular groove 312 is provided on the opposite surface of the first injection block 211 and the second injection block 311. A threaded section is provided in the semi-circular groove 312, which can be used to perform thread processing on the straight section. When the mold is opened, the first injection block 211 moves with the front mold core 21 and separates from the second injection block 311, which facilitates the subsequent ejection of the product.

[0033] The rotating plate 87 is provided with a fixed seat 871, which is located outside the first shovel base 85. The fixed seat 871 is provided with a square guide hole. The outer end of the second core-pulling rod 83 is square and slides within the square guide hole. The outer end of the second core-pulling rod 83 is provided with a limiting block 831. When the mold is closed, the limiting block 831 abuts against the outer end face of the fixed seat 871. When the first shovel base 85 and the second slider 82 slide, the second core-pulling rod 83 is relative to the fixed seat 87. 1. When the second hydraulic cylinder 86 operates, driving the rotating plate 87 to rotate, the square guide hole and the square arrangement of the second core-pulling rod 83 drive the second core-pulling rod 83 to move synchronously with the rotating plate 87, which facilitates the second core-pulling rod 83 to disengage from the arc-shaped section 302 of the product and complete the core pulling. The setting of the limiting block 831 ensures that when the mold is closed, the limiting block 831 contacts the fixed seat 871, which indicates that the mold is closed in place, and avoids the second core-pulling rod 83 from excessively extending into the injection cavity and affecting the injection molding effect.

[0034] The rear mold 3 is further provided with a first arc-shaped plate 32, a second arc-shaped plate 33, and a third arc-shaped plate 34. The first arc-shaped plate 32 and the second arc-shaped plate 33 are spaced apart to form a first arc-shaped guide groove 35. The rotating plate 87 is provided with a guide block 873, which slides within the first arc-shaped guide groove 35. First anti-detachment blocks 874 are located on both sides of the guide block 873, below the first arc-shaped plate 32 and the second arc-shaped plate 33. The third arc-shaped plate 34 is provided with a second arc-shaped guide groove 341. A guide rod 861 is provided on the output shaft of the second hydraulic cylinder 86. A gear 88 is rotatably mounted on the guide rod 861. The lower end of the guide rod 861 is T-shaped and slides within the second arc-shaped guide groove 341. A gap is provided between the bottom surface of the second arc-shaped guide groove 341 and the rear mold 3. The lower end of 861 is located at the gap. The arc-shaped guide groove can guide the rotation of the rotating plate 87, making the structure stable and non-deviation during rotation. The setting of the first anti-detachment block 874 and the T-shaped setting of the lower end of the guide rod 861 prevent the guide block 873 and the guide rod 861 from slipping out of the corresponding arc-shaped guide groove when they slide in the corresponding arc-shaped guide groove, which would affect the core pulling. A fourth arc-shaped plate 36 is fixed on the third arc-shaped plate 34. The fourth arc-shaped plate 36 is provided with a third arc-shaped guide groove 361. The guide rod 861 slides in the third arc-shaped guide groove 361. The gear 88 and the second arc-shaped rack 89 are located between the third arc-shaped plate 34 and the fourth arc-shaped plate 36, which further guides the guide rod 861 and can also limit the gear 88 to prevent it from shaking and affecting the movement of the rotating plate 87.

[0035] The rotating plate 87 is provided with limiting seats 875 on both sides of the first shovel base 85. The first shovel base 85 slides between the two limiting seats 875. The limiting seats 875 and the rotating plate 87 are spaced apart to form a second sliding groove. The first shovel base 85 is provided with a second anti-detachment block. The second anti-detachment block slides in the second sliding groove. It can guide the sliding of the first shovel base 85 and drive the first shovel base 85 and the second slider 82 to rotate synchronously when the rotating plate 87 rotates, so as to drive the second core-pulling rod 83 to detach from the product and complete the core-pulling action. The second anti-detachment block can prevent the first shovel base 85 from detaching from the rotating plate 87 when sliding.

[0036] The rear mold 3 is further provided with a fifth core-pulling structure 20 located between the first core-pulling structure 7 and the second core-pulling structure 8. The fifth core-pulling structure 20 includes a fourth slider 201 and a third core-pulling block 202. The third core-pulling block 202 is disposed on the fourth slider 201. The fourth slider 201 is connected to the second spade base 92. The side of the fourth slider 201 connected to the third core-pulling block 202 is inclined so that when the fourth slider 201 slides, the third core-pulling block 202 slides obliquely downward relative to the fourth slider 201. The fifth core-pulling structure 20 can process the holes in the straight section. When the mold is opened, the second spade base 92 slides outward under the action of the second inclined guide post 93, driving the fourth slider 201 to slide. Due to the inclined setting, the third core-pulling block 202 can slide downward relative to the fourth slider 201, so that the third core-pulling block 202 is separated from the injection cavity, avoiding the third core-pulling block 202 from sticking to the product, and facilitating the ejection of the product in the future.

