Waste Paper Plastic Basket Injection Molding

About waste paper plastic basket injection molding

Regarding the general waste paper plastic basket injection molds, under the best tooling condition, the key technical points to guarantee the final superior crate production are mold steel, injection system, cooling system, ejector system.

1. Mold steel – choose the most suitable steel for mold main parts and base with the correct to harden treatment, ensure the mold life could meet the production requirement. Otherwise, no matter how cheap it is, you could find it in the market. But no one could ensure the quality, maybe just some steels which could work for a while.

2. Injection system – for better plastic crate molding, such as, crate molders may use recycled plastic to produce some crates when it is allowed, under this production condition, the mold injection system should be designed well to avoid the damage of small iron pieces and pebbles and prevent them from entering mold cavities.

3. Cooling system – key design for shortest cycle time which mainly determines the final production efficiency. Such as independent cooling water channel, cooling channel diameter, the distance between the cooling channel and mold molding surface, and so on.

4. Ejector system – it would help improve the production efficiency too, such as the mechanical ejector system: it could do ejection action while mold opening.

What we will do for a durable waste paper plastic basket injection mold?

1. Mould construction design

* 1, 2, 4 cavities optional

* best cooling circuit

* 4 sliders driven by the hydraulic cylinder or pulling hooks

* put maximum wear plates with hardness HRC45 on where is worn easily

* interchangeable for sizes, weight, models…

* BeCu for better cooling

* simply maintenance

2. Mold Maintenance manual

* Simulated production in our factory before shipment

How to get a mold quotation from SWY MOULD?

Although there are countless creative people with great creativity in this world, sometimes they just do not have the necessary knowledge to turn creative ideas into reality.

If a project involves parts made of plastic material, it might be appropriate to adopt the plastic injection molding process. Injection molding, the technique of choice for a large number of entrepreneurs and OEMs, is well known for its capability to turn out high volumes to the exact specs.

To determine project feasibility, the first step would be to get an injection mold quotation for the injection molding; but, before a precise quotation can be offered, a lot of questions should be answered in the first place.

The top 4 questions that you are supposed to provide answers for injection mold quotation to:

1. Do the part to be quoted for come with CAD drawings and/or samples?

In the beginning, to create an accurate injection mold quotation, the mold maker needs to have a clear idea about what you require them to do. Such info as dimensions and geometric complexity of a part can be included in a detailed CAD drawing, while a sample or prototype is able to facilitate the mold maker in determining how to maximize manufacturability through part design.

2. What is the functional purpose of the part? 

Is the part going to be exposed to any chemical environment or other unfavorable conditions? So, the plastic injection mold maker you are going to partner with has to clearly understand the specific application of the part to be molded. Your detailed explanation is able to help the mold maker determine the specific requirements for the part – strength, wear & tear, etc. Through the info you provide, the manufacturer will be able to make recommendations on the resins and/or additives for your specific project.

3. What is the required quantity?

Not all plastic injection molds are made alike. If your project only requires a smaller quantity or a shorter production cycle, the most appropriate option for you should be an aluminum mold or prototype mold.  On the contrary, if you are interested in a larger quantity over a longer production run, a hardened steel mold would be a better fit for you.  Though the initial cost of the second option appears to be much higher, it pays for itself during the service life of the tool. Also for making different quantities needed mold, the mold steel is different.

4. What type of materials – polymers or resins – does your part require?

In the initial stage, you might need to find out some facts, but you are able to offer your mold maker a starting reference point if you have a general idea about what type of plastic materials you think fits your project the most. Eventually, a qualified mold maker will recommend to you the resins and/or additives they believe will achieve the best outcome.

When your project involves the production of plastic parts, you have to do some fact-finding before you get a proper injection mold quotation. By answering the above 4 questions, you will be able to establish a mutually beneficial relationship with your supplier, which can ensure that your project goes along as smoothly as expected.

Tips for waster paper plastic basket mold disassembly

When there is any problem caused and need to change the spare parts in the mold, you need to disassembly the mold. Before you disassemble the mold, here are some tips you need to read before:

1. Able to read mold assembly drawings, and understand how each part and component functions and works, as well as how they are installed and mated.

2. Check parts, standard parts, and special assembly tools against the checklist shown on the drawings.

3. Select appropriate general-purpose assembly tools (such as screwdrivers, Allen wrenches, copper rods, punches, tweezers, clean cotton yarns, gloves, vises, and bench vises, etc.) according to standard parts.

4. Analyze and determine the type of mold to be disassembled.

5. Analyze how the mold to be disassembled works, e.g. type of gating system, parting surface & parting method, and ejection method, etc.

6. Analyze the description and purpose of each mold part and component, as well as the interrelationship between them.

7. Determine disassembly sequence: before mold disassembly, make clear which parts are removable and which are not, to work out a disassembly plan. Usually, the core and cavity need to be separated first – respectively loosen the locking screws of the cavity and the core, take out the pins, use disassembly tools to remove each main component, and then remove the main gating system from the cavity, remove the ejection system from the core & disassemble it, press parts like mold core out from the retaining plate, and disassemble the side core-pulling mechanism if there is one.  As for each plastic injection mold, different disassembly approaches and sequences should be established based on analysis of its specific structural characteristics.

8. Place (or number) the disassembled parts according to the disassembly sequence, to make it easy for installation.

9. Special notes for mold disassembly:

* Use disassembly tools correctly.

* When disassembling mating parts, adopt different methods (such as knocking and pressing) to treat different mating relationships.

* Try to maintain force balance and do not knock blindly and forcibly. It is not allowed to knock mold parts directly with a hammer.

* Don’t disassemble the parts that are not removable or not appropriate to remove.