A composite drive demoulding device for injection molded parts

Abstract

The present application relates to the technical field of demoulding devices, and specifically to a composite driven demoulding device for injection molded parts, comprising an injection molding machine body, the injection molding machine body comprising a fixed mold base, a concave mold fixed on the fixed mold base, a movable mold base and a punch fixed on the movable mold base, the punch being provided with a demoulding device for separating the injection molded parts, the demoulding device comprising a disengagement ring slidably connected to the outer side of the punch, a movable base arranged inside the punch and fixedly connected to the disengagement ring, and a push rod rotatably connected to the movable base, the push rod being connected to a driving device for driving the push rod to move along the length direction of the punch, a sliding groove for sliding the disengagement ring is provided on the outer side of the punch, a filling cloth for filling the sliding groove is provided between a side of the disengagement ring away from the push rod and a side of the sliding groove away from the disengagement ring, during demoulding, the disengagement ring is pushed by the driving device so that the disengagement ring pushes the edge of the injection molded part sleeved on the punch, thereby causing the injection molded part to be separated from the punch, thereby preventing the injection molded part from being stuck on the punch.

Description

Technical Field

[0001] The present application relates to the technical field of demoulding devices, in particular to a composite drive demoulding device for injection molded parts. Background Art

[0002] In the prior art, an injection molding machine is usually used to manufacture injection molded parts. The injection molding machine is usually divided into a female mold and a male mold. The female mold is fixed on a fixed mold base, the male mold is fixed on a movable mold base, the male mold is pushed to close the mold with the female mold to form a mold cavity, and then a plastic fluid is injected into the mold cavity. After the plastic fluid is formed, when the male mold is demolded, the injection molded part may be stuck in the female mold. In order to solve this technical problem, the prior art provides a spring column on the bottom surface of the female mold. After the plastic fluid is injected into the mold cavity, the spring column is pressed to retract into the female mold. When demolding, the male mold is separated from the female mold, and the spring column will push the injection molded part out of the female mold to prevent the injection molded part from being stuck in the female mold.

[0003] However, by pushing the injection molded part out of the die through the spring column, only the injection molded part with a bottom surface can be pushed by the spring column. If the injection molded part is an annular baffle, it will push the edge of the annular injection molded part. This push will cause the annular injection molded part to be sleeved on the punch. For this purpose, a composite drive demolding device for the injection molded part is required. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a composite drive demoulding device for injection molded parts, which is used to solve the technical problem in the prior art that the injection molded parts may get stuck on the punch when the die and the punch are demoulded.

[0005] The above-mentioned purpose of the present application is achieved through the following technical scheme: a composite drive demolding device for injection molded parts, including an injection molding machine body, the injection molding machine body including a fixed mold seat, a die with a casting cavity fixed on the fixed mold seat, a movable mold seat and a punch fixed on the movable mold seat, the punch is provided with a demolding device for separating the injection molded parts, the demolding device includes a disengagement ring slidably connected to the outer side of the punch, a movable seat arranged inside the punch and fixedly connected to the disengagement ring, and a push rod rotatably connected to the movable seat, the push rod is connected to a driving device for driving the push rod to move along the length direction of the punch, a slide groove for sliding the disengagement ring is provided on the outer side of the punch, a filling cloth for filling the slide groove is provided between a side of the disengagement ring away from the push rod and a side of the slide groove away from the disengagement ring, and the diameter of the disengagement ring is larger than the casting cavity of the die.

[0006] Furthermore, the driving device includes a gear track fixedly arranged on the outer side of the fixed mold base, a driving gear arranged in the movable mold base and extending out of the movable mold to engage with the gear track, a worm gear which is concentric with the driving gear and rotatably arranged in the movable mold base, a driven gear which engages with the worm gear and is arranged in the movable mold base, and an active rod which is concentric with the driven gear and rotatably arranged in the movable mold base, wherein the driven gear is fixedly connected to the active rod, the interior of the active rod is hollow and has an internal thread, the outer side of the push rod has an external thread, the push rod is threadedly connected to the active rod, and a limiting structure is provided at the end of the push rod away from the active rod.

[0007] Furthermore, the limiting structure includes a limiting groove provided in the punch and a limiting rod fixedly arranged on the ejector rod and having one end extending into the limiting groove.

