Hot melt knife device

Abstract

The utility model discloses a hot melt cutter device, bottom plate, install in the hot melt cutter subassembly one of bottom plate, install in the jig assembly for placing injection molding product of bottom plate, cutter subassembly two and cylinder assembly, bottom plate is equipped with a plurality of guide pillar who penetrates cutter subassembly two and cylinder assembly, is used for the cutter of cylinder assembly drive cutter subassembly two along the guide column guide movement, with the tangent of hot melt cutter of hot melt cutter subassembly one, cut the product of injection molding product of jig assembly. The cutter of cutter subassembly two and the tangent of hot melt cutter of hot melt cutter subassembly one of the present application, compared with traditional manual shearing or mechanical cutting, on the basis of the previous manual shearing or mechanical shearing, heat hot melt cutter, increase hot melt cutter cutting temperature, cut better to shearing part, avoid the problem such as the crack of product shearing part incision, incision whitening, burn, incision residual too long, improve the yield of product.

Description

Technical Field

[0001] This invention relates to the field of post-processing equipment for injection molded products, and in particular to a hot melt cutter device for shearing the gate of injection molded products. Background Technology

[0002] Injection molding, as one of the core processes in plastic product manufacturing, is widely used in the automotive, electronics, home appliance, medical, and packaging industries. The gate, as the channel through which molten plastic enters the mold cavity, directly affects the product's appearance, dimensional stability, and subsequent assembly performance. Traditional gate separation methods mainly include: manual shearing: using scissors, diagonal pliers, or blades to manually remove the gate; and mechanical cutting: using simple cutters, punching, or in-mold punching.

[0003] In the process of developing the existing technology, the inventors discovered that: For injection molding materials such as PMMA, glass fiber reinforced nylon, POM, and PVC, problems such as cut cracking, whitening of the cut, burning, and excessively long cut residue may occur during the process of removing the gate by manual shearing or mechanical cutting, resulting in low yield.

[0004] Therefore, this application provides a technical solution for removing injection-molded materials with a high yield rate to solve the problems of low yield rate caused by manual shearing or mechanical cutting in the prior art, such as cracking of the cut, whitening of the cut, burning, and excessively long cut residue. Utility Model Content

[0005] This utility model provides a technical solution for cutting injection molded materials with a high yield rate to solve the problems of cracking, whitening, burning, and excessively long cut residue that occur during manual or mechanical cutting in the prior art, resulting in a low yield rate.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A hot melt cutting device is provided, comprising: a base plate, a first hot melt cutting assembly mounted on the base plate, a fixture assembly for placing injection molded products mounted on the base plate, a second cutting assembly, and a cylinder assembly. The fixture assembly is located between the first hot melt cutting assembly and the second cutting assembly. The base plate is equipped with a plurality of guide posts that penetrate the second cutting assembly and the cylinder assembly. The cylinder assembly drives the cutting blade of the second cutting assembly to move along the guide posts and tangent to the hot melt cutting blade of the first hot melt cutting assembly, thereby cutting off the injection molded product placed on the fixture assembly.

[0007] In a preferred embodiment of the present invention, the hot melt cutter assembly includes: a hot melt cutter base plate mounted on the base plate; a plurality of hot melt cutter units mounted on the hot melt cutter base plate; each hot melt cutter unit includes at least a hot melt cutter and a hot melt clamp for fixing the hot melt cutter.

[0008] In a preferred embodiment of this utility model, the fixture assembly includes: a fixture with an injection groove for placing injection molded products; a second base plate installed between the base plate and the first hot melt cutter base plate; and a plurality of elastic guide post assemblies installed on the second base plate and surrounding the first hot melt cutter base plate for connecting the fixture and the second base plate; the fixture has connecting holes corresponding to the elastic guide post assemblies, and the fixture and the elastic guide post assemblies are movably connected; the elastic guide post assembly includes a guide post, a connecting piece sleeved on the guide post for connecting the fixture, and a spring sleeved on the guide post and located between the connecting piece and the second base plate.

[0009] In a preferred embodiment of the present invention, the second cutting blade assembly includes a cutting blade plate and a plurality of cutting blade units mounted on the cutting blade plate, wherein the plurality of cutting blade units correspond in position to the plurality of hot melt cutting blade units.

[0010] In a preferred embodiment of the present invention, the cylinder assembly includes a first cylinder assembly and a second cylinder assembly. The first cylinder assembly includes a first plate and a first cylinder mounted on the first plate. The second cylinder assembly includes a second plate and a second cylinder mounted on the second plate. The first plate faces away from the end face of the first cylinder and the second plate faces away from the end face of the second cylinder, and a floating joint connecting the first cylinder and the second cylinder is provided.

[0011] In a preferred embodiment of the present invention, the cutting plate has a through hole at the guide post position, and a guide sleeve is installed between the guide post and the through hole.

[0012] In a preferred embodiment of the present invention, the second plate is provided with a through hole II at the guide post position, and a guide sleeve is installed between the guide post and the through hole II.

[0013] In a preferred embodiment of the present invention, the fixture has a through groove at the position where the injection molded product is placed for the product to fall; inclined plates are connected to both sides of the fixture, and a collection frame is provided on the bottom plate at the position corresponding to the inclined plate, so that after the product is cut off, it slides down the inclined plate to the collection frame.

[0014] In a preferred embodiment of the present invention, a hydraulic buffer device is further included, which is installed between the base plate and the cutting plate.

[0015] The hot melt cutting device provided in this application has the following advantages: The cutting blade of the second cutting blade assembly in this application is tangential to the hot melt cutting blade of the first hot melt cutting blade assembly. Compared to traditional manual or mechanical cutting, this method, by heating the hot melt cutting blade and increasing its cutting temperature, better cuts the area being cut, avoiding problems such as cracking, whitening, burning, and excessively long cut edges, thus improving product yield. Furthermore, the hot melt temperature of the hot melt cutting blade is adjustable, allowing for adjustments based on different injection molded parts. In addition, the fixture assembly can be adjusted according to the injection molded product, and the positions of the first and second hot melt cutting blade assemblies can also be adjusted to achieve cutting of different product gates. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a practical hot melt cutting device; Figure 2 This is a schematic diagram of the first component of this practical hot melt cutter assembly; Figure 3 This is a schematic diagram of this practical jig; Figure 4 This is a schematic diagram of the components of this practical jig; Figure 5 This is a schematic diagram showing the relationship between the injection molded part and the hot melt cutter and the cutter. Figure 6 This is a schematic diagram of the second component of this practical cutting tool; Figure 7 This is a schematic diagram of a practical cylinder assembly; The components in the attached diagram are labeled as follows: Hot melt cutting device-10; Base plate -1; Hot melt cutter assembly 1-2; Hot melt cutter base plate 1-21; Hot melt cutter unit-22; Hot melt cutter-221; Hot melt clamp-222; Fixture assembly-3; Fixture-31; Injection tank-311; Through groove-312; Connecting hole-313; Inclined plate-32; Collection frame-33; Base plate II-34; Elastic guide post assembly-35; Guide post-351; Connecting piece-352; Spring-353; Cutter assembly 2-4; Cutter plate-41; Through hole 1-411; Guide sleeve-412; Cutter unit-42; Cutter-421; Cutter fixture-422; Cylinder assembly-5; First cylinder assembly-51; First plate-511; First cylinder-512; Second cylinder assembly-52; Second plate-521; Second cylinder-522; Through hole two-523; Floating joint-53; Guide post-7; Hydraulic buffer device-8; Injection Molded Parts - 10. Detailed Implementation

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0018] Please see Figure 1 This application provides a hot melt cutting device 10, including: a base plate 1, a hot melt cutting assembly 2 mounted on the base plate 1, a fixture assembly 3 for placing injection molded products 10 mounted on the base plate 1, a cutting assembly 4, and a cylinder assembly 5. The fixture assembly 3 is located between the hot melt cutting assembly 2 and the cutting assembly 4. The base plate 1 is equipped with a plurality of guide posts 7 that penetrate the cutting assembly 4 and the cylinder assembly 5. The cylinder assembly 5 drives the cutting blade 421 of the cutting assembly 4 to move along the guide posts 7 and tangent to the hot melt cutting blade 221 of the hot melt cutting assembly 2, cutting off the injection molded product 10 placed on the fixture assembly 3.

