Plastic part forming mold convenient to demold

Abstract

The utility model relates to the field of injection mold devices, and discloses a plastic part forming mold convenient to demold, which comprises a fixed mold plate and a movable mold plate, a fixed mold and a movable mold are respectively and fixedly connected to opposite sides of the fixed mold plate and the movable mold plate, a cavity is arranged in the fixed mold, and the movable mold is arranged in the cavity. Guide columns are arranged at four corners between the movable mold plate and the fixed mold, an ejector rod plate is fixedly connected to one side, far away from the movable mold, of the movable mold plate, a pneumatic auxiliary mechanism and a mechanical ejection mechanism are arranged in the movable mold plate, a main runner is arranged in the fixed mold plate, and the mechanical ejection mechanism comprises a fixed block. According to the utility model, the rotary table is driven by the servo motor, rotary motion is converted into accurate linear reciprocating motion of the ejector rod, flexible actions such as multi-section ejection and slow ejection are realized, different demolding requirements are met, pneumatic loosening and mechanical ejection are linked, demolding force is effectively dispersed, and completeness of a product and a mold is protected.

Description

Technical Field

[0001] The utility model relates to the field of injection mold devices, in particular to a plastic part forming mold which is easy to demould. Background Art

[0002] The field of injection molds is one of the core technologies for manufacturing plastic products. It involves injecting molten plastic into the mold cavity through molds and injection molding machines, and then cooling and molding to form various plastic products. A plastic part molding mold that is easy to demold is suitable for efficient molding and demolding of plastic parts. The mold combines pneumatic assistance with mechanical ejection. First, compressed air is used to loosen the product in the mold cavity, and then the mechanical ejector rod is used to completely eject the product, thereby dispersing the demolding force, reducing the impact on the product and the mold, and improving demolding efficiency and product quality. This mold is particularly suitable for products with high appearance quality requirements (such as optical components, electronic housings) and deep cavities and thin-walled parts with complex geometries. Its design not only reduces the risk of mold jamming during production, but also extends the service life of the mold, while improving production efficiency and the qualified rate of finished products. It is an important innovation in injection molding technology.

[0003] A mold for plastic parts that facilitates demolding consists of a fixed mold, a movable mold, and a mechanical ejector mechanism. Strategically placed mechanical ejectors in the movable mold, coupled with an ejector plate, evenly distribute the ejection force, preventing deformation or damage to the product. During the ejection process, the mold precisely controls the ejector travel and force, ensuring smooth demolding while minimizing wear on the mold surface and extending mold life. This system is suitable for the production of high-quality plastic parts with complex structures, offering high demolding efficiency and a simple, reliable structure.

[0004] However, in the existing ejection mechanism of injection molds, the ejection action of the hydraulic system is relatively rough, and there is a lack of precise control over the ejection speed, force and stroke, which makes complex structural products easily damaged or deformed, and it is difficult to achieve programmable adjustment, and it is impossible to flexibly adapt to the demolding requirements of different products, such as complex actions such as multi-stage ejection or slow ejection. In addition, hydraulic or pneumatic systems usually take up a large space, resulting in a bulky overall structure of the mold, which limits the possibility of lightweighting and miniaturization. In automated production scenarios, the linkage between traditional ejection mechanisms and equipment such as robots is poor, making it difficult to maximize production efficiency. The hydraulic drive has a slow response and is difficult to match the high-paced injection molding production needs of modern times.

[0005] In view of the above problems, a plastic part molding mold that is easy to demould is proposed to solve the above problems. Utility Model Content

[0006] In order to make up for the above shortcomings, the utility model provides a plastic part molding mold that is easy to demould, aiming to solve the problems of traditional molds in precision control, movement flexibility, compact structure and automation adaptability.

[0007] In order to achieve the above-mentioned object, the utility model adopts the following technical solution: a plastic part molding mold that is easy to demold, comprising a fixed template and a movable template, wherein a fixed mold and a movable mold are fixedly connected to opposite sides of the fixed template and the movable template respectively, a mold cavity is provided inside the fixed mold, guide columns are provided at the four corners between the movable template and the fixed mold, a push rod plate is fixedly connected to the side of the movable template away from the movable mold, a pneumatic auxiliary mechanism and a mechanical ejection mechanism are provided inside the movable template, and a main flow channel is provided inside the fixed template;

[0008] The mechanical ejection mechanism includes a fixed block, a servo motor is installed inside the fixed block, an active drive component is provided at the output end of the servo motor, and a driven drive component is provided outside the active drive component.

[0009] As a further description of the above technical solution:

[0010] The active drive assembly includes a turntable, the output end of the servo motor is fixedly connected to the inside of the turntable, and a rotating rod is fixedly connected to the turntable away from the center.

[0011] As a further description of the above technical solution:

[0012] The driven drive assembly includes a rotating rod, a slider is provided on the outer side of the rotating rod, and three push rods are fixedly connected to the outer side of the slider.