[0008] By adopting the above technical solution, in the initial state, the disengagement ring is located at the end of the punch away from the artery seat, and the filling cloth is in a folded state. When the punch and the die are closed, the active gear rotates along the gear track, the rotating active gear drives the worm to rotate, the worm drives the driven gear to rotate, the driven gear drives the active rod to rotate, and the rotating active rod drives the ejector rod to rotate. However, since the ejector rod is restricted by the limit rod and can only move along the length direction of the punch, the rotating active rod drives the ejector rod along the internal thread in the active rod and retracts into the active rod, so that the disengagement ring is attached to the movable die seat, and the filling cloth The cam is extended to fill the slide groove so that the slide groove and the disengagement ring do not affect the clamping of the punch and the die. When demolding, the active gear reverses along the gear track, the active gear drives the worm to reverse, the worm drives the driven gear to reverse, the driven gear drives the active rod to reverse, the reversed active rod drives the push rod along the internal thread in the active rod, extends into the outside of the active rod, and pushes the moving seat, so that the moving seat drives the disengagement ring to move in the direction of the punch away from the movable mold seat, so that the disengagement ring pushes the edge of the injection molded part sleeved on the punch, thereby making the injection molded part detach from the punch to prevent the injection molded part from being stuck on the punch.

[0009] Furthermore, the filling cloth is coated with an anti-plastic adhesion coating, and the anti-plastic adhesion coating is an anti-adhesion agent or an anti-caking agent.

[0010] By adopting the above technical solution, the plastic fluid is prevented from adhering to the filling cloth.

[0011] Furthermore, the release ring is provided with a limiting device for preventing the injection molded part from being stuck in the die during demoulding.

[0012] Furthermore, the limiting device includes two inclined clamping plates arranged on a side of the detachment ring away from the active rod, the two inclined clamping plates are respectively located at the upper and lower ends of the detachment ring, and the end of the inclined clamping plate away from the detachment ring is inclined downward.

[0013] By adopting the above technical scheme, although the arrangement of the demoulding device can prevent the injection molded part from being stuck on the punch, if the injection molded part may be stuck in the die during demoulding, the demoulding device cannot act on the injection molded part, which will cause the injection molded part to be stuck in the die. The arrangement of the limiting device solves this technical problem. When the mold is closed, as the two sides of the release ring are respectively attached to the movable mold seat and the fixed mold seat, the inclined clamping plate that fits the fixed mold seat will extend into the mold cavity. When the plastic fluid flows into the mold cavity, it will wrap around the inclined clamping plate. When the plastic part is finally formed, the side wall of the bottom or top of the plastic part will appear A small inclined groove, and the inclined pallet is located in the inclined groove. The setting of the inclined pallet allows the inclined pallet to take the plastic part away from the die when the punch is demolded to prevent the plastic part from being stuck in the die. However, because the inclined pallet is set on the disengagement ring, when the disengagement ring pushes the plastic part away from the punch, when the disengagement ring pushes most of the plastic part into the punch, the plastic part will tilt downward due to gravity, and the downwardly tilted plastic part will no longer be stuck by the downwardly tilted inclined pallet, so that the inclined pallet can take the plastic part away from the die without affecting the effect of the disengagement ring pushing the plastic part away from the punch.

[0014] Furthermore, the breakaway ring is made of elastic rubber.

[0015] By adopting the above technical solution, the release ring made of elastic rubber can be squeezed by the fixed mold seat after the male mold and the female mold are molded together, so that the gap between the male mold and the female mold after the mold is molded together is filled by the release ring to prevent leakage of plastic fluid.

[0016] Furthermore, a connecting piece is provided between the push rod and the movable seat, and the push rod and the movable seat are connected to each other through the connecting piece. The connecting piece includes a ring fixedly provided on the movable seat, a connecting groove opened on the inner side of the ring, and a connecting piece fixedly provided on the push rod and extending into the connecting groove.

[0017] By adopting the above technical solution, the push rod is connected to the moving seat through the connecting piece, so that when the push rod moves, it can stably drive the moving seat to move.

[0018] Furthermore, a movable groove extending in the direction of the punch away from one end of the movable mold seat is opened in the middle of the slide groove on the two opposite sides of the outside of the punch, and a support block is slidably connected in the movable groove. The support block is used to support the filling cloth to prevent the filling cloth from sinking, and the support block is fixedly connected to the middle part of the filling cloth.

[0019] By adopting the above technical solution, although the filling cloth can fill the slide groove and prevent the slide groove from affecting injection molding, when the mold is closed, the disengagement ring pulls the filling cloth to fill the slide groove, resulting in that although the two ends of the filling cloth are supported, the middle part may sink when subjected to the pressure of the plastic fluid, resulting in bulges on the inner wall of the plastic part. The setting of the support block solves this technical problem. When the disengagement ring unfolds with the filling cloth, the support block slides with the filling cloth. As the disengagement ring is attached to the movable mold seat, the support block also slides to the end of the moving groove close to the movable mold seat, that is, the middle part of the punch. In this way, both ends and the middle part of the filling cloth are supported, thereby preventing the filling cloth from sinking. The support block arranged in the moving groove can also not affect the movement of the disengagement ring. Whether the disengagement ring moves forward or backward, it can drive the support block to move in the moving groove, thereby preventing the support block from affecting the movement of the disengagement ring.

[0020] Furthermore, an opening penetrating to the interior of the movable mold base is provided on one side of the movable mold base, and an opening and closing door hingedly connected to the movable mold base is provided on one side of the opening.

[0021] By adopting the above technical solution, the provision of the opening and the opening and closing door makes it convenient for the staff to repair the driving device in the movable mold base.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] By setting up the demoulding device, the driving device and the limiting structure, it is achieved that the disengagement ring is located at the end of the punch away from the artery seat in the initial state, the filling cloth is in a folded state, and when the punch and the die are closed, the driving gear rotates along the gear track, the rotating driving gear drives the worm to rotate, the worm drives the driven gear to rotate, the driven gear drives the active rod to rotate, and the rotating active rod drives the ejector rod to rotate, but since the ejector rod is restricted by the limiting rod and can only move along the length direction of the punch, the rotating active rod drives the ejector rod along the internal thread in the active rod and retracts into the active rod, so that the disengagement ring is attached to the movable die. The filling cloth is extended to fill the slide groove, so that the slide groove and the disengagement ring do not affect the clamping of the punch and the die. When demolding, the driving gear reverses along the gear track, the driving gear drives the worm to reverse, the worm drives the driven gear to reverse, the driven gear drives the active rod to reverse, the reversed active rod drives the push rod along the internal thread in the active rod, extends into the outside of the active rod, and pushes the moving seat, so that the moving seat drives the disengagement ring to move in the direction of the punch away from the movable mold seat, so that the disengagement ring pushes the edge of the injection molded part sleeved on the punch, thereby making the injection molded part detach from the punch, thereby preventing the injection molded part from being stuck on the punch. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0025] Figure 2 is along Figure 1 Sectional view along line AA;

[0026] Figure 3 yes Figure 2 Enlarged view of part A in the middle;

[0027] Figure 4 This is a diagram showing the demoulding device, filling cloth and inclined clamping plate on the punch when the punch is in the closed mold state.

[0028] Figure numerals: 1. Injection molding machine body; 10. Fixed mold seat; 11. Moving mold seat; 12. Punch; 13. Slide groove; 14. Moving groove; 2. Demolding device; 20. Escape ring; 21. Moving seat; 22. Push rod; 3. Driving device; 30. Gear track; 31. Driving gear; 32. Worm; 33. Driven gear; 34. Driving rod; 4. Filling cloth; 40. Support block; 5. Limit rod; 6. Oblique clamping plate; 7. Connecting piece; 70. Ring; 71. Connecting piece; 8. Opening and closing door. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] Example, see Figure 1 , Figure 2 , Figure 3 as well as Figure 4 , a composite driven demoulding device for injection molded parts, the core component of which is arranged on the injection molding machine body 1. The injection molding machine body 1 includes a fixed mold base 10, a die mounted on the fixed mold base 10, a movable mold base 11, and a punch 12 fixedly mounted on the movable mold base 11. The demoulding device 2 is arranged on the punch 12. The demoulding device 2 includes a disengagement ring 20 slidably connected to the outside of the punch 12, a moving seat 21 arranged inside the punch 12 and extending out of the punch 12 and fixedly connected to the disengagement ring 20, and a push rod 22 rotatably connected to the moving seat 21, and the end of the push rod 22 away from the moving seat 21 is connected to a driving device 3 for driving the push rod 22 to move along the length direction of the punch 12. In order to prevent the disengagement ring 20 from affecting the movement of the push rod 22, a slide groove 13 for smooth sliding of the disengagement ring 20 is specially provided on the outside of the punch 12. In order to maintain the integrity and sealing of the mold, a layer of filling cloth 4 for filling the gap of the slide groove 13 is provided between the side of the release ring 20 away from the ejector pin 22 and the side of the slide groove 13 away from the release ring 20 .

