Anti-overflow exhaust position adjustable mechanism for foaming mold of headrest of desk and chair for noon break

Abstract

The utility model belongs to the technical field of molds, and particularly relates to an anti-overflow exhaust position adjustable mechanism for a foaming mold of a headrest of a noon break desk and chair. The device comprises a lower headrest foaming forming die and an upper headrest foaming forming die, a forming concave part is arranged in the lower headrest foaming forming die, a forming convex part is arranged on the upper headrest foaming forming die, and the forming concave part and the forming convex part correspond to each other in position and are matched with each other in shape. According to the utility model, through the adjustable rotary connecting piece, the exhaust position can be flexibly adjusted according to different foaming processes and headrest shapes, the smooth exhaust of gas is ensured, the defects of bubbles, cavities and the like in the headrest are reduced, the product quality is improved, and a one-way valve in the anti-overflow exhaust mechanism effectively prevents the reverse flow of materials and prevents the overflow phenomenon; raw materials are saved, production cost is reduced, pollution to the die and equipment is reduced, and the service life of the die is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an adjustable venting mechanism for preventing overflow of foam in a lunch break desk and chair headrest foam mold. Background Technology

[0002] In the production of headrests for desks and chairs used during lunch breaks, the performance of the foaming mold has a crucial impact on product quality. Traditional headrest foaming molds have several shortcomings: 1. Venting issues: Existing molds have fixed venting positions, which cannot be adjusted according to different foaming processes and product requirements. This can lead to poor gas venting during the foaming process, causing defects such as air bubbles and voids inside the headrest, seriously affecting product quality and comfort. 2. Overflow issues: During the foaming process, due to poor mold sealing performance or improper pressure control, material overflow is prone to occur. Overflow not only wastes raw materials and increases production costs, but also contaminates the mold and production equipment, affecting production efficiency and mold lifespan.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses a mold for producing latex pillows [application number: 201810736702.4], which includes a base, a lower mold base on the top of the base, slide rails symmetrically arranged on the top of the base outside the lower mold base, several servo electric cylinders matched in the slide rails on the top of the base, sliders at the bottom of the servo electric cylinders, an upper mold base matched above the lower mold base, a lower template, a lower mold core, a first temperature regulating layer and a second temperature regulating layer at the top center of the lower mold base, an upper template, an upper mold core and an installation groove at the bottom center of the upper mold base, an injection port at the top center of the upper mold base, a feeding mechanism sleeved on the top of the injection port, the feeding mechanism including a sleeve and a feeding component, the feeding component including a feeding cavity, several movably connected rotating shafts and spiral blades in the feeding cavity, movably connected connecting frames symmetrically arranged on both sides of the top of the outer wall of the sleeve, and fixed clamps symmetrically arranged on both sides of the outer wall of the injection port. However, the exhaust position of this solution is still fixed and cannot be adjusted according to different foaming processes and product requirements. This may still lead to poor gas exhaust during the foaming process, causing defects such as air bubbles and voids inside the headrest, which seriously affects the quality and comfort of the product and is also prone to material overflow. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing an adjustable venting mechanism for preventing overflow of foam in the headrest foaming mold of desks and chairs during lunch break.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An adjustable anti-overflow venting mechanism for a foam molded headrest for a midday rest desk and chair includes a lower mold and an upper mold. The lower mold has a molding recess, and the upper mold has a molding protrusion. The molding recess and the molding protrusion are positioned and matched. An adjustable rotating connector is provided between the lower and upper molds. One end of the adjustable rotating connector is connected to the lower mold, and the other end is connected to the upper mold. An anti-overflow venting mechanism is provided in the upper mold, and the anti-overflow venting mechanism is connected to the molding recess.

[0007] In the aforementioned adjustable venting mechanism for the anti-overflow material venting of the headrest foam mold for lunch break desks and chairs, the anti-overflow material venting mechanism includes two venting channels disposed within the upper mold of the headrest foam molding, and the venting channels are provided with an anti-overflow structure.

[0008] In the aforementioned adjustable venting mechanism for the foam mold of lunch break desks, chairs and headrests, the anti-overflow structure is a one-way valve. The one-way valve is located in the venting channel to allow gas to be discharged and prevent material backflow.

