Drip-proof dispensing device for curing agent

Abstract

The utility model discloses a kind of anti-dripping solidifying agent production with split charging device, it is related to liquid split charging equipment technical field, including split charging machine, split charging machine includes controller and storage box, the discharge port of storage box is fixedly connected with filling device, filling device flange is connected with connecting flange, connecting flange is fixedly connected with guide head away from the side of filling device, guide head is provided with anti-dripping structure, due to the setting of round angle, and polytetrafluoroethylene coating protruding guide head extends along the round angle to opening outside, compared with prior art as shown in the drawing, the setting of round angle cooperates with the polytetrafluoroethylene coating extending guide head inner wall to eliminate residual dead angle, avoid solidifying agent to be adhered in the outlet end of guide head, and, utilize the circular arc surface of round angle to change liquid surface tension distribution, so that the liquid film of low viscosity solidifying agent cannot form "bridge" in edge, promote liquid film to shrink into drop and separate, reduce dripping frequency, solve the problem of the appearance of product influenced by existing filling head.

Description

Technical Field

[0001] This utility model relates to the field of liquid dispensing equipment technology, and in particular to a drip-proof dispensing device for the production of curing agents. Background Technology

[0002] Curing agents, also known as hardeners, ripening agents, or stabilizers, are substances or mixtures that enhance or control the curing reaction. Resin curing is an irreversible process that occurs in thermosetting resins through chemical reactions such as condensation, ring closure, addition, or catalysis. Curing is accomplished by adding curing (crosslinking) agents. Curing agents are essential additives; they are required in adhesives, coatings, and castings, otherwise epoxy resins cannot cure. The type of curing agent significantly affects the mechanical properties, heat resistance, water resistance, and corrosion resistance of the cured product. In curing agent processing, the shaped curing agent needs to be dispensed into different bottles, and the dispensing must be uniform; therefore, dispensing equipment is required.

[0003] Currently, existing anti-drip curing agent dispensing devices have been found to have at least the following technical problems in actual use;

[0004] When dispensing high-viscosity liquid curing agents, some of the curing agent adheres to the inner wall of the filling head after being sprayed out of the pipeline due to the surface tension of the liquid. This can cause dripping during intermittent dispensing. Current solutions aim to reduce surface adhesion, for example, by using superhydrophobic / low surface energy coatings. Materials with a surface energy <20mN / m (such as Teflon or diamond-like carbon (DLC) coatings) can significantly reduce liquid adhesion (high-viscosity liquids with a contact angle >10° with a heating wire are prone to rolling off). However, in practical use, existing filling heads, when dispensing low-viscosity curing agents, cannot detach due to surface tension equilibrium, forming a "liquid film." "Residue" (when the hardener comes into contact with the coating, if the contact angle is between 90° and 120°, the liquid may form a "spreading liquid film" on the coating surface). The liquid film residue is not completely static and will drip slowly over time (especially when there is vibration or temperature change). For low viscosity hardeners with a guide head of less than 5 cP, the drip rate per head can reach 0.5-2 mL per hour. The residual liquid film drips onto the outer wall of the packaging barrel or the barrel opening, which will form stains that are difficult to remove (especially since the hardener is prone to oxidation and discoloration after contact with air, such as amine hardeners which will turn yellow). In the humid environment of the southeast coast, the stains will absorb moisture and dust to form "black spots". Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a drip-proof dispensing device for the production of curing agents. This solves the problem that existing filling heads, when used in actual use, cannot detach due to surface tension imbalance during the filling of low-viscosity curing agents, resulting in liquid film residue. This residual liquid film drips onto the outer wall or mouth of the packaging barrel, forming stains that are difficult to remove and affecting the appearance of the product.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A drip-proof dispensing device for producing curing agents includes a dispensing machine, which comprises a controller, a weighing platform, a lifting support base, and a storage box. The storage box is mounted on the lifting support base. A filling device is fixedly connected to the outlet of the storage box. A drip-proof mechanism is detachably connected to the end of the filling device furthest from the storage box. The detachable connection is specifically a flange connection. The drip-proof mechanism includes a guide head. The diameter of the guide head body is 15mm-30mm, and the diameter of the guide head outlet is 3mm-8mm. The ratio of the diameter of the guide head outlet to the diameter of the guide head body is... For example, the ratio is 1:3-1:5, the length of the guide head's discharge end is 10mm-20mm, the ratio of the length of the guide head's discharge end to the length of the guide head's main body is 1:5-1:10, the inner wall of the guide head's main body has a micro-taper of 1°-3°, the diameter gradually decreases from the feed end to the discharge end, and the connection between the rounded corner and the inner wall is smooth without steps, the end of the guide head away from the filling device is the discharge end, the discharge end of the guide head is rounded, and a first arc structure is formed at the discharge end of the guide head, the inner wall of the guide head's discharge end is coated with polytetrafluoroethylene coating.

