Long plastic connector forming mold

Abstract

The invention discloses a long plastic connector forming mold, and aims to overcome the defects that a long plastic connector forming mold is complex in structure and long in forming period, and the production efficiency of products is affected. The mold comprises a front mold and a rear mold, a static mold core is arranged on the front mold, a movable mold core is arranged on the rear mold, a cavity is formed between the static mold core and the movable mold core, the rear mold comprises a push plate, a transition plate and a bottom plate, a lateral core-pulling sliding block with an inclined hole is installed on the push plate, an inclined guide column is installed on the front mold, and the inclined guide column is connected with the inclined hole in an inserted mode; a rear mold core is mounted on the bottom plate and is inserted into the cavity; the push plate is connected with a positioning piece, a limiting rod is connected between the push plate and the transition plate, the transition plate is connected with a distance piece, a locking rod is connected between the front mold and the transition plate, and an unlocking rod is connected between the bottom plate and the transition plate. According to the long plastic connector forming mold, the product demolding mode is improved, the forming period of the mold is shortened, the machining difficulty of the mold is reduced, and therefore the production efficiency of the product is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and more specifically, to a long plastic joint molding mold. Background Art

[0002] At present, in the outdoor swimming pool industry, the connection of the swimming pool bracket requires a three-way plastic joint. In order to ensure the reliability of the bracket connection, the length of the plastic joint and the bracket matching part is often increased, which makes the height of the plastic joint very high, nearly 260mm. For this type of high plastic products, in order to reduce the thickness of the mold, the lying mold opening method is basically adopted, which requires three-way slider core pulling. Due to the long core pulling, it is also necessary to use a cylinder core pulling, and the product molding cycle is long. In terms of mold processing, due to the long core pulling, in order to avoid the appearance of the product being scratched, the long slider needs to be demolded twice, the middle core is withdrawn first, and then the slider is retreated as a whole. The slider processing is complicated and the processing cycle is long. It is easy to leave a push rod mark on the surface of the product, and the product pouring position is just on the appearance surface, and the pouring gate is not easy to handle. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a long plastic joint forming mold, which improves the product demoulding method, shortens the molding cycle of the mold, reduces the processing difficulty of the mold, and thus improves the production efficiency of the product.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a long plastic joint forming mold, including a front mold and a rear mold, a static mold core is arranged on the front mold, a dynamic mold core is arranged on the rear mold, a cavity is formed between the static mold core and the dynamic mold core, the rear mold includes a push plate, a transition plate and a bottom plate, a lateral core-pulling slider with an inclined hole is installed on the push plate, an inclined guide column is installed on the front mold, and the inclined guide column is plug-connected with the inclined hole; a rear mold core is installed on the bottom plate, and the rear mold core is inserted into the cavity; the push plate is connected to the positioning piece, a limit rod is connected between the push plate and the transition plate, the transition plate is connected to the distance piece, a locking rod is connected between the front mold and the transition plate, and an unlocking rod is connected between the bottom plate and the transition plate.

[0005] After the injection molding of the long plastic joint is completed, the mold base of the injection molding machine retreats, driving the bottom plate of the rear mold and the rear mold core fixed thereon to retreat, realizing the first parting, and the long plastic joint is partially separated from the rear mold core. At this time, the unlocking rod unlocks the locking rod.

[0006] The mold base continues to retreat, and driven by the distance piece, the bottom plate, transition plate and push plate continue to retreat to achieve the second parting. The inclined guide column installed on the front mold drives the lateral core-pulling slider on the push plate to slide outward to achieve the lateral core-pulling of the long plastic joint. At this time, the positioning piece is limited on the front mold.

[0007] The push plate is fixed in place under the limit of the positioning part, and the bottom plate and the transition plate continue to retreat to achieve the third parting. A small part of the long plastic joint contacts the rear mold core, supporting the long plastic joint product to prevent it from falling off automatically. The manipulator then takes out the plastic product, closes the mold and enters the next injection molding cycle. The limit rod is connected between the push plate and the transition plate, which plays a guiding and limiting role to prevent the transition plate from separating from the push plate.

[0008] In the technical solution of the present invention, the long plastic joint adopts three-parting demoulding, which reduces the difficulty of demoulding, and the rear mold core is easy to detach from the long plastic joint. The inclined guide column installed on the front mold is plug-connected with the inclined hole on the lateral core-pulling slider. In the process of demoulding with the push plate moving with the bottom plate, the lateral core-pulling slider moves outward under the action of the inclined guide column to pull the core and demould. Compared with the oil cylinder core-pulling structure, the inclined guide column core-pulling mold structure is simpler, which reduces the difficulty of processing, and the inclined guide column core-pulling mold structure has a short molding cycle, which is conducive to improving the production efficiency of the product.

[0009] Preferably, a hook is provided on the locking rod, a connecting seat is provided on the transition plate, a locking block and an elastic member are installed on the connecting seat, the elastic member abuts against the locking block, and the locking block is locked in the hook position; a protrusion is provided on the unlocking rod, and the unlocking rod moves with the base plate so that the protrusion pushes the locking block to unlock the locking rod.

