Hot runner injection mold

Abstract

The utility model discloses a hot runner injection mold which comprises a lower mold assembly and an upper mold assembly matched with the lower mold assembly to complete injection molding, the lower mold assembly comprises an injection molding assembly used for completing injection molding, and the upper mold assembly comprises a feeding port used for feeding injection molding fluid and a hot runner plate used for heating the injection molding fluid. The hot runner plate is internally provided with a heating cavity which is communicated with the feeding hole and is used for accommodating injection molding fluid, the hot runner plate is provided with a plurality of heating assemblies for heating the injection molding fluid, and the heating cavity is internally provided with a plurality of hot nozzle assemblies for circulating the injection molding fluid to the injection molding assemblies. Materials are conveyed into the hot runner plate through the feeding port, after the heating assembly conducts heating and heat preservation, injection molding fluid flows to the injection molding assembly through the hot nozzle assembly, generation of runners can be avoided in one-time injection molding production, injection molding pressure is relieved in the injection molding process, and material consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot runner mould technical field especially relates to a hot runner injection mould.

BACKGROUND TECHNIQUE

[0002] Hot runner mould is mainly used for producing plastic product, it is the mould that always does not solidify in runner with heating device, and hot runner mould is shorter than the forming cycle of traditional mould, and more saving raw material, so hot runner mould obtains very widespread application in the world each industrial developed country and region. The main working procedure when hot runner mould is used for injection product is, first melt plastic raw material is injected from injection molding machine into the main runner of hot runner mould setting, melt plastic raw material flows through the runner, and then to the nozzle, then by the nozzle injection into the mould cavity, finally plastic product is formed. When passing through the runner, there is a risk of runner generation when the injection fluid flows, because the injection fluid has viscosity, the injection pressure has an impact on the product in the actual injection, and also increases the consumption of materials.

CONTENT OF UTILITY MODEL

[0003] To solve the above technical problem, the utility model provides a hot runner injection mould.

[0004] The utility model realizes by the following technical schemes:

[0005] A kind of hot runner injection mould, including lower mould component and with the lower mould component cooperation complete injection molding upper mould component, the lower mould component includes for completing injection molding injection assembly, the upper mould component includes for feeding injection fluid feeding port and for the hot runner plate of injection fluid heating treatment, the hot runner plate is equipped with the heating cavity for accommodating injection fluid with the feeding port being communicated, the hot runner plate is equipped with multiple heating components for heating injection fluid, the heating cavity is equipped with multiple hot nozzle components for making injection fluid flow to the injection assembly.

[0006] As described above, a kind of hot runner injection mould, the heating component includes the heating part for heating injection fluid and the switch-on part for connecting power supply with the heating part, the heating part is arranged in the heating cavity interior.

[0007] As described above, a kind of hot runner injection mould, the heating part is the heating pipeline around the hot nozzle component.

[0008] As described above, a kind of hot runner injection mould, the hot nozzle component includes the flow guide part for the flow of injection fluid and the nozzle part for injecting injection fluid with the flow guide part interior runner corresponding, the flow guide part and the nozzle part are connected with the heat preservation part for heat preservation and flow guide injection fluid with both interior runner being communicated.

[0009] A hot runner injection mold as described above, the upper mold assembly is provided with a needle valve assembly cooperating with the hot nozzle assembly for controlling the flow of injection fluid, the needle valve assembly includes a valve needle cooperating with the nozzle part to control the flow of injection fluid and a cylinder driving the valve needle.

[0010] A hot runner injection mold as described above, the injection assembly is provided with a positioning hole corresponding to the position of the nozzle part, the positioning hole is communicated with the injection cavity inside the injection assembly.

[0011] A hot runner injection mold as described above, the upper mold assembly includes a first plate and a second plate connected with the first plate, the second plate is provided with a cavity accommodating the hot runner plate, and the feed port is arranged on the first plate.

[0012] A hot runner injection mold as described above, the upper mold assembly is provided with a socket for connecting with a power supply, and the socket is electrically connected with the on portion.

[0013] A hot runner injection mold as described above, the upper mold assembly is provided with an opening and closing sequence valve for controlling the opening and closing sequence of the hot nozzle assembly.

