Runner-free efficient injection mold

Abstract

The utility model discloses a runner-free efficient injection mold, and particularly relates to the technical field of injection molds, the runner-free efficient injection mold comprises an injection mold body and a cooling barrel arranged on the outer side of the injection mold body, the injection mold body comprises a runner-free upper mold and an injection lower mold, and the runner-free upper mold is arranged above the injection lower mold; the bottom of the cooling barrel is fixedly connected with a first telescopic device, the output end of the first telescopic device penetrates through the cooling barrel in a sealed mode and is fixedly connected to the injection molding lower mold, the bottom of the injection molding lower mold is fixedly connected with a sealing barrel, a material ejecting module is arranged in the sealing barrel, and a turbulent flow structure is arranged in the cooling barrel. A driving structure for driving the turbulent flow structure to rotate is arranged on the cooling barrel; a refrigerator is fixedly connected to the outer surface of the cooling barrel and used for refrigerating water in the cooling barrel, and a liquid level meter is fixedly connected to the outer surface of the cooling barrel; the technical problems that a runner-free injection mold is high in cooling cost and large in structural design difficulty are solved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and more specifically, to a runnerless high-efficiency injection mold. Background Technology

[0002] So-called runnerless injection molding refers to a process where the material in the runner remains in a hot, flowing state throughout the injection molding process. Upon mold opening, only the solidified product is removed, without any solidified material remaining in the runner. Compared to traditional injection molds, this is an advanced injection molding technology and a hot topic in the development of plastic injection molding processes. Its biggest advantages are improved material utilization, reduced production costs, and guaranteed part quality.

[0003] Currently, the prerequisite for removing solidified products from runnerless injection molds is to cool the injection material. The cooling method is mostly to achieve water cooling by opening serpentine cooling channels in the lower mold. Although this method meets the molding quality of the injection material, setting cooling channels in the lower mold, especially in miniaturized injection molds, increases the difficulty of mold design and manufacturing, and also increases the production cost of the mold. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a runnerless high-efficiency injection mold, comprising an injection mold body and a cooling tank disposed outside the injection mold body. The injection mold body includes a runnerless upper mold and a lower injection mold. The runnerless upper mold is disposed above the lower injection mold. A telescopic device is fixedly connected to the bottom of the cooling tank. The output end of the telescopic device passes through the cooling tank and is fixedly connected to the lower injection mold. A sealing cylinder is fixedly connected to the bottom of the lower injection mold. An ejector module is disposed inside the sealing cylinder. A turbulence-inducing structure is disposed inside the cooling tank. A driving structure for driving the turbulence-inducing structure to rotate is disposed on the cooling tank.

[0006] In a preferred embodiment, a refrigeration unit is fixedly connected to the outer surface of the cooling tank for cooling the water inside the cooling tank, and a level gauge is fixedly connected to the outer surface of the cooling tank, with the detection end of the level gauge extending into the cooling tank.

[0007] In a preferred embodiment, an mounting plate is fixedly connected to the outer surface of the cooling tank, and a rubber tube is fixedly connected between the lower injection mold and the cooling tank.

[0008] In a preferred embodiment, the ejector module includes a second telescopic device, which is fixedly connected inside the sealing cylinder. The output end of the second telescopic device is fixedly connected to an ejector rod, which passes through the lower injection mold and extends into the mold cavity of the lower injection mold.

[0009] In a preferred embodiment, an extension tube is fixedly connected to the bottom of the cooling tank, and the extension tube is located below the sealing tube.

[0010] In a preferred embodiment, the turbulence structure includes a ring frame rotatably connected to the inner bottom of the cooling tank, and a turbulence plate is fixedly connected to the inner side of the ring frame.

[0011] In a preferred embodiment, the drive structure includes a rotating device fixedly connected to the bottom of the cooling tank, the output end of the rotating device being sealed through the cooling tank and extending into the cooling tank, and a gear being fixedly connected to the output end of the rotating device. A gear block assembly is fixedly connected to the outer side of the ring frame, and the gear is meshed with the gear block assembly.

