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Definition of silicone rubber:

Silicone is an industry name, it means a lot of exact names,such as silicon,silicone,silicone rubber,molding silicone,manual mold silicone,manual mold design silicone,pad printing silicone,printing silicone rubber,shoe mold silicone,RTV-2,RTV-1,room temperature vulcanization 

silicone,liquid silicone,HTV-1 silicone,mixed compound silicone,addition cure silicone,

Methyl alkenyl silicone,HTV-1,HTV-2,Hot Stamping silicone sheet,Silicone roller for printing,

silicone rubber tube,seal ring of silicone rubber,electronic potting silicone, LED viewing screen,LCD silicone,and so on.

Description 

Do you want to make an perfect  polymer clay molds, copy the same pattern and without any 

deformation ? our tin cure mold making silicone rubber in 25 to 30 shore A is specially designed for you . HY-625 and HY630 silicone is suitable for gypsum sculpture , statue and similar 

gypsum architectural decorations . 

Characteristics  

*Light viscosity to make a pourable gypsum mold 

* Thixotropic agent is available for brushable gypsum molds 

*Medium hardness from 25-30 shore A without deformation 

* Excellent tensile and tear strength with high copy times 

*Good flexibility 

Datasheet

Operate Instruction

(there is two opearation way: pouring and brusing. Today i am sharing the pouring with you. For the brushing way, i will share with you later)
1.Prepare all the tool for making silicone mold: plaster products, board, silicone rubber, release agent(Vaseline, soap water, detergent, liquid paraffin). then polish and smooth the plaster products,clean the surface and dry it for if you do not do that,the silicone mold will be striate and unsmooth.when you finished it, fixing the plaster products in a smooth board and circling it with 4 pieces of board to make a frame square. Then we need to brush the release agent on the plaster products and board to make it easy to demould.

2. Weight Part A and Part B in Electronic scale according to the mixing ration. The mixing ration of the condesation cure silicone rubber is 100:4 and the mixing ration of the addition cure silicone rubber is 1:1 or 10:1. It must be accurate for if it's wrong, it will cause the problem of uncure. For example: For condesation cure silicone rubber, we take 100g part A, then we need to take 4g part B to mix it. For addition cure silicone rubber, we take 100g part A, we need to take 10g or 100g part B to mix it, which depends on the mixing ration is 1:1 or 10:1.

3.Mix part A and part B evenly. If no, the silicone mold will be partly solidified. what's more, it will affect the duplication times, even causing the waste of silicone rubber, which means that we need to take the new material to do the silicone mold again.

4.Vacuum pumping. To make the silicone mold perfect, we need to use vacuum machine to release the air bubbles. we put the mixtuer into vacuum machine when we mix it evenly for 3-5mins. If the time is too long, it will cause cross linking reaction,which means the silicone cured in the vacuum machine and we need to take the new material to do the silicone mold again.

(PS: if we do not have vacuum machine, there is two way to relese the bubble. First, we can extend the operating time of the silicone rubber, letting it contact the air. it will be better. Second, for the condensation cure silicone rubber, we can reduce the mixing ratio of catalyst from 4% to 2-3%, then the reaction of mixture( part a and part b) will be slower and the bubble will be exhausted by itself.

5.Pouring. when finished the step 4, then we pouring the silicone rubber into the fram square from a corner, flowing it smoothly. 

6.Demoulding. If the operate time is 30-40 mins, then the curing time will be 4-5hrs under 25 degree. Usually the cure time is the 6 times of the operate time. so after 4-5 hrs later,we can demould the silicone mold. but we s est that it will be better to use it after 24 hrs.(ps: if we want the silicone mold looks beautiful, we can use the scissors to trim it). 

7. Pouring the material of your products into the silicone molds, like plaster, concrete or resin. when it cured, the products are finished.

Questions & Answers

Question:How many kgs of silicone i need to make a mold, like 1m*1m?

Answers: First, you change the "m" to "cm" . then the V(volume)=100cm(length)*100cm(width)*1.5cm(height or thickness) =15000cm3

→ the density of the liquid silicone is 1.1g/cm3→ the quantity= 15000cm3
* 1.1g/cm3=16500g(16.5kg) 

Question: How can i know the thickness of the silicone mold?

Answers: For the pouring way, if you do not have a plaster have a base to keep its shape(like square),then we usually s est that  2-3cm is enough. If yes, then 1-1.5 cm enough.

Question:  Why is there not enough 25kgs silicone in the drum? 

Answers: V=m/p. because the different of the silicone viscosity, so there will be a little diffenrence. when the viscosity is lower, there will be 26kgs or more. In contrast, there will be 24kgs or little.

Question: How can I know this silicone is suitable for my products?

Answers: For example, For plaster mold, we usually s est that using Shore A 20-30( plaster products is easy to deform, so we use soft silicone to make molds). For concrete, we use Shore A 30-40. Then we decide the specific one according to the product's size.


 

Our Services

1:  Reach the international standard high quality with competitive price !

2:  Passed the certificates including the  FDA, RoHS, MSDS, SGS,ISO9001:2000 !

3:  Online and on-site follow-up service for product demonstration !

4:  Free technical training on products usage and operation instructions !

5:  Free customer service to solve technical issues !

6:  Free mold opening technologies !

7:  Any of our products with quality problems will be replaced within 3 months after purchase !

Packaging & Shipping

Package
20KG/drum vacuum packing for part A + 20KG/drum vacuum packing for part B
200KG/drum packing for part A +200KG/drum packing for part B

Shelf life
 Twelve(12) months when stored under dry and cool place by original package under 25℃

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 Shenzhen Hong Ye Jie Technology Co., LTD.

Tel: 86-755-89212380

Fax: 86-755-89948030

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