Multi-cavity injection mold

Abstract

The utility model discloses a multi-cavity injection mold which comprises a lower mold assembly used for bearing injection molding and an upper mold assembly matched with the lower mold assembly and used for circulating injection molding fluid, and an injection molding assembly used for injecting the injection molding fluid is arranged on the lower mold assembly. The injection molding assembly comprises a lower mold core and an upper mold core matched with the lower mold core to form a plurality of injection molding cavities, the lower mold core is provided with an injection molding runner used for circulating injection molding fluid, and the lower mold core is provided with a control piece used for controlling connection and disconnection between the injection molding runner and the injection molding cavities. The control part is arranged in the injection molding assembly and can control connection and disconnection between the injection molding runner and the injection molding cavity, the number of products generated through one-time injection molding is controlled by controlling the situation that injection molding fluid entering the injection molding assembly flows into the injection molding cavity, waste of injection molding materials can be prevented, and the actual requirement can be met.

Description

TECHNICAL FIELD

[0002] The utility model relates to injection mold technical field especially relates to a multi-cavity injection mold.

BACKGROUND

[0004] Injection mold is important process equipment for producing various industrial products, with the rapid development of plastic mold design industry and the popularization and application of plastic products in aerospace, electronics, machinery, ship and automobile industries, the market demand for injection mold is also higher and higher. For example, the number of piano keys in the injection of electronic piano is different. The piano keys of electronic piano are usually made of plastic material and are produced by injection mold, the piano keys of electronic piano include black keys and white keys, and the shape is rectangular, so when designing the injection mold for the piano keys of electronic piano, the multiple cavities of the mold are generally arranged in matrix, and multiple injection holes are arranged in matrix along the length direction and width direction of the mold. However, when the number of products that can be injection molded at one time is fixed, the number of injection molded products is more or less than the actual required number of products, which affects the consumption of materials and actual demand.

SUMMARY OF THE UTILITY MODEL

[0006] To solve the above technical problems, the utility model provides a multi-cavity injection mold.

[0007] The utility model realizes by following technical scheme:

[0008] A multi-cavity injection mold, comprising a lower mold assembly for bearing injection and an upper mold assembly for circulating injection fluid, which cooperates with the lower mold assembly, the lower mold assembly is provided with an injection assembly for injection fluid, the injection assembly comprises a lower mold core and an upper mold core which cooperates with the lower mold core to form multiple injection cavities, the lower mold core is provided with an injection runner for circulating injection fluid, and the lower mold core is provided with a control member for controlling the on-off between the injection runner and the injection cavity.

[0009] The control member can be detachably arranged on the lower mold core and can block the injection runner, and the control member is provided with a control runner for forming a circulating runner with the injection runner.

[0010] The control member is a block structure for blocking the injection runner, and the control runner is a U-shaped groove runner connected with the injection runner.

[0011] The lower mold core is provided with a flow guide channel connected with the injection runner for guiding the injection fluid to the injection cavity, and the upper mold core is provided with an injection port for circulating the injection fluid to the injection runner.

[0012] A multi-cavity injection mold as described above, the upper mold assembly includes a first plate for flowing injection fluid and a feed port provided on the first plate and communicated with the internal flow channel thereof, and a second plate connected to the side away from the feed port and communicated with the internal flow channel of the first plate.

[0013] A multi-cavity injection mold as described above, the first plate is provided with a first needle valve for changing the cross-sectional area of the flow channel of the flow channel and a first cylinder for controlling the first needle valve, and the second plate is provided with a control plate for flowing and processing injection fluid, and the control plate is provided with a second needle valve for changing the cross-sectional area of the flow channel of the flow channel and a second cylinder for controlling the second needle valve.

[0014] A multi-cavity injection mold as described above, the upper mold core is provided with a positioning hole corresponding to the positions of the first needle valve and the second needle valve.

[0015] A multi-cavity injection mold as described above, the second plate is connected to the side away from the feed port and communicated with the internal flow channel of the second plate, and the third plate has a cavity, and the upper mold core is installed in the cavity of the third plate.

[0016] A multi-cavity injection mold as described above, the lower mold assembly includes a base and an injection seat connected to the base for providing a space for accommodating the injection assembly.

[0017] A multi-cavity injection mold as described above, the second plate is provided with a positioning column for positioning the mold closing 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.

