Front mold floating core pulling mechanism for automobile plastic parts

Abstract

The utility model belongs to mould technical field relates to a car plastic part front mould floating core pulling demoulding mechanism. The utility model, including car plastic part injection molding upper die and car plastic part injection molding lower die, be equipped with injection molding mainboard on the car plastic part injection molding upper die, be equipped with two forming upper inlay in the car plastic part injection molding upper die, be equipped with forming lower inlay seat in the car plastic part injection molding lower die, when two forming upper inlay and forming lower inlay seat are pasted together, form two complete cavities, be equipped with the floating core pulling demoulding assembly that can move along the side of approaching or far away cavity in the forming upper inlay, be equipped with the sliding connection spare of extending into to forming upper inlay and being used for driving floating core pulling demoulding assembly movement in the car plastic part injection molding upper die. The utility model in the use, through the floating core pulling demoulding assembly of unique design, realize the synchronous forming of side hole when injection molding, safe core pulling demoulding when opening mould, effectively avoid side hole damage, improve plastic part quality greatly.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a floating core-pulling demolding mechanism for the front mold of automotive plastic parts. Background Technology

[0002] In the injection molding production of automotive plastic parts, the structures of these parts are becoming increasingly complex, placing higher demands on the mold's demolding mechanism. Traditional demolding mechanisms often encounter problems such as side hole damage and demolding interference when handling plastic parts with special bottom structures. For example, ordinary core-pulling methods can easily cause defects such as deformation and cracking of side holes during demolding due to poor control of the core-pulling direction and force. For plastic parts with irregular bottom structures, traditional demolding methods may cause the plastic part to jam with the mold, which not only reduces production efficiency but also increases the defect rate, making it difficult to meet the automotive industry's requirements for high precision and high quality plastic parts. Therefore, there is an urgent need to design a floating core-pulling demolding mechanism for the front mold of automotive plastic parts that can overcome the above defects. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a floating core-pulling demolding mechanism for the front mold of automotive plastic parts.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A floating core-pulling demolding mechanism for a front mold of an automotive plastic part includes an upper injection mold and a lower injection mold. The upper injection mold has a main injection board above it, and two upper molding inserts are located within it. The lower injection mold has a lower molding seat. When the two upper molding inserts and the lower molding seat are in contact, two complete cavities are formed. Each upper molding insert has a floating core-pulling demolding component that can move along a side close to or away from the cavity. The upper injection mold has a sliding connector extending into the upper molding inserts and used to drive the floating core-pulling demolding component. The lower injection mold has an ejector that can reciprocate linearly in the vertical direction below it. The lower molding seat has a bottom-supporting inclined ejector.

[0005] In the above-mentioned floating core-pulling demolding mechanism for automotive plastic parts front mold, the floating core-pulling demolding assembly includes a plurality of side core-pulling pillars disposed in the molding upper insert. The head of the side core-pulling pillar is provided with a side hole molding head, and the tail of the side core-pulling pillar is slidably engaged with a sliding connector.

[0006] In the above-mentioned floating core-pulling and demolding mechanism for the front mold of automotive plastic parts, the sliding connector includes a connecting slider disposed in the upper mold of the automotive plastic part injection and extending into the upper molding insert. The connecting slider is provided with an inclined slide groove. The tail of the side core-pulling column is provided with a limiting slide that extends into the inclined slide groove and slides in cooperation with the inclined slide groove. When the connecting slider moves upward, the limiting slide slides along the trajectory of the inclined slide groove, driving the side core-pulling column to move away from the cavity.

[0007] In the above-mentioned floating core-pulling demolding mechanism for automotive plastic parts front mold, the bottom-side support inclined demolding component includes a bottom-side support molding slider disposed in the molding lower insert, and the bottom-side support molding slider corresponds to the position of the cavity.

[0008] In the above-mentioned floating core-pulling demolding mechanism for automotive plastic parts front mold, the bottom side supporting molding slider is provided with a side sliding seat at its tail, and the molding lower insert is provided with a limiting strip, and the side sliding seat and the limiting strip are in sliding cooperation.

[0009] In the above-mentioned floating core-pulling and demolding mechanism for the front mold of automotive plastic parts, the ejector includes an ejector fixing plate disposed below the lower mold of the automotive plastic part injection molding. The ejector fixing plate is provided with a plurality of straight ejector rods, and the top of the straight ejector rods is provided with an arc-shaped top surface block.

[0010] In the above-mentioned floating core-pulling demolding mechanism for automotive plastic parts front mold, the bottom of the ejector fixing plate is provided with a fixing base plate, and the fixing base plate is provided with two anti-deviation irons, and the ejector fixing plate and the anti-deviation irons are in sliding cooperation.

[0011] In the aforementioned floating core-pulling and demolding mechanism for automotive plastic parts, the injection molding main board is equipped with an injection tube.

[0012] In the aforementioned floating core-pulling demolding mechanism for automotive plastic parts, the upper molding insert is equipped with an upper cooling water pipe assembly.

[0013] In the aforementioned floating core-pulling and demolding mechanism for automotive plastic parts, a lower cooling water pipe assembly is provided inside the molding lower insert.

[0014] Compared with existing technologies, the advantages of this utility model are: 1. In use, this utility model achieves simultaneous molding of side holes during injection molding through a uniquely designed floating core-pulling demolding component, and ensures safe core-pulling demolding during mold opening, effectively avoiding damage to side holes and significantly improving the quality of plastic parts.

[0015] 2. The working method of the bottom side support inclined ejector in this utility model, which combines inclined side ejection with ejection, avoids demolding interference, significantly improves demolding efficiency, and shortens the production cycle.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a partial structural schematic diagram of the present invention.

[0019] Figure 3 This is a partial structural schematic diagram of another aspect of this utility model.

[0020] Figure 4 This is a partial structural schematic diagram of another aspect of this utility model.

[0021] In the diagram: 1. Upper mold for automotive plastic parts injection; 2. Lower mold for automotive plastic parts injection; 3. Main injection board; 4. Upper molding insert; 5. Lower molding insert; 6. Floating core-pulling demolding assembly; 7. Sliding connector; 8. Ejector; 9. Bottom side support inclined ejector; 10. Side core-pulling column; 11. Side hole molding head; 12. Connecting slider; 13. Inclined slide groove; 14. Limiting slide; 15. Bottom side support molding slider; 16. Side slide seat; 17. Limiting strip; 18. Ejector fixing plate; 19. Straight ejector rod; 20. Arc-shaped top surface ejector block; 21. Fixed base plate; 22. Anti-deviation iron; 23. Injection tube; 24. Upper cooling water pipe assembly; 25. Lower cooling water pipe assembly. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1-4 As shown, a floating core-pulling demolding mechanism for a front mold of an automotive plastic part includes an upper injection mold 1 and a lower injection mold 2. An injection main board 3 is provided above the upper injection mold 1. Two upper molding inserts 4 are provided inside the upper injection mold 1. A lower molding seat 5 is provided inside the lower injection mold 2. When the two upper molding inserts 4 and the lower molding seat 5 are in contact, two complete cavities are formed. A floating core-pulling demolding component 6, movable along the side close to or away from the cavity, is provided inside the upper injection mold 1. A sliding connector 7, extending into the upper molding inserts 4 and used to drive the floating core-pulling demolding component 6, is provided below the lower injection mold 2. An ejector 8, capable of reciprocating linear motion in the vertical direction, is provided below the lower injection mold 2. A bottom-side supporting inclined ejector 88 is provided inside the lower molding seat 5.

[0024] In this embodiment, during the injection molding process, the injection main board 3 serves to support the injection tube 21 and provide a channel for conveying injection materials. Two upper molding inserts 4 are installed inside the upper mold 1 for automotive plastic parts, and a lower molding seat 5 is provided inside the lower mold 2. When the mold is closed, the two upper molding inserts 4 precisely fit with the lower molding seat 5, forming two complete cavities, providing precise space for the injection molding of the plastic part. A floating core-pulling demolding component 6 that can move flexibly is provided inside the upper molding insert 4. A sliding connector 7 extending into the upper molding insert 4 is also provided inside the upper mold 1 for automotive plastic parts. The two components work together to achieve the core-pulling demolding action of the side holes, avoiding damage to the side holes and ensuring high-quality plastic parts. An ejector 8 that can reciprocate linearly in the vertical direction is provided below the lower mold 2 for automotive plastic parts. A bottom-supporting inclined ejector 88 is provided inside the lower molding seat 5. These two components work together to complete the demolding of the bottom structure of the plastic part and the overall ejection of the plastic part.

[0025] Combination Figure 1-4 As shown, the floating core-pulling demolding assembly 6 includes a plurality of side core-pulling pillars 9 disposed in the molding upper insert 4. The head of the side core-pulling pillar 9 is provided with a side hole molding head 10, and the tail of the side core-pulling pillar 9 is slidably engaged with the sliding connector 7.

[0026] Specifically, the floating core-pulling and demolding assembly 6 mainly consists of several side core-pulling pillars 9, which are set inside the molding insert 4. The heads of the side core-pulling pillars 9 are equipped with side hole forming heads 10. During the injection molding stage, when the high-temperature molten injection material is injected into the cavity, the side hole forming heads 10 are surrounded by material, thus simultaneously forming the side hole structure of the plastic part. The tails of the side core-pulling pillars 9 maintain a sliding fit with the sliding connector 7, providing a motion basis for subsequent core-pulling and demolding actions.

[0027] The sliding connector 7 includes a connecting slider 11 disposed in the upper mold 1 of the automotive plastic injection and extending into the upper molding insert 4. The connecting slider 11 is provided with an inclined slide groove 12. The tail of the side core pull column 9 is provided with a limiting slide 13 that extends into the inclined slide groove 12 and slides with the inclined slide groove 12. When the connecting slider 11 moves upward, the limiting slide 13 slides along the trajectory of the inclined slide groove 12, driving the side core pull column 9 to move away from the cavity.

[0028] In this embodiment, when the upper mold 1 of the automotive plastic injection molding moves upward to open the mold, the connecting slider 11 moves upward accordingly. At this time, the limiting slide 13 slides along a specific trajectory in the inclined slide 12. Due to the inclined angle design of the inclined slide 12, the sliding of the limiting slide 13 drives the side core-pulling column 9 to move away from the cavity, thereby completing the side hole core-pulling demolding action. By utilizing the ingenious cooperation between the inclined slide 12 and the limiting slide 13, the linear motion of the connecting slider 11 is accurately converted into the lateral motion of the side core-pulling column 9, realizing a smooth and efficient operation of side hole core-pulling demolding, which greatly improves the reliability of core-pulling demolding and the quality of the side hole of the plastic part.

[0029] Combination Figure 3 , Figure 4 As shown, the bottom support inclined ejector 88 includes a bottom support molding slider 133 disposed in the molding lower insert 5. The bottom support molding slider 133 is positioned corresponding to the cavity. The bottom support molding slider 133 is provided with a side slide seat 14 at its tail. The molding lower insert 5 is provided with a limiting strip 15. The side slide seat 14 and the limiting strip 15 slide in cooperation.

[0030] In this embodiment, during the injection molding process, the bottom-side support molding slider 133 shapes the bottom end of the plastic part. A side slide seat 14 is installed at the tail of the bottom-side support molding slider 133, and a limiting strip 15 is provided within the molding lower insert 5. The side slide seat 14 and the limiting strip 15 form a sliding fit. During the demolding stage, as the mold moves, the bottom-side support molding slider 133, constrained by the side slide seat 14 and the limiting strip 15, performs a side-demolding movement along a specific oblique direction. The bottom-side support molding slider 133 ensures precise shaping of the bottom end of the plastic part, while the cooperation between the side slide seat 14 and the limiting strip 15 ensures that the bottom-side support molding slider 133 can move along a predetermined oblique trajectory during demolding, effectively avoiding interference with the plastic part and other mold components, ensuring the integrity of the bottom structure of the plastic part and smooth demolding.

[0031] Combination Figure 1-4 As shown, the ejector 8 includes an ejector fixing plate 16 disposed below the lower mold 2 for automotive plastic parts injection molding. The ejector fixing plate 16 is provided with a plurality of straight ejector rods 17, and the top of the straight ejector rods 17 is provided with an arc-shaped top surface block 18.

