injection moldstructure

Injection molds are generally composed of mold blanks, mold cores, auxiliary parts, intelligent auxiliary systems, auxiliary settings, and blind spot handling mechanisms according to their structure. Guangzhou Aix Rubber Products has 20 years of experience in custom processing of plastic molds. Let's take a look at the structure of injection molds as follows:

1. Formwork

Generally, there is no need for everyone to design the plan, and it can be purchased directly from the standard mold base manufacturer, which greatly saves the time required to design the mold, so it is called the plastic mold standard mold base. It forms part of the most basic architecture of plastic moulds.

2. Mold core

The mold core part is a key part of the plastic mold, which is the most important part of the mold. The forming part of the plastic product is inside the mold core, and most of the processing is also spent on the mold core. However, relatively there are some very simple molds, which do not have a core part, and the product is directly molded from the template. Most of the early plastic molds were like this, which was relatively backward.

3. Assisting parts

Common auxiliary parts for plastic molds include cylindrical pins, sprue bushings, mold thimbles, grab pins, support frames, shot plate mold guide posts, waste nails, etc. Some of them are standard parts, which can be purchased when purchasing mold blanks. Purchased together, some of them must be designed independently.

4. Intelligent assistance system

There are four intelligent auxiliary systems for plastic molds: gating system, injection system software, refrigeration system and discharge system. Sometimes, some molds still have a heating device because the plastic material used needs to be heated to a very high ambient temperature.

5. Auxiliary settings

The auxiliary parts of the plastic mold are provided with hook holes, KO holes (top stick holes), etc.

6. Dead angle solution structure

When the injection molding product has a dead angle, the mold will also have one or more structures to solve the dead angle. Such as rollers, inclined guide columns, hydraulic cylinders, etc.

The difference between injection molds is whether the mold is large or small, different auxiliary parts, auxiliary settings, auxiliary system software locations or methods are different. The way to solve the dead angle, structure, size, etc. have changed. Of course, development experience is very important in order to make the manufactured molds easy to process, easy to install, long in service life, affordable, and good in molded products.and weGuangzhou Auto Engineering Plasticsis focused on plasticMold custom processing, can deal with problems in design and processing,Quality is guaranteed¡£

Manufacturing process and technological process of injection mold customization

1. Mold interior designer conducts product mastery and evaluation. In the early stage of injection mold design plan, mold interior designer must have a comprehensive understanding of product structure, size, main parameters and other data, and evaluate whether the existing mold structure can complete mass production. If there is no problem, you can go to the next step; Guangzhou Aix has 20 rich experience in custom processing of injection molding plastic molds, and the professionalism is guaranteed.

2. Based on the evaluation results, the interior designer of the injection mold will design 3D assembly drawings, single-piece drawings, parting drawings, assembly drawings, EDM drawings, electronic circuit diagrams, etc.;

3. The mold masters communicate and confirm according to the engineering drawings designed by the injection mold design company. If there is no problem, they can start ordering the raw materials of the injection mold. If there is any objection, they will start to modify and optimize the engineering drawings;

4. After the raw materials of the injection mold are delivered, the mold technical engineer should check whether the material is up to standard and whether it meets the needs of manufacturing and processing, and then submit it to the mold fitter for milling processing;

5. The injection mold technical engineer carried out strength test and analysis on the product workpiece after the heat treatment process, and it was clear that there were no deviations, scars and many other problems;

6. Conduct electrical processing after the heat treatment process, and do a good job of data information filing;

7. For wire cutting processing, pay attention to the specifications of each spare part after processing, such as whether there is an assembly gap between the insert hole and the thimble eye;

8. For the finishing of injection molds, it is generally necessary to pre-embed the saving capacity, and at the same time record the specifications, which is convenient for inspection anytime and anywhere;

9. Carry out EDM processing according to the drawing scale;

10. The surface of the flow channel is polished to improve the smoothness of the surface;

11. Carry out safety inspection before assembly, and do a good job of cleaning and rust prevention;

12. Injection mold assembly;

13. There is no problem with the adjustment of the test piece, and a pair of molds is completed;

Frequently asked questions about injection mold design

1) Die-out target and parting line

At the beginning of the design of each injection molded part, its mold release target and parting line are first determined to ensure that the core-pulling roller mechanism is minimized and the appearance hazards of the parting line are eliminated.

2) Draft slope

3) Product thickness

4) Structural columns

5) arc

6) hole

The shape of the hole should be as simple as possible, generally a ring shape. The radial direction of the hole is consistent with the direction of the mold release, which can prevent core pulling. When the hole height and diameter exceed 2, the draft slope should be set. At this time, the hole diameter should be calculated according to the size of the path (larger solid line size).

7) Core pulling, roller structure and avoidance of injection mold

8) Integrated hinge

When plastic molds are customized and processed, when injection molding is used to process integrated hinges, the plastic inlet is only planned on one side of the hinge as a whole.

9) Inserts

Embedding inserts in injection molded parts can add part of the strength, strength, and dimensional accuracy to set small threaded holes (shafts) to meet various special requirements. Together will add product cost. The plastic around the insert should be properly thickened to avoid stress cracking of the plastic part.

10) Logo

The product logo is generally set on the flatter part of the inner surface of the product, and is raised in the form of a protrusion. Choose the opposite side and the mold-out direction ruler or set the logo on the same side to avoid damage.

11) Precision of injection molding products

Due to the non-uniformity and uncertainty of the reduction rate during injection molding, the precision of injection molding products is much lower than that of metal products, and it cannot be simply inserted into the dimensional tolerances of mechanical parts. Appropriate tolerances should be selected according to the standard.

12) Variations of injection molding products

Develop the rigidity of injection molded part construction and reduce deformation. Minimize the tablet structure as much as possible, and effectively determine the reverse side and uneven structure. Set scientific and reasonable structural columns.

13) Buckle structure

The buckle device is planned to be used together with several buckle structures, so that the overall equipment will not be unable to operate due to the damage of some buckle structures, and then add its service life, followed by more considerations and rounding arc, plus compressive strength.

14) Electric welding (hot plate welding, ultrasonic welding, vibration welding)

15) Effectively consider the contradiction between the selling points of craft products

When designing injection molded parts, it is necessary to fully consider the contradiction between product appearance and functional manufacturing process. Sometimes giving up part of the process performance can get effective appearance or function.

16) The diameter of the screw hole is related to the diameter of the self-tapping screw

17) BOSS planning rules:

It is best not to apply the support alone. It should be connected to the surface as much as possible or applied together with the structural column. The purpose is to promote the strength of the support and make the plastic particles flow more smoothly.

What is the daily maintenance of injection molds?

1) The daily maintenance of the injection mold cannot be ignored. Before the mold is lowered, it should be carefully removed to remove the dirt, and check whether the guide sleeve of the mold and the mold are well lubricated. This is also some maintenance that needs to be done daily. 2) It is necessary to carry out safety inspections on the mechanical roulette and mold assembly base frequently to ensure the coaxial precision of the left and right roulettes. 3) After the injection mold is installed, check whether the fastening screws of the mold assembly base are fastened correctly. 4) For the injection molds used in mass production, there will be a need for backup data to facilitate alternate production and ensure production needs. 5) Injection molds need to be handled with care during transportation, and should not be thrown or touched randomly, so as not to cause the core-pulling mechanism and guiding mechanism of the mold.