Automotive Limiter MIM Parts

Introduction of MIM automotive stopper parts

Automotive limiter MIM Parts
Item	Material	Production Process		Sintering Temperature		Mold	Custom
Limiter	42crmo steel	Metal Injection Molding		1550℃		To be customized	Yes
Chemical Composition	C: 0.38~0.45 Si: 0.17~0.37 Mn:0.50~0.80 S: Allowable residual content≤0.035 P: allowable residual content ≤ 0.035 Cr:0.90~1.20 Ni: Allowable residual content≤0.030 Cu: allowable residual content≤0.030 Mo: 0.15~0.25
Available Materials	Low carbon stainless steel, titanium alloy (Ti, TC4), copper alloy, tungsten alloy, cemented carbide, high temperature alloy (718, 713)
Finish	Dimensional Accuracy		Product Density		Appearance Treatment			Appropriate Weight
Roughness 1～5μm	（±0.1%～±0.5%）		92～95%		Mirror Reflection			0.03g～400g）

With the improvement of people's living standards, cars have gradually entered people's lives, and for people, cars are very important, whether it is daily work or going out to play, cars are the first choice, in order to better understand Our car, we need to know more about the car knowledge, so today I will introduce to you what the car limiter is!

What is a car limiter?

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The function of the door opening limiter (Door check) is to limit the degree of door opening. On the one hand, it can limit the maximum opening of the door, preventing the door from being opened too far, on the other hand, it can keep the door open when needed, such as when the car is parked on a ramp or when the wind is blowing, the door will not automatically. close. The common door opening limiter is a separate pull-belt limiter, and some limiters are integrated with the door hinge, which usually has a limit function when the door is fully opened or half-opened.

Classification of car limiters

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1. Rubber spring type

The working principle is as follows: the limiter bracket is fastened to the vehicle body by a mounting bolt, and the limit box is fastened to the door with two mounting screws. When the door is opened, the limit box will move along the limit arm. Due to the structure of different heights on the limit arm, the elastic rubber block will have different elastic deformation, so that people need to use different forces to close the door when opening the door. At each limit position, it can play a limiting role on the door. This structure is the most widely used at present, and there are many specific forms: some limit arms are stamped structures, some limit boxes use needle rollers, some limit boxes use balls, and some limit boxes use balls. A slider is used in the limit box...but the principle of limit is the same. The advantages of this structure are simple structure, low cost, small occupied space and maintenance-free. The disadvantage is that the requirements for sheet metal are too high. If the hinge strength is not enough, the door will sink, and abnormal noise may occur. After running for a period of time, the limit torque will decrease rapidly. The door stopper of this structure generally has two or three gears. Its maximum torque is about 35N.m, its length is generally about 60mm, and its maximum opening angle is generally below 70 degrees. After the endurance test, the torque change is about 30 %-40%.

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2. Torsion spring type

Its working principle is: it is integrated with the hinge and is usually installed on the lower hinge. In the process of closing the door, the torsion bar is deformed to generate different forces to achieve the purpose of limiting the position. This structure is mostly used in the European car market and belongs to the patent of Edscia. The advantages of this structure are low noise, long life, and good limiting effect. The disadvantage is that it occupies a large space, the structure is complex, and the maintenance cost is high. The limiter of this structure generally has two or three gears. Its maximum opening torque is 45N.m, the maximum closing torque is 50N.m, and the maximum opening angle is about 60-65 degrees. After the endurance test, the torque change is about 15% or so.

Our Service

Pre-sale

Evaluate according to drawings or products, calculate the price, and submit it to the buyer for confirmation

On sale

The production process of all products is supported by the production system and delivered according to the mutually agreed time. (If the size of the drawing needs to be changed in the middle, the buyer is responsible for the inconsistency with the original drawing. If we fail to meet customer requirements during the modification process, a full refund will be given)

After sales

After handing over the product, we will seal all the buyer's molds for safekeeping.

(Problem solving) If there is a second or third revision in the production process, we will reply within 1 hour at the earliest, and we will solve customer problems within 8 hours at the latest depending on the situation of products that need to be evaluated.

Why Choose US?

Our R&D team	Zhongwei Precision Co., Ltd. and Central South University have a R&D team of 10 people. They develop more than 400 products each year, which is more than 68% higher than the same industry, and have obtained more than 20 patent certificates.
Our technical team	Zhongwei Precision has 5 professional engineers in the field of metal injection molding, and 15 technicians responsible for workshop management.
Our philosophy on quality management	1. Focus on the customer Organizations depend on customers, so organizations should understand customers' current and future needs in order to meet customer requirements and exceed their expectations. 2. Leadership Organizers unify the purpose, direction and internal environment of the organization and create an environment in which employees can fully participate in the achievement of organizational goals. 80% of quality problems are related to management and 20% are related to employees. 3. Full participation Employees at all levels are the foundation of the organization's survival and development, and only with their full participation can they bring benefits to the organization. Job responsibilities include all staff (from general manager to grassroots staff). 4. Process Approach Manage related resources and activities as a process to achieve desired results more efficiently. Flowchart method. 5. A systematic approach to management Identifying, understanding, and managing a system of interrelated processes against set objectives contributes to the effectiveness and efficiency of an organization. The principle of the hoarding of the wooden bucket. 6. Continuous Improvement It is an eternal development goal of the organization. PDCA cycle. 7. A fact-based approach to decision-making: Logical analysis or judgment of data and information is the basis for effective decision-making. Speak with data and facts. 8. Mutually beneficial supplier relationships Enhance the ability of the organization and its suppliers to create value through mutually beneficial relationships.
Device resources	The company has 10 MIM production lines, CNC and intelligent automated production workshops for production lines, which can guarantee the production of millions of MIM parts per day.
System Certification	ISO9001, ISO14001, IATF16949 certification
Port	It is 200 kilometers away from Tianjin Port, and goods can arrive at the port within 24 hours.

Process After Sintering

1. Heat treatment: annealing, carbonization, tempering, quenching, normalizing, surface tempering

2. Processing equipment: CNC, WEDM, lathe, milling machine, drilling machine, grinder, etc.;

3. Surface treatment: anodizing, powder spraying, chrome plating, painting, sandblasting, nickel plating, galvanizing, blackening, polishing, bluing, etc.

Moulds and Inspection Fixtures

1. Mold service life: usually semi-permanent. (except for lost foam)

2. Mold delivery time: 10-25 days, (according to product structure and product size).

3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.

Quality Control

1. Quality control: the defective rate is less than 0.1%.

2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements.

3. Testing equipment: flaw detection, spectrum analyzer, golden image analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine.