CN112659484A

CN112659484A - Novel tray forming die with chemical foaming agent injection molding

Info

Publication number: CN112659484A
Application number: CN202110058590.3A
Authority: CN
Inventors: 谭贺洵; 贺春扬; 申国辉
Original assignee: Foshan Xinhongteng Technology Development Co ltd
Current assignee: Foshan Xinhongteng Technology Development Co ltd
Priority date: 2021-01-16
Filing date: 2021-01-16
Publication date: 2021-04-16

Abstract

The invention relates to the technical field of injection molding, and discloses a novel tray molding die injected with a chemical foaming agent. When core part and die cavity part carry out hydraulic motion, mould plastics through using chemical foaming agent (CBA) with the model of 3D emulation software design for novel tray forming die, the inside valve runner injection molding system that is equipped with of mould, the drawing of patterns of tray footing when popping out the slider motion, the drawing of patterns of tray side when hydraulic pressure slider motion, the raiser promotes and makes the tray take out from the core after the process of moulding plastics finishes, current novel tray injection moulding die weight is big, problem with high costs has been solved to this structure.

Description

Novel tray forming die with chemical foaming agent injection molding

Technical Field

The invention relates to the technical field of injection molding, in particular to a novel tray molding die injected with a chemical foaming agent.

Background

Injection molding, also known as injection molding, is a method of molding by injection and molding. The injection molding method has the advantages of high production speed, high efficiency, automation of operation, various colors, various shapes from simple to complex, small sizes, accurate product size, easy replacement of products, capability of forming products with complex shapes, and suitability for the molding processing fields of mass production, products with complex shapes and the like. It is one of the most important processes in the manufacture of polymer parts, which accounts for over 1/3 of all processes for machining plastic parts, and the appearance and properties of injection molded parts are also largely dependent on raw materials, mold design and process variables.

A variation of conventional injection molding using Chemical Blowing Agent (CBA) injection molding introduces a porous component into the part being manufactured, producing a part having a strong exterior profile while having a porous core. The main advantage is to reduce the density, i.e. to reduce the weight, and to eliminate sink marks caused by shrinkage. The CBA injection molding has great significance for reducing the cost of injection molding raw materials and improving the mechanical strength of products, the mechanical strength of the plastic products injected by using the foaming technology can be improved to 2-4 times of that of a non-foaming state, and the method is cheap and efficient. The gas generated in the chemical foaming process is mainly nitrogen, and then is carbon dioxide, moisture and a small amount of other gases, so that the plastic injection molding process is almost nontoxic and tasteless, does not cause secondary pollution to products and air, and is an environment-friendly injection molding process. The CBA can use conventional molding and injection equipment and can effectively reduce component defects, thereby saving costs and reducing waste.

The tray has big size, often is used for transporting raw and other materials, often requires structural strength big to weight is little, but the requirement of novel tray can't be reached to ordinary injection moulding mode. To solve this problem we propose a new tray forming mould injection moulded with a chemical blowing agent.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a novel tray forming die injected by a chemical foaming agent, which has the advantages of high product structural strength, light weight and high cost performance, and solves the problems that the existing injection molding mode is high in cost and the product cannot meet the requirements.

(II) technical scheme

In order to realize the purposes of large structural strength, light weight and high cost performance of the product, the invention provides the following technical scheme: the utility model provides a novel tray forming die who moulds plastics with chemical foaming agent, includes core part and die cavity part, the core part of mould is provided with four raisers, and four core hydraulic pressure round pins are installed to four corners department, and die cavity part mid-mounting has the pop-up slider, and the side-mounting has hydraulic pressure slider. When core part and die cavity part carry out hydraulic motion, mould plastics through using chemical foaming agent (CBA) with the model of 3D emulation software design for novel tray forming die, pop out the drawing of patterns of tray footing when the slider motion, the drawing of patterns of tray side when the hydraulic pressure slider motion, the raiser promotes and makes the tray take out from the core after the process of moulding plastics finishes.

Preferably, the shapes of the core part and the cavity part are matched with each other, and no visible part is arranged in the assembly, so that the two parts can be smoothly attached, and the injection molding can be smoothly carried out.

Preferably, the cavity part is provided with four through holes corresponding to the core hydraulic pins on the core part, so that the cavity part can be locked by the hydraulic pins smoothly, and all parts are stressed uniformly and kept stable.

Preferably, the core portion of the core portion and the cavity portion of the cavity portion correspond in size to ensure that no material leakage occurs during injection molding.

