Multi-stroke hot runner cylinder
By introducing a limiting mechanism and a temperature control mechanism into the hot runner cylinder, the problems of valve needle misalignment and temperature instability are solved, achieving stable valve needle movement and temperature control, and improving the service life and reliability of the equipment.
Patent Information
- Application Number
- CN202520471182.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-18
AI Technical Summary
The existing hot runner cylinder lacks a limiting mechanism, which makes the valve needle prone to deflection, bending or breaking when moving.
A multi-stroke hot runner cylinder was designed, which includes a limiting mechanism, a thermostatic mechanism, and a dynamic sealing ring. The range of motion of the valve needle is limited by the slide bar and the limiting plate, the temperature of the casting cavity is kept stable by thermostatic hot oil, and the material overflow is prevented by the dynamic sealing ring.
It effectively prevents valve needle misalignment, bending, and breakage, maintains a constant temperature in the casting chamber, prevents material leakage, and improves equipment stability and service life.
Smart Images
Figure CN223877442U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to hot runner air cylinder field, concretely relates to a kind of multi-stroke hot runner air cylinder. BACKGROUND
[0002] Hot runner is the heating assembly system used in injection mold, which injects melted plastic particles into the cavity of mold. Hot runner mold is a new structure that the runner and the flow channel of traditional mold or three-plate mold are heated, so that the runner and the flow channel do not need to be removed during each molding. The hot runner needs to be controlled and moved by using air cylinder during use.
[0003] A needle valve type hot runner air cylinder with patent No. 2018200372, the air cylinder body is a hollow tubular structure, and the piston rod is arranged in the air cylinder body. The top of the air cylinder body is provided with a disc-shaped air cylinder upper cover, and the bottom of the air cylinder body is provided with a disc-shaped air cylinder lower cover. The air cylinder lower cover is provided with a piston hole and a circular blind groove. After the lower end of the air cylinder body is inserted into the circular blind groove, the piston rod passes through the piston hole. A fixing ring is arranged outside the air cylinder body. The two ends of the fixing ring are fixedly connected with the air cylinder upper cover and the air cylinder lower cover by screws. Then, the air cylinder is placed into a mold plate, and the air cylinder is fixedly arranged in the mold plate by screws passing through the air cylinder upper cover.
[0004] When the utility model is used, there is no limiting mechanism, and the valve needle may be bent or broken during movement.
[0005] Therefore, the utility model is proposed. UTILITY MODEL CONTENT
[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a multi-stroke hot runner air cylinder.
[0007] To solve the above technical problems, the basic idea of the technical solution of the utility model is as follows:
[0008] A multi-stroke hot runner air cylinder, comprising a hot runner air cylinder mechanism; the hot runner air cylinder mechanism is composed of a moving plate, a fixed plate and a casting cavity; a cylinder is installed at the middle position of the rear end of the moving plate; a limiting mechanism is installed around the moving plate and the fixed plate; a plurality of casting cavities are uniformly installed at one side of the mounting seat; the mounting seat is installed at one side of the fixed plate; a valve needle is slidably installed in the casting cavity; one end of the valve needle is installed on the upper side of the mounting plate; the mounting plate is installed at one side of the moving plate; a constant temperature mechanism is installed in the casting cavity; and a feeding pipe is installed at one side of the casting cavity.
[0009] Optionally, a heat insulation plate is arranged at the inner side of the moving plate and fixedly installed at the inner side of the moving plate by bolts.
[0010] Optionally, the constant temperature mechanism is composed of a circulating pipe, a flow channel, an inlet pipe and an outlet pipe, the circulating pipe is installed at an inner position of the casting cavity, the flow channel is installed at both ends of the circulating pipe, the flow channel is installed at an inner position of the mounting base, and the inlet pipe and the outlet pipe are installed at end positions of the flow channel respectively.
[0011] Optionally, an insulation plate is arranged at an outer position of the circulating pipe at an inner position of the casting cavity, and the insulation plate is installed at an outer position of the casting cavity.
[0012] Optionally, a dynamic sealing ring is installed at a middle position of one end of the casting cavity, and the dynamic sealing ring is in sliding connection with the valve needle.
[0013] Optionally, the limiting mechanism is composed of a sliding rod and a limiting plate, the sliding rod is in sliding installation at a periphery position of the moving plate, and the limiting plate is welded at an end position of the sliding rod.
[0014] After the above technical scheme is adopted, the present application has the following advantages compared with the prior art, of course, any product implementing the present application does not necessarily need to achieve all the advantages described below:
[0015] 1. The sliding rod of the limiting mechanism limits the activity range thereof, prevents deviation, and avoids bending and breaking of the valve needle.
