Multi-mold-core injection mold

Abstract

The utility model relates to the technical field of molds, in particular to a multi-mold-core injection mold. The mold comprises an upper mold and a lower mold, a plurality of mold core inserts are arranged on the upper mold and the lower mold, a plurality of runners communicated with the mold core inserts are further arranged on the upper mold and the lower mold, and the runners comprise a main runner, a first-stage sub-runner, a second-stage sub-runner and sub-runners communicated with the mold core inserts; the main runner is communicated with the first-stage sub-runner, the first-stage sub-runner is communicated with the second-stage sub-runner, and the second-stage sub-runner is communicated with the sub-runner; the integral connecting structure of the first-stage sub-runner, the second-stage sub-runner and the sub-runner is of a tree-shaped structure; a main sprue gate is formed in the center of the main runner; and the end head of the main runner is communicated with the primary sub-runner. The runner structure is compact in arrangement, the length of the runner and the sizes of the main runner and the first-stage sub-runner are reduced to a great extent, and the proportion of the runner in the total mold weight is reduced, so that the material cost of raw materials is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould technical field, concretely relates to a multi -cavity injection mold. BACKGROUND

[0002] The existing injection mold when injection molding some small products, in order to improve efficiency, often set multiple forming cavities on a mold, but its runner structure is relatively single, can only be formed into the cavity through the pouring gate along the runner, the forming quality of the forming cavity located at the rear side of the runner is often uneven, and the forming effect is poor, and the traditional product arrangement and shunt runner adopt I-shaped shunt runner right-angle rotation, for 32-hole multi-hole products, the runner arrangement reflects that the runner is too long, and raw material cost is wasted. UTILITARIAN CONTENT

[0003] In view of the above technical problems, the utility model solves the problem of the runner being too long and raw material cost being wasted by the runner arrangement, and provides a multi-cavity injection mold.

[0004] To solve the above technical problems, the technical scheme provided by the utility model is: a multi-cavity injection mold, comprising an upper mold and a lower mold, a plurality of mold core inserts are arranged on the lower mold, and a plurality of runners communicating with the mold core inserts are further arranged on the upper mold, the runner comprises a main runner, a first shunt runner, a second shunt runner and a sub-runner communicating with the mold core insert, the main runner communicates with the first shunt runner, the first shunt runner communicates with the second shunt runner, and the second shunt runner communicates with the sub-runner, the overall connection structure of the first shunt runner, the second shunt runner and the sub-runner is in a tree shape, a main pouring gate is arranged at the center of the main runner, and the end of the main runner communicates with the first shunt runner.

[0005] Further, in the above multi-cavity injection mold, the sub-runner corresponds to the mold core insert one by one.

[0006] The main runner is in a cross shape as a whole, the main pouring gate is at the center of the cross, the first shunt runner is in a right angle shape, the main runner communicates with the right angle of the first shunt runner, the second shunt runner is in a U shape, the center of the U-shaped lower bottom of the first shunt runner communicates with the second shunt runner, and the sub-runner is in a U shape, and the center of the U-shaped lower bottom of the second shunt runner communicates with the sub-runner.

[0007] The longitudinal section of the main runner is also U-shaped, and the longitudinal sections of the first sub-runner, the second sub-runner and the sub-runner are all circular. If the main runner is a cold runner, the U-shaped longitudinal section of the main runner meets the positioning requirements of the main injection inlet nipple; if the main runner is a cold runner or a hot runner, the U-shaped longitudinal section of the main runner facilitates the sucking disc to be taken out, i.e. the U-shaped longitudinal section of the main runner is easier to process. The longitudinal sections of the first sub-runner, the second sub-runner and the sub-runner are all circular, and the plastic liquid has smaller resistance and pressure loss when flowing in the flow channel with a circular longitudinal section, which is preferred in this design.

[0008] The mold core insert is provided with a narrow end and a wide end, and the narrow end communicates with the sub-runner. The mold core inserts are arranged uniformly.

[0009] Compared with the prior art, in the above-mentioned multi-mold core injection mold, the upper mold and the lower mold are provided with a plurality of mold core inserts and a plurality of flow channels communicating with the mold core inserts, respectively. The flow channels include a main runner, a first sub-runner, a second sub-runner and a sub-runner communicating with the mold core insert. The main runner communicates with the first sub-runner, the first sub-runner communicates with the second sub-runner, and the second sub-runner communicates with the sub-runner. The overall connection structure of the first sub-runner, the second sub-runner and the sub-runner is in a tree shape. The center of the main runner is provided with a main pouring gate. The flow channel structure is compact in arrangement, greatly reduces the length of the flow channel and the size of the main runner and the first sub-runner, reduces the proportion of the flow channel in the total mold weight, and saves the cost of raw materials. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a flow channel arrangement structure diagram of the multi-mold core injection mold.

[0011] Wherein: 1 mold core insert, 2 main runner, 3 first sub-runner, 4 second sub-runner, 5 sub-runner, 6 main pouring gate. DETAILED DESCRIPTION

[0012] In order to facilitate those skilled in the art to understand, the utility model will be further described in detail in combination with the drawings and embodiments.