[0019] Specifically, the base plate 1 mainly supports the hot melt cutter assembly 2, the fixture assembly 3, the cutter assembly 4, and the cylinder assembly 5. The fixture assembly 3 is mainly used to place the injection molded product 10. The hot melt cutter assembly 2 is mainly based on the original cutter, but heats the hot melt cutter to increase its cutting temperature, so that the heated cutter can cut into the cutter 421 of the cutter assembly 4, thereby better cutting off the injection molded product 10 located between the hot melt cutter assembly 2 and the cutter assembly 4. The cylinder assembly 5 is mainly used to guide the cutter 421 of the cutter assembly 4 along the guide post 7, so that it can contact and cut into the hot melt cutter assembly 2.

[0020] Please see Figure 2 The hot melt cutter assembly 2 includes: a hot melt cutter base plate 21 mounted on the base plate 1; a plurality of hot melt cutter units 22 mounted on the hot melt cutter base plate 21; the hot melt cutter unit 22 includes at least a hot melt cutter 221 and a hot melt clamp 222 for fixing the hot melt cutter 221.

[0021] Specifically, the hot melt cutter base plate 21 is installed in the middle of the base plate 1, and the hot melt cutter unit 22 is installed on the hot melt cutter base plate 21, including a hot melt clamp 222 installed on the hot melt cutter base plate 21 and a hot melt cutter 221 fixed to the hot melt clamp 222. It should also be noted that the hot melt cutter 221 refers to the hot melt cutter 221 reaching a predetermined hot melt temperature through an electrically auxiliary heating device installed in the hot melt clamp. Specifically, the electrically auxiliary heating device can mainly be a heating wire. After being energized, the heating wire conducts heat to the hot melt cutter connected to it, thereby increasing the temperature of the hot melt cutter. This allows the hot melt cutter 221 to tangent with the cutter 421 of the cutter assembly 4, thus better cutting the injection molded product.

[0022] Please see Figure 6 The second cutting blade assembly 4 includes a cutting blade plate 41 and a plurality of cutting blade units 42 mounted on the cutting blade plate 41, the plurality of cutting blade units 42 corresponding to the plurality of hot melt cutting blade units 22. Specifically, the cutting blade unit 42 includes a cutting blade clamp 422 fixed to the cutting blade plate 41 and a cutting blade 421 fixed to the cutting blade clamp 422.

[0023] Furthermore, the cutter plate 41 has a through hole 411 at the guide post 7, and a guide sleeve 412 is installed between the guide post 7 and the through hole 411 to better realize movement along the guide post 7.

[0024] Please see Figure 7 The cylinder assembly 5 includes a first cylinder assembly 51 and a second cylinder assembly 52. ​​The first cylinder assembly 51 includes a first plate 511 and a first cylinder 512 mounted on the first plate 511. The second cylinder assembly 52 includes a second plate 521 and a second cylinder 522 mounted on the second plate 521. The end face of the first plate 511 facing away from the end face of the first cylinder 512 and the end face of the second plate 521 facing away from the end face of the second cylinder 522 are opposite to each other, and a floating joint 53 is provided to connect the first cylinder 512 and the second cylinder 522.

[0025] Specifically, the base plate 1 is equipped with several guide posts 7 that penetrate the second cutter assembly 4 and the cylinder assembly 5. That is, when the cylinder assembly 5 drives the second cutter assembly to move, it moves along the guide post 7. Furthermore, the cylinder assembly 5 is mainly used to drive the second cutter assembly 4 towards the position of the first hot melt cutter assembly 2, so as to cut the injection molded part 10 located between the first hot melt cutter assembly 2 and the second cutter assembly 4. The floating joint 53 is mainly used to adjust the balance of the second plate 521, preventing the second cylinder assembly 52 from being jammed by the guide posts 7 during its up-and-down movement.

