A forming device for processing an automobile seat headrest

Abstract

This utility model discloses a molding device for processing automotive seat headrests, belonging to the technical field of automotive seat headrest processing devices. The utility model includes two semi-molding mold bodies, a drive unit, and a filling tube. Each semi-molding mold body has a mold cavity and three pre-reserved slots, all of which communicate with the mold cavity. A tee pipe is provided at the bottom end of the filling tube. This utility model uses branching sections and pre-reserved slots to divert foam flow, increasing the flow path and coverage of the foam within the mold cavity. This effectively avoids the problem of uneven foam distribution when injected through a single filling tube. For complex headrest structures, such as saddle-shaped headrests with curved surfaces, it ensures that the foam is evenly filled to all corners of the mold cavity, maintaining consistent foam density in different parts of the headrest and effectively reducing air bubble formation, thereby improving the overall performance and comfort of the headrest.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive seat headrest processing devices, specifically a forming device for processing automotive seat headrests. Background Technology

[0002] The molding process of car seat headrests typically employs foam injection molding technology, which involves injecting foamed material (such as polyurethane PU or EPP) into a mold cavity, encasing an internal metal / plastic skeleton, and then curing it. For example, a car seat headrest molding machine disclosed in a Chinese authorized patent (application number: CN202320439157.9) includes two symmetrically arranged semi-molded molds and multiple fixing mechanisms. When in use, the valve is opened, and the headrest molding foam in the headrest molding foam filling box is introduced into the two joined semi-molded molds through the filling pipe, encasing the skeleton inside the car seat headrest molding cavity. After solidification, it is formed. However, this device still has certain defects in use and needs to be improved.

[0003] In existing molding devices, when foam is injected through a single filling tube, the flow direction and speed of the foam within the mold cavity are restricted, making it difficult to achieve uniform distribution throughout the mold cavity. For some headrests with complex curved surfaces or special structures, such as saddle-shaped headrests with curved surfaces, the irregular shape of the mold cavity makes it easier for foam to accumulate locally or be insufficiently filled during the filling process. This results in differences in foam density in different parts of the headrest, which in turn affects the overall performance and comfort of the headrest. Utility Model Content

[0004] The purpose of this invention is to provide a molding device for processing automotive seat headrests, which solves the problem of difficulty in uniformly distributing foam by using branch sections and reserved grooves to divert foam.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model relates to a molding device for processing automotive seat headrests, comprising a semi-molding mold body, a driving part, and a filling tube. There are two semi-molding mold bodies, each with a mold cavity and three pre-reserved slots connected to the mold cavity. A tee pipe is provided at the bottom of the filling tube, and a branch section is provided at the end of the tee pipe. The branch section has a first branch pipe, a second branch pipe, and a third branch pipe. The top ends of the first, second, and third branch pipes are connected to the bottom of the tee pipe, and the second, first, and third branch pipes respectively fit into their corresponding pre-reserved slots.

[0007] Furthermore, the bottom ends of the first branch pipe, the second branch pipe and the third branch pipe are all provided with sealing rings, and the semi-formed mold body is provided with sealing grooves. There are three sealing grooves, and the sealing grooves are connected to the reserved grooves. The sealing rings are located in the sealing grooves.

[0008] Furthermore, one-way valves are installed at the top of the first branch pipe, the second branch pipe, and the third branch pipe.

[0009] Furthermore, the ends of the first branch pipe, the second branch pipe and the third branch pipe are all provided with branch nozzles. The top of the branch nozzle has a wide opening and the bottom of the branch nozzle has a narrow opening, which is located inside the mold cavity.

[0010] Furthermore, the drive unit has a U-shaped plate and a bidirectional threaded rod. The two ends of the bidirectional threaded rod are fitted onto the two side plates of the U-shaped plate, and both ends of the bidirectional threaded rod are threaded with moving blocks. The two semi-formed mold bodies are respectively connected to the corresponding moving blocks.

[0011] Furthermore, a slider is installed at the bottom of the movable block, and a groove is provided on the U-shaped plate to match the slider.

