Storage container for a spraying tool

Abstract

Storage container for a spraying tool, comprising a container body (1) comprising a storage chamber (11), an upwardly directed opening (12) and a connecting section (13) facing away from the opening (12), wherein the opening (12) and the connecting section (13) each communicate with the storage chamber (11); an upper cover (2) connected to the opening (12) and having an axial recess (21), the recess (21) being composed of a large-diameter section (211) and a small-diameter section (212), a step (22) being formed at a transition point between the large-diameter section (211) and the small-diameter section (212), the bottom of the small-diameter section (212) forming a barrier surface (23), and the barrier surface (23) being penetrated by a valve bore (24) to communicate with the reservoir (11); and a rotary knob (3) having a shaft section (31) at one end, the end of the shaft section (31) having an end surface (32) from which a closure section (33) extend coaxially into the small-diameter section (212), the closure section (33) having a closure surface (34) corresponding to the locking surface (23), the rotary knob (3) being penetrated by an air channel (35), and the air channel (35) communicating at one end with the outside of the rotary knob and at the other end with the end surface (32), the rotary knob (3) controlling the shaft section (31) for axial movement, wherein, when the shaft section (31) moves axially downwards, the end surface (32) and the closure surface (34) respectively bear against the step (22) and the locking surface (23) to close the air channel (35) and the valve bore (24) and thereby the reservoir. (11) to seal,and when the shaft section (31) moves axially upwards, the end surface (32) and the sealing surface (34) are each separated from the step (22) and the locking surface (23), so that the reservoir (11) communicates with the outside environment via the valve bore (24) and the air duct (35).

Description

Technical field

[0001] The innovation concerns an injection mold, in particular a reservoir for an injection mold. State of the art

[0002] Conventional spray guns and spray pens each have a reservoir cup for holding liquid materials. Compressed air forces the liquid materials from the reservoir cup to spray them onto an object. A typical reservoir cup is fitted with a lid to prevent spillage during spraying. The lid has a through-hole to equalize pressure inside the cup and ensure smooth dispensing. However, the lid of conventional reservoir cups is usually clipped directly onto the cup without any additional fastening elements. With larger movements during spraying, the lid can easily come loose, leading to spillage of the paint inside the cup.

[0003] In this context, Taiwanese utility model no. M275033 discloses a paint cup for spray pens in which the cup body is connected to the lid via a hinge. This allows the lid to be opened easily without being lost; however, the problem remains that the lid can easily detach and the paint can leak out. During a temporary interruption of use, it must be ensured that the opening of the reservoir cup is facing upwards. If the cup is accidentally tipped over, the paint will leak out of the lid's through-hole. Furthermore, the lid's vent cannot be closed, resulting in continuous air circulation between the inside of the cup and the outside environment. With prolonged periods of inactivity, the paint evaporates and hardens, impairing its effectiveness.

[0004] To solve the aforementioned problems, Taiwanese utility model no. M380834 discloses a paint cup for spray guns, the lid of which has a vent opening that communicates with the interior of the cup, the vent opening being closed by a plug. The side wall of the plug has a through-hole that communicates with the vent opening. This achieves, on the one hand, a pressure equalization effect inside the cup, and on the other hand, it increases the length of the air channel so that the paint in the cup cannot easily flow out through the vent opening. However, since the air channel of this paint cup cannot be closed, the problem remains that the paint in the cup evaporates and hardens when not in use. The purpose of the innovation

[0005] The purpose of the innovation is to provide a reservoir for an injection molding tool that achieves the effect of preventing leakage, evaporation, and hardening of the dye.