[0018] Compared with the prior art, the multi-cavity injection mold has the following beneficial effects:

[0019] 1. The control member is arranged inside the injection assembly to control the on-off between the injection flow channel and the injection cavity, which controls the flow of injection fluid into the injection cavity to control the number of products produced by one injection, prevents waste of injection material and meets the actual demand.

[0020] 2. The control member is provided with a control flow channel communicated with the injection flow channel, and the control flow channel and the injection flow channel form a closed loop circulation flow channel, which can change the number of injection products without affecting the injection, and the control member can be detachably installed on the lower mold core, and by installing the control member at different positions, the injection of multiple number of products can be ensured.

[0021] 3. The first needle valve and the second needle valve can control the flow of injection fluid in the flow guide, so that the amount and speed of injection fluid entering the mold injection cavity can be accurately controlled, thereby ensuring that the size and quality of the injection product meet the requirements. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced.

[0024] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0025] Figure 2 is Figure 1 a schematic diagram of the exploded view;

[0026] Figure 3 is a schematic diagram of the exploded view of the lower mold assembly of the present application;

[0027] Figure 4 is another schematic diagram of the exploded view of the lower mold assembly of the present application;

[0028] Figure 5 is Figure 4 a schematic diagram of the top view of part of the structure of the present application;

[0029] Figure 6 is Figure 5 an enlarged schematic diagram of the A area of the present application;

[0030] Figure 7 is Figure 5 an enlarged schematic diagram of the B area of the present application;

[0031] Figure 8 is a schematic diagram of the exploded view of the upper mold assembly of the present application;

[0032] Figure 9 is Figure 8 another schematic diagram of the present application from another perspective.

[0033] Among them, the reference signs are as follows:

[0034] 1, lower mold assembly; 11, base; 111, ejection part; 12, injection seat; 121, positioning hole; 2, upper mold assembly; 21, first plate; 211, feed port; 212, first needle valve; 213, first air cylinder; 214, opening and closing sequence valve; 22, second plate; 221, control plate; 2211, second needle valve; 2212, second air cylinder; 222, positioning column; 223, socket; 23, third plate; 3, injection assembly; 31, control part; 311, control flow channel; 32, lower mold core; 321, injection flow channel; 322, flow guide; 33, upper mold core; 331, injection port; 332, alignment hole; 34, matching part. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and do not limit the utility model.

[0037] The specific embodiments, in combination with Figures 1 to 9 as shown, further illustrate the technical solutions of the utility model. A multi-cavity injection mold comprises a lower mold assembly 1 for bearing injection and an upper mold assembly 2 for fluid flow into an injection cavity in cooperation with the lower mold assembly 1, and an injection assembly 3 for completing injection is arranged between the lower mold assembly 1 and the upper mold assembly 2. The lower mold assembly 1 and the upper mold assembly 2 cooperate and work, and after the two are clamped, injection fluid is input and flows into the injection assembly 3 through the upper mold assembly 2, and molding is completed in the injection assembly 3 with a certain structure mold.

[0038] In the embodiment, the injection assembly 3 comprises a plurality of injection cavities. As a preferred embodiment of the embodiment, the injection assembly 3 comprises four independent injection plate blocks, each of which comprises a plurality of injection cavities, can simultaneously form a plurality of different component products at one time, and can improve the productivity and utilization rate of the mold.

[0039] Further, the injection assembly 3 comprises a lower mold core 32 and an upper mold core 33 cooperating with the lower mold core 32 to form a plurality of injection cavities. The lower mold core 32 is provided with an injection flow channel 321 for flowing injection fluid and a flow guide channel 322 connected with the injection flow channel 321 for guiding the injection fluid to the injection cavity of the injection assembly 3. The injection fluid enters the injection cavity to complete the molding of the product by the injection flow channel 321 through the flow guide channel 322.

[0040] Further, the upper mold core 33 comprises an injection port 331 for flowing injection fluid to the lower mold core 32. The injection port 331 can transmit the injection fluid to the injection flow channel 321 on the lower mold core 32, and the injection fluid flows in the injection flow channel 321 until it enters the injection cavity of the injection assembly 3 through the flow guide channel 322.

