High-precision injection molding blood collection tube mold and injection molding processing equipment and method

Abstract

The present invention relates to the technical field of injection molds, and specifically to a high-precision injection-molded blood collection tube mold and an injection molding processing device and method, comprising a fixed mold and a movable mold, wherein a plurality of forming cavities are opened in the upper end of the fixed mold, and a plurality of forming columns are fixedly connected to the lower end of the movable mold, and the positions of the forming columns correspond to the forming cavities, and a plurality of groups of first push rods are movably connected in the lower ends of the forming cavities; after the movable mold and the fixed mold are fitted together, the connecting plate is driven by the T-shaped connecting rod to move upward, and after the connecting plate moves upward, it is clamped in the clamping hole through a limiting mechanism, and when the injection molding is completed, the limiting mechanism is pushed to be disengaged from the clamping hole, and at this time, an arc-shaped baffle plate will be inserted into the connection between the forming cavity and the liquid guide groove, and the molten liquid in the liquid guide groove is separated from the molten liquid in the forming cavity, so that the cooled injection molded part and the material in the liquid guide groove are in a separated state.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a high-precision injection-molded blood collection tube mold and injection molding processing equipment and method. Background Art

[0002] For example, the Chinese patent with announcement number CN110315697A discloses a high-precision molding mold assembly, wherein a positioning mold groove is provided on the top of the lower mold, a positioning blind hole is provided in the middle of the positioning mold groove, a positioning through hole matching the positioning blind hole is provided in the middle of the upper mold, an annular sealing ring is provided on the inner wall of the lower end of the positioning through hole, and a sealing ring extending in a ring around the positioning through hole is provided on the bottom of the upper mold; an injection flow channel extending from the top to the bottom is provided in the middle of the injection mold core, the lower end of the injection mold core passes through the positioning through hole and extends into the positioning blind hole, and an injection hole is provided on the side wall of the injection flow channel and is connected with the mold cavity through the injection hole.

[0003] However, the above scheme has the following shortcomings: in the above patent, the middle metal plate skeleton is positioned by the upper and lower molds, the injection mold core is positioned in the middle, the middle opening of the metal plate is injection molded by the injection mold core, and the flow channel of the injection mold core is opened and closed by the lifting of the injection mold core. However, for a mold that produces multiple groups of injection molded parts at one time, after the injection molding is completed, the cooled injection molding material in the flow channel will be connected with the cooling part in the molding cavity to form a whole. At this time, the operator is required to take out the multiple groups of injection molded parts and then cut them to separate the injection molded parts in the molding cavity from the injection molding material in the flow channel. The operation is relatively cumbersome. For this reason, we have introduced a high-precision injection molding blood collection tube mold and injection molding processing equipment and method. Summary of the invention

[0004] The object of the present invention is to provide a high-precision injection-molded blood collection tube mold and an injection molding processing device and method to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-precision injection molding blood collection tube mold, comprising a fixed mold and a movable mold, wherein a plurality of forming cavities are provided in the upper end of the fixed mold, and a plurality of forming columns are fixedly connected to the lower end of the movable mold, wherein the positions of the forming columns correspond to the forming cavities, and a plurality of first ejector rods are movably connected to the lower ends of the forming cavities, wherein the first ejector rods extend into the connecting cavity away from one end of the forming cavity and are fixedly connected to a lifting mechanism, wherein the connecting cavity is provided in the fixed mold, and both sides of the connecting cavity are connected to the external environment, and the lifting mechanism is arranged in the connecting cavity, and a liquid guide groove is provided in the upper end of the fixed mold, and the liquid guide groove is connected to the plurality of forming cavities;

[0006] Two groups of pressing plates are fixedly connected to the lower end of the movable mold, and a plurality of groups of T-shaped ejector rods are arranged in the liquid guide groove. The T-shaped ejector rods are movably connected to the fixed mold, and one end of the T-shaped ejector rod away from the liquid guide groove extends into the connecting cavity and is movably connected to the lifting mechanism. The movable mold moves downward to drive the pressing plate to squeeze the lifting mechanism. After the lifting mechanism is squeezed, it drives the first ejector rod and the T-shaped ejector rod to move downward. After the injection molding is completed, the movable mold is lifted upward, and the lifting mechanism drives the first ejector rod and the T-shaped ejector rod to lift the injection molded part.

