A new process channel

Abstract

The utility model discloses a novel process flow channel, including the main flow channel, first -class shunt, two -class shunt and the gate that are connected in proper order, two -class shunt is half surrounded, and the gate of two ends of two -class shunt is connected product through fixed glue position respectively. This process flow channel structure is novel, through adding half surrounded two -class shunt on the basis of original flow channel structure, make the fixed glue position that originally far from the main flow channel to connect the gate, and this fixed glue position also is included in the flow channel system, in the ultrasonic cutting process, two fixed glue positions can all receive the high -frequency friction heat and mechanical pressure that the vibration head transmits, realize synchronous accurate fracture, avoid the cutting not complete, artificial finishing and potential safety hidden danger that lead to because one side fixed glue position separates from the flow channel in traditional structure, ensure the fixed glue position area melt filling simultaneously, give both sides to the demoulding stability and post -treatment efficiency, effectively promote product appearance quality and yield, realize injection molding and ultrasonic cutting process's high -efficient cooperation.

Description

Technical Field

[0001] This utility model relates to the field of injection molding product processing technology, and in particular to a novel process flow channel. Background Technology

[0002] In the field of injection molding, ultrasonic cutting is a process technology that uses ultrasonic energy to cut or separate injection-molded products. It is mainly used in the post-processing of plastic products. The ultrasonic generator converts electrical energy into high-frequency mechanical vibration, which is transmitted to the vibrator through the transducer and amplitude transformer. When the high-frequency vibration of the vibrator comes into contact with the process flow channel, friction generates instantaneous high temperature, causing the product and the gate of the process flow channel to soften or melt locally. At the same time as the vibration, mechanical pressure is applied to achieve precise cutting of the gate, making the cut smooth and burr-free.

[0003] The ultrasonic gate cutter consists of pneumatic machinery, a control system, an ultrasonic generator, a transducer, an ultrasonic welding head, and a fixture. Its working principle involves placing the plastic workpiece from the injection molding machine into a fixed mold, activating the switch, and causing the ultrasonic welding head to descend and press against the workpiece, vibrating it at high frequency. When the gate with a small cross-section is activated by the ultrasonic energy, the friction between plastic molecules is activated due to the high temperature, increasing stress and causing the runner at the gate to break. The cut gate workpiece has a smooth, flat surface without whitening, achieving an aesthetically pleasing appearance similar to direct injection molding, saving significant labor and improving production efficiency.

[0004] However, as Figure 1 As shown, in the actual injection molding process, due to the limitations of the product 10's shape, some plastic parts require auger rotation to separate from the injection mold during demolding. To ensure the product 10 is properly fixed during auger rotation, two fixing points 5 are made on the product 10. In the existing process runner design, one fixing point 5 is located at the gate 4 of the process runner, which can separate from the product 10 during ultrasonic cutting. The other fixing point 5 is far from the process runner, which leads to the following when ultrasonically cutting and separating (e.g. Figure 2 and Figure 3 As shown, the transducer 30 of the ultrasonic sprue cutter cannot transmit high temperature and pressure to the fixed glue position 5, which is far from the process flow channel. Subsequently, the fixed glue position 5 can only be repaired manually before it can be put into storage. This not only wastes time and manpower, but more importantly, it poses a safety hazard. In addition, the fixed glue position 5, which is far from the process flow channel, may also have material shortage defects, leading to threading failure and a decrease in product yield. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a new type of process flow channel that can improve production efficiency and yield.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a novel process flow channel, comprising a main flow channel, a primary branch flow channel, a secondary branch flow channel and a gate connected in sequence, wherein the secondary branch flow channel is semi-enclosed, and the gates at both ends of the secondary branch flow channel are respectively connected to the product through fixed glue positions.

[0007] Furthermore, the secondary diversion channel is semi-circular in shape.

[0008] Furthermore, the fixed adhesive position is a stepped structure extending downwards, and the connection between the gate and the fixed adhesive position is located on the top surface of the stepped structure.

[0009] Furthermore, the fixing adhesive position is located on the outside of the product.

[0010] Furthermore, a cooling well is provided at one end of the main flow channel, and there are multiple primary branch channels. The end of the primary branch channel away from the secondary branch channel is connected to the cooling well.

[0011] Furthermore, the cooling well is in the shape of a truncated pyramid.

[0012] Furthermore, the main flow channel is a vertical flow channel, and the main flow channel is conical.

[0013] Furthermore, the primary diversion channel is linear.