[0008] Preferred: The PTFE coating protrudes from the discharge end of the guide head.

[0009] Preferably, the radius of curvature of the first arc structure is 0.4mm, 0.5mm or 0.8mm. When used for dispensing low-viscosity curing agent, the radius of curvature is R=0.4mm. When used for dispensing medium-viscosity curing agent, the radius of curvature is R=0.5mm. When used for dispensing high-viscosity curing agent, the radius of curvature is R=0.8mm. The radius tolerance of the curvature is ±0.05mm.

[0010] Preferred: The first arc structure is machined along the entire circumference of the discharge end edge to form a 360° closed arc, without local right angles or gaps, and the roughness of the rounded corner is Ra≤0.05μm.

[0011] Preferably, the end of the guide head away from the discharge port is fixedly connected to a connecting flange, and the end of the filling device away from the storage box is fixedly connected to a flange, and the flange is compatible with the connecting flange.

[0012] Preferably, an electrical control box is fixedly connected to the surface of the guide head, the electrical control box is electrically connected to the controller, a heating wire is embedded in the inner side of the guide head, the heating wire is electrically connected to the electrical control box, the electrical control box includes a relay, a drive circuit and a terminal block, and the heating wire includes a nickel-chromium alloy wire and an insulating layer, with both ends of the nickel-chromium alloy wire fixedly connected to the terminal block.

[0013] Preferably, the anti-drip mechanism can be replaced by an anti-tension mechanism, which includes a guide head, a first arc structure and a polytetrafluoroethylene coating. The discharge end of the guide head is rounded and forms the first arc structure. The discharge end of the guide head is also provided with three grooves.

[0014] Preferably, each of the three grooves has a second arc structure on each side.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This application controls the filling device to discharge material via a controller. The material is discharged into the curing agent container through a guide head. The liquid discharged from the guide head is guided by a polytetrafluoroethylene (PTFE) coating. Due to the rounded corners and the PTFE coating extending outward from the guide head along the rounded corners, compared to existing technologies, the rounded corners combined with the PTFE coating extending into the inner wall of the guide head eliminate residual dead corners, preventing the curing agent from sticking to the outlet end of the guide head. Furthermore, the rounded corners alter the surface tension distribution of the liquid, preventing the liquid film of low-viscosity curing agent from forming a "bridge" at the edge, causing the liquid film to shrink into droplets and detach, reducing the number of drips. This solves the problem that existing filling heads, when filling low-viscosity curing agents, cannot detach due to surface tension imbalance, resulting in residual liquid film. This residual liquid film drips onto the outer wall or opening of the packaging container, forming stains that are difficult to remove and affecting the product's appearance. Attached Figure Description

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0018] Figure 1 Diagram of the existing guide head and PTFE coating structure;

[0019] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 3 This is a structural diagram of the storage box and filling device of this utility model;

[0021] Figure 4 This is a cross-sectional structural diagram of the guide head and fillet of this utility model;

[0022] Figure 5 This is a three-dimensional cross-sectional view of the guide head and groove of this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the guide head and electrical control box of this utility model.