[0007] A plurality of arc-shaped baffles are movably connected in the lower end of the movable mold, and the upper ends of the arc-shaped baffles extend into the sliding cavity and are fixedly connected to the connecting plate. The sliding cavity is provided in the movable mold, and the connecting plate is slidably connected in the sliding cavity. Two groups of clamping holes are provided in both ends of the connecting plate, and a limiting mechanism is clamped in the clamping holes. The limiting mechanism is arranged in the movable mold, and a plurality of plug-in grooves are provided in the upper end of the fixed mold, and the plug-in grooves are communicated with the liquid guide grooves.

[0008] Furthermore, the lifting mechanism includes a lifting plate, which is slidably connected in the connecting cavity, the upper end of the lifting plate is fixedly connected to a plurality of groups of first push rods, and the lower end of the T-shaped push rod is movably connected in the lifting plate.

[0009] Furthermore, a limit plate is fixedly sleeved on the outer side of the T-shaped push rod, and the limit plate is arranged in a clearance cavity. The clearance cavity is opened in the upper end of the lifting plate, and a first spring is sleeved on the outer side of the T-shaped push rod, one end of the first spring is fixedly connected to the limit plate, and the other end is fixedly connected to the clearance cavity.

[0010] Furthermore, extension plates are fixedly connected on both sides of the lifting plate, and one end of the extension plate away from the lifting plate extends into the external environment through a connecting cavity. A second spring is fixedly connected to the lower end of the lifting plate, and the other end of the second spring is fixedly connected to the connecting cavity.

[0011] Furthermore, the limiting mechanism includes a T-shaped limiting rod, which is slidably connected in a guide cavity, which is opened in a movable mold, and the clamping end of the T-shaped limiting rod extends into the sliding cavity. The lower end of the T-shaped limiting rod is fixedly connected with a push rod, which is slidably connected in a guide groove, which is opened in the movable mold. The lower end of the push rod is inserted into the plug-in groove, and a connecting spring is fixedly connected in the guide cavity, and the other end of the connecting spring is fixedly connected to the T-shaped limiting rod.

[0012] Furthermore, several groups of T-shaped connecting rods are movably connected in the connecting plate, a connecting hole is opened in the side of the T-shaped connecting rod away from the clamping hole, a curved rod is inserted in the connecting hole, the curved rod is movably connected in the connecting plate, one end of the curved rod away from the T-shaped connecting rod extends into the clamping hole, and a counterweight block is fixedly connected to the upper end of the connecting plate.

[0013] Furthermore, a support plate is fixedly sleeved on the outer side of the curved rod, and the support plate is slidably connected in the cavity. A support spring is sleeved on the outer side of the curved rod, and one end of the support spring is fixedly connected to the support plate, and the other end is fixedly connected to the cavity. A return spring is fixedly connected to the upper end of the T-shaped connecting rod, and the other end of the return spring is fixedly connected to the sliding cavity.

[0014] Furthermore, both sides of the movable mold and the fixed mold are fixedly connected with mounting plates, two groups of mounting screws are arranged in the mounting plates, a plurality of groups of guide rods are fixedly connected to the lower end of the movable mold, a plurality of groups of guide holes are opened in the upper end of the fixed mold, and the guide rods are inserted into the guide holes.

[0015] In addition, in order to achieve the above-mentioned purpose, the present invention also provides an injection molding processing equipment, including the above-mentioned high-precision injection molding blood collection tube mold.