[0014] A hot runner injection mold as described above, the lower mold assembly includes a base and an injection seat connected with the base for mounting the injection assembly, the second plate is provided with a positioning column for positioning the clamping position of the upper mold assembly and the lower mold assembly, and the injection seat is provided with a positioning hole matched with the positioning column.

[0015] Compared with the prior art, the hot runner injection mold has the following beneficial effects:

[0016] 1. The material is conveyed into the hot runner plate through the feed port, the heating assembly is heated and kept warm, and then the injection fluid is circulated to the injection assembly through the hot nozzle assembly, so that the flow channel can be avoided in one injection production, the injection pressure is reduced in the injection process, and the consumption of materials is reduced.

[0017] 2. The hot nozzle assembly cooperates with the needle valve assembly to control the flow and flow rate of the injection fluid, and a heat preservation part is arranged between the flow guide part and the nozzle part to reduce the injection pressure of the injection fluid in the flow process.

DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0019] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0020] Figure 2 is a partial exploded view of the upper die assembly of the utility model; Figure 1

[0021] Figure 3 is a partial exploded view of the upper die assembly of the utility model;

[0022] Figure 4 is a partial exploded view of the upper die assembly of the utility model; Figure 3

[0023] Figure 5 is a partial exploded view of the upper die assembly of the utility model;

[0024] Figure 6 is a partial exploded view of the upper die assembly of the utility model Figure 5

[0025] Figure 7 is a partial exploded view of the upper die assembly of the utility model;

[0026] Figure 8 is a partial exploded view of the upper die assembly of the utility model.

[0027] Wherein, the reference signs are as follows:

[0028] 1, lower die assembly; 11, injection molding assembly; 111, alignment hole; 112, matching part; 12, base; 121, ejection part; 13, injection molding seat; 131, positioning hole; 2, upper die assembly; 21, first plate; 211, feeding port; 212, opening and closing sequence valve; 22, second plate; 221, socket; 222, positioning column; 23, third plate; 24, hot runner plate; 241, heating cavity; 242, heating assembly; 2421, heating part; 2422, connecting part; 243, hot nozzle assembly; 2431, flow guide part; 2432, nozzle part; 2433, heat preservation part; 244, needle valve assembly; 2441, valve needle; 2442, air cylinder.

DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0030] Specific examples, in combination with Figures 1 to 6 ​​​As shown, further illustrate the technical scheme of the utility model, a hot runner injection mold, including for bearing injection lower die assembly 1 and with lower die assembly 1 cooperate for fluid flow into injection cavity upper die assembly 2, lower die assembly 1 on for injection fluid injection assembly 11. Lower die assembly 1 with upper die assembly 2 cooperate, both mold after input injection fluid flows into injection assembly 11 in upper die assembly 2, complete molding in the injection assembly 11 of certain structure mold.

[0031] In the embodiment, the upper die assembly 2 includes a first plate 21 for flowing injection fluid, and a feed port 211 disposed on the first plate 21 and communicated with the internal flow channel thereof, one side of the first plate 21 is connected with a second plate 22 for flowing injection fluid and communicated with the internal flow channel of the first plate 21, the second plate 22 is connected with a third plate 23 for flowing injection fluid and providing space for accommodating the injection assembly 11 on the side away from the first plate 21 and communicated with the internal flow channel of the second plate 22, and the second plate 22 is provided with a hot runner plate 24 for heating and keeping warm of the injection fluid at the cavity of the first plate 21. The hot runner plate 24 can heat the incoming injection fluid to ensure it is in a molten state and avoid flow channel during injection fluid circulation.

[0032] Further, the hot runner plate 24 includes a heating cavity 241 for treating injection fluid, and the hot runner plate 24 is provided with a hot nozzle assembly 243 for flowing injection fluid. The hot nozzle assembly 243 can accommodate injection fluid flow.

[0033] Further, the hot runner plate 24 is provided with a heating assembly 242 for heating injection fluid, and as a preferred embodiment of the present scheme but not limited, the heating part of the heating assembly 242 is arranged inside the heating cavity 241, and the heating assembly 242 is arranged inside the heating cavity 241, which can heat the injection fluid and also heat and keep warm the hot nozzle assembly 243.

