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  Mould Blog

Sino Mould Co., Ltd
Add : 369# XinJiang Rd., Xinqian Street, Huangyan Taizhou, Zhejiang, China
P.C. 318020
Tel : 86 576 84086666
Tel : 86 576 84023777
Fax : 86 576 84018996
Email :sino-mould@hotmail.com

Pubdate 2013-07-02 11:27

Sino is top Chinese crate mould manufacturer. It offers moulds for various crates such as fruit crate, milk crate, large industrial crate, beer crate, foldable crate etc.

For crate, it is very important to have good stacking, high strenth and control weight. We could manage this very well.

We could offer crate mould with 1,2,4 cavity. If you have large injection machine and need high output, we could offer you multicavity crate mould.

For beer crates, we suggest 4 point or 6 point hot runner for easy full shot. We could also avoid decentration with high precision NC lathe.
To shorten the cycle time, we suggest add Copper Beryllium and use cooling bar to have better cooling system.

The technical point is not so much in crate mould making, but it is not easy to make a good crate mould, especially for beer crate.
Usually the beer crate has 16, 20 or 24 bottles, if your beer crate is different, we could offer you custom-made solution.

If you have crate project, please come to sino mould, we will be your wise choice.
 

Pubdate 2013-07-02 10:32

 

Chair is indispensible furniture in everyday life. Modern chair has many different types, from shape to material, to moulding technology.
Sino mould offers moulds for armchair, side chair, children chair, bi-injection chair and gas-aided chair.
 


Often, customers would like to have several interchangeable back plates and seat plates. With the same mould, and for example 3 back plates and 2 seat plates, and produce 4 colors, the customer could produce 24 different appearance chairs.
We offer chair mould with automatic drop. Also, robot could help to pick the chair and it is more convenient. For automatic drop needs to uplift the injection machine.
For customers needing a whole production line, we can help design the production line, offer equipmen, installation, and training. Equipment includes: chair mould, injection machine and auxiliary machines.
Gas-aided chair usually has a modern appearance with special meterial. Because the processing of gas-aided chair mould is high technical and the structure complex, the price is much higher than normal chair moulds.
If you have chair project, please come to sino mould.
Pubdate 2013-07-02 09:59

Disposable syringe is a main product of medical use. Sino Holdings Group offers complete disposable syringe production line for customers from all around the world. We offer customers turnkey solution.
The complete production line includes moulds, injection machine(syringe production machine), other machines such as printing machine, factory services (building and power not included), installation and training, after-sales services, etc.
Sino is leading Chinese mould manufacturer. We are syringe mould manufacturer.


For a complete syringe, five moulds are needed. They are barrel mould, plunger mould, gasket mould, needle cap mould and hub mould. With needle together, they could form a syringe.
For barrel and plunger, we could manage from 0.5ml to 60ml, the cavities number from 16 cavities to 128 cavities. For gasket, we could manage from 1ml to 50 ml, and cavity number up to 160 cavities.
As a group company, Sino offers injection machine and other auxiliary machines, such as auto-loader etc. Injection machine to produce syringe is usually not big machine, even with large cavity NO.
You could get your production line ready in about 2-3 months, including factory design, production line design, mould and machine manufacturer, anti-dust workshop setup, top crane and machine installation, staff training etc.
Sino offer not only a mould, but a fine solution. If you need a solution for your syringe project, please come to Sino mould.
 
Pubdate 2013-07-02 09:30

Medical mould maker and exporter Huangyan produce many kinds of the medical moulds, such as barrel mould, spring mould and so on.

Sino Mould Co.,Ltd specialized in the barrel mould from 0.5-100cc.We use the steel material Stavax S420 to make the mould, which can make the mould life longer. And we also ever  made the mould with 64 cavities to meet client’s requirement. We are develop[ing barrel mould with 128cavities.

We also have a brother company—Dakumar Machinery. If you have any requirement, we can equip the injection machine for you!

If you have a problem, please do not hesitate to contact me.

Posted by Snow

Email: export3@cnmould.cn   export9@dakumar.cn
Skype:sinogroupe-71
 


 

 

Pubdate 2013-07-01 08:58

We are the plastic injection mould manufacture with more than 20 years experience. We have five branch companies. Each branch company specially manufacture one area plastic project mould.

Sino Pipe Fitting mould company Ltd. is specially manufacture pipe fitting moulds. For example:Pvc pipe fitting moulds, PP pipe fitting moulds, PPR pipe fitting moulds…. Sino Auto mould company., Ltd. is specially manufacture auto parts. Sino Mould is specially manufacture different kinds of house commodity moulds.

