Injection molding machine and housing for a hemodialysis tube

Abstract

The application relates to an injection molding machine and a hemodialysis tube shell and belongs to the technical field of hemodialysis tube shell production equipment, which comprises a machine body, a first mold and a second mold are arranged on the machine body, the first mold and the second mold are buckled to form a mold cavity for forming the hemodialysis tube shell, the first mold is fixedly arranged on the machine body, the second mold is opposite to the first mold and is slidingly arranged on the machine body, a left mold and a right mold are slidingly arranged on the first mold, and the left mold and the right mold are symmetrically arranged along the first mold; a forming rod is arranged on each of the left mold and the right mold, a plurality of supporting plates are slidingly arranged on the peripheral wall of the forming rod, a supporting groove is formed in the forming rod and used for sliding the supporting plates into the forming rod, and the sliding direction of the supporting plates is perpendicular to the axis direction of the forming rod; the forming rod is rotationally arranged on the corresponding left mold or right mold, and the rotating axis of the forming rod is parallel to the sliding direction of the left mold or right mold. The application has the effect of improving the forming quality.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of dialysis tube shell production equipment, in particular to an injection molding machine and a hemodialysis tube shell BACKGROUND

[0002] In clinical treatment of kidney diseases, a hemodialysis treatment method is generally adopted, blood is drawn from an artery by a blood pump of a dialysis machine, connected to a blood inlet of a dialysis tube shell through a dialysis tube shell, and returned to a patient's body through a cellulose material made hollow fiber membrane and a dialyzer outlet, the hemodialysis tube shell is formed by an injection molding machine.

[0003] At present, a patent application file with the application publication number CN104260282A discloses a forming mold of a hemodialysis device, which comprises a front mold and a rear mold, the front mold and the rear mold are closed to form at least one shape cavity for molding a product, the product is a tubular shape with open ends, at least one small tube is vertically arranged on the product and communicates with a central hole of the product, the mold further comprises at least one first inner mold for forming a central hole of the small tube and a second inner mold for forming a central hole of the product, the second inner mold comprises coaxially arranged left and right inner molds, at least one first guide rail is arranged on the rear mold along the length direction of the second inner mold, the left and right inner molds of a second inner mold are movably arranged on a first guide rail, at least two second guide rails are arranged on the front mold, a slider is arranged on each of the left and right inner molds, and the two sliders are movably arranged on the second guide rails respectively, the second guide rails are free curves extending away from the center line of the rear mold and the front mold, and the mold has the advantages of mechanical core pulling structure, accurate positioning, high efficiency and the like

[0004] According to the related technology in the above, the inventors believe that the following defects exist: after the left and right inner membranes are formed, the left and right inner membranes have a certain adhesion, so that the left and right inner membranes are prone to stretching when demolding, thereby affecting the molding quality. SUMMARY

[0005] In order to improve the molding quality, the application provides an injection molding machine and a hemodialysis tube shell.

[0006] In the first aspect, the application provides an injection molding machine, which adopts the following technical scheme:

[0007] The injection molding machine comprises a machine body, a first mold and a second mold arranged on the machine body, the first mold and the second mold are combined to form a mold cavity for molding a dialysis tube shell, the first mold is fixedly arranged on the machine body, the second mold is opposite to the first mold and is slidingly arranged on the machine body, the second mold slides in the direction towards or away from the first mold, a left mold and a right mold are slidingly arranged on the first mold, the left mold and the right mold are symmetrically arranged along the first mold, the sliding direction of the left mold and the right mold is perpendicular to the symmetric axis of the left mold and the right mold and is towards or away from each other, the injection molding machine further comprises a first driving member for driving the left mold and the right mold to slide; a molding rod is arranged on the left mold and the right mold, the molding rods on the left mold and the right mold are located at the back of the mold cavity and abut against each other to form an injection molding space of the dialysis tube shell, a plurality of receiving plates are slidingly arranged on the peripheral wall of the molding rod, a receiving groove is formed in the molding rod for the receiving plate to slide into the molding rod, the sliding direction of the receiving plate is perpendicular to the axis direction of the molding rod; the molding rod is rotationally arranged on the corresponding left mold or right mold, and the rotation axis of the molding rod is parallel to the sliding direction of the left mold or right mold.

