Bottle Cap Mold

 

The long service life of YOUNCE's bottle cap mold is a visible commitment to the long-term trust of its customers. It's built upon countless molds rigorously tested day and night on the production lines of renowned water/beverage companies. The durability of our molds stems not only from top-tier materials and craftsmanship, but also from a deep understanding of every critical moment in the bottle cap injection molding process-a sophisticated cooling system ensures thermal balance, and a rigid structural design withstands the continuous impact of the injection molding machine when mold closing. It guarantees virtually no degradation in critical sealing dimensions from the first mold run to the millionth mold run, and even more. Choosing us means gaining peace of mind in production and a market-proven, trustworthy long-term partner.

YOUNCE offers comprehensive cavity solutions for water/beverage bottle cap molds, such as 32, 48, or 64 cavity molds, to meet the size and type requirements of various caps. For applications with a large number of cavities, we prioritize hot runner molds to ensure efficient production; we also provide cold runner and semi-hot runner molds suitable for small-cavity production. We support flexible customization of mold solutions, with any number of cavities, to meet specific project requirements. Please feel free to contact us.

 

 

Shaping Modle	Plastic Injection Mold	Place of Origin	Zhejiang, China
Brand Name	Younce	Mold type	Bottle cap mould
Product Material	Steel	Mould structurer material	P20,S136,H13, etc
Mould runner	Hot/cooled runner system	Mould design software	UG, CAD/CAM etc
Mould surface treatment	Polishing finish	Mould hardness treatment	Nitrogen treatment
Mould processing	Wire cutting, high-speed engraved, CNC, polishing, etc.	Mould life	1 million shots at least
mould gate type	Point gate, latent gate, etc	mould cycle time	Based on cap neck size,weight,structure, etc

 

 

 

Item name	Water & Beverage Bottle Cap Mold
Runner	Hot/cooled runner
Structure	Self-locked/Automatic dropped etc
Cavity No.	8,12,16,24,32, 48 etc.
Surface Treatment	Hardening treatment, Nitriding treatment, electroplating treatment, etc
Steel material	Core/cavity:S136,2136,etc; mould base:P20,AISI1045,etc
Mould lifetime	1 million shots at least
Package	Standard export wooden case
Delivery time	45 days
Payment terms	T/T

 

 

Bottle cap mold is a highly efficient carriers that combine injection molding systems and materials science. At its core, it uses highly customized, high-quality mold steel cavities/cores to instantly mold molten plastic (such as PP or PE) under high injection pressure, followed by precise solidification through a cooling system, thereby producing multiple fully structured bottle caps. Mold design requires precise calculations of plastic shrinkage, flow balance, and cooling efficiency to ensure micron-level dimensional accuracy, tight thread fit, and stable opening torque. For example, a 28/30mm, 3.9g, 48-cavity bottle cap mold with a cycle time of 15-20 seconds can produce tens of millions of bottle caps annually. Its internal components may integrate complex mechanisms such as hydraulic core pullers and threaded rotary demolding to form complex functional structures like tamper-evident rings and internal threads. The durability of the mold directly determines the continuity of production; high-quality molds, if properly maintained, can withstand millions of cycles, forming the cornerstone of stable operation of automated production lines.

We are a professional manufacturer and supplier of plastic bottle cap mold, including water/beverage screw bottle cap mold, 5 gallon bottle cap mold, condiment bottle cap mold, sterilizer bottle cap mold, flip top cap bottle mould, etc.

 

If you want to learn more about the bottle cap injection mold, pls contact us directly by phone or email. Based on your cap samples & design drawings, combined with your expected production capacity per hour or day, and injection molding process conditions. We can provide you with a comprehensive evaluation, from mold structural optimization and material selection to production solutions. We are committed to controlling mold development costs while ensuring mold stability and production line compatibility, tailoring efficient and reliable overall solutions for you.

 

 

 

 

1. Raw material confirmation: PP/PE, etc. The shrinkage rate of the raw material is a crucial factor influencing the design of the bottle cap mold structure.

2. Bottle cap structure design confirmation, especially the internal thread size and pitch, anti-theft ring, and other design parameters, are critical. These are core factors ensuring the water cap's sealing performance.

3. Expected hourly/daily production capacity of the bottle cap mold, confirming the mold's production cycle and the required number of cavities.

4. Selection of hot runner and cold runner systems: For products with strict hygiene and cleanliness requirements, a hot runner system is recommended to avoid recycled materials.

5. Mold lifespan need: For products with high mold life requirements, it is recommended to use high wear-resistant and corrosion-resistant high quality steel (such as S136, H13) to ensure mold lifespan (Ensure over one million cycles).