[0009] In the aforementioned adjustable mechanism for preventing overflow and venting the foam mold of the headrest for lunch break desks and chairs, the adjustable rotating connector includes a side pin shaft disposed between the lower mold and the upper mold of the headrest foam molding. A first connecting plate and a second connecting plate are rotatably connected to the side pin shaft. The first connecting plate is connected to the lower mold of the headrest foam molding, and the second connecting plate is connected to the upper mold of the headrest foam molding.

[0010] In the aforementioned adjustable mechanism for preventing overflow and venting the foam mold of the lunch break desk and chair headrest, a first sealing protrusion is provided inside the lower mold of the headrest foam molding.

[0011] In the aforementioned adjustable mechanism for preventing overflow and venting the foam mold of the lunch break desk and chair headrest, a second sealing protrusion is provided in the upper mold of the headrest foam forming, and the first sealing protrusion abuts against the second sealing protrusion.

[0012] In the aforementioned adjustable mechanism for preventing overflow and venting the foam mold of the lunch break desk and chair headrest, a mold closing and positioning component is provided between the lower mold and the upper mold of the headrest foam molding.

[0013] In the above-mentioned adjustable mechanism for preventing overflow and venting the foam mold of the lunch break desk and chair headrest, the mold closing positioning component includes several mold closing recesses disposed in the lower mold of the headrest foaming and several mold closing protrusions of the upper mold of the headrest foaming. The mold closing recesses and the mold closing protrusions are positioned correspondingly and matched in shape.

[0014] In the aforementioned adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest, the lower mold of the headrest foam molding has a lower mold cooling pipe.

[0015] In the aforementioned adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest, the upper mold of the headrest foam molding has an upper mold cooling pipe.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This utility model, through an adjustable rotating connector, can flexibly adjust the exhaust position according to different foaming processes and headrest shapes, ensuring smooth gas discharge, reducing defects such as air bubbles and voids inside the headrest, improving product quality, and the one-way valve in the anti-overflow exhaust mechanism effectively prevents material backflow, prevents overflow, saves raw materials, reduces production costs, and at the same time reduces contamination of molds and equipment, extending the service life of molds.

[0018] 2. The mold closing and positioning component in this utility model ensures the accurate position when the upper and lower molds are closed, making the headrest molding size more precise and improving product consistency and yield.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the lower mold for foam molding of the headrest.

[0022] Figure 3 This is a schematic diagram of the structure of the upper mold for foam molding of the headrest.

[0023] Figure 4 This is a cross-sectional schematic diagram of the present invention.

[0024] In the figure: 1. Lower mold for headrest foaming; 2. Upper mold for headrest foaming; 3. Molding recess; 4. Molding protrusion; 5. Adjustable rotating connector; 6. Anti-overflow venting mechanism; 7. Venting channel; 8. Anti-overflow structure; 9. Side pin; 10. First connecting plate; 11. Second connecting plate; 12. First sealing protrusion; 13. Second sealing protrusion; 14. Mold closing positioning component; 15. Mold closing recess; 16. Mold closing protrusion; 17. Lower mold cooling pipe; 18. Upper mold cooling pipe. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown, an adjustable anti-overflow venting mechanism for a headrest foam mold for a midday rest desk and chair includes a lower headrest foam molding mold 1 and an upper headrest foam molding mold 2. The lower headrest foam molding mold 1 has a molding recess 3, and the upper headrest foam molding mold 2 has a molding protrusion 4. The molding recess 3 and the molding protrusion 4 are positioned and matched in shape. An adjustable rotating connector 5 is provided between the lower headrest foam molding mold 1 and the upper headrest foam molding mold 2. One end of the adjustable rotating connector 5 is connected to the lower headrest foam molding mold 1, and the other end is connected to the upper headrest foam molding mold 2. An anti-overflow venting mechanism 6 is provided in the upper headrest foam molding mold 2, and the anti-overflow venting mechanism 6 is connected to the molding recess 3.