[0032] In this embodiment, after the bottom support oblique ejector 88 completes the oblique lateral ejection action, the ejector fixing plate 16 moves upward in a straight line under the action of the external driving device. The ejection force is transmitted to the arc-shaped top surface block 18 through the straight ejector rod 17. The arc-shaped top surface block 18 contacts the plastic part and ejects the molded plastic part from the mold. The bottom of the ejector fixing plate 16 is provided with a fixing base plate 19. Two anti-deviation irons 20 are installed on the fixing base plate 19. The ejector fixing plate 16 and the anti-deviation irons 20 form a sliding fit. The design of the arc-shaped top surface block 18 increases the contact area with the plastic part, making the ejection force distribution more uniform and avoiding local damage to the plastic part during ejection. The cooperation between the anti-deviation irons 20 and the fixing base plate 19 ensures the stability and accuracy of the ejector fixing plate 16 during the movement process, prevents it from deviating, and ensures that the plastic part can be ejected accurately and smoothly.

[0033] The bottom of the ejector fixing plate 16 is provided with a fixing base plate 19, and two anti-deviation irons 20 are provided on the fixing base plate 19. The ejector fixing plate 16 and the anti-deviation irons 20 are slidably engaged.

[0034] In this embodiment, during the up-and-down sliding process of the ejector fixing plate 16, the anti-deviation iron 20 can limit the ejector fixing plate 16.

[0035] Combination Figure 1-3 As shown, the injection molding main board 3 is provided with an injection molding tube 21.

[0036] In this embodiment, the injection molding main board 3 is provided with an injection tube 21. The injection tube 21 passes through the injection molding main board 3, with one end connected to the injection molding equipment and the other end aligned with the cavity formed by the upper molding insert 4 and the lower molding insert 5. During the injection molding process, the injection molding equipment injects the high-temperature molten injection molding material into the cavity through the injection tube 21 to complete the injection molding of the plastic part.

[0037] Combination Figure 1-3 As shown, the upper insert 4 is provided with an upper cooling water pipe assembly 22.

[0038] In this embodiment, the upper cooling water pipe assembly 22 is provided inside the upper molding insert 4. The upper cooling water pipe assembly 22 is arranged in a specific manner inside the upper molding insert 4. After injection molding is completed, the cooling medium circulates through the upper cooling water pipe assembly 22, carrying away the heat of the upper molding insert 4 and accelerating the cooling and solidification process of the plastic part in the cavity.

[0039] Combination Figure 1-3 As shown, the lower molding seat 5 is provided with a lower cooling water pipe assembly 23.

[0040] In this embodiment, the lower molding insert 5 is provided with a lower cooling water pipe assembly 23, whose layout and working principle are similar to those of the upper cooling water pipe assembly 22. The cooling medium circulates in the lower cooling water pipe assembly 23 in the lower molding insert 5 to cool the lower molding insert 5. Together with the upper cooling water pipe assembly 22, it accelerates the overall cooling and solidification of the plastic part.

[0041] The working principle of this utility model is as follows: During the injection molding stage, the injection molding equipment injects the high-temperature molten injection material through the injection tube 21 inside the injection main plate 3 into the cavity composed of the upper molding insert 4 and the lower molding seat 5. At this time, the side hole molding head 10 and the bottom side support molding slider 133 simultaneously mold the side hole and bottom end of the plastic part, respectively. Meanwhile, the cooling medium circulating in the upper cooling water pipe group 22 and the lower cooling water pipe group 23 cools the mold and accelerates the solidification of the plastic part. When the mold is opened, the upper mold 1 for the automotive plastic part injection first moves upward, and the connecting slider 11 follows. The upper mold moves upward together with the lower mold. The upward movement of the connecting slider 11, through the cooperation of the inclined slide 12 and the limiting slide 13, drives the side core-pulling column 9 to move away from the cavity, completing the side hole core-pulling demolding. Then, the ejector fixing plate 16 below the lower mold 2 of the automotive plastic part injection moves upward under the external driving action. The bottom side supporting molding slider 133 is obliquely demolded under the constraint of the side slide 14 and the limiting strip 15. At the same time, the straight ejector rod 17 and the arc-shaped top surface block 18 eject the plastic part from the mold, completing the entire demolding process.

