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Dongguan HongS Jingyan Hot Runner Technology Co., Ltd.
Shenzhen HongS Hot Runner Technology Co., Ltd.
Jiangxi HongS Mould Co., Ltd.

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AddressPeasant Industrial Zone, Tianwei, Fenggang Town, Dongguan City, Guangdong Province

Company news HOME >> News >> Company news

What is a hot runner - the second chapter
Issuing Time:2018-09-01

difference


1. For forming oversized products:


Preform mold using hot runner


Preform mold using hot runner


The hot runner must be used to make the plastic flow~ for example: car inner liner, balance bar, etc., need more places to be poured at the same time or sequentially.


2. Lateral pouring from the center of the injection molding machine:


Casting by hot runner method can make the structure of the mold simple, easy to form, speed up the forming speed, reduce the material head during forming, and save the cost of raw materials...


Disadvantage


1. The three-plate method must be on the guide tip when it is shot every time.


Three-plate mode


Three-plate mode


Sliding, even if the new product is available, the mold life is not long.


2. In the three-plate mode, the amount of movement of the down sprue from the mold is greater than the amount of template movement necessary to take out the molded article from the mold at each ejection.


3. When pouring from the ejector side, or when using a longer sprue:


It can eliminate the problems caused by too long material heads, such as: reduced mold stroke, saving head residue, easy forming, no shrinkage, no flow marks, etc.


4. For some large or allowed products to be poured by the center:


(1) A hot runner can be used instead of a three-plate mold to avoid unnecessary movement of the former template.


(2) In the method of using the three-plate mold, the mother template must be moved to take out the material head. If the hot runner forming method is used, the mold opening movement can shorten the movement necessary to remove the material head, thereby increasing the thickness of the mold. When a large forming machine can be used for production, a small forming machine can be used after using a hot runner.


5. Objects that are more difficult to form:


For example: high viscosity, low viscosity, high forming temperature..., hot runner system can solve this problem.


Specific examples: metal powder injection, ceramic powder injection, injection of plastic magnets, injection of plastic bearings, thermoplastic rubber (TPE), etc.


6. It can be combined with the design of the three-plate model to reduce the travel required for the material removal:


When using a hot runner in a three-plate mold, it has the following advantages:


(1) The material head is easy to take out, and the stroke of the material removal head can be reduced.


(2) When the material is shot, the material flow is relatively average, and the operating conditions of each injection point can be separately controlled, and the injection is relatively easy.


(3) Saving material costs.


7. Saving material costs and labor costs:


Save material


(1) The cost of the cold head (loss of interest).


A simple example: if the cold head accounts for 68% of the scrap rate (1 kg of material can only produce 320 g of product at the time of manufacture, and 680 g of the crucible is a cold head).


(2) Although the cold head is still recoverable, due to the factors of manpower, the mixing ratio of the recycled materials, etc., in order to maintain normal operation, some cold heads must be accumulated, thus causing the retention of funds.


If the material cost is 100 yuan / kg, and the accumulated waste is 500 kg, the backlog of funds required per day will be as high as 500 × 0.68 × 100 = 34,000 yuan, so its loss on interest is about 200 yuan per day, long-term , the amount is considerable.


8. When the high-speed injection molding:


High-speed injection molding not only improve forming efficiency, as the thickness of the meat indispensable cups, containers and the like ...... molding.


9. When using stackmold:


For some shallow, a large number of products, for example: CD housing, products of small particles, only 15% of the clamping force, at the same time emits, to 80% increase in yield.


⒑ environmental issues and efficiency issues:


Since hot runners do not produce "garbage", there is no question of dealing with "garbage".


The so-called "garbage" means:


(1) Waste of resources: analysis of the process of plastic injection molding ──


(2) It does not occupy the storage head space, and there is no problem of noise and deterioration of the mincing.


Due to the wide variety of plastics and the variety of colors, it is often necessary to occupy a lot of space on the land with a lot of money because of the accumulation of materials. At the same time, a lot of funds have been accumulated.


At the same time, the noise must affect the tranquility due to the grinding, and the poor working environment affects the morale of the work.