Auteur : kristamedicalmould


Today we will talk about the classification and usage of blood collection needle mould.

1. Split type

The split lancet is a disposable lancet that is commonly used clinically. It basically replaces the syringe blood sampling method used in the last century, and is often used in conjunction with a disposable blood collection tube.

The structure is that a blood collection needle is connected to the needle seat at the end of the tube of the intravenous infusion needle. When in use, the blood collection needle needs to be rotated and fixed to the front end of the needle holder outer cylinder, and the vein puncture is carried out with the hand held to puncture the vein. After successful, the vacuum blood collection tube is inserted into the rear cavity of the needle holder, so that the blood collection needle blade passes through The blood stopper is pierced into the rubber plug of the vacuum tube, and the blood is sucked into the blood collection tube under the action of negative pressure. If necessary, repeat this procedure to achieve multi-tube blood collection; after blood collection is completed, the venipuncture needle is pulled out to stop bleeding locally, the blood collection needle is removed from the needle holder, and the venipuncture needle is discarded in the waste box.

Features: After the lancet is launched, the needle core will be locked, so that the lancet can only be used once, which can ensure the safety of the user; the design of the push-type launcher provides the user with the easiest operation; high-quality, ultra-sharp The three-sided needle design can quickly pierce the skin and reduce the pain of the patient; the needle models and piercing depths of various specifications are suitable for most blood collection needs.

2. Pen-type blood sampling needle

Pen-type blood sampling needles are not used much in clinical practice. The structure is a penetrating needle tube with sharp cutting edges at both ends. The middle and lower section of the needle tube is fixed on the needle seat. The front end is called a venipuncture needle, and the back end is called a blood collection needle. The blood collection needle has a blood blocking sleeve and a needle tube on the surface. There is a protective sleeve at the end. In clinical practice, blood collection is usually used in conjunction with needle holders and disposable blood collection tubes.

When in use, the blood collection needle is rotated and fixed to the front end of the outer cylinder of the needle holder to perform venipuncture. After successful, insert the vacuum blood collection tube into the cavity at the rear end of the needle holder, so that the rear edge of the blood collection needle passes through the blood stop sleeve and penetrates The rubber plug of the vacuum tube is pierced, and the blood is drawn into the blood collection tube under the action of negative pressure. Such repetition can realize the collection of multiple blood samples.

3. Arterial blood sampling needle

Arterial blood sampling is of great significance for judging and treating hypoxemia. Arterial blood sampling is the basis for accurately judging hypoxemia.

Features: The arterial blood gas syringe strictly fixes the needle to prevent the risk of loosening the needle during the whole process of collecting arterial blood samples. The high molecular density of the blood sampling syringe wall and the double-sealed needle plug effectively prevent the blood gas sample from gas exchange with the outside world. Before blood sampling, the amount of blood collected can be preset according to the needs of the test, so that the arterial puncture operation is safe and simple, and the waste of blood samples is avoided. The hole stone at the back of the syringe is designed to form a unique automatic exhaust device, which can quickly and safely exhaust the residual gas in the syringe under the action of arterial pressure, and avoid the interference of dead space gas on the arterial blood gas detection results.

For more information about medical mould products, please visit our official website to understand:


What problems are prone to syringe moulds?

1. Fracture of the syringe mould

Due to improper temperature control, the forging mould material itself has cracked. In this case, the only way to change the template is to change the template. Cracks and even broken templates in production are often caused by excessive heat treatment hardness and excessive stress of the selected materials. Cracking is easy to occur during welding. In severe cases, especially during welding, hard materials are easy to crack. The template stress is too large and the impact cracks are mostly at the sharp corners of the cavity. If it can still be used, it can be perforated and cut in an I-shaped mosaic, or it can be hugged around the template.

2. Wear of syringe mould:

In particular, thermosetting plastic moulds and aluminum alloy injection moulds are severely worn. Insufficient hardness of the movable parts in the injection mould, sharp corners, improper material selection, etc. are also causes of wear. For highly corrosive products and plastics with considerable hardness and fillers, the surface of the materials we choose should be corrosion resistant and have high surface hardness.

3. Poor heat dissipation of the syringe mould

The heat dissipation of the long core mould is very important, and the selection of appropriate materials has a big gap between the appearance of the product and the output of the product. For example, beryllium copper and other materials containing beryllium and cobalt are selected, after heat treatment, they have higher strength, hardness, fatigue resistance, wear resistance and good heat transfer.

