Injection mold opening and closing mechanism

Abstract

The utility model discloses an opening and closing mechanism of an injection mold, and belongs to the field of injection molds. An injection mold opening and closing mechanism comprises a base and an upper mold, a lower mold is fixedly connected to the base, four sets of positioning holes are formed in the lower mold, four sets of positioning columns matched with the positioning holes are fixedly connected to the upper mold, an inductor is arranged in one positioning hole, an inflation mechanism is arranged in the positioning hole, and an air outlet is formed in the other positioning hole. The air inflation mechanism divides the positioning hole into a sealing part and an opening part, and the air inflation mechanism is used for increasing the intensity of pressure in the sealing part; the utility model can overcome the problems that the product is troublesome to demould, the product is easy to damage and the applicability is poor.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold opening and closing mechanism. Background Art

[0002] Injection molding is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors and patterns, shapes from simple to complex, sizes from large to small, and precise product dimensions. The product is easy to update and can be made into complex-shaped parts. Injection molding is suitable for mass production and complex-shaped products and other molding and processing fields.

[0003] In the process of injection molding, the product is injected through mold closing, injection molding and mold opening. However, after the injection molding is completed, most of the demoulding is done manually, and some are done by ejector pins and other methods. However, the contact with the product can only demould partially, which makes product demoulding more troublesome and easily causes damage to the product. In addition, it is not suitable for products with more complex shapes and is not conducive to product demoulding. Utility Model Content

[0004] The utility model aims to solve the problems of troublesome demoulding, easy damage and poor applicability of products in the prior art, and proposes an injection mold opening and closing mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An injection mold opening and closing mechanism, comprising a base and an upper mold, wherein the base is fixedly connected to a lower mold, the lower mold is provided with four groups of positioning holes, and the upper mold is fixedly connected to four groups of positioning columns matching the positioning holes, wherein a sensor is provided in one of the positioning holes, and an inflation mechanism is provided in the positioning hole, wherein the inflation mechanism divides the positioning hole into a sealing part and an opening part, and the inflation mechanism is used to increase the pressure in the sealing part; and further comprising: an air inlet channel and an air storage cavity provided in the lower mold, wherein one end of the air inlet channel is connected to the sealing part The other end of the air inlet passage is connected with the air storage chamber, and the air storage chamber is rotatably connected with an anti-backflow mechanism, and the anti-backflow mechanism is used for the gas in the air inlet passage to enter the air storage chamber in one direction. An injection cavity is provided on the lower mold; an exhaust hole is provided in the lower mold, and the exhaust hole is connected with the air storage chamber and the injection cavity. A slide groove connected with the exhaust hole is provided in the lower mold, and a telescopic rod is fixedly connected in the slide groove, and the telescopic rod is electrically connected to the sensor, and one end of the telescopic rod is fixedly connected with a baffle, and the baffle fits tightly with the slide groove.

[0007] In order to facilitate the circulation compression of the gas in the positioning hole, preferably, the inflation mechanism includes a first spring fixedly connected to the bottom of the positioning hole, the end of the first spring is fixedly connected to a piston, the piston is tightly fitted to the inner wall of the positioning hole, and a connecting cavity is opened in the lower mold, and the connecting cavity is connected to the sealing part and the opening part.

[0008] In order to ensure the stability of gas compression, further, when the positioning post contacts the piston, the positioning post is tightly fitted with an end of the communicating cavity close to the opening portion.

[0009] In order to prevent the gas in the air storage chamber from flowing back, preferably, the anti-backflow mechanism includes a connecting rod rotatably connected in the air storage chamber, a sealing ball is fixedly connected to the end of the connecting rod, the sealing ball matches the air inlet channel, and a second spring is fixedly connected between the connecting rod and the inner wall of the air storage chamber, the second spring is always in a stretched state, and the sealing ball fits tightly with the air inlet channel.

[0010] In order to facilitate the release of gas inside the air storage chamber, preferably, the sensor is located above the piston, and when the positioning column passes through the sensor, the sensor drives the telescopic rod to extend outward, and when the positioning column is separated from the sensor, the sensor drives the telescopic rod to retract inward.

[0011] In order to facilitate the injection and molding of the product, preferably, it also includes an injection mold fixedly connected to the upper mold, the injection mold matches the injection cavity, and an injection hole is opened on the upper mold, and the injection hole runs through the injection mold.