[0010] During the injection molding of the long plastic joint, the hook on the locking rod is locked with the locking block, and the transition plate is connected to the front mold. During the first parting process, the mold base of the injection molding machine retreats, driving the bottom plate of the rear mold and the rear mold core fixed thereon to retreat, and the long plastic joint is partially separated from the rear mold core. The unlocking rod moves with the bottom plate to make the protrusion push the locking block, and the locking block is separated from the locking rod, thereby unlocking the locking rod. After that, the push plate moves with the bottom plate for the second parting.

[0011] Preferably, the positioning member is a pull rod, one end of which is tightly connected to the front mold, the push plate and the pull rod are movably mounted, and a limit head is arranged at the other end of the pull rod to limit the push plate.

[0012] After the push plate moves with the bottom plate to be demoulded into place, the limit head is limited on the push plate, thereby realizing the positioning of the push plate. After that, the push plate is fixed in place, and the bottom plate and the transition plate continue to retreat to realize the third parting.

[0013] Preferably, the distance piece is a guide rod, one end of which is tightly connected to the base plate, the guide rod is movably mounted on the transition plate, and a positioning head is arranged at the other end of the guide rod to limit the transition plate.

[0014] During the demoulding process of the base plate, the guide rod plays a guiding and positioning role.

[0015] Preferably, a slide rail corresponding to the lateral core-pulling slider is arranged on the push plate, and the lateral core-pulling slider is slidably connected to the slide rail.

[0016] The lateral core-pulling slider slides along the slide rail smoothly and reliably.

[0017] Preferably, the movable mold core includes two side mold cores and a middle mold core arranged between the two side mold cores, the side mold cores are fastened to the push plate, and the middle mold core is fastened to the transition plate; one end of the lateral core-pulling slider is placed on the side mold core, and the rear mold core is plug-in connected to the middle mold core.

[0018] During the core pulling and demoulding process, the middle mold core moves with the transition plate, while the side mold core remains on the push plate. Both sides of the long plastic joint product are supported on the side mold cores to facilitate the demoulding operation of the product.

[0019] Preferably, a mold buckle is connected between the push plate and the transition plate.

[0020] The mold buckle is connected between the push plate and the transition plate to facilitate the connection and separation of the push plate and the transition plate.

[0021] Preferably, a plurality of guide posts are installed on the bottom plate, guide sleeves corresponding to the guide posts are arranged on the front mold, the push plate and the transition plate are both connected to the guide post sleeves, and the guide posts and the guide sleeves are adapted to be assembled.

[0022] During the demoulding process of the base plate, the guide column slides along the guide sleeve to ensure the accuracy and reliability of the moving position.

[0023] Preferably, a hot runner is provided on the front mold, one end of the hot runner is connected to the mold cavity, and the other end of the hot runner extends to the upper surface of the front mold to form a pouring port.

[0024] The setting of hot runner facilitates the glue feeding operation in the injection molding process.

[0025] Preferably, two cavities are formed between the static mold core and the dynamic mold core, two groups of lateral core-pulling sliders are installed on the push plate, and two groups of rear mold cores are installed on the bottom plate.

[0026] The mold is provided with two cavities to realize one-out-two-cavities, which is beneficial to improving production efficiency.

[0027] Compared with the prior art, the beneficial effects of the present invention are: (1) the long plastic joint molding mold improves the product demolding method, shortens the molding cycle of the mold, reduces the difficulty of mold processing, and thus improves the production efficiency of the product; (2) the long plastic joint adopts three-parting demolding, which reduces the difficulty of demolding, and the rear mold core is easy to detach from the long plastic joint; (3) two cavities are arranged on the mold to realize one-out and two-cavity, which is conducive to improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2It is a structural diagram of the connection between the locking rod and the unlocking rod of the present invention.

[0030] Figure 3 It is a schematic diagram of the connection of the static mold core of the present invention.

[0031] Figure 4 It is a schematic diagram of the base plate connection of the present invention.

[0032] Figure 5 It is a schematic diagram of the push plate connection of the present invention.

[0033] Figure 6 It is a rear mold sectional view of the present invention.

[0034] Figure 7 It is a front view of the mold opening state of the present invention.

[0035] Figure 8 It is a side view of the mold opening state of the present invention.

[0036] Fig. 9 It is a front view of Example 2 of the present invention.

[0037] Fig.10 It is a cross-sectional view of Example 3 of the present invention.

[0038] Fig.11 It is a partial enlarged view of the position of the moving seat of Example 3 of the present invention.

