Ultrasonic shearing machine for injection products

Abstract

The utility model discloses an ultrasonic shearing machine for injection molding products, relates to the technical field of vehicle logo processing, and solves the problems that the manual shearing efficiency is low and errors are easy to occur during vehicle logo plastic molding. The device comprises a positioning jig, the positioning jig is provided with a positioning groove matched with a to-be-sheared product in shape, and at least one through hole facilitating material leakage is formed in the middle of the positioning groove; an ultrasonic generator; the pressing die is located over the positioning jig and detachably installed at the bottom of the ultrasonic generator, the pressing die can move downwards to press a product to be sheared into the positioning groove, the ultrasonic generator can emit sound waves with the frequency consistent with that of a pressing die body, and the pressing die can press the product to be sheared into the positioning groove. And the joint of the injection molding product and the injection molding part can be broken under the action of resonance. The ultrasonic shearing machine can automatically shear off vehicle logos from injection molding parts, the problem that errors are likely to occur due to manual shearing is avoided, and the yield is greatly increased.

Description

Technical Field

[0001] This utility model relates to the field of vehicle logo processing technology, and in particular to an ultrasonic shearing machine for injection molded products. Background Technology

[0002] Currently, all car logos are injection molded. A cavity is formed between the upper and lower mold cores. Molded liquid is injected into the cavity through runners within the mold. After the molten liquid solidifies, a molded part is obtained. This part is formed by the co-solidification of the runners and the molten liquid within the cavity, causing the logo to adhere to the molded part. Therefore, the logo needs to be cut off the molded part. This step is usually done manually, which is slow, prone to errors, results in a high scrap rate, and reduces overall processing efficiency. Utility Model Content

[0003] The purpose of this invention is to solve the above-mentioned problems by designing an ultrasonic shearing machine for injection molded products, which solves the problems of low efficiency and easy error in manual shearing during injection molding.

[0004] The technical solution of this utility model to achieve the above objectives is an ultrasonic shearing machine for injection molded products, used to cut injection molded products off injection molded parts, wherein the connection between the injection molded product and the injection molded part has the lowest strength, comprising:

[0005] A positioning fixture having a positioning groove whose shape is adapted to the shape of the product to be cut, and at least one through hole in the middle of the positioning groove to facilitate material leakage.

[0006] An ultrasonic generator is used to emit ultrasonic waves of a specific frequency.

[0007] The pressing mold is located directly above the positioning fixture and is detachably mounted on the bottom of the ultrasonic generator. The pressing mold can move down to press the product to be cut into the positioning groove. The ultrasonic generator can emit sound waves with the same frequency as the pressing mold body. Under the action of resonance, the connection between the injection molded product and the injection molded part can break.

[0008] Preferred options also include:

[0009] Base;

[0010] A lifting mechanism is used to drive the ultrasonic generator to move up and down;

[0011] A support frame having a material discharge port, and a positioning fixture mounted on the support frame and positioned above the material discharge port.

[0012] Preferably, a conveyor belt is provided below the support, and the conveyor belt passes under the through hole on the support.

[0013] Preferably, the positioning groove has a support portion for supporting the connection between the injection molded part and the injection molded product.

[0014] Preferably, the support portion has undergone hardening and reinforcement treatment.

[0015] Preferably, the bottom of the pressing mold is provided with a pressing block, which corresponds to the support portion.

[0016] Preferably, the bottom of the pressure block is formed with a groove, the shape of which is adapted to the shape of the connection between the injection molded part and the injection molded product.

