Medical plastic product injection molding device

Abstract

The invention discloses a medical plastic product injection molding device, and relates to the technical field of injection molding machines, the medical plastic product injection molding device comprises a mounting table, an injection molding unit, an anti-blocking unit and a cleaning unit, the mounting table is used for mounting and fixing the injection molding unit, the anti-blocking unit and the cleaning unit, the injection molding unit is used for melt extrusion molding, the anti-blocking unit is used for solving melt accumulation at an injection molding nozzle, and the cleaning unit is used for cleaning the injection molding nozzle. The cleaning unit is used for removing the influence of defective holes and the like of products due to the fact that non-uniformly-heated melt is attached to the surface of a mold in the mold forming process, and in the injection molding process of the medical plastic products, when the situation that materials are accumulated and caked at an injection molding nozzle is detected in the injection molding process of the injection molding unit, the cleaning unit is used for cleaning the injection molding nozzle. The anti-blocking unit is used for cleaning caked materials, and meanwhile, the cleaning unit is used for cleaning granular attachments which enter the surface of the mold along with normal materials, so that the product quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machines, in particular to an injection molding device for medical plastic products. Background Art

[0002] In the field of injection molding production of medical plastic products, the performance of the injection molding device is closely related to the product quality. However, the current injection molding devices for medical plastic products face many technical challenges, among which the problems of material accumulation and agglomeration at the injection nozzle and granular adhesion on the mold surface due to uneven material heating are particularly prominent, which seriously restricts the development of the industry and the improvement of product quality.

[0003] The injection nozzle is the key channel for materials to enter the mold cavity from the barrel in the injection molding device. Its normal operation plays a decisive role in the stability of the entire injection molding process and the quality of the product. In the injection molding process of medical plastic products, due to the combined influence of various factors, material accumulation and agglomeration are very likely to occur at the injection nozzle. The accumulation and agglomeration of materials at the injection nozzle will bring a series of serious consequences. First, it will cause the injection nozzle to be blocked, so that the material cannot enter the mold cavity smoothly, directly causing the injection molding process to be interrupted and reducing production efficiency. Secondly, the agglomerated material may be forcibly extruded during the subsequent injection molding process, mixed into the normal material flow and enter the mold cavity, thereby forming defects such as inclusions and holes inside the medical plastic products, seriously affecting the quality and performance of the products. The granular adhesion of materials on the mold surface will have many adverse effects on medical plastic products. In terms of appearance, these granular adhesions will make the product surface rough and uneven, seriously affecting the aesthetics of the product.

[0004] In addition, particle adhesion will increase the difficulty and frequency of mold cleaning and reduce the service life of the mold. After each injection molding cycle, it takes extra time and manpower to clean the mold to remove the granular materials on the surface, which not only increases production costs, but also frequent cleaning operations may damage the mold surface, further shortening the service life of the mold. Summary of the invention

[0005] The purpose of the present invention is to provide a medical plastic product injection molding device to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The medical plastic product injection molding device comprises a mounting platform, an injection molding unit, an anti-blocking unit and a cleaning unit, wherein the mounting platform is placed on a horizontal basis, the injection molding unit is fixedly mounted on an end of the mounting platform away from the horizontal basis, the anti-blocking unit is rotatably connected to the injection molding unit, the anti-blocking unit has a function of cleaning agglomerated materials, the anti-blocking unit is fixedly connected to the cleaning unit, the cleaning unit is fixedly mounted on the surface of an end of the mounting platform away from the horizontal basis, and the cleaning unit has a function of cleaning the injection molding unit.

[0008] The mounting table is used to install and fix the injection molding unit, the anti-blocking unit and the cleaning unit. The injection molding unit is used for extrusion molding of molten material. The anti-blocking unit is used to solve the accumulation of molten material at the injection molding nozzle. The cleaning unit is used to remove the molten material attached to the mold surface during the mold molding process due to uneven heating, causing defects and holes in the product. During the injection molding process of medical plastic products, when the injection molding unit is performing injection molding, if accumulation and agglomeration of materials are detected at the injection molding nozzle, the agglomerated materials are cleaned up by the anti-blocking unit, and the granular attachments that have entered the mold surface with normal materials are removed by the cleaning unit, thereby improving product quality.

[0009] Furthermore, the injection unit includes a motor, a barrel, a hopper, a screw, a support rod, a mold 1, a mold 2 and an injection nozzle. The fixed end of the motor is fixedly mounted on the surface of one end of the mounting platform away from the horizontal foundation, the output end of the motor passes through the barrel and is fixedly connected to the screw, the barrel is fixedly mounted on the surface of one end of the mounting platform away from the horizontal foundation through the support rod, the hopper is fixedly mounted on the side of the barrel away from the mounting platform, the hopper is conductively connected to the barrel through a conduit, the screw is rotatably mounted inside the barrel, the mold 1 is conductively connected to one end of the injection nozzle away from the motor, the mold 2 is slidably mounted on the surface of one end of the mounting platform away from the horizontal foundation, the injection nozzle is fixedly connected to one end of the barrel away from the motor, and the barrel is rotatably connected to the anti-blocking unit.

