Automobile injection mold with convenient demolding

Abstract

The utility model discloses a convenient demoulding's car injection mold relates to injection mold technical field, including bottom plate and its top fixed connection's support rod, and the support rod top fixedly connected with the top plate, and the top plate top central installation has the hydraulic cylinder, and the hydraulic cylinder output fixedly connected with the upper die holder, and the bottom plate top central installation has the lower die holder, and the lower die holder inboard is installed with the ejection mechanism, the utility model discloses through the force of multiple ejection rod and promotes injection part demoulding, and the ejection plate is driven to slide down the link when the mold closes the thrust of the upper die holder, and then compresses the second spring, and after injection is completed, the second spring releases the elastic force, and promotes the sliding link and the lift plate to move upward, makes the ejection plate and ejects the forming piece, ensures quick demoulding, and the whole process realizes efficient demoulding through the accurate structure design, avoids the situation that the forming piece sticks to the mold or the mold, improves production efficiency and forming piece quality, and the accurate control of ejection mechanism ensures the smooth and stable of demoulding process.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an automotive injection mold that is easy to demold. Background Technology

[0002] Automotive injection molding is a key process in modern automotive manufacturing, mainly referring to the production of automotive interior and exterior trim and functional components through injection molding technology. Plastic granules are heated and melted, then injected under high pressure into a precision mold. After cooling and solidification, the mold is removed, forming complex parts in a single process.

[0003] For example, CN217621880U discloses an injection mold for automotive parts that is easy to demold, including a base plate, a lower mold body, a bracket, and a U-shaped slide bar. A fixing block is fixedly connected to the lower end of the outer surface of the U-shaped slide bar, a spring is fixedly connected to the top of the fixing block, a movable slide plate is fixedly connected to the top of the spring, a connecting plate is fixedly connected to one side of the movable slide plate, a support plate is fixedly connected to the inner side of the connecting plate, a connecting rod is fixedly connected to the top of the support plate, a push plate is fixedly connected to the top of the connecting rod, a cooling hole is opened on the inner surface of the upper end of the lower mold body, and a cooler is fixedly installed at the lower end of the rear side of the lower mold body.

[0004] However, in existing technologies, traditional demolding methods often rely on simple ejection structures, which makes demolding uneven and easily leads to injection molded parts sticking to or jamming the mold, affecting the continuity and efficiency of production. In addition, since the ejection force cannot be precisely controlled, the molded parts may be subjected to excessive or uneven thrust during the demolding process, resulting in deformation or damage to the molded parts, thereby reducing the quality of the products. Utility Model Content

[0005] The purpose of this invention is to solve the problem that traditional demolding methods in the prior art often rely on simple ejection structures, which makes demolding uneven and easily leads to problems such as molded parts sticking to the mold or jamming. Therefore, this invention proposes an automotive injection mold that facilitates demolding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automotive injection mold that is easy to demold, comprising a base plate and a support rod fixedly connected to its top, a top plate fixedly connected to the top of the support rod, a hydraulic cylinder installed at the center of the top of the top plate, an upper mold base fixedly connected to the output end of the hydraulic cylinder, a lower mold base installed at the center of the top of the base plate, and an ejection mechanism installed inside the lower mold base.

[0007] The ejection mechanism includes a mounting plate, with multiple cylinders fixedly connected to the top of the mounting plate. Ejection rods are installed inside the cylinders. A sleeve is fixedly connected to the center of the top of the mounting plate. A lifting plate is slidably connected to the inner cavity of the sleeve. A second spring abuts against the bottom of the lifting plate. The bottom end of the second spring abuts against the bottom of the inner cavity of the sleeve. A sliding rod is fixedly connected to the center of the top of the lifting plate. An ejection plate is fixedly connected to the top of the sliding rod. Multiple limit rods are fixedly connected to the bottom of the ejection plate.

[0008] Preferably, a mold body is installed on the top of the lower mold base, and a mold cavity is opened on the surface of the mold body.

