2liter top carn cover plastic 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 2liter top carn cover plastic 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 2liter top carn cover plastic injection moulding products, we can make corresponding plastic parts, which is mainly done through injection molds.

The key aspects of injection molding a 2-liter top cap involve multiple steps, including material selection, mold design, and process parameter optimization. Product performance, production efficiency, and quality control must be comprehensively considered. The following are key points:

1. Material Selection

Common Plastics: PP (polypropylene) or HDPE (high-density polyethylene) are common choices due to their chemical resistance, lightweight design, and cost advantages.

Additives: UV inhibitors (for outdoor use), toughening agents (to improve impact resistance), or masterbatches (for color requirements) may be required.

Drying: Hygroscopic materials (such as PET) require pre-drying to prevent air bubbles and surface defects.

2. Mold Design

Parting Surface and Draft Angle: Ensure smooth demolding of the top cap to avoid strain. A draft angle of 1° to 3° is recommended.

Gating Design: Point gates or latent gates are preferred to minimize weld marks (e.g., center-filling of the top cap).

Cooling System: Uniformly distribute cooling channels to reduce cycle time (e.g., conformal cooling channel design).

Vent grooves: Prevent trapped air from burning or underfilling. Vent groove depth should be 0.02-0.04mm.

3. Injection Molding Process Parameters

Temperature Control:

Barrel temperature: PP typically 190-230°C, HDPE 180-220°C (adjusted based on melt index).

Mold temperature: 40-80°C (affects surface gloss and shrinkage).

Injection Pressure and Speed:

High-speed injection fills thin-walled areas to avoid cold slugs; holding pressure should be optimized to minimize sink marks.

Holding and Cooling Time:

Holding time is set based on the gate freeze time (typically 5-10 seconds).

Cooling time should account for at least 50% of the cycle time to ensure the top cap is properly formed (can be optimized through mold flow analysis).

4. Common Defects and Solutions:

Sink marks/depression: Increase holding pressure, extend holding time, or optimize rib design (thickness ≤ 60% of the main wall thickness).

Weld Marks: Adjust gate position or increase melt temperature/injection speed.

Warp: Improve cooling uniformity, adjust ejection balance, or use a low-shrinkage material.

5. Post-Processing and Inspection

Deflashing: Trim burrs on the parting surface or ejector pins.

Dimensional Inspection: Focus on checking diameter, height, and sealing surface flatness (e.g., using a go/no-go gauge).

Sealing Test: If the cap is used to seal a container, perform an airtightness or hydraulic test.

6. Other Considerations

Before mass production: Verify the mold and process through a trial mold (T0-T1) and record key parameters.

Automated Production: Design a robotic pick-up or stacking system to improve efficiency.

2liter top carn cover plastic injection moulding

We are a 2liter top carn cover plastic injection moulding manufacturer, providing high-quality 2liter top carn cover plastic injection moulding manufacturing. As long as you want to customize/develop 2liter top carn cover plastic 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.