[0008] By adopting the above technical scheme, when the dialysis tube shell is injection molded, the second mold slides towards the first mold and is combined with the first mold, then the first driving member drives the left mold and the right mold to slide towards each other, the left mold and the right mold drive the molding rods to slide during the sliding process, the molding rods slide to abut against each other, then the hot plastic enters the mold cavity, and the plastic is cooled to form on the two molding rods; during demolding, the receiving plate is first slid, the receiving plate slides into the receiving groove, the receiving plate is separated from the inner wall of the dialysis tube shell, then the molding rod is rotated, the molding rod is relatively rotated with the dialysis tube shell, the dialysis tube shell is separated from the molding rod, then the demolding operation is performed, because the molding rod and the dialysis tube shell are in a separated state, the possibility that the molding rod stretches the dialysis tube shell when the molding rod and the dialysis tube shell are separated is reduced, and the molding quality of the dialysis tube shell is improved; after the receiving plate slides into the receiving groove, the bonding area of the molding rod and the dialysis tube shell is reduced, the possibility that the dialysis tube shell is distorted during the rotation process of the molding rod is reduced, and the molding quality of the dialysis tube shell is further improved.

[0009] Optionally, the molding rod comprises a first rod body arranged on the left mold or the right mold and a second rod body arranged on the first rod body, the first rod body and the second rod body are coaxially arranged, the first rod body is rotationally arranged on the corresponding left mold or right mold, the second rod body is rotationally arranged on the first rod body, the rotation axis of the second rod body is parallel to the axis direction of the first rod body, the rotation axes of the first rod body and the second rod body are coaxially arranged, and the rotation directions of the first rod body and the second rod body are opposite, and the receiving plate is arranged on the first rod body and the second rod body.

[0010] By adopting the technical scheme, the first rod body and the second rod body rotate in opposite directions when the forming rod is separated from the dialysis tube shell, the torque directions of the dialysis tube shell adhered to the first rod body and the dialysis tube shell adhered to the second rod body are opposite, the torques cancel each other out in the process of separation, the possibility of the dialysis tube shell being twisted is further reduced, and the forming quality of the dialysis tube shell is improved.

[0011] Optionally, the receiving plate is arc-shaped, has the same curvature as the forming rod, and is flush with the forming rod, and a sealing ring is arranged on the peripheral wall of the receiving plate and abuts against the side wall of the receiving groove.

[0012] By adopting the technical scheme, the receiving plate has the same curvature as the forming rod and is flush with the forming rod, so that the formed dialysis tube shell has a smooth inner wall at the contact position of the receiving plate and the forming rod, the forming quality of the dialysis tube shell is improved, and the dialysis tube shell is separated from the forming rod conveniently; the gap between the receiving plate and the receiving groove is filled under the action of the sealing ring, the possibility of the hot-melt plastic entering the gap is reduced, the forming quality of the dialysis tube shell is further improved, and the dialysis tube shell is separated from the forming rod conveniently.

[0013] Optionally, a micro motor is arranged in each of the left mold and the right mold, the length direction of the output shaft of the micro motor is perpendicular to the length direction of the forming rod, a connecting shaft is coaxially and fixedly arranged on the second rod body, the connecting shaft is coaxially and rotatably arranged in the first rod body and enters the corresponding left mold or right mold, the side of the first rod body away from the second rod body is located in the corresponding left mold or right mold, and the first rod body and the connecting shaft are provided with first bevel gears facing each other at the positions in the corresponding left mold or right mold.

[0014] By adopting the technical scheme, when the first rod body and the second rod body are driven to rotate in opposite directions, the micro motor is started, the micro motor drives the second bevel gear to rotate, the second bevel gear drives the two first bevel gears to rotate, the rotation directions of the two first bevel gears are opposite, and the two first bevel gears drive the first rod body and the connecting shaft to rotate, respectively, and the connecting shaft drives the second rod body to rotate, so as to realize the rotation of the first rod body and the second rod body in opposite directions, and the operation is simple and convenient.

[0015] Optionally, the receiving plate on the first rod body is provided with a first driving rod, the length direction of the first driving rod is perpendicular to the length direction of the connecting shaft, a first gear is arranged on the connecting shaft, and a first rack meshing with the first gear is arranged on the first driving rod.