[0031] The driving device 3 includes a gear track 30 fixedly arranged on the outer side of the fixed mold base 10, a driving gear 31 arranged in the movable mold base 11 and extending out of the movable mold base 11 to engage with the gear track 30, a worm 32 that is concentric with the driving gear 31 and is rotatably arranged in the movable mold base 11, a driven gear 33 that is meshed with the worm 32 and is arranged in the movable mold base 11, and an active rod 34 that is concentric with the driven gear 33 and is rotatably arranged in the movable mold base 11, the driven gear 33 is fixedly connected to the active rod 34, the active rod 34 is hollow inside and has an internal thread, the outer side of the ejector rod 22 has an external thread, and the ejector rod 22 is threadedly connected to the active rod 34.

[0032] In order to ensure the stability of the push rod 22 during movement, a limiting structure is provided at one end of the push rod 22 away from the active rod 34. The limiting structure includes a limiting groove provided in the punch 12, and a limiting rod 5 fixedly provided on the push rod 22 and having one end extending into the limiting groove.

[0033] In the initial state, the disengagement ring 20 is located at the end of the punch 12 away from the movable mold base 11, and the filling cloth 4 is in a folded state, ready to fill the chute 13 at any time. When the punch 12 and the die are closed, the active gear 31 will rotate along the gear track 30. This rotation process will drive the rotation of the worm 32, the driven gear 33 and the active rod 34 in turn. However, since the push rod 22 is effectively restricted from rotating by the limit rod 5, it can only move along the length direction of the punch 12. Therefore, as the active rod 34 rotates, the push rod 22 will gradually retract into the inside of the active rod 34 along the internal thread in the active rod 34. In this process, the disengagement ring 20 will move with the push rod 22 towards the movable mold base 11, and the filling cloth 4 will also extend to perfectly fill the gap in the chute 13, ensuring that the closing process of the punch 12 and the die is not disturbed in any way.

[0034] During the demoulding process, the driving gear 31 will rotate in the opposite direction along the gear track 30. This reverse rotation process will also drive the worm 32, the driven gear 33 and the driving rod 34 to rotate in the opposite direction in sequence. As the driving rod 34 rotates in the opposite direction, the push rod 22 will gradually extend out of the driving rod 34 along the internal thread in the driving rod 34. In this process, the push rod 22 will push the moving seat 21 and drive the disengagement ring 20 connected thereto to move in the direction of the punch 12 away from the movable mold seat 11. Finally, the disengagement ring 20 will push the edge of the injection molded part sleeved on the punch 12, so that the injection molded part can be smoothly disengaged from the punch 12, thereby effectively avoiding the injection molded part from being stuck on the punch 12.

[0035] In this embodiment, the filling cloth 4 is coated with an anti-plastic adhesion coating, which is an anti-adhesion agent or an anti-caking agent. The anti-plastic adhesion coating can prevent the plastic fluid from adhering to the filling cloth 4 .