[0010] When the material enters the barrel from the hopper, the external controller controls the motor to start, thereby driving the screw to rotate. Under the push of the screw, the material is evenly heated and stirred while flowing from the injection nozzle to mold one. The controller controls mold two to approach mold one, so that the material is shaped in the mold cavity, and mold two moves forward, so that the molding mold falls into the collection barrel.

[0011] Furthermore, the anti-blocking unit includes a gear ring, a pinion, an inner and outer gear ring, a spring telescopic rod, a conductive block, a fixed ring plate, a bevel gear and a telescopic scraper. The gear ring is rotatably connected to the barrel, the pinion is slidably mounted on the outer surface of the end of the screw away from the motor, the inner and outer gear rings are rotatably mounted on the outer surface of the barrel, one end of the spring telescopic rod is fixedly connected to the pinion, and the other end is fixedly connected to the conductive block, the conductive block is slidably mounted on a hole opened in the fixed ring plate, the fixed ring plate is fixedly mounted on the outer surface of the screw, the bevel gear is fixedly connected to the cleaning unit, the gear ring is connected to the inner and outer gear rings through the bevel gear, and the fixed end of the telescopic scraper is fixedly mounted on the gear ring.

[0012] Furthermore, the anti-blocking unit also includes a telescopic spring, a first electrode plate, a second electrode plate, an elastic spiral belt, a sealing cover, a pressure plate, a heating rod and a buffer spring. The telescopic end of the telescopic scraper is fixedly connected to the sealing cover, and the telescopic scraper is connected to the pressure plate through the telescopic spring. The first electrode plate is fixedly installed on the surface of the pressure plate close to one end of the telescopic scraper, and the second electrode plate is fixedly installed on the side of the telescopic scraper close to the pressure plate. One end of the elastic spiral belt is fixedly connected to the sealing cover, and the other end is slidably connected to the screw rod through a sliding rod. The heating rod is rotatably installed on the telescopic scraper, one end of the buffer spring is fixedly connected to the telescopic scraper, and the other end is fixedly connected to the heating rod, and the heating rod is electrically connected to the second electrode plate.

[0013] When the staff finds that there is material accumulation or material agglomeration at the injection nozzle, current is passed through the external controller to the gear ring, so that the gear ring shows polarity. On the one hand, it pushes the small gear to move and compress the spring telescopic rod. At the same time, the conductive block contacts the inside of the fixed ring plate hole under the action of the spring telescopic rod. At this time, the small gear meshes with the inner teeth of the inner and outer toothed rings, thereby driving the small gear and the inner and outer toothed rings to rotate under the rotation of the screw, thereby driving the gear ring to rotate under the driving action of the bevel gear. On the other hand, the polarity of the gear ring pushes the blocking cover to move to the right to block the injection nozzle to prevent unevenly heated materials from continuing to enter the mold through the injection nozzle. The blocking cover moves to the right to stretch the elastic spiral belt while The telescopic scraper is pulled to extend, and at the same time, the elastic spiral belt is pushed to push the heating rod stretching buffer spring to rotate, thereby driving the telescopic scraper to rotate under the action of the rotation of the gear ring, scraping the material accumulated on the inner wall of the injection nozzle and mixing it with the normal material, thereby avoiding the injection nozzle from being blocked by material accumulation for a long time. When the telescopic scraper rotates, the pressure plate contacts the agglomerated material to squeeze the telescopic spring, thereby driving the first electrode plate and the second electrode plate to contact each other under the push of the material. At this time, the current of the controller passes through the first electrode plate and the second electrode plate and flows into the heating rod, causing the heating rod to heat up and fully stir and heat the agglomerated material and the normal material, thereby improving the mixing uniformity of the materials and thus improving the product quality.

[0014] Furthermore, the cleaning unit includes a rotating rod, a special-shaped wheel, a fixed plate, a mounting frame, a push rod, a slider, a push rod, a tension spring and a cleaning block, one end of the rotating rod is fixedly connected to the bevel gear, and the other end is fixedly connected to the fixed plate, the special-shaped wheel is fixedly mounted on the rotating rod, the fixed plate is fixedly mounted on the surface of one end of the mounting platform away from the horizontal foundation, the mounting frame is fixedly mounted on the fixed plate, the push rod is slidably mounted on the mounting frame, the end of the push rod away from the special-shaped wheel is connected to the fixed plate through a tension spring, the slider is fixedly mounted in the middle of the push rod, the slider is slidably mounted in a slot opened on the push rod, the push rod is slidably mounted on the mounting frame, and the end of the push rod away from the mounting frame is fixedly connected to the cleaning block.