[0016] By adopting the above technical solution, when the connecting shaft and the first rod body rotate, the connecting shaft and the first rod body rotate in opposite directions, so that the rotation of the connecting shaft drives the first gear to rotate, the rotation of the first gear drives the first tooth to slide, the sliding of the first rack drives the first driving rod to slide, and the first driving rod drives the receiving plate to slide, and the receiving plate slides and separates from the dialysis tube housing, which is simple and convenient to operate; at the same time, the receiving plate is separated from the dialysis tube housing, and the rotation of the forming rod is separated from the dialysis tube housing at the same time, which further facilitates the separation of the dialysis tube housing and the forming rod.

[0017] Optionally, a second drive shaft is rotatably arranged in the connecting shaft, and the second drive shaft is fixedly arranged on the corresponding left mold or right mold. The second drive shaft enters the second rod body at one end away from the corresponding left mold or right mold, and a second drive rod is provided with a receiving plate on the second rod body. A second gear is provided on the second drive shaft, and a second rack is provided on the second drive that meshes with the second gear.

[0018] By adopting the above technical solution, when the second rod body rotates, it rotates relative to the fixed rod, so that the second rack rotates with the fixed rod as the rotation axis, and the second rack and the second gear rotate relative to each other, thereby driving the second rack to slide, thereby driving the receiving plate to slide and separate from the dialysis tube housing, which is simple and convenient to operate; at the same time, the receiving plate is separated from the dialysis tube housing, and the rotation of the forming rod and the separation of the dialysis tube housing are simultaneous, which further facilitates the separation of the dialysis tube housing and the forming rod.

[0019] Optionally, the receiving plates on the first rod body and the second rod body are arranged alternately.

[0020] By adopting the above technical solution, the receiving plates are arranged in a staggered manner. When the receiving plates are separated from the dialysis tube shell, the bonding points between the dialysis tube shell and the forming rod are interrupted, thereby facilitating the rotation of the forming rod and separation from the dialysis tube shell.

[0021] Optionally, a slip ring is fixedly provided on the first rod body or the second rod body, and the slip ring covers the abutting end surfaces of the first rod body and the second rod body. The first rod body and the second rod body are both provided with an accommodating groove for accommodating the slip ring, and the slip ring has the same outer diameter as the first rod body or the second rod body.

[0022] By adopting the above technical solution, under the action of the slip ring, the gap between the first rod body and the second rod body is covered, thereby reducing the possibility of hot-melt plastic entering the above gap and improving the molding quality of the dialysis tube shell; at the same time, it is convenient to separate the molding rod from the dialysis tube shell shell; furthermore, the slip ring has the same outer diameter as the first rod body or the second rod body, which facilitates the formation of a smooth surface on the inner wall of the dialysis tube shell shell.

[0023] Optionally, the first driving member comprises guide rods arranged at four corners of the first mold, the guide rods are arranged in a tilt manner away from the first mold, two guide rods arranged in parallel to the sliding direction of the left mold and the right mold are arranged in a herringbone manner, the second mold is provided with a long strip-shaped gap for the guide rods to pass through, and the left mold and the right mold are each provided with an inclined hole for the guide rods to pass through, the diameter of the inclined hole is equal to the diameter of the guide rod.

[0024] By adopting the technical scheme, when the second mold slides towards the first mold, the second mold drives the guide rods to slide, the guide rods slide in the inclined holes, so that the guide rods drive the left mold and the right mold to slide, and the operation is simple and convenient.

[0025] In a second aspect, the application provides a hemodialysis tube shell, which adopts the following technical scheme:

[0026] Optionally, a hemodialysis tube shell formed by using an injection molding machine comprises a hollow tube body and a hollow branch pipe arranged on the tube body, the length direction of the branch pipe is perpendicular to the length direction of the tube body, and the tube body and the branch pipe are arranged in communication.

[0027] By adopting the technical scheme, during use of the dialysis tube shell, blood enters the dialysis tube shell through one end of the tube body and moves out through the other end of the dialysis tube shell, and dialysis liquid enters through the branch pipe close to the blood outflow end and moves out along the branch pipe close to the blood inflow end, and the operation is simple and convenient.