[0042] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0043] Although this article frequently uses terms such as upper injection mold 1 for automotive plastic parts, lower injection mold 2 for automotive plastic parts, injection main board 3, upper molding insert 4, lower molding insert 5, floating core-pulling demolding assembly 6, sliding connector 7, ejector 8, bottom side support inclined ejector 88, side core-pulling pillar 9, side hole molding head 10, connecting slider 11, inclined slide groove 12, limiting slide 13, bottom side support molding slider 133, side slide seat 14, limiting strip 15, ejection fixing plate 16, straight ejector rod 17, arc-shaped top surface ejector block 18, fixing base plate 19, anti-deviation iron 20, injection pipe 21, upper cooling water pipe assembly 22, lower cooling water pipe assembly 23, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A floating core-pulling demolding mechanism for a front mold of an automotive plastic part, comprising an upper injection mold (1) and a lower injection mold (2) for an automotive plastic part, characterized in that, The upper mold (1) for automotive plastic parts is provided with an injection main board (3). The upper mold (1) for automotive plastic parts is provided with two molding upper inserts (4). The lower mold (2) for automotive plastic parts is provided with a molding lower insert (5). When the two molding upper inserts (4) and the molding lower insert (5) are in contact, two complete cavities are formed. The upper mold (4) is provided with a floating core-pulling demolding assembly (6) that can move along the side close to or away from the cavity. The upper mold (1) for automotive plastic parts is provided with a sliding connector (7) that extends into the upper mold (4) and is used to drive the floating core-pulling demolding assembly (6) to move. The lower mold (2) for automotive plastic parts is provided with an ejector (8) that can reciprocate linearly in the vertical direction. The lower insert (5) is provided with a bottom-side supporting oblique ejector (88).

2. The floating core-pulling demolding mechanism for automotive plastic parts front molds according to claim 1, characterized in that, The floating core-pulling demolding assembly (6) includes a plurality of side core-pulling pillars (9) disposed in the molding upper insert (4). The head of the side core-pulling pillar (9) is provided with a side hole molding head (10), and the tail of the side core-pulling pillar (9) is slidably engaged with the sliding connector (7).

3. The floating core-pulling demolding mechanism for automotive plastic parts front molds according to claim 2, characterized in that, The sliding connector (7) includes a connecting slider (11) disposed in the upper mold (1) of the automotive plastic injection molding and extending into the upper molding insert (4). The connecting slider (11) is provided with an inclined groove (12). The tail of the side core pull column (9) is provided with a limiting slide (13) extending into the inclined groove (12) and slidingly engaging with the inclined groove (12). When the connecting slider (11) moves upward, the limiting slide (13) slides along the trajectory of the inclined groove (12), driving the side core pull column (9) to move away from the cavity.

4. The floating core-pulling demolding mechanism for automotive plastic parts front molds according to claim 3, characterized in that, The bottom support oblique ejector (88) includes a bottom support molding slider (133) disposed in the molding lower insert (5), and the bottom support molding slider (133) corresponds to the position of the cavity.

5. The floating core-pulling demolding mechanism for automotive plastic parts front molds according to claim 4, characterized in that, The bottom side support forming slider (133) is provided with a side slide seat (14) at its tail, and the forming lower insert (5) is provided with a limiting strip (15). The side slide seat (14) and the limiting strip (15) slide in cooperation.

6. The floating core-pulling demolding mechanism for automotive plastic parts front molds according to claim 5, characterized in that, The ejector (8) includes an ejector fixing plate (16) disposed below the lower mold (2) for automotive plastic injection molding. The ejector fixing plate (16) is provided with a plurality of straight ejector rods (17), and the top of the straight ejector rods (17) is provided with an arc-shaped top surface block (18).

7. The floating core-pulling demolding mechanism for automotive plastic parts front molds according to claim 6, characterized in that, The bottom of the ejector fixing plate (16) is provided with a fixing base plate (19), and two anti-deviation irons (20) are provided on the fixing base plate (19). The ejector fixing plate (16) and the anti-deviation irons (20) are slidably engaged.

8. The floating core-pulling demolding mechanism for automotive plastic parts front mold according to claim 1, characterized in that, The injection molding main board (3) is provided with an injection molding tube (21).

9. The floating core-pulling demolding mechanism for automotive plastic parts front molds according to claim 1, characterized in that, The upper insert (4) is provided with an upper cooling water pipe assembly (22).

10. The floating core-pulling demolding mechanism for automotive plastic parts front molds according to claim 1, characterized in that, The molded lower insert (5) is provided with a lower cooling water pipe assembly (23).

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