[0012] Compared with the prior art, the utility model provides an injection mold opening and closing mechanism, which has the following beneficial effects:

[0013] 1. The injection mold opening and closing mechanism can make the gas at the bottom of the positioning hole enter the gas storage cavity through the air inlet channel by pressing the piston downward through the positioning column. At the same time, the positioning rod can prevent the gas at the bottom of the positioning hole from being discharged through the connecting cavity, ensuring that the gas can stably enter the gas storage cavity. When the positioning column is separated from the connecting cavity, the external gas can enter the bottom of the positioning hole through the connecting cavity, thereby realizing the recycling of the gas.

[0014] 2. The injection mold opening and closing mechanism can seal the air inlet channel through the connecting rod, the second spring and the sealing ball. When the air pressure in the air inlet channel is high, the air pressure pushes the sealing ball to separate from the air inlet channel. When the air pressure in the air inlet channel and the air storage cavity is the same, the second spring drives the sealing ball to seal the air inlet channel, thereby preventing the gas inside the air storage cavity from flowing back, ensuring the stability of the air pressure inside the air storage cavity, and facilitating the demoulding of the product.

[0015] 3. The opening and closing mechanism of the injection mold controls the extension and retraction of the telescopic rod through the sensor, and can automatically control the opening and closing of the exhaust hole. When the product is injected, it can automatically separate the product and avoid damage to the product, and it also has high applicability.

[0016] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model can overcome the problems of difficult demoulding of products, easy damage of products and poor applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural schematic diagram of an injection mold opening and closing mechanism.

[0018] Figure 2 The utility model discloses a schematic diagram of the structure of an upper mold in an opening and closing mechanism of an injection mold.

[0019] Figure 3 The utility model discloses a schematic diagram of the structure of a lower mold in an opening and closing mechanism of an injection mold.

[0020] Figure 4 The utility model discloses a front view cross-sectional structure diagram of a lower mold in an injection mold opening and closing mechanism.

[0021] Figure 5 The utility model is a schematic diagram of a top view of the cross-sectional structure of a lower mold in an injection mold opening and closing mechanism.

[0022] Figure 6 The utility model discloses a side view schematic diagram of the lower mold in an injection mold opening and closing mechanism.

[0023] Figure 7 An injection mold opening and closing mechanism proposed by the utility model Figure 6 Schematic diagram of the structure at A in the middle.

[0024] In the figure: 1. base; 2. lower mold; 3. upper mold; 4. injection cavity; 5. injection mold; 6. injection hole; 7. positioning hole; 8. positioning column; 9. first spring; 10. piston; 11. connecting cavity; 12. sensor; 13. air inlet channel; 14. air storage cavity; 15. connecting rod; 16. second spring; 17. sealing ball; 18. exhaust hole; 19. slide groove; 20. telescopic rod; 21. baffle. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] Example:

[0028] Reference Figure 1-Figure 7 , an injection mold opening and closing mechanism, including a base 1 and an upper mold 3, a lower mold 2 is fixedly connected to the base 1, four groups of positioning holes 7 are opened on the lower mold 2, and four groups of positioning columns 8 matching the positioning holes 7 are fixedly connected to the upper mold 3, one of the positioning holes 7 is provided with a sensor 12, and an inflation mechanism is provided in the positioning hole 7, the inflation mechanism divides the positioning hole 7 into a sealing part and an open part, and the inflation mechanism is used to increase the pressure in the sealing part, the air pressure in the open part is the same as the atmospheric pressure, and the air pressure in the sealing part is related to the position of the piston 10, the lower the piston 10 is, the greater the air pressure in the sealing part; it also includes: an air inlet channel 13 and an air storage cavity 14 opened in the lower mold 2, one end of the air inlet channel 13 is connected to the sealing part, and the air inlet channel 1 The other end of 3 is connected with the gas storage chamber 14, and the gas storage chamber 14 is rotatably connected with an anti-backflow mechanism, and the anti-backflow mechanism is used for the gas in the air inlet channel 13 to enter the gas storage chamber 14 in one direction. The lower mold 2 is provided with an injection cavity 4; an exhaust hole 18 is provided in the lower mold 2, and the exhaust hole 18 is connected with the gas storage chamber 14 and the injection cavity 4. A slide groove 19 connected with the exhaust hole 18 is provided in the lower mold 2, and a telescopic rod 20 is fixedly connected in the slide groove 19, and the telescopic rod 20 is electrically connected to the sensor 12. One end of the telescopic rod 20 is fixedly connected with a baffle 21, and the baffle 21 is tightly fitted with the slide groove 19. A sealed connection method is adopted between the baffle 21 and the slide groove 19, which can prevent the gas from being discharged through the slide groove 19 and affecting the injection molding effect of the product.

