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Automobile hydrogenated butadiene-acrylonitrile rubber PCV valve diaphragm forming die and machining method

A technology of hydrogenated nitrile rubber and forming molds, which is used in household appliances, other household appliances, applications, etc., can solve the problems of inability to prevent rubber spillage, inability to use brushing and spraying processes, and poor product appearance, so as to avoid appearance. The effect of improving production efficiency and product qualification rate, and saving vulcanization time

Inactive Publication Date: 2020-06-19
南京金三力橡塑有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in view of the particularity of the metal frame, traditional brushing and spraying processes cannot be used, and only dip coating can be used, and the dip coating method cannot prevent rubber from overflowing to the middle non-encapsulated part of the metal frame, which will cause product appearance. bad

Method used

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  • Automobile hydrogenated butadiene-acrylonitrile rubber PCV valve diaphragm forming die and machining method
  • Automobile hydrogenated butadiene-acrylonitrile rubber PCV valve diaphragm forming die and machining method
  • Automobile hydrogenated butadiene-acrylonitrile rubber PCV valve diaphragm forming die and machining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Combine figure 1 , The hydrogenated nitrile rubber PCV valve diaphragm molding mold for automobiles of this embodiment includes an upper mold 1, a middle mold 2 and a lower mold 3. The upper mold 1 and the middle mold 2 are closed to form an injection cavity 4, the middle mold 2 After being combined with the lower mold 3, a rubber cavity 6 and a metal skeleton cavity 8 are formed. The middle mold 2 is provided with a round cone shaped plastic injection hole 5 with a large upper and a small lower mold. The glue dot 9 is in communication with the rubber cavity 6 through a diversion port 11.

[0044] In the prior art, rubber is usually injected directly into the product cavity and extrusion molding is performed by using a mold. However, because the PCV valve diaphragm of the present invention has irregular shapes and relatively thin dimensions, if the rubber is directly injected into the product cavity, When the vulcanization molding is finished, the product is easily torn wh...

Embodiment 2

[0048] In this embodiment, a hydrogenated nitrile rubber PCV valve diaphragm molding die for automobiles has basically the same structure as Embodiment 1. Furthermore, in this embodiment, the upper mold 1 and the middle mold 2 are closed to form an injection cavity 4 The thickness is 0.3-0.5mm. Because the PCV valve diaphragm of this embodiment is relatively thin and does not require too much rubber material for injection molding, the size of the injection cavity 4 is too large, but it will affect the product yield, specifically in this embodiment The thickness of the middle injection pressure cavity 4 is 0.4 mm.

[0049] Further, in this embodiment, the mold 2 and the lower mold 3 are respectively provided with an upper edge sealing boss 201 and a lower edge sealing boss 301 along the non-encapsulated surface of the metal skeleton 7. Specifically, the upper edge sealing boss 201 in this embodiment The height between the lower edge sealing boss 301 and the lower edge sealing boss...

Embodiment 3

[0054] The method for processing a hydrogenated nitrile rubber PCV valve diaphragm for automobiles in this embodiment, using the above-mentioned mold for processing, specifically includes the following steps:

[0055] Step 1. Preparation of metal frame 7 and PCV valve diaphragm body rubber

[0056] Gasoline cleaning and drying of the metal frame 7, use the dipping method to dip the surface of the frame with adhesive CHEMLOKTS701-43, and dry it at 20℃~30℃ for 0.5~1 hour, and cut the PCV valve diaphragm according to the size of the forming mold Body rubber; specifically in this embodiment, the metal frame 7 is made of 304 stainless steel, with a maximum outer diameter of 18mm and a thickness of 0.4mm. The PCV valve diaphragm body rubber is 7-9mm in thickness and 40-45 grams in weight Square.

[0057] Step 2: Fill in the metal frame 7 and the body rubber of the PCV valve diaphragm

[0058] Assemble the forming mold on the plate vulcanizer, then place the metal skeleton 7 in the metal sk...

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Abstract

The invention discloses an automobile hydrogenated butadiene-acrylonitrile rubber PCV valve diaphragm forming die and machining method, and belongs to the field of rubber materials. The forming die comprises an upper die body, a middle die body and a lower die body, an injection cavity is formed after the upper die body and the middle die body are closed, a rubber cavity and a metal framework cavity are formed after the middle die body and the lower die body are closed, a big-end-up circular-truncated-cone-shaped glue injection hole is formed in the middle die body, glue injection points are correspondingly arranged on the lower die body, and the glue injection points communicate with the rubber cavity through a flow guide opening. According to the forming die, a rubber material is injected from the outside of the rubber cavity of the PCV valve diaphragm, so that a product is effectively prevented from being torn during demolding, the product does not need to be trimmed, the flow guideopening is beneficial to smooth flowing of the rubber material, and the discontinuity of the injection molding process is avoided. According to the machining method, the production efficiency and theproduct percent of pass are improved, the peel strength of the hydrogenated butadiene-acrylonitrile rubber from the metal framework is improved, and then the service life of the PCV valve diaphragm is prolonged.

Description

Technical field [0001] The invention belongs to the field of rubber materials, and more specifically, relates to a molding die and a processing method for a hydrogenated nitrile rubber PCV valve diaphragm for automobiles. Background technique [0002] In the PCV valve diaphragm, PCV is the abbreviation of the three English words POSITIVE, CRANKCASE, and VENTILATION (crankcase forced ventilation). The Chinese means the crankcase (or oil pan) active ventilation control system. The PCV valve is composed of a valve body, a valve, and a valve cover, which cannot be decomposed. It has a control valve connected to the intake pipe of the engine at one end and to the oil pan at the other end, so that after the engine is running, the vacuum generated by the intake can suck out the oil and gas in the oil pan and let it follow the fresh air. Enter the cylinder and burn them together to solve the pollution problem and realize energy saving. Its working principle is: PCV valve is a metering ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/52B29C33/00B29C35/02B29C37/02B29K19/00
CPCB29C65/52B29C66/742B29C33/0022B29C35/02B29C37/02B29L2031/7506B29K2019/00
Inventor 徐海潮何志刚魏二楼金国秋
Owner 南京金三力橡塑有限公司
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