[0016] In addition, in order to achieve the above-mentioned purpose, the present invention also provides an injection molding method for the above-mentioned high-precision injection molding blood collection tube mold, comprising:

[0017] S1. The movable mold is driven to approach the fixed mold by the injection molding equipment. When the movable mold moves, the two sets of pressing plates are driven to move. The pressing plates move to squeeze the extension plate, so that the lifting plate drives the first ejector rod and the T-shaped ejector rod to move. After the movable mold and the fixed mold are fitted, the T-shaped connecting rod is squeezed upward by the fixed mold. When the clamping holes at both ends of the connecting plate move to the position of the T-shaped limiting rod, the T-shaped limiting rod is clamped into the clamping holes under the elastic force of the connecting spring.

[0018] S2. The molten liquid can be injected into the forming cavity through the liquid guide groove opened in the upper end of the fixed mold. When the molten liquid is injected into the forming cavities of several groups, the push rod will be pushed outward with the continuous injection of the molten liquid, so that the T-shaped limit rod is disengaged from the clamping hole. Under the gravity of the counterweight block, the connecting plate moves downward, so that the arc baffle is plugged into the connection between the forming cavity and the liquid guide groove, so as to separate the molten liquid in the liquid guide groove from the molten liquid in the forming cavity;

[0019] S3. After cooling is completed, the movable mold is separated from the fixed mold, and the pressing plate will cancel the extrusion of the extension plate. Under the elastic force of the second spring, the first ejector rod and the T-type ejector rod move to lift the injection molded part, and the operator can directly take it out.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention cooperates with the guide rod and the guide hole, so that after the movable mold and the fixed mold are fitted together, the forming column can enter the corresponding forming cavity, thereby improving the accuracy of injection molding; after the movable mold and the fixed mold are fitted together, the connecting plate is driven by the T-shaped connecting rod to move upward, and after the connecting plate moves upward, it is clamped in the clamping hole through the limiting mechanism, so that the arc baffle plate does not move downward; when the injection molding is completed, the limiting mechanism is pushed out of the clamping hole, and at this time the arc baffle plate will be inserted into the connection between the forming cavity and the liquid guide groove, separating the molten liquid in the liquid guide groove from the molten liquid in the forming cavity, so that the cooled injection molded part and the material in the liquid guide groove are in a separated state, and there is no need to cut the injection molded part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention.

[0023] Figure 2 It is a schematic cross-sectional structure diagram of the fixed mold and the movable mold in the separated state of the present invention.

[0024] Figure 3 For the present invention Figure 2 Enlarged structural diagram at A in the middle.

[0025] Figure 4 For the present invention Figure 2 Enlarged structural diagram at B in the middle.

[0026] Figure 5 This is a schematic diagram of the top view of the fixed mold structure of the present invention.

[0027] Figure 6 It is a schematic cross-sectional structural diagram of the connection relationship between the curved rod and the connecting hole of the present invention.

[0028] Figure 7 It is a schematic diagram of the main structure of the present invention.

[0029] Figure 8 It is a three-dimensional structural schematic diagram of the connection relationship between the jacking plate and the extension plate of the present invention.

[0030] Fig. 9 It is a schematic diagram of the three-dimensional cross-sectional structure of the connection relationship between the arc-shaped baffle and the connecting plate of the present invention.

[0031] Fig.10It is a three-dimensional top view structural schematic diagram of the connection relationship between the curved rod and the connecting hole of the present invention.

