Dispensing needle cylinder capable of rapid exhaust

Abstract

The utility model belongs to the dispensing needle cylinder technical field, specifically disclose a dispensing needle cylinder of quick exhaust, including the cylinder and piston block in the inside of cylinder, the inner wall of cylinder is provided with exhaust structure, there is a gap between exhaust structure and piston block, exhaust structure can discharge the gas in glue when piston block moves to the tail and head of cylinder, the utility model discloses the cooperation of exhaust structure and piston block that are set up in the inner wall of cylinder makes piston block in the moving process in the cylinder, the gap between piston block and exhaust structure is used to discharge the gas in glue, when glue is divided and packed, the exhaust structure of cylinder head can discharge the original gas in needle cylinder in the early stage of division and packing, so that part of the glue or fluid that cannot centrifugal defoaming can be smoothly divided and packed, improve glue division and packing efficiency, thereby obtain the precise and reliable dispensing device, reduce the difficulty of dispensing process and control.

Description

Technical Field

[0001] This utility model relates to the field of dispensing syringe technology, specifically a dispensing syringe with rapid air exhaust. Background Technology

[0002] In the current field of dispensing, in order to facilitate the use of adhesives or other fluids in automated production, it is necessary to dispense the adhesives or other fluids, that is, to load the fluids into dispensing syringes, and to form dispensing devices with pistons, back covers, head plugs, etc., in order to work with dispensing machines and achieve automated operation. Dispensing syringes are an important component of dispensing devices.

[0003] In existing technologies, during the dispensing of fluid into syringes, air is inevitably introduced to varying degrees due to operational limitations. Typically, the dispensed fluid is placed in a degassing machine, its cap closed, and centrifuged to remove air trapped within the adhesive and any air introduced during dispensing, ensuring adhesive quality and dispensing accuracy. However, this centrifugal degassing process increases manufacturing costs to some extent. Furthermore, due to limitations in the composition of different adhesives or fluids, some adhesives cannot be subjected to centrifugal degassing.

[0004] Similarly, in air-driven dispensing equipment, the gas remaining in the glue is compressed as the air source pushes the piston down. When the air source stops, the reverse release of the compressed gas causes the piston to rebound.

[0005] To ensure timely venting of adhesive or fluid gases, conventional practices have employed pistons with appropriate clearances, such as straight-walled pistons and wire-drawing pistons. Wire-drawing pistons feature wire-drawing textures on the piston blade and tail fin. However, in practical applications, the smaller blade size of wire-drawing pistons increases the difficulty of process control. Straight-walled pistons, due to their larger gap with the syringe, result in more adhesive residue during dispensing, leading to waste. Therefore, we need to propose a dispensing syringe with rapid venting capability to solve these problems, thereby improving adhesive dispensing efficiency, resulting in a precise and reliable dispensing device, and reducing the difficulty of dispensing processes and control. Utility Model Content

[0006] The purpose of this invention is to provide a dispensing syringe with rapid air exhaust, which can improve the dispensing efficiency of adhesive, thereby obtaining a precise and reliable dispensing device, reducing the difficulty of dispensing process and control, and solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a dispensing syringe with rapid venting capability, comprising a syringe body and a piston block inside the syringe body. The inner wall of the syringe body is provided with a venting structure, and there is a gap between the venting structure and the piston block. The venting structure can vent the gas in the glue when the piston block moves to the tail and head of the syringe body. A rear cover is detachably installed at the tail of the syringe body, and a head plug is detachably installed at the head of the syringe body.

[0008] Preferably, the exhaust structure is configured with multiple exhaust slots, which are equidistantly distributed on the inner wall of the cylinder.

[0009] Preferably, the exhaust grooves are configured in segments, with multiple exhaust grooves evenly distributed on the inner walls of both ends of the cylinder.

[0010] Preferably, the texture of the exhaust groove is set to one of the following: brushed texture, fine texture, and leather texture.

[0011] Preferably, the piston block includes a bullet head, the upper end of which is integrally formed with a ring plate, the ring plate having a reinforcing mechanism inside, the outer wall of the ring plate near the bullet head having an integrally formed edge, the outer wall of the ring plate having an arc surface, and a gap being left between the arc surface and the inner wall of the cylinder.

[0012] Preferably, the reinforcement mechanism includes a support column integrally formed on the upper end of the bullet head, and a reinforcement plate is fixed to the outer wall of the support column at equal angles.

[0013] Preferably, the head plug includes a plug cover, the inside of which is integrally formed with a stud, and the head of the cylinder is provided with a needle, the side wall of which is provided with a threaded hole for screwing the stud.