[0041] Further, the injection molding assembly 3 comprises a control member 31 detachably arranged for controlling the injection flow channel 321, the control member 31 can be installed and detached to select the number of injection molded products, without affecting the normal injection molding effect, improving the functionality of the injection mold, as a preferred embodiment of the present application, but not limited to, the control member 31 is arranged on the lower mold core 32 and blocks the injection flow channel 321, the control member 31 is provided with a control flow channel 311 forming a circulating closed flow channel with the blocked injection flow channel 321. The control flow channel 311 can plan the flow path of the injection fluid, thereby controlling the number of products that can be injection molded in one injection molding.

[0042] Further, the control member 31 is a block structure for blocking the injection flow channel 321, as a preferred embodiment of the present application, but not limited to, the control member 31 can be a square block, a round block or other structures that can block the injection flow channel 321, the control flow channel 311 is a U-shaped groove flow channel connected with the injection flow channel 321, the control flow channel 311 and the injection flow channel 321 form a circulating annular groove flow channel, which can ensure the flow of injection fluid in the injection flow channel 321, while ensuring the injection fluid to enter the injection cavity and hindering the injection fluid to flow through other injection cavities, thereby controlling the number of injection molded products.

[0043] Further, the control member 31 can be arranged between the flow channels of adjacent injection cavities, and the number of injection molded products can be further planned, the control member 31 needs to be installed away from the injection port 331 to ensure the injection function of the mold base. As a preferred embodiment of the present application, but not limited to, two detachable control members 31 are used in the mold, which can injection mold three different numbers of injection molded products in one injection molding production.

[0044] In the present embodiment, the upper mold assembly 2 comprises a first plate 21 for flowing injection fluid, and a feed port 211 arranged on the first plate 21 and connected with the internal flow channel thereof, the first plate 21 is connected with a second plate 22 for flowing injection fluid on the side away from the feed port 211, the second plate 22 is connected with a third plate 23 for flowing injection fluid and providing space for accommodating the injection molding assembly 3 on the side away from the feed port 211, the second plate 22 is provided with a control plate 221 for flowing and processing injection fluid, and the upper mold core 33 is arranged in the inner cavity of the third plate 23. The third plate 23 is the moving die of the mold, which drives the upper mold core 33 to complete the mold closing and injection molding work with the lower mold core 32.

[0045] Further, the upper mold assembly 2 is provided with a needle valve for controlling the flow channel of the injection fluid and a cylinder for driving the needle valve. As a preferred embodiment of the present application, but not limited, the first plate 21 is provided with a first needle valve 212 for controlling the flow area of the injection fluid and a first cylinder 213 for driving the first needle valve 212. The control plate 221 is provided with a second needle valve 2211 for changing the cross-sectional area of the fluid passage and a second cylinder 2212 for controlling the second needle valve 2211. The upper mold core 33 is provided with a positioning hole 332 corresponding to the positions of the first needle valve 212 and the second needle valve 2211. The first needle valve 212 and the second needle valve 2211 can control the flow and speed of the injection fluid flowing through the flow guide 322 through the positioning hole 332, thereby ensuring that the size and quality of the injection product meet the requirements.

[0046] Further, the upper mold assembly 2 is provided with a socket 223 for connecting with a power supply and providing energy input for the control plate 221. The upper mold assembly 2 is also provided with an opening and closing sequence valve 214 for controlling the hot nozzle of the feeding port 211. As a preferred embodiment of the present application, but not limited, the socket 223 is arranged on the side of the first plate 21, and the opening and closing sequence valve 214 is arranged on the side of the second plate 22.

[0047] Further, as a preferred embodiment of the present application, but not limited, the control plate 221 can warm the incoming injection fluid to ensure that it is in a molten state, avoiding the flow channel affecting subsequent injection when the injection fluid flows.

[0048] In the present embodiment, the lower mold assembly 1 includes a base 11 and an injection seat 12 connected with the base 11 for providing a space for accommodating the injection assembly 3.

[0049] Further, 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. The injection seat 12 is provided with a positioning hole 121 matched with the positioning column 222. Through the cooperation between the positioning column 222 and the positioning hole 121, the cooperation between the upper mold assembly 2 and the lower mold assembly 1 can be ensured.

[0050] Further, the base 11 is provided with an ejection part 111 for ejecting the mold. The injection assembly 3 is provided with a matching part 34 matched with the ejection part 111. As a preferred embodiment of the present application, but not limited, the ejection part 111 and the matching part 34 are detachably connected.