[0032] In the figure: 1 fixed mold; 2 forming cavity; 3 T-type ejector rod; 4 supporting spring; 5 second spring; 6 lifting plate; 7 first ejector rod; 8 liquid guide groove; 9 forming column; 10 guide rod; 11 arc-shaped baffle plate; 12 T-type connecting rod; 13 connecting plate; 14 counterweight; 15 sliding cavity; 16 mounting screw; 17 mounting plate; 18 T-type limiting rod; 19 supporting plate; 20 snap-in hole; 21 push rod; 22 guide groove; 23 connecting spring; 24 guide cavity; 25 movable mold; 26 limiting plate; 27 giving way cavity; 28 first spring; 29 guide hole; 30 plug-in groove; 31 extension plate; 32 pressure plate; 33 connecting cavity; 34 reset spring; 35 connecting hole; 36 curved rod; 37 cavity. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1-10 , the present invention provides a technical solution:

[0035] Embodiment 1:

[0036] A high-precision injection molding blood collection tube mold, comprising a fixed mold 1 and a movable mold 25, wherein the upper end of the fixed mold 1 is provided with a plurality of forming cavities 2, and the lower end of the movable mold 25 is fixedly connected with a plurality of forming columns 9, the position of the forming columns 9 corresponds to the forming cavity 2, and the lower ends of the plurality of forming cavities 2 are movably connected with first ejector rods 7, the first ejector rods 7 extend into a connecting cavity 33 away from one end of the forming cavity 2, and are fixedly connected with an ejection mechanism, the connecting cavity 33 is provided in the fixed mold 1, and both sides of the connecting cavity 33 are connected with the external environment, and the ejection mechanism is arranged in the connecting cavity 33, and the upper end of the fixed mold 1 is provided with a liquid guide groove 8, and the liquid guide groove 8 is connected with the plurality of forming cavities 2, and the molten liquid can be injected into the forming cavity 2 through the liquid guide groove 8 provided in the upper end of the fixed mold 1;

[0037] The lower end of the movable mold 25 is fixedly connected with two groups of pressing plates 32, and a plurality of groups of T-shaped ejector rods 3 are arranged in the liquid guide groove 8. The T-shaped ejector rods 3 are movably connected to the fixed mold 1. The end of the T-shaped ejector rod 3 away from the liquid guide groove 8 extends into the connecting cavity 33 and is movably connected to the lifting mechanism. The movable mold 25 moves downward to drive the pressing plate 32 to squeeze the lifting mechanism. After the lifting mechanism is squeezed, the first ejector rod 7 and the T-shaped ejector rod 3 are driven to move downward. After the injection molding is completed, the movable mold 25 is lifted upward, and the lifting mechanism drives the first ejector rod 7 and the T-shaped ejector rod 3 to lift the injection molded part, and the operator can directly take it out.

[0038] A plurality of groups of arc-shaped baffles 11 are movably connected in the lower end of the movable mold 25. The arc-shaped baffles 11 are arranged in an arc shape near the side of the corresponding forming cavity 2. The arc-shaped baffles 11 are inserted into the connection between the forming cavity 2 and the liquid guide groove 8 to separate the molten liquid in the liquid guide groove 8 from the molten liquid in the forming cavity 2 so that the two will not stick together after cooling. The upper end of the arc-shaped baffle 11 extends into the sliding cavity 15 and is fixedly connected to the connecting plate 13. The sliding cavity 15 is provided in the movable mold 25. The connecting plate 13 is slidably connected in the sliding cavity 15. Two groups of clamping holes 20 are provided in both ends of the connecting plate 13. The clamping holes 20 are clamped with a limiting mechanism. The limiting mechanism is arranged in the movable mold 25. A plurality of groups of plug-in grooves 30 are provided in the upper end of the fixed mold 1. The plug-in grooves 30 are connected to the liquid guide groove 8.

[0039] The limiting mechanism includes a T-shaped limiting rod 18, which is slidably connected to a guide cavity 24, which is provided in a movable mold 25, and a clamping end of the T-shaped limiting rod 18 extends into the sliding cavity 15. A push rod 21 is fixedly connected to the lower end of the T-shaped limiting rod 18, and the push rod 21 is slidably connected to a guide groove 22, which is provided in the movable mold 25. The lower end of the push rod 21 is inserted into a plug-in groove 30. After the push rod 21 is inserted into the plug-in groove 30, it fits tightly with the plug-in groove 30. With the continuous injection of molten liquid, the push rod 21 inserted in the plug-in groove 30 will be pushed to move outward, and the push rod 21 drives the T-shaped limiting rod 18 to move during the movement.

