Double-component screw dispensing valve

Abstract

The utility model discloses a bi-component screw dispensing valve, one end of the bi-component screw dispensing valve is communicated with the other end of a glue mixing pipe communicated with a glue outlet of a bi-component screw valve, the other end of the glue mixing pipe is communicated with a glue inlet end of a stop mechanism, a dispensing head is arranged on the glue outlet end of the stop mechanism, and a refrigeration body is wrapped on the outer side of the glue mixing pipe. The surface of the side, away from the glue mixing pipe, of the refrigeration body is in contact connection with the refrigeration face of a refrigeration block, the outer side of the refrigeration body is wrapped with a heat conduction shell, a heat insulation gap is formed between the inner wall, spaced from the refrigeration body, of the heat conduction shell and the refrigeration body, and the heat conduction shell is in contact connection with at least one heating component. According to the double-component glue dispensing device, mixed double-component glue liquid is dispensed, the fluidity of the dispensed glue liquid is guaranteed through good refrigeration, meanwhile, the temperature difference between the respective surfaces of the refrigeration block and the heat conduction shell and the surrounding environment is reduced, and the problem that condensate water is generated on the surface of the refrigeration block is solved fundamentally.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a two-component screw dispensing valve. Background Technology

[0002] A dispensing machine is an automated machine that drips or coats fluids onto the surface or interior of a product. AB glue, due to its short curing time and good bonding performance, is widely used in various industrial fields. However, when A and B glues are mixed, they cure very quickly. Therefore, if the equipment cannot promptly discharge the mixed glue, it will clog the dispensing equipment and cause losses. Continuously discharging the mixed glue will also lead to glue waste. To slow down the reaction rate after A and B glues are mixed, a cooling device is usually installed externally. Existing glue cooling devices have a problem: because of internal cooling, the overall temperature of the casing is low. If this temperature is below room temperature, water droplets will form on the casing surface. Excessive condensation of water droplets may flow along the dispensing needle, affecting the dispensing operation, or even dripping onto the product to be processed, causing product scrap. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a two-component screw dispensing valve, which can dispense two-component adhesives and ensure the fluidity of the adhesives, while fundamentally solving the problem of condensation on the surface of the cooling block.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a two-component screw dispensing valve, comprising: a two-liquid screw valve with a mixing tube and a dispensing head, one end of the mixing tube being connected to the dispensing port of the two-liquid screw valve and the other end being connected to the inlet end of a shut-off mechanism, the dispensing head being installed on the dispensing end of the shut-off mechanism, a cooling body being wrapped around the outside of the mixing tube, the surface of the cooling body away from the mixing tube being in contact with the cooling surface of a cooling block, a heat-conducting shell being wrapped around the outside of the cooling body, a heat-insulating gap being formed between the inner wall of the heat-conducting shell and the cooling body, and the heat-conducting shell being in contact with at least one heating element.

[0005] The following are further improvements to the above technical solution:

[0006] 1. In the above scheme, the shut-off mechanism further includes a shut-off valve body mounted on a bracket, a valve needle passing through the shut-off valve body, and a cylinder mounted on the bracket. The glue inlet and glue outlet of the shut-off valve body are respectively connected to the mixing tube and the dispensing head. The piston rod of the cylinder located above the shut-off valve body is connected to the upper end of the valve needle. The lower end of the valve needle, which can move in the vertical direction, is used to open and close the glue outlet channel connecting the mixing tube and the dispensing head.

[0007] 2. In the above scheme, the dual-liquid screw valve is mounted on a base plate, and the bracket of the shut-off mechanism is connected to the base plate.

[0008] 3. In the above scheme, a second cooling body is wrapped around the outside of the dispensing head, and this second cooling body is in contact with and connected to the cooling body.

[0009] 4. In the above scheme, the second refrigeration body is connected to the refrigeration body through mutually embedded grooves and protrusions.

[0010] 5. In the above scheme, the heat-conducting shell extends to the outside of the second refrigeration body.

[0011] 6. In the above scheme, each of the cooling body and the second cooling body has a receiving groove for embedding a glue supply tube and a glue dispensing head, and the heat-conducting shell has a clearance through hole through which the glue supply tube and the glue dispensing head pass.

[0012] 7. In the above scheme, the heat dissipation surface of the cooling block, which is composed of at least two stacked semiconductor cooling chips, is connected to a heat sink.

[0013] 8. In the above scheme, the heat-conducting shell is mounted on the heat sink.