[0026] Furthermore, the second plate 521 has through holes 523 at the guide post 7, and a guide sleeve 412 is installed between the guide post 7 and the through hole 523 to better realize movement along the guide post 7.

[0027] Please see Figures 3 to 4The fixture assembly 3 includes: a fixture 31 with an injection groove 311 for placing the injection molded part 10; a second base plate 34 installed between the base plate 1 and the hot melt cutter base plate 21; and a plurality of elastic guide post assemblies 35 installed on the second base plate 34 and surrounding the hot melt cutter base plate 21 for connecting the fixture 31 and the second base plate 34; the fixture 31 has connecting holes 313 corresponding to the elastic guide post assemblies 35, and the fixture 31 and the elastic guide post assemblies 35 are movably connected; the elastic guide post assembly 35 includes a guide post 351, a connecting piece 352 sleeved on the guide post 351 for connecting the fixture 31, and a spring sleeved on the guide post 351 and located between the connecting piece 352 and the second base plate 34.

[0028] Specifically, in one practical application scenario provided in this application, both the second base plate 34 and the hot melt cutter base plate 21 are mounted on the first base plate 1. The second base plate 34 is mounted on the first base plate 1, and the hot melt cutter base plate 21 is mounted on the second base plate 34. The end face of the second base plate 34 is larger than the end face of the first hot melt cutter base plate 21. Several elastic guide post assemblies 35 surround the first hot melt cutter base plate 21 and are connected to the second base plate 34. The fixture 31 is supported by the elastic guide post assemblies 35. A spring (not shown in the figure) is provided between the connecting piece 352 and the second base plate 34 in the elastic guide post assembly 35. Please refer to [link to relevant documentation] for further information. Figure 5 The first cylinder 512 drives the cutter of the second cutter assembly 4 to move to the upper end face of the injection molded part 10 of the fixture assembly 3. The hot melt cutter of the first hot melt cutter assembly 2 contacts the lower end face of the injection molded part 10 of the fixture assembly 3. Then, the second cutter assembly 4 is subjected to the force of the second cylinder and moves downward again. The injection molded part 10 and the fixture 31 are subjected to the force and move downward. Then, the second cutter assembly 4 and the first hot melt cutter assembly 2 are tangent to cut off the injection molded part 10.

[0029] Furthermore, the fixture 31 has a through groove 312 at the product position where the injection molded product 10 is placed, for the product to fall; inclined plates 32 are connected to both sides of the fixture 31, and a collection frame 33 is provided on the bottom plate 1 at the position corresponding to the inclined plate 32, for the product to slide down through the inclined plate 32 to the collection frame 33 after being cut off.

[0030] Specifically, the injection molded part 10 is generally placed in the injection groove 311 of the fixture 31. A through groove 312 is opened on the product position fixture 31 for shearing and dropping. The inclined plate 32 is mainly used for the product to slide down and then be collected by the collection box 33.

[0031] Furthermore, it also includes a hydraulic buffer device 8 installed between the base plate 1 and the cutting plate 41. Specifically, there are at least two hydraulic buffer devices 8, which are fixed on both sides of the base plate 1. When the cutting plate 41 moves downward, the hydraulic buffer column can be slowly released downward under the action of hydraulic pressure, so that the cutting plate 41 moves downward slowly, and finally the cutter 421 moves downward slowly; this avoids damage to the injection molded product 10 due to excessively fast movement speed.

