Search

CN-121224028-B - Multicomponent reclaimed plastic direct mixing injection molding device based on single screw extruder

CN121224028BCN 121224028 BCN121224028 BCN 121224028BCN-121224028-B

Abstract

The invention relates to the technical field of injection molding residue recovery, in particular to a multi-component recovery plastic direct mixing injection molding device based on a single-screw extruder. The plastic box comprises a support frame, an extruder body, a feed hopper, a fixed die and a movable die, wherein a male die is arranged on the inner side of the fixed die, a female die corresponding to the male die is arranged on the inner side of the movable die, a cavity capable of containing the plastic box is formed between the male die and the female die, plastic piece stabilizing mechanisms are arranged at the top and the bottom of the fixed die in an injection molding stage, the plastic piece stabilizing mechanisms are movably connected with the fixed die, and the plastic piece stabilizing mechanisms are used for plugging overflow raw materials inside and outside the cavity in cooperation with the female die. Filling the overflow port on the female die by means of the limiting plate in the injection molding stage, forming a closed cavity between the male die and the female die, effectively preventing molten raw materials from overflowing, ensuring the molding integrity of the plastic part, and preventing the plastic box from being separated from the male die in advance by downward movement of the limiting plate in the demolding stage, so that stable positioning is provided for grabbing by the subsequent sucking disc.

Inventors

  • WANG QINGDONG

Assignees

  • 苏州奥比特精密注塑有限公司

Dates

Publication Date
20260512
Application Date
20251009

Claims (9)

  1. 1. The multi-component recycled plastic direct mixing injection molding device based on the single-screw extruder is characterized by comprising a supporting frame (100), an extruder body (101), a feed hopper (102), a fixed die (110) and a movable die (111), wherein a male die (112) is arranged on the inner side of the fixed die (110), a female die (113) corresponding to the male die (112) is arranged on the inner side of the movable die (111), and a cavity capable of accommodating a plastic box (114) is formed between the male die (112) and the female die (113); In the injection molding stage, plastic part stabilizing mechanisms (120) are arranged at the top and the bottom of the fixed die (110), the plastic part stabilizing mechanisms (120) are movably connected with the fixed die (110), the plastic part stabilizing mechanisms (120) are cooperated with a female die (113) to block overflow raw materials inside and outside a cavity, in the die withdrawal stage, the female die (113) releases the constraint of the plastic part stabilizing mechanisms (120), and the plastic part stabilizing mechanisms (120) longitudinally displace into the cavity and penetrate into the cavity, so that the plastic part stabilizing mechanisms (120) and the plastic box (114) form dislocation, and the plastic box (114) after demolding is intercepted; The plastic part stabilizing mechanism (120) comprises a limiting plate (121) which is attached to the fixed die (110), the limiting plate (121) corresponds to the male die (112) and is located at the top of the male die, an overflow port (115) is formed in a female die (113) corresponding to the limiting plate (121), and when injection molding is carried out, the limiting plate (121) is attached to the overflow port (115) and the inner side of the fixed die (110), so that a closed cavity is formed between the male die (112) and the female die (113).
  2. 2. The single-screw extruder-based multi-component recycled plastic direct mixing injection molding device according to claim 1, wherein a cavity (116) is formed in the male die (112), the cavity (116) is communicated with an air inlet channel (117) and an air outlet channel (118) which are arranged in the fixed die (110), the air inlet channel (117) is communicated with an external blower (130), the blower (130) blows cool air into the cavity (116) when cooling, and one end of the air outlet channel (118) far away from the cavity (116) is communicated with the external environment.
  3. 3. The multi-component recycling plastic direct mixing injection molding device based on the single screw extruder as set forth in claim 2, wherein an exhaust box (131) is fixedly arranged on a fixed die (110) at the communication position of the exhaust channel (118) and the external environment, the exhaust box (131) is internally hollowed out, the exhaust box (131) is provided with an exhaust outlet (132) horizontally facing the inner side of the fixed die (110), and the exhaust outlet (132) is used for conveying exhaust air flow in the exhaust channel (118) to the inner side of the fixed die (110).
  4. 4. The multi-component recycling plastic direct mixing injection molding device based on the single screw extruder according to claim 3, wherein the plastic part stabilizing mechanism (120) further comprises a bleed air box (122) fixedly connected with the limiting plate (121) and positioned on the fixed die (110), a stabilizer bar (126) penetrating into the fixed die (110) is fixed on the inner wall of the bleed air box (122), and the stabilizer bar (126) is used for keeping the bleed air box (122) to reciprocate longitudinally.
  5. 5. The single-screw extruder-based multicomponent reclaimed plastic direct mixing injection molding device according to claim 4, wherein an extension spring (125) is elastically and fixedly connected between the air entraining box (122) and the fixed mold (110), and the extension spring (125) is sleeved outside the stabilizer bar (126).
  6. 6. The direct mixing and injection molding device for multi-component recycled plastics based on a single screw extruder according to claim 5, wherein a hydraulic rod (140) is fixedly arranged on a fixed die (110), the telescopic end of the hydraulic rod (140) penetrates into an exhaust box (131), and a guide plate (141) is fixed at the end part.
  7. 7. The direct mixing and injection molding device for multi-component recycled plastics based on a single screw extruder as claimed in claim 6, wherein the guide plate (141) is provided with an inclined surface, and one side of the air entraining box (122) close to the inclined surface is opened.
  8. 8. The single-screw extruder-based multi-component recycled plastic direct mixing injection molding device according to claim 7, wherein an inclined inner plate (123) is fixedly connected to the inner side of the air entraining box (122), an air conveying channel (124) through which air flows is formed between the inner plate (123) and the air entraining box (122), the air conveying channel (124) is provided with an air inlet end and an air outlet end, and the air outlet end points to the box body of the plastic box (114).
  9. 9. The single screw extruder-based multicomponent recycled plastic direct mixing injection molding apparatus of claim 8, wherein said air inlet is horizontally lower than said air outlet (132) to smoothly direct air flow into said air delivery passage (124).

