Die for high-strength office chair armrest

Abstract

The utility model provides a die for a high-strength office chair armrest. The larger the pressure in an armrest die cavity is, the closer the sliding airtight plug to the threaded column is. When the sliding airtight plug slides over the input end of the L-shaped exhaust channel, air in the handrail die cavity is exhausted to the outside through the filtering film, the vent hole, the adjusting channel and the L-shaped exhaust channel, and when the pressure in the handrail die cavity is smaller than or equal to a preset value, the sliding airtight plug is close to the bearing block and blocks the input end of the L-shaped exhaust channel. That is to say, on one hand, the pressure control mechanism can ensure that the pressure in the armrest mold cavity is at the preset value, so that it is ensured that the armrest mold cavity has large pressure, it is ensured that injection molding raw materials keep high density, the bubble amount in the injection molding raw materials is reduced, and the structural strength of the office chair armrest subjected to injection molding is easily ensured. And on the other hand, the pressure control mechanism can prevent the pressure in the handrail die cavity from being too large, and the handrail die cavity is prevented from deforming under the too large pressure.

Description

Technical Field

[0001] The utility model relates to the field of office chair armrest production, in particular to a mold for high-strength office chair armrests. Background Art

[0002] Office chairs refer to various chairs equipped for the convenience of work in daily work and social activities. Office partners divide office chairs into narrow and broad sense. The narrow sense of office chairs refers to the backrest chairs that people sit on when they work at the desk in a sitting position. The broad sense of office chairs refers to all chairs used in offices. The armrests of office chairs are used to place arms or hands. Traditional office chair armrests, such as the technical solution disclosed in the patent with application number CN202120407456.5 and invention name office chair armrests, are detachable armrests that need to be assembled. In order to increase the structural strength of the office chair armrests, one-piece injection-molded office chair armrests have appeared on the market.

[0003] However, in the conventional one-piece injection-molded office chair armrest, bubbles may exist inside the one-piece injection-molded office chair armrest during the injection molding process because the pressure in the mold cavity of the injection mold is too low, which may reduce the structural strength of the one-piece injection-molded office chair armrest. Utility Model Content

[0004] Based on this, it is necessary to provide a high-strength office chair armrest mold to address the technical problem that the pressure in the mold cavity of the traditional one-piece injection-molded office chair armrest is too low during the injection molding process.

[0005] A mold for a high-strength office chair armrest, the mold for the high-strength office chair armrest comprising: an upper mold, a lower mold and a pressure control mechanism;

[0006] The upper mold and the lower mold are detachably connected; an upper mold cavity is provided on the upper mold, and a lower mold cavity is provided on the lower mold, and the upper mold cavity and the lower mold cavity are connected to form an armrest mold cavity; an injection nozzle is provided on the upper mold, and an injection channel is provided in the upper mold, and the injection nozzle is connected with the upper mold cavity through the injection channel; an adjustment channel and an L-shaped exhaust channel are provided on the upper mold, one end of the adjustment channel is connected with the upper mold cavity, and the other end of the adjustment channel is connected with the outside world; one end of the L-shaped exhaust channel is connected with the middle area of ​​the adjustment channel, and the other end of the L-shaped exhaust channel is connected with the outside world; an internal thread is provided on the inner wall of the adjustment channel away from the upper mold cavity;

[0007] The pressure control mechanism is arranged in the regulating channel, and the pressure control mechanism includes an extrusion component and an regulating component; the extrusion component includes a filter membrane, a receiving block, a sliding airtight plug and a compression spring; the filter membrane is arranged at one end of the injection channel close to the upper mold cavity, the filter membrane abuts against the receiving block, and a vent hole is opened through the middle area of ​​the receiving block; the receiving block is accommodated in the regulating channel and connected to the upper mold, the sliding airtight plug abuts against one end of the receiving block away from the filter membrane, and one end of the compression spring is connected to one end of the sliding airtight plug away from the receiving block; the input end of the L-shaped exhaust channel is located in the middle area of ​​the compression spring accommodated in the regulating channel and communicates;

[0008] The adjusting assembly comprises a rotating handle, a rotating rod, a threaded column, a connecting rod, a rotating disk and an extrusion block; the rotating handle is connected to one end of the rotating rod, and the end of the rotating rod away from the rotating handle is inserted in the adjusting channel and connected to one end of the threaded column; the threaded column is adapted to the internal thread, the threaded column is inserted in the part of the adjusting channel where the internal thread is provided and is screwed to the upper mold; the end of the threaded column away from the rotating rod is connected to the connecting rod, and the end of the connecting rod away from the threaded column is connected to the rotating disk; a convex-shaped rotating groove is provided at one end of the extrusion block, the rotating disk is adapted to the convex-shaped rotating groove, the rotating disk is inserted in the convex-shaped rotating groove and is rotatably connected to the extrusion block; the end of the extrusion block away from the threaded column is connected to the end of the compression spring away from the sliding air-tight plug.