[0009] Preferably, the corner of the mold body is fitted with a guide groove, and the bottom of the upper mold base is fixedly connected with a positioning rod that is fitted with the guide groove.

[0010] Preferably, a first spring is provided at the bottom of the upper mold base, and the first spring is sleeved on the outer surface of the support rod.

[0011] Preferably, a guide rod is fixedly connected to the top of the upper mold base, and the top end of the guide rod penetrates through the top plate.

[0012] Preferably, the mold body has multiple movable holes on its inner side, and the ejector rod is slidably installed in the movable holes.

[0013] Preferably, the ejector plate is located inside the mold cavity, and the limiting rod is slidably connected to the lower mold base.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. In this utility model, the force of multiple ejector rods pushes the injection molded part to demold. When the mold is closed, the ejector plate is pushed by the upper mold base, which drives the sliding rod to move downward, thereby compressing the second spring. After the injection is completed, the second spring releases its elastic force, pushing the lifting plate and the sliding rod to move upward, so that the ejector plate ejects the molded part, ensuring rapid demolding. The whole process achieves efficient demolding through precise structural design, avoiding the situation of molded parts sticking to the mold or jamming the mold, improving production efficiency and the quality of molded parts. The precise control of the ejection mechanism ensures the smoothness and stability of the demolding process.

[0016] 2. In this utility model, under the drive of the hydraulic cylinder, the upper mold base slides downward along the surface of the support rod. The first spring is compressed under the action of the extrusion force to ensure the precise alignment of the mold during the mold closing process. The positioning rod is inserted into the guide groove to realize accurate mold closing, improve the quality and precision of the injection molded product. After the injection is completed, the elastic force of the first spring helps the upper mold base to reset, ensuring the efficient operation of the equipment and the coordinated work of the hydraulic cylinder, the first spring, the positioning rod and the guide groove. Attached Figure Description

[0017] Figure 1 This utility model presents a schematic diagram of the overall three-dimensional structure of an automotive injection mold that facilitates demolding.

[0018] Figure 2 A front view structural diagram of an automotive injection mold that facilitates demolding is provided for this utility model;

[0019] Figure 3 This utility model presents a three-dimensional structural diagram of a car injection mold that facilitates demolding.

[0020] Figure 4 This utility model presents a partial three-dimensional structural diagram of the ejection mechanism in an automotive injection mold that facilitates demolding.

[0021] Legend: 1. Base plate; 2. Support rod; 3. Upper mold base; 31. Guide rod; 32. First spring; 33. Positioning rod; 4. Top plate; 5. Hydraulic cylinder; 6. Lower mold base; 61. Mold body; 62. Mold cavity; 63. Guide groove; 64. Movable hole; 7. Ejection mechanism; 71. Mounting plate; 72. Cylinder; 73. Ejection rod; 74. Ejection plate; 75. Limiting rod; 76. Sleeve; 77. Lifting plate; 78. Second spring; 79. Sliding rod. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] Example 1: As Figures 1-4 As shown, this utility model provides an automotive injection mold that is easy to demold, including a base plate 1 and a support rod 2 fixedly connected to its top. A top plate 4 is fixedly connected to the top of the support rod 2. A hydraulic cylinder 5 is installed at the center of the top of the top plate 4. An upper mold base 3 is fixedly connected to the output end of the hydraulic cylinder 5. A lower mold base 6 is installed at the center of the top of the base plate 1. An ejection mechanism 7 is installed inside the lower mold base 6.

[0025] The ejection mechanism 7 includes a mounting plate 71. Multiple cylinders 72 are fixedly connected to the top of the mounting plate 71. An ejection rod 73 is installed inside the cylinder 72. A sleeve 76 is fixedly connected to the center of the top of the mounting plate 71. A lifting plate 77 is slidably connected to the inner cavity of the sleeve 76. A second spring 78 abuts against the bottom of the lifting plate 77. The bottom end of the second spring 78 abuts against the bottom of the inner cavity of the sleeve 76. A sliding rod 79 is fixedly connected to the center of the top of the lifting plate 77. An ejection plate 74 is fixedly connected to the top of the sliding rod 79. Multiple limit rods 75 are fixedly connected to the bottom of the ejection plate 74.