[0040] A connecting spring 23 is fixedly connected in the guide cavity 24, and the other end of the connecting spring 23 is fixedly connected to the T-shaped limit rod 18. Since the lower end of the T-shaped limit rod 18 is arranged in an arc shape, during the upward movement of the connecting plate 13, the T-shaped limit rod 18 will be squeezed to move into the guide cavity 24. When the clamping holes 20 opened at both ends of the connecting plate 13 move to the position of the T-shaped limit rod 18, under the action of the elastic force of the connecting spring 23, the T-shaped limit rod 18 will be clamped into the clamping holes 20, so that the connecting plate 13 cannot continue to move.

[0041] Embodiment 2:

[0042] On the basis of Example 1, in order to prevent the arc-shaped baffle 11 from falling and being inserted into the liquid guide groove 8 before the injection molding is completed, the lifting mechanism includes a lifting plate 6, which is slidably connected to the connecting cavity 33, and the upper end of the lifting plate 6 is fixedly connected to a plurality of groups of first ejector rods 7, and the lower end of the T-shaped ejector rod 3 is movably connected to the lifting plate 6. Both sides of the lifting plate 6 are fixedly connected with extension plates 31, and the end of the extension plate 31 away from the lifting plate 6 extends into the external environment through the connecting cavity 33. The lower end of the lifting plate 6 is fixedly connected with a second spring 5, and the other end of the second spring 5 is fixedly connected to the connecting cavity 33. During the movement of the movable mold 25, the two groups of pressing plates 32 connected to the lower end thereof will be driven to move, and the pressing plate 32 moves to squeeze the extension plate 31, and when the extension plate 31 moves, the lifting plate 6 is driven to move synchronously, and when the lifting plate 6 moves, the first ejector rod 7 and the T-shaped ejector rod 3 are driven to move synchronously;

[0043] The outer side of the T-shaped ejector rod 3 is fixedly sleeved with a limit plate 26, and the limit plate 26 is arranged in a clearance cavity 27. The clearance cavity 27 is opened in the upper end of the jacking plate 6. The outer side of the T-shaped ejector rod 3 is sleeved with a first spring 28, and one end of the first spring 28 is fixedly connected to the limit plate 26, and the other end is fixedly connected to the clearance cavity 27. When the jacking plate 6 moves downward, the first ejector rod 7 will move with it, and under the elastic force of the first spring 28, the T-shaped ejector rod 3 will not move downward with it. When the lower end of the jacking plate 6 contacts the lower end of the T-shaped ejector rod 3, as the jacking plate 6 moves downward, the T-shaped ejector rod 3 will move with the jacking plate 6, ensuring that after the first ejector rod 7 contacts the lower end of the forming cavity 2, the T-shaped ejector rod 3 is also level with the liquid guide groove 8;

[0044] The limiting mechanism includes a T-shaped limiting rod 18, which is slidably connected in a guide cavity 24, which is opened in a movable mold 25. The clamping end of the T-shaped limiting rod 18 extends into the sliding cavity 15. The lower end of the T-shaped limiting rod 18 is fixedly connected with a push rod 21, which is slidably connected in a guide groove 22, which is opened in the movable mold 25. The lower end of the push rod 21 is inserted into the insertion groove 30. A connecting spring 23 is fixedly connected in the guide cavity 24, and the other end of the connecting spring 23 is fixedly connected to the T-shaped limiting rod 18.