[0051] The working principle of the present embodiment is as follows:

[0052] The utility model provides a kind of multi-cavity injection mold, by setting detachable control piece 31 in injection assembly 3, control piece 31 is connected with the control flow passage 311 of injection runner 321 by setting, to control the injection product quantity injected, its specific principle is:

[0053] Injection fluid enters upper mould assembly 2 from feed port 211, passes through first plate 21, second plate 22 and third plate 23 into injection assembly 3, control piece 31 is arranged on lower mould kernel 32 in injection assembly 3, closed loop circulation flow passage is formed by control flow passage 311 on control piece 31 and injection runner 321 on lower mould kernel 32, so that injection fluid can only enter the injection cavity inside injection assembly 3 through unrestricted flow passage to complete injection, and then the number of injection products that can be completed by one injection can be controlled, at the same time, first needle valve 212 and second needle valve 2211 can control the flow of injection fluid flowing into injection cavity through flow guide channel 322, so as to ensure that the size and quality of injection product meet the requirements.

Claims

1. A multi-cavity injection mold characterized by, The injection molding device comprises a lower mold assembly (1) for bearing injection molding and an upper mold assembly (2) for circulating injection fluid, which is matched with the lower mold assembly (1), the lower mold assembly (1) is provided with an injection molding assembly (3) for injection fluid, the injection molding assembly (3) comprises a lower mold core (32) and an upper mold core (33) matched with the lower mold core (32) to form a plurality of injection molding cavities, the lower mold core (32) is provided with an injection molding flow channel (321) for circulating injection fluid, and the lower mold core (32) is provided with a control member (31) for controlling the on-off between the injection molding flow channel (321) and the injection molding cavity.

2. A multi-cavity injection mold according to claim 1, wherein, The control member (31) is detachably arranged on the lower mold core (32) and can block the injection molding flow channel (321), and the control member (31) is provided with a control flow channel (311) for forming a circulating flow channel with the injection molding flow channel (321).

3. A multi-cavity injection mold according to claim 2, wherein, The control member (31) is a block structure for blocking the injection molding flow channel (321), and the control flow channel (311) is a U-shaped groove flow channel connected with the injection molding flow channel (321).

4. The multi-cavity injection mold of claim 1, wherein, The lower mold core (32) is provided with a flow guide channel (322) connected with the injection molding flow channel (321) for guiding the injection fluid to the injection molding cavity, and the upper mold core (33) is provided with an injection port (331) for circulating the injection fluid to the injection molding flow channel (321).

5. A multi-cavity injection mold according to claim 4, wherein, The upper mold assembly (2) comprises a first plate (21) for circulating injection fluid and a feeding port (211) arranged on the first plate (21) and communicating with the internal flow channel thereof, and the first plate (21) is connected with a second plate (22) for circulating injection fluid at a side away from the feeding port (211) and connected with the internal flow channel of the first plate (21).

6. A multi-cavity injection mold according to claim 5, wherein, The first plate (21) is provided with a first needle valve (212) for changing the fluid passage cross-sectional area of the flow guide channel (322) and a first cylinder (213) for controlling the first needle valve (212), and the second plate (22) is provided with a control plate (221) for circulating and processing injection fluid, and the control plate (221) is provided with a second needle valve (2211) for changing the fluid passage cross-sectional area of the flow guide channel (322) and a second cylinder (2212) for controlling the second needle valve (2211).

7. A multi-cavity injection mold according to claim 6, wherein The upper mold core (33) is provided with a positioning hole (332) corresponding to the positions of the first needle valve (212) and the second needle valve (2211).

8. A multi-cavity injection mold according to claim 6, wherein, The second plate (22) is connected with a third plate (23) having a cavity corresponding to the internal flow channel of the second plate (22) at a side away from the feeding port (211), and the upper mold core (33) is installed in the cavity of the third plate (23).

9. A multi-cavity injection mold according to claim 6, wherein, The lower mold assembly (1) comprises a base (11) and an injection molding seat (12) connected with the base (11) for providing a space for accommodating the injection molding assembly (3).

10. A multi-cavity injection mold according to claim 9, wherein, The second plate (22) is provided with a positioning column (222) for positioning the upper mold assembly (2) and the lower mold assembly (1) in a closed position, and the injection seat (12) is provided with a positioning hole (121) matched with the positioning column (222).

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