[0039] In the figure: 1, front mold, 2, rear mold, 3, static mold core, 4, dynamic mold core, 5, static mold cavity, 6, dynamic mold cavity, 7, push plate, 8, transition plate, 9, bottom plate, 10, mold buckle, 11, inclined hole, 12, lateral core-pulling slider, 13, inclined guide column, 14, rear mold core, 15, lateral core, 16, limit rod, 17, locking rod, 18, unlocking rod, 19, hook, 20, connecting seat, 21, locking block, 22, elastic member, 23, locking hole, 24, protrusion , 25, limit hole, 26, pull rod, 27, guide rod, 28, slide rail, 29, side mold, 30, middle mold, 31, guide column, 32, guide sleeve, 33, hot runner, 34, long plastic joint, 35, positioning seat, 36, positioning hole, 37, protrusion, 38, moving seat, 39, rack, 40, driving wheel, 41, vibration rod, 42, impact head, 43, elastomer, 44, long groove, 45, driving column, 46, flange, 47, top block. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: A long plastic joint forming mold (see Figures 1 to 8), including a front mold 1 and a rear mold 2, the rear mold 2 can move to realize core pulling and demoulding, a static mold core 3 is provided on the front mold 1, and a dynamic mold core 4 is provided on the rear mold 2. The static mold core 3 is installed near the middle of the end surface of the front mold 1. A cavity is formed between the static mold core 3 and the dynamic mold core 4, and the long plastic joint 34 is in a T-shaped structure. A static mold cavity 5 with an inwardly concave arc is provided on the static mold core 3, and a T-shaped dynamic mold cavity 6 is provided on the dynamic mold core 4. The static mold cavity 5 and the dynamic mold cavity 6 together constitute a T-shaped cavity.

[0041] The rear mold 2 includes a push plate 7, a transition plate 8 and a bottom plate 9. The transition plate 8 is placed between the push plate 7 and the bottom plate 9. A mold buckle 10 is connected between the push plate 7 and the transition plate 8. A plurality of mold buckles 10 are provided. The mold buckles 10 are connected between the push plate 7 and the transition plate 8 to facilitate the connection and separation of the push plate 7 and the transition plate 8. The push plate 7 is arranged opposite to the front mold 1. A lateral core-pulling slider 12 with an inclined hole 11 is installed on the push plate 7. An inclined guide column 13 is installed on the front mold 1. Four inclined holes 11 and inclined guide columns 13 are arranged at intervals in the circumferential direction. The inclined holes 11 and inclined guide columns 13 are inclined outwardly away from the front mold 1. The inclined guide columns 13 are plug-connected with the inclined holes 11. The rear mold core 14 is installed on the bottom plate 9 and inserted into the cavity. Two cavities are formed between the static mold core 3 and the movable mold core 4. Two groups of lateral core-pulling sliders 12 are installed on the push plate 7. Each cavity corresponds to a group of lateral core-pulling sliders 12. Two opposite lateral core-pulling sliders 12 are arranged in one group. Two groups of rear mold cores 14 are installed on the bottom plate 9. A lateral core 15 is arranged at the end of the lateral core-pulling slider 12. Two cavities are arranged on the mold to realize one-out two-cavity, which is conducive to improving production efficiency.

[0042] A limit rod 16 is connected between the push plate 7 and the transition plate 8, one end of the limit rod 16 is tightly connected to the transition plate 8, and a convex head is arranged at the other end of the limit rod 16. The limit rod 16 is movably connected with the push plate 7, and the convex head is pressed against the push plate 7 to achieve positioning. A locking rod 17 is connected between the front mold 1 and the transition plate 8, and an unlocking rod 18 is connected between the bottom plate 9 and the transition plate 8.

[0043] A hook 19 is provided on the locking rod 17, one end of the locking rod 17 is fastened to the front mold 1, the hook 19 is provided on the other end of the locking rod 17, and four locking rods 17 are provided at intervals in the circumferential direction of the front mold 1. A connecting seat 20 is provided on the transition plate 8, a locking block 21 and an elastic member 22 are installed on the connecting seat 20, the locking block 21 is slidably provided, the elastic member 22 abuts against the locking block 21, the elastic member 22 adopts a spring, a locking hole 23 is provided on the locking block 21, the locking rod 17 is adapted to be matched with the locking hole 23, the locking block 21 is locked at the position of the hook 19, and the hook 19 is pressed against the end surface of the locking block 21 to realize locking positioning; a protrusion 24 is provided on the unlocking rod 18, and inclined guide surfaces are provided at both ends of the protrusion 24, the unlocking rod 18 moves with the bottom plate 9 so that the protrusion 24 pushes the locking block 21 to realize unlocking of the locking rod 17. A limiting hole 25 is provided on the connecting seat 20 corresponding to the unlocking rod 18 , and the unlocking rod 18 is movably plug-connected with the limiting hole 25 .

[0044] The push plate 7 is connected to the positioning member, and the transition plate 8 is connected to the distance member. The positioning member is a pull rod 26, one end of which is tightly connected to the front mold 1, and the push plate 7 is movably fitted with the pull rod 26. A limit head is provided at the other end of the pull rod 26, and the limit head limits the push plate 7. The distance member is a guide rod 27, one end of which is tightly connected to the bottom plate 9, and the guide rod 27 is movably fitted with the transition plate 8. A positioning head is provided at the other end of the guide rod 27, and the positioning head limits the transition plate 8.

[0045] The push plate 7 is provided with a slide rail 28 corresponding to the lateral core-pulling slider 12, and the lateral core-pulling slider 12 is slidably connected with the slide rail 28. The slide rails 28 are provided on both sides of the lateral core-pulling slider 12, and the cross section of the slide rail 28 is a "convex"-shaped structure. Slide grooves are provided on both sides of the lateral core-pulling slider 12, and the slide grooves are adapted to be connected with the slide rails 28. The lateral core-pulling slider 12 slides along the slide rails 28, which is stable and reliable.