[0028] In summary, the application has the following beneficial technical effects:

[0029] 1. When the hemodialysis tube shell is injection molded, the second mold slides towards the first mold and is buckled on the first mold, then the first driving member drives the left mold and the right mold to slide towards each other, the left mold and the right mold drive the forming rods to slide during the sliding process, the forming rods slide to abut against each other, then the hot-melt plastic enters the mold cavity, and the plastic is cooled to form on the two forming rods; during demolding, the receiving plate is first slid, the receiving plate slides towards the receiving groove, the receiving plate is separated from the inner wall of the dialysis tube shell after the receiving plate enters the receiving groove, then the forming rods are rotated, the forming rods are relatively rotated with the dialysis tube shell, so that the dialysis tube shell is separated from the forming rods, and then demolding is performed, because the forming rods and the dialysis tube shell are in a separated state, the possibility that the forming rods stretch the dialysis tube shell when the forming rods are separated from the dialysis tube shell is reduced, and the forming quality of the dialysis tube shell is improved.

[0030] 2. After the receiving plate slides into the receiving groove, the bonding area of the forming rods and the dialysis tube shell is reduced, the possibility that the dialysis tube shell is distorted during the rotation of the forming rods is reduced, and the forming quality of the dialysis tube shell is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a whole structure schematic diagram of an injection molding machine according to an embodiment of the present application;

[0032] Figure 2 is a side view of an injection molding machine according to an embodiment of the present application;

[0033] Figure 3 is a sectional view of a left mold of an injection molding machine according to an embodiment of the present application;

[0034] Figure 4 a hemodialysis tube shell according to an embodiment of the present application,

[0035] Reference signs: 1, first mold; 2, second mold; 3, forming groove; 4, left mold; 5, right mold; 6, sliding groove;

[0036] 7, first driving member; 71, guide rod; 72, long strip-shaped notch; 73, inclined hole;

[0037] 8, forming rod; 81, first rod body; 82, second rod body;

[0038] 9, receiving plate; 10, receiving groove; 11, micro motor; 12, connecting shaft; 13, first bevel gear; 14, second bevel gear; 15, first driving rod; 16, first gear; 17, first rack; 18, second driving shaft; 19, second driving rod; 20, second gear; 21, second rack; 22, slip ring; 23, accommodating groove; 24, pipe body; 25, branch pipe. DETAILED DESCRIPTION

[0039] The following will be described in detail below with reference to the accompanying drawings Figures 1-4 Please make further detailed description.

[0040] An injection molding machine is disclosed according to an embodiment of the present application, referring to Figure 1 The injection molding machine comprises a machine body, a first mold 1 and a second mold 2 are arranged on the machine body, a forming groove 3 is arranged on each of the first mold 1 and the second mold 2, the forming groove 3 is attached to the outer wall of the hemodialysis tube shell, the first mold 1 and the second mold 2 are buckled to form a mold cavity for forming the hemodialysis tube shell, the first mold 1 is fixedly arranged on the machine body, the second mold 2 is arranged on the machine body and slides towards or away from the first mold 1;

[0041] Referring to Figure 2 and Figure 3The first mold 1 is provided with a left mold 4 and a right mold 5 which are slidably arranged on the first mold 1, in the embodiment, the first mold 1 is provided with a sliding groove 6 for the left mold 4 and the right mold 5 to slide, the left mold 4 and the right mold 5 are symmetrically arranged along the first mold 1, the sliding direction of the left mold 4 and the right mold 5 is perpendicular to the symmetric axis of the left mold 4 and the right mold 5 and is towards the direction of approaching or deviating from each other, the injection molding machine further comprises a first driving member 7 for driving the left mold 4 and the right mold 5 to slide; the left mold 4 and the right mold 5 are both provided with a forming rod 8, the forming rod 8 is located in the forming groove 3, the forming rods 8 on the left mold 4 and the right mold 5 are located in the rear of the mold cavity and abut against each other to form an injection space of the dialysis tube shell, a plurality of receiving plates 9 are slidably arranged on the peripheral wall of the forming rod 8, the forming rod 8 is provided with a receiving groove 10 for the receiving plate 9 to slide into the forming rod 8, and the sliding direction of the receiving plate 9 is perpendicular to the axis direction of the forming rod 8.

