Injection mold for automobile parts
By adopting a design with a liftable moving mold and movable template in the injection mold of automotive parts, combined with elastic telescopic rods and air extraction components, the problems of damage and difficulty in removing injection molded parts after ejection by ejector pins are solved, realizing non-destructive removal and efficient cooling of injection molded parts, and improving production efficiency and molding consistency.
Patent Information
- Application Number
- CN202511137894.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-14
- Publication Date
- 2025-11-21
AI Technical Summary
During the injection molding process of automotive parts, the ejector pins can easily cause damage when ejecting the molded parts, and it is also difficult for workers to remove the molded parts.
An injection mold for automotive parts was designed, which uses a liftable moving mold and a movable template, combined with an elastic telescopic rod and an air extraction component. The injection molded parts are fixed by negative pressure adsorption, and a cooling chamber is set in the mold to accelerate cooling and uniform temperature reduction.
It enables non-destructive removal of injection molded parts, reduces the difficulty of operation for workers, and improves the molding efficiency and consistency of injection molded parts.
Smart Images
Figure CN120985874A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of injection molds, in particular to an injection mold for automobile parts. BACKGROUND
[0002] The automobile plastic parts are mainly formed by an injection device, and the injection device is composed of an extruder and an injection mold and is used for manufacturing plastic products of various shapes and sizes.
[0003] When the automobile parts are injection molded, the movable mold is separated from the fixed mold, and the injection molded part is ejected by a ejector pin, so that the injection molded part is separated from the inner wall of the fixed mold, and the ejector pin often applies a large force to eject the injection molded part at one time, which is easy to cause damage to the injection molded part. However, if the injection molded part is not ejected by the ejector pin, it is difficult for workers to take the injection molded part out of the fixed mold. Therefore, the application provides an injection mold for automobile parts. SUMMARY
[0004] In view of the defects of the prior art, the application provides an injection mold for automobile parts.
[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: an injection mold for automobile parts, comprising a fixed mold and a movable mold which is arranged above the fixed mold in a liftable manner, a movable mold plate is arranged below the movable mold, a plurality of elastic expansion rods are fixedly installed between the movable mold plate and the movable mold, a cavity is formed in the lower surface of the movable mold, a fixed plug is fixedly connected to the movable mold, a through hole which is matched with the fixed plug is formed in the movable mold plate, a closed ring is fixedly installed on the movable mold plate, the top end of the closed ring is located in the cavity, and the outer surface of the closed ring is tightly combined with the cavity, and the inner diameter of the closed ring is larger than the diameter of the fixed plug; a plurality of positioning rods are fixedly installed on the movable mold plate, the top end of the positioning rod is combined with the movable mold when the movable mold and the fixed mold are combined, and the fixed plug is located in the through hole. The injection mold further comprises an air extraction assembly, and the air extraction end of the air extraction assembly is in communication with the cavity.
[0006] Preferably, the air extraction assembly comprises an air extraction pump, a fixed air extraction pipe and a movable air extraction pipe. The bottom end of the fixed air extraction pipe is slidably connected with the bottom end of the movable air extraction pipe, the bottom end of the fixed air extraction pipe is fixedly connected with the air extraction end of the air extraction pump, the movable air extraction pipe is fixedly connected with the movable mold, and the top end of the movable air extraction pipe is in communication with the cavity. A first pressure relief head is fixedly installed on the movable air extraction pipe, and a first pressure relief valve is fixedly installed on the first pressure relief head.