[0046] The movable mold core 4 includes two side mold cores 29 and a middle mold core 30 disposed between the two side mold cores 29. The side mold cores are fastened to the push plate 7, and the middle mold core 30 is fastened to the transition plate 8. One end of the lateral core-pulling slider 12 is placed on the side mold core 29, and the rear mold core 14 is plug-connected with the middle mold core 30. Both ends of the movable mold cavity 6 are placed on the side mold cores 29, and the rest of the movable mold cavity 6 is placed on the middle mold core 30.

[0047] A plurality of guide posts 31 are installed on the bottom plate 9, four guide posts 31 are arranged at intervals in the circumferential direction, a guide sleeve 32 corresponding to the guide post 31 is arranged on the front mold 1, the push plate 7 and the transition plate 8 are both connected with the guide post 31, and the guide post 31 is adapted to be assembled with the guide sleeve 32. A hot runner 33 is arranged on the front mold 1, one end of the hot runner 33 is connected with the cavity, and the other end of the hot runner 33 extends to the upper surface of the front mold 1 to form a pouring port.

[0048] After the injection molding of the long plastic joint 34 is completed, the mold base of the injection molding machine retreats, driving the bottom plate 9 of the rear mold 2 and the rear mold core 14 fixed thereon to retreat, realizing the first parting, and the long plastic joint 34 is partially separated from the rear mold core 14. During this process, the push plate 7 and the transition plate 8 remain stationary until the protrusion 24 on the unlocking rod 18 hits the locking block 21, pushing the locking block 21 to move to unlock the locking rod 17.

[0049] The mold base continues to retreat, and driven by the distance piece, the bottom plate 9, the transition plate 8 and the push plate 7 continue to retreat to achieve the second parting. The inclined guide column 13 installed on the front mold 1 drives the lateral core-pulling slider 12 on the push plate 7 to slide outward to achieve the lateral core-pulling of the long plastic joint 34. At this time, the positioning piece is limited on the front mold 1.

[0050] The push plate 7 is fixed in place under the limit of the positioning member, and the bottom plate 9 and the transition plate 8 continue to retreat to achieve the third parting. A small part of the long plastic joint 34 contacts the rear mold core 14, supporting the long plastic joint 34 product to prevent it from automatically falling off. The manipulator then takes out the plastic product, and then closes the mold to enter the next injection molding cycle. The limit rod 16 is connected between the push plate 7 and the transition plate 8, playing a guiding and limiting role to prevent the transition plate 8 from separating from the push plate 7.

[0051] In the technical solution of the present invention, the long plastic joint 34 adopts three-parting demoulding, which reduces the demoulding difficulty, and the rear mold core 14 is easy to be separated from the long plastic joint 34. The inclined guide column 13 installed on the front mold 1 is plug-connected with the inclined hole 11 on the lateral core-pulling slider 12. In the process of the push plate 7 moving with the bottom plate 9 to demould, the lateral core-pulling slider 12 moves outward under the action of the inclined guide column 13 to pull the core and demould. Compared with the oil cylinder core-pulling structure, the core-pulling mold structure of the inclined guide column 13 is simpler, which reduces the processing difficulty, and the core-pulling mold structure of the inclined guide column 13 has a short molding cycle, which is conducive to improving the production efficiency of the product.

[0052] Example 2: A long plastic joint forming mold (see Fig. 9 ), including a front mold 1 and a rear mold 2, the rear mold 2 can move to realize core pulling and demoulding, a static mold core 3 is provided on the front mold 1, and a dynamic mold core 4 is provided on the rear mold 2. The static mold core 3 is installed near the middle of the end surface of the front mold 1. A cavity is formed between the static mold core 3 and the dynamic mold core 4, and the long plastic joint 34 is in a T-shaped structure. A static mold cavity 5 with an inwardly concave arc is provided on the static mold core 3, and a T-shaped dynamic mold cavity 6 is provided on the dynamic mold core 4. The static mold cavity 5 and the dynamic mold cavity 6 together constitute a T-shaped cavity.

[0053] The rear mold 2 includes a push plate 7, a transition plate 8 and a bottom plate 9. The transition plate 8 is placed between the push plate 7 and the bottom plate 9. A mold buckle 10 is connected between the push plate 7 and the transition plate 8. A plurality of mold buckles 10 are provided. The mold buckles 10 are connected between the push plate 7 and the transition plate 8 to facilitate the connection and separation of the push plate 7 and the transition plate 8. The push plate 7 is arranged opposite to the front mold 1. A lateral core-pulling slider 12 with an inclined hole 11 is installed on the push plate 7. An inclined guide column 13 is installed on the front mold 1. The inclined hole 11 and the inclined guide column 13 are both inclined outwardly away from the front mold 1. The inclined guide column 13 is plug-connected with the inclined hole 11. The rear mold core 14 is installed on the bottom plate 9 and inserted into the cavity. Two cavities are formed between the static mold core 3 and the movable mold core 4. Two groups of lateral core-pulling sliders 12 are installed on the push plate 7. Each cavity corresponds to a group of lateral core-pulling sliders 12. Two opposite lateral core-pulling sliders 12 are arranged in one group. Two groups of rear mold cores 14 are installed on the bottom plate 9. A lateral core 15 is arranged at the end of the lateral core-pulling slider 12. Two cavities are arranged on the mold to realize one-out two-cavity, which is conducive to improving production efficiency.

