In-mold hot cutting device for injection molding machine

Abstract

This utility model provides an in-mold hot-cutting device for injection molding machines, including a fixed mounting plate and an injection mounting plate. The fixed mounting plate is connected to a mold parting assembly and has a push groove. The mold parting assembly is connected to a mold component, which includes a mold assembly and an injection assembly. The injection assembly includes an injection mounting plate, which is rotatably connected to an injection mold plate. A hot-cutting lever is inserted into the side of the injection mounting plate. By causing the injection mounting plate and the injection mold plate to rotate relative to each other, the injection gate is cut off, realizing in-mold hot-cutting technology. This separates the injection-molded model from the injection runner. The central mold parting rod can push out the injection runner, and the mold parting push rod can push out the injection-molded product. This reduces the steps required to separate the runner after injection molding, simplifies the workflow, improves injection efficiency, does not affect the product appearance quality, and significantly reduces the product scrap rate.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment for injection molding machine molds, specifically, to an in-mold heat cutting device for injection molding machines. Background Technology

[0002] Molds are various molds and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting or forging, smelting, and stamping. In short, molds are tools used to make shaped objects. These tools are composed of various parts, and different molds are composed of different parts. They mainly achieve the processing of the shape of the object by changing the physical state of the material being molded.

[0003] Modern injection molding processes place increasingly higher demands on production efficiency and product appearance, requiring both improved production efficiency and guaranteed product quality. This necessitates automated mold production, where the product automatically separates from the runner upon mold opening and ejection. Many products, due to structural and aesthetic requirements, utilize side-gate injection. With side-gate injection, the product and runner cannot separate upon mold opening and ejection; they are connected via the gate. Secondary processing is required to separate the product from the runner, necessitating worker trimming of the gate. This labor-intensive process significantly reduces efficiency and results in residue or insufficient material at the separation point. Unattractive gate trimming also negatively impacts product appearance and increases scrap rates. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the above-mentioned traditional technology and provide an in-mold heat cutting device for injection molding machines that can facilitate the separation of injection molded parts from injection runners.

[0005] The objective of this utility model is achieved through the following technical measures: An in-mold hot-cutting device for an injection molding machine, characterized in that: it includes a fixed mounting plate and an injection mounting plate, the fixed mounting plate is fixedly connected to two fixed support plates, and a mold parting assembly is connected to the other side of the two fixed support plates. The fixed mounting plate has a pushing groove. The mold parting assembly includes a mold mounting plate, and a mold component is connected to the surface of the mold mounting plate. The mold component includes a mold assembly and an injection assembly. The mold assembly includes an injection template, and the side of the injection template has a spring placement groove and a lever swing groove. A return spring is sleeved in the spring placement groove. The injection assembly includes an injection mounting plate, which is rotatably connected to the injection template. The side of the injection mounting plate has a lever slot, and a hot-cutting lever is inserted into the lever slot. The hot-cutting lever passes through the lever swing groove and its side contacts one end of the return spring. An injection top plate is fixedly connected to the injection mounting plate, and the injection top plate contacts the surface of the injection template.

[0006] As an improvement: the injection molding mounting plate has a central parting hole, and the surface of the injection molding mounting plate has multiple injection channels. The multiple injection channels are arranged in a circle with equal included angles around the central parting hole. One end of each of the multiple injection channels is connected to the central parting hole, and the other end of each of the multiple injection channels has an injection gate groove.

[0007] As an improvement: the injection mold template has multiple injection mold slots, and each of the multiple injection mold slots has injection sprue holes on its side. The injection sprue holes are arranged opposite to the array of sprue slots. Each of the multiple injection mold slots has multiple mold parting holes, which penetrate the injection mold template. The injection mold template also has multiple mold limiting holes, which all penetrate the injection mold template.

[0008] As an improvement: the mold mounting plate is provided with multiple push rod holes and multiple slide rod holes, the multiple push rod holes are corresponding to the mold parting holes, and the multiple slide rod holes are corresponding to the mold limiting holes.

[0009] As an improvement: a mold-parting push plate is slidably connected between the two fixed support plates, a mold-parting mounting plate is fixedly connected to the mold-parting push plate, a central mold-parting rod is fixedly connected to the mold-parting mounting plate, and the central mold-parting rod is correspondingly set with the central mold-parting hole.

[0010] As an improvement: multiple mold-separating push rods are fixedly connected to the mold-separating mounting plate, and the multiple mold-separating push rods are respectively set through the push rod hole and the mold mold-separating hole. Multiple limiting slide rods are fixedly connected to the mold-separating mounting plate, and the multiple limiting slide rods are slidably connected to the mold limiting hole.