[0032] In one practical application scenario provided in this application, the first cylinder 512 of the first cylinder assembly 51 and the second cylinder 522 of the second cylinder assembly 52 are both in the retracted (origin) state. The robotic arm places the injection molded part 10 into the injection groove 311 of the fixture 31. The first cylinder 512 actuates, pushing the second cylinder assembly 52 and the second cutter assembly 4 downwards. The cutter 421 of the second cutter assembly 4 abuts against the upper end face of the injection molded part 10 in the fixture 31. The fixture 31 is subjected to a downward force from the injection molded part 10, the spring of the elastic guide post assembly 35 is compressed, and the injection molded part 10 and the fixture 31 move downwards a certain distance. At the same time, the lower hot melt cutter 221 in the hot melt cutter assembly 2 pushes upwards against the lower end face of the injection molded part 10. Simultaneously, the heads of the two hydraulic buffer columns contact the lower end face of the upper cutter plate. After a set preheating time, the hot melt cutter 221 at the contact point with the injection molded part is activated by the second cylinder 522 in the second cylinder assembly 52, pushing the cutter assembly 421 downwards again. The cutter 421 stops moving when it reaches the elastic limit of the two hydraulic buffer devices 8. Simultaneously, the cutter 421 and the hot melt cutter 221 shear vertically, cutting off the injection molded part 10. The fixture 31 returns to its origin under the restoring force of the spring in the elastic guide post assembly 35, and the product falls down the inclined plate 32 into the collection frame 33. The first cylinder 512 and the second cylinder 522 retract, and the first cylinder assembly 51 and the second cylinder assembly 52 return to their origin. Simultaneously, the two hydraulic buffer posts also return to their origin. The robotic arm removes the gate waste placed in the injection tank 311 of the fixture 31. The next round of operation begins.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A hot-melt cutting device, characterized in that, include: The base plate includes a first hot melt cutter assembly mounted on the base plate, a fixture assembly for placing injection molded products mounted on the base plate, a second cutter assembly, and a cylinder assembly. The fixture assembly is located between the first hot melt cutter assembly and the second cutter assembly. The base plate is equipped with several guide posts that penetrate the second cutter assembly and the cylinder assembly. The cylinder assembly drives the cutter of the second cutter assembly to move along the guide posts and tangent to the hot melt cutter of the first hot melt cutter assembly, cutting off the injection molded product placed in the fixture assembly.

2. The hot melt cutting device according to claim 1, characterized in that, The hot melt cutting blade assembly includes: A hot melt cutting blade base plate is installed on the base plate; A plurality of hot melt cutting blade units are installed on the hot melt cutting blade base plate 1; The hot melt cutter unit includes at least a hot melt cutter and a hot melt clamp for fixing the hot melt cutter.

3. The hot melt cutting device according to claim 2, characterized in that, The fixture assembly includes: A fixture is provided with an injection tank for placing injection molded parts; A second base plate is installed between the base plate and the hot melt cutter base plate one; A plurality of elastic guide post assemblies, which are installed on the second base plate and surround the first hot melt cutter base plate, for connecting the fixture and the second base plate; The fixture has a connection hole for the elastic guide post assembly, and the fixture and the elastic guide post assembly are movably connected; The elastic guide post assembly includes a guide post, a connecting piece sleeved on the guide post for connecting a fixture, and a spring sleeved on the guide post and located between the connecting piece and the base plate.

4. The hot melt cutting device according to claim 2, characterized in that, The second cutting blade assembly includes a cutting blade plate and a plurality of cutting blade units mounted on the cutting blade plate, the plurality of cutting blade units corresponding to the plurality of hot melt cutting blade units.

5. The hot melt cutting device according to claim 1, characterized in that, The cylinder assembly includes a first cylinder assembly and a second cylinder assembly. The first cylinder assembly includes a first plate and a first cylinder mounted on the first plate. The second cylinder assembly includes a second plate and a second cylinder mounted on the second plate. The first plate faces away from the end face of the first cylinder and the second plate faces away from the end face of the second cylinder. A floating joint is provided to connect the first cylinder and the second cylinder.

6. The hot melt cutting device according to claim 4, characterized in that, The cutting blade has a through hole at the guide post position, and a guide sleeve is installed between the guide post and the through hole.

7. The hot melt cutting device according to claim 5, characterized in that, The second plate has through holes two at the guide post positions, and a guide sleeve is installed between the guide post and the through hole two.

8. The hot melt cutting device according to claim 3, characterized in that, The fixture has a through groove at the product placement position for the injection molded part to allow the product to fall; inclined plates are connected to both sides of the fixture, and a collection frame is provided on the bottom plate at the position corresponding to the inclined plate, so that after the product is cut off, it slides down the inclined plate to the collection frame.

9. The hot melt cutting device according to claim 4, characterized in that, It also includes a hydraulic buffer device installed between the base plate and the cutter plate.

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