Glue coating device

Abstract

The present invention relates to the technical field of glue coating equipment, and specifically discloses a glue coating device, which includes a glue melting box, a glue coating shaft, a support assembly and an air supply mechanism, wherein the glue melting box is used to contain glue; the glue coating shaft is rotatably connected to the glue melting box, and is used to apply glue to a workpiece; the support assembly is arranged on the outer side of the bottom surface of the glue melting box, and an axial hole connected to the inner cavity of the glue melting box is formed inside, and the glue coating shaft is rotatably arranged in the axial hole; a vent hole is provided on the support assembly, and the vent hole is connected to the axial hole; the air supply mechanism is connected to the vent hole, and is used to introduce gas with a pressure greater than atmospheric pressure into the vent hole. The air supply mechanism of the glue coating device provided by the present invention introduces gas with a pressure greater than atmospheric pressure into the vent hole, and the vent hole is connected to the axial hole, so that the gas will be filled into the axial hole, thereby filling the gap between the hole wall of the axial hole of the support assembly and the glue coating shaft, preventing glue from flowing into the gap, achieving a gas sealing effect, and avoiding the occurrence of glue leakage.

Description

Technical Field

[0001] The present invention relates to the technical field of glue coating equipment, in particular to a glue coating device. Background Art

[0002] The glue coating device is a mechanism that heats solid thermoplastic rubber to liquid state and evenly coats the liquid rubber on the surface of the plate. In the prior art, the glue coating device includes a glue supply box, a glue coating shaft and a glue supply wheel seat. The glue supply box is used to provide glue to the glue coating shaft, and the glue coating shaft is rotatably connected to the glue supply wheel seat through a bearing. Since the heating temperature of thermoplastic rubber is 150-200°C, the maximum speed of the glue coating shaft of the glue coating device can reach 292r / min. The glue coating shaft is subjected to a certain radial thrust during operation. During the long-term operation of the glue coating device, the bearings of the glue coating shaft are worn in a high temperature environment, causing the glue coating shaft to tilt when subjected to force, and a gap is generated with the sealing gasket sleeved on the outside of the glue coating shaft. The glue can easily flow downward from the gap, pass through the bearing, and flow to the outside of the device, thereby causing glue leakage.

[0003] In the prior art, in order to prevent glue from flowing into the bearing and causing the bearing to lock, an annular glue storage tank surrounding the bearing is provided on the rubber supply wheel seat, and a vent hole connected to the outside is provided at the bottom of the annular glue storage tank. The glue falls into the annular glue storage tank provided on the rubber supply wheel seat, and the glue is discharged to the outside of the device through the vent hole at the bottom of the annular glue storage tank, so that the glue leaked inside is discharged in time, and the accumulation of too much glue in the annular glue storage tank is avoided, which causes the bearing to lock, thereby protecting the glue coating device. However, the glue coating device in the prior art can only discharge glue and quickly detect glue leakage, and cannot effectively prevent the occurrence of glue leakage. Summary of the invention

[0004] The purpose of the present invention is to provide a glue coating device to avoid glue leakage.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A glue coating device, comprising:

[0007] A glue melting box for containing glue;

[0008] A glue coating shaft, rotatably connected to the glue melting box, for coating the glue on the workpiece;

[0009] A support assembly is arranged on the outer side of the bottom surface of the melt box, and an axial hole is formed inside the support assembly to communicate with the inner cavity of the melt box, and the glue coating shaft is rotatably arranged in the axial hole; a vent hole is opened on the support assembly, and the vent hole is communicated with the axial hole;

[0010] The air supply mechanism is connected to the vent hole and is used for introducing gas with a pressure greater than atmospheric pressure into the vent hole.

[0011] Preferably, the glue coating device further comprises:

[0012] A bearing is arranged in the shaft hole, and the rubber-coated shaft passes through the bearing;

[0013] The vent hole comprises an air outlet end and an air inlet end, the air inlet end is communicated with the air supply mechanism, the air outlet end is communicated with the shaft hole, and the air outlet end is located above the bearing.