[0015] When the bevel gear rotates, the special-shaped wheel starts to rotate under the transmission action of the rotating rod. When the special-shaped wheel contacts the push rod, it pushes the push rod to move to the right to compress the tension spring. When the special-shaped wheel does not contact the push rod, the push rod moves to the left under the action of the restoring force of the tension spring itself. During the left and right movement of the push rod, the slider is driven to move in the slot in the push rod, and relative movement is generated with the push rod, so that the left and right movement of the slider is converted into the forward and backward movement of the push rod. During the forward and backward movement of the mounting frame, the push rod drives the cleaning block to move synchronously, thereby cleaning the granular impurities attached to the surfaces of the mold one and the mold two, thereby avoiding the influence of the granular impurities on the appearance defects of the product and improving the product quality.

[0016] Furthermore, the injection nozzle is made of transparent material.

[0017] In order to facilitate the staff to observe whether there is accumulation and agglomeration of materials at the injection nozzle, and to avoid agglomeration, the unevenly heated materials are forced to mix directly with the normal materials and enter the mold for cooling and molding, which may lead to problems such as defective holes in the product and cause product quality problems.

[0018] Furthermore, the gear ring is made of an electromagnet, the pinion is made of a magnet, and the sealing cover is made of a magnet.

[0019] In order to facilitate the discovery of the agglomeration problem of the material at the injection nozzle caused by uneven heating, the gear ring of the electromagnet receives the current with the opposite polarity to the pinion and the blocking cover, thereby pushing the pinion and the blocking cover away from the electromagnet, and cooperating with other structures of the anti-blocking unit to remove the agglomerated materials and mix them evenly with normal materials, and then the injection molding machine works again. At the same time, the granular materials attached to the mold surface are removed by the cleaning unit to avoid affecting the subsequent product quality.

[0020] Furthermore, the diameter of the elastic spiral belt gradually increases from one end of the sealing cover to one end of the gear ring, and the rotation direction of the screw rod is opposite to that of the elastic spiral belt.

[0021] First, the elastic ribbon with gradually increasing diameter can cover a larger spatial range when rotating, and produce a stronger stirring effect on the agglomerated material at the injection nozzle, which can effectively break the agglomeration state of the agglomerated material and make it dispersed more evenly. Secondly, as the diameter of the elastic ribbon increases, its pushing and squeezing effect on the material is gradually enhanced, which helps to overcome the viscosity and resistance of the material at the injection nozzle. The rotation direction of the elastic ribbon is opposite to that of the screw, which makes it easier for the material to flow to the screw under the action of thrust, thereby promoting the mixing of the agglomerated material and other normal materials, thereby improving the overall mixing effect and preventing the material from agglomerating and clogging at the injection nozzle again.

[0022] Furthermore, the pinion gear is not meshed with the inner teeth of the inner and outer toothed rings in an initial state.

[0023] In order to avoid the pinion gear from meshing with the inner and outer toothed rings in the initial state, which would cause the normal material transportation to be blocked and affect the work efficiency.

[0024] Furthermore, the special-shaped wheel is composed of a disc and a plurality of long rods.

[0025] In order to make the push rod move by contacting the push rod multiple times through the special-shaped wheel, the slider and the push rod can produce relative movement, thereby driving the cleaning block to scrape off the granular impurities attached to the inner surface of the mold cavity, so as to avoid defects in the mold during molding and affect the appearance quality of the product.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention passes current into the gear ring through the controller, presenting polarity, on the one hand, pushing the pinion to move and mesh with the inner teeth of the inner and outer gear rings, thereby driving the pinion and the inner and outer gear rings to rotate under the rotation of the screw, thereby driving the gear ring to rotate under the driving action of the bevel gear, and on the other hand, the gear ring presents polarity to push the blocking cover to move rightward to block the injection nozzle, and at the same time stretch the elastic spiral belt and the telescopic scraper to extend, and under the push of the elastic spiral belt, the heating rod stretching buffer spring is pushed to rotate, thereby driving the telescopic scraper to rotate under the action of the rotation of the gear ring, scraping the material accumulated on the inner wall of the injection nozzle and mixing it with the normal material, thereby avoiding the situation that the injection nozzle is blocked by the accumulation of materials for a long time, when the telescopic scraper rotates, the pressure plate contacts the agglomerated material and pushes the first electrode plate and the second electrode plate to contact each other, at this time, the current of the controller passes through the first electrode plate and the second electrode plate into the heating rod, so that the heating rod heats up to fully stir and heat the agglomerated material and the normal material, improves the mixing uniformity of the materials, and thus improves the product quality.

[0028] 2. In the process of contact and separation between the special-shaped wheel and the push rod, the present invention pushes the push rod to move left and right, driving the slider to move in the slot in the push rod, generating relative movement with the push rod, thereby converting the left and right movement of the slider into the forward and backward movement of the push rod, and at the same time driving the cleaning block to move forward and backward synchronously, to clean the granular impurities attached to the surfaces of mold one and mold two, thereby avoiding the influence of the granular impurities on the appearance defects of the product and improving the product quality.