[0009] In one embodiment, the filter membrane is a microporous filter membrane.

[0010] In one embodiment, the filtration membrane is an ultrafiltration membrane.

[0011] In one embodiment, the rotating handle is a straight handle.

[0012] In one embodiment, the rotating handle is a cross-shaped handle.

[0013] In one of the embodiments, the rotating handle is provided with anti-slip grooves.

[0014] In one of the embodiments, an anti-slip cover is provided on the rotating handle.

[0015] In one of the embodiments, the anti-slip sleeve is provided with anti-slip grooves.

[0016] In one embodiment, the anti-slip sleeve is a soft rubber sleeve.

[0017] In one embodiment, the anti-slip cover is a soft silicone cover.

[0018] During the working process of the mold of the high-strength office chair armrest, the upper mold and the lower mold are connected together so that the upper mold cavity and the lower mold cavity are connected to form the armrest mold cavity. The injection molding raw material is injected into the armrest mold cavity through the injection nozzle and the injection molding channel. As the injection operation proceeds, more and more liquid raw materials are injected into the armrest mold cavity. The pressure in the armrest mold cavity is also getting higher and higher. When the pressure in the armrest mold cavity is greater than the preset value, the sliding airtight plug begins to move along the injection molding channel and squeezes the compression spring to move. The greater the pressure in the armrest mold cavity, the closer the sliding airtight plug is to the threaded column. When the sliding airtight plug slides over the input end of the L-shaped exhaust channel, the air in the armrest mold cavity is discharged to the outside through the filter membrane, the vent, the adjustment channel and the L-shaped exhaust channel. When the pressure in the armrest mold cavity is less than or equal to the preset value, the sliding airtight plug is close to the receiving block and the sliding airtight plug blocks the input end of the L-shaped exhaust channel. At this time, the air pressure on the sliding airtight plug is equal to the elastic force of the compression spring. That is to say, on the one hand, the pressure control mechanism can ensure that the pressure in the armrest mold cavity is at a preset value, thereby ensuring that there is a large pressure in the armrest mold cavity, ensuring that the injection molding material maintains a high density, reducing the amount of bubbles in the injection molding material, and calmly ensuring the structural strength of the injection molded office chair armrest. On the other hand, the pressure control mechanism can prevent the pressure in the armrest mold cavity from being too high, and prevent the armrest mold cavity from deforming under excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a mold for a high-strength office chair armrest in one embodiment;

[0020] Figure 2 It is a schematic diagram of a partially enlarged structure of a mold of a high-strength office chair armrest in one embodiment. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth so as to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below. In the description of the utility model, it is necessary to understand that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or position relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0026] Please also read Figure 1 to Figure 2 The utility model provides a mold 10 for a high-strength office chair armrest. The mold 10 for the high-strength office chair armrest includes an upper mold 100 , a lower mold 200 and a pressure control mechanism 300 .

[0027] The upper mold 100 and the lower mold 200 are detachably connected. An upper mold cavity 101 is provided on the upper mold 100, and a lower mold cavity 102 is provided on the lower mold 200. The upper mold cavity 101 and the lower mold cavity 102 are connected to form an armrest mold cavity. An injection nozzle 110 is provided on the upper mold 100, and an injection channel 103 is provided in the upper mold 100. The injection nozzle 110 is connected to the upper mold cavity 101 through the injection channel 103. An adjustment channel 104 and an L-shaped exhaust channel 105 are provided on the upper mold 100. One end of the adjustment channel 104 is connected to the upper mold cavity 101, and the other end of the adjustment channel 104 is connected to the outside world. One end of the L-shaped exhaust channel 105 is connected to the middle area of ​​the adjustment channel 104, and the other end of the L-shaped exhaust channel 105 is connected to the outside world. An internal thread is provided on the inner wall of the part of the adjustment channel 104 away from the upper mold cavity 101.

