An injection mold

Abstract

The utility model relates to the technical field of plastic forming technology provides an injection mold, including upper top plate, upper die carrier, lower bottom plate and lower die kernel, upper die carrier has the upper installation groove, is equipped with lower die kernel in the upper installation groove, upper top plate slidingly is equipped with the injection glue pipe that penetrates upper top plate, upper die carrier and lower die kernel, and is equipped with support block, ejector plate assembly, ejector rod assembly, guide rod assembly, support rod assembly and reset component between lower die carrier and lower bottom plate, lower die carrier has the lower installation groove, is equipped with lower die kernel in the lower installation groove, forms injection cavity between lower die kernel and lower die kernel, and the ejector rod assembly includes many round top rods and a plurality of inclined ejector rod assemblies. When demoulding, the injection part in injection cavity pushes the ejector plate assembly, and then drives the inclined ejector rod assembly and round top rod to stretch out from lower die kernel, and pushes the injection part in injection cavity to demould.

Description

Technical Field

[0001] This utility model relates to the field of plastic molding technology, specifically to an injection mold. Background Technology

[0002] Injection molding is a widely used process in the production of plastic products. It involves injecting molten plastic material into a mold, which then cools and solidifies to obtain the desired plastic product. The advantages of injection molding include high production speed and efficiency, automated operation, a wide variety of designs and shapes (from simple to complex), and sizes ranging from large to small. It also produces dimensionally accurate products, facilitates product updates and upgrades, and can create complex shapes. Injection molding is suitable for mass production and molding processes involving complex shapes.

[0003] After injection molding, a key step is to remove the finished product from the mold, i.e. the demolding process. However, existing injection molds often encounter problems such as mold adhesion and demolding difficulties during the demolding process. In addition, the snap-fit ​​structure on the outer surface of the injection part inside the injection mold has problems such as being unable to be formed or being difficult to demold after the snap-fit ​​is formed. Utility Model Content

[0004] This utility model proposes an injection mold with a snap-fit ​​injection cavity that facilitates demolding.

[0005] An injection mold includes an upper mold assembly and a lower mold assembly. The upper mold assembly includes an upper top plate and an upper mold frame fixedly connected to the upper top plate. The upper mold frame has an upper mounting groove on its side away from the upper top plate. An upper mold core is provided in the upper mounting groove. An injection tube is slidably provided on the upper top plate, the upper mold frame and the upper mold core.

[0006] The lower mold assembly includes a lower base plate and support blocks fixed on both sides of the lower base plate. A lower mold frame is provided on the side of the two support blocks away from the lower base plate. An ejector plate assembly, an ejector rod assembly, a guide rod assembly, a support rod assembly, and a reset assembly are provided between the lower mold frame and the lower base plate. A lower mounting groove is provided on the side of the lower mold frame away from the lower base plate. A lower mold core is provided in the lower mounting groove. An injection cavity is formed between the upper mold core and the lower mold core.

[0007] The ejector assembly includes multiple round ejector rods and multiple angled ejector rod assemblies. One end of the round ejector rod is fixedly connected to the ejector plate assembly, and the other end passes through the lower mold frame and the lower mold core. The angled ejector rod assembly and the lower mold core form an injection cavity.

[0008] With the above structure, when the injection part in the injection cavity is demolded, the multiple angled ejector assemblies and the lower mold core push the ejector plate assembly, which in turn drives the angled ejector assemblies to extend out of the lower mold core, making it easier to demold the injection part in the injection cavity. When the ejector plate assembly is pushed, the round ejector rod also extends out of the lower mold core to assist the injection part in the injection cavity in demolding.

[0009] To facilitate demolding of the injection molded parts, the inclined ejector assembly includes a groove fixed to the ejector plate assembly. A first inclined ejector and a second inclined ejector are slidably disposed in the groove, penetrating the lower mold base and the lower mold core. The end of the first inclined ejector away from the groove extends into the space between the lower mold core and the lower mold core to form an injection cavity.

[0010] An injection rod is provided near the second inclined ejector pin in the lower mold core. The end of the second inclined ejector pin away from the slide groove extends into the lower mold core, and an injection cavity is formed between the second inclined ejector pin, the injection rod, and the lower mold core.