[0029] 3. The elastic spiral ribbon of the present invention, with its diameter gradually increasing, covers a larger spatial range and produces a stronger stirring effect when rotating, thereby breaking up the agglomerated state of the agglomerated material and dispersing it more evenly. As the diameter of the elastic spiral ribbon increases, the pushing and squeezing of the material is increased, so that the material overcomes the viscosity and resistance at the injection molding nozzle. The rotation direction of the elastic spiral ribbon is opposite to that of the screw, so that the material can flow toward the screw more easily under the action of thrust, thereby promoting the mixing of the agglomerated material and other normal materials, thereby improving the overall mixing effect and preventing the material from agglomerating and clogging again at the injection molding nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall appearance structure of a medical plastic product injection molding device of the present invention;

[0031] Figure 2 It is a schematic diagram of the top view structure of a medical plastic product injection molding device of the present invention;

[0032] Figure 3 A medical plastic product injection molding device according to the present invention Figure 2 Schematic diagram of the cross-section structure at AA in the middle;

[0033] Figure 4 A medical plastic product injection molding device according to the present invention Figure 2 The structural schematic diagram of the partial enlarged view at B in the middle;

[0034] Figure 5 This is a schematic diagram of the internal structure of a barrel of a medical plastic product injection molding device of the present invention;

[0035] Figure 6 A medical plastic product injection molding device according to the present invention Figure 5 The structural schematic diagram of the partial enlarged view at C in the middle;

[0036] Figure 7 This is a schematic diagram of the internal structure of an injection nozzle of a medical plastic product injection molding device of the present invention;

[0037] Figure 8 This is a schematic diagram of the installation position structure of a part of the anti-blocking unit of a medical plastic product injection molding device of the present invention;

[0038] Fig. 9 This is a schematic diagram of the appearance structure of a cleaning unit of a medical plastic product injection molding device of the present invention;

[0039] Fig.10 A medical plastic product injection molding device according to the present invention Fig. 9 Schematic diagram of the structure of the partial enlarged view at point D in the middle.

[0040] In the figure: 1. mounting table; 2. injection unit; 21. motor; 22. barrel; 23. hopper; 24. screw; 25. support rod; 26. mold one; 27. mold two; 28. injection nozzle; 3. anti-blocking unit; 31. gear ring; 32. pinion; 33. inner and outer gear ring; 34. spring telescopic rod; 35. conductive block; 36. fixed ring plate; 37. bevel gear; 38. telescopic scraper; 39. telescopic spring; 310. first electrode plate; 311. second electrode plate; 312. elastic spiral belt; 313. blocking cover; 314. pressure plate; 315. heating rod; 316. buffer spring; 4. cleaning unit; 41. rotating rod; 42. special-shaped wheel; 43. fixed plate; 44. mounting frame; 45. push rod; 46. slider; 47. ejector rod; 48. tension spring; 49. cleaning block. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Example: Figure 1-Figure 10 As shown, the present invention provides a technical solution:

[0043] like Figure 1 , 2 As shown, a medical plastic product injection molding device includes a mounting platform 1, an injection molding unit 2, an anti-blocking unit 3 and a cleaning unit 4. The mounting platform 1 is placed on a horizontal basis, the injection molding unit 2 is fixedly mounted on one end of the mounting platform 1 away from the horizontal basis, the anti-blocking unit 3 is rotatably connected to the injection molding unit 2, the anti-blocking unit 3 has the function of cleaning agglomerated materials, the anti-blocking unit 3 is fixedly connected to the cleaning unit 4, the cleaning unit 4 is fixedly mounted on the surface of one end of the mounting platform 1 away from the horizontal basis, and the cleaning unit 4 has the function of cleaning the injection molding unit 2.

[0044] The mounting table 1 is used to install and fix the injection molding unit 2, the anti-blocking unit 3 and the cleaning unit 4. The injection molding unit 2 is used for extrusion molding of the molten material. The anti-blocking unit 3 is used to solve the accumulation of the molten material at the injection nozzle 28. The cleaning unit 4 is used to remove the molten material attached to the mold surface during the mold molding process due to uneven heating, causing defects and holes in the product. During the injection molding process of medical plastic products, when the injection molding unit 2 is performing injection molding, if it is detected that there is accumulation and agglomeration of materials at the injection nozzle 28, the agglomerated materials are cleaned up by the anti-blocking unit 3, and at the same time, the granular attachments that have entered the mold surface with normal materials are removed by the cleaning unit 4, thereby improving product quality.

