FAQ Mouldings

/FAQ Mouldings
FAQ Mouldings 2017-03-18T09:05:52+00:00
Matte Finish–SPI D class mold finish standard 2017-03-18T09:05:52+00:00

Non-Cosmetic, Dry Blast, Matte Finish

  • SPI Finish D-1 — 600 Stone Prior to Dry Blast Glass Bead #11
  • SPI Finish D-2 — 400 Stone Prior to Dry Blast #240 Oxide
  • SPI Finish D-3 — 320 Stone Prior to Dry Blast #24 Oxide
Stone Polish-SPI C class mold finish standard 2017-03-18T09:05:52+00:00

Non-Cosmetic, Stone Polish

  • SPI Finish C-1 — 600 Grit Stone
  • SPI Finish C-2 — 400 Grit Stone
  • SPI Finish C-3 — 320 Grit Stone
Cosmetic finish-SPI B Mold finish standard- 2017-03-18T09:06:03+00:00
  • SPI Finish B-1 — 600 Grit Paper
  • SPI Finish B-2 — 400 Grit Paper
  • SPI Finish B-3 — 320 Grit Paper
SPI-A Class mold finish standard 2017-03-18T09:06:04+00:00

High Quality, Optical Quality

  • SPI Finish A-1 — Grade #3, 6000 Grit Diamond Buff
  • SPI Finish A-2 — Grade #6, 3000 Grit Diamond Buff
  • SPI Finish A-3 — Grade #15, 1200 Grit Diamond Buff
SPI Class 104 Mold Standard -SPI AN-102-78 2016-10-06T10:26:13+00:00

(Rated for under 100000 cycles)

Mold design recommended.

Mold base can be of mild

steel or aluminum. Cores and cavities can be of aluminum mild steel or any other agreed

upon metal. All other extras optional.

SPI Class 103 Mold Standard -SPI AN-102-78 2016-10-06T10:24:35+00:00

Rated for under 500000 cycles

Mold design recommended

Mold base should be a minimum hardness of 165 BHN. Cores and cavities must be 280 BHN or higher. All other

extras optional.

SPI Class 102 Mold Standard -SPI AN-102-78 2017-03-18T09:06:04+00:00

Rated for no more than one million cycles。

Molds design required.

This mold is identical to the type 101 with the following items not required:

1.guided ejection hardened slide wear plates plated water channels and wear plated cavities.

2.All other extras are optional. This tool is a medium to high production tool that is good for abrasive materials and / or close

tolerance products.

 

SPI Class 101 Mold Standard -SPI AN-102-78 2017-03-18T09:06:04+00:00

(Rated for one million or more cycles) Mold design required.

  • Mold base should be a minimum hardness of 280 BHN.Molding surfaces (cavities and cores) must be hardened to a minimum of 48 RC
  • All other details such as slides heel blocks gibs wedge blocks etc. should also be of hardened tool steels.
  • Ejection should be guided. Slides must have wear plates. Temperature control provisions to be in cavities cores and slides wherever possible.
  • Over the life of the mold corrosion in the cooling channels decreases cooling efficiency thus degrading part quality and increasing cycle time.
  • It is therefore recommended that plates or inserts containing cooling channels be of a corrosive resistant material or treated to prevent corrosion. Parting line locks are required on all molds.
What materials are soft ? 2015-11-30T08:24:07+00:00

TPE/TPU/Rubber/Silicone are soft/elastic plastics
Soft materials allow some certain undercuts.

TPE/TPU are often used for soft touching and bendable structures.

PP is half-soft plastic in some sense. In packaging industry, PP is widely used to make live hinges in the caps.

SPI mold classification 2015-06-16T01:12:56+00:00

This section contains a brief synopsis of the various mold classifications. The following section contains detailed descriptions of each mold class. It is our recommendation that this “mold information” sheet be included with each request for quotation.

TYPE 1O1 MOLD
Cycles: One million or more
Description: Built for extremely high production. This is the highest price mold and is made with only the highest quality materials.

TYPE 102 MOLD
Cycles: Not exceeding one million
Description: Medium to high production mold, good for abrasive materials and/or parts requiring tolerances. This is a high quality, fairly high priced mold.

