Micro-grid venting plug for venting of tire mold

Abstract

The utility model discloses a micro-grid venting plug for venting of a tire mold, which belongs to the technical field of tire molds and comprises a solid part, and the solid part comprises a sleeve shell and a plurality of rib plates. The sleeve shell is in a hollow tubular shape, and the rib plates are located in the sleeve shell. The sleeve shell and the rib plates are formed through a selective laser sintering process and are compact and airtight; unsintered powder particles in gaps between the sleeve shell and the rib plates form a ventilation part, exhaust gaps are formed in the ventilation part, and a plurality of exhaust gaps are communicated to form an exhaust channel. The micro-grid venting plug is manufactured through the 3D printing technology, the entity part is manufactured through the selective laser sintering technology, then the ventilation part is formed, the technology is simple, the structure is stable, the strength is high, the venting plug is not prone to damage, and the maintenance difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tire mold technical field, concretely relates to a micro grid exhaust plug for tire mold exhaust. BACKGROUND

[0002] The exhaust plug is a small exhaust component on the rubber mold, mainly used for exhausting air between the rubber or product surface and the mold. The traditional air hole sleeve is a tubular structure, relying on the inner hole to exhaust, and the rubber material will overflow and flow into the inner hole to form rubber hair during the exhaust process, affecting the tire appearance and wasting raw materials. If the rubber hair breaks, it will be left in the air hole to block the air hole, causing product defects in the next vulcanization.

[0003] In order to avoid air hole blockage, the prior art usually adds a sleeve core inside the air hole sleeve, and the sleeve core has a spring, forming an elastic assembly. During the vulcanization process, when the rubber material does not contact the sleeve core, the air hole is in an open state and can exhaust, and when the rubber material contacts the sleeve core and is extruded, the sleeve core drops and the entire air hole forms a closed state, achieving the effect of air permeability without rubber leakage. However, this type of spring air hole sleeve is small and precise, and is easy to damage, making maintenance difficult.

[0004] In summary, the existing exhaust scheme has high requirements for processing, assembly and maintenance, and the mold cost is also relatively high, which is not suitable for actual production. UTILITY MODEL CONTENTS

[0005] To solve the problems existing in the prior art, the utility model provides a micro grid exhaust plug for tire mold exhaust, which is simple in structure, easy to manufacture and quality easy to control, and improves the exhaust and production efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a micro grid exhaust plug for tire mold exhaust, which comprises a solid part, the solid part comprises a sleeve and a plurality of rib plates, the sleeve is hollow and tubular, the rib plates are located inside the sleeve, the sleeve and the rib plates are formed by selective laser sintering process, which is dense and air-tight, the powder particles in the gap between the sleeve and the rib plates constitute a breathable part, the breathable part has an exhaust gap, and a plurality of exhaust gaps are connected to form an exhaust channel.

[0008] In the above-mentioned micro grid exhaust plug for tire mold exhaust, the diameter of the powder particles is 0.01mm-0.06mm;

[0009] And / or, the length of the rib plate is not less than 1 / 15 of the length of the sleeve;

[0010] And / or, the thickness of the rib plate is not greater than 0.5mm.

[0011] In the micro-grid exhaust plug for tire mold exhaust, the gas outlet end of the sleeve shell is further connected with a transition shell and an extension shell in sequence, and the outer diameter of the extension shell is smaller than the outer diameter of the sleeve shell.

[0012] In the micro-grid exhaust plug for tire mold exhaust, a plurality of rib plates are arranged in parallel and at intervals.

[0013] In the micro-grid exhaust plug for tire mold exhaust, the rib plate is a flat plate.

[0014] In the micro-grid exhaust plug for tire mold exhaust, the rib plate is wavy in the width direction or the length direction.

[0015] In the micro-grid exhaust plug for tire mold exhaust, the thickness difference of the rib plate at both ends in the width direction is not greater than 0.25mm.

[0016] In the micro-grid exhaust plug for tire mold exhaust, the rib plate is a circular ring, and a plurality of rib plates are coaxially arranged.

[0017] In the micro-grid exhaust plug for tire mold exhaust, a plurality of through rib plates are further arranged, the through rib plates extend in the radial direction of the rib plate and connect the rib plates.