[0014] Preferably, the glue coating device further comprises:

[0015] A shaft sleeve is arranged in the shaft hole, the rubber coating shaft is rotatably passed through the shaft sleeve, an annular protrusion is arranged on the outer periphery of the shaft sleeve, an annular groove is opened on the inner wall of the support assembly, and the annular protrusion is accommodated in the annular groove.

[0016] Preferably, a sleeve hole is formed on the sleeve, and the sleeve hole penetrates the wall of the sleeve along the radial direction of the sleeve.

[0017] Preferably, the portion of the rubber-coated shaft that is inserted into the shaft sleeve is a penetration portion, and an annular air groove is provided on the outer peripheral surface of the penetration portion.

[0018] Preferably, the annular air groove is arranged opposite to the shaft sleeve hole.

[0019] Preferably, the support assembly comprises:

[0020] The support comprises a support body and a support ring arranged on the outer periphery of the support body, the vent hole is arranged through the support ring, and the axial hole is arranged through the support body.

[0021] Preferably, the glue coating device further comprises a bracket;

[0022] The support assembly also includes:

[0023] The support seat is connected to the bracket, the axial hole passes through the support seat, part of the support body is passed through the axial hole of the support seat, the lower end surface of the support ring abuts against the upper end surface of the support seat, and the air hole of the support extends to the support seat to be connected with the air supply mechanism.

[0024] Preferably, a receiving groove is provided on the outer side of the bottom surface of the melt box, and the support assembly also includes a pad, which is received in the receiving groove, the axial hole passes through the pad, the upper end surface of the pad abuts against the top wall of the receiving groove, and the lower end surface of the pad abuts against the upper end surface of the support ring.

[0025] Preferably, an upper annular half groove is formed on the lower surface of the pad, and a lower annular half groove is formed on the upper surface of the support, and the upper annular half groove and the lower annular half groove form the annular groove.

[0026] Beneficial effects of the present invention: the air supply mechanism of the glue coating device provided by the present invention introduces gas with a pressure greater than atmospheric pressure into the vent hole, and the vent hole is connected to the axial hole, so the gas will be filled into the axial hole, thereby filling the gap between the hole wall of the axial hole of the support assembly and the glue coating shaft, preventing glue from flowing into the gap, achieving the effect of gas sealing, and avoiding the occurrence of glue leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a structural schematic diagram of a glue coating device provided in an embodiment of the present invention without being connected to an air supply mechanism;

[0028] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0029] Figure 3 It is a schematic diagram of the structure of the glue coating device provided in an embodiment of the present invention.

[0030] In the figure:

[0031] 1. Glue melting box;

[0032] 2. Support assembly;

[0033] 21, vent hole; 211, upper longitudinal hole; 212, transverse groove; 213, lower longitudinal hole; 214, transverse hole;

[0034] 22. support; 221. support body; 222. support ring;

[0035] 23. Support seat; 24. Pad; 25. Annular groove; 26. Shaft hole;

[0036] 3. Glue coating shaft; 31. Annular air groove;

[0037] 4. Gas supply mechanism;

[0038] 5. Bearings;

[0039] 6. shaft sleeve; 61. annular protrusion; 62. shaft sleeve hole;

[0040] 7. Trachea connector. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It is also necessary to explain that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all.

[0042] Some directional words are defined in the present invention. Unless otherwise specified, the directional words used, such as "up", "down", "left", "right", "inside" and "outside", are used to facilitate understanding and therefore do not constitute a limitation on the scope of protection of the present invention.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] This embodiment provides a glue coating device for coating glue on a plate-like workpiece such as a wooden board, but is not limited thereto and can also be used to coat glue on other workpieces to avoid glue leakage.

