Ultrasonic welding device for welding plastic toys

Abstract

The utility model discloses an ultrasonic welding device for welding plastic toys, which belongs to the technical field of welding devices for plastic toys and comprises a seat body, an elastic supporting seat, an ultrasonic welding head, a lower mold, an upper mold and an opening and closing driving mechanism. The elastic supporting seat is arranged in the seat body, the ultrasonic welding head is arranged in the elastic supporting seat, and the lower die is arranged on the elastic supporting seat; the upper mold is relatively movably arranged on the lower mold, the opening and closing driving mechanism is arranged in the seat body, and the opening and closing driving mechanism is in driving connection with the upper mold. According to the ultrasonic welding device for welding the plastic toy, the technical problem that a mold is easily damaged due to collision when the plastic toy is welded is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of welding devices for plastic toys, and in particular to an ultrasonic welding device for welding plastic toys. Background Technology

[0002] Plastic toys are mainly made of high molecular synthetic resins, such as polyvinyl chloride and polyethylene, as the main raw materials, and then plasticizers, stabilizers and other auxiliary materials are added. The basic high molecular materials can have plasticity and fluidity under specific temperature and pressure, and can maintain a fixed shape after being molded by plastic molds.

[0003] In the production process of plastic toys, ultrasonic welding is a special processing technology that uses high-frequency mechanical vibration to join thermoplastic materials. Its core process characteristics and application points are as follows: 1. Energy conversion mechanism: It converts the power frequency current into 15-50kHz high-frequency electrical energy through an ultrasonic generator, which is then converted into mechanical vibration by a transducer. The amplitude is controlled within the range of 1-100μm, and the vibration energy is transferred to the contact surface of the workpiece by the welding head to generate frictional heat energy. 2. Delamination in the fusion stage: The welding process can be divided into four key stages: melting of the tip of the energy-conducting rib → melt spreading and contact → steady-state melting → pressure holding and cooling solidification. After the vibration stops, permanent connection is achieved through molecular bonds.

[0004] Based on this, Chinese patent document CN113510358B discloses an ultrasonic welding device, which includes an upper mold assembly and a lower mold assembly. The upper mold assembly includes an upper module and an ultrasonic welding head, with the ultrasonic welding head positioned on the side of the upper module facing the lower mold assembly. The lower mold assembly includes a lower template, which has a limiting plate for positioning the product and a pre-support member for supporting the upper module. This ultrasonic welding device, by limiting the upper module with the pre-support member, can achieve the effect of positioning the upper module, making it easier for the operator to align the ultrasonic welding head with the product. This reduces the occurrence of errors between the upper and lower mold assemblies, thereby improving welding accuracy and ultimately enhancing product quality.

[0005] However, the ultrasonic welding device disclosed above still has the technical problem of easily causing collisions and damaging the mold. Specifically, in the production process of plastic toys, the process of using ultrasonic welding to connect plastic toy parts is generally as follows: the toy parts to be welded are stacked in a special fixture to ensure precise alignment of the contact surfaces, especially the matching accuracy of the energy guiding ribs and corresponding grooves; then a pre-compression force of 0.2-0.6MPa is applied to eliminate gaps between parts and establish an energy transmission path, the pressure value is adjusted according to the elastic modulus of the material; the welding head is made to vibrate vertically at a frequency of 20 / 40kHz for 0.1-1.0 seconds, the interface temperature can reach 80%-120% of the material's melting point, and near-field welding (distance <6.4mm) is used for crystalline plastics to reduce energy loss; finally, after the vibration stops, the pressure is maintained for 0.5-3 seconds to expel excess molten material and complete molecular chain reorganization, forming a permanent weld with a strength of 70%-90% of the base material. In the aforementioned ultrasonic welding process, the two mold components that are moving relative to each other usually collide and abut each other rigidly during the mold closing action before the mold closing action is completed. Therefore, during the welding process of plastic toys, the ultrasonic mold is prone to collision and damage to the components. Utility Model Content

[0006] Therefore, it is necessary to provide an ultrasonic welding device for welding plastic toys to address the technical problem of mold collisions that easily occur during the welding of plastic toys.