[0006] This task is solved by the following technical solution: A storage container for an injection mold, comprising a container body comprising a storage chamber, an upwardly directed opening and a connecting section facing away from the opening, wherein the opening and the connecting section each communicate with the storage chamber; an upper cover connected to the opening and having an axial recess, the recess consisting of a large-diameter section and a small-diameter section, a step being formed at a transition point between the large-diameter section and the small-diameter section, the bottom of the small-diameter section forming a barrier surface, and the barrier surface being penetrated by a valve bore to communicate with the reservoir; and a rotary knob having a shaft section at one end, the end of the shaft section having an end face from which a closure section insertable into the small-diameter section extends coaxially, the closure section having a closure surface corresponding to the closure surface, the rotary knob being penetrated by an air channel, and the air channel communicating at one end with the outside and at the other end with the end face, the rotary knob controlling the shaft section for axial movement, wherein, when the shaft section moves axially downwards, the end face and the closure surface each bear against the step and the closure surface to close the air channel and the valve bore and thereby seal the reservoir, and when the shaft section moves axially upwards, the end face and the closure surface each are separated from the step and the closure surface.so that the storage chamber communicates with the outside via the valve bore and the air duct.

[0007] Preferably, an external thread is provided on the outer circumferential wall of the shaft section and an internal thread is provided on the inner circumferential wall of the large diameter section corresponding to the external thread, so that the shaft section and the large diameter section are connected to each other via the thread.

[0008] Preferably, a first sealing ring is provided at the end of the shaft section opposite the closure section, wherein the first sealing ring is arranged adjacent to the external thread.

[0009] Preferably, a second sealing ring is provided between the end surface and the closure surface on the closure section.

[0010] Preferably, the closure section forms a chamfer at the circumference of its end, which is connected to the closure surface.

[0011] Preferably, a seal is provided between the upper cover and the opening of the container body.

[0012] Preferably, a channel communicating with the storage chamber is formed inside the connecting section, and a connecting thread is provided on the outer circumference of the connecting section.

[0013] Compared to the prior art, the innovation offers significant advantages and beneficial effects. As can be seen from the aforementioned technical solution, an air passage connecting the storage chamber to the outside environment is essentially formed by the non-coaxial arrangement of the valve bore in the top cover and the air channel of the rotary knob. During use, the container can be tilted at any angle without the dye easily escaping through the connected air passage. Furthermore, the rotary knob can control the opening or closing of the air passage, thus preventing the dye from easily evaporating or hardening, and extending the effective storage life of the dye. Brief description of the drawings Fig. Figure 1 is a perspective view of the overall structure of the innovation. Fig. Figure 2 is an exploded view of the innovation. Fig. Figure 3 is a cross-sectional view of the innovation. Fig. Figure 4 is a sectional view of the innovation in its state of use. Ways to implement the innovation

[0014] The Fig. Figures 1 to 3 show a preferred embodiment of the reservoir for an injection mold of the invention, which essentially comprises a reservoir body 1, an upper cover 2 and a rotary knob 3.

[0015] The container body 1 has an internal storage chamber 11 and an opening 12 communicating with the storage chamber 11. The container body 1 also has a connecting section 13 facing away from the opening 12. Inside the connecting section 13, a channel 14 communicating with the storage chamber 11 is formed, and a connecting thread 15 is provided on its outer circumference. The container body 1 is connected via the connecting thread 15 to a spray gun or spray lance, which has a corresponding mounting thread.

[0016] The upper cover 2 is connected to the opening 12 to close the reservoir 11. In the present embodiment, the upper cover 2 is connected to the opening 12 via a thread, with a seal 4 arranged between the upper cover 2 and the opening 12 to ensure the tightness of the connection between the upper cover 2 and the opening 12, so that the dye cannot easily escape through the connection point between the upper cover 2 and the opening 12. The upper cover 2 has an axial recess 21, the recess 21 consisting of a large-diameter section 211 and a small-diameter section 212. A step 22 is formed at the transition between the large-diameter section 211 and the small-diameter section 212. The bottom of the small-diameter section 212 forms a barrier surface 23.The barrier surface 23 is penetrated by a valve bore 24 to communicate with the storage chamber 11.

[0017] The rotary knob 3 has a shaft section 31 at one end, the end of which has an end surface 32. A closure section 33, which can be inserted into the small-diameter section 212, extends coaxially from the end surface 32. The closure section 33 has a closure surface 34 corresponding to the locking surface 23. The rotary knob 3 is penetrated by an air channel 35, the air channel 35 communicating at one end with the outside and at the other end with the end surface 32. By communicating with the valve bore 24, the air channel 35 forms an air path for equalizing the internal pressure of the reservoir chamber 11. The rotary knob 3 can control the shaft section 31 to move axially, causing the closure section 33 to close the valve bore 24 to interrupt the air path or to open the valve bore 24 to release the air path.For further explanation, in the present embodiment an external thread 311 is provided on the outer circumferential wall of the shaft section 31, and an internal thread 213 is provided on the inner circumferential wall of the large diameter section 211 corresponding to the external thread 311, so that the shaft section 31 and the large diameter section 211 are connected to each other via the thread.