[0042] When the dialysis tube shell is injection molded, first, the first mold 1 and the second mold 2 are buckled to form a mold cavity, then the left mold 4 and the right mold 5 approach and abut against each other, at this time, the injection space for forming the dialysis tube shell is formed between the forming groove 3 and the forming rod 8; then the hot melt material is extruded into the injection space, after the hot melt plastic is formed, the mold is opened, the forming rod 8 is separated from the dialysis tube shell during the demolding process; before the forming rod 8 is separated from the dialysis tube shell, the receiving plate 9 is slid towards the inside of the receiving groove 10, during the sliding process of the receiving plate 9, the receiving plate 9 is separated from the inner wall of the dialysis tube shell, then the forming rod 8 and the dialysis tube shell are separated; after the receiving plate 9 is separated from the dialysis tube shell, the adhesion points between the dialysis tube shell and the forming rod 8 are reduced, thereby reducing the possibility of the forming rod 8 stretching the dialysis tube shell, and improving the forming quality of the dialysis tube shell.

[0043] Referring to Figure 2 and Figure 3 In the embodiment, the receiving plates 9 are uniformly arranged along the circumference of the forming rod 8, further, the forming rod 8 is provided with four receiving plates 9, and the included angle of the receiving plate 9 support is 90°.

[0044] Referring to Figure 2 and Figure 3 In the embodiment, the receiving plate 9 is arc-shaped, has the same curvature as the forming rod 8 and is flush with the forming rod 8, a sealing ring is fixedly arranged on the peripheral wall of the receiving plate 9, the sealing ring abuts against the side wall of the receiving groove 10, and the sealing ring is a high-temperature-resistant sealing ring with deformation ability; under the action of the sealing ring, the gap between the receiving plate 9 and the side wall of the receiving groove 10 is filled, the possibility of the hot melt plastic entering the receiving groove 10 is reduced, thereby improving the forming quality of the dialysis tube shell and facilitating the separation of the forming rod 8 and the dialysis tube shell.

[0045] Referring to Figure 2 and Figure 3In order to further reduce the bonding point of the forming rod 8 and the dialysis tube shell, the forming rod 8 is rotatably arranged on the corresponding left mold 4 or right mold 5, and the rotation axis of the forming rod 8 is parallel to the sliding direction of the left mold 4 or right mold 5; the forming rod 8 rotates in the dialysis tube shell, the bonding point of the forming rod 8 and the dialysis tube shell is separated from each other, and the possibility of stretching of the dialysis tube shell during demolding is further reduced.

[0046] Referring to Figure 2 and Figure 3 , in the embodiment of the present application, in order to reduce the possibility of synchronous rotation of the dialysis tube shell and the forming rod 8, the forming rod 8 comprises a first rod body 81 arranged on the left mold 4 or right mold 5 and a second rod body 82 arranged on the first rod body 81, the first rod body 81 and the second rod body 82 are coaxially arranged, and the first rod body 81 is rotatably arranged on the corresponding left mold 4 or right mold 5;

[0047] Referring to Figure 2 and Figure 3 , the second rod body 82 is rotatably arranged on the first rod body 81, the rotation axis of the second rod body 82 is parallel to the axis direction of the first rod body 81, the rotation axes of the first rod body 81 and the second rod body 82 are coaxially arranged, and the rotation directions of the first rod body 81 and the second rod body 82 are opposite, and the receiving plate 9 is arranged on the first rod body 81 and the second rod body 82.

[0048] Referring to Figure 2 and Figure 3 , the relative and reverse rotation of the first rod body 81 and the second rod body 82 facilitates the separation of the first rod body 81, the second rod body 82 and the dialysis tube shell, and at the same time, the possibility of relative rotation of the dialysis tube shell and the first rod body 81 and the second rod body 82 is reduced. In order to remove the bonding point between the dialysis tube shell and the forming rod 8.

[0049] Referring to Figure 2 and Figure 3 , in the embodiment of the present application, the left mold 4 and the right mold 5 are provided with a micro motor 11, the length direction of the output shaft of the micro motor 11 is perpendicular to the length direction of the forming rod 8 and parallel to the height direction of the machine body, a connecting shaft 12 is coaxially and fixedly arranged on the second rod body 82, the connecting shaft 12 is in a cylindrical shape, the connecting shaft 12 is coaxially rotatably arranged in the first rod body 81 and enters the corresponding left mold 4 or right mold 5, the side of the first rod body 81 away from the second rod body 82 is located in the corresponding left mold 4 or right mold 5, the first rod body 81 and the connecting shaft 12 are provided with opposite first bevel gears 13 at the positions in the corresponding left mold 4 or right mold 5, and a second bevel gear 14 is coaxially arranged on the output shaft of the micro motor 11 and meshes with the two first bevel gears 13.