[0012] In a preferred embodiment, the ring frame has an overflow section, and the baffle plate has baffle holes.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model utilizes a cooling tank set on the outside of the injection mold body. By cooling water in the cooling tank, the purpose is to control the telescopic device to drive the lower injection mold into the cooling tank. In this way, the low temperature cooling water surrounding the mold cavity can promote the cooling and molding of the injection molded product. This cooling method can reduce the design difficulty of realizing the cooling function of the injection mold body, thereby reducing the manufacturing cost of the mold and improving the operating efficiency of the injection mold.

[0015] 2. This utility model, by setting a turbulence component in the cooling tank, can make the heat-absorbing cooling water have fluidity and mixing degree by reciprocating agitation in the cooling tank. This can improve the quality of heat absorption and cooling of injection molded products and ensure the uniformity of cooling water temperature. Attached Figure Description

[0016] Figure 1 This is a first-view structural schematic diagram of a runnerless high-efficiency injection mold according to the present invention;

[0017] Figure 2 This is a second-view structural schematic diagram of a runnerless high-efficiency injection mold according to the present invention;

[0018] Figure 3 This utility model Figure 1 A structural diagram excluding the injection mold body and the plastic cylinder;

[0019] Figure 4 This is a schematic diagram of the structure of the injection mold body of this utility model;

[0020] Figure 5 This is a structural schematic diagram of the sealing cylinder and the top material module of this utility model;

[0021] Figure 6 This is a schematic diagram of the turbulence structure and drive structure of this utility model.

[0022] The attached figures are labeled as follows: 1. Injection mold body; 2. Runnerless upper mold; 21. Injection lower mold; 3. Cooling tank; 4. Telescopic device one; 5. Sealing cylinder; 6. Ejector module; 61. Telescopic device two; 62. Ejector rod; 7. Baffle structure; 71. Ring frame; 72. Baffle plate; 8. Drive structure; 81. Rotating device; 82. Gear; 9. Refrigeration unit; 10. Level gauge; 11. Extension cylinder; 12. Mounting plate; 13. Glue cylinder; 14. Overflow area; 15. Baffle hole; 16. Tooth block assembly. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] See also Figures 1-6 This utility model provides a runnerless high-efficiency injection mold, including an injection mold body 1. The injection mold body 1 includes a runnerless upper mold 2 and an injection lower mold 21. The runnerless upper mold 2 is disposed above the injection lower mold 21. When in use, the runnerless upper mold 2 can be used with an existing casting machine to pour injection materials, and can be used with lifting equipment such as a hydraulic press to control the opening and closing of the runnerless upper mold 2. The injection mold body 1 of this application also includes a pouring port and a runner provided on the runnerless upper mold 2. Since the injection mold body 1 is prior art, it will not be described in detail here.

[0025] In this embodiment, a cooling tank 3 is provided on the outer side of the injection mold body 1.

[0026] The top of the cooling tank 3 is open, and cooling water can be stored inside the cooling tank 3 to cool the injection material of the injection mold body 1.

[0027] In this embodiment: a refrigeration unit 9 is fixedly connected to the outer surface of the cooling tank 3. The refrigeration unit 9 is used to cool the water in the cooling tank 3. A level gauge 10 is fixedly connected to the outer surface of the cooling tank 3. The detection end of the level gauge 10 extends into the cooling tank 3.

[0028] The refrigeration unit 9 is used for low-temperature cooling water, which facilitates the cooling of injection molding materials. The level gauge 10 can monitor the level of cooling water in the cooling tank 3 in real time so that cooling water can be replenished in the cooling tank 3 in a timely manner.

[0029] In this embodiment, a mounting plate 12 is fixedly connected to the outer surface of the cooling tank 3.

[0030] Mounting plate 12 can be used with bolts to fix cooling tank 3 in the designated working position.

[0031] In this embodiment, a rubber tube 13 is fixedly connected between the injection mold 21 and the cooling tank 3.

[0032] The rubber sleeve 13 can be made of flexible rubber material, so that when the injection mold body 1 rises and falls above the cooling tank 3, the connection can be flexibly sealed in real time, thus preventing foreign objects from falling into the cooling tank 3.

