CN-121973409-A - Blowing demoulding structure of injection mould

CN121973409ACN 121973409 ACN121973409 ACN 121973409ACN-121973409-A

Abstract

The injection mold blowing demolding structure comprises an upper compound plate and a lower compound plate, wherein a fixed template is arranged below the upper compound plate, a perforation is formed in the lower compound plate, a mold foot and an ejection assembly are arranged on the lower compound plate, a push rod of an injection molding machine penetrates through the perforation to be matched with the ejection assembly, a movable template is arranged on the mold foot, a convex core block is arranged on the movable template, a stripper plate is arranged on the movable template, a through hole is formed in the stripper plate, a clamping groove is formed in the upper part of the through hole, a mold cavity is formed between the stripper plate, the core block and the fixed template, a plastic piece is arranged in the mold cavity, a downward flanging is arranged around the plastic piece, a baffle is arranged on the outer wall of the flanging, a foot is arranged on the lower part of the baffle and clamped into the clamping groove of the stripper plate, an air inlet hole is formed in the movable template, an air blowing seat is arranged in the movable template, an air vent hole and an air vent hole are formed in the air blowing seat, and the air vent is communicated with the air vent, and the air vent corresponds to the through hole and the inner wall of the lower part of the plastic piece.

Inventors

LIANG ZHENGHUA
LI MAOMING

Assignees

浙江凯华模具有限公司

Dates

Publication Date: 20260505
Application Date: 20260326

Claims (4)

1. The blowing demoulding structure of the injection mould is characterized by comprising an upper compound plate (1) and a lower compound plate (2), wherein a fixed mould plate (3) is arranged below the upper compound plate (1), a through hole (22) is formed in the lower compound plate (2), a mould foot (4) is arranged on the lower compound plate (2) between the mould feet (4), an ejection assembly is arranged on the lower compound plate (2), an ejector rod (5) of the injection mould passes through the through hole (22) to be matched with the ejection assembly, a movable mould plate (6) is arranged on the mould foot (4), a convex core block (7) is arranged on the movable mould plate (6), a stripper plate (8) is arranged on the movable mould plate (6), a through hole (9) is formed in the stripper plate (8), the inner wall of the through hole (9) is matched with the outer wall of the core block (7), a clamping groove (10) is formed in the upper part of the through hole (9), a mould cavity is formed between the stripper plate (8) and the fixed mould plate (3), a plastic piece (11) formed in the mould cavity, a plastic piece (11) is arranged on the mould cavity, a convex bottom foot (11) is arranged on the movable mould plate (6), a flange (12) is arranged on the periphery of the lower baffle plate (13), the lower baffle plate (13) is arranged on the lower baffle plate (13) and the lower baffle plate (13), the foot (14) is clamped into the clamping groove (10) of the stripper plate (8), the movable mold plate (6) is provided with an air inlet hole (15), the movable mold plate (6) is provided with an air blowing seat (16), the air blowing seat (16) is provided with an air vent (17) and an air vent (18), the air inlet hole (15) is communicated with the air vent (17), the air vent (17) is communicated with the air vent (18), and the air vent (18) is corresponding to the through hole (9) and the inner wall of the lower part of the plastic part (11).
2. The blowing demolding structure of the injection mold according to claim 1, wherein the ejection assembly comprises an upper ejector plate (19) and a lower ejector plate (20), the ejector rod (5) of the injection molding machine passes through the perforation (22) to be in contact with the lower ejector plate (20), ejector pins (21) are arranged on the upper ejector plate (19) and the lower ejector plate (20), and the ejector pins (21) pass through the movable mold plate (6) to be connected with the stripper plate (8).
3. The blowing and demolding structure of an injection mold according to claim 1, wherein the blowing hole (18) is formed in an inclined upward conical shape, and the aperture of the inlet is larger than that of the outlet.
4. The blowing and demolding structure of an injection mold according to claim 1, wherein the number of the blowing holes (18) is more than two.