[0007] Preferably, an upper cooling cavity is formed between the movable mold plate and the movable mold, and a lower cooling cavity is arranged in the fixed mold, and the upper cooling cavity and the lower cooling cavity form a closed cavity when the movable mold and the fixed mold are combined. The movable exhaust pipe is fixedly installed with a communication pipe, the bottom end of the communication pipe is communicated with the upper cooling cavity, and the first gas valve is fixedly installed on the movable exhaust pipe and located between the communication pipe and the top end of the movable exhaust pipe. The fixed mold is provided with a cooling box on one side, the bottom end of the cooling box is fixedly installed with a fixed pipe, the fixed pipe is fixedly installed with a first connecting pipe, the first connecting pipe is communicated with the inside of the lower cooling cavity, the movable mold is fixedly installed with a movable pipe, one end of the movable pipe is communicated with the bottom of the upper cooling cavity, the outer diameter of the other end of the movable pipe is matched with the inner diameter of the top end of the fixed pipe, the fixed pipe is fixedly installed with a second connecting pipe, one end of the second connecting pipe is fixedly connected with the top end of the cooling box, the second connecting pipe is fixedly installed with a second valve, and the first valve is fixedly installed on the fixed pipe and located between the second connecting pipe and the bottom end of the fixed pipe. The top end of the cooling box is fixedly installed with a second pressure relief head, the second pressure relief head is fixedly installed with a second pressure relief valve, the movable mold is fixedly installed with a third pressure relief head, the bottom end of the third pressure relief head is communicated with the upper cooling cavity, and the third pressure relief head is fixedly installed with a third pressure relief valve.
[0008] Compared with the prior art, the automobile accessory injection mold has the following beneficial effects: The movable mold is provided below the movable mold, a plurality of elastic expansion rods are fixedly installed between the movable mold and the movable mold, a cavity is formed in the movable mold, a fixed plug is fixedly connected to the movable mold, a through hole matched with the fixed plug is formed in the movable mold, a sealing ring is fixedly installed on the movable mold, the top end of the sealing ring is located in the cavity, and the outer surface of the sealing ring is tightly combined with the cavity, the inner diameter of the sealing ring is larger than the diameter of the fixed plug, the air exhaust end of the air exhaust assembly is communicated with the cavity, the movable mold can adsorb and fix the injection molded part, the injection molded part can be taken out from the inside of the fixed mold by the movable mold, workers can take down the injection molded part from the movable mold with less difficulty, and the injection molded part will not be damaged. The upper cooling cavity is formed between the movable mold plate and the movable mold, the lower cooling cavity is arranged in the fixed mold, and the upper cooling cavity and the lower cooling cavity form a closed cavity after the movable mold and the fixed mold are combined. The communication pipe is fixedly installed on the movable air extraction pipe and is in communication with the upper cooling cavity. The first air valve is fixedly installed on the movable air extraction pipe. The L-shaped pipe is fixedly installed on the bottom end of the fixed air extraction pipe and is fixedly connected with the top end of the cooling box. The second air valve is fixedly installed on the L-shaped pipe. The third air valve is fixedly installed on the fixed air extraction pipe. The cooling box is arranged on one side of the fixed mold. The fixed pipe is fixedly installed on the bottom end of the cooling box. The first connecting pipe is fixedly installed on the fixed pipe and is in communication with the inside of the lower cooling cavity. The movable pipe is fixedly installed on the movable mold and is in communication with the bottom of the upper cooling cavity. The second connecting pipe is fixedly installed on the fixed pipe and is fixedly connected with the top end of the cooling box. The second valve is fixedly installed on the second connecting pipe. The first valve is fixedly installed on the fixed pipe and is located between the second connecting pipe and the bottom end of the fixed pipe. During injection molding, the cooling liquid can be automatically switched in the closed cavity and the cooling box. The cooling liquid in the cooling cavity can accelerate the cooling speed of the injection molded part, improve the production efficiency of the injection molded part, and ensure that the cooling liquid has the same cooling time and cooling effect on each injection molded part. After the movable mold and the fixed mold are separated, the cooling liquid in the upper cooling cavity and the lower cooling cavity can be returned to the cooling box, and the next injection molding is not affected. Therefore, the injection mold has the advantages of high molding efficiency, high molding consistency and the like.
[0009] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application and can be implemented according to the content of the specification, the following will be described in detail with the preferred embodiments of the present application and with the drawings. The specific embodiments of the present application are given in detail by the following examples and drawings. BRIEF DESCRIPTION OF DRAWINGS
[0010] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a structural schematic diagram of the present application; Figure 2 It is a sectional structural schematic diagram of the movable mold and the fixed mold in the width direction of the present application; Figure 3 It is a sectional structural schematic diagram of the movable mold and the fixed mold in the length direction of the present application; Figure 4 It is a split structural schematic diagram of the movable mold and the movable mold plate of the present application; Figure 5 It is a structural schematic diagram of the cooling box, the air extraction pump, the fixed air extraction pipe, the fixed pipe, the movable air extraction pipe and the movable pipe of the present application; Figure 6 This is a schematic diagram of the fixed mold structure in this invention.