[0033] In this embodiment: a telescopic device 4 is fixedly connected to the bottom of the cooling tank 3, and the output end of the telescopic device 4 passes through the cooling tank 3 and is fixedly connected to the injection mold 21.

[0034] In this application, at least two sets of telescopic devices 4 are provided. The telescopic device 4 adopts a telescopic motor. The output end of the telescopic motor and the cooling tank 3 can be connected by a sealing ring to achieve dynamic sealing protection. When it is necessary to cool the injection material in the injection mold body 1, the lower injection mold 21 can be pulled down by the telescopic device 4 and immersed in the cooling tank 3. Then the mold cavity in the lower injection mold 21 can be surrounded by cooling water to absorb heat, so that the injection product in the mold cavity can be cooled and formed quickly.

[0035] It is worth noting that when the telescopic device 4 drives the lower injection mold 21 to descend, the hydraulic equipment acting on the runnerless upper mold 2, such as the hydraulic press, also needs to perform complementary movements along with the descent distance of the telescopic device 4, so that the runnerless upper mold 2 and the lower injection mold 21 are in a closed and sealed state.

[0036] Furthermore, the injection mold body 1 currently includes a runnerless upper mold 2 and an injection lower mold 21, both of which typically have matching mold cavities. The mold cavity of the runnerless upper mold 2 is relatively smaller than the mold cavity height of the injection lower mold 21. Therefore, the specific height at which the injection mold body 1 descends into the cooling tank 3 can be adaptively controlled according to the mold cavity heights of the runnerless upper mold 2 and the injection lower mold 21, ensuring that the cooling water effectively surrounds the outside of the mold cavity. Especially for small injection molds, external cooling can more conveniently cool the mold body, thus solving the problem of inconvenient design of cooling channels in small injection molds.

[0037] In this embodiment: a sealing cylinder 5 is fixedly connected to the bottom of the injection mold 21, and an ejector module 6 is provided inside the sealing cylinder 5. The ejector module 6 includes a telescopic device 61, which is fixedly connected inside the sealing cylinder 5. An ejector rod 62 is fixedly connected to the output end of the telescopic device 61. The ejector rod 62 passes through the injection mold 21 and extends into the mold cavity of the injection mold 21.

[0038] The connection between the ejector rod 62 and the lower injection mold 21 is also dynamically sealed by a sealing ring. The telescopic device 61 can also be a telescopic motor. The telescopic motor drives the ejector rod 62 to push upward. When the upper mold 2 without runner and the lower injection mold 21 are open, the molded product can be easily ejected. The setting of the sealing cylinder 5 can make the ejector module 6 be in a sealed environment in the cooling water.

[0039] In this embodiment: the bottom of the cooling tank 3 is fixedly connected to the extension tube 11, which is located below the sealing tube 5.

[0040] The extension tube 11 is positioned so that when the injection mold body 1 descends into the cooling tank 3, the position of the extension tube 11 can provide a clearance area for the sealing tube 5.

[0041] In this embodiment: a turbulence structure 7 is provided inside the cooling tank 3. The turbulence structure 7 includes a ring frame 71, which is rotatably connected to the inner bottom of the cooling tank 3. A turbulence plate 72 is fixedly connected to the inner side of the ring frame 71.

[0042] The ring frame 71 can be rotatably connected to the cooling tank 3 via bearings. The rotation of the ring frame 71 can drive the baffle 72 to push the cooling water. By agitating the cooling water, the heat-absorbing cooling water can be made to have fluidity and mixing, which can improve the quality of heat absorption and cooling of injection molded products and ensure the uniformity of cooling water temperature.

[0043] In this embodiment: the drive structure 8 includes a rotating device 81, which is fixedly connected to the bottom of the cooling tank 3. The output end of the rotating device 81 passes through the cooling tank 3 and extends into the cooling tank 3. A gear 82 is fixedly connected to the output end of the rotating device 81. A tooth block assembly 16 is fixedly connected to the outer side of the ring frame 71. The gear 82 is meshed with the tooth block assembly 16.

