Ejection mechanism for injection molding machine

Abstract

The utility model provides an ejection mechanism for an injection molding machine, and relates to the technical field of injection molding machines. The five guide rods are respectively inserted into the middle part of the mold bearing plate and are used for ejecting a product; and the reset spring B is fixedly installed on the arc surface of the guide rod and used for resetting the guide rod, a clamping piece is arranged at the bottom end of the guide rod, the upper end of the clamping piece is clamped with the guide rod, a push plate is arranged at the lower end of the clamping piece, and a spring A is arranged in the position between the clamping piece and the guide rod. Through the cooperation of the guide rod, the clamping piece, the push plate and the spring A, when a hydraulic machine pushes the guide rod to move, the guide rod pushes the push plate to demould through the spring A according to the hardening degree of a product, so that the pushing force is applied according to the actual hardening degree of the product; and the problems of easy deformation, fracture and the like in the ejection process are avoided.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and specifically to an ejection mechanism for an injection molding machine. Background Technology

[0002] The design of the ejection mechanism in an injection molding machine is primarily based on the product's shape, structure, and plastic properties. Its design goal is to ensure the product can be smoothly ejected from the mold while avoiding damage during the ejection process. Design principles include selecting a suitable parting surface, ensuring a balance between ejection force and position, avoiding placing ejector pins in locations that affect the product's appearance and function, using standard parts as much as possible to improve manufacturing and replacement convenience, and placing the ejection position at a point of high resistance.

[0003] Chinese patent CN 214982936 U discloses an ejection mechanism for an injection molding machine. The key technical points are: it includes a mold support plate with guide holes at each of its four corners; an ejector head is inserted into the center of the mold support plate; a return spring is provided on the arc surface of the ejector head; a connecting plate is provided at the top of the ejector head; the connecting plate and the ejector head are connected together by a nut; and a pressure rod is threaded into the center of the connecting plate. This invention solves the problems of existing injection molding machine ejection mechanisms failing to stably apply pressure to the ejection structure on the injection mold, and the inconvenience of assembly and maintenance of the injection molding machine structure. By improving and optimizing the structure of the injection molding machine ejection mechanism, it enables the ejection mechanism to conveniently and stably apply pressure to the ejection structure of the injection mold, thereby facilitating the ejection of the workpiece formed inside the injection mold.

[0004] When using existing testing instruments, a hydraulic cylinder drives a pressure rod to press against the ejector head to achieve demolding. However, this demolding method does not apply the pushing force according to the actual hardening degree of the product, which can easily lead to deformation, cracking and other problems during the ejection process. When the ejector head is designed as a flat surface and cannot contact the product, it may not provide heat dissipation holes, which may cause it to stick to the product and fail to be ejected. Utility Model Content

[0005] This invention provides an ejection mechanism for an injection molding machine, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] An embodiment of this utility model provides an ejection mechanism for an injection molding machine, comprising:

[0008] Mold support plate;

[0009] Five guide rods are provided, each inserted into the middle of the mold support plate, for ejecting the product;

[0010] The return spring B is fixedly installed on the arc surface of the guide rod and is used to reset the guide rod.

[0011] The clip has an upper end that engages with the guide rod and a lower end that has a push plate.

[0012] Spring A is fixedly installed between the clip and the guide rod;

[0013] The connecting plate is fixedly installed at the top of the guide rod;

[0014] The pressure rod is fixedly connected to the connecting plate and the flange at both ends, respectively.

[0015] With the above technical solution, the two ends of the connecting plate are fixedly connected to the guide rod and the pressure rod, respectively, so that the pressure rod pushes the connecting plate to push multiple guide rods to move and demold the product. The guide rods are reset by the return spring B after demolding, so as to achieve the purpose of cyclic operation.

[0016] Furthermore, the mold support plate includes positioning holes, four of which are symmetrically arranged at the four corners of the mold support plate. The mold support plate is provided with several mounting holes A. Five fixing holes are evenly provided in the middle of the mold support plate. A groove is provided at the bottom of the mold support plate between the five fixing holes.