[0046] like Figure 1-Figure 3As shown, the glue coating device provided in this embodiment includes a glue melting box 1, a glue coating shaft 3 and a support assembly 2. The glue melting box 1 is used to contain glue, and a heating component can be provided in the glue melting box 1 to melt the thermoplastic rubber into glue. The glue coating shaft 3 is rotatably connected to the glue melting box 1, and is used to apply glue to the workpiece. The support assembly 2 is arranged on the outer side of the bottom surface of the glue melting box 1, and an axial hole 26 connected to the inner cavity of the glue melting box 1 is formed inside, and the glue coating shaft 3 is rotatably arranged in the axial hole 26. A vent hole 21 is opened on the support assembly 2, and the vent hole 21 is connected to the axial hole 26. The air supply mechanism 4 is connected to the vent hole 21, and is used to pass gas into the vent hole 21, wherein the pressure of the gas is greater than the atmospheric pressure.

[0047] The air supply mechanism 4 introduces gas with a pressure greater than atmospheric pressure into the vent hole 21. The vent hole 21 is connected to the shaft hole 26, so the gas will be filled into the shaft hole 26, thereby filling the gap between the hole wall of the shaft hole 26 of the support assembly 2 and the glue-coating shaft 3, preventing glue from flowing into the gap, achieving a gas sealing effect, and preventing glue leakage. Preferably, the gas pressure can be twice the atmospheric pressure, but is not limited to this. The pressure can also be other values. In order to achieve a better gas sealing effect, the gas pressure can be not less than the sum of the atmospheric pressure and the glue pressure. The air supply mechanism 4 can be a mechanism such as an air pump that can provide gas with a pressure greater than atmospheric pressure.

[0048] This embodiment uses gas sealing glue, and does not need to use a sealing ring for sealing, which solves the problem that the sealing ring is aged when working in a high temperature environment, and the sealing ring needs to be replaced frequently, thereby reducing work efficiency. Of course, in other embodiments, a sealing ring can also be provided between the glue-coating shaft 3 and the support assembly 2, so as to achieve double sealing of the sealing ring and gas.

[0049] like Figure 1 As shown, preferably, a receiving groove with an opening facing downward is opened on the outer side of the bottom surface of the melt box 1, and the support assembly 2 includes a pad 24, which is received in the receiving groove, and the axial hole 26 passes through the pad 24, and the upper end surface of the pad 24 abuts against the top wall of the receiving groove, thereby preventing the support assembly 2 from moving upward.

[0050] Preferably, the support assembly 2 further includes a support 22, which is located at the lower side of the pad 24 and can support the pad 24. The support 22 includes a support body 221 and a support ring 222 arranged on the outer periphery of the support body 221, the shaft hole 26 is arranged through the support body 221, and the bearing 5 is installed in the shaft hole 26 of the support body 221. The vent hole 21 is arranged through the support ring 222, and the lower end surface of the pad 24 abuts against the upper end surface of the support ring 222.

[0051] like Figure 2As shown, preferably, in order to facilitate the processing of the vent hole 21 located on the support ring 222, the vent hole 21 located on the support ring 222 includes an upper longitudinal hole 211 and a transverse groove 212, and the upper longitudinal hole 211 penetrates the support ring 222 in the vertical direction. The transverse groove 212 is arranged horizontally, and the transverse groove 212 is a U-shaped through groove, and the two ends of the transverse groove 212 along the radial direction of the shaft hole 26 are open, so that one end of the transverse groove 212 is connected with the upper longitudinal hole 211, and the other end is connected with the shaft hole 26. The upper end of the transverse groove 212 is open, and since the lower end surface of the pad 24 abuts against the upper end surface of the support ring 222, it can prevent gas from escaping from the opening at the upper end of the transverse groove 212.

[0052] like Figure 1 As shown, the glue coating device also includes a bracket, and the melt box 1 can be installed on the bracket. The support assembly 2 also includes a support seat 23, which is located between the support 22 and the pad 24 and is used to support the support 22. The support seat 23 is connected to the bracket, and the lower end surface of the support ring 222 abuts against the upper end surface of the support seat 23, so as to achieve the installation of the support assembly 2 and prevent the installation of the support assembly 2 from moving downward. The shaft hole 26 is set through the support seat 23, and part of the support body 221 is penetrated in the shaft hole 26 of the support seat 23. The vent hole 21 of the support 22 extends to the support seat 23 to communicate with the air supply mechanism 4.