[0013] As a further description of the above technical solution:

[0014] A sliding groove is provided inside the movable template, and the sliding block is slidably connected inside the sliding groove.

[0015] As a further description of the above technical solution:

[0016] Three top grooves are provided inside the fixed mold, and the three ejector rods slide inside the three top grooves respectively.

[0017] As a further description of the above technical solution:

[0018] The outer side of the rotating rod is slidably connected to the inner side of the sliding block.

[0019] As a further description of the above technical solution:

[0020] The pneumatic assist mechanism includes an air pump, and the output end of the air pump is fixedly connected to a connecting pipe.

[0021] As a further description of the above technical solution:

[0022] A plurality of air passages are provided inside the fixed mold, and the communicating pipes are connected to the air passages.

[0023] The utility model has the following beneficial effects:

[0024] 1. In the present invention, a servo motor drives the rotary turntable, which, in conjunction with a connecting rod mechanism, converts rotary motion into linear reciprocating motion, thereby achieving precise control of the ejector action. Since the product often remains on the movable mold when the movable and fixed molds are separated, the ejector can eject the product from the movable mold. At the same time, the motor drive system has the characteristic of programmable motion, which can flexibly adjust the complexity of the ejection action, such as multi-stage ejection or slow ejection, to meet the demolding requirements of different products. The turntable mechanism has a compact structure, saves mold space, and is easy to connect with automated production lines such as robots and other equipment to improve production efficiency.

[0025] 2. In the present invention, an air pump is used to inject compressed air into the air passage inside the movable mold, forming a pneumatic and mechanical linkage demoulding. The pneumatic loosening and the mechanical ejector work together to effectively disperse the demoulding force, protect the integrity of the product and the mold, and adapt to the diverse needs of complex products. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a three-dimensional schematic diagram of a plastic part molding mold that is easy to demould, proposed by the present invention;

[0027] Figure 2 This is a structural schematic diagram of a main channel of a plastic part molding mold that is easy to demould, proposed by the present invention;

[0028] Figure 3 This is a schematic structural diagram of an air duct of a plastic part molding mold that facilitates demoulding, as proposed by the present invention;

[0029] Figure 4 This is a structural schematic diagram of a slider of a plastic part forming mold that is easy to demould, proposed by the present invention;

[0030] Figure 5 The utility model provides a structural schematic diagram of a servo motor for a plastic part forming mold that is easy to demould.

[0031] Legend:

[0032] 1. Fixed template; 2. Movable template; 3. Fixed mold; 4. Movable mold; 5. Guide pillar; 6. Cavity; 7. Ejector plate; 8. Pneumatic auxiliary mechanism; 801. Air pump; 802. Connecting pipe; 803. Airway; 9. Mechanical ejector mechanism; 901. Turntable; 902. Ejector pin; 903. Slider; 904. Turning rod; 905. Slide; 906. Fixed block; 907. Servo motor; 10. Main channel; 11. Ejector groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Reference Figure 1 - Figure 5 , the utility model provides an embodiment: a plastic part molding mold that is easy to demold, including a fixed template 1 and a movable template 2, the fixed template 1 and the movable template 2 are fixedly connected on the opposite side with a fixed mold 3 and a movable mold 4, the fixed mold 3 is provided with a cavity 6, the four corners between the movable template 2 and the fixed mold 3 are provided with guide columns 5, the movable template 2 is fixedly connected to a push rod plate 7 on the side away from the movable mold 4, the movable template 2 is provided with a mechanical ejection mechanism 9 inside, the fixed template 1 is provided with a main channel 10, the mechanical ejection mechanism 9 includes a fixed block 906, a servo motor 907 is installed inside the fixed block 906, the output end of the servo motor 907 is provided with an active drive component, the main The active drive assembly includes a turntable 901, the output end of the servo motor 907 is fixedly connected to the inside of the turntable 901, and the turntable 901 is fixedly connected to a rotating rod 904 away from the center. A driven drive assembly is provided on the outside of the active drive assembly, and the driven drive assembly includes a turning rod 904, a slider 903 is provided on the outside of the turning rod 904, and the outside of the turning rod 904 is slidably connected to the inside of the slider 903. Three ejector rods 902 are fixedly connected to the outside of the slider 903, a slide groove 905 is provided inside the movable template 2, and the slider 903 is slidably connected to the inside of the slide groove 905. Three top grooves 11 are provided inside the fixed mold 3, and the three ejector rods 902 slide in the three top grooves 11 respectively.