[0054] A limit rod 16 is connected between the push plate 7 and the transition plate 8, one end of the limit rod 16 is tightly connected to the transition plate 8, and a convex head is arranged at the other end of the limit rod 16. The limit rod 16 is movably connected with the push plate 7, and the convex head is pressed against the push plate 7 to achieve positioning. A locking rod 17 is connected between the front mold 1 and the transition plate 8, and an unlocking rod 18 is connected between the bottom plate 9 and the transition plate 8.

[0055] A hook 19 is provided on the locking rod 17, one end of the locking rod 17 is fastened to the front mold 1, the hook 19 is provided on the other end of the locking rod 17, and four locking rods 17 are provided at intervals in the circumferential direction of the front mold 1. A connecting seat 20 is provided on the transition plate 8, a locking block 21 and an elastic member 22 are installed on the connecting seat 20, the locking block 21 is slidably provided, the elastic member 22 abuts against the locking block 21, the elastic member 22 adopts a spring, a locking hole 23 is provided on the locking block 21, the locking rod 17 is adapted to be matched with the locking hole 23, the locking block 21 is locked at the position of the hook 19, and the hook 19 is pressed against the end surface of the locking block 21 to realize locking positioning; a protrusion 24 is provided on the unlocking rod 18, and inclined guide surfaces are provided at both ends of the protrusion 24, the unlocking rod 18 moves with the bottom plate 9 so that the protrusion 24 pushes the locking block 21 to realize unlocking of the locking rod 17. A limiting hole 25 is provided on the connecting seat 20 corresponding to the unlocking rod 18 , and the unlocking rod 18 is movably plug-connected with the limiting hole 25 .

[0056] The push plate 7 is connected to the positioning member, and the transition plate 8 is connected to the distance member. The positioning member is a positioning seat 35, and a positioning hole 36 is provided on the positioning seat 35. The locking rod 17 is adapted to be inserted into the positioning hole 36, and the hook 19 abuts against the positioning seat 35 to limit the push plate 7. The connecting seat 20 serves as a distance member, and a limiting hole 25 is provided on the connecting seat 20. The unlocking rod 18 is adapted to be inserted into the limiting hole 25. A protrusion 37 is provided on the unlocking rod 18, and the protrusion 37 abuts against the connecting seat 20 to limit the transition plate 8. The locking rod 17 not only achieves the locking function, but also plays a role in limiting the movement of the push plate 7. The unlocking rod 18 not only plays a role in unlocking, but also plays a role in limiting the movement of the transition plate 8.

[0057] The push plate 7 is provided with a slide rail 28 corresponding to the lateral core-pulling slider 12, and the lateral core-pulling slider 12 is slidably connected with the slide rail 28. The slide rails 28 are provided on both sides of the lateral core-pulling slider 12, and the cross section of the slide rail 28 is a "convex"-shaped structure. Slide grooves are provided on both sides of the lateral core-pulling slider 12, and the slide grooves are adapted to be connected with the slide rails 28. The lateral core-pulling slider 12 slides along the slide rails 28, which is stable and reliable.

[0058] The movable mold core 4 includes two side mold cores 29 and a middle mold core 30 disposed between the two side mold cores 29. The side mold cores are fastened to the push plate 7, and the middle mold core 30 is fastened to the transition plate 8. One end of the lateral core-pulling slider 12 is placed on the side mold core 29, and the rear mold core 14 is plug-connected with the middle mold core 30. Both ends of the movable mold cavity 6 are placed on the side mold cores 29, and the rest of the movable mold cavity 6 is placed on the middle mold core 30.

[0059] A plurality of guide posts 31 are installed on the bottom plate 9, four guide posts 31 are arranged at intervals in the circumferential direction, a guide sleeve 32 corresponding to the guide post 31 is arranged on the front mold 1, the push plate 7 and the transition plate 8 are both connected with the guide post 31, and the guide post 31 is adapted to be assembled with the guide sleeve 32. A hot runner 33 is arranged on the front mold 1, one end of the hot runner 33 is connected with the cavity, and the other end of the hot runner 33 extends to the upper surface of the front mold 1 to form a pouring port.

[0060] After the injection molding of the long plastic joint 34 is completed, the mold base of the injection molding machine retreats, driving the bottom plate 9 of the rear mold 2 and the rear mold core 14 fixed thereon to retreat, realizing the first parting, and the long plastic joint 34 is partially separated from the rear mold core 14. During this process, the push plate 7 and the transition plate 8 remain stationary until the protrusion 24 on the unlocking rod 18 hits the locking block 21, pushing the locking block 21 to move to unlock the locking rod 17.