If you have any inquiry for any plastic moulds, Please feel free to contact with me.
Julia

service1@cnmould.com

 

Pubdate 2013-07-01 08:45

In machining, boring is the process of enlarging a hole that has already been drilled(or cast), by means of a single-point cutting tool (or of a boring head contacting several such tools), for example as in boring a cannon barrel. Boring is used to achieve greater accuracy of the diameter of a hole, and can be used to cut a tapered hole.

The boring machining process can be carried out on a lathe for smaller operations, but for larger production pieces a special boring mill(work piece rotation around a vertical axis) or a horizontal boring machine piece and the tool bit can be changed about two axes to cut both vertically and horizontally into the internal surface. A tapered hole can also be made by swiveling the head.

Because boring machining is meant to decrease the Product tolerances on pre-existing holes, several design considerations must be made . First, large length-to-bore-diameters are not preferred due to cutting tool deflection. Next, through holes are preferred over blind holes( holes that do not traverse the thickness of the work piece). Interrupted internal working surfaces-where the cutting tool and surface have discontinuous contact-should be avoided. The boring bar Is the protruding arm of the machine that holds cutting tools, and must be very rigid.
 

 

Posted by Julia

Service1@cnmould.com

Pubdate 2013-06-30 17:24

       Plastic mold has been developing about 40 years. Plastic injection mold plays a very important role in the mold industry,from household Appliance to Military,auto and Aero etc, The proportion of plastic mold in the import and export is as high as 50% to 60% these years.It becomes a comprehensive science and technology. At the same time, people has more and more understanding of polymers and the manufacturing process of the various parameters and change more and more in-depth understanding. The design of mold comes to a new stage as a means of quantify and simulation computer-based. Compared with plastic mold CAD/CAM and the traditional design methods, not only quality, speed and precision but also the mold manufacturing methods and productivity has a significant leap forward. China can supply plastic mould for kinds of pipe fittings, such as PPR; PVC ;PE; PB; ABS…to the world.The features of molds: high precision, extended service life, short lead time, competitive price, prompt delivery and excellent after-sale service. Since china entered to WTO, it has brought great challenges and brought more opportunities for the plastic mold industry. There is a great advantage on the price because the plastic mold mostly is middle and lower level products in china. Some products even sell 1/5 to 1/3 on the price of foreign products.

Contact person;Ally

Skype:sino.group10

E-mail:service19@sinomould.com
 

Pubdate 2013-06-29 16:36

Milling machining  is the most common form of machining, a material removal process, which can create a variety of features on a part by cutting away the unwated material. The milling process requires amilling machining, workpiece, fixture, and cutter. The workpiece is a piece of pre-shaped material that is secured to the fixture, which itself is attached to a platform inside the milling machine. The cutter is a cutting machine. The cutter is a cutting tool with sharp teeth that is also secured in the milling machine and rotates at high speeds. By feeding the workpiece into the rotating cutter, material is cut away from this workpiece in the form of small chips to create the desired shape.

Milling machine can be found in the variety of sizes and designs yet they still possess the same main components that enable the workpiece to be moved in three direction relative to the tool.A manual milling machining requires the operator to control the motion of the cutter during the milling operation. The operator adjusts the position of the cutter by using hand cranks that move the table, saddle, and knee.
 

Posted by Julia

Service1@cnmould.com

Pubdate 2013-06-29 16:20

Turning machining is a form of machining, a material removal process, which is used to create rotational parts by cutting way unwanted material. The turning process requires a turning machining or lathe, workpiece is a piece of pre-shaped material that is allowed to rotate at high speeds. The cutter is typically a single-point cutting tool that is also secured in the machine, although some operations make used of multi-point tools. The cutting tool feeds into the totation workpiece and cuts ayway material in the form of small chips to create the desired shape.

Turning is used to produce rotational, typically axi-symmetric, parts that have many features, such as holes, grooves, threads, tapers, various diameter steps, and even contoured surfaces. Parts that are fabricated completely through turning often include components that are used in limited quantities, perhaps for prototypes, such as custom designed shafts and fasteners. Turning is also commonly used as a secondary process to process. Due to the high tolerances and surface finishes that turning can offer, it is ideal for adding precission rotational features to a parts whose basic shape has already been formed.
 

