Large-angle double-inclined ejection mechanism for automobile interior part injection mold

Abstract

The utility model belongs to mould technical field relates to a big angle double bevel ejection mechanism of automobile interior part injection mold. The utility model, including interior part forming upper die and interior part forming lower die, be equipped with injection part in the upper die of interior part forming, be equipped with auxiliary forming spare and big angle double bevel ejection mechanism in the lower die of interior part forming. The utility model in the using process, adopt double bevel symmetrical layout and oblique sliding fit structure, realized the big angle side part ejection of >=25 DEG, broke through the angle limit of traditional bevel mechanism, through the collaborative work mode of double bevel and straight top ejection spare, realized the compound ejection action of multi -dimensional, phased, guaranteed the even force of product, effectively avoided the deformation.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a large-angle double-sloping ejector mechanism for injection molds of automotive interior parts. Background Technology

[0002] With the development of the automotive industry, consumers have placed higher demands on the aesthetics, functionality, and comfort of automotive interiors. This has led to increasingly complex structural designs for automotive interior parts, especially those with large-angle side concavities and undercuts. Demolding these complex structures during injection molding has become a technical challenge. Existing demolding solutions for such structures have several drawbacks: traditional single-slope ejector mechanisms have limited demolding angles (typically ≤10°), failing to meet the demolding requirements of large-angle side concavities; while multiple independently driven slope ejector mechanisms can achieve larger-angle demolding, they suffer from bulky structures, difficulty in coordinating movements, and susceptibility to interference; while core-pulling mechanisms can solve the side concavity problem, they significantly increase mold manufacturing costs and make maintenance difficult for symmetrically distributed double-sided concavity structures. Furthermore, existing demolding mechanisms often focus only on demolding in one direction, neglecting the force balance of the product during demolding, easily causing product deformation, surface damage, and other quality problems. Therefore, there is an urgent need to develop a large-angle double-slope ejector demolding mechanism for automotive interior parts injection molds that can achieve large-angle, simultaneous double-sided demolding with a compact structure and coordinated movements.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses an injection mold for automotive interior parts [Application No.: 202010525284.1], which includes a mounting base, an inverted U-shaped mounting bracket on the upper end of the mounting base, an electric push rod on the upper end of the mounting bracket, a lower mold body embedded in the upper end of the mounting base, an upper mold body that mates with the lower mold body above the mounting base, the telescopic end of the electric push rod passing through the mounting bracket and fixedly connected to the upper end of the upper mold body, two symmetrical sliding grooves on the upper end of the mounting base, a guide mechanism for guiding the upper mold body in both sliding grooves, an injection port for injection at the upper end of the upper mold body, and two symmetrical transverse grooves in the mounting base, which are respectively connected to the two sliding grooves. However, this solution still has the drawback of difficulty in achieving large-angle, simultaneous demolding on both sides during use. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a large-angle double-sloping ejector mechanism for injection molds of automotive interior parts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A large-angle double-sloping ejector mechanism for an injection mold of automotive interior parts includes an upper mold and a lower mold. An injection molded part is disposed above the upper mold, and an auxiliary molding part and a large-angle double-sloping ejector mechanism are disposed inside the lower mold. When the upper mold and the lower mold are fitted together, a complete cavity is formed between the upper mold, the lower mold, the auxiliary molding part, and the large-angle double-sloping ejector mechanism. A straight ejector is disposed below the lower mold, and the straight ejector and the large-angle double-sloping ejector mechanism are staggered.

[0007] In the above-mentioned large-angle double-sloping ejector demolding mechanism for automotive interior parts injection molds, the large-angle double-sloping ejector demolding mechanism includes two sloping ejector demolding slides disposed below the upper mold of the interior parts forming mold. The two sloping ejector demolding slides are symmetrically arranged with each other, and the sloping ejector demolding slides are staggered with the auxiliary forming parts.

[0008] In the aforementioned large-angle double-sloping-top ejector mechanism for automotive interior parts injection molds, the inner side of the sloping-top ejector slide has a side forming surface for the interior parts.

[0009] In the above-mentioned large-angle double-sloping ejector demolding mechanism of the automotive interior parts injection mold, the upper mold of the interior parts forming is provided with two inclined connecting slide rods. The inclined connecting slide rods pass through the inclined ejector demolding slide block, and the inclined ejector demolding slide block slides are in sliding engagement with the inclined connecting slide rods.

[0010] In the aforementioned large-angle double-sloping ejector mechanism for automotive interior parts injection molds, the included angle between the centerlines of the two inclined connecting slide rods is an acute angle.