[0012] This utility model has the following beneficial effects:

[0013] This invention diverts foam flow through branch sections and reserved slots, increasing the flow path and coverage of foam within the mold cavity. This effectively avoids the problem of uneven foam distribution when injected through a single filling tube. For complex headrest structures, such as saddle-shaped headrests with curved surfaces, it ensures that foam is evenly filled into every corner of the mold cavity, maintaining consistent foam density in different parts of the headrest and effectively reducing bubble formation, thereby improving the overall performance and comfort of the headrest.

[0014] This invention uses branch nozzles to equalize foam pressure. After the foam enters the branch nozzle from the branch section, it enters from the wide opening of the branch nozzle and then exits into the mold cavity from the narrow opening. Since the flow rate is inversely proportional to the pipe diameter and pressure, the foam flow rate increases as the pipe diameter of the branch nozzle decreases. This allows for adjustment of the pressure at the narrow opening of each branch nozzle, ensuring that the foam reaches pressure equalization at the outlets of different branch nozzles. This ensures that the foam can fill all parts of the mold cavity with similar pressure, avoiding local accumulation or insufficient filling and improving filling uniformity.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the molding device;

[0017] Figure 2This is a schematic diagram of the structure of the semi-molded mold body and the filling tube;

[0018] Figure 3 This is a schematic diagram of the filling tube and branch section;

[0019] Figure 4 This is a schematic diagram of the branch nozzle structure.

[0020] In the diagram: 1. Semi-molded mold body; 101. Mold cavity; 102. Reserved groove; 103. Sealing groove; 2. Drive unit; 201. U-shaped plate; 202. Threaded rod; 203. Moving block; 204. Slider; 3. Filling tube; 4. T-shaped tube; 5. First branch tube; 6. Second branch tube; 7. Third branch tube; 8. One-way valve; 9. Branch nozzle; 901. Wide opening; 902. Narrow opening; 10. Sealing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: a molding device for processing car seat headrests, including a semi-molding mold body 1, a driving part 2, and a filling tube 3. There are two semi-molding mold bodies 1, each with a mold cavity 101 and a reserved groove 102. There are three reserved grooves 102, and all three reserved grooves 102 are connected to the mold cavity 101. A three-way pipe 4 is provided at the bottom of the filling tube 3, and a branch is provided at the end of the three-way pipe 4. The branch has a first branch pipe 5, a second branch pipe 6, and a third branch pipe 7. The top ends of the first branch pipe 5, the second branch pipe 6, and the third branch pipe 7 are connected to the bottom of the three-way pipe 4, and the second branch pipe 6, the first branch pipe 5, and the third branch pipe 7 are respectively fitted into the corresponding reserved grooves 102.

[0023] During headrest processing, the drive source is activated to rotate the bidirectional threaded rod 202. As the slider 204 slides in the groove to limit the movement of the moving block 203, the rotation of the bidirectional threaded rod 202 can drive the two moving blocks 203 to move synchronously. This causes the two moving blocks 203 to move the corresponding semi-molded mold body 1 until the branch is wrapped. At this time, the first branch pipe 5, the second branch pipe 6, and the third branch pipe 7 are respectively located in the corresponding reserved groove 102, and the sealing ring 10 cooperates to enter the sealing groove 103 to seal the connection between the branch and the reserved groove 102. Then, the foam is injected through the filling box and flows through the filling pipe 3 from the three-way pipe 4, entering the first branch pipe 5, the second branch pipe 6, and the third branch pipe 7 respectively and injecting into different positions in the mold cavity 101, so that the foam can be injected into the mold cavity 101 from multiple directions at the same time.

[0024] The bottom ends of the first branch pipe 5, the second branch pipe 6, and the third branch pipe 7 are all equipped with sealing rings 10. The sealing rings 10 ensure that when foam is filled into the semi-molding mold body 1, the foam will not flow out from the reserved groove 102. The semi-molding mold body 1 is provided with sealing grooves 103. There are three sealing grooves 103. The sealing grooves 103 are connected to the reserved groove 102. The sealing rings 10 are located in the sealing grooves 103. The top ends of the first branch pipe 5, the second branch pipe 6, and the third branch pipe 7 are all equipped with one-way valves 8. The flow rate can be controlled by the one-way valves 8.