Pubdate 2013-06-29 16:16

Because the soket head cap screw in mould is more stable and the tip of the screw is not out side can realize the mould better appearance of mould. The socket head screw in mould is widely used in the plastic moulds. There are mostly used screw M6~M12

We should pay to the bellowing points during making the mould design:
1) The screw in mould specification is normally decide by the mould plate size , thickness and the designer’s experience. The middle size and small size mould normally will use M6 M8 M10 M12 and so on. Large size mould can use M12 M16 or bigger specification. While if we choose bigger size screw, the difficulty in making screw hole is bigger.
2) It’s better to make the screw more close to the parts need to be fixed. And also the distribution of screw should be average.
3) The deepness of the crew hole should not too light or too tight. If it is too light, the parts could not be fixed. If it is too tight, it will be very difficult to disassemble the mould.

Posted by Julia
Service1@cnmould.com
 

Pubdate 2013-06-29 15:40

The gas assistedinjection molding process has add new level of flexibility to the design and manufacturing of injection molded plastic parts. Like structure foam molding, the gas assisted injection molding process is a modification of the conventional injection molding process. However, the gas assist process offers a great benefit in terms of part design freedom, and is being widely used in automotive, business machine, and consumer product markets, Conventional injection molding, the gas assist process is more critical in term of process control, the gas assist process is more critical in terms of process control, especially for multi-cavity applications.

Unlike conventional injection molding, where the wall thickness of the part are determined by the tool geometry, the distributions of wall thickness for the gas assisted injeciton molding process are determined both by the tool and by process variables such as the degree of under fill, gas injection conditions and mold temperature indicating the added importance of precise process control.

Alimited description of the gas assisted molding technology is given here. The gas assist injection molding process is most commonly used for thick wall parts such as tubes, handles, or channel type frames

Posted by Julia

Service1@cnmould.com
 

Pubdate 2013-06-28 20:12

Injection mold, injection molding conditions and plastic injection mould supplier,injection mould maker,China best injection mould supplier
In injection mould design and manufacture, injection molding has the following three points:
1, the mold temperature. Mold temperature is one of the key factors affecting the molding. Generally high to fill mold temperature, mold temperature imbalance will seriously affect the packing. So when the mass production need regular replacement of cooling water and cleaning the mould waterway,
2, the molding time. The holding pressure and holding time is too long can cause mold release products hole area when white inequality, cracking and surface defects.
3, material preheat. Fully dry before injection, especially the surface gloss of plastics should be required to preheat and dry for a long time.
Because of the influence of the mold temperature on the molding shrinkage ratio is large, but also directly affect the mechanical properties of injection molding products, so we must keep the mold in the specified temperature range, but also to make the mold temperature changes over time. Multi-cavity mould temperature difference between the cavity will not change. Therefore, must be taken in the mold design to mold heating or cooling temperature control measures, and in order to make the mold temperature to minimize of each cavity q, must pay attention to cooling circuit design. Generally can be set up separately for each cavity cooling waterway, and in the cavity cooling water outlet flow control device.

Posted by Vicky

Click here contact me:sinomould-06
Pubdate 2013-06-28 20:02

Below to introduce the characteristics of several kinds of the most common type of plastic.
A: PVC (polyvinyl chloride)
Heat-sensitive plastic, generally can be divided into hard and soft, add the amount of plasticizer, the difference is that raw material is less than 10% of the hard, more than 30% were soft.
Features: (1) no obvious melting point, soften 60℃, 100 ℃ ~ 150 ℃, viscoelastic state 140 ℃ melting, decomposition at the same time, the 170 ℃ decompose rapidly, softening point close to the decomposition, decomposition in HC1 gas release.
(2) thermal stability is poor, temperature, time will lead to decompose, liquidity is poor.
Second, PC (polycarbonate) material
Features: (1) an amorphous plastic, no obvious melting point, glass transition temperature of 140 ° ~ 150 ℃, the melting temperature of 215 ℃ ~ 225 ℃, molding temperature 250 ℃ ~ 320 ℃.
(2) the viscosity, is more sensitive to temperature, in the normal processing temperature range and internal stability is good, basic does not decompose, 300 ℃ long stay when more than 340 ℃ starts to break down, is influenced by shear rate viscosity is smaller.
(3) water imbibition is strong
Three, PMMA (organic glass)
Features: (1) the glass transition temperature of 105 ℃, melting temperature is greater than 160 ℃, the decomposition temperature of 270 ℃, forming temperature range is very wide.
(2) the viscosity, liquidity is poor, good thermal stability.
3. Strong water imbibition.
Four, PA (nylon)
Features: (1) crystalline plastics, sort is more, different species, its melting point is different also, and the melting temperature range is narrow and general used PA66 its melting point is 260 ℃ ~ 265 ℃.
(2) low viscosity, good fluidity, have obvious melting point, thermal stability is poor.
(3) water imbibition.
Five, PET (polyester)
Features: (1) melting point 250 ℃ ~ 260 ℃, blow molding grade PET molding temperature is a little wide, approximately 255 ℃ ~ 290 ℃.
(2) blow molding grade PET high viscosity, temperature has great effects on viscosity and poor heat stability.