[0026] The specific settings and functions of this embodiment will be described in detail below. During the injection molding process, the upper mold base 3 and the mold body 61 are precisely connected through a mold closing operation, ensuring that the injection mold cavity 62 forms a closed injection space. Next, molten plastic is injected into the mold cavity 62 through the injection system of the injection molding machine to complete the injection molding process. After the injection molding process is completed, in order to facilitate demolding, the ejection mechanism 7 is activated to eject the molded injection part from the mold.

[0027] The drive mechanism 7 is controlled by a cylinder 72, which generates an upward force by pushing the ejector rods 73. The parallel arrangement of multiple ejector rods 73 provides a uniform pushing force, enabling the molded part at the edge of the injection molding machine to be effectively ejected. The movement of the ejector rods 73 provides the necessary pushing force for the molded part to detach from the mold, ensuring the entire demolding process is efficient and damage-free.

[0028] During the mold closing stage, the ejector plate 74 is subjected to a downward pushing force applied by the upper mold base 3. This pushing force causes the ejector plate 74 to move downward, and at the same time, it drives the sliding rod 79 to move downward through the connecting piece. During this process, the downward movement of the sliding rod 79 causes the lifting plate 77 to move downward as well, and applies a compressive force to the second spring 78, causing the second spring 78 to be compressed. At this time, the second spring 78 will store a certain amount of compressive energy.

[0029] After injection molding is completed, when the ejection mechanism 7 is activated, the cylinder 72 pushes the ejector rod 73 to generate an upward thrust. The second spring 78 then releases its stored elastic potential energy, returning to its original shape, which in turn pushes the lifting plate 77 and the sliding rod 79 upward. This movement, through the ejection plate 74, effectively ejects the injection-molded part, completing the demolding action quickly and accurately. This precise design and operation ensures smooth demolding of the injection-molded part, thereby improving production efficiency and reducing molding defects.

[0030] Example 2: Figure 1 and Figure 2As shown, a mold body 61 is mounted on the top of the lower mold base 6, and a mold cavity 62 is formed on the surface of the mold body 61. A guide groove 63 is inserted into the corner of the mold body 61, and a positioning rod 33 that is inserted into the guide groove 63 is fixedly connected to the bottom of the upper mold base 3. A first spring 32 is provided at the bottom of the upper mold base 3, and the first spring 32 is sleeved on the outer surface of the support rod 2. A guide rod 31 is fixedly connected to the top of the upper mold base 3, and the top end of the guide rod 31 passes through the top plate 4. Multiple movable holes 64 are formed on the inner side of the mold body 61, and an ejector rod 73 is slidably installed in the movable holes 64. The ejector plate 74 is located inside the mold cavity 62, and a limiting rod 75 is slidably connected to the lower mold base 6.

[0031] The overall effect of this embodiment is that, driven by the hydraulic cylinder 5, the upper mold base 3 slides vertically downwards along the surface of the support rod 2. As the sliding process progresses, the first spring 32 is compressed under external pressure, thus exhibiting its elastic properties. Specifically, the hydraulic cylinder 5 precisely adjusts the downward speed of the upper mold base 3 by controlling the pressure and flow rate, ensuring that the position and state of the mold are precisely consistent when the mold is closed.

[0032] Furthermore, during the mold closing process of the upper mold base 3, the bottom positioning rod 33 accurately inserts and forms a mechanical connection with the guide groove 63, ensuring precise mold alignment. This insertion action not only makes mold closing more precise, but also effectively improves the mold closing quality during the injection molding process by eliminating possible deviations between molds.

