Plastic spoon injection moulding

In addition, our company has established cooperative relationships with plastic raw material suppliers, printing manufacturers, etc. to ensure the supply of raw materials and printing quality. Through our rich experience and perfect supply chain, our company can provide customers with high-quality customized plastic spoon injection moulding products to meet their specific needs. At the same time, we have 10 years of professional foreign trade service experience, understand the foreign trade process, and better serve our customers. For plastic spoon injection moulding products, we can make corresponding plastic parts, which is mainly done through injection molds.

The injection molding process for plastic spoons is a typical one that strives for extreme efficiency and low cost. Although its structure is simple, its high production volume places extremely high demands on production speed, energy consumption, and raw material costs.

The following is a detailed process for plastic spoon injection molding, highlighting its large-scale, fully automated production.

Plastic Spoon Injection Molding Process

Phase 1: Raw Material Preparation

Material Selection:

Polypropylene (PP): The most commonly used material. It is non-toxic and odorless, meets FDA food contact standards, has good toughness, and is inexpensive.

Polystyrene (PS): It has a harder, more brittle texture and high transparency, and is often used to make transparent spoons for yogurt cups.

Additives: Typically, only masterbatch is required to produce the desired color (white, black, red, etc.). The use of recycled materials is strictly prohibited; only food-grade virgin materials must be used.

Drying Treatment:

PP and PS do not absorb much water, but in large-scale production, a brief drying step (e.g., 1-2 hours at 80°C) is often performed to ensure optimal performance and prevent trace moisture from causing surface air marks.

Phase Two: Mold Design and Features

Spoon molds are a prime example of high-efficiency, high-cavity molds.

High-Cavity Molds:

A mold typically has 32, 64, 128, or even more cavities. This is key to reducing the cost per part.

The cavity layout requires rheological analysis to ensure that each cavity is filled simultaneously and evenly with plastic.

Hot Runner System: This is an absolute standard feature.

A needle-valve hot nozzle precisely controls the opening and closing of each feed point.

Advantages: No waste (no handle), saving material; shortened molding cycles; and fully automated production.

Cooling System:

The design must be extremely efficient. The spoon's thin body allows for rapid cooling and extremely short cycle times. Uniform cooling water flow is key to ensuring consistent dimensions and deformation across all spoons.

Exhaust System:

Micro-exhaust slots are located at the end of the cavity to prevent trapped air and burns (yellow lines or black spots appearing on parts of the spoon).

Ejector System:

Due to the spoon's unique shape, round or flat ejector pins are typically placed on non-critical surfaces or the bottom of the handle to achieve automatic ejection and removal.

Stage 3: Injection Molding Process

This is the core step in achieving high-speed production, with cycle times measured in seconds.

Fully Automatic Loading: Dried plastic pellets are automatically drawn into the injection molding machine's hopper via a central feeding system.

Injection Molding Stage:

High-Speed Injection: The screw injects molten plastic into the mold at extremely high speeds. This ensures that all cavities are filled as quickly as possible, preventing material cooling at the front end and resulting in material shortages.

Low Holding Pressure: Because the spoons are very thin and shrinkage is limited, only very low holding pressure and time are required, primarily to prevent flash (burrs).

Cooling and Mold Opening:

Extremely Short Cooling: The spoons cool very quickly, typically only a few seconds.

Automated Mold Opening: After the mold is opened, a robot automatically enters and its gripper removes all spoons at once.

Mold Removal and Collection:

The robot moves the spoons to the side of the machine, where, through a specific vibration or air blowing method, they automatically drop into a collection bin or are directly conveyed to the packaging line. This entire process requires no human interaction.

Stage 4: Post-Processing & Quality Control

Post-Processing:

De-gating: Spoons produced with hot runner molds do not have sprue material, so this step is unnecessary.

Screening: A vibrating screen or air separation system is used to remove defective products that may be stuck together.

Quality Inspection:

Appearance Inspection: Workers regularly conduct spot checks to check for defects such as missing material, flash, discoloration, and contamination.

Dimensional Inspection: Use calipers to spot-check the consistency of key spoon dimensions.

Functional Inspection: Perform drop tests (to test toughness) and load tests (to test strength).

Packaging:

Use a fully automatic counting and packaging machine to pack spoons into plastic bags or cartons according to a specific quantity (e.g., 50 per bag) for packaging and storage.

Core Flowchart

Food-grade virgin material + masterbatch → Brief drying → Automatic loading → Melt plasticization → High-speed injection → Short-term pressure holding → Rapid cooling → Mold opening → Robotic removal → Automatic drop collection → Vibration screening → Automatic counting and packaging → Boxing and storage

We are a plastic spoon injection moulding manufacturer, providing high-quality plastic spoon injection moulding manufacturing. As long as you want to customize/develop plastic spoon injection moulding products, you can find us. We have professional injection mold design and mature manufacturing technology, providing you with one-stop service, from product design-mold making-product production-product packaging-product transportation, we can help you in every link. As long as you come to us, we will provide you with the ultimate service and satisfy you in terms of product quality, production time, information dialogue, etc.

Plastic Injection Mould making

Plastic molding specifications

Mold design:

Transaction process:

Mold testing:

Product packaging

Factory

We are Custom Plastic Mold factory. Our factory is plastic injection mold maker. we has 17 years of experience in professional custom plastic mold and 10 years of foreign trade experience. We are custom Plastic Mold supplier. We can provide custom Plastic Mold service. Our factory can make the Injection molded plastic parts, and the quality of the products will satisfy you.

We have more than 50 high-end machines and hundreds of engineers and designers. We can provide one-stop service, from product design - mold making - product production - product packaging - transportation. We have a complete production chain. We can meet all your requirements.

Services we provide:

Professional custom mold service, Plastic mold design and manufacturing .plastic product production, product design, mold design, blow mold customization, rotational mold customization, die-casting mold customization. 3D printing services, CNC manufacturing services, product packaging, customized packaging, shipping services.

We always adhere to the principles of quality first and time first. While providing customers with the highest quality products, try to maximize the production efficiency and shorten production time. We are proud to tell every customer that our company has not lost any customer since its establishment.If there is a problem with the product, we will seek a solution actively and take responsibility to the end.

FAQ

Q1: Are you trading company or manufacturer ?

A: We are manufacturers.

Q2. When can I get the quotation?

A: We usually quote within 2 days after we get your inquiry.

If you are very urgent, please call us or tell us in your email so that we can quote for you first.

Q3. How long is the lead-time for mold?

A: It all depends on the products' size and complexity. Normally, the lead time is 25 days.

Q4. I have no 3D drawing, how should I start the new project?

A: You can supply us a molding sample, we will help you finish the 3D drawing design.

Q5. Before shipment, how to make sure the products quality?

A: If you don't come to our factory and also don't have the third party for inspection, we will be as your inspection worker.

We will supply you a video for production process detail include process report, products size structure and surface detail, packing detail and so on.

Q6. What is your payment terms?

A: Mold Payment: 40% deposit by T/T in advance, 30% second mold payment before sending out the first trial samples, 30% mold balance after you agree the final samples.

B:Production Payment: 50% deposit in advance, 50% before sending out the final goods.

Q7: How do you make our business long-term and good relationship?

A:1. We keep good quality and competitive price to ensure our customers benefit for best quality products.

2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.