Description

Multicomponent reclaimed plastic direct mixing injection molding device based on single screw extruder Technical Field The invention relates to the technical field of injection molding residue recovery, in particular to a multi-component recovery plastic direct mixing injection molding device based on a single-screw extruder. Background The injection moulding machine is also called injection moulding machine or injection machine, and is a main moulding equipment for making thermoplastic plastics or thermosetting plastics into plastics products with various shapes by using plastics moulding mould, and can be divided into vertical, horizontal and full-electric type, and can be used for heating plastics, applying high pressure to molten plastics, making them be injected and full-charged into mould cavity, and its working principle is similar to that of injection machine, and it utilizes the thrust of screw (or plunger) to inject the plastics in the plasticized molten state (i.e. viscous state) into closed mould cavity, and can obtain the invented product after solidification and shaping. In the prior art, the depth of the box body of a plastic box is usually shallow and short (such as a large jelly box), compared with a plastic box with a larger box body depth, when demoulding is carried out, the contact area between the plastic box with the shallow and short box body and a mould is reduced, the friction resistance is reduced, the plastic box is easier to automatically fall off from the mould, the cross section of the box body of the plastic box is mostly conical, and when the inclination of the box body is increased, the friction force component between the plastic box and the mould is reduced sharply, so that the plastic box is easy to break off. Disclosure of Invention The invention provides a multicomponent reclaimed plastic direct mixing injection molding device based on a single screw extruder, which fills an overflow port on a female die by means of a limiting plate in an injection molding stage, so that a closed cavity is formed between a male die and the female die, the overflow of molten raw materials is effectively prevented, the molding integrity of a plastic part is ensured, and in a demolding stage, the limiting plate moves downwards to block the box edge part of a plastic box, thereby solving the problems in the background art, namely: In order to achieve the aim, the multi-component recycling plastic direct mixing injection molding device based on the single screw extruder comprises a support frame, an extruder body, a feed hopper, a fixed die and a movable die, wherein a male die is arranged on the inner side of the fixed die, a female die corresponding to the male die is arranged on the inner side of the movable die, and a cavity capable of accommodating a plastic box is formed between the male die and the female die; In the injection molding stage, plastic part stabilizing mechanisms are arranged at the top and the bottom of the fixed die and movably connected with the fixed die, the plastic part stabilizing mechanisms are cooperated with a female die to block internal and external overflow raw materials in a cavity, in the withdrawal stage, the female die releases the constraint of the plastic part stabilizing mechanisms, and the plastic part stabilizing mechanisms longitudinally displace into the cavity and penetrate into the cavity by virtue of the plastic part stabilizing mechanisms, so that dislocation is formed between the plastic part stabilizing mechanisms and the plastic box, and interception of the plastic box after demolding is realized. The plastic part stabilizing mechanism comprises a limiting plate which is arranged on the fixed die in a fitting way, the limiting plate corresponds to the male die and is positioned at the top of the male die, an overflow port is formed in the female die corresponding to the limiting plate, and when injection molding is carried out, the limiting plate is attached to the overflow port and the inner side of the fixed die, so that a closed cavity is formed between the male die and the female die in a surrounding way. In the technical scheme, when the female die and the male die are in the state shown in fig. 6, the raw materials are injected into the closed cavity, the closed cavity is filled with the raw materials, the overflow port is blocked by the limiting plate, the raw materials in the closed cavity are limited to overflow, and the raw materials are prevented from being wasted; further, the plastic part stabilizing mechanism further comprises an air entraining box fixedly connected with the limiting plate and located on the fixed die, a stabilizer bar penetrating into the fixed die is fixed on the inner wall of the air entraining box, and the stabilizer bar is used for keeping the air entraining box to longitudinally reciprocate. According to the technical scheme, in the process that the female die approaches the male die, the female die pres