[0053] like Figure 2 As shown, preferably, the vent hole 21 located on the support seat 23 includes a lower longitudinal hole 213 and a transverse hole 214 that are connected to each other. The lower longitudinal hole 213 is vertically arranged, and the lower longitudinal hole 213 is arranged opposite to the upper longitudinal hole 211. The transverse hole 214 extends radially along the axial hole 26, one end of the transverse hole 214 is connected to the lower end of the lower longitudinal hole 213, and the other end of the longitudinal hole extends in a direction away from the center line of the axial hole 26.

[0054] like Figure 2 As shown, in order to facilitate ventilation into the vent hole 21 , the glue coating device also includes an L-shaped air pipe joint 7 , one end of which is inserted into the vent hole 21 , and the other end is connected to the air supply mechanism 4 .

[0055] like Figure 1 As shown, in order to reduce the friction of the glue coating shaft 3, the glue coating device also includes a bearing 5, the bearing 5 is arranged in the shaft hole 26, and the glue coating shaft 3 passes through the bearing 5.

[0056] The vent hole 21 includes an air outlet and an air inlet, the air inlet is connected to the air supply mechanism 4, and the air outlet is connected to the shaft hole 26. It can be understood that in this embodiment, the end of the transverse hole 214 away from the shaft hole 26 is the air inlet, and the end of the transverse groove 212 close to the shaft hole 26 is the air outlet. In order to prevent glue from entering the bearing 5 and solve the locking problem of the bearing 5 caused by glue leakage from the root, the air outlet is located above the bearing 5. Due to the obstruction of the gas layer above the bearing 5, the purpose of preventing glue from flowing into the bearing 5 is achieved.

[0057] Preferably, the glue coating device further comprises a sleeve 6, which is disposed in the shaft hole 26, and the glue coating shaft 3 is rotatably disposed in the sleeve 6. The glue coating shaft 3 does not directly contact the support assembly 2, so the wear of the support assembly 2 can be reduced, thereby reducing the frequency of replacement of the support assembly 2. Since the processing cost of the sleeve 6 is low and the replacement efficiency is high, the increase of the sleeve 6 can reduce the workpiece cost and the replacement time cost. The gas filled in the vent hole 21 can be filled into the gap between the outer periphery of the sleeve 6 and the inner wall of the shaft hole 26, and the gap between the inner periphery of the sleeve 6 and the glue coating shaft 3, thereby preventing the glue from flowing out of the above two gaps.

[0058] To facilitate fixing the sleeve 6, an annular protrusion 61 is provided on the outer periphery of the sleeve 6, and an annular groove 25 is provided on the inner wall of the support assembly 2. The annular protrusion 61 is accommodated in the annular groove 25. It can be understood that the inner wall of the support assembly 2 is the hole wall of the shaft hole 26.

[0059] To facilitate the processing of the annular groove 25 , an upper annular half groove is formed on the lower surface of the backing plate 24 , and a lower annular half groove is formed on the upper surface of the support 22 . The upper annular half groove and the lower annular half groove form the annular groove 25 .

[0060] Preferably, in order to allow sufficient gas to enter between the sleeve 6 and the rubber-coated shaft 3, a sleeve hole 62 is provided on the sleeve 6, and the sleeve hole 62 penetrates the wall of the sleeve 6 along the radial direction of the sleeve 6. It can be understood that the sleeve hole 62 can penetrate the wall on one side of the sleeve 6, or can penetrate the walls on two opposite sides of the sleeve 6. Preferably, the sleeve hole 62 is provided on the annular protrusion 61, so as to reduce the influence of the sleeve hole 62 on the strength of the sleeve 6.

[0061] The portion of the glue coating shaft 3 that is inserted into the shaft sleeve 6 is a penetration portion. In order to evenly distribute the gas in the gap between the shaft sleeve 6 and the glue coating shaft 3, an annular gas groove 31 is provided on the outer peripheral surface of the penetration portion.

[0062] In order to ensure the speed at which the gas enters the gap between the sleeve 6 and the glue-coating shaft 3 , the annular gas groove 31 is arranged opposite to the sleeve hole 62 .