[0017] The above technical solution allows the groove to be positioned so that the bottom surface of the push plate and the bottom surface of the mold support plate are on the same plane, thus facilitating the use of the push plate.

[0018] Furthermore, the bottom of the mold support plate is provided with several heat dissipation grooves for heat dissipation of the product.

[0019] Through the above technical solution, the heat dissipation groove can dissipate heat from the processed materials, preventing the product from sticking to the mold support plate and causing the product to be unable to be ejected.

[0020] Furthermore, the diameter of the fixing hole matches the diameter of the guide rod.

[0021] The above technical solution allows the guide rod to be freely inserted through the fixing hole, making it convenient to install the guide rod.

[0022] Furthermore, the bottom of the push plate is provided with heat dissipation grooves for heat dissipation of the product.

[0023] Through the above technical solution, the heat dissipation groove can dissipate heat from the processed materials, preventing the product from sticking to the push plate and causing the product to be unable to be pushed out.

[0024] Furthermore, the upper end of the pressure rod is fixedly connected to a flange, and the flange has a mounting hole B near its edge.

[0025] The above technical solution, through the setting of flange and mounting hole B, facilitates connection with the output end of the injection molding machine hydraulic cylinder, so that the push rod can be pushed out.

[0026] The above-described solution of this utility model has at least the following beneficial effects:

[0027] This invention utilizes the cooperation between the guide rod, the clamp, the push plate, and the spring A. When the hydraulic press pushes the guide rod to move, the guide rod, through the spring A, adjusts the force according to the hardening degree of the product, thereby pushing the push plate to demold. This achieves the goal of applying the pushing force according to the actual hardening degree of the product, avoiding problems such as deformation and breakage that are prone to occur during the ejection process.

[0028] This utility model provides heat dissipation by setting heat dissipation grooves at the bottom of the push plate and the mold support plate to dissipate heat when the mold support plate comes into contact with the product. This allows the product to be cooled through the heat dissipation grooves, avoiding problems such as sticking to the ejection mechanism and being damaged, and further improving the practicality of the ejection mechanism. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the guide rod structure of this utility model;

[0031] Figure 3 This is a schematic diagram of the mold support plate structure of this utility model;

[0032] Figure 4 This is a schematic diagram of the push plate structure of this utility model.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Mold support plate; 11. Mounting hole A; 12. Fixing hole; 13. Groove; 2. Guide rod; 21. Clip; 22. Push plate; 23. Heat dissipation groove; 24. Spring A; 3. Return spring B; 4. Connecting plate; 5. Pressure rod; 6. Flange; 7. Mounting hole B; 10. Positioning hole. Detailed Implementation

[0035] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0036] like Figures 1 to 4 As shown, an embodiment of this utility model provides an ejection mechanism for an injection molding machine, comprising: a mold support plate 1; five guide rods 2, each inserted into the middle of the mold support plate 1 for ejecting the product; a return spring B3, fixedly installed on the arc surface of the guide rods 2 for resetting the guide rods 2; a clamping piece 21, the upper end of which engages with the guide rods 2, and the lower end of which is provided with a push plate 22; a spring A24, fixedly installed between the clamping piece 21 and the guide rods 2; a connecting plate 4, fixedly installed at the top of the guide rods 2; and a pressure rod 5, both ends of which are fixedly connected to the connecting plate 4 and a flange 6, respectively.

[0037] In this embodiment, the spring A24, the clip 21 and the guide rod 2 are connected by a fixed connection. When the driving device pushes the guide rod 2 forward to push the product out, the spring A24 can apply a pushing force according to the actual hardening degree of the product, so as to avoid deformation during the pushing process.

[0038] like Figures 1 to 3 As shown, the mold support plate 1 includes four positioning holes 10, which are symmetrically located at the four corners of the mold support plate 1. The mold support plate 1 also has several mounting holes A11, and five fixing holes 12 are evenly distributed in the center of the mold support plate 1. A groove 13 is provided at the bottom of the mold support plate 1 between the five fixing holes 12.