[0036] Although the filling cloth 4 is set to fill the slide groove 13 and prevent the slide groove 13 from affecting the injection molding, when the mold is closed, the disengagement ring 20 pulls the filling cloth 4 to fill the slide groove 13, resulting in that although the two ends of the filling cloth 4 are supported, the middle part may sink when subjected to the pressure of the plastic fluid, resulting in bulges on the inner wall of the plastic part. In order to solve this technical problem, in this embodiment, a movable groove 14 is opened in the middle of the slide groove 13 on the two opposite sides of the outside of the punch 12, extending in the direction of the end of the punch 12 away from the movable mold seat 11, and a support block 40 is slidably connected in the movable groove 14. The support block 40 is used to support the filling cloth 4 to prevent the filling cloth 4 from sinking. The support block 40 It is fixedly connected to the middle part of the filling cloth 4. When the detachment ring 20 is unfolded with the filling cloth 4, the support block 40 slides with the filling cloth 4. As the detachment ring 20 is attached to the movable mold base 11, the support block 40 also slides to the end of the movable groove 14 close to the movable mold base 11, that is, the middle part of the punch 12. In this way, both ends and the middle part of the filling cloth 4 are supported, thereby preventing the filling cloth 4 from sinking. The support block 40 set in the movable groove 14 can also not affect the movement of the detachment ring 20. Whether the detachment ring 20 moves forward or backward, it can drive the support block 40 to move in the movable groove 14, thereby preventing the support block 40 from affecting the movement of the detachment ring 20.

[0037] In this embodiment, the release ring 20 is made of elastic rubber. After the punch 12 and the die are molded together, the release ring 20 made of elastic rubber will be squeezed by the fixed mold base 10, so that the gap between the punch 12 and the die is filled by the release ring 20 to prevent leakage of plastic fluid.

[0038] Although the arrangement of the demoulding device 2 can effectively prevent the injection molded part from getting stuck on the punch 12 during the demoulding process, the main function of the demoulding device 2 is to push the injection molded part away from the punch 12 during the demoulding stage. This characteristic may cause the injection molded part to get stuck inside the die when demoulding. Once the injection molded part is stuck in the die, the demoulding device 2 cannot fully play its due role, resulting in the injection molded part being unable to be demoulded smoothly. In order to solve this technical problem, the present embodiment sets a limit device on the release ring 20, which is used to prevent the injection molded part from getting stuck in the die when demoulding.

[0039] The limiting device includes two inclined clamping plates 6, which are arranged on the side of the detachment ring 20 away from the active rod 34, and are respectively located at the upper and lower parts of the detachment ring 20. The ends of the two inclined clamping plates 6 away from the detachment ring 20 are in a downward tilted state. When the mold is in a mold closing state, the two sides of the detachment ring 20 will fit tightly on the movable mold base 11 and the fixed mold base 10, and the inclined clamping plates 6 of the detachment ring 20 that fit on one side of the fixed mold base 10 will extend into the mold cavity. As the plastic fluid slowly flows into the mold cavity, the plastic fluid will wrap around the inclined clamping plates 6. When the plastic cools and solidifies to finally form an injection molded part, a small inclined groove will be left on the bottom or top side wall of the injection molded part, and the inclined clamping plates 6 will extend into this inclined groove.

[0040] The setting of the inclined clamping plate 6 brings significant benefits. When the punch 12 is demoulding, the inclined clamping plate 6 can hold the injection molded part through the inclined groove and smoothly separate the injection molded part from the die, thereby effectively avoiding the risk of the injection molded part being stuck in the die. However, since the inclined clamping plate 6 is installed on the disengagement ring 20, when the disengagement ring 20 pushes most of the injection molded part to separate from the punch 12, the injection molded part may tilt downward due to the effect of gravity. This downwardly tilted injection molded part can just fall along the downwardly tilted inclined clamping plate 6, thereby preventing the injection molded part inclined clamping plate 6 from being stuck. In this way, while the inclined clamping plate 6 drives the injection molded part to separate from the die, it will not affect the normal function of the disengagement ring 20 to push the injection molded part to separate from the punch 12.

[0041] In this embodiment, a connecting piece 7 is provided between the top rod 22 and the moving seat 21, and the top rod 22 and the moving seat 21 are connected to each other through the connecting piece 7. The connecting piece 7 includes a ring 70 fixedly provided on the moving seat 21, a connecting groove opened on the inner side of the ring 70, and a connecting piece 71 fixedly provided on the top rod 22 and extending into the connecting groove. The top rod 22 is connected to the moving seat 21 through the connecting piece 7, so that when the top rod 22 moves, it can stably drive the moving seat 21 to move.