Posted by Vicky

Click here contact me:sinomould-06
Pubdate 2013-06-28 19:55

After the plastics injection molding, plastic parts out from the mold cavity, either using single or multiple pieces of ejection mechanism, the ejection is generally a one-time job. But sometimes because of the special shape plastic parts or the need of production automation, after completion of work in a mold release, still can't take out from the mold plastic parts or can't fall off automatically, while you must add a stripper to make plastic parts fall off. Demoulding difficult mainly because of gate or plastic squeeze within the mould. 

The reason:

1.Equipment: top output was not enough.

2.mold

(1) the demoulding structure is unreasonable or improper position.

(2) draft was not enough.

(3) the mold temperature is too high or bad ventilation.

(4) the sprue wall or cavity surface is rough.

(5) nozzle and mould inlet does not break or inlet diameter of the nozzle diameter.

3. technological aspects

(1) the barrel temperature is too high or injection quantity too much.

(2) the injection pressure is too high or the pressure maintaining and cooling time is long.

4 aspects: raw material lack of lubricant.

Posted by Vicky

Click here contact me:sinomould-06
Pubdate 2013-06-28 19:45

Steel heat teatment is one of the key technology in mould manufacturing, heat treatment is directly related to the manufacturing precision of mould, mechanical properties, service life, and the manufacturing cost, is to ensure that an important part of the mould quality and service life. In the mold design and manufacturing process, if can correctly use steel, choose reasonable heat treatment and surface strengthening technology, to give full play to the potential of the material performance, reduce energy consumption, reduce cost, improve the mould quality and service life will play a major role.
For heat treatment of steel, all want to control the direction and degree of deformation, but because of the chemical composition and heat treatment technology, quality, geometric shape, design will change the direction and degree of deformation of plastic mold, thus affecting the final size of the mould, so, only by optimizing the heat treatment process to minimize the mold deformation degree.
(1) the deformation caused by residual stress endured strict grinding steel, bending and cutting jobs after the stress is very high, so we must eliminate the stress produced by these assignments and, in the heat treatment deformation happens.
(2) in the process of heat treatment heating fast deformation caused by heat treatment heating speed should be slow enough, so that all parts of the mold temperature is basically consistent.
During fast heating, thin cross section than the thick section expands quickly, it will generate stress in the joint of mold, if the stress is greater than the yield strength of steel, makes the mold deformation. In addition, in the process of quick heating, when thin section first reaches a critical temperature, and began to shrink and thick section is still in the expansion, which will cause deformation.
During the slow heating, synthetic stress below the yield strength moulds, so will not happen deformation. And when quick heating, synthetic stress is greater than the yield strength, so the mould will produce deformation, when the resultant stress exceeds the rupture strength of steel, will lead to mold broken.
In heat treatment, surface mould parts processing oxidation and decarburization and increase carbon effect, will bring serious impact mold service life. Using vacuum as a ideal heating medium, vacuum heat treatment furnace. Die steel has excellent surface state after vacuum heat treatment, the surface oxidation and decarburization, quenching deformation is small. After vacuum quenching, the fracture toughness of steel, die life by 40% ~ 400% higher than that of conventional technique, is even higher.

Posted by Vicky

Click here contact me:sinomould-06
Pubdate 2013-06-28 13:45

Attractive plastic chair design is more and more catches consumers’ eye in modern life, when investors develop new plastic chair designs, many will consider this factors based on plastic chair practicability. In order to support more and more customers, sino mold not only offer customer with high quality plastic chair mold with best price, but also sino design team offers great effort on innovative plastic chair design to meet customer requirements. In addition, sino mold design team has rich experience on plastic chair design with gas-assisted injection solution, PC transparency chair design and manufacturing.

Sino mold is leading manufacturer in plastic chair mold line, every month we will help our customer newly develop more than 10 sets mold with different plastic chair design. If you are now considering developing mold for your custom plastic chair design, or lack ideas for plastic chair design, pls do not hesitate to contact me, we can offer you with 100% satisfied solution.
Ms Diana
Skype: sino.group01
Pubdate 2013-06-28 13:27

With huge demand of drinking water in the market, more and more investors want to start with mineral water bottle production line in their business lines. For whole mineral water bottle production lines, it needs two steps. First step is the mineral water preform molds and related mineral water bottle preform molding machines. The way to make of preform molds first is to make sure of high quality mineral bottle when blow performs. The second step is to make mineral bottles from mineral water preform molds by blowing process. this requires mineral water blowing mould and blow machine to make.