4. In the production process of syringe moulds and products, mould materials often have various defects and deformations

One of the reasons for material deformation is that in order to reduce costs, the actual mould material used is not a special mould steel. The template has insufficient rigidity, insufficient thickness, improper heat treatment, residual stress, and EDM stress. The above reasons often interact and increase The amount of deformation. In addition to the corresponding solution during processing, widen the mould foot or use the afterburner at each point in the middle of the mould to withstand it. Some moulds are not very demanding, and can be heated and deformed at a high temperature instantly at the focus position, which is quite effective. People often grind off the edge of the template to reduce the contact surface. It is necessary to minimize the grinding depth to facilitate the effective life of the mould. It is difficult to correct the deviation of the angular dimension of the cavity after the template is deformed. The too tight core causes the cavity to be deformed by the wall. This phenomenon is particularly serious when there are multiple cavities. If you barely use it, the flash in the middle of the template will not change of medical mould.


Yuhuan Shengjiu Mould is a professional manufacturer and supplier of medical mould. Today we will talk about: What is a syringe mould?

Syringe barrel mould, including fixed side take-up plate, movable side take-off plate, positioning ring and sprue sleeve, characterized in that there is a circulating cooling water channel on the fixed side cavity plate, which can be used on the fixed side cavity plate The movable-side mould-opening tie rod bolts are threadedly connected with the movable-side mould-opening tie rods, and the movable-side mould-opening tie rods are movably installed in the holes of the movable side push plate, and the movable-side limit tie rod bolts are used on the movable side take-off plate The movable side limit pull rod is threadedly connected, and the movable side limit pull rod movably passes through the hole of the movable side push plate.

In the production of syringes and barrels, the mould structure is simple, the circulating water is cooled evenly, the moulding cycle is short, and the production efficiency is high.

The barrel structure of a disposable syringe includes a hollow barrel. The proximal end of the hollow barrel is provided with an annular groove matching the upper limit step of the push rod on the inner wall of the hollow barrel. The convex ring constitutes the groove wall, and the height of the back convex ring is greater than the front convex ring by 0.25mm~0.35mm.

Through the height difference between the front and back convex rings, this product makes the push rod not easy to be pulled out without damaging the hollow cylinder after use, ensuring the safety of the “one-time” use of the syringe and helping to prevent cross-infection.

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As a professional manufacturer of medical moulds, Shengjiu will talk about the advantages and disadvantages of oxygen inhalation with mask and nasal catheter.

Mask oxygen method: Cover the patient with a mask to inhale oxygen through the nose.

Nasal cannula oxygen inhalation method: The nasal cannula method is to insert a catheter into the top of the nasal cavity to inhale oxygen.

Advantages and disadvantages of mask oxygen:


1. No irritation, used for patients with mouth breathing.

2. It can provide a relatively constant inhaled oxygen concentration.

3. Changes in breathing pattern will not change the inhaled oxygen concentration.

4. Humidifying oxygen.

5. High-velocity gas can promote the exhalation of carbon dioxide in the mask, and there is basically no repeated inhalation of carbon dioxide.

6. Little irritation to nasal mucosa.


1. Cause inconvenience to eating and drinking.

2. The patient has a sense of restraint and occlusion.

3. May cause respiratory acidosis.

The advantages and disadvantages of nasal cannula oxygen:


1. It is simple, inexpensive, convenient and comfortable.

2. It does not affect eating and drinking.


1. The inhaled oxygen concentration is affected by the inhaled tidal volume and flow rate, and the ratio of breathing time.

2. The nasal duct is easily blocked.

3. It is irritating to the local area and can cause dryness in sputum.

4. Intolerance.

For more product details, please click here: oxygen mask mould.


Because the curled part of the Oxygen Mask Mould is in direct contact with the pilot’s facial skin, it is required to be comfortable, free of allergic reactions and special odors. From the perspective of the oxygen masks currently in service and under development in the United Kingdom, the United States, France and other countries, they all use soft silicone rubber materials that are resistant to aging, oxidation and ozone, and have no abnormal odor (for example, Sauer A hardness of 30-40 degrees silicone rubber ), it has sufficient elasticity and certain rigidity to maintain the shape of the cover.

Since the connecting part of the mask and the device needs to be guaranteed to have sufficient rigidity and strength, different strength, rigidity, and flexibility requirements are put forward for different parts of the oxygen mask to meet different usage requirements.

Since the bottom of the oxygen mask needs to be in contact with the human face, the edges of the products produced cannot fit well with the user’s face, and the edges of the products produced due to moulds and other reasons are not flat enough to ensure the contact with people For comfort, a rubber strip that fits the face is usually buckled on the mask. However, the rubber strips are generally assembled manually, which not only has low production efficiency but also greatly wastes labor. This kind of manual assembly can neither guarantee product hygiene nor guarantee The fit of the product.

