Slider spring hength and strength calculation

Processing size:

1. ØD2=ØD+2

2. Ll = total spring length (L) - preload value of spring (N) - slider core pulling distance (L2)


Spring length calculation: (refer to picture 1 for length calculation)

★L≥H/(36%(compression percentage)-10%(pre-compression percentage)

Assuming the core pulling distance (L2)=15m, the total length of the spring L≥15/(36%-10%)=15/0.26=57.7

As we can see that the total length of the spring (L) should be taken as 60mm

Spring hole depth L1=L-L*10%-L2=60-60*10%-15=39mm


Slider_spring_hength_and_strength_calculation_.jpg


Strength requirements of the slider spring:

1. When the spring is applied to the core pulling of the slider, the load strength must be checked;

2. The weight of the slider on the top side must be kept within 2/3 of the maximum load of the spring; the weight of other sliders must be kept within the maximum load of the spring;

3. When the same slider uses multiple springs, the maximum spring load of the slider is the sum of the loads of all springs;

4. When calculating the maximum load of the slider spring, the compression amount should be in the pull-out state of the slider;


The spring load is calculated as follows:


Picture 2:

1. The slider is in the extracted state, so the length of the spring after being compressed is L1;

2. Assume that the free length of the spring is L;

Calculation way of spring load: load = spring constant X compression

                   That is: load = spring constant X (L-L1)

The spring constant can be obtained from the standard parts data of the corresponding brand (such as MISUMI);



Slider_spring_hength_and_strength_calculation_03.jpg

Related News about USM Injection Mold
  • The design requirements of slider wear plate

    The design requirements of slider wear plate

    Jan 2, 20241. The wear plate of slider requires hardening treatment, with a hardness of 45-48HRC; 2. The friction surface of the wear plate is required to be 1.0mm higher than the slider surface (see picture-1);...view
  • What is Called Draft Angle?

    What is Called Draft Angle?

    Dec 29, 2021The draft angle is also called demold angle and angle which is used for product removal from the mold and designed on the parting surface, the angle is called draft angle which shows in picture 1....view
  • The main design points of the design of the plastic mold pouring system

    The main design points of the design of the plastic mold pouring system

    Jan 11, 2022The main runner is the part where the molten plastic first passes when it is sprayed from the injection nozzle, and it is coaxial with the injection nozzle, because of repeated contact and collision...view
  • Key points of gas-assisted injection molding process

    Key points of gas-assisted injection molding process

    Apr 20, 2022Gas injection parameters The gas-assisted control part is a device that controls the gas pressure in each stage, the gas-assisted parameters have only two values: gas injection time (seconds) and gas...view
  • Slider designing tips 1

    Slider designing tips 1

    Aug 3, 20221. After the slider core pulls out, the length of staying in the guide pin slot should not be less than 2/3 of the total length of the slider, for special cases, the slider slot can be partially...view
  • What is Ejection Molding?

    What is Ejection Molding?

    Dec 28, 2021The process to get injection molded products is called injection molding, or called injection. Injection molding is an important method in polymer molding processing, it is characterized by a short...view