Sino Holdings Group can offer the whole production line for mineral water bottle making. Sino-pk offers multi cavity preform molds with hot runner system. and Dakumar machinery offers special injection molding machines for PET preform molds manufacturing. We can offer the turnkey projects for mineral water bottle production line. if you are interested, pls feel free to contact with us.
Ms Diana
Skype: sino.group01
Pubdate 2013-06-27 17:26

One of the most common methods of converting plastics from the raw material form to an article of use is the process of injection molding. This process is most typically used of use for thermoplastic materials which may be successively melted, reshaped and cooled. Injection molded components are a feature of almost every functional manufactured article in the modern word, from automotive products through to food packaging,. This versatile process allows us to produce high quality, simple or complex components on a fully automated basis at high speed with materials that we changed the face of manufacturing technology over the last 50 years or so.


To understand the engineering and operation of modern day injection molding machines, it is useful to first look at the not too distant origins of the process. The first injection molding machines were based around pressure die casting technology used for metals processing, with patents registered in the USA in the 1870’s specially for celluloid processing . Further major industrial developments did not occur until the 1920’s when a series of hand operated machines were produced in Germany to process thermoplastic materials. A simple lever arrangement was used to clamp a two piece mold together. Molten plastics was then injected into the mold to produce the molded component.
 

Posted by Julia

Service1@cnmould.com

 

Pubdate 2013-06-27 17:16

Plastic is a commercial name for a group of materials that while being processed. Can be pushed or formed into almost any desired shape and then retain that shape. Plastics material can be cast, molded, or pressed into and unlimited variety of shapes. They are one of the most used materials on a volume basis in industrial and commercial life. Plastics are on par with metals,wood,and ceramics and are essential to the needs of virtually the entire spectrum of business. Plastics, properly applied, will perform functions at a cost that other materials cannot match.

Undoubtedly, the single most important characteristic of plastic materials, as a general family, is their versatility. Most plastic are synthetic materials polymers. These high molecular weight polymers are classified as being eigher thermoplastic or thermosetting, depending on the specific material chemistry.

Most of the plastic materials that are used in the injection molding process are described as thermoplastics. Thermoplastics are linear or branched polymeric materials that soften when heated, and resolidiry when cooled. Thermoplastic materials are available in a variety of types and grades having properties that range from rigid to elastomeric. In theory, the processing of thermople plastic materials involves only physical changeds therefor the materials involves only physical changeds.
 

Posted by Julia

Service1@cnmould.com

Pubdate 2013-06-27 11:18

What is on IML? Do you know on IML strengths? This paper will simply introduce on IML, on IML in the application and the advantages of manufacturers use on IML.
On IML refers to a mould labeling. Is printed polypropylene film, thickness is commonly tenths of millimeters, with direct injection molding steps together on products. The most prominent feature is its structure, hardening of the surface layer is a thin film, the middle layer is printed label design, the last layer is plastic. Because the ink was printed in the middle layer, so the surface of the product is still in good condition, will not be defiled, and middle color can keep for a long time will not fade.
On IML advantage has the following several aspects:
1. The three-dimensional molding process can increase the product outward appearance modelling design degrees of freedom;
2. High brightness, high surface hardness of the film covering product, scratch-resistant flowers, wear resistance;
3. The printing design and color design can change at will, without changing the mold, producing all kinds of different style, beautifully printed products;
4. The pattern of a printing ink layer sandwiched between the transparent film and the resin, no oxidation, no wear and tear, long colourful;
5. Buttons flexible, feel is good, according to the normal use, more than 500000 times is not broken;
6. Windows area (no printing area) has high transparency (light transmittance up to 92%);
7. Product composite forming surface achieve seamless waterproof effect, combines functional and decorative in one.
On IML application: on IML is now widely used in communication products, household appliances mould, medical mould < http://www.sino-mould.cn/medical-mould.html > and above such as car dashboard. Because on IML these advantages, making the application on IML is rapid promotion and largely replaced the traditional decoration, product labeling.
On IML in the domestic market is steadily rising. Sino Holdings group < http://www.sino-mould.cn/ > as a professional mould on IML manufacturers, its leading position in domestic on IML labeling. If you have this aspect of the business needs, please contact us.

 Posted by Vicky

Click here contact me:sinomould-06

 

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