[0061] The mold base continues to retreat, and driven by the distance piece, the bottom plate 9, the transition plate 8 and the push plate 7 continue to retreat to achieve the second parting. The inclined guide column 13 installed on the front mold 1 drives the lateral core-pulling slider 12 on the push plate 7 to slide outward to achieve the lateral core-pulling of the long plastic joint 34. At this time, the positioning piece is limited on the front mold 1.

[0062] The push plate 7 is fixed in place under the limit of the positioning member, and the bottom plate 9 and the transition plate 8 continue to retreat to achieve the third parting. A small part of the long plastic joint 34 contacts the rear mold core 14, supporting the long plastic joint 34 product to prevent it from automatically falling off. The manipulator then takes out the plastic product, and then closes the mold to enter the next injection molding cycle. The limit rod 16 is connected between the push plate 7 and the transition plate 8, playing a guiding and limiting role to prevent the transition plate 8 from separating from the push plate 7.

[0063] In the technical solution of the present invention, the long plastic joint 34 adopts three-parting demoulding, which reduces the demoulding difficulty, and the rear mold core 14 is easy to be separated from the long plastic joint 34. The inclined guide column 13 installed on the front mold 1 is plug-connected with the inclined hole 11 on the lateral core-pulling slider 12. In the process of the push plate 7 moving with the bottom plate 9 to demould, the lateral core-pulling slider 12 moves outward under the action of the inclined guide column 13 to pull the core and demould. Compared with the oil cylinder core-pulling structure, the core-pulling mold structure of the inclined guide column 13 is simpler, which reduces the processing difficulty, and the core-pulling mold structure of the inclined guide column 13 has a short molding cycle, which is conducive to improving the production efficiency of the product.

[0064] Embodiment 3: A long plastic joint forming mold (see Fig.10 , Fig.11 ), including a front mold 1 and a rear mold 2, the rear mold 2 can move to realize core pulling and demoulding, a static mold core 3 is provided on the front mold 1, and a dynamic mold core 4 is provided on the rear mold 2. The static mold core 3 is installed near the middle of the end surface of the front mold 1. A cavity is formed between the static mold core 3 and the dynamic mold core 4, and the long plastic joint 34 is in a T-shaped structure. A static mold cavity 5 with an inwardly concave arc is provided on the static mold core 3, and a T-shaped dynamic mold cavity 6 is provided on the dynamic mold core 4. The static mold cavity 5 and the dynamic mold cavity 6 together constitute a T-shaped cavity.

[0065] The rear mold 2 includes a push plate 7, a transition plate 8 and a bottom plate 9. The transition plate 8 is placed between the push plate 7 and the bottom plate 9. A mold buckle 10 is connected between the push plate 7 and the transition plate 8. A plurality of mold buckles 10 are provided. The mold buckles 10 are connected between the push plate 7 and the transition plate 8 to facilitate the connection and separation of the push plate 7 and the transition plate 8. The push plate 7 is arranged opposite to the front mold 1. A lateral core-pulling slider 12 with an inclined hole 11 is installed on the push plate 7. An inclined guide column 13 is installed on the front mold 1. The inclined hole 11 and the inclined guide column 13 are both inclined outwardly away from the front mold 1. The inclined guide column 13 is plug-connected with the inclined hole 11. The rear mold core 14 is installed on the bottom plate 9 and inserted into the cavity. Two cavities are formed between the static mold core 3 and the movable mold core 4. Two groups of lateral core-pulling sliders 12 are installed on the push plate 7. Each cavity corresponds to a group of lateral core-pulling sliders 12. Two opposite lateral core-pulling sliders 12 are arranged in one group. Two groups of rear mold cores 14 are installed on the bottom plate 9. A lateral core 15 is arranged at the end of the lateral core-pulling slider 12. Two cavities are arranged on the mold to realize one-out two-cavity, which is conducive to improving production efficiency.

[0066] A limit rod 16 is connected between the push plate 7 and the transition plate 8, one end of the limit rod 16 is tightly connected to the transition plate 8, and a convex head is arranged at the other end of the limit rod 16. The limit rod 16 is movably connected with the push plate 7, and the convex head is pressed against the push plate 7 to achieve positioning. A locking rod 17 is connected between the front mold 1 and the transition plate 8, and an unlocking rod 18 is connected between the bottom plate 9 and the transition plate 8.

[0067] A hook 19 is provided on the locking rod 17, one end of the locking rod 17 is fastened to the front mold 1, the hook 19 is provided on the other end of the locking rod 17, and four locking rods 17 are provided at intervals in the circumferential direction of the front mold 1. A connecting seat 20 is provided on the transition plate 8, a locking block 21 and an elastic member 22 are installed on the connecting seat 20, the locking block 21 is slidably provided, the elastic member 22 abuts against the locking block 21, the elastic member 22 adopts a spring, a locking hole 23 is provided on the locking block 21, the locking rod 17 is adapted to be matched with the locking hole 23, the locking block 21 is locked at the position of the hook 19, and the hook 19 is pressed against the end surface of the locking block 21 to realize locking positioning; a protrusion 24 is provided on the unlocking rod 18, and inclined guide surfaces are provided at both ends of the protrusion 24, the unlocking rod 18 moves with the bottom plate 9 so that the protrusion 24 pushes the locking block 21 to realize unlocking of the locking rod 17. A limiting hole 25 is provided on the connecting seat 20 corresponding to the unlocking rod 18 , and the unlocking rod 18 is movably plug-connected with the limiting hole 25 .