[0007] An ultrasonic welding device for welding plastic toys includes: a base, an elastic support, an ultrasonic welding head, a lower mold, an upper mold, and an opening and closing drive mechanism; the elastic support is disposed in the base, the ultrasonic welding head is disposed in the elastic support, and the lower mold is disposed on the elastic support; the upper mold is movably disposed on the lower mold, and the opening and closing drive mechanism is disposed in the base and is drivenly connected to the upper mold.

[0008] Furthermore, the elastic support seat has a bottom support, a guide post connecting seat, a support frame, a guide post, a spring, and a sliding block.

[0009] Furthermore, the bottom support is disposed at the lower part of the base, and the guide post connecting seat is disposed on the bottom support; the support frame is disposed on the guide post connecting seat, the guide post connects the guide post connecting seat and the support frame respectively, the spring is connected between the guide post connecting seat and the support frame, and the spring is sleeved on the guide post.

[0010] Furthermore, the ultrasonic welding head is disposed within the support frame, the lower mold is disposed on the support frame, the sliding block is disposed on one side of the support frame, and the sliding block is movably connected to the base body.

[0011] Furthermore, the base has a base body, fixed legs, and a sliding groove.

[0012] Furthermore, the bottom of the base body is provided with the fixed support foot, and two sliding grooves are provided opposite to each other in the base body, with the two ends of the sliding block respectively movably connected to one of the sliding grooves.

[0013] Furthermore, the opening and closing drive mechanism includes an opening and closing drive cylinder, an opening and closing drive telescopic piston rod, an opening and closing guide slider, and an opening and closing guide rail.

[0014] Furthermore, the opening and closing drive cylinder is disposed on the top of the base body, and the opening and closing drive cylinder is drivenly connected to the opening and closing drive telescopic piston rod, one end of the opening and closing drive telescopic piston rod being connected to the upper mold.

[0015] Furthermore, the opening and closing guide slider is provided on one side of the upper mold, and the opening and closing guide rail is provided in the base body, with the opening and closing guide slider movably connected to the opening and closing guide rail.

[0016] In summary, this utility model discloses an ultrasonic welding device for welding plastic toys, comprising a base, an elastic support, an ultrasonic welding head, a lower mold, an upper mold, and an opening / closing drive mechanism. The elastic support is housed within the base, the ultrasonic welding head is disposed within the elastic support, and the lower mold is mounted on the elastic support. The upper mold is movably mounted on top of the lower mold. The opening / closing drive mechanism is located within the base and is drivenly connected to the upper mold. When the upper mold is driven downwards by the opening / closing drive mechanism to abut against the lower mold, the downward movement of the upper mold presses against the lower mold, transmitting the impact force generated during the contact downwards to the elastic support. The elastic support buffers and cancels this instantaneous impact force, thus preventing damage caused by the upper mold colliding with the lower mold or other components under the drive of cylinders or other driving parts. Therefore, this utility model's ultrasonic welding device for welding plastic toys solves the technical problem of how to improve the mold's performance during plastic toy welding, which is easily damaged by collisions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an ultrasonic welding device for welding plastic toys according to the present invention;

[0018] Figure 2This is a schematic diagram of the ultrasonic welding device for welding plastic toys according to this utility model from another direction;

[0019] Figure 3 This is a schematic diagram of another part of the structure of the ultrasonic welding device for welding plastic toys according to this utility model. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Please refer to the following: Figures 1 to 3 This utility model discloses an ultrasonic welding device for welding plastic toys, comprising: a base 1, an elastic support 2, an ultrasonic welding head 3, a lower mold 4, an upper mold 5, and an opening and closing drive mechanism 6; the elastic support 2 is disposed in the base 1, the ultrasonic welding head 3 is disposed in the elastic support 2, and the lower mold 4 is disposed on the elastic support 2; the upper mold 5 is movably disposed on the lower mold 4, and the opening and closing drive mechanism 6 is disposed in the base 1 and is drivenly connected to the upper mold 5.