[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0015] This utility model relates to a two-component screw dispensing valve. One end of a mixing tube is connected to the dispensing port of a two-liquid screw valve, and the other end is connected to the inlet of a shut-off mechanism. The dispensing head is installed on the dispensing end of the shut-off mechanism. A cooling body is wrapped around the outside of the mixing tube. The surface of the cooling body away from the mixing tube is in contact with the cooling surface of a cooling block. A heat-conducting shell is wrapped around the outside of the cooling body. The inner wall of the heat-conducting shell, which is spaced apart from the cooling body, forms a heat-insulating gap with the cooling body. The heat-conducting shell is in contact with at least one heating element. While dispensing the mixed two-component adhesive and ensuring the fluidity of the dispensing adhesive through good cooling, this valve also reduces the temperature difference between the surfaces of the cooling block and the heat-conducting shell and their surrounding environment, thus fundamentally solving the problem of condensation on the surface of the cooling block. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the overall structure of the two-component screw dispensing valve of this utility model;

[0017] Appendix Figure 2 This is a partial structural cross-sectional view of the two-component screw dispensing valve of this utility model;

[0018] Appendix Figure 3 This is a partial structural cross-sectional view of the two-component screw dispensing valve of this utility model from a bottom view.

[0019] Appendix Figure 4 This is a partial structural cross-sectional view of the two-component screw dispensing valve of this utility model from a top view perspective.

[0020] In the above attached figures: 100, mixing tube; 200, dispensing head; 300, dual-liquid screw valve; 600, shut-off mechanism; 601, shut-off valve body; 602, valve needle; 603, cylinder; 604, bracket; 700, base plate; 1, refrigeration body; 2, refrigeration block; 3, heat-conducting shell; 31, clearance hole; 4, heat insulation gap; 5, heating element; 6, receiving groove; 7, radiator; 8, second refrigeration body; 91, groove; 92, protrusion. Detailed Implementation

[0021] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0022] Example 1: A two-component screw dispensing valve includes: a two-liquid screw valve 300 with a mixing tube 100 and a dispensing head 200. One end of the mixing tube 100 is connected to the outlet of the two-liquid screw valve 300, and the other end is connected to the inlet of a stop mechanism 600. The dispensing head 200 is installed on the outlet of the stop mechanism 600. A cooling body 1 is wrapped around the outside of the mixing tube 100. The surface of the cooling body 1 away from the mixing tube 100 is in contact with the cooling surface of a cooling block 2. When the two-component adhesive flows out of the screw valve into the mixing tube and mixes before being dispensed through the dispensing head, the cooling body quickly removes the heat inside the mixed adhesive through the cooling block to prevent the adhesive from drying out.

[0023] A heat-conducting shell 3 is wrapped around the outside of the refrigeration body 1. A heat-insulating gap 4 is formed between the inner wall of the heat-conducting shell 3 and the refrigeration body 1, which is spaced apart from the refrigeration body 1. The heat-conducting shell 3 is in contact with at least one heating element 5, which reduces the temperature difference between the surface of the refrigeration block and the heat-conducting shell and its surrounding environment, and solves the problem of condensation on the surface of the refrigeration block from the root.

[0024] The aforementioned shut-off mechanism 600 further includes a shut-off valve body 601 mounted on a bracket 604, a valve needle 602 passing through the shut-off valve body 601, and a cylinder 603 mounted on the bracket 604. The glue inlet and glue outlet of the shut-off valve body 601 are respectively connected to the mixing tube 100 and the dispensing head 200. The piston rod of the cylinder 603 located above the shut-off valve body 601 is connected to the upper end of the valve needle 602. The lower end of the valve needle 602, which can move vertically, is used to open and close the glue outlet channel connecting the mixing tube 100 and the dispensing head 200. The aforementioned dual-liquid screw valve 300 is mounted on a base plate 700, and the bracket 604 of the shut-off mechanism 600 is connected to the base plate 700.

[0025] The outer side of the dispensing head 200 is wrapped with a second cooling body 8, which is in contact with the cooling body 1; the second cooling body 8 and the cooling body 1 are connected by mutually embedded grooves 91 and protrusions 92.

[0026] The aforementioned heat-conducting housing 3 extends to the outside of the second cooling body 8; each of the aforementioned cooling body 1 and the second cooling body 8 has a receiving groove 6 in which a glue supply tube 100 and a glue dispensing head 200 are embedded; the aforementioned heat-conducting housing 3 has a clearance through hole 31 through which the glue supply tube 100 and the glue dispensing head 200 pass.

[0027] The aforementioned heat insulation gap 4 is filled with foamed heat insulation adhesive; the aforementioned heating component 5 is a heating block that contacts the outer surface of the heat-conducting shell 3.

[0028] The aforementioned cooling body 1 is made of copper, and the aforementioned heat-conducting shell 3 is made of aluminum. Aluminum has good thermal conductivity. By actively heating the heat-conducting shell, its surface temperature is not much different from the room temperature. When air comes into contact with the surface of the heat-conducting shell, water molecules will not condense due to excessive temperature difference. In principle, the formation of condensate is avoided, which is more stable and durable than adding a water absorption device.