[0050] When the first rod body 81 and the second rod body 82 are driven to rotate relative to each other, the micro motor 11 is started, the micro motor 11 drives the second bevel gear 14 to rotate, the second bevel gear 14 drives the first bevel gear 13 to rotate, the two first bevel gears 13 drive the first rod body 81 and the connecting shaft 12 to rotate respectively, the connecting shaft 12 drives the second rod body 82 to rotate, and because the rotating directions of the first bevel gear 13 and the second bevel gear 14 are opposite, the rotating directions of the first rod body 81 and the second rod body 82 are opposite.

[0051] With reference to Figure 2 and Figure 3 In the embodiment of the present application, the first driving rod 15 is fixedly arranged on the receiving plate 9 on the first rod body 81, the first driving rod 15 is located on the side of the receiving plate 9 away from the dialysis tube shell, the length direction of the first driving rod 15 is perpendicular to the length direction of the connecting shaft 12, the first gear 16 is fixedly arranged on the connecting shaft 12, and the first rack 17 engaged with the first gear 16 is arranged on the first driving rod 15; when the connecting shaft 12 rotates, the connecting shaft 12 drives the first gear 16 to rotate, the first gear 16 drives the first rack 17 to slide, the first rack 17 drives the first driving rod 15 to slide, and then drives the receiving plate 9 to slide and separate from the dialysis tube shell, so that the operation is simple and convenient.

[0052] With reference to Figure 2 and Figure 3 Further, the second driving shaft 18 is rotatably arranged in the connecting shaft 12, the second driving shaft 18 is coaxially arranged with the connecting shaft 12, the second driving shaft 18 is fixedly arranged in the corresponding left mold 4 or right mold 5, so that the second driving shaft 18 rotates relative to the connecting shaft 12, one end of the second driving shaft 18 away from the corresponding left mold 4 or right mold 5 enters the second rod body 82, the receiving plate 9 on the second rod body 82 is provided with the second driving rod 19, the second gear 20 is arranged on the second driving shaft 18, and the second rack 21 engaged with the second gear 20 is arranged on the second driving rod 19; when the second driving shaft 18 rotates relative to the connecting shaft 12 and the second rod body 82, the second rod body 82 drives the second rack 21 to rotate around the second driving shaft 18 as the rotation axis, so that the second rack 21 relatively slides with the second gear 20 in the relative rotating process, so as to drive the second rack 21 to slide, and drive the receiving plate 9 on the second rod body 82 to slide, so that the operation is simple and convenient.

[0053] With reference to Figure 2 and Figure 3 In order to further facilitate the separation of the formed rod 8 and the dialysis tube shell, the receiving plates 9 on the first rod body 81 and the second rod body 82 are staggered; the receiving plate 9 on the first rod body 81 is located between the adjacent receiving plates 9 on the second rod body 82; the staggered arrangement of the receiving plates 9 breaks the continuity of the bonding points of the formed rod 8 and the dialysis tube shell on the same straight line, thereby facilitating the separation of the formed rod 8 and the dialysis tube shell.

[0054] With reference to Figure 2 And Figure 3 In order to reduce the hot melt plastic into the gap between the first rod body 81 and the second rod body 82, the first rod body 81 or the second rod body 82 is fixedly provided with a sliding ring 22, further, the second rod body 82 or the first rod body 81 is rotationally arranged in the sliding ring 22, the sliding ring 22 covers the abutting end face of the first rod body 81 and the second rod body 82, the first rod body 81 and the second rod body 82 are both provided with a containing groove 23 containing the sliding ring 22, and the sliding ring 22 has the same outer diameter as the first rod body 81 or the second rod body 82; the sliding ring 22 covers the gap between the first rod body 81 and the second rod body 82, thereby reducing the possibility of hot melt plastic entering the gap between the first rod body 81 and the second rod body 82.