[0011] In order to enable the ejector plate assembly to move in a predetermined direction, the support rod assembly includes multiple support rods, one end of which is fixedly connected to the lower base plate and the other end is fixedly connected to the bottom surface of the lower mold frame;

[0012] The guide rod assembly includes a guide rod and a guide ring sleeved on the guide rod. One end of the guide rod is fixedly connected to the lower base plate, and the other end is fixedly connected to the bottom surface of the lower mold frame.

[0013] Preferably, the ejector plate assembly includes an upper ejector plate and a lower ejector plate, the guide rod passes through the upper ejector plate and the lower ejector plate, the guide ring has a flange in the middle, the upper top surface of the flange abuts against the lower bottom surface of the upper ejector plate, the lower ejector plate has a flange mounting groove, and the lower bottom surface of the flange abuts against the top surface of the flange mounting groove.

[0014] In order to enable the ejector plate assembly to automatically reset, the reset assembly includes a reset rod and a reset spring sleeved on the reset rod. One end of the reset rod is fixedly connected to the upper ejector plate, and the other end passes through the lower mold frame. The lower bottom surface of the lower mold frame is provided with a spring mounting groove. One end of the reset spring abuts against the bottom surface of the spring mounting groove, and the other end abuts against the top surface of the upper ejector plate.

[0015] To accelerate the cooling of the injection molded parts, liquid cooling pipes are provided inside the upper mold core and the lower mold core. Both the upper mold frame and the lower mold frame are provided with liquid inlet and liquid outlet. The liquid inlet is connected to the liquid cooling pipe through an inlet pipe, and the liquid outlet is connected to the liquid cooling pipe through an outlet pipe.

[0016] After adopting the above technical solution, the beneficial effects of this utility model are:

[0017] 1. The injection mold provided by this utility model is provided with a lower mold core, an ejector plate assembly, multiple round ejector rods and multiple inclined ejector rod assemblies. The multiple inclined ejector rod assemblies and the lower mold core form an injection cavity. When the injection part is demolded, the ejector plate assembly is pushed, which in turn drives the inclined ejector rod assemblies to extend out of the lower mold core, making it easier to demold the injection part in the injection cavity. When the ejector plate assembly is pushed, the round ejector rods also extend out of the lower mold core, pushing the injection part in the injection cavity to demold, making it easier to demold the injection part.

[0018] 2. The injection mold provided by this utility model is provided with a slide groove, an injection rod, a first inclined ejector rod, and a second inclined ejector rod. The first inclined ejector rod and the lower mold core form an injection cavity for forming the snap-fit ​​of the injection molded part. The second inclined ejector rod and the injection rod form an injection cavity with the lower mold core for forming the snap-fit ​​connection hole of the injection molded part. The setting of the first and second inclined ejector rods makes it easier to generate the snap-fit ​​structure on the outer surface of the injection molded part. Moreover, during demolding, the first and second inclined ejector rods extend along with the ejector plate assembly to facilitate demolding of the injection molded part. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of an injection mold;

[0020] Figure 2 This is an exploded structural diagram of an injection mold;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the injection molded part;

[0022] Figure 4 This is a structural schematic diagram of the upper mold assembly;

[0023] Figure 5 This is a structural schematic diagram of the lower mold assembly;

[0024] Figure 6 This is a structural diagram of the lower mold assembly.

[0025] Wherein: 1-Upper top plate; 2-Upper mold base; 20-Upper mounting slot; 21-Upper mold core; 22-Liquid cooling pipe; 3-Lower mold base; 30-Lower mounting slot; 31-Lower mold core; 4-Lower base plate; 41-Support rod; 5-Support block; 6-Ejector plate assembly; 61-Upper ejector plate; 62-Lower ejector plate; 7-Reset assembly; 71-Reset rod; 72-Reset spring; 8-Slide groove; 81-First inclined ejector rod; 82-Second inclined ejector rod; 83-Injection rod; 84-Dome rod; 9-Guide rod. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] The orientations mentioned in this specification are based on the orientation of this utility model during normal operation, and do not limit its orientation during storage and transportation. They only represent relative positional relationships and do not represent absolute positional relationships.