[0045] like Figure 1 , 2 As shown in Figures 3 and 5, the injection unit 2 includes a motor 21, a barrel 22, a hopper 23, a screw 24, a support rod 25, a mold 1 26, a mold 27 and an injection nozzle 28. The fixed end of the motor 21 is fixedly mounted on the surface of the end of the mounting platform 1 away from the horizontal foundation, the output end of the motor 21 passes through the barrel 22 and is fixedly connected with the screw 24, the barrel 22 is fixedly mounted on the surface of the end of the mounting platform 1 away from the horizontal foundation through the support rod 25, the hopper 23 is fixedly mounted on the side of the barrel 22 away from the mounting platform 1, the hopper 23 is conductively connected with the barrel 22 through a conduit, the screw 24 is rotatably mounted inside the barrel 22, the mold 1 26 is conductively connected with the injection nozzle 28 away from the motor 21, the mold 27 is slidably mounted on the surface of the end of the mounting platform 1 away from the horizontal foundation, the injection nozzle 28 is fixedly connected with the end of the barrel 22 away from the motor 21, and the barrel 22 is rotatably connected to the anti-blocking unit 3.

[0046] When the material enters the barrel 22 from the hopper 23, the external controller controls the motor 21 to start, thereby driving the screw 24 to rotate. Under the push of the screw 24, the material is evenly heated and stirred while flowing from the injection nozzle 28 to the mold 1 26. The controller controls the mold 2 27 to approach the mold 1 26. After the material is shaped in the mold cavity, the mold 2 27 moves forward, so that the molding mold falls into the collection barrel.

[0047] like Figure 4 , 6As shown in , 7 and 8, the anti-blocking unit 3 includes a gear ring 31, a pinion 32, an inner and outer gear ring 33, a spring telescopic rod 34, a conductive block 35, a fixed ring plate 36, a bevel gear 37 and a telescopic scraper 38. The gear ring 31 is rotatably connected to the barrel 22, the pinion 32 is slidably mounted on the outer surface of the end of the screw 24 away from the motor 21, the inner and outer gear rings 33 are rotatably mounted on the outer surface of the barrel 22, one end of the spring telescopic rod 34 is fixedly connected to the pinion 32, and the other end is fixedly connected to the conductive block 35, the conductive block 35 is slidably mounted on the hole opened on the fixed ring plate 36, the fixed ring plate 36 is fixedly mounted on the outer surface of the screw 24, the bevel gear 37 is fixedly connected to the cleaning unit 4, the gear ring 31 is connected to the inner and outer gear rings 33 through the bevel gear 37, and the fixed end of the telescopic scraper 38 is fixedly mounted on the gear ring 31.

[0048] like Figure 6 , 7 As shown, the anti-blocking unit 3 also includes a telescopic spring 39, a first electrode plate 310, a second electrode plate 311, an elastic spiral belt 312, a blocking cover 313, a pressure plate 314, a heating rod 315 and a buffer spring 316. The telescopic end of the telescopic scraper 38 is fixedly connected to the blocking cover 313, and the telescopic scraper 38 is connected to the pressure plate 314 through the telescopic spring 39. The first electrode plate 310 is fixedly installed on the surface of the pressure plate 314 close to one end of the telescopic scraper 38, and the second electrode plate 311 is fixedly installed on the side of the telescopic scraper 38 close to the pressure plate 314. One end of the elastic spiral belt 312 is fixedly connected to the blocking cover 313, and the other end is slidably connected to the screw 24 through a sliding rod. The heating rod 315 is rotatably installed on the telescopic scraper 38. One end of the buffer spring 316 is fixedly connected to the telescopic scraper 38, and the other end is fixedly connected to the heating rod 315. The heating rod 315 is electrically connected to the second electrode plate 311.

[0049] When the staff finds that there is material accumulation or material agglomeration at the injection nozzle 28, current is passed through the external controller to the gear ring 31, so that the gear ring 31 shows polarity. On the one hand, it pushes the small gear 32 to move and compress the spring telescopic rod 34. At the same time, under the action of the spring telescopic rod 34, the conductive block 35 contacts the inside of the hole of the fixed ring plate 36. At this time, the small gear 32 is meshed with the inner teeth of the inner and outer toothed rings 33, thereby driving the small gear 32 and the inner and outer toothed rings 33 to rotate under the rotation of the screw 24, thereby driving the gear ring 31 to rotate under the driving action of the bevel gear 37. On the other hand, the gear ring 31 shows polarity and pushes the blocking cover 313 to move right to block the injection nozzle 28 to prevent unevenly heated materials from continuing to enter the mold 26 through the injection nozzle 28. At the same time, the blocking cover 313 moves to the right to stretch the elastic spiral belt 312 When the retractable scraper 38 is extended, the elastic spiral belt 312 pushes the heating rod 315 to stretch the buffer spring 316 to rotate, thereby driving the retractable scraper 38 to rotate under the action of the rotation of the gear ring 31, and scraping the material accumulated on the inner wall of the injection nozzle 28 to mix it with the normal material, thereby avoiding the injection nozzle 28 from being blocked by the accumulation of materials for a long time. When the retractable scraper 38 rotates, the pressure plate 314 contacts the agglomerated material to squeeze the retractable spring 39, thereby driving the first electrode plate 310 and the second electrode plate 311 to contact each other under the push of the material. At this time, the current of the controller passes through the first electrode plate 310 and the second electrode plate 311 and flows into the heating rod 315, so that the heating rod 315 generates heat to fully stir and heat the agglomerated material and the normal material, thereby improving the mixing uniformity of the materials and thus improving the product quality.