[0037] The first core-pulling rod 73 is provided with a cooling water channel 731, which is spirally arranged. The first slider 72 is also provided with inlet and outlet water channels on both sides, which are connected to the cooling water channel 731. Due to the long straight section, the cooling water channel 731 is provided to cool the first core-pulling rod 73. The spiral cooling water channel 731 extends continuously in a spiral shape along the axial direction of the core-pulling rod, which can cover the circumferential and axial areas of the core-pulling rod in all directions. This allows the coolant to form a uniform heat exchange contact with the inner wall of the core-pulling rod during the flow process, effectively avoiding the local cooling blind spots that exist in conventional straight water channels, reducing the thermal stress caused by excessive local temperature difference in the core-pulling rod, preventing the core-pulling rod from bending, warping and other thermal deformations, and ensuring the structural accuracy and motion stability of the core-pulling rod. Compared with a straight water channel of the same length, the spiral flow channel structure can significantly extend the flow path and residence time of the coolant inside the core-pulling rod, greatly increasing the heat exchange area and heat exchange time between the coolant and the core-pulling rod.

[0038] The ejection mechanism 6 includes an ejector plate 61 and a plurality of ejector pins 62. Each ejector pin 62 is located on the ejector plate 61 and moves synchronously with the ejector plate 61. The end of each ejector pin 62 extends into the injection cavity. The ejector pin 62 corresponds to the straight section and the arc section 302. The ejector plate 61 moves toward the rear mold core 31, driving the ejector pin 62 into the rear mold core 31 and into contact with the product, thus ejecting the product out of the rear mold core 31. The product is stable during ejection and avoids deviation. The specific working principle of the ejection mechanism 6 is existing technology, so it will not be described in detail here.

Claims

1. An injection mold for a protective sleeve for a vehicle dashboard wiring harness, characterized in that, The system includes a front mold plate (1), a front mold (2), a rear mold (3), mold feet (4), a rear mold plate (5), and an ejection mechanism (6). The front mold plate (1) is provided with a glue injection port (11), the front mold (2) is provided with a front mold core (21), and the rear mold (3) is provided with a rear mold core (31). The front mold core (21) and the rear mold core (31) form an injection cavity after being closed. The glue injection port (11) communicates with the injection cavity. The rear mold (3) is provided with a first core-pulling structure (7), a second core-pulling structure (8), a third core-pulling structure (9), and a fourth core-pulling structure (10). The first core-pulling structure (7) corresponds to the straight segment (301) of the product. The first core-pulling structure (7) includes a push block (71), a first slider (72), and a first... The core-pulling rod (73) and the first hydraulic cylinder (74) are provided. The push block (71) is fixedly connected to the front mold (2). The end of the push block (71) is located in the first slider (72) and drives the first slider (72) to slide on the rear mold (3) when the mold is opened. One end of the first core-pulling rod (73) can enter and exit the injection cavity, and the other end slides synchronously with the first slider (72). The first slider (72) is provided with a connecting groove (721). The output end of the first hydraulic cylinder (74) is located in the connecting groove (721), and the output end of the first hydraulic cylinder (74) can slide relative to the first slider (72). The second core-pulling structure (8) corresponds to the arc segment (302) of the product. The second core-pulling structure (8) includes a first connecting block (81) and a second connecting block (84). The system comprises a slider (82), a second core-pulling rod (83), a first inclined guide post (84), a first shovel base (85), and a second hydraulic cylinder (86). The first connecting block (81) is connected to the front mold (2). One end of the first inclined guide post (84) is located inside the first connecting block (81) and moves synchronously with the first connecting block (81). The other end is located inside the first shovel base (85) so that the first inclined guide post (84) can drive the first shovel base (85) to slide relative to the rear mold (3) when the mold is opened. The second slider (82) and the first shovel base (85) are sleeved on the outside of the second core-pulling rod (83), and the second slider (82) and the first shovel base (85) can slide relative to the second core-pulling rod (83). The second core-pulling structure (8) also includes a rotating plate (87) and a hydraulic cylinder (86). The gear (88) is rotatably mounted on the rear mold (3). The first shovel base (85) rotates synchronously with the rotating plate (87) and can slide relative to the rotating plate (87). The gear (88) is mounted on the output shaft of the second cylinder (86). The rotating plate (87) is provided with a first arc-shaped rack (870) that moves synchronously with it. The rear mold (3) is fixedly provided with a second arc-shaped rack (89). The first arc-shaped rack (870) and the second arc-shaped rack (89) are located on both sides of the gear (88) and mesh with the gear (88) so that when the output shaft of the second cylinder (86) extends or retracts, it drives the rotating plate (87) to rotate relative to the rear mold (3), thereby driving the second core-pulling rod (83) to slide out or slide into the injection cavity.The third core-pulling structure (9) and the fourth core-pulling structure (10) are located on both sides of the fixed plate (303). The third core-pulling structure (9) includes a second connecting block (91), a second shovel base (92), a second inclined guide post (93), a third slider (94), and a first core-pulling block (95). The second connecting block (91) is fixedly connected to the front mold (2). One end of the second inclined guide post (93) is located inside the second connecting block (91) and moves synchronously with the second connecting block (91). The other end of the second inclined guide post (93) is located inside the second shovel base (92). One end of the third slider (94) is connected to the first core-pulling block (95). The second shovel base (92) is connected to the first core-pulling block (95) at one end, and the third slider (94) is inclined on the side connected to the first core-pulling block (95). The fourth core-pulling structure (10) includes a third connecting block (101), a third inclined guide post (102), and a third shovel base (103). The third shovel base (103) is provided with a second core-pulling block (104). One end of the third inclined guide post (102) is located inside the third connecting block (101) and moves synchronously with the third connecting block (101). The other end of the third inclined guide post (102) is located inside the third shovel base (103).

