CN-224224432-U - Multitube connects injection mold structure

Abstract

The utility model discloses a multi-joint injection mold structure which comprises an upper mold body, a lower mold body, two supporting seats, a mold bottom plate and a top cover plate, wherein a first hot runner and a second hot runner are respectively arranged at two hot nozzles of a hot runner seat, a first-stage hot sprue is arranged at one end of the first hot runner, a second-stage hot sprue is arranged at an inner cavity of the hot sprue, an inclined air guide channel communicated with the second-stage hot sprue is arranged in a side wall of the first-stage hot sprue, one end of the inclined air guide channel is communicated with an exhaust strip, and one end of the exhaust strip extends to the top surface of the first hot runner. According to the utility model, the inclined air guide channel communicated with the second-stage hot sprue is arranged in the side wall of the first-stage hot sprue, one end of the inclined air guide channel is communicated with the exhaust strip, and one end of the exhaust strip extends to the top surface of the first hot runner, so that when molten raw materials are injected, gas in the first-stage hot sprue can be discharged, the gas is prevented from entering the cavity along the second-stage hot sprue, and the defect phenomenon in the product is avoided.

Inventors

• MA QINJIAN
• LI QI
• YUE JUN

Assignees

• 宁波勤杰模具有限公司

Dates

Publication Date

20260512

Application Date

20250523

Claims (6)

1. 1. The utility model provides a multitube connects injection mold structure, includes mould body (1), bed die body (2), two supporting seat (3), mould bottom plate (4) and lamina tecti (6), go up mould body (1) and bed die body (2) compound die and be connected, bed die body (2) are through two supporting seat (3) and mould bottom plate (4) bolted connection, a serial communication port, locating ring (11) are installed in top center department of lamina tecti (6), the inboard of locating ring (11) is provided with hot runner seat (12) that are located lamina tecti (6) bottom, first hot runner (13) and second hot runner (14) are installed respectively to two hot runner seats (12), one end that first hot runner (13) was installed one-level hot runner (15), one-level hot runner's inner chamber department of chewing (15) is installed second grade hot runner (20), set up in the lateral wall of one-level hot runner (15) and is chewed (20), the slant top of leading air flue (18) of leading of connecting second grade hot runner (19) extends one end (18) to one side of leading air flue (18).
2. 2. The multi-joint injection mold structure according to claim 1, wherein a heating ring (16) is wound on the top surface of the first hot runner (13), and an external power line (17) is mounted at the lead end of the heating ring (16).
3. 3. The multi-joint injection mold structure according to claim 2, wherein two sides of the top end of the upper mold body (1) are provided with filler strip parts (5), two filler strip parts (5) are connected with the top end of the top cover plate (6), a gap is formed between the top cover plate (6) and the top end of the upper mold body (1), and an external power line (17) is arranged in the gap.
4. 4. The multi-joint injection mold structure according to claim 1, wherein flange connecting portions (7) extend from bottoms of two sides of the upper mold body (1), concave edge butt joint portions (8) are formed at tops of two sides of the lower mold body (2), and the flange connecting portions (7) are inserted into the concave edge butt joint portions (8).
5. 5. The multi-joint injection mold structure according to claim 1, wherein an opening plate (9) is arranged at the top end of the mold bottom plate (4), and a plurality of core inserts (10) are arranged on the opening plate (9) to connect a cavity formed by the upper mold body (1) and the lower mold body (2) in a mold closing mode.
6. 6. The multi-joint injection mold structure according to claim 1, wherein an included angle between a center line of the inclined air guide passage (19) and a center line of the primary heat pump nozzle (15) is not more than 25 degrees.

Description

Multitube connects injection mold structure Technical Field The utility model relates to a multi-pipe joint injection mold structure, and belongs to the technical field of injection molds. Background Injection molding is a processing method used in mass production of parts with complex shapes, specifically, injection molding is performed by injecting heated and melted plastic into a mold cavity by an injection molding machine under high pressure, cooling and solidifying to obtain a molded product, and in the production process of the multi-pipe joint, in order to ensure the size and the product quality, injection molding is performed by adopting an injection mold, and the prior art is, for example, a pipe joint injection molding mold provided by patent number CN 202321858680.1. The injection molding die for the pipeline joint comprises an upper top plate, a pouring joint plate, a pouring die assembly, at least one core assembly, a pouring middle rotating plate, a demolding assembly for demolding the die which is poured in the pouring die, a demolding driving assembly for driving the demolding assembly to move and a lower bottom plate. The injection mold disclosed above has the disadvantage that when in use, the pouring gate is arranged to pass through the pouring transfer port and enter the pouring mold assembly, but in the process of entering the molten plastic, high-pressure gas is compressed into the cavity, so that internal defects of the product are easily caused, and therefore, a multi-pipe joint injection mold structure is designed. Disclosure of utility model The utility model aims to provide a multi-joint injection mold structure for solving the problems in the background art. The multi-joint injection mold structure comprises an upper mold body, a lower mold body, two supporting seats, a mold bottom plate and a top cover plate, wherein the upper mold body is connected with the lower mold body in a mold closing mode, the lower mold body is connected with the mold bottom plate through the two supporting seats in a bolt mode, a positioning ring is installed at the center of the top end of the top cover plate, a hot runner seat positioned at the bottom end of the top cover plate is arranged on the inner side of the positioning ring, a first hot runner and a second hot runner are installed at two hot nozzles of the hot runner seat respectively, a first-stage hot nozzle is installed at one end of the first hot runner, a second-stage hot nozzle is installed at the inner cavity of the first-stage hot nozzle, an inclined air guide channel communicated with the second-stage hot nozzle is formed in the side wall of the first-stage hot nozzle, one end of the inclined air guide channel is communicated with an exhaust strip, and one end of the exhaust strip extends to the top surface of the first hot runner. In the above-mentioned multitube connects injection mold structure, the top surface winding of first hot runner is provided with the heating collar, external power cord is installed to the lead wire end of heating collar. In the above-mentioned multitube connects injection mold structure, the filler strip portion is all installed to the both sides side on last mould body top, two filler strip portion is connected with the top of lamina tecti and makes lamina tecti and the top of last mould body produce the clearance and with external power cord setting in this clearance. In the above-mentioned multitube connects injection mold structure, the flange connecting portion has all been extended to the bottom of last mould body both sides, concave edge butt joint portion is all seted up at the top of lower mould body both sides, flange connecting portion inserts in concave edge butt joint portion. In the multi-pipe joint injection mold structure, the top end of the mold bottom plate is provided with the mold opening plate, and the mold opening plate is provided with a plurality of mold core inserts which are connected with a mold cavity formed by the mold body and the lower mold body in a mold closing mode. In the above-mentioned multi-joint injection mold structure, the included angle between the center line of the oblique air guide channel and the center line of the primary hot sprue is not more than 25 degrees. Compared with the prior art, the utility model has the beneficial effects that: 1. According to the multi-joint injection mold structure, the inclined air guide channel communicated with the second-stage hot sprue is formed in the side wall of the first-stage hot sprue, one end of the inclined air guide channel is communicated with the exhaust strip, and one end of the exhaust strip extends to the top surface of the first hot sprue, so that when molten raw materials are injected, gas in the first-stage hot sprue can be discharged, the gas is prevented from entering the cavity along the second-stage hot sprue, defects in the product are avoided, meanwhile, the heating ring is wound on the top surface of t