[0014] The beneficial effects of this utility model are as follows: The process flow channel structure is novel. By adding a semi-enclosed secondary flow channel on the basis of the original flow channel structure, the fixed glue position that was originally far away from the main flow channel can be connected to the gate. At the same time, the fixed glue position is also incorporated into the flow channel system. Thus, during the ultrasonic cutting process, both fixed glue positions can be subjected to high-frequency frictional heat and mechanical pressure transmitted by the vibrator, achieving synchronous and precise fracture. This avoids the incomplete cutting, manual trimming, and potential safety hazards caused by the fixed glue position on one side detaching from the flow channel in the traditional structure. At the same time, it ensures that the melt in the fixed glue position area is full and there are no material defects. It takes into account the demolding stability and post-processing efficiency, effectively improves the product appearance quality and yield, reduces the cost of manual intervention, and achieves efficient synergy between injection molding and ultrasonic cutting processes. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of an injection-molded part formed using existing process flow channels; Figure 2 A cross-sectional schematic diagram of the ultrasonic sprue cutter in conjunction with an existing injection molded part; Figure 3 for Figure 2 Enlarged view of detail A in the middle; Figure 4 A schematic diagram of the structure of an injection-molded workpiece formed using the process flow channel described in Example 1. Figure 1 ; Figure 5 A schematic diagram of the structure of an injection-molded workpiece formed using the process flow channel described in Example 1. Figure 2 ; Figure 6 This is a schematic diagram showing the interaction between the ultrasonic sprue cutter and the injection molded workpiece in Example 1. Figure 7 This is a cross-sectional schematic diagram showing the ultrasonic sprue cutter in conjunction with the injection molded workpiece in Example 1. Figure 8 for Figure 7 A magnified view of detail B.

[0016] Label Explanation: 1. Main runner; 2. Primary runner; 3. Secondary runner; 4. Gate; 5. Fixed runner; 6. Cooling well; 10. Product; 20. Product fixing plate; 30. Vibration head. Detailed Implementation

[0017] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0018] Please refer to Figure 4 as well as Figure 5 A novel process flow channel includes a main flow channel 1, a primary runner 2, a secondary runner 3, and a gate 4 connected in sequence. The secondary runner 3 is semi-enclosed, and the gates 4 at both ends of the secondary runner 3 are connected to the product 10 through fixed glue positions 5.

[0019] As can be seen from the above description, the beneficial effects of this utility model are as follows: The process flow channel structure is novel. By adding a semi-enclosed secondary flow channel 3 on the basis of the original flow channel structure, the fixed glue position 5, which was originally far away from the main flow channel 1, can be connected to the gate 4. At the same time, the fixed glue position 5 is also incorporated into the flow channel system. Thus, during the ultrasonic cutting process, both fixed glue positions 5 can be subjected to high-frequency frictional heat and mechanical pressure transmitted by the vibrator 30, achieving synchronous and precise fracture. This avoids the incomplete cutting, manual trimming, and potential safety hazards caused by the fixed glue position 5 on one side detaching from the flow channel in the traditional structure. At the same time, it ensures that the melt in the area of ​​the fixed glue position 5 is full and there are no defects of missing material. It takes into account the demolding stability and post-processing efficiency, effectively improves the appearance quality and yield of the product 10, reduces the cost of manual intervention, and achieves efficient synergy between injection molding and ultrasonic cutting processes.

[0020] Furthermore, the secondary diversion channel 3 is semi-circular in shape.

[0021] As described above, the semi-circular secondary runner 3 occupies little space in the mold and can naturally and symmetrically extend to the opposite side of the product 10, making the distance between the two gates 4 and the two sides of the product 10 equal, the melt flow path consistent, reducing flow shear differences, ensuring that the two fixed glue positions 5 are filled at the same time, improving the uniformity of force during ultrasonic cutting, and avoiding incomplete fracture on one side; at the same time, the semi-circular secondary runner 3 can make the melt flow smoothly, which is conducive to ensuring the molding quality of the product 10.

[0022] Furthermore, the fixed adhesive position 5 is a stepped structure extending downwards, and the connection between the gate 4 and the fixed adhesive position 5 is located on the top surface of the stepped structure.

[0023] As described above, the fixed glue position 5 is designed as a downward-extending stepped structure, with the gate 4 overlapping the top surface of the step. After solidification, it breaks on the same plane, with a clean cut flush with the outer wall of the product 10, avoiding any residual protrusions at the root of the step, thus balancing appearance and demolding positioning. The top surface of the step provides ample contact area, allowing for efficient transmission of ultrasonic energy and ensuring the complete dislodgement of the fixed glue position 5. Simultaneously, the stepped structure itself retains its function of positioning with the mold during demolding, without affecting threaded demolding.

[0024] Furthermore, the fixing adhesive position 5 is located on the outside of the product 10.

[0025] As described above, the fixed adhesive position 5 is placed on the outside of the product 10, without encroaching on the internal functional space of the product 10, and avoiding interference with the assembly or appearance. The outer position allows the semi-enclosed flow channel to be arranged along the outer periphery of the product 10, shortening the total length of the flow channel and reducing melt pressure loss. At the same time, the outer fixed adhesive position 5 is more easily exposed to the action range of the transducer 30 during ultrasonic cutting, resulting in more thorough breakage.

[0026] Furthermore, a cooling well 6 is provided at one end of the main flow channel 1, and there are multiple primary flow channels 2. The end of the primary flow channel 2 away from the secondary flow channel 3 is connected to the cooling well 6.