[0045] A plurality of groups of T-shaped connecting rods 12 are movably connected in the connecting plate 13. A connecting hole 35 is provided in the side of the T-shaped connecting rod 12 away from the clamping hole 20. A curved rod 36 is inserted in the connecting hole 35. The curved rod 36 is movably connected in the connecting plate 13. One end of the curved rod 36 away from the T-shaped connecting rod 12 extends into the clamping hole 20. A counterweight block 14 is fixedly connected to the upper end of the connecting plate 13. When the movable mold 25 is separated from the fixed mold 1, the T-shaped connecting rod 12 will move downward under the elastic force of the reset spring 34, so that the curved rod 36 is clamped into the connecting hole 35 again. At this time, when the lower end of the T-shaped connecting rod 12 contacts the lower end of the fixed mold 1 again, the connecting plate 13 will be lifted up again.

[0046] The outer side of the curved rod 36 is fixedly sleeved with a support plate 19, and the support plate 19 is slidably connected in the cavity 37. The outer side of the curved rod 36 is sleeved with a support spring 4, one end of the support spring 4 is fixedly connected to the support plate 19, and the other end is fixedly connected to the cavity 37. The upper end of the T-shaped connecting rod 12 is fixedly connected with a return spring 34, and the other end of the return spring 34 is fixedly connected to the sliding cavity 15. When the T-shaped limit rod 18 is inserted into the clamping hole 20, the curved rod 36 will be pushed to move, and the movement of the curved rod 36 drives the support plate 19 to move synchronously, and the support plate 19 compresses the support spring 4 when moving;

[0047] The movable mold 25 and the fixed mold 1 are fixedly connected with mounting plates 17 on both sides, and two sets of mounting screws 16 are arranged in the mounting plate 17. Through the arrangement of the mounting plate 17 and the mounting screws 16, the movable mold 25 and the fixed mold 1 can be installed together with the injection molding equipment. A plurality of guide rods 10 are fixedly connected to the lower end of the movable mold 25, and a plurality of guide holes 29 are opened in the upper end of the fixed mold 1, and the guide rods 10 are inserted into the guide holes 29.

[0048] In addition, in order to achieve the above-mentioned purpose, the present invention also provides an injection molding processing equipment, including the above-mentioned high-precision injection molding blood collection tube mold.

[0049] In addition, in order to achieve the above-mentioned purpose, the present invention also provides an injection molding method for the above-mentioned high-precision injection molding blood collection tube mold, comprising:

[0050] S1. The movable mold 25 is driven to approach the fixed mold 1 by the injection molding equipment. When the movable mold 25 moves, the two sets of pressing plates 32 are driven to move. The pressing plates 32 move to squeeze the extension plate 31, so that the lifting plate 6 drives the first ejector rod 7 and the T-shaped ejector rod 3 to move. After the movable mold 25 is fitted with the fixed mold 1, the T-shaped connecting rod 12 is squeezed and moved upward by the fixed mold 1. When the clamping holes 20 located at both ends of the connecting plate 13 move to the position of the T-shaped limiting rod 18, the T-shaped limiting rod 18 is clamped into the clamping holes 20 under the elastic force of the connecting spring 23;

[0051] S2. The molten liquid can be injected into the forming cavity 2 through the liquid guide groove 8 opened in the upper end of the fixed mold 1. When the molten liquid is injected into the forming cavities 2 of several groups, the push rod 21 will be pushed outward with the continuous injection of the molten liquid, so that the T-shaped limit rod 18 is disengaged from the clamping hole 20, and the connecting plate 13 moves downward under the gravity of the counterweight block 14, so that the arc baffle 11 is plugged into the connection between the forming cavity 2 and the liquid guide groove 8, so as to separate the molten liquid in the liquid guide groove 8 from the molten liquid in the forming cavity 2;

[0052] S3. After cooling is completed, the movable mold 25 is separated from the fixed mold 1, and the pressing plate 32 will cancel the extrusion of the extension plate 31. Under the elastic force of the second spring 5, the first ejector rod 7 and the T-shaped ejector rod 3 move to lift the injection molded part, and the operator can directly take it out.