[0028] like Figure 1-6 As shown, an injection mold includes an upper mold assembly and a lower mold assembly. The upper mold assembly includes an upper top plate 1 and an upper mold frame 2 fixedly connected to the upper top plate 1. The upper mold frame 2 has an upper mounting groove 20 on the side away from the upper top plate 1, and an upper mold core 21 is provided in the upper mounting groove 20. The upper top plate 1 is slidably provided with an injection tube that passes through the upper top plate 1, the upper mold frame 2, and the upper mold core 21. The lower mold assembly includes a lower base plate 4 and support blocks 5 fixed on both sides of the lower base plate 4. The side of the two support blocks 5 away from the lower base plate 4 has a lower mold frame 3. The lower mold frame 3 and the lower base plate 4 are provided with an ejector plate assembly 6, an ejector rod assembly, a guide rod assembly, a support rod assembly, and a reset assembly 7. The side of the lower mold frame 3 away from the lower base plate 4 has a lower mounting groove 30, and a lower mold core 31 is provided in the lower mounting groove 30. An injection cavity is formed between the upper mold core 21 and the lower mold core 31. The injection tube is connected to the injection cavity, and the injection cavity is used for shaping the injection molded part.

[0029] The ejector assembly includes multiple round ejector rods 84 and multiple angled ejector rod assemblies. One end of the round ejector rod 84 is fixedly connected to the ejector plate assembly 6, and the other end passes through the lower mold base 3 and the lower mold core 31. An injection cavity is formed between the angled ejector rod assembly and the lower mold core 31. The injection cavity is used to form the snap-fit ​​connection hole and connection hole of the injection molded part. When the injection molded part in the injection cavity formed by the multiple angled ejector rod assemblies and the lower mold core 31 is demolded, it pushes the ejector plate assembly 6, thereby causing the angled ejector rod assembly to extend out of the lower mold core 31, making it easier to demold the injection molded part in the injection cavity. When the ejector plate assembly 6 is pushed, the round ejector rods 84 also extend out of the lower mold core 31, pushing the injection molded part in the injection cavity to demold.

[0030] The inclined ejector assembly includes a groove 8 fixed to the ejector plate assembly 6. A first inclined ejector 81 and a second inclined ejector 82 are slidably disposed in the groove 8, penetrating the lower mold base 3 and the lower mold core 31. The end of the first inclined ejector 81 away from the groove 8 extends into the space between the lower mold core 31 and the mold core 31 to form an injection cavity. An injection rod 83 is provided near the second inclined ejector 82 in the lower mold core 31. The end of the second inclined ejector 82 away from the groove 8 extends into the lower mold core 31. The second inclined ejector 82 and the injection rod 83 form an injection cavity with the lower mold core 31 to form a snap-fit ​​connection hole for the injection molded part. The arrangement of the first inclined ejector 81 and the second inclined ejector 82 makes it easier to generate a snap-fit ​​structure on the outer surface of the injection molded part. During demolding, the first inclined ejector 81 and the second inclined ejector 82 extend out with the ejector plate assembly 6 to facilitate demolding of the injection molded part.

[0031] The support rod assembly includes multiple support rods 41. One end of the support rod 41 is fixedly connected to the lower base plate 4, and the other end is fixedly connected to the bottom surface of the lower mold base 3. The guide rod assembly includes guide rods 9 and guide rings sleeved on the guide rods 9. There are four guide rods 9. One end of the guide rod 9 is fixedly connected to the lower base plate 4, and the other end is fixedly connected to the bottom surface of the lower mold base 3. The ejector plate assembly 6 can move along the direction of the support rods 41, making the movement more stable and avoiding damage to the injection molded part due to uneven force during demolding.

[0032] The ejector plate assembly 6 includes an upper ejector plate 61 and a lower ejector plate 62. A guide rod 9 passes through the upper ejector plate 61 and the lower ejector plate 62. A flange is provided in the middle of the guide ring. The upper top surface of the flange abuts against the lower bottom surface of the upper ejector plate 61. The lower ejector plate 62 is provided with a flange mounting groove. The lower bottom surface of the flange abuts against the top surface of the flange mounting groove.

