The narrow and shallow portion of the runner as it enters the cavity is called the gate.
Runner and Gating Design Handbook: Tools for Successful Injection Molding
Listed here are the different types of gate with their characteristics. Sprue and runner are described here.
Side gate: This is the most commonly used gate type and is commonly used for mold structures with 2 or more cavities. It is placed at the side of the plastic product. The gate has to be cut manually by a cutter.
Submarine gate: The positioning of this gate is flexible thoughout the sides of the plastic product. It can be placed on the fixed or movable side of the mold but the design has to be thought about carefully so that the product will not be left inside the fixed cavity. The gate automatically cuts itself as the mold opens.
Fan gate: It is commonly used for large and flat plate products. It is placed at the side of the product – same as the side gate. The gate has to be cut manually by a cutter.
Film gate: Similar to fan gate except that it is commonly used for thin and flat plate products.
Pin gate: This is possible for molding multiple cavities or parts. The gate positioning is relatively flexible at the top side of the product. The runner layout is very flexible as well. The mold base structure is complicated because it uses a 3-plate method.
Runner and Gating Design Handbook: Tools for Successful Injection Molding
Banana gate: This is not a very common gate. It is used when the visible surface of the product requires no trace of the gate. The gate automatically cuts itself as the mold opens.
Direct gate: The sprue serves as the gate. It is placed on the top side of the product. The gate has to be cut manually by a cutter. This gate type can only produce one part per shot. The molding cost is low because the material from the runner was ellimenated. The injection pressure was reduced due to direct cavity filling. The simple mold structure makes the mold cost lower.
dear sir i was looking for Tab gate,which I would like to have by return email please.
Tab gate is mostly used for transparent objects
TYPES OF GATES
Simple, concise and very explicit.
Found exactly what I wanted to know.
injection mould all type gate point and all type runner knowege
Can you please mention the disadvantages,& when are individual gates that mandatery??????????
i got very useful information from here. thank so much
Thank you for a simple concise summary.
Is banana gate suitable for Polycarbonate moulding
Why
Please explain
how we design gate in mold and design of nozle
What does it means for VENT Gate?
I am a Proe/Ug/autoCAD/MarstercCAM/SolidWorks engineer.and compose.music tacher(piano,sax,guita..)
The mold knoweloge cool!I love it inmy design
Hello sir,
I want to know about vent design with self explanatory images and photo of molded part with the runner gate & vents before trimming.
Thanks in advance.
i want to know about basic difference between egde fan gate and submarine gate
definite, simple and precise approach
very helpful
Banana gate is used for which kind of article?
Banana gate is used for which moulding?
You can use banana gate if the appearance is critical. That is, if you don not want any markings of gate or ejector pins visible on one side of the product.
sir.
good morning totaly how many type gate?
Hi,
The gates mentioned above are for cold runner molds only. Basically there are 7.
Banana gate is also known as Winkle gate its mainly used in TV moulds and moreover components which needs no gate marks……..
hello sir,
may i know about gate and runner dimensions for different materials and different products.
It could easily be determined in Mold Flow analysis. There are engineering services offering MoldFlow.
If you have experience with the same material or product you could use the same gating system. Try design by experiment.
Are you a mold designer or a product designer?
Very good knowledge for your phenamenon
I found what I needed..But I would like to have detailing on gates…This is just fundamental….if it is explained by example will hekp better…Thank You.
You are welcome Mandar, I will give examples on my next post about gating.
i need advanced gate type runner system
i need advanced gate type system
what is the difference between sequence gate & normal gate?………………………
very useful information. thank you sir.
i need more engineering pleastic material gate size, design and useing method.
Pl. Send us parts of plastic moulds and materials.
@Joyamik
Please tell me what parts you want me to send to you.
i need the types of injection process validation formate & why its differ from eachother
there should be total information
……
HELLO SIR,
I AM STUDENT OF CIPET BHUBANESWAR NOW IN 3RD YEAR.
I AM INTEREST IN MOLD DESIGNING AND I WANT REMAIN IN THE-AT FIELD AND I COMPLETED AUTO-CAD , CATIA ,UNIGRAPHICS AND MOULD FLOW ANALYSIS COURSE.
WHERE IS THE BETTER OPTION TO APPLY FOR JOB.
Hello Goutam,
Where are you based? Catia and UG are used by big companies. Start looking for jobs in big companies. Small niche companies cannot afford Catia or UG but sometime they pay higher wages to highly skilled professionals. You’ll have a faster career growth in smaller companies especially if they are just starting up.
Good luck!
Dear Sir,I want to know “How to calculate and choose gating system for injection mold?”I am very interest in injection mold design.So, help me please.Thank you very much,sir.
You actually make it seem so easy with your presentation but I in finding this matter to be really one thing which I believe I’d by no means understand. It kind of feels too complicated and very wide for me. I’m taking a look ahead in your subsequent put up, I will try to get the grasp of it!
hello!,I love your writing so so much! share we keep in touch more about your post on AOL? I require a specialist on this area to resolve my problem. Maybe that is you! Looking ahead to see you.
plz help me . i want a book of complete mould design with runner & gates type……..what name of book…….
Hello Prem, you may first check the resin technical data, resin manufacturer sometimes provide gate design.
Hello, I moulded a texturing surface part with Banana gating, Cavity surface appear a gas mark on top of the Banana gate. I did try to adjusted the mould temperature, injection speed, pressure & holding pressure , time high and low, but problem still can’t solve.
Question:
(1)Is it a normal problem by moulding with tunnel gating?
(2) How can it be solve this problem?
Hello Calvin,
Sorry for very late reply. I guess you already find a solution to this problem.
Did you try applying vents?
Hi elito,
I design mold for nozzle, i have 8 cavity and interconnected each other like train. The material that i use is silicone, can you explain me the best gate for my mold, so there is no flashing in the tip of cavity. The cavity model like inverted mountain.
Thanks
-anton