[0027] Specifically, when the ultrasonic welding device for welding plastic toys according to this utility model is in operation, the operator can place the plastic toy parts to be assembled into the lower mold 4. After the lower mold 4 initially limits the plastic toy parts, the opening and closing drive mechanism 6 is activated and drives the upper mold 5 to move down along a preset stroke until the upper mold 5 and the lower mold 4 are closed and connected. At this time, the plastic toy product placed in the lower mold 4 is completely limited and a pre-compression force is applied to the plastic product. After that, the ultrasonic welding head 3 can release vibration energy of a specific frequency according to a preset program. After maintaining it for a preset duration, the interface temperature can reach 80%-120% of the material's melting point. Thus, the plastic product placed between the upper mold 5 and the lower mold 4 is welded. When the upper mold 5 is driven downward by the opening and closing drive mechanism 6 to abut against the lower mold 4, the upper mold 5 presses down on the lower mold 4, and transmits the impact force generated during the contact downward to the elastic support seat 2. The elastic support seat 2 buffers and cancels this instantaneous impact force; thus, it can prevent the upper mold 5 from colliding with the lower mold 4 and other components under the drive of cylinders and other drive components, thus avoiding damage. Therefore, the ultrasonic welding device for welding plastic toys of this utility model solves the technical problem of how to improve the mold that is easily damaged by collision during the welding of plastic toys.

[0028] Furthermore, the elastic support 2 includes a bottom support 201, a guide post connecting seat 202, a support frame 203, a guide post 204, a spring 205, and a sliding block 206; the bottom support 201 is disposed at the lower part of the base 1, and the guide post connecting seat 202 is disposed on the bottom support 201; the support frame 203 is disposed on the guide post connecting seat 202, the guide post 204 connects the guide post connecting seat 202 and the support frame 203 respectively, the spring 205 connects the guide post connecting seat 202 and the support frame 203, and the spring 205 is sleeved on the guide post 204; the ultrasonic welding head 3 is disposed in the support frame 203, the lower mold 4 is disposed on the support frame 203, and the sliding block 206 is disposed on one side of the support frame 203, and the sliding block 206 is movably connected to the base 1.

[0029] Furthermore, the base 1 has a base body 101, fixed support legs 102, and sliding grooves 103; the fixed support legs 102 are provided at the bottom of the base body 101, and two sliding grooves 103 are provided opposite to each other in the base body 101, and the two ends of the sliding block 206 are respectively movably connected to one of the sliding grooves 103.

[0030] Specifically, when the lower mold 4 is abutted or collided during mold closing, it can transmit the impact force downward to the support frame 203. The support frame 203, under pressure, is guided downward by the guide post 204 and the sliding block 206, thereby compressing the spring located between the support frame 203 and the guide post connecting seat 202, thus absorbing the aforementioned impact force. After the support frame 203 is pressed down to its lowest point, the impact force has been buffered, and the compressed spring 205 returns to its original shape to push the support frame 203 and the lower mold 4 back to their original positions. During the aforementioned process of absorbing impact force, the ultrasonic welding head 3 can move along with the support frame 203, and the sliding block 206 can slide in the groove 103, thereby limiting and guiding the movement of the support frame 203.

[0031] Furthermore, the ultrasonic welding head 3 is a conventional component in the art. As an acoustic actuator in ultrasonic welding equipment, it can receive high-frequency vibration energy through the transducer and amplitude transformer and accurately transmit it to the contact surface of the workpiece, thereby completing the intermolecular frictional fusion of the plastic toy material.

[0032] Furthermore, the opening and closing drive mechanism 6 includes an opening and closing drive cylinder 601, an opening and closing drive telescopic piston rod 602, an opening and closing guide slider 603, and an opening and closing guide rail 604. The opening and closing drive cylinder 601 is disposed on the top of the base 1, and the opening and closing drive cylinder 601 is drivenly connected to the opening and closing drive telescopic piston rod 602. One end of the opening and closing drive telescopic piston rod 602 is connected to the upper mold 5. The opening and closing guide slider 603 is disposed on one side of the upper mold 5, and the opening and closing guide rail 604 is disposed in the base 1. The opening and closing guide slider 603 is movably connected to the opening and closing guide rail 604.

[0033] Specifically, after the opening and closing drive cylinder 601 is activated, it can drive the opening and closing drive telescopic piston rod 602 to extend or retract, thereby driving the upper mold 5 to descend to close with the lower mold 4 or ascend to leave the lower mold 4 to expose the ultrasonically welded plastic toy product. When the upper mold 5 descends or ascends, the opening and closing guide slider 603 provided on its side can slide along the opening and closing guide rail 604 to make the downward or upward movement of the upper mold 5 more stable.