TYPE 103 MOLD
Cycles: Under 500,000
Description: Medium production mold. This is a very popular mold for low to medium production needs. Most common price range.

TYPE 104 MOLD
Cycles: Under 100,000
Description: Low production mold. Used only for limited production preferably with non-abrasive materials. Low to moderate price range.

TYPE 105 MOLD
Cycles: Not exceeding 500
Description: Prototype only. This mold will be constructed in the least expensive manner possible to produce a very limited quantity of product.

TYPE I UNIT INSERT
Cycles: Approximately 500,000
Description: Top quality materials for medium to high production requirements.

TYPE II UNIT INSERT
Cycles: Under 100,000
Description: Similar to Class III Mold. Most commonly used insert. Low to medium production.

TYPE III UNIT INSERT
Cycles: Less than 500
Description: Similar to Class V Mold. Least expensive insert for very limited quantities. Insert built with the least expensive materials

Do you work with SPI standard? 2015-06-15T01:46:52+00:00

Yes we embrace SPI and other international plastic and molding standards.

GLOSSY SURFACE, DIAMOND BUFF POLISH

SPI Finish A-1 — Grade #3, 6000 Grit Diamond Buff

SPI Finish A-2 — Grade #6, 3000 Grit Diamond Buff

SPI Finish A-3 — Grade #15, 1200 Grit Diamond Buff

NON-GLOSSY SURFACE, PAPER POLISH

SPI Finish B-1 — 600 Grit Paper

SPI Finish B-2 — 400 Grit Paper

SPI Finish B-3 — 320 Grit Paper

ROUGH SURFACE, STONE POLISH

SPI Finish C-1 — 600 Grit Stone

SPI Finish C-2 — 400 Grit Stone

SPI Finish C-3 — 320 Grit Stone

VERY ROUGH SURFACE, DRY BLASH POLISH

SPI Finish D-1 — 600 Stone Prior to Dry Blast Glass Bead #11

SPI Finish D-2 — 400 Stone Prior to Dry Blast #240 Oxide

SPI Finish D-3 — 320 Stone Prior to Dry Blast #24 Oxide

 

SPI Finish A1 – S136 Hardness at 54HRC

(Generally called “Super High Glossy” in China)

SPI Finish A2 – 718HH or NAK80 Hardness at 40HRC

(Generally called “High Glossy” in China)

SPI Finish A3 – 718H or S136 Hardness 32HRC

How to make good surface? 2017-03-18T09:06:04+00:00

Surface depends on many factors

  • mold requirements.you need to specify the surface demands or code.
  • mold design.Parting line and parting surfaces will affect the surfaces.
  • material choice, some materials will never get high quality surface.
  • painting. The right painting will improve surface look and faces

 

How long it takes to build the tooling? 2017-03-18T09:06:04+00:00

Tooling Delivery time depends on :

  • Surface requirements, which decide what process we need to go and what machines we can use;
  • Part Size,which decide how many materials we need to cut and how much time we need to assemble;
  • Part Size,which decide how many materials we need to cut and how much time we need to assemble;
  • Design modifications.In some cases, designs are not ready to do the tooling without modifications made by or with consent of our clients;

 

What decide the unit cost? 2017-03-18T09:06:04+00:00
  • Part weight, materials cost
  • Part Materials, PP/ABS/PE/PS /PC are cheap material, PA/PA66/POM are much more expensive;
  • Injection time, more time ,more expensive 
  • Injection machines, bigger machines cost more
  • Quantity, the larger , the price is better

It is our responsibility to suggest suitable materials, design good tooling so we can produce in less time with smaller injection machines

The more we know about your project, the better we can help you
What affect the cost of mold making most? 2017-03-18T09:06:04+00:00
  • Requirements on the mold.Surface, hot runner, lifespan,accuracy, cavities
  • Part  complexity. Snap-cut/slides/side cores/hydraulic pumping, it add cost
  • Part size;Size all depend on the materials we will have to use
  • Lead time, urgent orders cost more

 

 

What materials are food grade? 2014-08-22T09:47:27+00:00

PP,PETG,ABS of some models, Nylon of some models,Silicon etc.

Why do we need moldflow analysis? 2014-01-13T10:16:37+00:00

Moldflow analysis is a necessary procedure in mold design ,before mold making.