[0033] The reset assembly 7 includes a reset rod 71 and a reset spring 72 sleeved on the reset rod 71. In this embodiment, four reset rods 71 ​​are provided. One end of the reset rod 71 is fixedly connected to the upper ejector plate 61, and the other end passes through the lower mold frame 3. The lower bottom surface of the lower mold frame 3 is provided with a spring mounting groove. One end of the reset spring 72 abuts against the bottom surface of the spring mounting groove, and the other end abuts against the upper top surface of the upper ejector plate 61. The reset assembly 7 enables the ejector plate assembly 6 to automatically reset.

[0034] The upper mold core 21 and the lower mold core 31 are equipped with liquid cooling pipes 22. The upper mold frame 2 and the lower mold frame 3 are equipped with liquid inlet and liquid outlet. The liquid inlet is connected to the liquid cooling pipe 22 through the liquid inlet pipe, and the liquid outlet is connected to the liquid cooling pipe 22 through the liquid outlet pipe. The setting of the liquid cooling pipe 22 accelerates the cooling of the injection molded parts in the injection mold.

[0035] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An injection mold, characterized in that: The device includes an upper mold assembly and a lower mold assembly. The upper mold assembly includes an upper top plate and an upper mold frame fixedly connected to the upper top plate. The upper mold frame has an upper mounting groove on the side away from the upper top plate. An upper mold core is provided in the upper mounting groove. An injection tube is slidably provided on the upper top plate, the upper mold frame and the upper mold core. The lower mold assembly includes a lower base plate and support blocks fixed on both sides of the lower base plate. A lower mold frame is provided on the side of the two support blocks away from the lower base plate. An ejector plate assembly, an ejector rod assembly, a guide rod assembly, a support rod assembly, and a reset assembly are provided between the lower mold frame and the lower base plate. A lower mounting groove is provided on the side of the lower mold frame away from the lower base plate. A lower mold core is provided in the lower mounting groove. An injection cavity is formed between the upper mold core and the lower mold core. The ejector assembly includes multiple round ejector rods and multiple angled ejector rod assemblies. One end of the round ejector rod is fixedly connected to the ejector plate assembly, and the other end passes through the lower mold frame and the lower mold core. The angled ejector rod assembly and the lower mold core form an injection cavity.

2. The injection mold according to claim 1, characterized in that, The inclined ejector assembly includes a slide groove fixed to the ejector plate assembly. A first inclined ejector and a second inclined ejector are slidably disposed in the slide groove, passing through the lower mold frame and the lower mold core. The end of the first inclined ejector away from the slide groove extends into the space between the lower mold core and the lower mold core to form an injection cavity. An injection rod is provided near the second inclined ejector pin in the lower mold core. The end of the second inclined ejector pin away from the slide groove extends into the lower mold core, and an injection cavity is formed between the second inclined ejector pin, the injection rod, and the lower mold core.

3. The injection mold according to claim 1, characterized in that, The support rod assembly includes multiple support rods, one end of which is fixedly connected to the lower base plate, and the other end is fixedly connected to the bottom surface of the lower mold frame; The guide rod assembly includes a guide rod and a guide ring sleeved on the guide rod. One end of the guide rod is fixedly connected to the lower base plate, and the other end is fixedly connected to the bottom surface of the lower mold frame.

4. The injection mold according to claim 3, characterized in that, The ejector plate assembly includes an upper ejector plate and a lower ejector plate. The guide rod passes through the upper ejector plate and the lower ejector plate. The guide ring has a flange in the middle. The upper top surface of the flange abuts against the lower bottom surface of the upper ejector plate. The lower ejector plate has a flange mounting groove. The lower bottom surface of the flange abuts against the top surface of the flange mounting groove.

5. The injection mold according to claim 4, characterized in that, The reset assembly includes a reset rod and a reset spring sleeved on the reset rod. One end of the reset rod is fixedly connected to the upper ejector plate, and the other end passes through the lower mold frame. The lower bottom surface of the lower mold frame is provided with a spring mounting groove. One end of the reset spring abuts against the bottom surface of the spring mounting groove, and the other end abuts against the top surface of the upper ejector plate.

6. The injection mold according to claim 1, characterized in that, The upper mold core and the lower mold core are equipped with liquid cooling pipes. The upper mold frame and the lower mold frame are each equipped with a liquid inlet and a liquid outlet. The liquid inlet is connected to the liquid cooling pipes through a liquid inlet pipe, and the liquid outlet is connected to the liquid cooling pipes through a liquid outlet pipe.

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