[0034] Further, the heating assembly 242 includes a heating part 2421 arranged inside the heating cavity 241 and a connection part 2422 for connecting power supply, and as a preferred embodiment of the present scheme but not limited, the heating part 2421 is provided with a plurality of heating pipes, and the heating part 2421 is a ring-shaped heating pipe. In the embodiment, the heating pipe 2421 is provided with six heating pipes, which are symmetrically arranged on the upper and lower sides, three of which are close to the bottom end of the heating cavity 241, and the other three are close to the top end of the heating cavity 241. Among them, the two heating pipes at the bottom end of the heating cavity 241 are ring-shaped pipes surrounding the hot nozzle assembly 243, one of which is arranged below the feed port 211, and the other three are arranged correspondingly at the top end of the heating cavity 241.

[0035] Further, the upper mold assembly 2 is provided with a needle valve assembly 244 cooperating with the hot nozzle assembly 243 for controlling the flow of injection fluid, the hot nozzle assembly 243 comprising a flow guide part 2431 for flowing injection fluid and a nozzle part 2432 for injecting injection fluid corresponding to the position of the internal flow channel of the flow guide part 2431, a heat preservation part 2433 for heat preservation and flow guide of injection fluid being connected between the flow guide part 2431 and the nozzle part 2432 and communicating with the internal flow channels of the flow guide part 2431 and the nozzle part 2432, the needle valve assembly 244 comprising a valve needle 2441 for controlling the injection speed cooperating with the nozzle part 2432 and a cylinder 2442 for driving the valve needle 2441, the valve needle 2441 being arranged at the internal flow channel cavity of the hot nozzle assembly 243 and capable of controlling the opening and closing of the nozzle part 2432. The flow guide part 2431 can guide the heated and preserved injection fluid into its interior, and the injection fluid can be transmitted to the injection cavity in the injection assembly 11 through the nozzle part 2432.

[0036] Further, the position of the needle valve assembly 244 can be set according to actual conditions, which is a preferred embodiment of the present scheme but not a limitation, and the cylinder 2442 is partially arranged on the first plate 21 and partially arranged on the hot runner plate 24 according to the need of the installation position.

[0037] Further, the upper mold assembly 2 is provided with a socket 221 for connecting with a power source, which is a preferred embodiment of the present embodiment but not a limitation, the socket 221 being arranged on the side of the second plate 22, the socket 221 being electrically connected with the on-off part 2422 through the channel in the second plate 22 to provide energy input for the heating assembly 242.

[0038] Further, as a preferred embodiment of the present scheme but not a limitation, a sensor (not labeled in the figure) for detecting temperature is arranged in the heating cavity 241, the sensor being capable of detecting the temperature inside the hot runner plate 24 and monitoring the state of the injection fluid in real time.

[0039] Further, the first plate 21 is internally provided with a pipeline for providing air intake for the cylinder 2442 of the needle valve assembly 244, and the upper mold assembly 2 is further provided with an opening and closing sequence valve 212 for controlling the opening and closing sequence of the hot nozzle assembly 243, the opening and closing sequence valve 212 being capable of controlling the opening and closing of the hot nozzle assembly 243 according to the actual situation during the injection process, thereby controlling the pressure of the injection fluid during the injection process. As a preferred embodiment of the present scheme but not a limitation, the opening and closing sequence valve 212 is arranged on the side of the first plate 21.

[0040] In the embodiment, the lower mold assembly 1 comprises a base 12 and an injection seat 13 connected with the base 12 for providing a space for accommodating the injection assembly 11.

[0041] Further, the injection assembly 11 is provided with a positioning hole 111 corresponding to the position of the nozzle part 2432.

[0042] Further, the second plate 22 is provided with a positioning column 222 for positioning the closed position of the upper mold assembly 2 and the lower mold assembly 1, and the injection seat 13 is provided with a positioning hole 131 matched with the positioning column 222.

[0043] Further, the base 12 is provided with an ejection part 121 for ejecting the mold, and the injection assembly 11 is provided with a matching part 112 matched with the ejection part 121.

[0044] In the embodiment, the injection assembly 11 comprises a plurality of injection cavities.