[0034] In summary, the ultrasonic welding device for welding plastic toys according to this utility model comprises a base 1, an elastic support 2, an ultrasonic welding head 3, a lower mold 4, an upper mold 5, and an opening and closing drive mechanism 6. The elastic support 2 is disposed within the base 1, the ultrasonic welding head 3 is disposed within the elastic support 2, and the lower mold 4 is disposed on the elastic support 2. The upper mold 5 is movably disposed on the lower mold 4. The opening and closing drive mechanism 6 is disposed within the base 1 and is drivenly connected to the upper mold 5. When the upper mold 5 is driven downward by the opening and closing drive mechanism 6 to abut against the lower mold 4, the upper mold 5 presses against the lower mold 4 and transmits the impact force generated during the abutment downward to the elastic support 2, which buffers and cancels the instantaneous impact force. Thus, it can prevent the upper mold 5 from colliding with the lower mold 4 and other components under the drive of cylinders and other drive components, thus avoiding damage. Therefore, this utility model provides an ultrasonic welding device for welding plastic toys, which solves the technical problem of how to improve the mold that is easily damaged by collisions during the welding of plastic toys.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An ultrasonic welding device for welding plastic toys, characterized in that, It includes: The assembly includes a base (1), an elastic support base (2), an ultrasonic welding head (3), a lower mold (4), an upper mold (5), and an opening and closing drive mechanism (6). The elastic support base (2) is disposed in the base (1), the ultrasonic welding head (3) is disposed in the elastic support base (2), and the lower mold (4) is disposed on the elastic support base (2). The upper mold (5) is relatively movably disposed on the lower mold (4), and the opening and closing drive mechanism (6) is disposed in the base (1). The opening and closing drive mechanism (6) is drivenly connected to the upper mold (5).

2. The ultrasonic welding device for welding plastic toys according to claim 1, characterized in that: The elastic support seat (2) has a bottom support (201), a guide post connecting seat (202), a support frame (203), a guide post (204), a spring (205), and a sliding block (206).

3. The ultrasonic welding device for welding plastic toys according to claim 2, characterized in that: The bottom support (201) is disposed at the lower part of the base (1), and the guide post connecting seat (202) is disposed on the bottom support (201); the support frame (203) is disposed on the guide post connecting seat (202), the guide post (204) connects the guide post connecting seat (202) and the support frame (203) respectively, the spring (205) is connected between the guide post connecting seat (202) and the support frame (203), and the spring (205) is sleeved on the guide post (204).

4. The ultrasonic welding device for welding plastic toys according to claim 3, characterized in that: The ultrasonic welding head (3) is disposed in the support frame (203), the lower mold (4) is disposed on the support frame (203), the sliding block (206) is disposed on one side of the support frame (203), and the sliding block (206) is movably connected to the seat (1).

5. The ultrasonic welding device for welding plastic toys according to claim 4, characterized in that: The seat (1) has a base body (101), fixed support legs (102) and a slide (103).

6. The ultrasonic welding device for welding plastic toys according to claim 5, characterized in that: The base body (101) is provided with a fixed support foot (102) at its bottom. Two sliding grooves (103) are provided opposite to each other in the base body (101). The two ends of the sliding block (206) are respectively movably connected to one of the sliding grooves (103).

7. The ultrasonic welding device for welding plastic toys according to claim 6, characterized in that: The opening and closing drive mechanism (6) includes an opening and closing drive cylinder (601), an opening and closing drive telescopic piston rod (602), an opening and closing guide slider (603), and an opening and closing guide rail (604).

8. The ultrasonic welding device for welding plastic toys according to claim 7, characterized in that: The opening and closing drive cylinder (601) is located on the top of the base (1). The opening and closing drive cylinder (601) is driven to connect with the opening and closing drive telescopic piston rod (602). One end of the opening and closing drive telescopic piston rod (602) is connected to the upper mold (5).

9. The ultrasonic welding device for welding plastic toys according to claim 8, characterized in that: The opening and closing guide slider (603) is provided on one side of the upper mold (5), and the opening and closing guide rail (604) is provided in the base (1). The opening and closing guide slider (603) is movably connected to the opening and closing guide rail (604).

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