[0068] The push plate 7 is connected to the positioning member, and the transition plate 8 is connected to the distance member. The positioning member is a positioning seat 35, and a positioning hole 36 is provided on the positioning seat 35. The locking rod 17 is adapted to be inserted into the positioning hole 36, and the hook 19 abuts against the positioning seat 35 to limit the push plate 7. The connecting seat 20 serves as a distance member, and a limiting hole 25 is provided on the connecting seat 20. The unlocking rod 18 is adapted to be inserted into the limiting hole 25. A protrusion 37 is provided on the unlocking rod 18, and the protrusion 37 abuts against the connecting seat 20 to limit the transition plate 8. The locking rod 17 not only achieves the locking function, but also plays a role in limiting the movement of the push plate 7. The unlocking rod 18 not only plays a role in unlocking, but also plays a role in limiting the movement of the transition plate 8.

[0069] The push plate 7 is provided with a slide rail 28 corresponding to the lateral core-pulling slider 12, and the lateral core-pulling slider 12 is slidably connected with the slide rail 28. The slide rails 28 are provided on both sides of the lateral core-pulling slider 12, and the cross section of the slide rail 28 is a "convex"-shaped structure. Slide grooves are provided on both sides of the lateral core-pulling slider 12, and the slide grooves are adapted to be connected with the slide rails 28. The lateral core-pulling slider 12 slides along the slide rails 28, which is stable and reliable.

[0070] The movable mold core 4 includes two side mold cores 29 and a middle mold core 30 disposed between the two side mold cores 29. The side mold cores are fastened to the push plate 7, and the middle mold core 30 is fastened to the transition plate 8. One end of the lateral core-pulling slider 12 is placed on the side mold core 29, and the rear mold core 14 is plug-connected with the middle mold core 30. Both ends of the movable mold cavity 6 are placed on the side mold cores 29, and the rest of the movable mold cavity 6 is placed on the middle mold core 30.

[0071] A plurality of guide posts 31 are installed on the bottom plate 9, four guide posts 31 are arranged at intervals in the circumferential direction, a guide sleeve 32 corresponding to the guide post 31 is arranged on the front mold 1, the push plate 7 and the transition plate 8 are both connected with the guide post 31, and the guide post 31 is adapted to be assembled with the guide sleeve 32. A hot runner 33 is arranged on the front mold 1, one end of the hot runner 33 is connected with the cavity, and the other end of the hot runner 33 extends to the upper surface of the front mold 1 to form a pouring port.

[0072] A movable seat 38 is installed on the bottom plate 9, a rack 39 is arranged on the movable seat 38, a driving wheel 40 and a vibration rod 41 are installed on the base, the rack 39 is connected to the driving wheel 40 in a transmission manner, the vibration rod 41 is rotatably arranged, a collision head 42 is connected to the vibration rod 41 through an elastic body 43, the collision head 42 abuts against the rear mold core 14, a long groove 44 is arranged on the vibration rod 41, a driving column 45 is arranged on the driving wheel 40, the driving column 45 is movably inserted into the long groove 44, and the movable seat 38 is connected to the injection molding machine mold base. In the initial stage, the injection molding machine mold base moves backward to drive the movable seat 38 to move, and the driving wheel 40 rotates to make the collision head 42 hit the rear mold core 14, so that the rear mold core 14 produces a vibration effect, which is convenient for demoulding.

[0073] The driving wheel 40 and the rack 39 are connected by a transition gear, and the transition gear meshes and transmits between the rack 39 and the driving wheel 40. Two racks 39 are arranged on the moving seat 38, and two driving wheels 40 and a vibration rod 41 are installed on the base. Each rear mold core 14 corresponds to a driving wheel 40 and a vibration rod 41. An impact ring is arranged at the end of the rear mold core 14, and the impact head 42 abuts on the outer wall of the impact ring. The elastic body 43 is a spring, and a flange 46 is arranged at one end of the moving seat 38. A guide groove is arranged on the base and corresponding to the moving seat 38. The moving seat 38 is connected to the guide groove, and the flange 46 is slidably adapted to the inner wall of the guide groove. A top block 47 is arranged on the inner wall of the guide groove, and the top block 47 limits the flange 46. After the moving seat 38 moves to the flange 46 and abuts against the top block 47, it can drive the bottom plate 9 to move.

[0074] After the injection molding of the long plastic joint 34 is completed, the mold base of the injection molding machine retreats, driving the moving base 38 to move, and the driving wheel 40 rotates to make the impact head 42 impact the rear mold core 14, so that the rear mold core 14 produces a vibration effect. After the moving base 38 moves to the flange 46 and abuts against the top block 47, it can drive the bottom plate 9 to move, and the bottom plate 9 and the rear mold core 14 fixed thereon retreat to achieve the first parting, and the long plastic joint 34 is partially separated from the rear mold core 14. In this process, the push plate 7 and the transition plate 8 remain stationary until the protrusion 24 on the unlocking rod 18 hits the locking block 21, pushing the locking block 21 to move to unlock the locking rod 17.