[0050] like Fig. 9 , 10 As shown, the cleaning unit 4 includes a rotating rod 41, a shaped wheel 42, a fixed plate 43, a mounting frame 44, a push rod 45, a slider 46, a push rod 47, a tension spring 48 and a cleaning block 49. One end of the rotating rod 41 is fixedly connected to the bevel gear 37, and the other end is fixedly connected to the fixed plate 43. The shaped wheel 42 is fixedly mounted on the rotating rod 41, the fixed plate 43 is fixedly mounted on the surface of one end of the mounting platform 1 away from the horizontal foundation, the mounting frame 44 is fixedly mounted on the fixed plate 43, the push rod 45 is slidably mounted on the mounting frame 44, and the end of the push rod 45 away from the shaped wheel 42 is connected to the fixed plate 43 through the tension spring 48, the slider 46 is fixedly mounted in the middle of the push rod 45, the slider 46 is slidably mounted on the notch opened on the push rod 47, the push rod 47 is slidably mounted on the mounting frame 44, and the end of the push rod 47 away from the mounting frame 44 is fixedly connected to the cleaning block 49.

[0051] When the bevel gear 37 rotates, under the transmission action of the rotating rod 41, the shaped wheel 42 starts to rotate. When the shaped wheel contacts the push rod 45, the push rod 45 is pushed to move to the right to compress the tension spring 48. When the shaped wheel 42 is not in contact with the push rod 45, under the action of the restoring force of the tension spring 48 itself, the push rod 45 moves to the left. During the left and right movement of the push rod 45, the slider 46 is driven to move in the groove of the push rod 47, and relative movement is generated with the push rod 47, so that the left and right movement of the slider 46 is converted into the forward and backward movement of the push rod 47. During the forward and backward movement of the mounting frame 44, the push rod 47 drives the cleaning block 49 to move synchronously, thereby cleaning the granular impurities attached to the surfaces of the mold 1 26 and the mold 2 27, thereby avoiding the appearance defects of the product caused by the granular impurities and improving the product quality.

[0052] like Figure 1 As shown, the injection nozzle 28 is made of a transparent material.

[0053] In order to facilitate the staff to observe whether there is accumulation and agglomeration of materials at the injection nozzle 28, and to avoid agglomeration, the unevenly heated materials are forced to mix directly with the normal materials and enter the mold for cooling and molding, which may cause problems such as defective holes in the product and cause product quality problems.

[0054] like Figure 7 As shown, the gear ring 31 is made of an electromagnet, the pinion 32 is made of a magnet, and the blocking cover 313 is made of a magnet.

[0055] In order to facilitate the discovery of the agglomeration problem of the material at the injection nozzle 28 caused by uneven heating, the gear ring 31 made of the electromagnet material receives current with a polarity opposite to that of the pinion 32 and the blocking cover 313, thereby pushing the pinion 32 and the blocking cover 313 away from the electromagnet, and the agglomerated materials are removed and evenly mixed with normal materials through the other structures of the anti-blocking unit 3, and then the injection molding machine works again. At the same time, the granular materials attached to the mold surface are removed through the cleaning unit 4 to avoid affecting the subsequent product quality.

[0056] like Figure 6 As shown, the diameter of the elastic spiral band 312 gradually increases from one end of the blocking cover 313 to one end of the gear ring 31 , and the rotation direction of the screw rod 24 is opposite to that of the elastic spiral band 312 .

[0057] First, the elastic spiral belt 312 with a gradually increasing diameter can cover a larger spatial range when rotating, and produce a stronger stirring effect on the agglomerated material at the injection nozzle 28, which can effectively break the agglomeration state of the agglomerated material and make it dispersed more evenly. Secondly, as the diameter of the elastic spiral belt 312 increases, its pushing and squeezing effect on the material is gradually enhanced, which helps to overcome the viscosity and resistance of the material at the injection nozzle 28. The rotation direction of the elastic spiral belt 312 is opposite to that of the screw 24, so that the material can flow toward the screw 24 more easily under the action of thrust, thereby promoting the mixing between the agglomerated material and other normal materials, thereby improving the overall mixing effect, and preventing the material from agglomerating and clogging again at the injection nozzle 28.

[0058] like Figure 6 As shown, the pinion 32 is not meshed with the inner teeth of the inner and outer toothed ring 33 in the initial state.

[0059] In order to avoid the pinion 32 from meshing with the inner and outer toothed rings 33 in the initial state, which would cause the normal material transportation to be blocked and affect the work efficiency.

[0060] like Fig. 9 As shown, the special-shaped wheel 42 is composed of a disc and a plurality of long rods.