[0018] In the micro-grid exhaust plug for tire mold exhaust, the rib plates are arranged in a staggered manner to form a plurality of point-shaped distribution gas permeable parts in the sleeve shell.

[0019] The beneficial effects of the micro-grid exhaust plug for tire mold exhaust are as follows:

[0020] The micro-grid exhaust plug for tire mold exhaust is made by 3D printing technology, and the gas permeable part is formed by using selective laser sintering process to make a solid part, which is simple in process and saves glue;

[0021] The problem that the existing exhaust plug cannot exhaust due to glue overflow is avoided, and the exhaust effect is further improved;

[0022] The solid part structure formed by the rib plate and the sleeve shell is stable and high in strength, the exhaust plug is not easy to be damaged, and the maintenance difficulty is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic view of the overall structure of the first embodiment of the micro-grid exhaust plug for tire mold exhaust of the utility model;

[0024] Figure 2The utility model discloses a partial section view of the microgrid exhaust plug for the tire mold exhaust.

[0025] Figure 3 For Figure 1 The overhead view of the microgrid exhaust plug for the tire mold exhaust.

[0026] Figure 4 The overall structure schematic diagram of the second embodiment of the microgrid exhaust plug for the tire mold exhaust.

[0027] Figure 5 The overall structure schematic diagram of the third embodiment of the microgrid exhaust plug for the tire mold exhaust.

[0028] Figure 6 The overall structure schematic diagram of the fourth embodiment of the microgrid exhaust plug for the tire mold exhaust.

[0029] Figure 7 The overall structure schematic diagram of the fifth embodiment of the microgrid exhaust plug for the tire mold exhaust.

[0030] Figure 8 The overall structure schematic diagram of the sixth embodiment of the microgrid exhaust plug for the tire mold exhaust.

[0031] Figure 9 The overall structure schematic diagram of the seventh embodiment of the microgrid exhaust plug for the tire mold exhaust.

[0032] Figure 10 The overall structure schematic diagram of the eighth embodiment of the microgrid exhaust plug for the tire mold exhaust.

[0033] Figure 11 The overall structure schematic diagram of the ninth embodiment of the microgrid exhaust plug for the tire mold exhaust.

[0034] In the drawings:

[0035] 1 - shell, 2 - transition shell, 3 - extension shell, 4 - air permeable part, 5 - rib plate, 6 - exhaust gap, 7 - powder particles, 8 - through rib plate. DETAILED DESCRIPTION

[0036] In order to facilitate the person skilled in the art to understand, the utility model makes further explanation below in combination with the drawings.

[0037] Please refer to Figure 1 , Figure 2The micro-grid exhaust plug for tire mold exhaust includes a solid part, which includes a sleeve 1 and a plurality of rib plates 5. The sleeve 1 is hollow and tubular, and the cross-sectional shape of the sleeve 1 can be circular or any other desired shape as long as it is hollow inside and the hollow part is open on the two end faces in the length direction of the sleeve 1. The rib plate 5 is located inside the sleeve 1, and the two ends of the rib plate 5 in the width direction are connected with the inner wall of the sleeve 1, and the two sides of the rib plate 5 are not attached to the inner wall of the sleeve 1; the plurality of rib plates 5 are also arranged at intervals. The sleeve 1 and the rib plate 5 are formed by selective laser sintering of powder particles 7, and a plurality of breathable parts 4 are formed in the sleeve 1 after forming, the breathable part 4 is composed of the powder particles 7 which are not completely melted between the rib plate 5 and the sleeve 1, and the breathable part 4 has a plurality of exhaust gaps 6 between the powder particles 7 which are not completely melted, and the plurality of exhaust gaps 6 in the breathable part 4 are connected to form an exhaust channel.