[0011] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are: By setting up an injection mounting plate and injection template, the traditional mold is changed to a split structure. The hot-cutting lever can be inserted into the lever slot, and the lever swing groove allows the hot-cutting lever to swing easily. The set return spring can reset the hot-cutting lever, thereby resetting the rotated injection mounting plate. The set injection gate hole and injection gate groove can cut off the injection gate when the injection mounting plate and injection template rotate relative to each other, thus realizing in-mold hot-cutting technology, separating the injection molded model from the injection runner. The set set parting rod can push out the injection runner, and the set parting ejector can push out the injection molded product. This reduces the steps of separating the runner after injection molding, simplifies the workflow, improves injection efficiency, does not affect the product appearance quality, and significantly reduces the product scrap rate. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is an exploded structural diagram of the present invention.

[0014] Figure 3 yes Figure 2 A three-dimensional structural diagram of the injection molding component.

[0015] Figure 4 yes Figure 2 A three-dimensional structural diagram of the mold assembly.

[0016] Figure 5 yes Figure 2 Exploded view of the split-module assembly.

[0017] In the diagram: 1. Injection mounting plate; 2. Injection top plate; 3. Mold component; 31. Injection assembly; 311. Injection mounting plate; 312. Injection runner; 313. Injection sprue groove; 314. Center parting hole; 315. Lever slot; 32. Mold assembly; 321. Injection template; 322. Injection mold groove; 323. Injection sprue hole; 324. Mold parting hole; 325. Mold limiting hole; 326. Spring placement groove; 327. Lever swing groove; 33. Hot-cut lever; 34. Return spring; 4. Fixed mounting plate; 5. Push groove; 6. Fixed support plate; 7. Parting assembly; 71. Mold mounting plate; 72. Ejector hole; 73. Slide bar hole; 74. Parting ejector plate; 75. Parting mounting plate; 76. Parting ejector; 77. Center parting rod; 78. Limiting slide bar. Detailed Implementation

[0018] Example: As attached Figures 1 to 5As shown, an in-mold heat-cutting device for an injection molding machine includes a fixed mounting plate 4 and an injection mounting plate 1. The fixed mounting plate 4 is fixedly connected to two fixed support plates 6, and a mold parting assembly 7 is connected to the other side of the two fixed support plates 6. The fixed mounting plate 4 has a pushing groove 5. The mold parting assembly 7 includes a mold mounting plate 71, and a mold component 3 is connected to the surface of the mold mounting plate 71. The mold component 3 includes a mold assembly 32 and an injection assembly 31. The mold assembly 32 includes an injection template 321, and the side of the injection template 321 has a spring placement groove 326 and a lever swing mechanism. The groove 327, the spring placement groove 326, and the return spring 34 are sleeved in the groove. The injection molding assembly 31 includes an injection molding mounting plate 311, which is rotatably connected to the injection molding template 321. The side of the injection molding mounting plate 311 is provided with a lever slot 315, and a hot-cut lever 33 is inserted into the lever slot 315. The hot-cut lever 33 is set through the lever swing groove 327. The side of the hot-cut lever 33 is in contact with one end of the return spring 34. The injection molding mounting plate 1 is fixedly connected to an injection molding top plate 2, which is in contact with the surface of the injection molding template 321.

[0019] By setting the injection mounting plate 311 and the injection template 321, the traditional mold is changed to a split structure. The hot-cutting lever 33 can be inserted into the lever slot 315, and the lever swing groove 327 can facilitate the lever swinging motion of the hot-cutting lever 33. The reset spring 34 can reset the hot-cutting lever 33, thereby resetting the rotated injection mounting plate 311. The injection gate hole 323 and the injection gate groove 313 can cut off the injection gate when the injection mounting plate 311 and the injection template 321 rotate relative to each other, thereby realizing the in-mold hot-cutting technology and separating the injection molded model from the injection runner.

[0020] The injection molding mounting plate 311 has a central parting hole 314 at its center. Multiple injection runners 312 are formed on the surface of the injection molding mounting plate 311. These multiple injection runners 312 are arranged circumferentially with equal included angles around the central parting hole 314. One end of each of the multiple injection runners 312 is connected to the central parting hole 314, and the other end of each of the multiple injection runners 312 has an injection gate groove 313. The central parting hole 314 allows the central parting rod 77 to pass through easily, thus pushing out the injection runners. The injection runners 312 can be used for the flow of molten liquid plastic, which enters the injection mold groove 322 through the injection gate groove 313.

[0021] The injection mold template 321 has multiple injection mold slots 322, and each of the multiple injection mold slots 322 has an injection sprue hole 323 on its side. The injection sprue holes 323 are arranged opposite to the injection sprue slots. Each of the multiple injection mold slots 322 has multiple mold parting holes 324, which penetrate the injection mold template 321. The injection mold template 321 also has multiple mold limiting holes 325, which penetrate the injection mold template 321. The mold parting holes 324 in the injection mold slots 322 facilitate the passage of the mold parting ejector 76, thereby achieving a better mold parting effect. The mold limiting holes 325 prevent the mold parting ejector 76 and the central mold parting rod 77 from shifting during movement.