[0061] In order to make the push rod 45 move by contacting the special-shaped wheel 42 with the push rod 45 multiple times, the slider 46 and the push rod 47 can be moved relative to each other, thereby driving the cleaning block 49 to scrape off the granular impurities attached to the inner surface of the mold cavity to avoid defects in the mold during molding and affect the appearance quality of the product.

[0062] Working principle of the present invention:

[0063] When the material enters the barrel 22 from the hopper 23, the external controller controls the motor 21 to start, thereby driving the screw 24 to rotate. Under the push of the screw 24, the material is evenly heated and stirred while flowing from the injection nozzle 28 to the mold 1 26. The controller controls the mold 2 27 to approach the mold 1 26. After the material is shaped in the mold cavity, the mold 2 27 moves forward, so that the molding mold falls into the collection barrel.

[0064] When the staff finds that there is material accumulation or material agglomeration at the injection nozzle 28, current is passed through the external controller to the gear ring 31, so that the gear ring 31 shows polarity. On the one hand, it pushes the small gear 32 to move and compress the spring telescopic rod 34. At the same time, under the action of the spring telescopic rod 34, the conductive block 35 contacts the inside of the hole of the fixed ring plate 36. At this time, the small gear 32 is meshed with the inner teeth of the inner and outer toothed rings 33, thereby driving the small gear 32 and the inner and outer toothed rings 33 to rotate under the rotation of the screw 24, thereby driving the gear ring 31 to rotate under the driving action of the bevel gear 37. On the other hand, the gear ring 31 shows polarity and pushes the blocking cover 313 to move right to block the injection nozzle 28 to prevent unevenly heated materials from continuing to enter the mold 26 through the injection nozzle 28. At the same time, the blocking cover 313 moves to the right to stretch the elastic spiral belt 312 When the retractable scraper 38 is extended, the elastic spiral belt 312 pushes the heating rod 315 to stretch the buffer spring 316 to rotate, thereby driving the retractable scraper 38 to rotate under the action of the rotation of the gear ring 31, and scraping the material accumulated on the inner wall of the injection nozzle 28 to mix it with the normal material, thereby avoiding the injection nozzle 28 from being blocked by the accumulation of materials for a long time. When the retractable scraper 38 rotates, the pressure plate 314 contacts the agglomerated material to squeeze the retractable spring 39, thereby driving the first electrode plate 310 and the second electrode plate 311 to contact each other under the push of the material. At this time, the current of the controller passes through the first electrode plate 310 and the second electrode plate 311 and flows into the heating rod 315, so that the heating rod 315 generates heat to fully stir and heat the agglomerated material and the normal material, thereby improving the mixing uniformity of the materials and thus improving the product quality.

[0065] When the bevel gear 37 rotates, under the transmission action of the rotating rod 41, the shaped wheel 42 starts to rotate. When the shaped wheel contacts the push rod 45, the push rod 45 is pushed to move to the right to compress the tension spring 48. When the shaped wheel 42 is not in contact with the push rod 45, under the action of the restoring force of the tension spring 48 itself, the push rod 45 moves to the left. During the left and right movement of the push rod 45, the slider 46 is driven to move in the groove of the push rod 47, and relative movement is generated with the push rod 47, so that the left and right movement of the slider 46 is converted into the forward and backward movement of the push rod 47. During the forward and backward movement of the mounting frame 44, the push rod 47 drives the cleaning block 49 to move synchronously, thereby cleaning the granular impurities attached to the surfaces of the mold 1 26 and the mold 2 27, thereby avoiding the appearance defects of the product caused by the granular impurities and improving the product quality.

[0066] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A medical plastic product injection molding device, characterized in that: The medical plastic product injection molding device comprises a mounting platform (1), an injection molding unit (2), an anti-blocking unit (3) and a cleaning unit (4); the mounting platform (1) is placed on a horizontal foundation; the injection molding unit (2) is fixedly mounted on an end of the mounting platform (1) away from the horizontal foundation; the anti-blocking unit (3) is rotatably connected to the injection molding unit (2); the anti-blocking unit (3) has the function of cleaning agglomerated materials; the anti-blocking unit (3) is fixedly connected to the cleaning unit (4); the cleaning unit (4) is fixedly mounted on a surface of an end of the mounting platform (1) away from the horizontal foundation; and the cleaning unit (4) has the function of cleaning the injection molding unit (2).