Preferably, the lifter is internal to the core portion to ensure that the part is removed from the core after the injection moulding process is complete.

Preferably, the ejecting slide block corresponds to the bottom of the mold, so that smooth demolding of the novel tray bottom foot is guaranteed.

Preferably, the hydraulic sliding block corresponds to four side surfaces of the inner core part of the core part, so that smooth demolding of the novel tray side surface is guaranteed.

(III) advantageous effects

Compared with the prior art, the invention provides a novel tray forming die injected with a chemical foaming agent, which has the following beneficial effects:

1. the novel tray forming die injected with the chemical foaming agent is formed by injecting a model designed by 3D simulation software by using the chemical foaming agent (CBA) when a core part and a cavity part perform hydraulic movement. The porous member is introduced in the manufactured part, which has a strong outer contour while having a porous core. The main advantage is to reduce the density, i.e. to reduce the weight, and to eliminate sink marks caused by shrinkage. The CBA can use conventional molding and injection equipment and can effectively reduce component defects, thereby saving costs and reducing waste.

2. This novel tray forming die that chemical foaming agent was moulded plastics has prepared the forming die that can obtain the novel tray that structural strength is big, weight is little through chemical foaming agent (CBA), has solved the problem that current injection moulding mode is with high costs, the product can not reach the requirement.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of an injection molded product of the present invention;

in the figure: 1 core part, 2 cavity parts, 3 lifters, 4 hydraulic pins, 5 hydraulic sliders and 6 ejection sliders.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the novel tray forming mold injected with chemical foaming agent comprises a core part 1 and a cavity part 2, wherein the core part of the mold is provided with four lifters 3, four core hydraulic pins 4 are installed at four corners, a pop-up slider 6 is installed at the cavity part, and a hydraulic slider 5 is installed at the side surface.

Referring to fig. 1 and 2, the new tray forming mold injected with chemical foaming agent selects a83 CuBe alloy raw material, and determines the position of a parting line, thereby defining the region where a core and a cavity are partially formed, the core being located on the moving side (extraction side) of the injection machine, and the cavity being located on the fixed side (injection side). When the core part 1 and the cavity part 2 are hydraulically moved, a model designed by 3D simulation software is injected into a novel tray forming mold by using a chemical foaming agent (CBA), and the mold is provided with a valve gate injection system. The porous member is introduced in the manufactured part, which has a strong outer contour while having a porous core. The mold reduces density, i.e., weight, and eliminates sink marks caused by shrinkage. The CBA can use conventional molding and injection equipment, can effectively reduce the defects of components, thereby saving cost and reducing waste, has the advantages of high structural strength, light weight and high cost performance of products, and solves the problems that the existing injection molding mode is high in cost and the products cannot meet the requirements.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel tray forming die who moulds plastics with chemical foaming agent, includes core part (1) and cavity part (2), its characterized in that: the core part (1) of mould is provided with four raisers (3), and four core hydraulic pressure round pins (4) are installed to four corners department, and the die cavity part is installed and is popped out slider (6), and hydraulic pressure slider (5) are installed to the side. When core part (1) and die cavity part (2) carry out hydraulic motion, mould plastics into novel tray forming die through using chemical foaming agent (CBA) with the model of 3D emulation software design, the built-in valve runner injection system that has of mould pops out tray footing drawing of patterns when slider (6) moves, and the drawing of patterns of tray side when hydraulic pressure slider (5) moves, and lifting mechanism (3) promote to make the tray take out from the core after the process of moulding plastics.

2. The new tray forming mold for injection molding with chemical foaming agent as claimed in claim 1, wherein: the core part (1) and the cavity part (2) are mutually matched in shape, and no visible part is arranged in the assembly.

3. The new tray forming mold injected with chemical foaming agent as claimed in claim 1, wherein: the cavity part (2) is provided with through holes corresponding to the core hydraulic pins (4) on the core part (1), and the number of the through holes is four.

4. The new tray forming mold injected with chemical foaming agent as claimed in claim 1, wherein: the core part (1) has a core size corresponding to the cavity part size of the cavity part (2).

5. The new tray forming mold injected with chemical foaming agent as claimed in claim 1, wherein: the lifter (3) is inside the core part (1).

6. The new tray forming mold injected with chemical foaming agent as claimed in claim 1, wherein: the ejection slide block (6) corresponds to the bottom of the mould.

7. The new tray forming mold injected with chemical foaming agent as claimed in claim 1, wherein: the hydraulic slide block (5) corresponds to four side surfaces of the inner core part of the core part (1).