[0016] 2. In use, the constant temperature mechanism guides the constant temperature hot oil from the outside into the flow channel, into the circulating pipe through the flow channel, and the hot oil in the circulating pipe maintains the stability of the inside of the casting cavity, and the used hot oil is guided to the flow channel and discharged through the outlet pipe.
[0017] 3. The dynamic sealing ring is arranged to dynamically seal between the casting cavity and the valve needle, so as to avoid that the pressure in the casting cavity is too large and the material overflows through the gap between the valve needle and the casting cavity.
[0018] 4. In use, the limiting mechanism limits the activity range of the moving plate through the sliding rod, so that the moving plate only moves in the radial direction, and the phenomenon of left and right shaking during the movement of the moving plate is avoided, and the limiting plate is arranged to avoid that the sliding rod is separated from the limiting plate.
[0019] The specific implementation of the present application will be described in further detail below in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0020] The drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings. In the drawings:
[0021] Figure 1Structure schematic view of one embodiment of the utility model;
[0022] Figure 2 Structure schematic view of one embodiment of the utility model from the side;
[0023] Figure 3 Structure schematic view of one embodiment of the utility model from the inside;
[0024] Figure 4 Structure schematic view of the inside of the mounting seat of one embodiment of the utility model;
[0025] Figure 5 Structure schematic view of the pouring cavity of one embodiment of the utility model;
[0026] In the drawings, the components represented by the respective reference numerals are listed as follows:
[0027] 1, hot runner cylinder mechanism;2, moving plate;3, fixed plate;4, pouring cavity;5, dynamic sealing ring;6, mounting seat;7, limiting mechanism;8, slide rod;9, limiting plate;10, mounting plate;11, valve needle;12, feed pipe;13, liquid inlet pipe;14, cylinder;15, flow channel;16, liquid outlet pipe;17, heat preservation plate;18, circulating pipe;19, constant temperature mechanism;20, heat insulation plate.
[0028] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the utility model in any way, but to illustrate the concept of the utility model to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION
[0029] The utility model will now be described in further detail with reference to the drawings.
[0030] Please refer to Figures 1-5 It is shown that in the embodiment, a multi-stroke hot runner cylinder is provided, comprising a hot runner cylinder mechanism 1;The hot runner cylinder mechanism 1 is composed of a moving plate 2, a fixed plate 3 and a pouring cavity 4, the moving plate 2 is provided with a cylinder 14 at the middle position of the rear end, the moving plate 2 and the fixed plate 3 are provided with limiting mechanisms 7 at the positions around the periphery, a plurality of pouring cavities 4 are uniformly installed at one side position of the mounting seat 6, the mounting seat 6 is installed at one side position of the fixed plate 3, the valve needle 11 is slidably installed in the pouring cavity 4, one end of the valve needle 11 is installed on the upper side of the mounting plate 10, the mounting plate 10 is installed on one side of the moving plate 2, the constant temperature mechanism 19 is installed in the pouring cavity 4, and the feed pipe 12 is installed at one side position of the pouring cavity 4.
[0031] The application of one aspect of the embodiment is: when in use, the air cylinder 14 is opened, the air cylinder drives the valve needle 11 to move, the front end of the casting cavity 4 is opened, the internal material is guided out from the front end outlet, and the feeding pipe 12 guides the material. After the casting is completed, the air cylinder 14 drives the moving plate 2 to reset, and the valve needle 11 blocks the front end outlet of the casting cavity 4. When the moving plate 2 moves, the slide rod 8 of the limiting mechanism 7 limits the activity range thereof, prevents deviation, avoids bending and breaking of the valve needle 11. During the material casting process, the constant temperature mechanism 19 maintains the internal temperature of the casting cavity 4 constant, the external constant temperature hot oil is guided into the flow channel 15 through the liquid inlet pipe 13, and then enters the circulating pipe 18, so that the temperature of the casting cavity 4 is stably maintained, and the hot oil after use is guided out from the liquid outlet pipe 16 through the flow channel 15. The heat insulation plate 20 insulates the heat transfer between the moving plate 2 and the fixed plate 3, prevents high temperature from affecting the air cylinder 14; the heat preservation plate 17 insulates the influence of the external temperature on the inside of the casting cavity 4, and reduces heat loss; the dynamic sealing ring 5 performs dynamic sealing between the casting cavity 4 and the valve needle 11, and prevents material overflow.