6. Provision of injection molding machine parameters, especially the injection weight, tie rod spacing, and maximum mold thickness, to ensure the bottle cap mold matches the injection molding system.

7. Mold testing: Mail bottle cap samples to the customer for testing and confirmation.

 

 

 

 

We specialize in providing solutions for bottle cap injection molds, from design to mass production. At the initial project stage, we deeply engage with clients in product feasibility analysis, utilizing CAE (Computational Architecture and Engineering) to optimize the gating system and cooling scheme, ensuring the mold design combines superior precision, a stable demolding structure, and efficient production cycle. In the manufacturing process, Mold components are processed with high precision CNC equipment and high-quality mold steel, coupled with comprehensive quality inspection, guaranteeing a mold lifespan exceeding one million cycles.

We highly value mold trials and process development, systematically debugging to lock in optimal process parameters, ensuring that key performance indicators such as bottle cap torque and sealing fully meet standards. After mass production, we provide 24/7D after-sales technical support and regular maintenance guidance to ensure long term stable production efficiency. We are committed to becoming a reliable long-term partner for our clients, using professional technology and comprehensive services to help them successfully launch their products and maintain market competitiveness.

 

 

1. What is a bottle cap mold?

2. What are the different types of bottle cap molds?

3. The importance of airtightness in bottle cap molds?

4. The function of the anti-theft ring on water/beverage caps?

5. What are the differences between hot runner and cold runner structures in bottle cap injection molds?

6. How to determine the number of cavities in a bottle cap mold?

7. What factors affect the price of bottle cap molds?

 

1.What is a bottle cap mold?

Bottle cap injection molds are the core of the plastic packaging industry, widely used in beverages, food, cosmetics, etc. As environmental trends develop, molds are adapting to recyclable materials, driving technological upgrades. Market demand drives mold development towards higher speeds, higher precision, and higher stability. Product diversification drives mold customization, enhancing the added value and sustainability of packaging.

 

2.What are the different types of bottle cap molds?

Classified by market application: injection molds for water bottle caps, beverage bottle caps, shampoo bottle caps, oil bottle caps, chemical bottle caps, etc.;

Classified by cap structure: ordinary bottle cap molds, anti-theft ring bottle cap molds, folded-edge bottle cap injection molds, flip-top bottle cap molds, 5-gallon bottle cap molds, etc.;

Classified by mold structure: cold runner bottle cap molds, semi-hot runner bottle cap molds, hot runner bottle cap molds, etc.

 

3.The importance of airtightness in bottle caps?

The sealing performance of a bottle cap directly determines the quality and safety of packaged products. For water, juice, dairy products, or pharmaceuticals, a good seal effectively blocks the intrusion of external oxygen and microorganisms, preventing oxidation, spoilage, or decay, thus ensuring food safety and stable efficacy.

 

4.The function of the anti-theft ring on water/beverage caps?

When purchasing sealed-packaged beverages, consumers can check whether the anti-theft ring is intact to determine if the product has been opened or tampered with. Ensuring the hygiene and safety of pre-sales packaged beverages is the cornerstone of consumer trust.

 

5. What are the differences between hot runner and cold runner structures in bottle cap injection molds?

The core difference between hot runner and cold runner systems lies in their energy management of the molten plastic. Hot runner systems, through built-in heating and precise temperature control, keep the plastic within the runner in a molten state, allowing for direct injection into various cavities. Cold runner systems, on the other hand, maintain the same temperature as the mold body and rely on the mold's cooling system to simultaneously cool and solidify the plastic within the runner along with the product.

 

6. How to determine the number of cavities in a bottle cap mold?

The mold must function correctly on the selected injection molding machine. Key parameters of the injection mold machine's clamping force, injection volume, distance between tie bars, and max mold thickness. More cavities of mold require greater clamping force and mold size. The ideal number of cavities should fully utilize the machine's rated capacity, avoiding overloading or insufficient capacity.

 

7. What factors affect the price of bottle cap molds?

Key factors influencing mold prices include: mold complexity and structural design; number of cavities and mold dimensions; selection of mold materials and heat treatment; machining processes and precision requirements; and the choice of hot or cold runner systems. For example, the grade of steel used for core mold components (such as cores and cavities) is the cornerstone of price. Ordinary bottle caps may use pre-hardened steel (such as P20, 718), but for mass, long life requirements (such as over million cycles) or corrosive plastics, high-hardness, high-wear-resistance, and high-corrosion-resistance high-grade mold steels (such as S136, 718H, etc.) are required. These materials are inherently expensive, and subsequent processes such as vacuum heat treatment and cryogenic treatment further increase costs and time.