[0038] Specifically, the micro-grid exhaust plug is printed by a 3D printing device; the solid part is given corresponding sintering parameters, and during the printing process, the solid part is a laser sintering area, and the powder particles 7 in the laser sintering area are completely fused and combined and are not breathable; the breathable part 4 is a laser heat affected zone, and the powder particles 7 in the heat affected zone are affected by the heat of the solid part, so that the area of the powder particles 7 close to the solid part is partially melted and adhered to the solid part, and the area away from the solid part still retains the particle profile due to less heat affected, so that the exhaust gap 6 is formed at the position where the powder particles 7 are not melted, and the exhaust gap 6 is distributed in three dimensions and in a mesh in the breathable part 4, thereby forming an exhaust channel between adjacent rib plates 5 and between the rib plate 5 and the sleeve 1 to exhaust.

[0039] Of course, the above parameters are only examples, and specific parameters will be adjusted according to changes in materials and other external factors, which are all known to those skilled in the art or can be obtained through adjustment experiments, so they will not be described here. The diameter of the powder particles 7 is preferably 0.01mm-0.06mm.

[0040] In order to ensure that the breathable part 4 has sufficient air permeability and rubber blocking effect, the length H1 of the rib plate 5 is not less than 1 / 15 of the length H2 of the sleeve 1; the thickness D of a single rib plate 5 is preferably not greater than 0.5mm.

[0041] Further, the gas outlet end of the sleeve 1 is further connected with a transition shell 2 and an extension shell 3 in sequence, further guiding the gas to be discharged; at the same time, the outer diameter of the extension shell 3 is smaller than the outer diameter of the sleeve 1, and only the sleeve 1 is connected with the exhaust hole of the mold, which can reduce the processing technology of the micro-grid exhaust plug and improve the assembly precision of the micro-grid exhaust plug and the mold.

[0042] Please refer to Figure 1 , Figure 3The first embodiment of the micro-grid exhaust plug for tire mold exhaust provided by the utility model, the rib plate 5 is a flat plate, the cross section of the rib plate 5 is a long strip-shaped rectangle, and the width is much greater than the thickness; a plurality of rib plates 5 are arranged in parallel and at equal intervals. The air-permeable part 4 is formed between the adjacent two rib plates 5 and between the rib plate 5 and the inner wall of the sleeve shell 1; the air-permeable part 4 is also similar to a flat plate as a whole, and the thickness W is not greater than 0.5 mm, so that the powder particles 7 in the air-permeable part 4 are affected by heat during the forming process of the rib plate 5 and the sleeve shell 1, and the exhaust gap 6 has the ideal effect of air permeation without glue overflow.

[0043] Please refer to Figure 4 The second embodiment of the micro-grid exhaust plug for tire mold exhaust provided by the utility model, the rib plate 5 is wavy in the width direction and has wave crests and wave troughs; the air-permeable part 4 between the adjacent two rib plates 5 and between the rib plate 5 and the inner wall of the sleeve shell 1 is also similar to a wavy plate as a whole, and the thickness W of the air-permeable part 4 is not greater than 0.5 mm.

[0044] Please refer to Figure 5 The third embodiment of the micro-grid exhaust plug for tire mold exhaust provided by the utility model, the cross section of the rib plate 5 is similar to a trapezoid, that is, the thicknesses of the two ends of the rib plate 5 in the width direction are inconsistent; for example, the thickness of one end of the rib plate 5 in the width direction is A, and the thickness of the other end is B, and the difference between the thicknesses of the two ends is not greater than 0.25 mm; the air-permeable part 4 between the adjacent two rib plates 5 and between the rib plate 5 and the inner wall of the sleeve shell 1 is plate-shaped as a whole, and the thickness W is not greater than 0.5 mm.

[0045] Please refer to Figure 6 The fourth embodiment of the micro-grid exhaust plug for tire mold exhaust provided by the utility model, the rib plate 5 is circular, and a plurality of rib plates 5 are coaxially arranged; in the radial direction, the distance between the adjacent two rib plates 5 is equal, and the distance W is not greater than 0.5 mm. Correspondingly, the air-permeable part 4 is also annular.

[0046] Please refer to Figure 7 The fifth embodiment of the micro-grid exhaust plug for tire mold exhaust provided by the utility model is different from the fourth embodiment in that two through rib plates 8 are further arranged, the through rib plates 8 extend in the radial direction of the rib plate 5, and are used for strengthening the bonding strength between the rib plates 5; the two through rib plates 8 are symmetrically arranged, and the air-permeable part 4 is arc-shaped and plate-shaped.

