Insulin needleless syringes (also known as insulin needleless injection systems) are devices that are injected by pressure. Its principle is to generate strong power through the release of the spring in the syringe, quickly push the medicinal solution in the ampoule at the front of the syringe, and the medicinal solution passes through the epidermal cells in the form of a "liquid needle" through the microhole with a diameter of 0.17mm at the front of the ampoule , Penetrate into the subcutaneous tissue and complete the injection. It has the advantage of eliminating the fear of the needle and the pain.


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Intravenous infusion through a disposable infusion set is an indispensable important method and means in clinical treatment. The research results show that a large part of the clinical harm caused by infusion is caused by insoluble particles. The filter membrane of the disposable infusion set can only filter particles larger than 5 microns in diameter, and particles equal to and smaller than the micron diameter. The disposable infusion set cannot filter, so it can filter infusions with 5 microns and smaller particles. The needs of the device came into being.



The main types and generation processes of particles are:
1. Plastic particles, adsorbate in the infusion bag during the production process;
2. Rubber particles are generated when the insertion needle punctures the rubber stopper;
3. Fibres, fluff, and dust particles are generated during contact with the indoor environment during bag opening and puncture; 4. Carbon black particles, particles present in some pharmaceutical preparations;
5. Insoluble colloidal particles are produced during the production of Chinese herbal medicine preparations due to the limitation of the purification process;
6. Crystal particles, which are generated when the storage conditions of the drug are changed and the storage time is increased; 7. Glass particles are particles that are scattered when the ampoule is cut;
8. Drug microparticles. When drugs are added, they are generated due to incomplete dissolution of some powders, physical and chemical interactions between drugs, changes in solvents, and changes in pH.


The main clinical hazards caused by particles are as follows.

1, allergic reactions. Drug crystal particles, polymers, degradation products and other foreign substances contained in the drug can react with tissue proteins at the injection site or in the veins of the vein, causing an allergic reaction.

2, phlebitis. After entering the human body, the particles cause irritation and damage to the inner wall of the blood vessel with blood circulation, change the normal state of the blood vessel wall, cause platelet adhesion, and cause phlebitis.

3, vascular embolism. Insoluble particles cause blockages in small blood vessels in the brain, lungs, kidneys, liver, eyes, etc., causing different degrees of tissue necrosis and damage.

4, block microcirculation. Capillary diameter in adults is 6 to 8 microns, and in infants only 3 microns. Microparticles with a diameter larger than the diameter of capillaries in the medicinal solution can block capillaries and form microcirculation disorders.

5, arteriosclerosis. Particles can cause non-inflammatory lesions in the arteries, thicken and harden the arterial wall, lose elasticity, and narrow the lumen.

6. Pyrogen reaction. Symptoms such as chills and high fever caused by infusion are called pyrogen reactions.

7. Granuloma. When particles invade into the capillaries of the lung, brain, kidney and other tissues, they will cause macrophages to proliferate and form granulomas, which will cause insufficient blood supply to the brain, lungs, kidneys and eyes, and cause circulation disorders.

8, pulmonary embolism. When the blood reaches the lungs through circulation, the capillary bed of the lungs acts as a filter, leaving a part of the particles to stick to the blood vessel wall, which easily forms pulmonary embolism and granulomas.

Yuhuan Shengjiu Mould Co., Ltd. is a professional China manufacturer and supplier of high-quality Medical Mould . The main production and supply: syringe molds, safety needle molds, oxygen mask molds, needle-free injection nozzles, medical molds such as diffuser molds. For more medical mold product information and information, please visit us: https://www.medicalmould.net

A syringe core rod forming mold includes a fixed mold component and a movable mold component. A component molding surface is set between an upper mold of the fixed mold component and a lower mold of the movable mold component, and a plurality of core rod cavities are provided on the parting surface. It is characterized in that at least one set of positioning components is also provided at the parting surface of the upper mold and the lower mold. The positioning component includes a bevel positioning pin and a bevel positioning sleeve which are fitted with each other. The bevel positioning pin and the bevel positioning sleeve are respectively connected with the fixed mold. The component and the movable mold component are fixed by fasteners. Upper, lower, left, and right sides of the upper and lower molds are provided with insert fixing seats, and upper and lower sides of the upper and lower molds are provided with compression blocks that cooperate with the slopes of the insert fixing seats. After the above structure is adopted: Positioning components are set at the parting surfaces of the upper and lower molds to prevent the core rod cavity arranged on both sides from being moved and fixed, and the upper, lower, left, and right sides of the upper and lower molds are set. There is a fixed block of inserts, which cooperates with the pressing block to align the upper mold and the lower mold, and the injection molded core rod is in a good position.