[0024] Legend: 1. Filling machine; 2. Controller; 3. Storage box; 4. Filler; 5. Guide head; 6. PTFE coating; 7. Connecting flange; 8. First arc structure; 9. Electrical control box; 10. Heating wire; 11. Second arc structure; 12. Groove. Detailed Implementation

[0025] This application provides a drip-proof dispensing device for producing curing agents, which effectively solves the problem that existing filling heads, when filling low-viscosity curing agents, cannot detach due to surface tension imbalance, resulting in liquid film residue. This residual liquid film drips onto the outer wall or opening of the packaging barrel, forming stains that are difficult to remove and affecting the product's appearance.

[0026] The system includes a filling machine 1, which comprises a controller 2, a weighing platform, a lifting support base, and a storage box 3. The storage box 3 is mounted on the lifting support base. A filling device 4 is fixedly connected to the outlet of the storage box 3. A drip-proof mechanism is detachably connected to the end of the filling device 4 furthest from the storage box 3. The detachable connection is specifically a flange connection. The drip-proof mechanism includes a guide head 5. The diameter of the main body of the guide head 5 is 15mm-30mm, and the diameter of the outlet end of the guide head 5 is 3mm-8mm. The ratio of the diameter of the outlet end of the guide head 5 to the diameter of the main body of the guide head 5 is 1:3-1. :5, the length of the discharge end of the guide head 5 is 10mm-20mm, the ratio of the length of the discharge end of the guide head 5 to the length of the main body of the guide head 5 is 1:5-1:10, the inner wall of the main body of the guide head 5 has a micro-taper of 1°-3°, the diameter gradually decreases from the feed end to the discharge end, and the connection between the rounded corner and the inner wall is smooth without steps, the end of the guide head 5 away from the filling device 4 is the discharge end, the discharge end of the guide head 5 is rounded, and a first arc structure 8 is formed at the discharge end of the guide head 5, the inner wall of the discharge end of the guide head 5 is coated with polytetrafluoroethylene coating 6.

[0027] The polytetrafluoroethylene coating 6 protrudes from the discharge end of the guide head 5.

[0028] The radius of curvature of the first arc structure 8 is 0.4mm, 0.5mm or 0.8mm. When it is used to dispense low-viscosity curing agent, the radius of curvature of the fillet 8 is 0.4mm. When it is used to dispense medium-viscosity curing agent, the radius of curvature of the fillet 8 is 0.5mm. When it is used to dispense high-viscosity curing agent, the radius of curvature of the fillet 8 is 0.8mm. The radius tolerance of the fillet 8 is ±0.05mm.

[0029] The first arc structure 8 is machined along the entire circumference of the discharge end edge to form a 360° closed arc with no local right angles or gaps. The roughness of the fillet 8 is Ra≤0.05μm.

[0030] The end of the guide head 5 furthest from the discharge port is fixedly connected to a connecting flange 7, and the end of the filling device 4 furthest from the storage box 3 is fixedly connected to a flange, which is compatible with the connecting flange 7.

[0031] An electrical control box 9 is fixedly connected to the surface of the guide head 5. The electrical control box 9 is electrically connected to the controller 2. A heating wire 10 is embedded in the inner side of the guide head 5. The heating wire 10 is electrically connected to the electrical control box 9. The electrical control box includes a relay, a drive circuit and a terminal block. The heating wire includes a nickel-chromium alloy wire and an insulating layer. Both ends of the nickel-chromium alloy wire are fixedly connected to the terminal block.

[0032] The anti-drip mechanism can be replaced by an anti-tension mechanism. The anti-tension mechanism includes a guide head 5, a first arc structure 8, and a polytetrafluoroethylene coating 6. The discharge end of the guide head 5 is rounded and forms the first arc structure 8. The discharge end of the guide head 5 is also provided with three grooves 12.

[0033] Each of the three grooves 12 has a second arc structure 11 on each side.