[0042] In this embodiment, an opening is provided on one side of the movable mold base 11 and passes through the interior of the movable mold base 11. An opening door 8 is provided on one side of the opening and is hingedly connected to the movable mold base 11. The setting of the opening and the opening door 8 makes it convenient for staff to repair the driving device 3 in the movable mold base 11.

[0043] Specific implementation process: In the initial state, the disengagement ring 20 is located at the end of the punch 12 away from the artery seat, and the filling cloth 4 is in a folded state. When the punch 12 and the die are molded together, the disengagement ring 20 is squeezed by the fixed die seat 10, so that the gap between the punch 12 and the die after the die is molded together is filled by the disengagement ring 20. At the same time, the driving gear 31 rotates along the gear track 30, and the rotating driving gear 31 drives the worm 32 to rotate, and the worm 32 drives the driven gear 33 to rotate, and the driven gear 33 drives the active rod 34 to rotate, and the rotating active rod 34 drives the ejector rod 22 to rotate, but because the ejector rod 22 is limited in rotation by the limit rod 5, only It can move along the length direction of the punch 12, so the rotating active rod 34 drives the push rod 22 along the internal thread in the active rod 34 and retracts into the active rod 34, so that the disengagement ring 20 is attached to the movable mold base 11, and the filling cloth 4 is extended to fill the slide groove 13, and drives the support block 40 to slide to the middle of the punch 12, so that the slide groove 13 and the disengagement ring 20 do not affect the clamping of the punch 12 and the die, and then the plastic fluid is injected into the mold cavity. When the plastic fluid flows into the mold cavity, it will wrap the inclined clamping plate 6. When the plastic part is finally formed, a small inclined groove will appear on the side wall of the bottom or top end of the plastic part, and the inclined clamping plate 6 is located in the inclined groove.

[0044] During demoulding, the inclined clamping plate 6 will take the plastic part out of the concave mold to prevent the plastic part from being stuck in the concave mold. At the same time, the driving gear 31 reverses along the gear track 30, the driving gear 31 drives the worm 32 to reverse, the worm 32 drives the driven gear 33 to reverse, the driven gear 33 drives the driving rod 34 to reverse, the reversed active rod 34 drives the ejector rod 22 along the internal thread in the active rod 34, extends into the outside of the active rod 34, and pushes the moving seat 21, so that the moving seat 21 drives the disengagement ring 20 to move the punch 12 away from the movable mold. The seat 11 moves in the direction of the disengagement ring 20, so that the disengagement ring 20 pushes the edge of the injection molded part mounted on the punch 12. When the disengagement ring 20 pushes most of the injection molded part onto the punch 12, the injection molded part will tilt downward due to gravity, and the inclined groove of the downward-inclined injection molded part will be on the same path as the inclined direction of the downward-inclined inclined clamping plate 6, so that the inclined clamping plate 6 no longer clamps the injection molded part, thereby allowing the injection molded part to detach from the punch 12, preventing the injection molded part from being stuck on the punch 12.

[0045] By setting the inclined clamping plate 6, it is realized that when the mold is closed, the two sides of the release ring 20 are respectively attached to the movable mold base 11 and the fixed mold base 10, and the inclined clamping plate 6 that is attached to the fixed mold base 10 will extend into the mold cavity. When the plastic fluid flows into the mold cavity, it will wrap the inclined clamping plate 6. When the plastic part is finally formed, a small inclined groove will appear on the side wall of the bottom or top end of the plastic part, and the inclined clamping plate 6 is located in the inclined groove. The setting of the inclined clamping plate 6 ensures that when the punch 12 is demolded, the inclined clamping plate 6 will take the plastic part away from the concave mold to prevent the plastic part from being stuck in the concave mold. However, because the inclined clamping plate 6 is arranged on the disengagement ring 20, when the disengagement ring 20 pushes the plastic part to disengage from the punch 12, when the disengagement ring 20 pushes most of the plastic part to the punch 12, the plastic part will tilt downward due to gravity, and the downward tilted plastic part will no longer be clamped by the downward tilted inclined clamping plate 6, so that the inclined clamping plate 6 can take the plastic part away from the die without affecting the effect of the disengagement ring 20 pushing the plastic part to disengage from the punch 12, thereby further improving the demolding efficiency of the injection molding machine.