2. The medical plastic product injection molding device according to claim 1, characterized in that: The injection molding unit (2) comprises a motor (21), a barrel (22), a hopper (23), a screw (24), a support rod (25), a mold 1 (26), a mold 2 (27) and an injection molding nozzle (28); the fixed end of the motor (21) is fixedly mounted on the surface of one end of the mounting platform (1) away from the horizontal foundation; the output end of the motor (21) passes through the barrel (22) and is fixedly connected to the screw (24); the barrel (22) is fixedly mounted on the surface of one end of the mounting platform (1) away from the horizontal foundation via the support rod (25); the hopper (23) The hopper (23) is fixedly mounted on a side of the barrel (22) away from the mounting platform (1); the hopper (23) is conductively connected to the barrel (22) via a conduit; the screw (24) is rotatably mounted inside the barrel (22); the mold 1 (26) is conductively connected to an end of the injection nozzle (28) away from the motor (21); the mold 2 (27) is slidably mounted on a surface of an end of the mounting platform (1) away from the horizontal base; the injection nozzle (28) is fixedly connected to an end of the barrel (22) away from the motor (21); and the barrel (22) is rotatably connected to the anti-blocking unit (3).

3. The medical plastic product injection molding device according to claim 2, characterized in that: The anti-blocking unit (3) comprises a gear ring (31), a pinion (32), an inner and outer gear ring (33), a spring telescopic rod (34), a conductive block (35), a fixed ring plate (36), a bevel gear (37) and a telescopic scraper (38); the gear ring (31) is rotatably connected to the barrel (22); the pinion (32) is slidably mounted on the outer surface of one end of the screw (24) away from the motor (21); the inner and outer gear ring (33) is rotatably mounted on the outer surface of the barrel (22); the spring telescopic rod One end of the gear (34) is fixedly connected to the pinion (32), and the other end is fixedly connected to the conductive block (35). The conductive block (35) is slidably mounted in a hole opened on the fixed ring plate (36). The fixed ring plate (36) is fixedly mounted on the outer surface of the screw (24). The bevel gear (37) is fixedly connected to the cleaning unit (4). The gear ring (31) is connected to the inner and outer gear rings (33) via the bevel gear (37). The fixed end of the telescopic scraper (38) is fixedly mounted on the gear ring (31).

4. The medical plastic product injection molding device according to claim 3, characterized in that: The anti-blocking unit (3) further comprises a telescopic spring (39), a first electrode plate (310), a second electrode plate (311), an elastic spiral belt (312), a blocking cover (313), a pressure plate (314), a heating rod (315) and a buffer spring (316); the telescopic end of the telescopic scraper (38) is fixedly connected to the blocking cover (313); the telescopic scraper (38) is connected to the pressure plate (314) via the telescopic spring (39); the first electrode plate (310) is fixedly mounted on the pressure plate (314) near the telescopic scraper (38); On one end surface, the second electrode plate (311) is fixedly mounted on the telescopic scraper (38) near the pressure plate (314), one end of the elastic spiral belt (312) is fixedly connected to the blocking cover (313), and the other end is slidably connected to the screw rod (24) through a sliding rod, the heating rod (315) is rotatably mounted on the telescopic scraper (38), one end of the buffer spring (316) is fixedly connected to the telescopic scraper (38), and the other end is fixedly connected to the heating rod (315), and the heating rod (315) is electrically connected to the second electrode plate (311).

5. The medical plastic product injection molding device according to claim 2, characterized in that: The cleaning unit (4) comprises a rotating rod (41), a shaped wheel (42), a fixing plate (43), a mounting frame (44), a push rod (45), a slider (46), a push rod (47), a tension spring (48) and a cleaning block (49); one end of the rotating rod (41) is fixedly connected to the bevel gear (37), and the other end is fixedly connected to the fixing plate (43); the shaped wheel (42) is fixedly mounted on the rotating rod (41); the fixing plate (43) is fixedly mounted on the surface of one end of the mounting platform (1) away from the horizontal foundation; the mounting frame (4 4) is fixedly mounted on a fixed plate (43), the push rod (45) is slidably mounted on a mounting frame (44), the end of the push rod (45) away from the special-shaped wheel (42) is connected to the fixed plate (43) through a tension spring (48), the slider (46) is fixedly mounted on the middle part of the push rod (45), the slider (46) is slidably mounted on a notch provided on a push rod (47), the push rod (47) is slidably mounted on the mounting frame (44), and the end of the push rod (47) away from the mounting frame (44) is fixedly connected to a cleaning block (49).

6. The medical plastic product injection molding device according to claim 2, characterized in that: The injection nozzle (28) is made of transparent material.

7. The medical plastic product injection molding device according to claim 3, characterized in that: The gear ring (31) is made of an electromagnet, the pinion (32) is made of a magnet, and the blocking cover (313) is made of a magnet.

8. The medical plastic product injection molding device according to claim 4, characterized in that: The diameter of the elastic spiral band (312) gradually increases from one end of the blocking cover (313) to one end of the gear ring (31), and the rotation direction of the screw rod (24) is opposite to that of the elastic spiral band (312).

9. The medical plastic product injection molding device according to claim 3, characterized in that: The pinion (32) and the inner teeth of the inner and outer toothed ring (33) are not meshed in an initial state.

10. The medical plastic product injection molding device according to claim 5, characterized in that: The special-shaped wheel (42) is composed of a disc and a plurality of long rods.

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