[0017] Its advantages over existing technologies are:

[0018] In this invention, the downward movement of the lower pressure mold can press the injection molded part into the positioning groove on the positioning fixture below. The ultrasonic generator can emit sound waves that are consistent with the natural frequency of the lower pressure mold, thereby generating resonance. Since the connection between the car logo and the injection molded part has the lowest strength, the connection between the car logo and the injection molded part will break first due to the resonance, thus cutting the car logo off the injection molded part. This avoids the problem of errors that are easy to occur when cutting manually, and the yield rate is greatly improved. Moreover, the cutting time can be shortened to a fraction of a second by this ultrasonic shearing machine, which greatly improves the cutting efficiency of the injection molded part and improves the overall processing efficiency of the car logo. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the ultrasonic shearing machine in this utility model;

[0020] Figure 2 This is a schematic diagram of the positioning fixture mounted on the bracket;

[0021] Figure 3 This is a schematic diagram of the positioning fixture;

[0022] Figure 4 This is a schematic diagram of the lower pressure die;

[0023] Figure 5 This is a structural diagram of the injection-molded part and the car logo.

[0024] In the diagram, 1 is an ultrasonic generator; 2 is a pressing mold; 21 is a pressing block; 211 is a groove; 3 is a positioning fixture; 301 is a through hole; 302 is a support part; 4 is a base; 5 is a bracket; 6 is a lifting mechanism; 7 is a conveyor belt; 8 is an injection molded part; and 9 is a car logo. Detailed Implementation

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] As Figure 1 shown, a preferred embodiment of the present utility model provides an ultrasonic shearing machine for injection molded products, which is used to cut the vehicle logo 9 from the injection molded part 8.

[0027] As Figure 5 shown, in order to improve production efficiency, two vehicle logos 9 are formed on one injection molded part 8, so that the shape of the entire injection molded part 8 is similar to the shape of "mu". The vehicle logo 9 is located in the middle of the two "kou" characters. There is at least one connection point between the vehicle logo 9 and the injection molded part 8. In order to facilitate shearing, the connection point between the vehicle logo 9 and the injection molded part 8 is narrowed. The thickness of the connection point is usually about 0.4 - 0.6 mm, so the connection strength is reduced. When using ultrasonic resonance shearing, this position is most likely to break.

[0028] The connection point between the vehicle logo 9 and the injection molded part 8 becomes smaller, making the channel between the runner and the cavity in the mold smaller. Therefore, in order to quickly injection mold, there are two connection points between the vehicle logo 9 and the injection molded part 8 in this embodiment, and injection is carried out into the cavity simultaneously from the channels corresponding to these two connection points during injection molding.

[0029] The following details the specific structure of the ultrasonic shearing machine.

[0030] Refer to Figure 1 、 Figure 2 , the ultrasonic shearing machine mainly includes a base 4, a lifting mechanism 6, an ultrasonic generator 1, a lower pressing mold 2, a positioning fixture 3, etc. A bracket 5 is installed on the base 4, and the positioning fixture 3 is fixedly installed on the bracket 5 through screws. The positioning fixture 3 is used to position the injection molded part 8.

[0031] Refer to Figure 3 , a positioning groove is opened on the positioning fixture 3. The shape of the positioning groove is adapted to the shape of the injection molded part 8, and the positioning groove can position the periphery and the middle of the injection molded part 8. There are two through holes 301 in the positioning groove, and the positions of the two through holes 301 correspond to the positions of the two vehicle logos 9 on the positioning part, so that the vehicle logos 9 can fall after being cut.

[0032] Since the car logo 9 and the injection molded part 8 have two connection points, there are four support parts 302 in the positioning groove. The upper surface of these four support parts 302 is flat, and they correspond to the two car logos 9 on the injection molded part 8, respectively. The support parts 302 are hardened and reinforced, so they will not deform. When the lower mold 2 presses the injection molded part 8 into the positioning groove, the support parts 302 are subjected to the greatest force.

[0033] like Figure 1 As shown, the lifting mechanism 6 is fixedly mounted on the base 4 and is used to control the up and down movement of the pressing mold 2 and the ultrasonic generator 1. This lifting mechanism 6 can be a conventional lifting mechanism 6, and the specific connection structure between it and the ultrasonic generator 1 is also a conventional mechanism, which is not the focus of this embodiment and will not be described in detail here.