[0011] In the diagram: 1. Moving mold; 2. Fixed mold; 3. Injection cavity; 4. Upper cooling cavity; 5. Lower cooling cavity; 6. Movable mold plate; 7. Elastic telescopic rod; 8. Positioning rod; 9. Fixed plug; 10. Closing ring; 11. Fixed rod; 12. Cavity; 13. Cooling box; 14. Air pump; 15. Fixed air extraction pipe; 16. Moving air extraction pipe; 17. First pressure relief head; 18. Connecting pipe; 19. First air valve; 20. Fixed pipe; 21. Movable pipe; 22. First connecting pipe; 23. Second connecting pipe; 24. First valve; 25. L-pipe; 26. Second air valve; 27. Third air valve; 28. Second pressure relief head; 29. Third pressure relief head; 30. Second valve. Detailed Implementation
[0012] The following is in conjunction with the appendix Figures 1 to 6 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.
[0013] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example
[0015] Please combine Figures 1 to 6As shown, the present application provides an injection mold for automobile accessories, which comprises a fixed mold 2 and a movable mold 1 arranged above the fixed mold 2, a movable mold plate 6 arranged below the movable mold 1, a plurality of elastic expansion rods 7 fixedly installed between the movable mold plate 6 and the movable mold 1, a cavity 12 formed on the lower surface of the movable mold 1, a fixed plug 9 fixedly connected to the movable mold 1 through a fixing rod 11, a through hole formed on the movable mold plate 6 and matched with the fixed plug 9, a sealing ring 10 fixedly installed on the movable mold plate 6, the top end of the sealing ring 10 located inside the cavity 12, the outer surface of the sealing ring 10 closely combined with the cavity 12, and the inner diameter of the sealing ring 10 greater than the diameter of the fixed plug 9; and a plurality of positioning rods 8 fixedly installed on the movable mold plate 6, the top end of the positioning rod 8 combined with the movable mold 1 when the movable mold 1 and the fixed mold 2 are combined, and the fixed plug 9 located in the through hole. The injection mold further comprises an air extraction assembly, the air extraction end of the air extraction assembly in communication with the cavity 12. During injection molding, the movable mold 1 moves downward and combines with the fixed mold 2, the edge of the movable mold plate 6 first contacts the top end of the fixed mold 2 during the descending process of the movable mold 1, the fixed plug 9 enters the through hole to close the through hole when the movable mold 1 continues to move downward, and the fixed mold 2 and the movable mold plate 6 form an injection cavity 3 after the movable mold 1 and the fixed mold 2 are combined, so that the plastic melt can be delivered into the injection cavity 3 through the injection port, the plastic melt is cooled and shaped, the air extraction assembly extracts the air in the cavity 12 to make the cavity 12 in a negative pressure state, then the movable mold 1 moves upward, the movable mold plate 6 still adheres to the injection molded part under the elastic force of the plurality of elastic expansion rods 7, the fixed plug 9 is separated from the through hole, the movable mold plate 6 then adsorbs and fixes the injection molded part, the movable mold plate 6 rises to take out the injection molded part from the inside of the fixed mold 2, and then the worker can take down the injection molded part, which will not cause damage to the injection molded part and has low difficulty in taking down the injection molded part.