[0013] As Figure 1The utility model provides a multi -mode core injection mold, including the upper die and the lower die, be equipped with a plurality of mould core inserts 1 on the lower die, still be equipped with a plurality of with the flow channel of mould core insert on the upper die, the flow channel include main flow channel 2, first flow channel 3, two -level flow channel 4 and with the sub -flow channel 5 of mould core insert, the main flow channel with first flow channel, the first flow channel with two -level flow channel, two -level flow channel with sub -flow channel, the first flow channel with two -level flow channel and sub -flow channel are tree -shaped structure, the center of main flow channel is equipped with main gate 6, and the end of main flow channel is communicated with first flow channel, the sub -flow channel with mould core insert one -to -one correspondence, the main flow channel is whole and presents cross -shaped, and the cross center is main gate 6, the first flow channel presents right angle, and the right angle of main flow channel and first flow channel is communicated, the two -level flow channel presents U shape, and the center of the U shape lower bottom of first flow channel and two -level flow channel is communicated, the sub -flow channel presents U shape, and the center of the U shape lower bottom of two -level flow channel and sub -flow channel is communicated, the longitudinal section of main flow channel also presents U shape, and the longitudinal section of first flow channel, two -level flow channel and sub -flow channel is all circular, the mould core insert is equipped with narrow end and wide end, and the narrow end with sub -flow channel is communicated, and the mould core insert is arranged evenly.

[0014] The utility model discloses a multi -mode core injection mold, including the upper die and the lower die, be equipped with a plurality of mould core inserts 1 on the lower die, still be equipped with a plurality of with the flow channel of mould core insert on the upper die, the flow channel include main flow channel 2, first flow channel 3, two -level flow channel 4 and with the sub -flow channel 5 of mould core insert, the main flow channel with first flow channel, the first flow channel with two -level flow channel, two -level flow channel with sub -flow channel, the first flow channel with two -level flow channel and sub -flow channel are tree -shaped structure, the center of main flow channel is equipped with main gate 6, and the end of main flow channel is communicated with first flow channel, the sub -flow channel with mould core insert one -to -one correspondence, the main flow channel is whole and presents cross -shaped, and the cross center is main gate 6, the first flow channel presents right angle, and the right angle of main flow channel and first flow channel is communicated, the two -level flow channel presents U shape, and the center of the U shape lower bottom of first flow channel and two -level flow channel is communicated, the sub -flow channel presents U shape, and the center of the U shape lower bottom of two -level flow channel and sub -flow channel is communicated, the longitudinal section of main flow channel also presents U shape, and the longitudinal section of first flow channel, two -level flow channel and sub -flow channel is all circular, the mould core insert is equipped with narrow end and wide end, and the narrow end with sub -flow channel is communicated, and the mould core insert is arranged evenly.

[0015] Obviously, the above-mentioned embodiments of the utility model are only for clearly illustrating the utility model, and not limit the embodiments of the utility model. For ordinary skilled in the art, on the basis of the above-mentioned, can make other different forms of change or change. Here do not need to be exhausted to all the embodiments. Any modification, equivalent replacement and improvement etc. in the spirit and principle of the utility model, should be included in the protection scope of the utility model claims.

Claims

1. A multi-cavity injection mold comprising an upper mold and a lower mold, the lower mold being provided with a plurality of mold core inserts (1), and the upper mold being provided with a plurality of flow channels communicating with the mold core inserts, characterized in that: the flow channels comprise a main flow channel (2), a first-stage sub-flow channel (3), a second-stage sub-flow channel (4), and a sub-flow channel (5) communicating with the mold core inserts; the main flow channel communicates with the first-stage sub-flow channel, the first-stage sub-flow channel communicates with the second-stage sub-flow channel, and the second-stage sub-flow channel communicates with the sub-flow channel; the overall connection structure of the first-stage sub-flow channel, the second-stage sub-flow channel, and the sub-flow channel is in a tree shape; the center of the main flow channel is provided with a main gate (6), and the end of the main flow channel communicates with the first-stage sub-flow channel; the sub-flow channel corresponds to the mold core insert one-to-one; the main flow channel is in a cross shape as a whole, and the center of the cross is the main gate (6); the first-stage sub-flow channel is in a right angle shape, and the right angle of the main flow channel communicates with the first-stage sub-flow channel; the second-stage sub-flow channel is in a U shape, and the center of the U-shaped lower base of the first-stage sub-flow channel communicates with the second-stage sub-flow channel; the sub-flow channel is in a U shape, and the center of the U-shaped lower base of the second-stage sub-flow channel communicates with the sub-flow channel; the longitudinal section of the main flow channel is also in a U shape, and the longitudinal sections of the first-stage sub-flow channel, the second-stage sub-flow channel, and the sub-flow channel are all in a circular shape; the mold core insert is provided with a narrow end and a wide end, and the narrow end communicates with the sub-flow channel; and the mold core inserts are arranged uniformly. ​ ​ ​ ​ 2. The multi-cavity injection mold of claim 1, wherein; ​ 3. The multi-cavity injection mold of claim 2, wherein; ​ 4. The multi-cavity injection mold of claim 3, wherein; ​ 5. The multi-cavity injection mold of claim 4, wherein; ​ 6. The multi-cavity injection mold of claim 5, wherein; ​ 7. The multi-cavity injection mold of claim 6, wherein; ​ 8. The multi-cavity injection mold of claim 7, wherein; ​ 9. The multi-cavity injection mold of any of claims 1-8, wherein: ​

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