[0027] In this embodiment, during the molding process, the molding recess 3 and the molding protrusion 4 cooperate to form the cavity of the headrest. Through the adjustable rotating connector 5, the upper mold 2 of the headrest foam molding can rotate relative to the lower mold 1 of the headrest foam molding, thereby changing the communication position between the anti-overflow venting mechanism 6 and the molding recess 3, realizing the adjustment of the venting position. The anti-overflow venting mechanism 6 is used to allow gas to be discharged and prevent material backflow, effectively solving the overflow problem.

[0028] Combination Figure 1-4 As shown, the anti-overflow venting mechanism 6 includes two venting channels 7 disposed in the upper mold 2 of the headrest foaming molding. The venting channel 7 is provided with an anti-overflow structure 8, which is a one-way valve. The one-way valve is disposed in the venting channel 7 to allow gas to be discharged and prevent material backflow.

[0029] In this embodiment, the one-way valve in the exhaust channel 7 effectively prevents material backflow, prevents overflow, saves raw materials, reduces production costs, and at the same time reduces contamination of molds and equipment, extending the service life of molds.

[0030] Combination Figure 1 , Figure 4 As shown, the adjustable rotating connector 5 includes a side pin 9 disposed between the lower mold 1 and the upper mold 2 of the headrest foaming. A first connecting plate 10 and a second connecting plate 11 are rotatably connected to the side pin 9. The first connecting plate 10 is connected to the lower mold 1 of the headrest foaming, and the second connecting plate 11 is connected to the upper mold 2 of the headrest foaming.

[0031] In this embodiment, the first connecting plate 10 is connected to the lower mold 1 of the headrest foaming process, and the second connecting plate 11 is connected to the upper mold 2 of the headrest foaming process. This structure is simple and reliable, and facilitates the relative rotation of the upper and lower molds.

[0032] The lower mold 1 for foaming the headrest is provided with a first sealing protrusion 12, and the upper mold 2 for foaming the headrest is provided with a second sealing protrusion 13. The first sealing protrusion 12 and the second sealing protrusion 13 abut against each other.

[0033] In this embodiment, the first sealing protrusion 12 abuts against the second sealing protrusion 13, further improving the sealing performance of the mold and reducing the possibility of overflow.

[0034] A mold closing positioning component 14 is provided between the lower mold 1 and the upper mold 2 of the headrest foam forming. The mold closing positioning component 14 includes a plurality of mold closing recesses 15 disposed in the lower mold 1 of the headrest foam forming and a plurality of mold closing protrusions 16 of the upper mold 2 of the headrest foam forming. The mold closing recesses 15 and the mold closing protrusions 16 are positioned correspondingly and matched in shape.

[0035] In this embodiment, when the mold is closed, the mold closing recess 15 engages with the mold closing protrusion 16 to ensure the accurate position of the upper and lower molds during mold closing and to guarantee the product forming accuracy.

[0036] Combination Figure 1-4 As shown, the lower mold 1 for foaming the headrest has a lower mold cooling pipe 17, and the upper mold 2 for foaming the headrest has an upper mold cooling pipe 18.

[0037] In this embodiment, after foaming and molding, coolant can be introduced through the lower mold cooling pipe 17 and the upper mold cooling pipe 18 to accelerate the cooling and shaping of the headrest and improve production efficiency.

[0038] The working principle of this utility model is as follows:

[0039] First, connect the lower mold 1 and upper mold 2 of the headrest foam molding using the adjustable rotating connector 5, ensuring that the first connecting plate 10 is firmly connected to the lower mold 1 and the second connecting plate 11 is firmly connected to the upper mold 2. Ensure the side pin 9 rotates freely. Check the mold closing positioning component 14 to ensure the mold closing recess 15 and mold closing protrusion 16 are accurately aligned. Then, connect the lower mold cooling pipe 17 and the upper mold cooling pipe 18, and perform a sealing test to ensure there are no leaks.

[0040] Based on the shape of the headrest to be produced and the foaming process requirements, the upper mold 2 of the headrest foaming process is rotated to adjust the connection position between the anti-overflow venting mechanism 6 and the molding recess 4, so that the venting position reaches the optimal state. The prepared foaming material is then injected into the molding cavity formed by the molding recess 4 and the molding protrusion 3. During the foaming process, gas is discharged through the venting channel 7, and the one-way valve prevents material backflow, effectively preventing overflow.