[0046] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A composite driven demoulding device for injection molded parts, comprising an injection molding machine body (1), wherein the injection molding machine body (1) comprises a fixed mold base (10), a concave mold fixed on the fixed mold base (10), a movable mold base (11) and a convex mold (12) fixed on the movable mold base (11), characterized in that: The punch (12) is provided with a demoulding device (2) for separating the injection molded parts, the demoulding device (2) comprising a disengagement ring (20) slidably connected to the outer side of the punch (12), a movable seat (21) arranged inside the punch (12) and fixedly connected to the disengagement ring (20), and a push rod (22) rotatably connected to the movable seat (21), the push rod (22) being connected to a driving device (3) for driving the push rod (22) to move along the length direction of the punch (12), a sliding groove (13) for the disengagement ring (20) to slide is provided on the outer side of the punch (12), and a filling cloth (4) for filling the sliding groove (13) is provided between a side of the disengagement ring (20) away from the push rod (22) and a side of the sliding groove (13) away from the disengagement ring (20).

2. A composite drive demoulding device for injection molded parts according to claim 1, characterized in that: The driving device (3) comprises a gear track (30) fixedly arranged on the outer side of the fixed mold base (10), a driving gear (31) arranged in the movable mold base (11) and extending out of the movable mold to engage with the gear track (30), a worm (32) coaxial with the driving gear (31) and rotatably arranged in the movable mold base (11), a driven gear (33) meshing with the worm (32) and arranged in the movable mold base (11), and a driving rod (34) coaxial with the driven gear (33) and rotatably arranged in the movable mold base (11), wherein the driven gear (33) is fixedly connected to the driving rod (34), the active rod (34) is hollow inside and has an internal thread, the outer side of the push rod (22) has an external thread, the push rod (22) is threadedly connected to the active rod (34), and a limiting structure is provided at one end of the push rod (22) away from the active rod (34).

3. A composite drive demoulding device for injection molded parts according to claim 2, characterized in that: The limiting structure comprises a limiting groove formed in the punch (12) and a limiting rod (5) fixedly arranged on the top rod (22) and with one end extending into the limiting groove.

4. The composite drive demoulding device for injection molded parts according to claim 1, characterized in that: The filling cloth (4) is coated with an anti-plastic adhesion coating, and the anti-plastic adhesion coating is an anti-adhesion agent or an anti-caking agent.

5. The composite drive demoulding device for injection molded parts according to claim 1, characterized in that: The release ring (20) is provided with a limiting device for preventing the injection molded part from being stuck in the die during demoulding.

6. A composite drive demoulding device for injection molded parts according to claim 5, characterized in that: The limiting device comprises two inclined clamping plates (6) arranged on a side of the detachment ring (20) away from the active rod (34), the two inclined clamping plates (6) are respectively located at the upper and lower ends of the detachment ring (20), and the end of the inclined clamping plate (6) away from the detachment ring (20) is inclined downward.

7. The composite drive demoulding device for injection molded parts according to claim 1, characterized in that: The release ring (20) is made of elastic rubber.

8. The composite drive demoulding device for injection molded parts according to claim 1, characterized in that: A connecting piece (7) is provided between the push rod (22) and the movable seat (21), and the push rod (22) and the movable seat (21) are connected to each other via the connecting piece (7). The connecting piece (7) comprises a collar (70) fixedly arranged on the movable seat (21), a connecting groove provided on the inner side of the collar (70), and a connecting piece (71) fixedly arranged on the push rod (22) and extending into the connecting groove.

9. The composite drive demoulding device for injection molded parts according to claim 1, characterized in that: A movable groove (14) extending in a direction away from one end of the movable mold seat (11) and away from the movable mold seat (11) is provided in the middle of the slide groove (13) on two opposite sides of the outside of the punch (12). A support block (40) is slidably connected in the movable groove (14). The support block (40) is used to support the filling cloth (4) to prevent the filling cloth (4) from sinking. The support block (40) is fixedly connected to the middle part of the filling cloth (4).

10. The composite drive demoulding device for injection molded parts according to claim 1, characterized in that: An opening penetrating to the interior of the movable mold base (11) is provided on one side of the movable mold base (11), and an opening and closing door (8) hingedly connected to the movable mold base (11) is provided on one side of the opening.

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