Description

Blowing demoulding structure of injection mould Technical Field The invention relates to an injection mold, in particular to an air blowing demolding structure of the injection mold. Background After injection molding of plastic parts is completed by adopting an injection mold, the plastic parts are usually required to be ejected and demolded from a movable mold plate of the mold through an ejection structure, wherein the ejection structure usually adopts an ejector plate, ejector pins are arranged on the ejector plate, and the ejector pins are used for directly ejecting and demolding the plastic parts or are used for driving a stripper plate to eject and demold the plastic parts. If the plastic part to be injection molded is provided with downward flanging all around, the outer wall of the flanging is provided with a baffle, the bottom of the baffle is provided with convex feet, a cavity is formed between the flanging all around, the cavity is quite large in packing force to the core block of the movable mould plate, the ejector pins are adopted to directly eject the plastic part, deformation of the plastic part is easy to occur when the plastic part is ejected, so that the plastic part cannot be ejected and demoulded, the baffle all around is pushed by the ejector pins, the plastic part is ejected from the core block of the movable mould plate, the bottom of the plastic part is clamped on the stripper plate, the plastic part is ejected from the stripper plate by the secondary ejection structure, the secondary ejector pins are arranged on the secondary ejector pins, the outer wall of the movable mould plate is provided with a secondary ejection control structure, the ejector pins and the stripper plate stop moving after the stripper plate ejects the plastic part, the secondary ejector pins are controlled by the secondary ejector pins to eject the plastic part upwards through the control structure of the secondary ejector pins, the structure is quite complex, development cost of the mould is improved, the secondary ejection control structure is required, the installation space of the secondary ejector pins is complex, and the whole mould is not easy to design and compact, and the whole mould is difficult to debug. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides an injection mold blowing demolding structure which can realize secondary demolding of plastic parts in a pneumatic mode, effectively simplify the mold structure and reduce the development cost of the mold. The technical scheme of the injection mold blowing demolding structure comprises an upper compound plate and a lower compound plate, wherein a fixed mold plate is arranged below the upper compound plate, a perforation is formed in the lower compound plate, a mold foot is arranged on the lower compound plate, an ejection assembly is arranged on the lower compound plate between the mold feet, an ejector rod of an injection molding machine penetrates through the perforation to be matched with the ejection assembly, a movable mold plate is arranged on the mold foot, a protruding core block is arranged on the movable mold plate, a stripping plate is arranged on the movable mold plate, a through hole is formed in the stripping plate, the inner wall of the through hole is matched with the outer wall of the core block, a clamping groove is formed in the upper part of the through hole, a mold cavity is formed among the stripping plate, the core block and the fixed mold plate, injection molded plastic parts are arranged in the mold cavity, downward flanging is arranged around the plastic parts, a baffle is arranged on the outer wall of the flanging, the lower surface of the baffle is contacted with the stripping plate, a protruding foot is arranged on the lower part of the baffle, the baffle is clamped into the clamping groove of the stripping plate, a convex core block is arranged in the movable mold plate, a blowing seat is arranged, a vent hole and a vent hole is arranged in the blowing seat, the vent hole is communicated with the vent hole and the vent hole are communicated with the vent hole and the vent hole. Further, the ejection assembly comprises an upper ejector plate and a lower ejector plate, the ejector rods of the injection molding machine penetrate through the perforations to be in contact with the lower ejector plate, ejector pins are arranged on the upper ejector plate and the lower ejector plate, and the ejector pins penetrate through the movable mould plate to be connected with the stripper plate. Further, the air blowing hole is conical in shape with an upward inclination, and the aperture of the inlet is larger than that of the outlet. Further, the number of the air blowing holes is more than two. The blowing demolding structure of the injection mold has the beneficial effects that the traditional secondary ejector pin structure is replaced in a pneumatic mode, so that plastic parts can b