[0041] After the foaming material is injected, the upper mold 2 of the headrest foaming molding is rotated downwards so that the first sealing protrusion 12 and the second sealing protrusion 13 are tightly abutted together. At the same time, the mold closing protrusion 16 is accurately inserted into the mold closing recess 17 to complete the mold closing. After the mold is closed, coolant is introduced through the lower mold cooling pipe 17 and the upper mold cooling pipe 18 to accelerate the cooling and shaping of the headrest. After the headrest is cooled and shaped, the mold is opened and the molded headrest product is taken out.

[0042] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0043] Although this document frequently uses terms such as "lower mold for headrest foaming 1," "upper mold for headrest foaming 2," "molding recess 3," "molding protrusion 4," "adjustable rotating connector 5," "anti-overflow venting mechanism 6," "venting channel 7," "anti-overflow structure 8," "side pin 9," "first connecting rotating plate 10," "second connecting rotating plate 11," "first sealing protrusion 12," "second sealing protrusion 13," "mold closing positioning component 14," "mold closing recess 15," "mold closing protrusion 16," "lower mold cooling pipe 17," and "upper mold cooling pipe 18," the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An adjustable venting mechanism for preventing overflow of foam in a headrest mold for a midday rest desk and chair, comprising a lower headrest foam molding mold (1) and an upper headrest foam molding mold (2), characterized in that, The lower mold (1) for foaming the headrest has a molding recess (3), and the upper mold (2) for foaming the headrest has a molding protrusion (4). The molding recess (3) and the molding protrusion (4) are positioned and matched in shape. An adjustable rotating connector (5) is provided between the lower mold (1) and the upper mold (2). One end of the adjustable rotating connector (5) is connected to the lower mold (1) and the other end is connected to the upper mold (2). The upper mold (2) for foaming the headrest has an anti-overflow venting mechanism (6), which is connected to the molding recess (3).

2. The adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest as described in claim 1, characterized in that, The anti-overflow venting mechanism (6) includes two venting channels (7) disposed in the upper mold (2) for headrest foaming, and the venting channels (7) are provided with an anti-overflow structure (8).

3. The adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest as described in claim 2, characterized in that, The anti-overflow structure (8) is a one-way valve, which is located in the exhaust channel (7) to allow gas to be discharged and prevent material backflow.

4. The adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest as described in claim 3, characterized in that, The adjustable rotating connector (5) includes a side pin (9) disposed between the lower mold (1) and the upper mold (2) of the headrest foaming. A first connecting plate (10) and a second connecting plate (11) are rotatably connected to the side pin (9). The first connecting plate (10) is connected to the lower mold (1) of the headrest foaming, and the second connecting plate (11) is connected to the upper mold (2) of the headrest foaming.

5. The adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest according to claim 4, characterized in that, The lower mold (1) for foaming the headrest is provided with a first sealing protrusion (12).

6. The adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest as described in claim 5, characterized in that, The upper mold (2) for foaming the headrest is provided with a second sealing protrusion (13), and the first sealing protrusion (12) abuts against the second sealing protrusion (13).

7. The adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest according to claim 6, characterized in that, A mold closing and positioning component (14) is provided between the lower mold (1) and the upper mold (2) for foaming the headrest.

8. The adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest according to claim 7, characterized in that, The mold closing positioning component (14) includes a plurality of mold closing recesses (15) disposed in the lower mold (1) for headrest foaming and a plurality of mold closing protrusions (16) in the upper mold (2) for headrest foaming. The mold closing recesses (15) and the mold closing protrusions (16) are positioned correspondingly and have matching shapes.

9. The adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest according to claim 8, characterized in that, The lower mold (1) for foaming the headrest has a lower mold cooling pipe (17).

10. The adjustable venting mechanism for the foam mold of the lunch break desk and chair headrest according to claim 9, characterized in that, The headrest foam molding upper mold (2) has an upper mold cooling pipe (18).

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