[0029] Reference Figure 1 and Figure 4 The inflation mechanism includes a first spring 9 fixedly connected to the bottom of the positioning hole 7, and a piston 10 is fixedly connected to the end of the first spring 9. The piston 10 is tightly fitted with the inner wall of the positioning hole 7. A connecting cavity 11 is opened in the lower mold 2, and the connecting cavity 11 is connected with the sealing part and the open part. When the positioning column 8 contacts the piston 10 and drives the piston 10 to move downward, the air pressure in the sealing part of the positioning hole 7 increases. When the positioning column 8 is separated from the positioning hole 7, the piston 10 will move to the initial position under the action of the first spring 9, and the air pressure inside the sealing part will decrease. Under the action of the connecting cavity 11, the external gas will enter the sealing part through the connecting cavity 11 to realize the circulation of gas.

[0030] Reference Figure 4 When the positioning column 8 contacts the piston 10, the positioning column 8 fits tightly with the end of the connecting cavity 11 close to the opening. At this time, the positioning column 8 blocks the end of the connecting cavity 11 connected to the opening, thereby preventing the gas from being discharged through the connecting cavity 11 and preventing the gas in the sealing part of the positioning hole 7 from being reduced.

[0031] Reference Figure 4-Figure 5 The anti-backflow mechanism includes a connecting rod 15 rotatably connected to the air storage chamber 14, and a sealing ball 17 is fixedly connected to the end of the connecting rod 15. The sealing ball 17 matches the air inlet passage 13. A second spring 16 is fixedly connected between the connecting rod 15 and the inner wall of the air storage chamber 14. The second spring 16 is always in a stretched state, and the sealing ball 17 fits tightly with the air inlet passage 13. Initially, the sealing ball 17 fits tightly with the air inlet passage 13 under the action of the connecting rod 15 and the second spring 16. That is to say, the gas in the air storage chamber 14 cannot enter the air inlet passage 13. When the air pressure in the air inlet passage 13 increases, the air pressure will push the sealing ball 17 to rotate into the air storage chamber 14. At this time, the gas in the air inlet passage 13 can enter the air storage chamber 14. When the air pressure in the air storage chamber 14 is the same as the air pressure in the air inlet passage 13, the sealing ball 17 will return to the initial position under the action of the second spring 16 to prevent the gas in the air storage chamber 14 from flowing back into the air inlet passage 13.

[0032] Reference Figure 4 , Figure 6 and Figure 7 The sensor 12 is located above the piston 10. When the positioning column 8 passes through the sensor 12, the sensor 12 drives the telescopic rod 20 to extend outward. When the positioning column 8 is separated from the sensor 12, the sensor 12 drives the telescopic rod 20 to retract inward. In this way, the baffle 21 can automatically seal the exhaust hole 18 according to the opening and closing state of the upper mold 3 and the lower mold 2, so that when the mold is closed, the gas is stored in the gas storage chamber 14, and when the mold is opened, the gas in the gas storage chamber 14 is discharged into the injection cavity 4. Under the action of the gas, the product adhered to the injection cavity 4 can be demolded quickly and without damage.

[0033] Reference Figure 1-Figure 3 , and also includes an injection mold 5 fixedly connected to the upper mold 3, the injection mold 5 matches the injection cavity 4, and an injection hole 6 is opened on the upper mold 3, and the injection hole 6 runs through the injection mold 5, wherein the shapes of the injection mold 5 and the injection cavity 4 are not the shapes shown in the accompanying drawings, and the staff can change them according to the shape of the injection molded product, and injection molding is performed through the injection hole 6. Under the action of the injection mold 5 and the injection cavity 4, the product can be formed, and the upper mold 3 can be connected to equipment such as a hydraulic device to ensure the stability of the lower mold 2 and the upper mold 3 during injection molding.