[0047] Please refer to Figure 8 The sixth embodiment of the micro-grid exhaust plug for tire mold exhaust provided by the utility model is different from the fourth embodiment in that three through rib plates 8 are arranged, the through rib plates 8 extend in the radial direction and are uniformly distributed in the circumferential direction, and are used for strengthening the bonding strength between the rib plates 5.

[0048] Please refer to Figure 9The seventh embodiment of the micro-grid exhaust plug for tire mold exhaust provided by the utility model, the rib plate 5 is wavy in the width direction, the rib plate 5 is staggered, and a plurality of breathable parts 4 in point distribution are formed in the sleeve shell 1. The cross section of the breathable part 4 can be rectangular, rhombic, circular or the like, and the maximum distance between two points in the cross section of the breathable part 4 perpendicular to the exhaust direction is not greater than 0.5 mm; for example, if the breathable part 4 is rhombic, the distance between two opposite angles is not greater than 0.5 mm; if the breathable part 4 is circular, the diameter of the circle is not greater than 0.5 mm.

[0049] Please refer to Figure 10 The eighth embodiment of the micro-grid exhaust plug for tire mold exhaust provided by the utility model is different from the seventh embodiment in that the rib plate 5 is a flat plate.

[0050] Please refer to Figure 11 The ninth embodiment of the micro-grid exhaust plug for tire mold exhaust provided by the utility model, the rib plate 5 is wavy in the length direction, has a wave crest and a wave trough; the breathable part 4 between the two adjacent rib plates 5 and between the rib plate 5 and the inner wall of the sleeve shell 1 is also similar to a wavy plate.

[0051] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can be changed and varied in various ways. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A microcellular vent plug for use in venting a tire mold, characterized by, The entity part comprises a sleeve shell (1) and a plurality of rib plates (5); the sleeve shell (1) is a hollow tube, and the rib plates (5) are located inside the sleeve shell (1); the sleeve shell (1) and the rib plates (5) are formed by a selective laser sintering process and are dense and air-tight; the gap between the sleeve shell (1) and the rib plates (5) is filled with unsintered powder particles (7) to form an air-permeable part (4), and the air-permeable part (4) has exhaust gaps (6) therein; and a plurality of the exhaust gaps (6) are connected to form an exhaust channel.

2. A microcell vent plug for use in venting a tire mold according to claim 1, wherein The diameter of the powder particles (7) is 0.01-0.06 mm; And / or, the length of the rib plate (5) is not less than 1 / 15 of the length of the sleeve shell (1); And / or, the thickness of the rib plate (5) is not greater than 0.5 mm.

3. A microcell vent plug for use in venting a tire mold according to claim 1, wherein The exhaust end of the sleeve shell (1) is further connected with a transition shell (2) and an extension shell (3) in sequence, and the outer diameter of the extension shell (3) is smaller than that of the sleeve shell (1).

4. A microcell vent plug for use in venting a tire mold according to claim 1, wherein A plurality of the rib plates (5) are arranged side by side and at intervals.

5. A microcell vent plug for use in venting a tire mold according to claim 4, wherein The rib plate (5) is a flat plate.

6. A microcell vent plug for use in venting a tire mold according to claim 4, wherein The rib plate (5) is wavy in the width direction or the length direction.

7. A microcell vent plug for use in venting a tire mold according to claim 4, wherein The thickness difference of the rib plate (5) at the two ends in the width direction is not greater than 0.25 mm.

8. A microcell vent plug for use in venting a tire mold according to claim 1, wherein The rib plate (5) is a circular ring, and a plurality of the rib plates (5) are coaxially arranged.

9. A microcell vent plug for use in venting a tire mold according to claim 8, wherein, A plurality of through rib plates (8) are further provided, the through rib plates (8) extend in the radial direction of the rib plate (5) and connect the rib plates (5).

10. A microcell vent plug for use in venting a tire mold according to claim 1, wherein The rib plates (5) are arranged alternately to form the air-permeable part (4) in a dot-like distribution in the sleeve shell (1).

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