[0039] In this embodiment, the mold is mounted on the support plate 1 through the positioning hole 10. When the driving device pushes the positioning mechanism out, the mold can be prevented from shaking.

[0040] like Figures 1 to 4 As shown, the bottom of the mold support plate 1 is provided with several heat dissipation grooves 23 for heat dissipation of the product.

[0041] In this embodiment, when the product is being shaped, it can be cooled by the heat dissipation groove 23 to prevent it from sticking to the device.

[0042] In this embodiment of the invention, the working principle is as follows: During use, the entire ejection mechanism of the injection molding machine is installed on the injection molding machine according to the usage requirements. Then, the injection mold is installed on the corresponding mold support plate 1. After that, the injection molding machine can be operated. After injection molding, the mold is opened. The hydraulic cylinder pushes the pressure rod 5, which drives multiple sets of guide rods 2 forward through the connecting plate 4. Through the spring A24 between the guide rod 2 and the clamping part 21, the force is scaled according to the hardening degree of the product, pushing the push plate 22 to demold. This achieves the goal of applying the pushing force according to the actual hardening degree of the product, avoiding problems such as deformation and cracking during the ejection process.

[0043] like Figures 1 to 4 As shown, the bottom of the push plate 22 is provided with a heat dissipation groove 23 for heat dissipation of the product.

[0044] In this embodiment, when the product is being shaped, it can be cooled by the heat dissipation groove 23 to prevent it from sticking to the push plate 22.

[0045] like Figures 1 to 2 As shown, the upper end of the pressure rod 5 is fixedly connected to the flange 6, and the flange 6 has a mounting hole B7 near its edge.

[0046] In this embodiment, mounting hole B7 facilitates the user to connect this device to an external device.

[0047] In this embodiment of the utility model, when the driving device pushes the ejection mechanism to eject the product on the mold support plate 1, the heat dissipation groove 23 at the bottom of the mold support plate 1 and the push plate 22 can simultaneously provide heat dissipation for the product to avoid sticking and causing problems such as the product being unable to be ejected and being damaged.

[0048] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An ejection mechanism for an injection molding machine, characterized in that, include: Mold support plate (1); Five guide rods (2) are provided and are respectively inserted into the middle of the mold support plate (1) for ejecting the product; The reset spring B (3) is fixedly installed on the arc surface of the guide rod (2) and is used to reset the guide rod (2); The upper end of the clip (21) engages with the guide rod (2), and the lower end is provided with a push plate (22). Spring A (24) is fixedly installed between the clip (21) and the guide rod (2); A connecting plate (4) is fixedly installed on the top of the guide rod (2); The pressure rod (5) is fixedly connected at both ends to the connecting plate (4) and the flange (6).

2. The ejection mechanism for an injection molding machine according to claim 1, characterized in that, The mold support plate (1) includes positioning holes (10), which are four in number and symmetrically located at the four corners of the mold support plate (1). The mold support plate (1) has several mounting holes A (11), and five fixing holes (12) are evenly provided in the middle of the mold support plate (1). The bottom of the mold support plate (1) is provided with a groove (13) between the five fixing holes (12).

3. The ejection mechanism for an injection molding machine according to claim 1, characterized in that, The bottom of the mold support plate (1) is provided with several heat dissipation grooves (23) for heat dissipation of the product.

4. The ejection mechanism for an injection molding machine according to claim 2, characterized in that, The diameter of the fixing hole (12) matches the diameter of the guide rod (2).

5. The ejection mechanism for an injection molding machine according to claim 4, characterized in that, The bottom of the push plate (22) is provided with a heat dissipation groove (23) for heat dissipation of the product.

6. The ejection mechanism for an injection molding machine according to claim 1, characterized in that, The upper end of the pressure rod (5) is fixedly connected to the flange (6), and the flange (6) has a mounting hole B (7) near its edge.

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