[0044] The rotating device 81 uses a rotating motor with forward and reverse drive, and the connection between the output end of the rotating motor and the cooling tank 3 can be sealed by a sealed bearing to achieve a sealed rotation connection. The tooth block assembly 16 is composed of multiple tooth blocks. When the rotating motor drives the gear 82 to rotate forward and reverse, the gear 82 can mesh with the tooth block assembly 16 to drive the ring frame 71 to rotate back and forth in the cooling tank 3. In this way, the baffle 72 can reciprocate to help the cooling water flow, which can promote the cooling water to absorb heat and cool the injection material in the mold cavity.

[0045] An overflow section 14 is provided on the ring frame 71, and a turbulence hole 15 is provided on the turbulence plate 72.

[0046] The overflow section 14 can promote the flow of cooling water through the ring frame 71, thus avoiding the problem of water blockage in the ring frame 71. When the baffle 72 assists in pushing the cooling water, the cooling water can pass through the baffle hole 15, which can promote the uniformity of cooling water mixing and ensure temperature uniformity.

[0047] In this utility model, the telescopic motor, rotary motor, refrigeration unit 9, and level gauge 10 are all general standard parts or devices known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high efficiency injection mold with no gate, characterized in that: The utility model relates to an injection mold body (1) and the cooling barrel (3) of setting at the outside of injection mold body (1) are included, injection mold body (1) includes no runner top die (2) and injection lower die (21), no runner top die (2) sets at the top of injection lower die (21), the bottom of cooling barrel (3) is fixedly connected with telescopic device one (4), the output of telescopic device one (4) is sealed through cooling barrel (3) and is fixedly connected on injection lower die (21), the bottom of injection lower die (21) is fixedly connected with sealing cylinder (5), the top material module (6) is arranged in sealing cylinder (5), cooling barrel (3) is provided with the turbulence structure (7), cooling barrel (3) is provided with the drive structure (8) for driving the rotation of turbulence structure (7).

2. A high efficiency injection mold without a runner according to claim 1, characterized in that: The outer surface of the cooling barrel (3) is fixedly connected with a refrigeration machine (9), and the refrigeration machine (9) is used for refrigerating water in the cooling barrel (3). The outer surface of the cooling barrel (3) is fixedly connected with a liquid level gauge (10), and the detection end of the liquid level gauge (10) extends into the cooling barrel (3).

3. A high efficiency injection mold without a runner according to claim 1, characterized in that: The outer surface of the cooling barrel (3) is fixedly connected with a mounting disc (12), and the injection lower die (21) and the cooling barrel (3) are fixedly connected with a rubber tube (13).

4. The high efficiency injection mold without a runner according to claim 1, wherein: The top material module (6) includes telescopic device two (61), which is fixedly connected in the sealing cylinder (5). The output end of the telescopic device two (61) is fixedly connected with a ejector rod (62), which is sealed through the injection lower die (21) and extends into the cavity of the injection lower die (21).

5. A high efficiency injection mold without a runner according to claim 1, characterized in that: The bottom of the cooling barrel (3) is fixedly connected with an extension cylinder (11), which is located below the sealing cylinder (5).

6. A high efficiency injection mold without a runner according to claim 1, characterized in that: The turbulence structure (7) includes a ring frame (71), which is rotatably connected to the inner bottom of the cooling barrel (3). The inner side of the ring frame (71) is fixedly connected with a turbulence plate (72).

7. A high efficiency injection mold without runners as claimed in claim 6 wherein: The drive structure (8) includes a rotating device (81), which is fixedly connected to the bottom of the cooling barrel (3). The output end of the rotating device (81) is sealed through the cooling barrel (3) and extends into the cooling barrel (3). The output end of the rotating device (81) is fixedly connected with a gear (82). The outer side of the ring frame (71) is fixedly connected with a gear block group (16). The gear (82) is meshingly connected to the gear block group (16).

8. A high efficiency injection mold without a runner according to claim 6, characterized in that: The ring frame (71) is provided with an overflow interval (14), and the turbulence plate (72) is provided with a turbulence hole (15).

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