[0011] In the aforementioned automotive interior parts injection mold large-angle double-sloping-top demolding mechanism, the auxiliary molding component includes an auxiliary molding plate disposed below the upper mold of the interior parts molding, and the auxiliary molding plate is staggered with two sloping-top demolding slides.

[0012] In the above-mentioned large-angle double-sloping ejector demolding mechanism for automotive interior parts injection molds, the straight ejector demolding component includes an ejector rod fixing slide plate disposed on the lower mold of the interior parts forming mold, the ejector rod fixing slide plate is provided with a plurality of straight ejector rods, and the top of the straight ejector rod is provided with an ejector block.

[0013] In the above-mentioned large-angle double-sloping ejector mechanism for automotive interior parts injection molds, the ejector pin fixing slide is also provided with a side forming surface ejector pin, and the side forming surface ejector pin corresponds to the position of the side forming surface of the interior part.

[0014] In the aforementioned large-angle double-sloping ejector mechanism for automotive interior parts injection molds, the injection molded part includes an injection main plate and an injection manifold plate disposed above the upper mold for molding the interior parts.

[0015] In the aforementioned large-angle double-sloping-top demolding mechanism for automotive interior parts injection molds, cooling water pipe assemblies are provided inside the upper mold and lower mold for interior parts forming.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. In use, this utility model adopts a double-sloping top symmetrical layout and a sloping sliding cooperation structure to achieve a large-angle side demolding of ≥25°, breaking through the angle limitation of traditional sloping top mechanisms. Through the collaborative working mode of double sloping tops and straight top demolding parts, it realizes multi-dimensional and phased composite demolding action, ensuring uniform stress on the product and effectively avoiding deformation.

[0018] 2. The demolding components in this utility model adopt an interlaced spatial layout, which realizes interference-free movement within the limited mold space and significantly improves the compactness of the mold structure.

[0019] 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

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a cross-sectional view of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of the present invention.

[0023] Figure 4 This is a partial structural schematic diagram of another aspect of this utility model.

[0024] In the diagram: 1. Upper mold for interior trim molding; 3. Injection part; 4. Auxiliary molding part; 5. Large-angle double-sloping ejector mechanism; 6. Straight ejector part; 7. Sloping ejector slide block; 8. Side molding surface of interior trim; 9. Sloping connecting slide bar; 10. Auxiliary molding insert; 11. Ejector pin fixing slide plate; 12. Straight ejector pin; 13. Ejector block; 14. Side molding surface ejector pin; 15. Injection main board; 16. Injection manifold; 17. Cooling water pipe assembly. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4As shown, a large-angle double-sloping ejector mechanism for an injection mold of automotive interior parts includes an upper mold 1 and a lower mold. An injection molded part 3 is provided above the upper mold 1. An auxiliary molding part 4 and a large-angle double-sloping ejector mechanism 5 are provided inside the lower mold. When the upper mold 1 and the lower mold are fitted together, a complete cavity is formed between the upper mold 1, the lower mold, the auxiliary molding part 4, and the large-angle double-sloping ejector mechanism 5. A straight ejector 6 is provided below the lower mold. The straight ejector 6 and the large-angle double-sloping ejector mechanism 5 are staggered.

[0027] In this embodiment, during the injection molding process, the injection molded part 3 is connected to an external injection molding machine, responsible for injecting molten plastic into the mold cavity. An auxiliary molding part 4 and a large-angle double-sloping ejector mechanism 5 are installed inside the lower mold of the interior trim part. The auxiliary molding part 4 is located in the middle of the cavity, and the large-angle double-sloping ejector mechanism 5 is symmetrically distributed on both sides of the auxiliary molding part 4. When the mold is in a closed state, the lower surface of the upper mold 1, the upper surface of the lower mold, the outer surface of the auxiliary molding part 4, and the inner surface of the large-angle double-sloping ejector mechanism 5 together form a shape that is identical to the automotive interior trim part to be molded. The fully matched closed cavity has a straight ejector 6 located below the lower mold of the interior part forming mold. The top of the straight ejector 6 penetrates the bottom plate of the lower mold of the interior part forming mold and extends into the bottom of the cavity. It is spatially staggered with the large-angle double-sloping ejector mechanism 5. That is, the ejection position of the straight ejector 6 avoids the movement trajectory of the large-angle double-sloping ejector mechanism 5, which breaks through the limitation of the single-direction movement of the traditional ejector mechanism. Through the spatial staggered layout and coordinated action of multiple components, the one-time complete demolding of complex structure products is realized, which solves the demolding problem of large-angle side concave structure. The lower mold of the interior part forming mold is not shown in the figure.