[0016] The air extraction assembly comprises an air extraction pump 14, a fixed air extraction pipe 15 and a movable air extraction pipe 16, the bottom end of the fixed air extraction pipe 15 is slidably connected with the movable air extraction pipe 16, the bottom end of the fixed air extraction pipe 15 is fixedly connected with the air extraction end of the air extraction pump 14, the movable air extraction pipe 16 is fixedly connected with the movable mold 1, and the top end of the movable air extraction pipe 16 is in communication with the cavity 12; a first pressure relief head 17 is fixedly installed on the movable air extraction pipe 16, and a first pressure relief valve is fixedly installed on the first pressure relief head 17. When the worker takes down the injection molded part adsorbed and fixed on the movable mold plate 6, the first pressure relief valve can be opened after the injection molded part is grabbed, so that the injection molded part can be easily taken down. Embodiment
[0017] The plastic melt injected into the injection cavity 3 has a high temperature, and the plastic melt needs a long time to cool down, which is not conducive to improving the processing efficiency of the injection molded part; the movable mold plate 6 and the movable mold 1 form an upper cooling cavity 4, and the fixed mold 2 is provided with a lower cooling cavity 5, and when the movable mold 1 and the fixed mold 2 are combined, the upper cooling cavity 4 and the lower cooling cavity 5 form a closed cavity; One side of the fixed mold 2 is provided with a cooling box 13, the bottom end of the cooling box 13 is fixedly installed with a fixed pipe 20, the fixed pipe 20 is fixedly installed with a first connecting pipe 22, the first connecting pipe 22 is in communication with the inside of the lower cooling cavity 5, the movable mold 1 is fixedly installed with a movable pipe 21, one end of the movable pipe 21 is in communication with the bottom of the upper cooling cavity 4, the outer diameter of the other end of the movable pipe 21 is matched with the inner diameter of the top end of the fixed pipe 20, and after the movable mold 1 and the fixed mold 2 are combined, the other end of the movable pipe 21 can be inserted into the top end of the fixed pipe 20; the fixed pipe 20 is fixedly installed with a second connecting pipe 23, one end of the second connecting pipe 23 is fixedly connected with the top end of the cooling box 13, the second connecting pipe 23 is fixedly installed with a second valve 30, and the fixed pipe 20 is fixedly installed with a first valve 24 between the second connecting pipe 23 and the bottom end of the fixed pipe 20; The movable exhaust pipe 16 is fixedly installed with a communication pipe 18, the bottom end of the communication pipe 18 is in communication with the upper cooling cavity 4, and the movable exhaust pipe 16 is fixedly installed with a first air valve 19 between the communication pipe 18 and the top end of the movable exhaust pipe 16; the bottom end of the fixed exhaust pipe 15 is fixedly installed with an L-shaped pipe 25, the bottom end of the L-shaped pipe 25 is fixedly connected with the top end of the cooling box 13, the L-shaped pipe 25 is fixedly installed with a second air valve 26, and the fixed exhaust pipe 15 is fixedly installed with a third air valve 27; The top end of the cooling box 13 is fixedly installed with a second pressure relief head 28, the second pressure relief head 28 is fixedly installed with a second pressure relief valve, the movable mold 1 is fixedly installed with a third pressure relief head 29, the bottom end of the third pressure relief head 29 is in communication with the upper cooling cavity 4, and the third pressure relief head 29 is fixedly installed with a third pressure relief valve; After the injection cavity 3 is filled with plastic melt, the first air valve 19 and the second air valve 26 are closed and the third air valve 27 is opened, the exhaust pump 14 is started to exhaust the gas in the closed cavity, so that the closed cavity is in a negative pressure state, then the first valve 24 is opened and the second valve 30 is still in a closed state, the cooling liquid in the cooling box 13 is sucked into the closed cavity to uniformly and quickly cool the plastic melt, thereby improving the processing efficiency of the injection molded part; After cooling, open the second air valve 26, the third air valve 27 remains closed state, the air pump 14 will be cooled inside the tank 13 air, so that the inside of the cooling tank 13 in a negative pressure state, then open the second valve 30, the first valve 24 remains closed state, the cooling liquid in the closed cavity will be returned to the inside of the cooling tank 13, not only can the cooling liquid after heat absorption to be cooled again, to ensure that the cooling time of the plastic melt remains constant, and avoid the closed cavity left cooling liquid, so that the new plastic melt completely filled injection cavity 3 appears to be a problem of the fixed shape.
[0018] The above description is only the preferred embodiment of the present application, not any form of the present invention is limited; for the ordinary skill in the art can be shown in the drawings and the above described by the present application; however, for those skilled in the art without departing from the scope of the present invention technical solutions, using the above disclosed technical content of some changes, modifications and evolution of the equivalent changes, are equivalent embodiments of the present application; at the same time, for any equivalent changes, modifications and evolution of the above embodiments according to the essence of the present invention, still belong to the scope of the present invention technical solutions within the protection range.