[0075] The mold base continues to retreat, and driven by the distance piece, the bottom plate 9, the transition plate 8 and the push plate 7 continue to retreat to achieve the second parting. The inclined guide column 13 installed on the front mold 1 drives the lateral core-pulling slider 12 on the push plate 7 to slide outward to achieve the lateral core-pulling of the long plastic joint 34. At this time, the positioning piece is limited on the front mold 1.

[0076] The push plate 7 is fixed in place under the limit of the positioning member, and the bottom plate 9 and the transition plate 8 continue to retreat to achieve the third parting. A small part of the long plastic joint 34 contacts the rear mold core 14, supporting the long plastic joint 34 product to prevent it from automatically falling off. The manipulator then takes out the plastic product, and then closes the mold to enter the next injection molding cycle. The limit rod 16 is connected between the push plate 7 and the transition plate 8, playing a guiding and limiting role to prevent the transition plate 8 from separating from the push plate 7.

[0077] In the technical solution of the present invention, the long plastic joint 34 adopts three-parting demoulding, which reduces the demoulding difficulty, and the rear mold core 14 is easy to be separated from the long plastic joint 34. The inclined guide column 13 installed on the front mold 1 is plug-connected with the inclined hole 11 on the lateral core-pulling slider 12. In the process of the push plate 7 moving with the bottom plate 9 to demould, the lateral core-pulling slider 12 moves outward under the action of the inclined guide column 13 to pull the core and demould. Compared with the oil cylinder core-pulling structure, the core-pulling mold structure of the inclined guide column 13 is simpler, which reduces the processing difficulty, and the core-pulling mold structure of the inclined guide column 13 has a short molding cycle, which is conducive to improving the production efficiency of the product.

[0078] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A long plastic joint forming mold, comprising a front mold and a rear mold, a static mold core is arranged on the front mold, a dynamic mold core is arranged on the rear mold, and a cavity is formed between the static mold core and the dynamic mold core, wherein: The rear mold includes a push plate, a transition plate and a bottom plate. A lateral core-pulling slider with an inclined hole is installed on the push plate. An inclined guide column is installed on the front mold, and the inclined guide column is plug-in connected with the inclined hole. The rear mold core is installed on the bottom plate, and the rear mold core is inserted into the cavity. The push plate is connected to the positioning piece, the limit rod is connected between the push plate and the transition plate, the transition plate is connected to the distance piece, the locking rod is connected between the front mold and the transition plate, and the unlocking rod is connected between the bottom plate and the transition plate.

2. A long plastic joint forming mold according to claim 1, characterized in that: A hook is arranged on the locking rod, a connecting seat is arranged on the transition plate, a locking block and an elastic member are installed on the connecting seat, the elastic member abuts against the locking block, and the locking block is locked in the hook position; a protrusion is arranged on the unlocking rod, and the unlocking rod moves with the bottom plate so that the protrusion pushes the locking block to unlock the locking rod.

3. A long plastic joint forming mold according to claim 1, characterized in that: The positioning piece is a pull rod, one end of which is tightly connected to the front mold, the push plate and the pull rod are movably mounted, and a limit head is arranged at the other end of the pull rod to limit the push plate.

4. A long plastic joint forming mold according to claim 1, characterized in that: The distance piece is a guide rod, one end of which is tightly connected to the bottom plate, the guide rod and the transition plate are movably mounted, and a positioning head is arranged at the other end of the guide rod to limit the transition plate.

5. The long plastic joint forming mold according to claim 1, characterized in that: A slide rail corresponding to the lateral core-pulling slider is arranged on the push plate, and the lateral core-pulling slider is slidably connected with the slide rail.

6. The long plastic joint forming mold according to claim 1, characterized in that: The movable mold core includes two side mold cores and a middle mold core arranged between the two side mold cores. The side mold cores are tightly connected to the push plate, and the middle mold core is tightly connected to the transition plate. One end of the lateral core-pulling slider is placed on the side mold core, and the rear mold core is plug-in connected to the middle mold core.

7. The long plastic joint forming mold according to claim 1, characterized in that: A mold buckle is connected between the push plate and the transition plate.

8. The long plastic joint forming mold according to claim 1, characterized in that: A plurality of guide posts are installed on the bottom plate, guide sleeves corresponding to the guide posts are arranged on the front mold, the push plate and the transition plate are both connected with the guide post sets, and the guide posts and the guide sleeves are adapted to be assembled.

9. A long plastic joint forming mold according to any one of claims 1 to 8, characterized in that: A hot runner is arranged on the front mold, one end of the hot runner is connected with the mold cavity, and the other end of the hot runner extends to the upper surface of the front mold to form a pouring port.

10. A long plastic joint forming mold according to any one of claims 1 to 8, characterized in that: Two cavities are formed between the static mold core and the dynamic mold core, two groups of lateral core-pulling sliders are installed on the push plate, and two groups of rear mold cores are installed on the bottom plate.

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