[0034] The pressing mold 2 is installed at the bottom of and connected to the ultrasonic generator 1. The pressing mold 2 is detachable, and different pressing molds 2 need to be replaced depending on the product. The ultrasonic generator 1 can emit ultrasonic waves, and the frequency of the ultrasonic waves is consistent with the natural frequency of the pressing mold 2.

[0035] like Figure 4 As shown, four pressure blocks 21 are also installed at the bottom of the lower mold 2. The four pressure blocks 21 correspond to the four support parts 302 in the positioning fixture 3 below. Each pressure block 21 has a groove 211 at the bottom. The shape of the groove 211 is adapted to the shape of the connection between the car logo 9 and the injection molded part 8, and is used to position the connection part.

[0036] After the injection molded part 8 is positioned in the positioning groove on the positioning fixture 3, the lifting mechanism 6 controls the lowering mold 2 to move downward, pressing the injection molded part 8 firmly into the positioning groove. Then, the ultrasonic generator 1 emits ultrasonic waves that match the natural frequency of the lowering mold 2, generating resonance. Utilizing the resonance, the connection between the car emblem 9 and the injection molded part 8 will break first, and the car emblem 9 can usually be cut off from the injection molded part 8 within a fraction of a second.

[0037] There is a material drop hole in the middle of the bracket 5. The positioning fixture 3 is located above the material drop hole. The car logo 9 cut from the injection molded part 8 will automatically fall into the material drop hole through the through hole 301 on the positioning fixture 3.

[0038] like Figure 1 As shown, a conveyor belt 7 is also provided below the support 5. The conveyor belt 7 passes under the support 5 and passes under the material drop port. The car logo 9 that is put into the material drop port will eventually fall onto the conveyor belt 7 and be conveyed out by the conveyor belt 7.

[0039] A protective layer (not shown in the figure) is attached along the inner wall of the through hole 301 on the positioning fixture 3 and the inner wall of the material drop port on the bracket 5 to protect the car logo 9 and prevent the car logo 9 from scratching the inner wall and affecting the appearance.

[0040] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. An ultrasonic shearing machine for injection molded products, used to cut injection molded products off injection molded parts (8), wherein the connection between the injection molded product and the injection molded part (8) has the lowest strength, characterized in that, include: The positioning fixture (3) has a positioning groove whose shape is adapted to the shape of the product to be cut, and the positioning groove has at least one through hole (301) in the middle to facilitate material leakage. An ultrasonic generator (1) is used to emit ultrasonic waves; The pressing mold (2) is located directly above the positioning fixture (3) and is detachably installed at the bottom of the ultrasonic generator (1). The pressing mold (2) can move down to press the product to be cut into the positioning groove. The ultrasonic generator (1) can emit sound waves with the same frequency as the pressing mold (2) body. Under the action of resonance, the connection between the injection molded product and the injection molded part (8) can break.

2. The ultrasonic shearing machine for injection molded products according to claim 1, characterized in that, Also includes: Base (4); The lifting mechanism (6) is used to drive the ultrasonic generator (1) to move up and down; The bracket (5) has a material discharge port, and the positioning fixture (3) is mounted on the bracket (5) and located above the material discharge port.

3. The ultrasonic shearing machine for injection molded products according to claim 2, characterized in that, A conveyor belt (7) is provided below the support (5), and the conveyor belt (7) passes under the through hole (301) on the support (5).

4. The ultrasonic shearing machine for injection molded products according to claim 1, characterized in that, The positioning groove has a support part (302) for supporting the connection between the injection molded part (8) and the injection molded product.

5. An ultrasonic shearing machine for injection molded products according to claim 4, characterized in that, The support part (302) has been hardened and reinforced.

6. An ultrasonic shearing machine for injection molded products according to claim 4, characterized in that, The bottom of the pressing mold (2) is provided with a pressing block (21), which corresponds to the support part.

7. An ultrasonic shearing machine for injection molded products according to claim 6, characterized in that, The bottom of the pressure block (21) has a groove (211) which is adapted to the shape of the connection between the injection molded part (8) and the injection molded product.

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