[0018] In practical use, as in Fig. As shown in Figure 3, the rotary knob 3 is turned to move the shaft section 31 axially downwards along the helical direction of the internal thread 213. This causes the end surface 32 to abut the step 22, while the sealing surface 34 abuts the locking surface 23, so that the step 22 and the end surface 32, working together, close the air channel 35 and the small-diameter section 212. Thus, the sealing surface 34 closes the valve bore 24, and the air path connecting the reservoir 11 to the outside is closed. This prevents the dye in the reservoir 11 from evaporating or hardening, thereby extending its shelf life.

[0019] As in Fig. As shown in Figure 4, when the rotary knob 3 is turned to move the shaft section 31 axially upwards, the end surface 32 and the sealing surface 34 move away from the step 22 and the locking surface 23, respectively, thus opening the air duct 35 and the valve bore 24. When the sealing section 33 is moved so that the large-diameter section 211 and the small-diameter section 212 communicate with each other, the air duct 35 and the valve bore 24 are connected, thereby opening the air path. The reservoir 11 communicates with the outside environment via this air path, thus achieving the effect of pressure equalization inside the reservoir 11. It should be noted in particular that the air duct 35 and the valve bore 24 are not coaxially arranged, so the air path formed by the connection of the air duct 35 and the valve bore 24 has a curved path.Even if the container body 1 is tilted arbitrarily during use and the dye overflows through the valve bore 24 into the small-diameter section 212, it cannot easily flow outwards through the air channel 35. Therefore, the effect of preventing dye leakage is achieved.

[0020] For further explanation, as in the Fig. 3 and Fig. As shown in Figure 4, a first sealing ring 36 is provided at the end of the shaft section 31 opposite the closure section 33. The first sealing ring 36 is located adjacent to the external thread 311. This serves, on the one hand, to increase the tightness between the shaft section 31 and the large-diameter section 211, and on the other hand, to stabilize the shaft section 31 to enable smooth movement. When used as shown in Fig.As shown in Figure 4, the rotary knob 3 is turned to move the shaft section 31 upwards. When the first sealing ring 36 reaches the upper end of the large-diameter section 211, the contact area between the first sealing ring 36 and the large-diameter section 211 decreases, thus reducing the rotational resistance of the rotary knob 3. At this point, the closing surface 34 of the closing section 33 is separated from the locking surface 23, and the end surface 32 is separated from the step 22, allowing the large-diameter section 211 and the small-diameter section 212 to communicate with each other, so that the air channel 35 and the valve bore 24 are connected to equalize the air pressure in the reservoir chamber 11. Therefore, during use, the user can assess the open or closed state of the air path by observing the change in the rotational resistance of the rotary knob 3.

[0021] A second sealing ring 37 is provided on the closure section 33 between the end surface 32 and the closure surface 34 to increase the tightness of the connection between the closure section 33 and the small-diameter section 212. The interaction between the first sealing ring 36 and the second sealing ring 37 increases the airtightness when the storage chamber 11 is closed by the rotary knob 3. This prevents the dye stored in the storage chamber 11 from evaporating or hardening easily, thus extending its shelf life.

[0022] Furthermore, a chamfer 38 is formed on the circumference of the end of the closure section 33, which is connected to the closure surface 34. This causes the end of the closure section 33 to taper in the axial direction, thereby increasing the distance between the end of the closure section 33 and the inner circumferential wall of the small-diameter section 212. This allows the air passage to be opened with a smaller axial stroke of the shaft section 31.