The core rod structure for a pull-back type safety self-destructing syringe includes a rod body, and a rubber plug limit fitting part is formed near the end of the rod body, and a rubber plug is sleeved at the rubber plug limit fitting part, which is characterized in that: The end of the rod body is provided with an asymmetric elastic locking pull-back piece, one side of the asymmetric elastic locking pull-back piece forms a 1-178 degree angle A with the symmetrical center line of the rod body, and the other side of the asymmetric elastic locking pull-back piece and The symmetrical center line of the rod body forms an included angle B of 1 degree to 178 degrees. The asymmetric elastic pullback lock of the product is a plastic barb body. The plastic barb body adopts the design principle of the asymmetry and the elastic body structure. The specific angle and size design make the barb body have an elastic buffering and locking function. The product is easy to use and operate, and the working state is stable. The asymmetrical elastic pull-back piece at the end of the core rod and the inner cavity of the needle seat have an excellent locking effect. The overall structure of the product is reasonable, the concept is clever, and it is easy to promote and apply.


Yuhuan Shengjiu Mould Co., Ltd. specializes in manufacturing and supplying high-quality Syringe Mould in China. Is China's outstanding medical mold manufacturers and suppliers. For product details and information, please visit: https://www.medicalmould.net

The point gate structure of an injection mold which is convenient to be pulled off from the root of the point gate during injection molding includes a point gate sleeve provided in the mold, and the point gate in the point gate sleeve communicates with the cavity of the mold. The gate is a full-tapered tapered hole. The point gate of this product is a full-tapered tapered hole with the same taper from beginning to end. When injection molding, the point gate is easy to break from the root, which greatly improves the accuracy of the product. In addition, this tapered hole can be used It is processed after perforation and wire cutting.

The point gate structure of an injection mold, which is convenient to pull off from the root of the point gate during injection molding, includes: a point gate sleeve provided in the mold, and the point gate in the point gate sleeve communicates with the cavity of the mold. The point gate is a full-tapered tapered hole. The point gate of this product is a full-tapered tapered hole with the same taper from beginning to end. When injection molding, the point gate is easy to break from the root, which greatly improves the accuracy of the product. In addition, this tapered hole can be used It is processed after perforation and wire cutting.

As we all know, wire cutting can greatly improve the finish and accuracy of point gates, shorten the processing time, and improve the processing efficiency. Take the machining of molds for plastic magnetic rotors of indoor and outdoor machines of inverter air conditioners as an example. It only takes about 1 hour.

The injection mold includes an upper mold, a lower mold, and a core. The upper mold is connected to the lower mold through a guide pin. An injection nozzle is provided on the upper mold, and a heating device is provided on the upper mold and the lower mold. The heating device is provided by The hot oil circulation flow channel, oil inlet and oil outlet on the mold body are composed; the upper surface of the upper mold is a flow channel plate, and the lower surface of the flow channel plate has several flow channels, which are installed between the upper mold and the lower mold. There is a middle mold lifting frame, and a huff plate is installed in the middle mold lifting frame; a plurality of cores are evenly installed on the haffle plate, and a core insert is inserted in the center of each core. It is cylindrical, and longitudinal inlays are provided on both sides of the core insert, and the inlay on one side of the core insert is provided with an inclined notch. The product adopts the oblique cooperation of the middle mold insert and the core insert to prevent deformation of the insert, which effectively prevents the insert from colliding when the mold is closed and improves the service life of the mold.



Shengjiu Mould specializes in producing Syringe Mould in China. China's outstanding medical mold manufacturers and suppliers. Learn more about consulting: https://www.medicalmould.net

Simple Mask (SFM) is a basic disposable mask made of transparent plastic that provides oxygen treatment for patients with chest pain (possible heart disease), dizziness, and minor bleeding. The mask is only suitable for patients who are able to breathe on their own but may require a higher oxygen concentration than the 21% oxygen concentration in the surrounding air. Patients who are unable to breathe by themselves switch to a medical ventilator. For FiO2 with an oxygen content of 40-60%, a simple mask can provide a higher flow rate (6-10 liters per minute) than a nasal catheter. Nasal cannula and simple mask are described as a low flow delivery system.

Unlike non-respirator and partial rebreather masks, simple masks do not have storage bags. It also has holes in the mask, instead of the non-respiratory check valve, so ambient air can enter the mask. This feature eliminates the risk of suffocation if the mask with check valve is disconnected from oxygen. Therefore, simple masks are often the first choice for basic life support personnel (such as firefighters, lifeguards, and other non-medical rescue personnel) who have been trained in basic first aid.

The final oxygen concentration delivered by a simple mask depends on the amount of room air mixed with the oxygen that the patient is breathing. Air mixing depends on the amount of air everyone is breathing at the moment and the fit of the mask. Due to the variability of these factors, the final oxygen concentration is somewhat uncontrolled. A venturi device attached to the mask can be used to control the concentration of oxygen delivered to some extent. Generally, it is used to prevent hypoxia in patients with emphysema who have lost their ability to fully inhale. Although more clinically useful data can be obtained by extracting arterial blood gas, the effectiveness of treatment can be continuously monitored using pulse oximetry.

Yuhuan Shengjiu Mould Co , Ltd . is a professional manufacturer of disposable medical device moulds. Professionally supply customers with high-quality Oxygen Mask Mould . For oxygen mask mold product information, please visit: https://www.medicalmould.net/