[0045] The working principle of the embodiment is as follows:

[0046] The hot runner injection mold comprises a first plate 21, a second plate 22, a hot runner plate 24, a heating assembly 242, a nozzle assembly 243 and a needle valve assembly 244.

[0047] The injection fluid enters the upper mold assembly 2 from the feeding port 211, enters the hot runner plate 24 through the first plate 21, the heating assembly 242 in the hot runner plate 24 heats and keeps the injection fluid, then the injection fluid is transmitted to the nozzle part 2432 from the flow guide part 2431 of the nozzle assembly 243, the valve needle 2441 of the needle valve assembly 244 matches the nozzle part 2432 to control the injection speed of the injection fluid, and the heat preservation part 2433 between the flow guide part 2431 and the nozzle part 2432 keeps the injection fluid, which can avoid the generation of flow channel and reduce the injection pressure.

Claims

1. A hot runner injection mold characterized by, The application relates to a mold assembly, which comprises a lower mold assembly (1) and an upper mold assembly (2) matched with the lower mold assembly (1) to complete injection molding, the lower mold assembly (1) comprises an injection assembly (11) for completing injection molding, the upper mold assembly (2) comprises a feeding port (211) for feeding injection fluid and a hot runner plate (24) for heating treatment of the injection fluid, the hot runner plate (24) is internally provided with a heating cavity (241) for containing the injection fluid and communicated with the feeding port (211), the hot runner plate (24) is provided with a plurality of heating assemblies (242) for heating the injection fluid, and the heating cavity (241) is internally provided with a plurality of hot nozzle assemblies (243) for flowing the injection fluid to the injection assembly (11).

2. The hot runner injection mold of claim 1, wherein The heating assembly (242) comprises a heating part (2421) for heating the injection fluid and a connecting part (2422) connected with the heating part (2421) and used for connecting power supply, and the heating part (2421) is arranged inside the heating cavity (241).

3. A hot runner injection mold in accordance with claim 2 wherein, The heating part (2421) is a heating pipeline surrounding the hot nozzle assembly (243).

4. The hot runner injection mold of claim 1, wherein The hot nozzle assembly (243) comprises a flow guide part (2431) for flowing the injection fluid and a nozzle part (2432) corresponding to an internal flow channel of the flow guide part (2431) and used for injecting the injection fluid, and a heat preservation part (2433) for heat preservation and flow guide of the injection fluid is connected between the flow guide part (2431) and the nozzle part (2432) and communicated with internal flow channels of the flow guide part (2431) and the nozzle part (2432).

5. The hot runner injection mold of claim 4, wherein, The upper mold assembly (2) is provided with a needle valve assembly (244) matched with the hot nozzle assembly (243) and used for controlling the flow of the injection fluid, the needle valve assembly (244) comprises a valve needle (2441) matched with the nozzle part (2432) and used for controlling the flow of the injection fluid and a cylinder (2442) for driving the valve needle (2441).

6. The hot runner injection mold of claim 4, wherein, The injection assembly (11) is provided with a positioning hole (111) corresponding to the position of the nozzle part (2432), and the positioning hole (111) is communicated with an internal injection cavity of the injection assembly (11).

7. The hot runner injection mold of claim 1, wherein, The upper mold assembly (2) comprises a first plate (21) and a second plate (22) connected with the first plate (21), the second plate (22) is provided with a cavity for containing the hot runner plate (24), and the feeding port (211) is arranged on the first plate (21).

8. The hot runner injection mold of claim 2, wherein, The upper mold assembly (2) is provided with a socket (221) for connecting with power supply, and the socket (221) is electrically connected with the connecting part (2422).

9. The hot runner injection mold of claim 1 wherein, The upper mold assembly (2) is provided with an opening and closing sequence valve (212) for controlling the opening and closing sequence of the hot nozzle assembly (243).

10. The hot runner injection mold of claim 7, wherein, The lower mold assembly (1) comprises a base (12) and an injection seat (13) connected with the base (12) and used for mounting the injection assembly (11), the second plate (22) is provided with a positioning column (222) for positioning the mold closing position of the upper mold assembly (2) and the lower mold assembly (1), and the injection seat (13) is provided with a positioning hole (131) matched with the positioning column (222).

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