[0029] Example 2: A two-component screw dispensing valve includes: a dual-liquid screw valve 300 with a mixing tube 100 and a dispensing head 200. One end of the mixing tube 100 is connected to the dispensing port of the dual-liquid screw valve 300, and the other end is connected to the inlet end of a shut-off mechanism 600. The dispensing head 200 is installed on the dispensing end of the shut-off mechanism 600. A cooling body 1 is wrapped around the outside of the mixing tube 100. The surface of the cooling body 1 away from the mixing tube 100 is in contact with the cooling surface of a cooling block 2. A heat-conducting shell 3 is wrapped around the outside of the cooling body 1. A heat-insulating gap 4 is formed between the inner wall of the heat-conducting shell 3 and the cooling body 1, which is spaced apart from the cooling body 1. The heat-conducting shell 3 is in contact with at least one heating element 5.

[0030] Because prolonged cooling by the cooling block can easily produce condensation, which can affect the quality of the adhesive, a heating element is installed. When the temperature difference between the inside and outside is too large, the heating element will be activated to control the temperature difference and effectively suppress the production of condensation.

[0031] The heat dissipation surface of the aforementioned cooling block 2, which is composed of at least two stacked semiconductor cooling chips, is connected to a heat sink 7; the aforementioned heat-conducting housing 3 is installed on the heat sink 7. Both the cooling chips and the heat sink are purchased externally and fall within the scope of existing technology, so they will not be described in detail here.

[0032] The aforementioned heat insulation gap 4 is filled with heat insulation material; the aforementioned heat insulation material is heat insulation cotton.

[0033] The heating element 5 is a heating rod embedded in the heat-conducting housing 3; the heating temperature of the heating element 5 is close to room temperature.

[0034] Both the refrigeration body 1 and the heat-conducting shell 3 are metal bodies with high thermal conductivity; the refrigeration body 1 is a brass body and the heat-conducting shell 3 is a copper shell.

[0035] When using the above-mentioned two-component screw dispensing valve, it can dispense the mixed two-component adhesive and ensure the fluidity of the dispensing adhesive through good cooling, while reducing the temperature difference between the surface of the cooling block and the heat-conducting shell and the surrounding environment, thus solving the problem of condensation on the surface of the cooling block from the root.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A two-component screw dispensing valve, comprising: A dual-liquid screw valve (300) and a dispensing head (200) are installed with a mixing tube (100). One end of the mixing tube (100) is connected to the dispensing port of the dual-liquid screw valve (300), and the other end is connected to the inlet end of a stop mechanism (600). The dispensing head (200) is installed on the dispensing end of the stop mechanism (600). The characteristic feature is that a cooling body (1) is wrapped around the outside of the mixing tube (100). The surface of the cooling body (1) away from the mixing tube (100) is in contact with the cooling surface of a cooling block (2). A heat-conducting shell (3) is wrapped around the outside of the cooling body (1). A heat-insulating gap (4) is formed between the inner wall of the heat-conducting shell (3) and the cooling body (1) at intervals. The heat-conducting shell (3) is in contact with at least one heating element (5).

2. The two-component screw dispensing valve according to claim 1, characterized in that: The shut-off mechanism (600) further includes a shut-off valve body (601) mounted on a bracket (604), a valve needle (602) passing through the shut-off valve body (601), and a cylinder (603) mounted on the bracket (604). The glue inlet and glue outlet of the shut-off valve body (601) are respectively connected to the mixing tube (100) and the dispensing head (200). The piston rod of the cylinder (603) located above the shut-off valve body (601) is connected to the upper end of the valve needle (602). The lower end of the valve needle (602), which can move vertically, is used to open and close the glue outlet channel connecting the mixing tube (100) and the dispensing head (200).

3. The two-component screw dispensing valve according to claim 1, characterized in that: The dual-liquid screw valve (300) is mounted on a base plate (700), and the bracket (604) of the shut-off mechanism (600) is connected to the base plate (700).

4. The two-component screw dispensing valve according to claim 1, characterized in that: The outer side of the dispensing head (200) is wrapped with a second cooling body (8), which is in contact with the cooling body (1).

5. The two-component screw dispensing valve according to claim 4, characterized in that: The second refrigeration body (8) and the refrigeration body (1) are connected by interlocking grooves (91) and protrusions (92).

6. The two-component screw dispensing valve according to claim 5, characterized in that: The heat-conducting shell (3) extends to the outside of the second refrigeration body (8).

7. The two-component screw dispensing valve according to claim 4, characterized in that: The refrigeration body (1) and the second refrigeration body (8) each have a receiving groove (6) for embedding a mixing tube (100) and a dispensing head (200), and the heat-conducting shell (3) has a clearance through hole (31) for the mixing tube (100) and the dispensing head (200) to pass through.

8. The two-component screw dispensing valve according to claim 1, characterized in that: The heat dissipation surface of the cooling block (2), which is composed of at least two stacked semiconductor cooling chips, is connected to a heat sink (7).

9. The two-component screw dispensing valve according to claim 8, characterized in that: The heat-conducting housing (3) is mounted on the radiator (7).

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