[0055] With reference to Figure 2 And Figure 3 In the embodiment of the present application, the first driving member 7 includes guide rods 71 fixedly arranged on four corners of the first mold 1, the guide rods 71 are obliquely arranged towards the direction away from the first mold 1, two guide rods 71 along the sliding direction parallel to the left mold 4 and the right mold 5 are a group and are arranged in a herringbone shape, the second mold 2 is provided with a long strip-shaped notch 72 for the guide rods 71 to pass through, the length direction of the long strip-shaped notch 72 is parallel to the length direction of the normal projection of the guide rods 71 on the second mold 2, the left mold 4 and the right mold 5 are both provided with inclined holes 73 for the guide rods 71 to pass through, and the diameter of the inclined holes 73 is equal to the diameter of the guide rods 71; when the first mold 1 approaches the second mold 2, the guide rods 71 slide along the long strip-shaped notch 72, at the same time, the guide rods 71 slide in the inclined holes 73, because the guide rods 71 are obliquely arranged, thereby driving the left mold 4 and the right mold 5 to slide, which is simple and convenient to operate.

[0056] The implementation principle of the injection molding machine in the embodiment of the present application is as follows:

[0057] After the dialysis tube shell is formed in the mold cavity and before demolding, the micro motor 11 is started, the micro motor 11 drives the second bevel gear 14 to rotate, the rotation of the second bevel gear 14 drives the first bevel gear 13 to rotate, the rotation of the two first bevel gears 13 respectively drives the first rod body 81 and the connecting shaft 12 to rotate, the rotation of the connecting shaft 12 drives the second rod body 82 to rotate, and because the rotation directions of the first bevel gear 13 and the second bevel gear 14 are opposite, the rotation directions of the first rod body 81 and the second rod body 82 are opposite.

[0058] At the same time, in the above process, the rotation of the connecting shaft 12 drives the first gear 16 to rotate, the rotation of the first gear 16 drives the first rack 17 to slide, the sliding of the first rack 17 drives the first driving rod 15 to slide, thereby driving the receiving plate 9 to slide and separate from the dialysis tube shell.

[0059] Meanwhile, when the second driving shaft 18 rotates relative to the connecting shaft 12 and the second rod body 82, the second rod body 82 drives the second rack 21 to rotate relative to the second driving shaft 18 as the rotation axis, so that the second rack 21 slides relative to the second gear 20 during the relative rotation, to drive the second rack 21 to slide, to drive the receiving plate 9 on the second rod body 82 to slide;

[0060] After the receiving plate 9 is separated from the inner wall of the dialysis tube shell, the number of bonding points between the forming rod 8 and the inner wall of the dialysis tube shell is reduced; meanwhile, the first rod body 81 and the second rod body 82 rotate relative to and in opposite directions, so that the bonding points between the first rod body 81 and the second rod body 82 and the dialysis tube shell are separated under the action of the torque, thereby facilitating the separation of the forming rod 8 from the dialysis tube shell during the demolding process, and improving the forming quality of the dialysis tube shell.

[0061] The embodiment of the present application discloses a blood dialysis tube shell formed by injection molding using an injection molding machine, referring to Figure 4 The blood dialysis tube shell comprises a hollow tube body 24 and a hollow branch pipe 25 integrally formed on the tube body 24, both ends of the tube body 24 are provided with openings, the length direction of the branch pipe 25 is perpendicular to the length direction of the tube body 24, and the tube body 24 and the branch pipe 25 are in communication.

[0062] The implementation principle of the blood dialysis tube shell according to the embodiment of the present application is

[0063] During use of the dialysis tube shell, blood enters the dialysis tube shell through one end of the tube body 24 and moves out through the other end of the dialysis tube shell, and dialysis liquid enters through the branch pipe 25 close to the blood outflow end and moves out along the branch pipe 25 close to the blood inflow end.