[0014] Preferably, the rear cover includes a cover plate that covers the upper end of the cylinder, the two ends of the cover plate are provided with hooks, and the tail of the cylinder is integrally formed with a folded edge for the hooks to fasten.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model, through the cooperation of the venting structure set on the inner wall of the cylinder and the piston block, allows the piston block to move within the cylinder and use the gap between the piston block and the venting structure to expel the gas in the glue. During glue dispensing, the venting structure at the head of the cylinder can expel the original gas in the syringe at the initial dispensing stage, allowing some glue or fluid that cannot be centrifuged and degassed to be dispensed smoothly. When some glue inevitably needs to undergo centrifugation and degassed operation, the venting structure at the tail of the cylinder can effectively expel the degassed gas, improving the glue dispensing efficiency, thereby obtaining a precise and reliable dispensing device and reducing the difficulty of dispensing process and control.

[0017] 2. This utility model uses a detachable head plug and a cylinder body to seal and protect the cylinder body when it is not in use, thus preventing the inside of the cylinder body from being contaminated by the external environment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

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

[0020] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0021] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B;

[0022] Figure 5 This is a schematic diagram of the installation structure of the reinforcement mechanism of this utility model;

[0023] Figure 6 This is a schematic diagram of the piston block structure of this utility model;

[0024] Figure 7 This is a cross-sectional structural diagram of the rear cover of this utility model during installation.

[0025] In the diagram: 1. Cylinder; 11. Folded edge; 12. Needle; 13. Screw hole; 2. Back cover; 21. Cover plate; 22. Positioning hole; 23. Hanging lug; 24. Round hole; 3. Head plug; 31. Plug cap; 32. Stud; 4. Exhaust structure; 5. Piston block; 51. Ring plate; 52. Support column; 53. Reinforcing plate; 54. Bullet head; 55. Edge; 56. Curved surface. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-7This utility model provides a technical solution: a dispensing syringe with rapid venting capability, comprising a syringe body 1 and a piston block 5 inside the syringe body 1. The inner wall of the syringe body 1 is provided with a venting structure 4, and there is a gap between the venting structure 4 and the piston block 5. The venting structure 4 can vent the gas in the glue when the piston block 5 moves to the tail and head of the syringe body 1. The tail of the syringe body 1 is detachably equipped with a rear cover 2, and the head of the syringe body 1 is detachably equipped with a head plug 3.

[0028] By cooperating with the venting structure 4 set on the inner wall of the cylinder 1, the piston block 5 moves within the cylinder 1, and the gas in the glue is discharged through the gap between the piston block 5 and the venting structure 4. During glue dispensing, the venting structure 4 at the head of the cylinder 1 can discharge the original gas in the syringe at the initial dispensing stage, allowing some glue or fluid that cannot be centrifuged and degassed to be dispensed smoothly. When some glue inevitably needs to be centrifuged and degassed, the venting structure 4 at the tail of the cylinder 1 can effectively discharge the degassed gas, improving the glue dispensing efficiency, thereby obtaining a precise and reliable dispensing device and reducing the difficulty of dispensing process and control.

[0029] The exhaust structure 4 is configured with multiple exhaust grooves, which are equidistantly distributed on the inner wall of the cylinder 1. The exhaust grooves are made by etching patterns on the cylinder forming mold, so that the inner wall of the cylinder has texture features. When the piston block moves to the exhaust groove, the gas in the glue is discharged by using the gap between the piston block and the exhaust groove.

[0030] The exhaust channels are configured in segments, with multiple exhaust channels evenly distributed on the inner walls of both ends of the cylinder 1, such as... Figure 2 In the diagram, 'a' and 'b' represent two venting channels. These channels are the venting passages between the piston block and the cylinder. When the adhesive is dispensed from bottom to top through the cylinder, the adhesive pushes the piston under external force. At this time, venting channel 'b' prioritizes venting the initial air between the piston block and the cylinder, and the piston continues to move upward until the dispensing is complete. Venting channel 'a', on the other hand, can vent the gas during the dispensing process. In dispensing practice, the air pressure is input to the dispensing syringe through an adapter, driving the piston to push the adhesive for dispensing. The smooth inner wall of the cylinder between venting channels 'a' and 'b' effectively seals the piston block and the cylinder, preventing adhesive residue and piston rebound during dispensing.

[0031] The texture of the exhaust groove is set to one of the following: brushed texture, fine texture, and leather texture. Among them, brushed texture is a texture formed on the surface of a material through mechanical processing or chemical treatment, which usually presents as uniform straight lines or intersecting lines with obvious directionality; leather texture is a texture that imitates the texture of natural leather, which is usually formed on the surface of the material through mold pressing or chemical etching to create a leather-like texture; fine texture usually refers to small and delicate textures, which are processed by hand such as micro-carving and fine grinding.