[0028] Combination Figure 1-4 As shown, the large-angle double-sloping-top demolding mechanism 5 includes two sloping-top demolding slides 7 disposed below the upper mold 1 for interior parts forming. The two sloping-top demolding slides 7 are symmetrically arranged, and the sloping-top demolding slides 7 are staggered with the auxiliary forming parts 4.

[0029] Specifically, the bottom of the inclined ejector slide 7 is connected to the lower mold of the interior part forming through a slider guide structure, and can slide horizontally; its top is in sliding fit with the lower surface of the upper mold 1 of the interior part forming. The inclined ejector slide 7 and the auxiliary forming part 4 are staggered – that is, there is a certain gap between the two sides of the auxiliary forming part 4 and the inner side of the inclined ejector slide 7, and the height of the auxiliary forming part 4 is slightly lower than the height of the inclined ejector slide 7, forming a stepped structure. The two inclined ejector slides 7 are linked by a synchronous linkage mechanism to ensure the symmetry of the movement. The inclined ejector slide 7 and the auxiliary forming part 4 maintain a gap of 0.1-0.2mm, which not only ensures the sealing of the cavity, but also avoids mutual friction during movement. The symmetrical double slide design realizes simultaneous large-angle demolding on both sides. Compared with the single-sided inclined ejector structure, it significantly improves the stability of the demolding process and the product quality.

[0030] The inclined top demolding slide 7 has an interior part side molding surface 8 on its inner side.

[0031] In this embodiment, the side molding surface 8 of the interior trim directly participates in the product molding process, ensuring the accuracy and surface quality of the product's side structure; the molding function and demolding function are integrated into the same component, simplifying the mold structure.

[0032] Combination Figure 3 , Figure 4 As shown, the upper mold 1 for molding interior parts is provided with two oblique connecting slide rods 9. The oblique connecting slide rods 9 pass through the oblique ejector slide 7, and the oblique ejector slide 7 slides in cooperation with the oblique connecting slide rods 9.

[0033] In this embodiment, when the upper mold 1 for molding interior parts moves up and down, the inclined connecting slide rod 9 moves synchronously upwards, driving the inclined ejector slide 7 to slide horizontally through the pushing action of the inclined surface. When the upper mold rises, the inclined connecting slide rod 9 drives the inclined ejector slide 7 to slide outwards (in the ejection direction); when the upper mold falls, the inclined connecting slide rod 9 drives the inclined ejector slide 7 to slide inwards (in the reset direction). The sliding cooperation between the inclined connecting slide rod 9 and the inclined ejector slide 7 transforms the vertical movement of the upper mold into the horizontal sliding of the inclined ejector, realizing mechanical linkage ejection without the need for an additional driving device. The precise cooperation ensures the smoothness and accuracy of the movement.

[0034] The angle between the center lines of the two diagonally connected sliding rods 9 is an acute angle.

[0035] In this embodiment, the two oblique connecting slide rods 9 are symmetrically distributed in space, and their centerlines form an acute angle (usually 30°-60°). The lower ends of the two slide rods are inclined outward, and the upper ends converge inward and are fixed on the upper mold 1 for molding interior parts. Since the two oblique connecting slide rods 9 are arranged at an acute angle, when they rise with the upper mold, they will generate an outward thrust on the two oblique ejector slides 7, causing the two slides to slide outward at the same time, and the sliding distance is equal. The size of the angle determines the ratio between the demolding speed and the demolding distance.

[0036] Combination Figure 3 As shown, the auxiliary molding part 4 includes an auxiliary molding plate 10 disposed below the upper mold 1 for interior molding parts, and the auxiliary molding plate 10 is staggered with two inclined ejector slides 7.

[0037] In this embodiment, the lower end of the auxiliary molding panel 10 is inserted into the positioning groove of the lower mold of the interior part molding to achieve precise positioning; its two sides maintain a gap of 0.1mm with the inner side of the inclined ejector slide 7, and together they form the molding surface of the middle part of the product in the mold-closed state; during the demolding process, the auxiliary molding panel 10 remains stationary, and the inclined ejector slide 7 slides along its two sides. The auxiliary molding panel 10 is specially used to mold the complex middle structure of the product, which improves the molding accuracy; the staggered structure with the inclined ejector slide 7 ensures the integrity of the cavity, and at the same time provides a guiding effect for the movement of the inclined ejector.