2. The injection mold for the automotive dashboard wiring harness protective sleeve according to claim 1, characterized in that, The first slider (72) is provided with a first groove (722), the side wall of the first groove (722) is inclined, the push block (71) is provided with an inclined protrusion (711), the inclined protrusion (711) is located in the first groove (722) and abuts against the inclined wall of the first groove (722), so that when the push block (71) slides, it drives the first slider (72) to slide relative to the rear mold (3) and the first oil cylinder (74).

3. The injection mold for the automotive dashboard wiring harness protective sleeve according to claim 1 or 2, characterized in that, The rotating plate (87) is provided with a fixed seat (871), which is located on the outside of the first shovel base (85). The fixed seat (871) is provided with a square guide hole. The outer end of the second core-pulling rod (83) is square and slides in the square guide hole. The outer end of the second core-pulling rod (83) is provided with a limiting block (831). When the mold is closed, the limiting block (831) abuts against the outer end face of the fixed seat (871).

4. The injection mold for the automotive dashboard wiring harness protective sleeve according to claim 1 or 2, characterized in that, The rear mold (3) is further provided with a first arc-shaped plate (32), a second arc-shaped plate (33), and a third arc-shaped plate (34). The first arc-shaped plate (32) and the second arc-shaped plate (33) are separated to form a first arc-shaped guide groove (35). The rotating plate (87) is provided with a guide block (873). The guide block (873) slides in the first arc-shaped guide groove (35). The guide block (873) is provided with a first anti-detachment block (874) on both sides. The first anti-detachment block (874) is located on the first arc-shaped plate (32). Below the second arc plate (33), the third arc plate (34) is provided with a second arc guide groove (341), the output shaft of the second oil cylinder (86) is provided with a guide rod (861), the gear (88) is rotatably mounted on the guide rod (861), the lower end of the guide rod (861) is T-shaped, the guide rod (861) slides in the second arc guide groove (341), the bottom surface of the second arc guide groove (341) is provided with a gap between it and the rear mold (3), and the lower end of the guide rod (861) is located at the gap.

5. The injection mold for the automotive dashboard wiring harness protective sleeve according to claim 4, characterized in that, A fourth arc plate (36) is fixedly provided on the third arc plate (34). A third arc guide groove (361) is provided on the fourth arc plate (36). The guide rod (861) slides in the third arc guide groove (361). The gear (88) and the second arc rack (89) are located between the third arc plate (34) and the fourth arc plate (36).

6. The injection mold for the automotive dashboard wiring harness protective sleeve according to claim 1 or 2, characterized in that, The rotating plate (87) is provided with limiting seats (875) on both sides of the first shovel base (85). The first shovel base (85) slides between the two limiting seats (875). The limiting seats (875) and the rotating plate (87) are spaced apart to form a second sliding groove. The first shovel base (85) is provided with a second anti-detachment block, which slides in the second sliding groove.

7. The injection mold for the automotive dashboard wiring harness protective sleeve according to claim 1 or 2, characterized in that, The front mold core (21) is fixedly provided with a first injection block (211), and the rear mold core (31) is fixed with a second injection block (311). The first injection block (211) and the second injection block (311) are arranged opposite to each other, and a semi-circular groove (312) is provided on the opposite surface of the first injection block (211) and the second injection block (311). A threaded section is provided in the semi-circular groove (312).

8. The injection mold for the automotive dashboard wiring harness protective sleeve according to claim 1 or 2, characterized in that, The rear mold (3) is also provided with a fifth core-pulling structure (20) located between the first core-pulling structure (7) and the second core-pulling structure (8). The fifth core-pulling structure (20) includes a fourth slider (201) and a third core-pulling block (202). The third core-pulling block (202) is located on the fourth slider (201). The fourth slider (201) is connected to the second shovel base (92). The side of the fourth slider (201) connected to the third core-pulling block (202) is inclined so that when the fourth slider (201) slides, the third core-pulling block (202) slides obliquely downward relative to the fourth slider (201).

9. The injection mold for the automotive dashboard wiring harness protective sleeve according to claim 1 or 2, characterized in that, The first core-pulling rod (73) is provided with a cooling water channel (731), which is arranged in a spiral shape.

10. The injection mold for the automotive dashboard wiring harness protective sleeve according to claim 1 or 2, characterized in that, The ejection mechanism (6) includes an ejector plate (61) and a plurality of ejector pins (62). Each ejector pin (62) is located on the ejector plate (61) and moves synchronously with the ejector plate (61). The end of each ejector pin (62) extends into the injection molding cavity.

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