[0035] Specifically, in this embodiment, the fixed template 1 and the movable template 2 are connected by guide pillars 5 to achieve precise positioning of the mold. A fixed mold 3 is set inside the fixed template 1, and a cavity 6 is formed inside the fixed mold 3. The movable mold 4 is fixedly connected to the movable template 2. The two cooperate to form the molding space of the plastic part. A mechanical ejection mechanism 9 is installed inside the movable template 2. Its core component is an active and passive linkage system driven by a servo motor 907. The servo motor 907 drives the eccentric rotating rod 904 through the turntable 901, driving the slider 903 to slide back and forth in the slide groove 905 inside the movable template 2. Multiple ejector pins 902 are fixedly connected to the outside of the slider 903. The ejector pins 902 pass through the movable mold 4 and slide in the top groove 11 inside the fixed mold 3 to realize the demolding action of the product. The action of the ejector pins 902 is controlled by the servo motor 907, and the ejection force, speed and stroke can be precisely adjusted. The guide pillars 5 ensure the precise movement of the movable template 2 and cooperate with the main channel 10 to ensure the stability of the plastic melt flowing into the cavity 6. The overall structure is compact and highly adaptable, effectively improving the production efficiency and product quality of the mold while extending the service life of the mold.

[0036] Reference Figure 1 and Figure 3 A pneumatic auxiliary mechanism 8 is provided inside the movable template 2, and the pneumatic auxiliary mechanism 8 includes an air pump 801. The output end of the air pump 801 is fixedly connected to a connecting pipe 802. A plurality of air channels 803 are opened inside the fixed mold 3, and the connecting pipe 802 is connected to the air channel 803.

[0037] Specifically, an air pump 801 is provided inside the movable template 2. The air pump 801 is started before the servo motor 907, and the compressed air is injected into the complex air channel 803 in the movable mold 4 through the connecting pipe 802, so as to assist in ejecting the position that the ejector rod 902 is difficult to reach, and provide a more uniform ejection force by cooperating with the mechanical ejection mechanism 9.

[0038] Working principle: The fixed template 1 and the movable template 2 are connected by a guide column 5 to ensure precise positioning. The movable mold 4 and the fixed mold 3 together form the molding space for the plastic part. When the mold is demolded, the air pump 801 of the pneumatic auxiliary mechanism 8 is started, and the compressed air is injected into the air channel 803 in the movable mold 4 through the connecting pipe 802, providing uniform auxiliary ejection force to the position that is difficult for the ejector 902 to cover. Subsequently, the mechanical ejection mechanism 9 is driven by the servo motor 907, and the turntable 901 drives the slider 903 to slide back and forth in the slide groove 905 through the eccentric rotating rod 904. The ejector rod 902 connected to the outside of the slider 903 passes through the movable mold 4 and moves along the top groove 11 in the fixed mold 3 to completely eject the product. The servo motor 907 accurately controls the force, speed and stroke of the ejector rod 902, and cooperates with the pneumatic auxiliary mechanism 8 to disperse the demolding force, avoid deformation or damage of the product, ensure the quality of the product, and extend the service life of the mold.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plastic part forming mold that is easy to demould, comprising a fixed template (1) and a movable template (2), characterized in that: A fixed mold (3) and a movable mold (4) are fixedly connected to opposite sides of the fixed mold (1) and the movable mold (2), respectively; a cavity (6) is provided inside the fixed mold (3); guide pillars (5) are provided at four corners between the movable mold (2) and the fixed mold (3); a push rod plate (7) is fixedly connected to the side of the movable mold (2) away from the movable mold (4); a pneumatic auxiliary mechanism (8) and a mechanical ejection mechanism (9) are provided inside the movable mold (2); and a main flow channel (10) is provided inside the fixed mold (1); The mechanical ejection mechanism (9) comprises a fixed block (906), a servo motor (907) is installed inside the fixed block (906), an active drive component is provided at the output end of the servo motor (907), and a passive drive component is provided outside the active drive component.

2. The plastic part forming mold for easy demoulding according to claim 1, characterized in that: The active drive assembly comprises a turntable (901), an output end of the servo motor (907) is fixedly connected to the inside of the turntable (901), and a rotating rod (904) is fixedly connected to the turntable (901) away from the center.

3. The plastic part forming mold for easy demoulding according to claim 1, characterized in that: The driven drive assembly comprises a rotating rod (904), a slider (903) is provided on the outer side of the rotating rod (904), and three push rods (902) are fixedly connected to the outer side of the slider (903).

4. The plastic part forming mold for easy demoulding according to claim 3, characterized in that: A sliding groove (905) is provided inside the movable template (2), and the slider (903) is slidably connected inside the sliding groove (905).

5. The plastic part forming mold for easy demoulding according to claim 3, characterized in that: Three top grooves (11) are provided inside the fixed mold (3), and the three top rods (902) slide inside the three top grooves (11) respectively.

6. The plastic part forming mold for easy demoulding according to claim 3, characterized in that: The outer side of the rotating rod (904) is slidably connected to the inner side of the sliding block (903).

7. The plastic part forming mold for easy demoulding according to claim 1, characterized in that: The pneumatic auxiliary mechanism (8) comprises an air pump (801), and the output end of the air pump (801) is fixedly connected to a connecting pipe (802).

8. The plastic part forming mold for easy demoulding according to claim 7, characterized in that: A plurality of air passages (803) are provided inside the fixed mold (3), and the connecting pipe (802) is connected to the air passages (803).

Images