[0028] The pressure control mechanism 300 is arranged in the regulating channel 104, and the pressure control mechanism 300 includes an extrusion assembly 310 and an adjustment assembly 320. The extrusion assembly 310 includes a filter membrane 311, a receiving block 312, a sliding airtight plug 313 and a compression spring 314. The filter membrane 311 is arranged at one end of the injection channel 103 close to the upper mold cavity 101, the filter membrane 311 abuts against the receiving block 312, and a vent 301 is provided through the middle area of ​​the receiving block 312. The receiving block 312 is accommodated in the regulating channel 104 and connected to the upper mold 100, the sliding airtight plug 313 abuts against one end of the receiving block 312 away from the filter membrane 311, and one end of the compression spring 314 is connected to one end of the sliding airtight plug 313 away from the receiving block 312. In this embodiment, the filter membrane 311 is a microporous filter membrane. In another embodiment, the filter membrane 311 is an ultrafiltration membrane. The input end of the L-shaped exhaust channel 105 is located in the middle area of ​​the portion of the compression spring 314 received in the regulating channel 104. The filter membrane 311 can filter out the injection molding material and only allow air to pass through.

[0029] The adjustment assembly 320 includes a rotating handle 321, a rotating rod 322, a threaded column 323, a connecting rod 324, a rotating disk 325, and an extrusion block 326. The rotating handle 321 is connected to one end of the rotating rod 322, and the end of the rotating rod 322 away from the rotating handle 321 is inserted into the adjustment channel 104 and connected to one end of the threaded column 323. The threaded column 323 is adapted to the internal thread, and the threaded column 323 is inserted into the part of the adjustment channel 104 where the internal thread is provided and is screwed to the upper mold 100. The end of the threaded column 323 away from the rotating rod 322 is connected to the connecting rod 324, and the end of the connecting rod 324 away from the threaded column 323 is connected to the rotating disk 325. One end of the extrusion block 326 is provided with a convex rotating groove 302, and the rotating disk 325 is adapted to the convex rotating groove 302, and the rotating disk 325 is inserted into the convex rotating groove 302 and is rotatably connected to the extrusion block 326. One end of the extrusion block 326 away from the threaded column 323 is connected to one end of the compression spring 314 away from the sliding airtight plug 313 .

[0030] In order to facilitate the rotation of the rotating handle 321, in one embodiment, the rotating handle 321 is a straight handle. In another embodiment, the rotating handle 321 is a cross-shaped handle. Further, in this embodiment, the rotating handle 321 is provided with anti-slip grooves to increase the anti-slip performance of the rotating handle 321, thereby increasing the friction between the rotating handle 321 and the hand. In another embodiment, the rotating handle 321 is provided with an anti-slip cover. Specifically, the anti-slip cover is provided with anti-slip grooves to increase the anti-slip performance of the anti-slip cover. The anti-slip cover is a soft rubber cover. In another embodiment, the anti-slip cover is a soft silicone cover. In this way, the rotating handle 321 is easy to rotate, and the working stability of the adjustment component 320 is increased.

[0031] During the operation of the mold of the high-strength office chair armrest 10, the upper mold 100 and the lower mold 200 are connected together, so that the upper mold cavity 101 and the lower mold cavity 102 are connected to form an armrest mold cavity. The injection molding material is injected into the armrest mold cavity through the injection nozzle 110 and the injection channel 103. As the injection operation proceeds, more and more liquid raw materials are injected into the armrest mold cavity. The pressure in the armrest mold cavity is also increasing. When the pressure in the armrest mold cavity is greater than the preset value, the sliding airtight plug 313 begins to move along the injection channel 103 and squeezes the compression spring 314 to move. The greater the pressure in the armrest mold cavity, the closer the sliding airtight plug 313 is to the threaded column 323. When the sliding airtight plug 313 slides over the input end of the L-shaped exhaust channel 105, the air in the armrest mold cavity is discharged to the outside through the filter membrane 311, the vent hole 301, the regulating channel 104 and the L-shaped exhaust channel 105. When the pressure in the armrest mold cavity is less than or equal to the preset value, the sliding airtight plug 313 moves close to the receiving block 312 to block the input end of the L-shaped exhaust channel 105. At this time, the air pressure on the sliding airtight plug 313 is equal to the elastic force of the compression spring 314. In other words, on the one hand, the pressure control mechanism 300 can ensure that the pressure in the armrest mold cavity is at the preset value, thereby ensuring that the armrest mold cavity has a large pressure, ensuring that the injection molding material maintains a high density, reducing the amount of bubbles in the injection molding material, and calmly ensuring the structural strength of the injection molded office chair armrest. On the other hand, the pressure control mechanism 300 can prevent the pressure in the armrest mold cavity from being too high, and prevent the armrest mold cavity from being deformed under excessive pressure.