[0032] In the embodiment, the heat insulation plate 20 is arranged at the inner side position of the moving plate 2, the heat insulation plate 20 is fixedly arranged at the inner side position of the moving plate 2 through bolts, and the heat insulation plate 20 is arranged to insulate the heat transfer between the moving plate 2 and the fixed plate 3, so as to avoid the influence of high temperature on the use of the air cylinder 14
[0033] In the embodiment, the constant temperature mechanism 19 is composed of the circulating pipe 18, the flow channel 15, the liquid inlet pipe 13 and the liquid outlet pipe 16, the circulating pipe 18 is arranged at the internal position of the casting cavity 4, the flow channel 15 is arranged at the positions of both ends of the circulating pipe 18, the flow channel 15 is arranged at the internal position of the mounting seat 6, the liquid inlet pipe 13 and the liquid outlet pipe 16 are respectively arranged at the end positions of the flow channel 15, and the constant temperature mechanism 19 guides the external constant temperature hot oil into the internal flow channel 15 through the liquid inlet pipe 13 in use, guides the hot oil into the internal circulating pipe 18 through the flow channel 15, and the hot oil in the internal circulating pipe 18 maintains the internal stability of the casting cavity 4, and the hot oil after use is guided to the flow channel 15 and is guided out through the liquid outlet pipe 16.
[0034] In the embodiment, the heat preservation plate 17 is arranged at the internal position of the circulating pipe 18 of the casting cavity 4, the heat preservation plate 17 is arranged at the external position of the casting cavity 4, and the heat preservation plate 17 is arranged to insulate the influence of the external temperature on the internal temperature of the casting cavity 4 and reduce the heat loss in the internal casting cavity 4.
[0035] In the embodiment, the dynamic sealing ring 5 is arranged at the middle position of one end of the casting cavity 4, the dynamic sealing ring 5 is slidably connected with the valve needle 11, and the dynamic sealing ring 5 is arranged to perform dynamic sealing between the casting cavity 4 and the valve needle 11, so as to avoid that the internal pressure of the casting cavity 4 is too large and the material overflows through the gap between the valve needle 11 and the casting cavity 4.
[0036] The limiting mechanism 7 is composed of a sliding rod 8 and a limiting plate 9, the sliding rod 8 is slidingly installed at the position around the moving plate 2, the limiting plate 9 is welded at the end position of the sliding rod 8, the limiting mechanism 7 limits the moving range of the moving plate 2 through the sliding rod 8 in use, so that the moving plate 2 only moves in the radial direction, and the left and right shaking phenomenon in the moving process of the moving plate 2 is avoided, and the limiting plate 9 is arranged to avoid the sliding rod 8 from being separated from the limiting plate 9.
[0037] The utility model is not limited to the above-mentioned embodiment, any person should know the structural change made under the inspiration of the utility model, any identical or similar technical scheme with the utility model falls into the protection scope of the utility model. The utility model is not described in detail, and the technical, shape and structure parts are all known technology.
Claims
1. A multi-stroke hot runner air cylinder characterized by, The utility model provides a hot runner cylinder mechanism (1), the hot runner cylinder mechanism (1) is by moving plate (2), fixed plate (3) and casting cavity (4) composition, the moving plate (2) rear end middle position installs the cylinder (14), the moving plate (2) and fixed plate (3) all around position installs the limiting mechanism (7), a plurality of casting cavity (4) evenly installs in the one side position of mounting seat (6), the mounting seat (6) is installed in the one side position of fixed plate (3), the casting cavity (4) inside slide installation has the valve needle (11), the valve needle (11) one end installs in the upper side of mounting plate (10), the mounting plate (10) is installed in the one side of moving plate (2), the casting cavity (4) inside installation has constant temperature mechanism (19), the casting cavity (4) one side position installs the feed pipe (12).
2. A multi-stroke hot runner air cylinder as claimed in claim 1, wherein, The moving plate (2) is provided with a heat insulation plate (20) on the inner side, and the heat insulation plate (20) is fixedly installed on the inner side of the moving plate (2) by bolts.
3. A multi-stroke hot runner air cylinder as claimed in claim 1, wherein, The constant temperature mechanism (19) is composed of a circulating pipe (18), a flow channel (15), an inlet pipe (13) and an outlet pipe (16), the circulating pipe (18) is installed in the inside of the casting cavity (4), the flow channel (15) is installed at both ends of the circulating pipe (18), the flow channel (15) is installed in the inside of the mounting seat (6), the inlet pipe (13) and the outlet pipe (16) are respectively installed at the ends of the flow channel (15).
4. A multi-stroke hot runner air cylinder as claimed in claim 1, wherein, The casting cavity (4) is provided with a heat preservation plate (17) outside the circulating pipe (18), and the heat preservation plate (17) is installed outside the casting cavity (4).
5. A multi-stroke hot runner air cylinder as claimed in claim 1, wherein, The casting cavity (4) is provided with a dynamic sealing ring (5) at the middle of one end, and the dynamic sealing ring (5) is in sliding connection with the valve needle (11).
6. A multi-stroke hot runner air cylinder as claimed in claim 1, wherein, The limiting mechanism (7) is composed of a slide rod (8) and a limiting plate (9), the slide rod (8) is slidably installed around the moving plate (2), and the limiting plate (9) is welded at the end of the slide rod (8).