[0034] In the utility model, when the product is injected, the upper mold 3 and the lower mold 2 are closely fitted by means of hydraulic devices and the like. During the movement, the positioning column 8 moves into the positioning hole 7. When the positioning column 8 moves to the sensor 12, the sensor 12 drives the telescopic rod 20 to extend outward, driving the baffle 21 to move into the exhaust hole 18 until the baffle 21 seals the exhaust hole 18. Then, the positioning column 8 contacts the piston 10 and drives the piston 10 to move downward. The piston 10 compresses the gas in the sealing part of the positioning hole 7. At the same time, since the positioning column 8 is tightly fitted with the upper end of the connecting cavity 11, the gas in the sealing portion of the positioning hole 7 will not be discharged through the connecting cavity 11. As the air pressure in the sealing portion of the positioning hole 7 increases, the gas will enter the air inlet channel 13. In the initial state, the sealing ball 17 is tightly fitted with the air inlet channel 13. As the air pressure in the air inlet channel 13 increases, the air pressure will push the sealing ball 17, and the gas will enter the air storage cavity 14. When the upper mold 3 and the lower mold 2 are molded together, the piston 10 stops moving downward. At this time, the air storage cavity 14 and the lower mold 2 are closed. The air pressure in the air inlet channel 13 tends to be the same, and the sealing ball 17 will rotate to the initial position under the action of the second spring 16 to prevent the gas in the air storage chamber 14 from flowing back into the air inlet channel 13; then the staff can perform injection molding through the injection hole 6. After the injection molding is completed, the hydraulic device and other equipment are started to separate the upper mold 3 from the lower mold 2, and the positioning column 8 moves upward in the positioning hole 7. When the positioning column 8 leaves the sensor 12, the sensor 12 drives the telescopic rod 20 to shrink inward, so that the baffle 21 is separated from the exhaust hole 18, and the gas in the air storage chamber 14 is discharged into the injection cavity 4 through the exhaust hole 18. Under the action of the gas, the product can be separated from the injection cavity 4, thereby realizing rapid demoulding of the product and avoiding damage to the product during demoulding. It is also suitable for demoulding of products of various shapes; at the same time, the piston 10 moves to the initial position under the action of the first spring 9. At this time, under the action of the connecting cavity 11, the external gas can enter the sealing part of the positioning hole 7 to realize the cyclic compression of the gas and ensure the stability and continuity of the product demoulding.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An injection mold opening and closing mechanism, comprising a base (1) and an upper mold (3), characterized in that: The base (1) is fixedly connected to a lower mold (2), the lower mold (2) is provided with four groups of positioning holes (7), the upper mold (3) is fixedly connected to four groups of positioning columns (8) matching the positioning holes (7), one of the positioning holes (7) is provided with a sensor (12), the positioning hole (7) is provided with an inflation mechanism, the inflation mechanism divides the positioning hole (7) into a sealing part and an open part, and the inflation mechanism is used to increase the pressure in the sealing part; Also includes: An air inlet channel (13) and an air storage chamber (14) are provided in the lower mold (2); one end of the air inlet channel (13) is in communication with a sealing portion, and the other end of the air inlet channel (13) is in communication with the air storage chamber (14); an anti-backflow mechanism is rotatably connected in the air storage chamber (14); the anti-backflow mechanism is used for the gas in the air inlet channel (13) to enter the air storage chamber (14) in one direction; and an injection cavity (4) is provided on the lower mold (2); An exhaust hole (18) is provided in the lower mold (2), the exhaust hole (18) is connected to the air storage chamber (14) and the injection chamber (4), a slide groove (19) connected to the exhaust hole (18) is provided in the lower mold (2), a telescopic rod (20) is fixedly connected in the slide groove (19), the telescopic rod (20) is electrically connected to the sensor (12), a baffle (21) is fixedly connected to one end of the telescopic rod (20), and the baffle (21) is tightly fitted with the slide groove (19).

2. The injection mold opening and closing mechanism according to claim 1, characterized in that: The inflation mechanism comprises a first spring (9) fixedly connected to the bottom of the positioning hole (7); the end of the first spring (9) is fixedly connected to a piston (10); the piston (10) is tightly fitted with the inner wall of the positioning hole (7); a connecting cavity (11) is provided in the lower mold (2); the connecting cavity (11) is connected to the sealing part and the opening part.

3. The injection mold opening and closing mechanism according to claim 2, characterized in that: When the positioning column (8) contacts the piston (10), the positioning column (8) is tightly fitted with an end of the communicating cavity (11) close to the opening portion.

4. The injection mold opening and closing mechanism according to claim 1, characterized in that: The anti-backflow mechanism comprises a connecting rod (15) rotatably connected in the air storage chamber (14); a sealing ball (17) is fixedly connected to the end of the connecting rod (15); the sealing ball (17) matches the air intake passage (13); a second spring (16) is fixedly connected between the connecting rod (15) and the inner wall of the air storage chamber (14); the second spring (16) is always in a stretched state; and the sealing ball (17) is tightly fitted to the air intake passage (13).

5. The injection mold opening and closing mechanism according to claim 1, characterized in that: The sensor (12) is located above the piston (10). When the positioning column (8) passes through the sensor (12), the sensor (12) drives the telescopic rod (20) to extend outward. When the positioning column (8) is separated from the sensor (12), the sensor (12) drives the telescopic rod (20) to retract inward.

6. The injection mold opening and closing mechanism according to claim 1, characterized in that: It also comprises an injection mold (5) fixedly connected to the upper mold (3), the injection mold (5) matches the injection cavity (4), and an injection hole (6) is opened on the upper mold (3), and the injection hole (6) passes through the injection mold (5).

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