Claims
1. An injection mold for an automobile part, comprising a fixed mold (2) and a movable mold (1) which is arranged above the fixed mold (2) and is movable up and down, characterized in that: The lower part of the movable die (1) is provided with a movable die plate (6), a plurality of elastic telescopic rods (7) are fixedly installed between the movable die plate (6) and the movable die (1), a cavity (12) is formed in the lower surface of the movable die (1), a fixed plug (9) is fixedly connected to the movable die (1), a through hole is formed in the movable die plate (6) and is matched with the fixed plug (9), a closing ring (10) is fixedly installed on the movable die plate (6), the top end of the closing ring (10) is located in the cavity (12), the outer surface of the closing ring (10) is tightly combined with the cavity (12), and the inner diameter of the closing ring (10) is larger than the diameter of the fixed plug (9); a plurality of positioning rods (8) are fixedly installed on the movable die plate (6), and when the movable die (1) and the fixed die (2) are combined, the top end of the positioning rod (8) is combined with the movable die (1), and the fixed plug (9) is located in the through hole; Further comprising an air extraction assembly, the air extraction end of the air extraction assembly is communicated with the cavity (12).
2. The injection mold for an automobile part according to claim 1, wherein: The air extraction assembly comprises an air extraction pump (14), a fixed air extraction pipe (15) and a movable air extraction pipe (16); The bottom end of the fixed air extraction pipe (15) is fixedly connected with the air extraction end of the air extraction pump (14), the movable air extraction pipe (16) is fixedly connected with the movable die (1), and the top end of the movable air extraction pipe (16) is communicated with the cavity (12); A first pressure relief head (17) is fixedly installed on the movable air extraction pipe (16), and a first pressure relief valve is fixedly installed on the first pressure relief head (17).
3. The injection mold for an automobile part according to claim 1, wherein: An upper cooling cavity (4) is formed between the movable die plate (6) and the movable die (1), and a lower cooling cavity (5) is arranged in the fixed die (2), and when the movable die (1) and the fixed die (2) are combined, the upper cooling cavity (4) and the lower cooling cavity (5) form a closed cavity; A communication pipe (18) is fixedly installed on the movable air extraction pipe (16), the bottom end of the communication pipe (18) is communicated with the upper cooling cavity (4), a first air valve (19) is fixedly installed on the movable air extraction pipe (16) and located between the communication pipe (18) and the top end of the movable air extraction pipe (16), an L-shaped pipe (25) is fixedly installed on the bottom end of the fixed air extraction pipe (15), the bottom end of the L-shaped pipe (25) is fixedly connected with the top end of a cooling box (13), a second air valve (26) is fixedly installed on the L-shaped pipe (25), and a third air valve (27) is fixedly installed on the fixed air extraction pipe (15); The fixed mold (2) is provided with a cooling box (13) on one side, a fixed pipe (20) is fixedly installed on the bottom end of the cooling box (13), a first connecting pipe (22) is fixedly installed on the fixed pipe (20), the first connecting pipe (22) is communicated with the inside of the lower cooling cavity (5), a movable pipe (21) is fixedly installed on the movable mold (1), one end of the movable pipe (21) is communicated with the bottom of the upper cooling cavity (4), the outer diameter of the other end of the movable pipe (21) is matched with the inner diameter of the top end of the fixed pipe (20), a second connecting pipe (23) is fixedly installed on the fixed pipe (20), one end of the second connecting pipe (23) is fixedly connected with the top end of the cooling box (13), a second valve (30) is fixedly installed on the second connecting pipe (23), a first valve (24) is fixedly installed on the fixed pipe (20) and between the second connecting pipe (23) and the bottom end of the fixed pipe (20); A second pressure relief head (28) is fixedly installed on the top end of the cooling box (13), a second pressure relief valve is fixedly installed on the second pressure relief head (28), a third pressure relief head (29) is fixedly installed on the movable mold (1), the bottom end of the third pressure relief head (29) is communicated with the upper cooling cavity (4), and a third pressure relief valve is fixedly installed on the third pressure relief head (29).