[0063] In order to further improve the uniformity of gas distribution in the gap between the sleeve 6 and the glue-coated shaft 3 , two or more sleeve holes 62 may be evenly distributed along the axial direction of the sleeve 6 .

[0064] like Figure 3 As shown by the middle arrow, after the gas flows out of the gas pipe joint 7, it enters the vent hole 21, and then enters the gap between the sleeve 6 and the support assembly 2, and the sleeve hole 62 from the gas outlet end of the vent hole 21. The gas flowing into the sleeve hole 62 is evenly filled into the gap between the glue coating shaft 3 and the sleeve 6 along the annular gas groove 31 of the glue coating shaft 3. After the gas enters each gap, it escapes upward, and the glue in the glue melting box 1 cannot flow downward from the gap, thereby solving the glue leakage problem of the glue coating mechanism.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A glue coating device, characterized in that: include: A glue melting box (1), used for containing glue; A glue coating shaft (3) rotatably connected to the glue melting box (1) and used for coating the glue on the workpiece; The support assembly (2) is arranged on the outer side of the bottom surface of the melt box (1), and has an axial hole (26) formed therein which is in communication with the inner cavity of the melt box (1), and the glue coating shaft (3) is rotatably arranged in the axial hole (26); the support assembly (2) is provided with a vent hole (21), and the vent hole (21) is in communication with the axial hole (26); An air supply mechanism (4) connected to the vent hole (21) and used for introducing gas having a pressure greater than atmospheric pressure into the vent hole (21); A shaft sleeve (6) is arranged in the shaft hole (26); the rubber coating shaft (3) is rotatably inserted into the shaft sleeve (6); an annular protrusion (61) is arranged on the outer periphery of the shaft sleeve (6); an annular groove (25) is formed on the inner wall of the support assembly (2); and the annular protrusion (61) is accommodated in the annular groove (25); The shaft sleeve (6) is provided with a shaft sleeve hole (62), and the shaft sleeve hole (62) penetrates the wall of the shaft sleeve (6) in the radial direction of the shaft sleeve (6); The portion of the rubber coating shaft (3) that is inserted into the shaft sleeve (6) is a insertion portion, and an annular air groove (31) is provided on the outer peripheral surface of the insertion portion; A bearing (5) is disposed in the shaft hole (26), and the rubber-coated shaft (3) passes through the bearing (5); The vent hole (21) comprises an air outlet end and an air inlet end, the air inlet end is in communication with the air supply mechanism (4), the air outlet end is in communication with the shaft hole (26), and the air outlet end is located above the bearing (5).

2. The gluing device according to claim 1, characterized in that: The annular air groove (31) is arranged opposite to the shaft sleeve hole (62).

3. The gluing device according to claim 1, characterized in that: The support assembly (2) comprises: The support (22) comprises a support body (221) and a support ring (222) arranged on the periphery of the support body (221), the vent hole (21) being arranged through the support ring (222), and the shaft hole (26) being arranged through the support body (221).

4. The gluing device according to claim 3, characterized in that: The glue coating device also includes a bracket; The support assembly (2) further comprises: A support seat (23) is connected to the bracket, the axial hole (26) passes through the support seat (23), a portion of the support body (221) is inserted into the axial hole (26) of the support seat (23), the lower end surface of the support ring (222) abuts against the upper end surface of the support seat (23), and the vent hole (21) of the support seat (22) extends to the support seat (23) to communicate with the air supply mechanism (4).

5. The gluing device according to claim 3, characterized in that: The bottom surface of the melt box (1) is provided with a receiving groove, and the support assembly (2) further comprises a pad (24), wherein the pad (24) is received in the receiving groove, and the axial hole (26) passes through the pad (24), the upper end surface of the pad (24) abuts against the top wall of the receiving groove, and the lower end surface of the pad (24) abuts against the upper end surface of the support ring (222).

6. The gluing device according to claim 5, characterized in that: An upper annular half groove is formed on the lower surface of the pad (24), and a lower annular half groove is formed on the upper surface of the support (22), wherein the upper annular half groove and the lower annular half groove form the annular groove (25).

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