[0053] Working principle: when in use, the movable mold 25 and the fixed mold 1 are installed together with the injection molding equipment, and the movable mold 25 is driven by the injection molding equipment to approach the fixed mold 1. During the movement of the movable mold 25, the guide rod 10 will be inserted into the guide hole 29, so that after the movable mold 25 and the fixed mold 1 are attached together, the forming column 9 can enter the corresponding forming cavity 2, thereby improving the precision of injection molding. During the movement of the movable mold 25, the two sets of pressing plates 32 connected to its lower end will be driven to move, and the pressing plate 32 moves to squeeze the extension plate 31. When the extension plate 31 moves, it drives the lifting plate 6 to move synchronously, and when the lifting plate 6 moves, it drives the first ejector rod 7 and the T-shaped ejector rod 3 to move synchronously.

[0054] When the movable mold 25 is fully fitted with the fixed mold 1, the T-shaped ejector rod 3 is retracted into the fixed mold 1 and is flush with the liquid guide groove 8, and the first ejector rod 7 is retracted into the fixed mold 1, so that the lower end of the forming cavity 2 forms a complete arc. At the same time, after the movable mold 25 is fully fitted with the fixed mold 1, the T-shaped connecting rod 12 will be squeezed by the fixed mold 1 and move upward. The upward movement of the T-shaped connecting rod 12 drives the connecting plate 13 to move synchronously. The movement of the connecting plate 13 drives the several groups of arc-shaped baffles 11 connected to its lower end to move. Since the lower end of the T-shaped limit rod 18 is arranged in an arc shape, the T-shaped limit rod 18 will be squeezed to move into the guide cavity 24 during the upward movement of the connecting plate 13. When the clamping holes 20 opened at both ends of the connecting plate 13 move to the position of the T-shaped limit rod 18, under the elastic force of the connecting spring 23, the T-shaped limit rod 18 will be clamped into the clamping hole 20, so that the connecting plate 13 cannot continue to move;

[0055] When the T-shaped limiting rod 18 is clamped into the clamping hole 20, the T-shaped limiting rod 18 pushes the curved rod 36 to move, so that the clamping end of the curved rod 36 is disengaged from the connecting hole 35. At this time, the T-shaped connecting rod 12 is in a movable state.

[0056] After the movable mold 25 is completely fitted with the fixed mold 1, the push rod 21 connected to the lower end of the T-shaped limit rod 18 will be inserted into the insertion groove 30. At this time, the molten liquid can be injected into the forming cavity 2 through the liquid guide groove 8 opened in the upper end of the fixed mold 1. When the molten liquid is injected into the forming cavity 2 of several groups, the push rod 21 inserted in the insertion groove 30 will be pushed to move outward with the continuous injection of the molten liquid. The push rod 21 drives the T-shaped limit rod 18 to move during the movement. When the T-shaped limit rod 18 is disengaged from the clamping hole 20, the connecting plate 13 moves downward under the gravity of the counterweight block 14. The movement of the connecting plate 13 drives several groups of arc baffles 11 to move synchronously, so that the arc baffle 11 is inserted into the connection between the forming cavity 2 and the liquid guide groove 8, and the molten liquid in the liquid guide groove 8 is separated from the molten liquid in the forming cavity 2, so that the two will not stick together after cooling;

[0057] After cooling is completed, the movable mold 25 is separated from the fixed mold 1. At this time, the pressing plate 32 will stop squeezing the extension plate 31. Under the elastic force of the second spring 5, the lifting plate 6 moves upward and drives the first push rod 7 and the T-shaped push rod 3 to move. At this time, the injection-molded blood collection tube and the cooling component located in the liquid guide groove 8 can be lifted up, and the operator can directly take them out.