[0025] The ends of the first branch pipe 5, the second branch pipe 6, and the third branch pipe 7 are all provided with branch nozzles 9. The top of the branch nozzle 9 has a wide opening 901, and the bottom of the branch nozzle 9 has a narrow opening 902. The narrow opening 902 is located inside the mold cavity 101. After the foam enters the branch nozzle 9 from the branch section, it enters from the wide opening 901 of the branch nozzle 9 and then exits from the narrow opening 902 into the mold cavity 101. Since the flow rate is inversely proportional to the pipe diameter and pressure, the foam flow rate increases as the pipe diameter of the branch nozzle 9 decreases. This allows the pressure of the narrow opening 902 of each branch nozzle 9 to be adjusted, so that the foam reaches pressure balance at the outlet of different branch nozzles 9, ensuring that the foam can fill all parts of the mold cavity 101 with similar pressure.

[0026] The drive unit 2 has a U-shaped plate 201 and a bidirectional threaded rod 202. The two ends of the bidirectional threaded rod 202 are fitted onto the two side plates of the U-shaped plate 201. The two ends of the bidirectional threaded rod 202 are threaded with moving blocks 203. The two semi-formed mold bodies 1 are respectively connected to the corresponding moving blocks 203. A slider 204 is installed at the bottom of the moving block 203. The U-shaped plate 201 has a groove for matching the slider 204. When the headrest is processed, the drive source is started to drive the bidirectional threaded rod 202 to rotate. Since the slider 204 slides in the groove to limit the movement of the moving block 203, the bidirectional threaded rod 202 can drive the two moving blocks 203 to move synchronously when it rotates, so that the two moving blocks 203 drive the corresponding semi-formed mold bodies 1 to move.

[0027] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A molding apparatus for processing automotive seat headrests, comprising a semi-molding mold body (1) and a drive unit (2), characterized in that: The number of the semi-molding mold body (1) is two, and each of the two semi-molding mold bodies (1) is provided with a mold cavity (101). The number of the reserved grooves (102) is three, and the three reserved grooves (102) are all connected to the mold cavity (101). A filling tube (3) is provided with a three-way tube (4) at its bottom end. The end of the three-way tube (4) is provided with a branch section. The branch section has a first branch tube (5), a second branch tube (6) and a third branch tube (7). The top ends of the first branch tube (5), the second branch tube (6) and the third branch tube (7) are connected to the bottom of the three-way tube (4). The second branch tube (6), the first branch tube (5) and the third branch tube (7) are respectively fitted into the corresponding reserved grooves (102).

2. The forming device for processing a headrest of an automobile seat according to claim 1, characterized in that, The bottom ends of the first branch pipe (5), the second branch pipe (6) and the third branch pipe (7) are all provided with sealing rings (10). The semi-formed mold body (1) is provided with sealing grooves (103). There are three sealing grooves (103). The sealing grooves (103) are connected to the reserved grooves (102). The sealing rings (10) are located in the sealing grooves (103).

3. The forming device for processing a headrest of an automobile seat according to claim 2, characterized in that, One-way valves (8) are provided at the top of the first branch pipe (5), the second branch pipe (6) and the third branch pipe (7).

4. The forming device for processing a headrest of an automobile seat according to claim 1, characterized in that, The ends of the first branch pipe (5), the second branch pipe (6) and the third branch pipe (7) are all provided with branch nozzles (9). The top of the branch nozzle (9) is provided with a wide opening (901) and the bottom of the branch nozzle (9) is provided with a narrow opening (902). The narrow opening (902) is located inside the mold cavity (101).

5. The forming device for processing an automobile seat headrest according to claim 1, characterized in that, The drive unit (2) has a U-shaped plate (201) and a bidirectional threaded rod (202). The two ends of the bidirectional threaded rod (202) are fitted onto the two side plates of the U-shaped plate (201). The two ends of the bidirectional threaded rod (202) are threaded with moving blocks (203). The two semi-molding mold bodies (1) are respectively connected to the corresponding moving blocks (203).

6. The forming device for processing a headrest of an automobile seat according to claim 5, wherein The bottom of the movable block (203) is equipped with a slider (204), and the U-shaped plate (201) is provided with a groove that matches the slider (204).

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