[0038] The straight ejector 6 includes an ejector pin fixing slide plate 11 disposed on the lower mold of the interior part forming, the ejector pin fixing slide plate 11 is provided with a plurality of straight ejector pins 12, and the top of the straight ejector pins 12 is provided with a top block 13.

[0039] In this embodiment, the straight ejector rod 12 and the ejector rod fixing slide plate 11 are rigidly connected by an interference fit; the straight ejector rod 12 and the guide hole of the interior part forming lower mold are fitted with a clearance fit to ensure smooth vertical movement; the top surface of the ejector block 13 is in close contact with the bottom of the product to provide uniform ejection force during demolding.

[0040] Combination Figure 1-4 As shown, the top rod fixing slide plate 11 is also provided with a side forming surface top rod 14, and the side forming surface top rod 14 corresponds to the position of the side forming surface 8 of the interior part.

[0041] In this embodiment, several side forming surface ejector pins 14 are vertically installed on the upper surface of the ejector pin fixing slide plate 11. The positions of these ejector pins correspond one-to-one with the side forming surfaces 8 of the interior trim of the inclined ejector demolding slide 7. That is, the upper end of each side forming surface ejector pin 14 is aligned with the part where the product side contacts the side forming surface 8 of the interior trim. The length of the side forming surface ejector pin 14 is slightly shorter than that of the straight ejector pin 12, ensuring that the bottom is ejected first and then the side is ejected during the demolding process. The side forming surface ejector pin 14 is rigidly connected to the ejector pin fixing slide plate 11 and moves synchronously with it. The contact part between its upper end and the product side is rounded to avoid damaging the product surface. In the reset state, the upper end of the side forming surface ejector pin 14 is lower than the cavity surface and does not affect the product molding.

[0042] Combination Figure 1-4 As shown, the injection molded part 3 includes an injection main plate 15 and an injection manifold 16 disposed above the upper mold 1 for molding interior parts.

[0043] In this embodiment, the upper end of the injection molding main board 15 is provided with a main runner interface, which is connected to the nozzle of the injection molding machine; the injection molding manifold 16 is located below the injection molding main board 15, and has multiple manifolds inside, which evenly distribute the molten plastic conveyed by the main runner to multiple gates.

[0044] Combination Figure 1-4 As shown, the upper mold 1 and the lower mold 1 for molding interior parts are provided with cooling water pipe assembly 17.

[0045] In this embodiment, the cooling water pipe assembly 17 can quickly remove the heat during the injection molding process, shortening the molding cycle; the evenly distributed cooling water channels ensure uniform cooling of all parts of the product, reducing internal stress and deformation.

[0046] The working principle of this utility model is as follows:

[0047] During mold closing, the upper mold 1 and lower mold of the interior trim are tightly closed under the action of the mold closing mechanism. The large-angle double-sloping ejector mechanism 5 is in the inner closed position, forming a complete cavity together with the auxiliary molding part 4. The injection molding machine injects molten plastic into the cavity through the injection main plate 15 and injection manifold 16 of the injection part 3. At the same time, the cooling water pipe group 17 introduces circulating cooling water to begin cooling the mold and the plastic part. After the plastic part has completely cooled and solidified, the mold begins to open. First, the injection molding machine drives the interior trim molding process. As the upper mold 1 moves upward, the straight ejector 6 begins to move upward under the action of the external ejection mechanism. The ejector pin fixing slide plate 11 drives the straight ejector pin 12 and the side forming surface ejector pin 14 to rise synchronously. The ejector block 13 first contacts the bottom of the plastic part, lifting the plastic part 2-3mm from the bottom of the cavity of the lower mold for interior part molding, achieving initial demolding. As the upper mold 1 for interior part molding continues to rise, the inclined connecting slide 9 fixed in the upper mold rises synchronously. Due to the sliding fit between the inclined connecting slide 9 and the inclined ejector slide 7, and The acute-angle arrangement of the two inclined connecting slide rods 9 allows the two inclined ejector slides 7 to slide outwards simultaneously under the push of the inclined connecting slide rods 9. During this process, the molding surface 8 of the interior part side of the inclined ejector slide 7 gradually separates from the side of the plastic part, achieving large-angle (25°-30°) side demolding. When the inclined ejector slide 7 slides outwards to a certain position, the ejector rod 14 of the side molding surface of the straight ejector 6 begins to contact the inner surface of the side of the plastic part, applying an outward auxiliary ejection force to ensure that the side of the plastic part is completely detached. The side molding surface 8 of the interior parts prevents damage to the plastic parts due to adhesion. When the inclined ejector slide 7 slides to the maximum stroke position, the plastic parts have completely detached from all molding surfaces. At this time, the robotic arm or manual removes the plastic parts. Subsequently, the mold begins to close, and the upper mold 1 of the interior parts moves downward. Through the inclined connecting slide 9, the inclined ejector slide 7 is driven to slide inward and reset. At the same time, the straight ejector 6 moves downward and resets under the action of the reset mechanism. The entire mold returns to the initial state and is ready for the next injection molding cycle.

[0048] 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.

[0049] Although this document frequently uses terms such as interior trim molding upper mold 1, injection part 3, auxiliary molding part 4, large-angle double-sloping ejector demolding mechanism 5, straight ejector demolding part 6, sloping ejector demolding slide block 7, interior trim side molding surface 8, sloping connecting slide bar 9, auxiliary molding insert 10, ejector pin fixing slide plate 11, straight ejector pin 12, ejector block 13, side molding surface ejector pin 14, injection molding main plate 15, injection molding manifold 16, cooling water pipe assembly 17, 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 large-angle double-sloping ejector mechanism for injection molds of automotive interior parts, comprising an upper mold (1) for molding interior parts and a lower mold for molding interior parts, characterized in that, The upper mold (1) for interior parts is provided with an injection molded part (3), and the lower mold for interior parts is provided with an auxiliary molding part (4) and a large-angle double-sloping ejector mechanism (5). When the upper mold (1) and the lower mold for interior parts are fitted together, a complete cavity is formed between the upper mold (1), the lower mold, the auxiliary molding part (4), and the large-angle double-sloping ejector mechanism (5). The lower mold for interior parts is provided with a straight ejector (6), and the straight ejector (6) and the large-angle double-sloping ejector mechanism (5) are staggered.

2. The large-angle double-sloping ejector mechanism for automotive interior parts injection molds according to claim 1, characterized in that, The large-angle double-sloping-top demolding mechanism (5) includes two sloping-top demolding slides (7) located below the upper mold (1) for interior parts forming. The two sloping-top demolding slides (7) are symmetrically arranged, and the sloping-top demolding slides (7) are staggered with the auxiliary forming parts (4).

3. The large-angle double-sloping ejector mechanism for automotive interior parts injection molds according to claim 2, characterized in that, The inclined ejector slide (7) has an interior part side forming surface (8) on its inner side.

4. The large-angle double-sloping ejector mechanism for automotive interior parts injection molds according to claim 3, characterized in that, The upper mold (1) for forming interior parts is provided with two oblique connecting slide rods (9). The oblique connecting slide rods (9) pass through the oblique top demolding slide (7), and the oblique top demolding slide (7) slides in cooperation with the oblique connecting slide rods (9).

5. The large-angle double-sloping ejector mechanism for automotive interior parts injection molds according to claim 4, characterized in that, The angle between the centerlines of the two obliquely connected sliding rods (9) is an acute angle.

6. The large-angle double-sloping ejector mechanism for automotive interior parts injection molds according to claim 2, characterized in that, The auxiliary molding part (4) includes an auxiliary molding panel (10) disposed below the upper mold (1) for molding interior parts, and the auxiliary molding panel (10) is staggered with two inclined ejector slides (7).

7. The large-angle double-sloping ejector mechanism for automotive interior parts injection molds according to any one of claims 3-5, characterized in that, The straight ejector (6) includes an ejector pin fixing slide plate (11) disposed on the lower mold of the interior part forming, the ejector pin fixing slide plate (11) is provided with a plurality of straight ejector pins (12), and the top of the straight ejector pins (12) is provided with a top block (13).

8. The large-angle double-sloping ejector mechanism for automotive interior parts injection molds according to claim 7, characterized in that, The top rod fixing slide plate (11) is also provided with a side forming surface top rod (14), and the side forming surface top rod (14) corresponds to the position of the side forming surface (8) of the interior part.

9. The large-angle double-sloping ejector mechanism for automotive interior parts injection molds according to claim 1, characterized in that, The injection molded part (3) includes an injection main plate (15) and an injection manifold (16) disposed above the upper mold (1) for molding interior parts.

10. The large-angle double-sloping ejector mechanism for automotive interior parts injection molds according to claim 1, characterized in that, The upper mold (1) and lower mold for interior parts are equipped with cooling water pipe assembly (17).

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