[0023] In summary, the reservoir for an injection mold of the innovation can achieve the following advantageous effects: 1. Prevention of dye leakage at any tilt angle: Due to the non-coaxial arrangement of the valve bore 24 and the air channel 35, the air path formed by their connection has a curved profile. Even if the container body is tilted at any angle during use, the liquid from the reservoir 11, even if it escapes through the valve bore 24, cannot easily flow further outwards through the air channel 35. This effectively prevents dye leakage at any tilt angle. 2. Extending the dye's shelf life: The air channel 35 and the valve bore 24 can be opened or closed by the axial up-and-down movement of the shaft section 31, controlled by the rotary knob. The first sealing ring 36 and the second sealing ring 37 increase the tightness between the shaft section 31 and the recess 21. After closing the air channel 35 and the valve bore 24, the reservoir 11 has excellent airtightness, thus solving the problem of short shelf life due to dye evaporation and hardening. 3. Indication of the open and closed state of the air passage: The present innovation indicates the open or closed state of the air passage by the change in the frictional force between the first sealing ring 36 and the large-diameter section 211 during the movement of the shaft section 31. This enables simple and convenient operation. Reference symbol list 1 container body 11 Pantry 12 Opening 13 Connecting section 14-channel 15 connecting threads 2 top cover 21 Exclusion 211 Large diameter section 212 Small diameter section 213 Internal thread Level 22 23 Restricted area 24 valve bore 3 rotary knobs 31 shaft section 311 External thread 32 End surface 33 Closure section 34 Closure area 35 Air duct 36 first sealing ring 37 second sealing ring 38 phase 4 Seal

Claims

[1] Storage container for an injection mold, comprising a container body (1) comprising a storage chamber (11), an upwardly directed opening (12) and a connecting section (13) facing away from the opening (12), wherein the opening (12) and the connecting section (13) each communicate with the storage chamber (11); an upper cover (2) connected to the opening (12) and having an axial recess (21), the recess (21) being composed of a large-diameter section (211) and a small-diameter section (212), a step (22) being formed at a transition point between the large-diameter section (211) and the small-diameter section (212), the bottom of the small-diameter section (212) forming a barrier surface (23), and the barrier surface (23) being penetrated by a valve bore (24) to communicate with the reservoir (11); and a rotary knob (3) having a shaft section (31) at one end, the end of the shaft section (31) having an end surface (32) from which a closure section (33) extend coaxially into the small-diameter section (212), the closure section (33) having a closure surface (34) corresponding to the locking surface (23), the rotary knob (3) being penetrated by an air channel (35), and the air channel (35) communicating at one end with the outside of the rotary knob and at the other end with the end surface (32), the rotary knob (3) controlling the shaft section (31) for axial movement, wherein, when the shaft section (31) moves axially downwards, the end surface (32) and the closure surface (34) respectively bear against the step (22) and the locking surface (23) to close the air channel (35) and the valve bore (24) and thereby the reservoir. (11) to seal,and when the shaft section (31) moves axially upwards, the end surface (32) and the sealing surface (34) are each separated from the step (22) and the locking surface (23), so that the reservoir (11) communicates with the outside environment via the valve bore (24) and the air duct (35). [2] Storage container according to claim 1, characterized by , that an external thread (311) is provided on the outer circumferential wall of the shaft section (31) and an internal thread (213) is provided on the inner circumferential wall of the large diameter section (211) corresponding to the external thread (311), so that the shaft section (31) and the large diameter section (211) are connected to each other via the thread. [3] Storage container according to claim 2, characterized by, that a first sealing ring (36) is provided at the end of the shaft section (31) opposite the closure section (33), wherein the first sealing ring (36) is arranged adjacent to the external thread (311). [4] Storage container according to claim 1, characterized by , that a second sealing ring (37) is provided between the end surface (32) and the closure surface (34) on the closure section (33). [5] Storage container according to claim 1, characterized by , that the closure section (33) forms a chamfer (38) at the circumference of its end, which is connected to the closure surface (34). [6] Storage container according to claim 1, characterized by , that a seal (4) is provided between the upper cover (2) and the opening (12) of the container body (1). [7] Storage container according to claim 1, characterized by, that inside the connecting section (13) a channel (14) communicating with the storage chamber (11) is formed and a connecting thread (15) is provided on the outer circumference of the connecting section (13).

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