How to design a complete set of plastic molds

The guy upstairs was interesting.

The problem is rudimentary.

The answer is professional.

The process is cumbersome.

The bounty is pitiful.

Machine: Injection molding machine.

Manufacturing method: The transparent box is polypropylene pp material in plastic, which is produced by injection molding;

The opaque foamed plastic box is polystyrene PS, which is produced by the foaming method.

Disposable Fast Food Boxes:

Disposable fast food boxes have been transformed from foam lunch boxes to environmentally friendly lunch boxes, the original foam lunch boxes are eliminated due to their lack of high temperature resistance and damage to the environment caused by the production process, and are replaced by plastic lunch boxes, paper lunch boxes, wooden lunch boxes, degradable lunch boxes and so on. Among them, plastics have become the mainstream materials for the manufacture of disposable fast food boxes due to their low toxicity, high melting point, strong plasticity, simple production and low relative cost.

Material: There are two main types of disposable lunch boxes made of plastic, PP polypropylene and PS polystyrene, both of which are non-toxic, tasteless and odorless

PP is soft, and the general use temperature of PP is -6 degrees to 120 degrees, so it is especially suitable for serving hot meals and hot dishes.

PS is hard, and transparent, but easy to tremble and tear, PS begins to soften when the use temperature reaches 75 degrees, so it is not suitable for hot meals and hot dishes, but PS has good low temperature performance and is the best packaging material for ice cream.

Hello, dear, I'm sorry to answer for you!! The manufacture of precision plastic molds generally includes the following steps: 1. Design molds:

According to the product drawings and requirements provided by customers, design the mold structure and size that meet the requirements. 2. Make the mold core: according to the design drawings, use CNC machine tools or EDM and other processes to process the shape and size of the mold core.

3. Make the mold shell: according to the design drawings, use CNC machine tools or milling machines and other processes to process the shape and size of the mold shell. 4 Assembling the Mold:

The mold core and mold shell are assembled, and debugged and tested to ensure the accuracy and stability of the mold. 5. Mold trial production: use the mold to test this quiet production to check whether the quality and size of the product meet the requirements.

6. Mold adjustment: According to the trial production results, the mold is adjusted and optimized to achieve better production results. 7 Mold Maintenance:

Regularly maintain and maintain the mold to prolong the service life of the mold. Dear, the above is mine, I hope these contents can help you Thank you for your understanding and support, I will continue to work hard

Hello, dear and happy to answer for you! Manufacturing precision plastic molds usually requires the following steps:1

Design: According to customer requirements, formulate design schemes, including mold structure, size, material, machining accuracy, etc., as well as 3D drawings or 2D drawings. 2.

Processing: According to the design drawings, CNC machine tools, milling machines, grinding machines, wire cutting machines and other tools are used for processing to manufacture various parts of the mold. 3.

Assembly: All parts are assembled into a complete mold, and rigorously debugged and tested to ensure that their accuracy and quality meet the requirements. 4.

Inspection: Conduct comprehensive inspection and testing of the manufactured molds, including size, weight, processing accuracy, service life, etc., to ensure that they meet customer requirements. 5.

Delivery: Pack the manufactured mold and deliver it to the customer, and provide instructions and suggestions for the use and maintenance of the mold. Manufacturing precision plastic molds requires a high degree of professional knowledge and skills, precision processing equipment and high-precision testing tools, as well as in-depth understanding and understanding of the characteristics of different plastic materials and mold structures, so as to manufacture reliable and high-quality molds.

Find an iron container, put the plastic you want to melt in, heat it, wait for the plastic to melt, and pour it into the mold.

According to the different types of gating systems, plastic molds can be divided into three categories:

1) Large nozzle mold: The runner and gate are on the parting line, and the product is demoulded together when the mold is opened, the design is the simplest, easy to process, and the cost is low, so more people use the large nozzle system to operate. The plastic mold structure is divided into two parts:

Moving and fixed molding. The moving part with the injection machine is the moving mold (mostly the ejection side), and the injection end of the injection machine is generally inactive, which is called fixed mold. Because the fixed part of the large nozzle mold is generally composed of two steel plates, it is also called this kind of structural mold"Which state refers to the two-plate mold"。

The two-plate mold is the simplest structure of the large nozzle mold.

2) Nozzle mold: The runner and gate are not on the parting line, generally directly on the product, so it is necessary to design an additional group of nozzle parting line, the design is more complex, and the processing is more difficult. The fixed part of the nozzle mold is generally composed of three steel plates, so it is also called this kind of structural mold"Three-plate mold"。

The three-plate mold is the simplest structure of the nozzle mold.

3) Hot runner mold: This kind of mold structure is roughly the same as the nozzle, the biggest difference is that the runner is in one or more hot runner plates and hot pumps with constant temperature, no cold material demoulding, the runner and the gate are directly on the product, so the runner does not need to be demoulded, this system is also known as the nozzle system, which can save raw materials, and is suitable for the situation that the raw materials are more expensive, the product requirements are higher, the design and processing are difficult, and the mold cost is high.

You can't learn the ability of the mold industry in books, and you need to practice in the factory. You can communicate if you need to.

While buying books and learning theories, I went into the factory to learn from the master.

Hehe, you can start from two aspects:

First, starting from the macro level, the processing and manufacturing of plastic molds to molding production are regarded as a whole, and the relationship between injection molding machines and molding materials and molds is clarified, as well as the impact on the final molded products.

Second, starting from the microscopic, this is divided into many aspects:

1.The components of the mold structure: runner system, cooling system, ejection system, parting line, mold action.

2.Knowledge of plastic materials: molding characteristics and usage of commonly used rubber compounds 3There are three major elements of injection molding: pressure, speed, and temperature.

4.Machining method of mold making and measuring method of mold and product 5The influence of product structure on the mold, how to optimize the product to facilitate mold manufacturing.

When you really face the problem, you have to learn the method of elimination. Be brave enough to try. There can be no limits to how you can see things. This will grow faster.