[0022] The mold mounting plate 71 has multiple push rod holes 72 and multiple slide rod holes 73. The multiple push rod holes 72 are corresponding to the mold parting hole 324, and the multiple slide rod holes 73 are corresponding to the mold limiting hole 325. The multiple push rod holes 72 and multiple slide rod holes 73 are provided to limit the movement trajectory of the parting push rod 76 and the limiting slide rod 78.

[0023] A mold-parting push plate 74 is slidably connected between the two fixed support plates 6. A mold-parting mounting plate 75 is fixedly connected to the mold-parting push plate 74. A central mold-parting rod 77 is fixedly connected to the mold-parting mounting plate 75. The central mold-parting rod 77 is correspondingly arranged with the central mold-parting hole 314. The central mold-parting rod 77 can push out the injection-molded runner as a whole, thereby realizing the separation of the injection-molded runner.

[0024] Multiple mold-parting push rods 76 are fixedly connected to the mold-parting mounting plate 75. These push rods 76 pass through push rod holes 72 and mold parting holes 324, respectively. Multiple limiting slide rods 78 are also fixedly connected to the mold-parting mounting plate 75, and these sliding slide rods 78 are slidably connected to the mold limiting holes 325. The mold-parting push rods 76 effectively separate the injection-molded workpiece, facilitating the collection of the injection-molded part. The limiting slide rods 78 limit the movement trajectory of the mold-parting assembly.

Claims

1. An in-mold heat-cutting device for an injection molding machine, characterized in that: The system includes a fixed mounting plate (4) and an injection mounting plate (1). The fixed mounting plate (4) is fixedly connected to two fixed support plates (6). A mold parting assembly (7) is connected to the other side of the two fixed support plates (6). The fixed mounting plate (4) has a push groove (5). The mold parting assembly (7) includes a mold mounting plate (71). A mold component (3) is connected to the surface of the mold mounting plate (71). The mold component (3) includes a mold assembly (32) and an injection assembly (31). The mold assembly (32) includes an injection mold template (321). The side of the injection mold template (321) has a spring placement groove (326) and a lever swing groove (327). A return spring (34) is sleeved in the spring placement groove (326). The injection molding assembly (31) includes an injection molding mounting plate (311), which is rotatably connected to the injection molding template (321). A lever slot (315) is provided on the side of the injection molding mounting plate (311), and a hot-cut lever (33) is inserted into the lever slot (315). The hot-cut lever (33) passes through the lever swing groove (327), and the side of the hot-cut lever (33) contacts one end of the return spring (34). An injection molding top plate (2) is fixedly connected to the injection molding mounting plate (1), and the injection molding top plate (2) contacts the surface of the injection molding template (321).

2. The in-mold heat-cutting device for injection molding machines according to claim 1, characterized in that: The injection molding mounting plate (311) has a central parting hole (314) in the center. The injection molding mounting plate (311) has multiple injection runners (312) on its surface. The multiple injection runners (312) are arranged in a circle with equal included angles around the central parting hole (314). One end of each of the multiple injection runners (312) is connected to the central parting hole (314). The other end of each of the multiple injection runners (312) has an injection sprue groove (313).

3. The in-mold heat-cutting device for injection molding machines according to claim 2, characterized in that: The injection molding template (321) has multiple injection mold slots (322), and each of the multiple injection mold slots (322) has an injection gate hole (323) on its side. The injection gate hole (323) is arranged opposite to the array of injection gate slots. Each of the multiple injection mold slots (322) has multiple mold parting holes (324), and the multiple mold parting holes (324) are arranged through the injection molding template (321). The injection molding template (321) has multiple mold limiting holes (325), and the multiple mold limiting holes (325) are arranged through the injection molding template (321).

4. The in-mold heat-cutting device for an injection molding machine according to claim 3, characterized in that: The mold mounting plate (71) is provided with a plurality of push rod holes (72) and a plurality of slide rod holes (73). The plurality of push rod holes (72) are corresponding to the mold parting hole (324), and the plurality of slide rod holes (73) are corresponding to the mold limiting hole (325).

5. The in-mold heat-cutting device for an injection molding machine according to claim 4, characterized in that: A mold-separating push plate (74) is slidably connected between the two fixed support plates (6). A mold-separating mounting plate (75) is fixedly connected to the mold-separating push plate (74). A central mold-separating rod (77) is fixedly connected to the mold-separating mounting plate (75). The central mold-separating rod (77) is correspondingly set with the central mold-separating hole (314).

6. The in-mold heat-cutting device for an injection molding machine according to claim 5, characterized in that: Multiple mold-separating push rods (76) are fixedly connected to the mold-separating mounting plate (75). The multiple mold-separating push rods (76) are respectively set through the push rod hole (72) and the mold mold-separating hole (324). Multiple limiting slide rods (78) are fixedly connected to the mold-separating mounting plate (75). The multiple limiting slide rods (78) are slidably connected to the mold limiting hole (325).

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