Yuhuan Shengjiu Mould Co.,Ltd is the leader in disposable Medical Mould industry. If necessary, please call us.


Vaginal Speculum Mould suppositories are solid preparations that are made into a certain shape of suppositories with medical suppository molds for administration in the human cavity. It is used to treat patients with gynecological vaginitis, trichomonal vaginitis and non-specific vaginitis with antibacterial and insecticidal effects.

The preparation method of gynecological suppository is very simple

1. After cleaning the medical suppository mold, spray some release agent on the surface of the mold, and then tighten the fastening nut on the mold.

2. Pour the liquid medicine, after the liquid medicine cools, use a blade to scrape the surface of the medical suppository mold, remove the excess liquid medicine, make the medical suppository mold face down, loosen the upper mold with a nut, and then turn it over to make the medical suppository mold The nut is up.

3. Loosen the bolts, separate the two mold pieces, and eject the Needleless Injection Site suppository medicine.


Vaginal Speculum Mould technology is a technology dependent on medical instruments and equipment, with accuracy and precision. In clinical practice, the surgical cavity is stripped through a small incision, and the endoscope lens and various instruments are inserted to complete a series of surgical operations, such as: incision, stripping, electrocoagulation, washing, suture, repair, etc., are all monitored by the naked eye. The operation is performed under the screen, instead of the traditional operation under direct vision of the surgical field. At present, endoscopic displays have been widely used in various inspections and microsurgery.

The endoscopic camera system takes laparoscopic surgery equipment as an example. The laparoscopic unit usually includes an endoscopic display, a camera host, a camera, a cold light source, an optical cable, an insufflator, and a high-frequency electrosurgical unit.

Advantages of vaginal speculum mould application:

1. The surgical incision is short, scars are less, and cutaneous nerve injury is less;

2. The operation is performed under direct vision, with clear anatomical levels, which can avoid unnecessary neurovascular damage under blind vision;

3. The operation damage is small, the complications are few, and the postoperative reaction is light;

4. Fast postoperative recovery, short hospital stay and less surgical pain.

Disadvantages of the application of vaginal speculum mould:

1. The operation time is long and the operation cost is high;

2. A lot of investment in machinery and equipment, and a long training period for technical personnel. Although there are still many imperfections in vaginal speculum mould, it has advantages that traditional Three Way Stopcock methods cannot match.


1. The cavity and core are three-dimensional. The external and internal shapes of Laboratory Plastic Ware Mould are directly formed by the cavity and core. These complex three-dimensional profiles are more difficult to process, especially the blind-hole inner molding surface processing of the cavity. If traditional processing methods are used, not only Workers are required to have a high level of skill, many auxiliary tools and fixtures, many tools, and a long processing cycle.

2. High precision and surface quality requirements, long service life. At present, the dimensional accuracy of general plastic parts is required to be 1T6 to 1T7, and the dimensional accuracy of injection mold parts with surface roughness of Ra0.2-0.1um is required to reach 1T5 to 1T6, and the surface roughness is below Ra0.1um. Long-life injection molds are necessary to improve efficiency and reduce costs. At present, the service life of injection molds generally requires more than 1 million times. Precision injection molds should use a rigid mold base. Increase the thickness of the template. Increase the support column or tapered positioning element to prevent the mold from deforming under pressure. Sometimes the internal pressure can reach 100MPa. The ejection device is an important factor that affects the deformation and dimensional accuracy of the product. Therefore, a suitable ejection point should be selected to make the demolding uniform. Most of the high-precision injection molds are inlaid or fully assembled in structure, which requires the machining accuracy and interchangeability of mold parts to be greatly improved.

3. Long process flow and tight manufacturing time. For injection molded parts, most of them are complete products that are matched with other parts, and in many cases, other parts have been completed, eagerly waiting for the matching of injection molded parts to the market. Because of the high requirements on the shape or dimensional accuracy of the product, and because of the different characteristics of the resin material, after the mold is manufactured, it is necessary to repeatedly try and modify the mold, which makes the development and delivery time very tight.

4. Design and manufacture in different places. Mold manufacturing is not a direct purpose, but the correct product design proposed by the user. The mold manufacturer designs and manufactures the mold according to the user’s requirements, and in most cases, the injection production of the product is also from other manufacturers. This results in a situation where product design, mold design and manufacturing, and product production are carried out in different places.

5. Professional division of labor, dynamic combination. Mold production is small in batches and generally belongs to single-piece production, but molds require a lot of standard parts, ranging from mold bases to small thimbles. These cannot and cannot be completed by one manufacturer alone, and the manufacturing process is complex. Common equipment and CNC Equipment of Syringe Mould usage is extremely uneven.