[0032] It should be noted that when the preset value in the armrest mold cavity needs to be increased, the handle 321 can be turned to rotate the rotating rod 322, thereby driving the threaded column 323 to rotate. The threaded column 323 moves downward while rotating, so as to drive the extrusion block 326 to move downward through the connecting rod 324 and the rotating disk 325, and compress the compression spring 314. The elastic force of the compression spring 314 received by the sliding airtight plug 313 is increased, thereby increasing the pressure in the armrest mold cavity required to push the sliding airtight plug 313 to move.

[0033] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0034] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A mold for a high-strength office chair armrest, characterized in that: include: Upper mold, lower mold and pressure control mechanism; The upper mold and the lower mold are detachably connected; an upper mold cavity is provided on the upper mold, and a lower mold cavity is provided on the lower mold, and the upper mold cavity and the lower mold cavity are connected to form an armrest mold cavity; an injection nozzle is provided on the upper mold, and an injection channel is provided in the upper mold, and the injection nozzle is connected with the upper mold cavity through the injection channel; an adjustment channel and an L-shaped exhaust channel are provided on the upper mold, one end of the adjustment channel is connected with the upper mold cavity, and the other end of the adjustment channel is connected with the outside world; one end of the L-shaped exhaust channel is connected with the middle area of ​​the adjustment channel, and the other end of the L-shaped exhaust channel is connected with the outside world; an internal thread is provided on the inner wall of the adjustment channel away from the upper mold cavity; The pressure control mechanism is arranged in the regulating channel, and the pressure control mechanism includes an extrusion component and an regulating component; the extrusion component includes a filter membrane, a receiving block, a sliding airtight plug and a compression spring; the filter membrane is arranged at one end of the injection channel close to the upper mold cavity, the filter membrane abuts against the receiving block, and a vent hole is opened through the middle area of ​​the receiving block; the receiving block is accommodated in the regulating channel and connected to the upper mold, the sliding airtight plug abuts against one end of the receiving block away from the filter membrane, and one end of the compression spring is connected to one end of the sliding airtight plug away from the receiving block; the input end of the L-shaped exhaust channel is located in the middle area of ​​the compression spring accommodated in the regulating channel and communicates; The adjusting assembly comprises a rotating handle, a rotating rod, a threaded column, a connecting rod, a rotating disk and an extrusion block; the rotating handle is connected to one end of the rotating rod, and the end of the rotating rod away from the rotating handle is inserted in the adjusting channel and connected to one end of the threaded column; the threaded column is adapted to the internal thread, the threaded column is inserted in the part of the adjusting channel where the internal thread is provided and is screwed to the upper mold; the end of the threaded column away from the rotating rod is connected to the connecting rod, and the end of the connecting rod away from the threaded column is connected to the rotating disk; a convex-shaped rotating groove is provided at one end of the extrusion block, the rotating disk is adapted to the convex-shaped rotating groove, the rotating disk is inserted in the convex-shaped rotating groove and is rotatably connected to the extrusion block; the end of the extrusion block away from the threaded column is connected to the end of the compression spring away from the sliding air-tight plug.

2. The mold of the high-strength office chair armrest according to claim 1, characterized in that: The filter membrane is a microporous filter membrane.

3. The mold of the high-strength office chair armrest according to claim 1, characterized in that: The filtration membrane is an ultrafiltration membrane.

4. The mold of the high-strength office chair armrest according to claim 1, characterized in that: The rotating handle is a straight handle.

5. The mold of the high-strength office chair armrest according to claim 1, characterized in that: The rotating handle is a cross-shaped handle.

6. The mold of the high-strength office chair armrest according to claim 1, characterized in that: The rotating handle is provided with anti-slip patterns.

7. The mold of the high-strength office chair armrest according to claim 1, characterized in that: An anti-slip cover is arranged on the rotating handle.

8. The mold of the high-strength office chair armrest according to claim 7, characterized in that: The anti-slip sleeve is provided with anti-slip patterns.

9. The mold of the high-strength office chair armrest according to claim 7, characterized in that: The anti-slip cover is a soft rubber cover.

10. The mold of the high-strength office chair armrest according to claim 7, characterized in that: The anti-slip cover is a soft silicone cover.

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