[0032] The piston block 5 includes a bullet head 54. An annular plate 51 is integrally formed on the upper end of the bullet head 54. A reinforcing mechanism is provided inside the annular plate 51. An edge 55 is integrally formed on the outer wall of the annular plate 51 near the bullet head 54. An arc surface 56 is provided on the outer wall of the annular plate 51 so that both ends of the annular plate 51 can abut against the inner wall of the cylinder 1 to seal the piston block 5 with the inner wall of the cylinder 1. A gap is left between the arc surface 56 and the inner wall of the cylinder 1 so that when the piston block 5 moves to the exhaust groove, the gas in the glue can be discharged using this gap.

[0033] The reinforcement mechanism includes a support column 52 integrally formed on the upper end of the bullet head 54. A reinforcement plate 53 is fixed at equal angles on the outer wall of the support column 52. The reinforcement plate 53 and the support column 52 are used to increase the stability of the piston block 5 moving inside the cylinder 1.

[0034] The head plug 3 includes a plug cap 31, and a stud 32 is integrally formed inside the plug cap 31. A needle 12 is provided at the head of the cylinder 1. A screw hole 13 is provided on the side wall of the needle 12 for screwing the stud 32, so that the head plug 3 and the needle 12 are detachable to prevent the glue from curing or leaking when not in use. When dispensing glue, the head plug 3 needs to be removed in order to install the dispensing needle so that the glue can be accurately applied to the target position through the needle.

[0035] The rear cover 2 includes a cover plate 21 that covers the upper end of the cylinder 1. The two ends of the cover plate 21 are provided with hooks 23. The tail of the cylinder 1 is integrally formed with a folded edge 11 for the hooks 23 to fasten. This makes the rear cover 2 and the cylinder 1 detachable. It is easy to separate the rear cover 2 from the cylinder 1 when applying glue. When not applying glue, the rear cover 2 can be used to seal and protect the cylinder 1, protecting the glue inside the cylinder 1 from contamination or leakage during storage or transportation. The cover plate 21 is also provided with a round hole 24 and two positioning holes 22. The round hole 24 is used to reduce the weight of the cover plate 21. The positioning holes 22 are used to allow air to enter the gap between the cover plate 21 and the cylinder 1 when the cover plate 21 is separated from the cylinder 1, which facilitates the removal of the cover plate 21.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dispensing syringe with rapid venting capability, comprising a syringe body (1) and a piston block (5) inside the syringe body (1), characterized in that: The inner wall of the cylinder (1) is provided with an exhaust structure (4), and there is a gap between the exhaust structure (4) and the piston block (5). The exhaust structure (4) can discharge the gas in the glue when the piston block (5) moves to the tail and head of the cylinder (1). The tail of the cylinder (1) is detachably equipped with a rear cover (2), and the head of the cylinder (1) is detachably equipped with a head plug (3).

2. The dispensing syringe with rapid air venting according to claim 1, characterized in that: The exhaust structure (4) is configured with multiple exhaust slots, which are equidistantly distributed on the inner walls of the cylinder (1).

3. The dispensing syringe with rapid air venting according to claim 2, characterized in that: The exhaust channels are configured in segments, with multiple exhaust channels evenly distributed on the inner walls of both ends of the cylinder (1).

4. The dispensing syringe with rapid air venting according to claim 3, characterized in that: The texture of the exhaust groove is set to one of the following: brushed texture, fine texture, and leather texture.

5. A dispensing syringe with rapid air venting according to claim 1, characterized in that: The piston block (5) includes a bullet head (54), and an annular plate (51) is integrally formed on the upper end of the bullet head (54). A reinforcing mechanism is provided inside the annular plate (51). An edge (55) is integrally formed on the outer wall of the annular plate (51) near the bullet head (54). An arc surface (56) is provided on the outer wall of the annular plate (51). A gap is left between the arc surface (56) and the inner wall of the cylinder (1).

6. A dispensing syringe with rapid air venting according to claim 5, characterized in that: The reinforcement mechanism includes a support column (52) integrally formed on the upper end of the bullet head (54), and a reinforcement plate (53) is fixed to the outer wall of the support column (52) at equal angles.

7. A dispensing syringe with rapid air venting according to claim 1, characterized in that: The head plug (3) includes a plug cover (31), and a stud (32) is integrally formed inside the plug cover (31). The head of the cylinder (1) is provided with a needle (12), and a screw hole (13) for the stud (32) to be screwed on the side wall of the needle (12).

8. A dispensing syringe with rapid air venting according to claim 1, characterized in that: The rear cover (2) includes a cover plate (21) that covers the upper end of the cylinder (1). The two ends of the cover plate (21) are provided with hanging ears (23). The tail of the cylinder (1) is integrally formed with a folded edge (11) for the hanging ears (23) to fasten.

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