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
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);
USM Blogo Opening
Oct 27, 2021Hello everyone! Our blog is open today, it is very glad to have the opportunity to meet you here, welcome to visit us whenever you need. USM is a professional plastic injection mold and molding...viewDesign principle of plastic injection mold cooling system
Feb 13, 2022Design principle of cooling system In order to improve the efficiency of the cooling system and make the cavity surface temperature distribution even, the following principles should be followed in...viewVacuum venting mold design for plastic molded parts
Mar 23, 2022There are some regular venting way which are parting surface venting, insert venting, insert pin venting and well-ventilated steel, but there is a special way is vacumm venting, it will need vacumm...viewDesign standard of exhaust slot
Mar 3, 2022The exhaust system should ensure that the gas in the cavity is smoothly discharged, and also prevent the material from entering and exhausting channels from causing flashing of the product or blockage...viewWhat is the side parting and core pulling mechanisms with their function?
May 31, 2022When there are holes, cavities or cores on the inside or outside of the injection-molded plastic parts that are different from the opening and closing directions of the mold, the plastic parts cannot...viewGas-assisted injection molding product defects and solutions
Apr 28, 2022Common defects and solutions of gas-assisted injection moulding: 1. Gas blows out the melt like in picture 1. Reason: insufficient pre-filled amount. When the plastic part is a locally thickened...view