[0033] After the injection molding process is completed, the first spring 32, through its stored elastic energy, assists the upper mold base 3 in automatically resetting. This resetting mechanism is achieved through the spring's reverse elastic force, ensuring that the upper mold base 3 quickly returns to its initial position after the injection molding cycle ends, preparing for the next operation.

[0034] The operating method and working principle of this device are as follows: During injection molding, after the upper mold base 3 and the mold body 61 are closed, the mold is injected into the mold cavity 62. After injection molding is completed, the workpiece is ejected by the ejection mechanism 7. During this process, the cylinder 72 drives the ejector rod 73 to move upward, and the ejection force of multiple ejector rods 73 pushes the edge of the injection molded part to achieve demolding.

[0035] During mold closing, the upper mold base 3 presses down on the ejector plate 74, causing the sliding rod 79 to move downwards, which in turn causes the lifting plate 77 to press down and compress the second spring 78. After injection molding is completed, the second spring 78 releases its elastic force, pushing the lifting plate 77 and the sliding rod 79 upwards, thereby causing the ejector plate 74 to eject the injection molded part, achieving rapid demolding.

[0036] Driven by the hydraulic cylinder 5, the upper mold base 3 slides downward along the support rod 2, simultaneously compressing the first spring 32. During mold closing, the positioning rod 33 at the bottom of the upper mold base 3 inserts into the guide groove 63, ensuring accurate mold closing position and helping to improve injection molding quality. After injection molding is completed, the elastic force of the first spring 32 assists the upper mold base 3 in resetting.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A convenient demolding automotive injection mold, comprising a base plate (1) and a support rod (2) fixedly connected to its top, wherein a top plate (4) is fixedly connected to the top of the support rod (2), a hydraulic cylinder (5) is installed at the center of the top of the top plate (4), and an upper mold base (3) is fixedly connected to the output end of the hydraulic cylinder (5), characterized in that: A lower mold base (6) is installed at the top center of the base plate (1), and an ejection mechanism (7) is installed on the inner side of the lower mold base (6). The ejection mechanism (7) includes a mounting plate (71), a plurality of cylinders (72) are fixedly connected to the top of the mounting plate (71), an ejection rod (73) is installed inside the cylinder (72), a sleeve (76) is fixedly connected to the center of the top of the mounting plate (71), a lifting plate (77) is slidably connected to the inner cavity of the sleeve (76), a second spring (78) is abutted at the bottom of the lifting plate (77), the bottom end of the second spring (78) abuts at the bottom of the inner cavity of the sleeve (76), a sliding rod (79) is fixedly connected to the center of the top of the lifting plate (77), an ejection plate (74) is fixedly connected to the top of the sliding rod (79), and a plurality of limiting rods (75) are fixedly connected to the bottom of the ejection plate (74).

2. The automotive injection mold for easy demolding according to claim 1, characterized in that: The mold body (61) is mounted on the top of the lower mold base (6), and the mold body (61) has a mold cavity (62) on its surface.

3. The automotive injection mold for easy demolding according to claim 2, characterized in that: The corner of the mold body (61) is fitted with a guide groove (63), and the bottom of the upper mold base (3) is fixedly connected with a positioning rod (33) that is fitted with the guide groove (63).

4. The automotive injection mold for easy demolding according to claim 1, characterized in that: The bottom of the upper mold base (3) is provided with a first spring (32), which is sleeved on the outer surface of the support rod (2).

5. The automotive injection mold for easy demolding according to claim 1, characterized in that: The top of the upper mold base (3) is fixedly connected to a guide rod (31), and the top end of the guide rod (31) passes through the top plate (4).

6. The automotive injection mold for easy demolding according to claim 2, characterized in that: The mold body (61) has multiple movable holes (64) on its inner side, and the ejector rod (73) is slidably installed in the movable holes (64).

7. The automotive injection mold for easy demolding according to claim 1, characterized in that: The ejector plate (74) is located inside the mold cavity (62), and the limiting rod (75) is slidably connected to the lower mold base (6).

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