[0064] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An injection molding machine, comprising a machine body, wherein a first mold (1) and a second mold (2) are provided on the machine body, wherein the first mold (1) and the second mold (2) are fastened together to form a mold cavity for molding a dialysis tube shell, wherein the first mold (1) is fixedly provided on the machine body, and the second mold (2) is opposite to the first mold (1) and is slidably provided on the machine body, and the second mold (2) slides in a direction toward or away from the first mold (1), characterized in that: A left mold (4) and a right mold (5) are slidingly arranged on the first mold (1), and the left mold (4) and the right mold (5) are symmetrically arranged along the first mold (1). The sliding directions of the left mold (4) and the right mold (5) are perpendicular to the symmetry axis of the left mold (4) and the right mold (5), and slide in directions approaching or departing from each other. The injection molding machine also includes a first driving member (7) for driving the left mold (4) and the right mold (5) to slide; a molding rod (8) is provided on each of the left mold (4) and the right mold (5). 5) on the molding rod (8) is located in the mold cavity and abuts against each other to form the injection molding space of the dialysis tube shell, a plurality of receiving plates (9) are slidably arranged on the peripheral wall of the molding rod (8), and a receiving groove (10) for the receiving plates (9) to slide into the molding rod (8) is opened on the molding rod (8), and the sliding direction of the receiving plates (9) is perpendicular to the axial direction of the molding rod (8); the molding rod (8) is rotatably arranged on the corresponding left mold (4) or right mold (5), and the rotation axis of the molding rod (8) is parallel to the sliding direction of the left mold (4) or right mold (5); The forming rod (8) comprises a first rod body (81) arranged on the left mold (4) or the right mold (5) and a second rod body (82) arranged on the first rod body (81); the first rod body (81) and the second rod body (82) are coaxially arranged; the first rod body (81) is rotatably arranged on the corresponding left mold (4) or the right mold (5); the second rod body (82) is rotatably arranged on the first rod body (81); the rotation axis of the second rod body (82) is parallel to the axial direction of the first rod body (81); the rotation axes of the first rod body (81) and the second rod body (82) are coaxially arranged, and the rotation directions of the first rod body (81) and the second rod body (82) are opposite; the receiving plate (9) is arranged on the first rod body (81) and the second rod body (82); A micro motor (11) is provided in both the left mold (4) and the right mold (5), the length direction of the output shaft of the micro motor (11) is perpendicular to the length direction of the forming rod (8), a connecting shaft (12) is coaxially and fixedly provided on the second rod body (82), the connecting shaft (12) is coaxially rotatably provided in the first rod body (81) and enters the corresponding left mold (4) or right mold (5), the side of the first rod body (81) facing away from the second rod body (82) is located in the corresponding left mold (4) or right mold (5), the first rod body (81) and the connecting shaft (12) are located in the corresponding left mold (4) or right mold (5) with first bevel gears (13) facing each other, and a second bevel gear (14) meshing with both first bevel gears (13) is provided on the output shaft of the micro motor (11); The receiving plate (9) on the first rod body (81) is provided with a first driving rod (15), the length direction of the first driving rod (15) is perpendicular to the length direction of the connecting shaft (12), the connecting shaft (12) is provided with a first gear (16), and the first driving rod (15) is provided with a first rack (17) meshing with the first gear (16).

2. The injection molding machine according to claim 1, wherein: The receiving plate (9) is arc-shaped and has the same arc as the forming rod (8) and is flush with the forming rod (8). A sealing ring is provided on the peripheral wall of the receiving plate (9), and the sealing ring abuts against the side wall of the receiving groove (10).

3. The injection molding machine according to claim 1, wherein: A second driving shaft (18) is rotatably arranged in the connecting shaft (12), and the second driving shaft (18) is fixedly arranged on the corresponding left mold (4) or right mold (5). The second driving shaft (18) enters the second rod body (82) at one end away from the corresponding left mold (4) or right mold (5). A second driving rod (19) is arranged on the receiving plate (9) on the second rod body (82), and a second gear (20) is arranged on the second driving shaft (18). The second rack (21) meshing with the second gear (20) is arranged on the second driving shaft.

4. The injection molding machine according to claim 1, characterized in that: The receiving plates (9) on the first rod body (81) and the second rod body (82) are arranged in a staggered manner.

5. The injection molding machine according to claim 1, characterized in that: A slip ring (22) is fixedly provided on the first rod body (81) or the second rod body (82), and the slip ring (22) covers the abutting end surfaces of the first rod body (81) and the second rod body (82). The first rod body (81) and the second rod body (82) are both provided with an accommodating groove (23) for accommodating the slip ring (22), and the slip ring (22) has the same outer diameter as the first rod body (81) or the second rod body (82).

6. The injection molding machine according to claim 1, characterized in that: The first driving member (7) comprises guide rods (71) arranged on the four corners of the first mold (1), the guide rods (71) being inclined in a direction away from the first mold (1), two guide rods (71) being arranged in a herringbone pattern in parallel with the sliding direction of the left mold (4) and the right mold (5), the second mold (2) being provided with a long strip notch (72) for the guide rods (71) to pass through, the left mold (4) and the right mold (5) both being provided with an inclined hole (73) for the guide rods (71) to pass through, the diameter of the inclined hole (73) being equal to the diameter of the guide rod (71).

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