[0027] As described above, the cooling well 6 is located at the end of the main channel 1, which can collect cold material and impurities from the front end and prevent low-temperature melt from entering the primary distribution channel 2 and causing blockage. Multiple primary distribution channels 2 share the same cooling well 6 to achieve synchronous material supply to multiple cavities, ensure pressure balance in each cavity, and make the melt temperature in the semi-enclosed secondary distribution channel 3 consistent, reducing poor cutting caused by temperature difference.

[0028] Furthermore, the cooling well 6 is in the shape of a truncated pyramid.

[0029] As described above, the side walls of the truncated square cooling well 6 are inclined, which increases the storage capacity of cold material and facilitates the smooth release of solidified material when the mold is opened, avoiding material jamming in the cold material well and causing machine shutdown for cleaning, thus ensuring the stability of continuous production.

[0030] Furthermore, the main flow channel 1 is a vertical flow channel, and the main flow channel 1 is conical.

[0031] As can be seen from the above description, the main channel 1 is designed in a conical shape, which helps to optimize the filling of the mold cavity by the melt, and at the same time, the solidified plastic can be better demolded after cooling, thus realizing automated production.

[0032] Furthermore, the primary diversion channel 2 is linear.

[0033] As can be seen from the above description, the straight primary runner 2 has the shortest flow path and fewer turns, resulting in less pressure loss of the melt along the flow path. It can quickly transport the melt from the main runner 1 to the semi-enclosed secondary runner 3, reducing heat loss of the melt and maintaining a higher temperature when entering the gate 4. This is beneficial for local softening during ultrasonic cutting and improves the fracture quality.

[0034] The first embodiment of this utility model is as follows: a novel process flow channel is applied in an injection molding mold, which can facilitate the subsequent ultrasonic cutting of the product 10 using a rotary die for demolding. The product 10 has fixed glue positions 5 connected to opposite sides. The fixed glue positions 5 are used to cooperate with the rotary die demolding of the product 10. The fixed glue positions 5 are removed during ultrasonic cutting.

[0035] To facilitate the description of this novel process flow channel, this embodiment uses an injection-molded workpiece (please refer to...). Figure 4 and Figure 5 To describe it.

[0036] The novel process runner includes a main runner 1, a primary runner 2, a secondary runner 3, and a gate 4 connected in sequence. The main runner 1 is a vertical runner and is conical in shape. The secondary runner 3 is semi-enclosed, preferably semi-circular. The primary runner 2 is straight. The connection between the primary runner 2 and the secondary runner 3 is located in the middle of the secondary runner 3. The gates 4 at both ends of the secondary runner 3 are connected to the product 10 through fixed glue positions 5.

[0037] In this embodiment, the fixing glue position 5 is a stepped structure extending downwards, and the connection between the gate 4 and the fixing glue position 5 is located on the top surface of the stepped structure. Preferably, the fixing glue position 5 is located on the outside of the product 10.

[0038] In one or more embodiments, the diameter of the main channel 1 gradually increases from the end furthest from the primary branch channel 2 toward the end closest to the primary branch channel 2; while in another embodiment, the diameter of the main channel 1 gradually decreases from the end furthest from the primary branch channel 2 toward the end closest to the primary branch channel 2; of course, it is also possible for the diameter of each region of the main channel 1 to be the same.

[0039] A cooling well 6 is provided at one end of the main flow channel 1. There are multiple primary flow channels 2. The end of the primary flow channel 2 away from the secondary flow channel 3 is connected to the cooling well 6. In this embodiment, the cooling well 6 is in the shape of a truncated pyramid, and the primary flow channels 2 are connected to the four sides of the cooling well 6 respectively.

[0040] Figures 6-8 A schematic diagram is shown of using an ultrasonic sprue cutter to cut the runner of an injection-molded workpiece. The ultrasonic sprue cutter has a product fixing plate 20 and a vibrator 30. The product fixing plate 20 is used to place the injection-molded workpiece, and the vibrator 30 is used to generate cutting energy.

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A novel process flow channel, characterized in that, It includes a main runner, a primary runner, a secondary runner, and a gate connected in sequence. The secondary runner is semi-enclosed, and the gates at both ends of the secondary runner are connected to the product through fixed glue positions.

2. The novel process flow channel according to claim 1, characterized in that, The secondary diversion channel is semi-circular in shape.

3. The novel process flow channel according to claim 1, characterized in that, The fixed glue position is a stepped structure extending downwards, and the connection between the gate and the fixed glue position is located on the top surface of the stepped structure.

4. The novel process flow channel according to claim 3, characterized in that, The fixing adhesive position is located on the outside of the product.

5. The novel process flow channel according to claim 1, characterized in that, A cooling well is provided at one end of the main flow channel, and there are multiple primary flow channels. The end of the primary flow channel away from the secondary flow channel is connected to the cooling well.

6. The novel process flow channel according to claim 5, characterized in that, The cooling well is shaped like a truncated pyramid.

7. The novel process flow channel according to claim 1, characterized in that, The main flow channel is a vertical flow channel, and the main flow channel is conical.

8. The novel process flow channel according to claim 1, characterized in that, The primary diversion channel is straight.

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