[0034] Example 1

[0035] like Figure 2 , Figure 3 and Figure 4 As shown, in this application, the filling device 4 discharges material via the controller 2. The material is discharged into the curing agent container through the guide head 5. The liquid discharged from the guide head 5 is guided by the polytetrafluoroethylene coating 6. Due to the setting of the rounded corner 8, and the polytetrafluoroethylene coating 6 protruding from the guide head 5 and extending outward from the opening along the rounded corner 8, compared to... Figure 1 The existing technology shown has the following advantages: the rounded corner 8, combined with the polytetrafluoroethylene coating 6 extending from the inner wall of the guide head 5, eliminates residual dead corners and prevents the curing agent from sticking to the outlet end of the guide head 5. Furthermore, the rounded surface of the rounded corner 8 changes the surface tension distribution of the liquid, preventing the liquid film of the low-viscosity curing agent from forming a "bridge" at the edge, causing the liquid film to shrink into droplets and detach, reducing the number of drips by more than 80%.

[0036] Example 2

[0037] like Figure 4 and Figure 6 As shown, when this application is used in cold regions, an electrical control box 9 and a heating wire 10 can be added to the surface of the guide head 5 to raise the temperature of the guide head 5 by 10-20 degrees, improve the fluidity of the curing agent, keep the curing agent in a "low resistance" state, and further improve the anti-drip performance of the guide head 5 in cold regions.

[0038] Example 3

[0039] like Figure 2 , Figure 3 and Figure 5 As shown, in this application, three grooves 12 can be formed on the basis of the rounded corner 8, and a second rounded corner 13 can be formed at the corner of the groove 12. The rounded corner 8 reduces dripping by changing the surface tension distribution, while the three grooves 12 can further "physically divide" the liquid film: when the material is discharged, the residual liquid film will be cut off by the channel, and it will not be able to form a continuous "tension bridge" at the edge of the discharge end, causing the liquid film to shrink into independent droplets and quickly detach.

[0040] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A drip-proof curing agent dispensing device, comprising a dispensing machine (1), said dispensing machine (1) including a controller (2) and a storage box (3), characterized in that, The outlet of the storage box (3) is fixedly connected to a filling device (4), and the end of the filling device (4) away from the storage box (3) is detachably connected to an anti-drip mechanism. The anti-drip mechanism includes a guide head (5), the end of the guide head (5) away from the filler (4) is the discharge end, the discharge end of the guide head (5) is rounded, and a first arc structure (8) is formed at the discharge end of the guide head (5), and the inner wall of the discharge end of the guide head (5) is coated with a polytetrafluoroethylene coating (6).

2. The drip-proof dispensing device for producing curing agent as described in claim 1, characterized in that: The polytetrafluoroethylene coating (6) protrudes from the discharge end of the guide head (5).

3. The drip-proof dispensing device for producing curing agents as described in claim 2, characterized in that: The radius of curvature of the first arc structure (8) is 0.4 mm, 0.5 mm or 0.8 mm.

4. The drip-proof dispensing device for producing curing agent as described in claim 3, characterized in that: The first arc structure (8) is processed along the entire circumference of the discharge end edge to form a 360° closed arc without any local right angles or gaps.

5. The drip-proof dispensing device for producing curing agent as described in claim 4, characterized in that: The guide head (5) is fixedly connected to a connecting flange (7) at the end away from the discharge port, and the filling device (4) is fixedly connected to a flange at the end away from the storage box (3). The flange is compatible with the connecting flange (7).

6. The drip-proof dispensing device for producing curing agent as described in claim 5, characterized in that: An electrical control box (9) is fixedly connected to the surface of the guide head (5). The electrical control box (9) is electrically connected to the controller (2). A heating wire (10) is embedded in the inner side of the guide head (5). The heating wire (10) is electrically connected to the electrical control box (9).

7. The drip-proof dispensing device for producing curing agent as described in claim 1, characterized in that: The anti-drip mechanism can be replaced with an anti-tension mechanism; The tension-resistant mechanism includes a guide head (5), a first arc structure (8), and a polytetrafluoroethylene coating (6). The discharge end of the guide head (5) is rounded and forms a first arc structure (8). The discharge end of the guide head (5) is also provided with three grooves (12).

8. The drip-proof dispensing device for producing curing agent as described in claim 7, characterized in that: Each of the three grooves (12) has a second arc structure (11) on each side.

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