[0058] When the movable mold 25 is separated from the fixed mold 1, under the elastic force of the reset spring 34, the T-shaped connecting rod 12 will move downward, so that the curved rod 36 is re-engaged in the connecting hole 35. At this time, when the lower end of the T-shaped connecting rod 12 contacts the lower end of the fixed mold 1 again, the connecting plate 13 will be lifted up again.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision injection molding mold for blood collection tubes, comprising a fixed mold (1) and a movable mold (25), characterized in that: The upper end of the fixed mold (1) is provided with a plurality of forming cavities (2); the lower end of the movable mold (25) is fixedly connected with a plurality of forming columns (9); the positions of the forming columns (9) correspond to the forming cavities (2); the lower ends of the plurality of forming cavities (2) are movably connected with first ejector rods (7); the first ejector rods (7) extend into the connecting cavity (33) at one end away from the forming cavity (2) and are fixedly connected to a lifting mechanism; the connecting cavity (33) is provided in the fixed mold (1); both sides of the connecting cavity (33) are connected to the external environment; the lifting mechanism is arranged in the connecting cavity (33); the upper end of the fixed mold (1) is provided with a liquid guide groove (8); the liquid guide groove (8) is connected to the plurality of forming cavities (2); The lower end of the movable mold (25) is fixedly connected to two groups of pressing plates (32), and a plurality of groups of T-shaped ejector rods (3) are arranged in the liquid guide groove (8). The T-shaped ejector rods (3) are movably connected to the fixed mold (1). The end of the T-shaped ejector rod (3) away from the liquid guide groove (8) extends into the connecting cavity (33) and is movably connected to the lifting mechanism. The movable mold (25) moves downward to drive the pressing plate (32) to squeeze the lifting mechanism. After the lifting mechanism is squeezed, it drives the first ejector rod (7) and the T-shaped ejector rod (3) to move downward. After the injection molding is completed, the movable mold (25) is lifted upward, and the lifting mechanism drives the first ejector rod (7) and the T-shaped ejector rod (3) to lift the injection molded part. A plurality of groups of arc-shaped baffles (11) are movably connected in the lower end of the movable mold (25); the upper end of the arc-shaped baffles (11) extends into the sliding cavity (15) and is fixedly connected to the connecting plate (13); the sliding cavity (15) is provided in the movable mold (25); the connecting plate (13) is slidably connected in the sliding cavity (15); two groups of clamping holes (20) are provided in both ends of the connecting plate (13); a limiting mechanism is clamped in the clamping holes (20); the limiting mechanism is provided in the movable mold (25); a plurality of groups of plug-in grooves (30) are provided in the upper end of the fixed mold (1); the plug-in grooves (30) are connected to the liquid guide groove (8); The limiting mechanism comprises a T-shaped limiting rod (18), the T-shaped limiting rod (18) is slidably connected in a guide cavity (24), the guide cavity (24) is provided in a movable mold (25), the clamping end of the T-shaped limiting rod (18) extends into the sliding cavity (15), the lower end of the T-shaped limiting rod (18) is fixedly connected with a push rod (21), the push rod (21) is slidably connected in a guide groove (22), the guide groove (22) is provided in the movable mold (25), the lower end of the push rod (21) is plugged into a plug-in groove (30), a connecting spring (23) is fixedly connected in the guide cavity (24), and the other end of the connecting spring (23) is fixedly connected to the T-shaped limiting rod (18); A plurality of groups of T-shaped connecting rods (12) are movably connected in the connecting plate (13); a connecting hole (35) is provided in the side of the T-shaped connecting rod (12) away from the clamping hole (20); a curved rod (36) is inserted into the connecting hole (35); the curved rod (36) is movably connected in the connecting plate (13); one end of the curved rod (36) away from the T-shaped connecting rod (12) extends into the clamping hole (20); and a counterweight (14) is fixedly connected to the upper end of the connecting plate (13); A support plate (19) is fixedly sleeved on the outer side of the curved rod (36), the support plate (19) is slidably connected in the cavity (37), a support spring (4) is sleeved on the outer side of the curved rod (36), one end of the support spring (4) is fixedly connected to the support plate (19), and the other end is fixedly connected to the cavity (37), and a return spring (34) is fixedly connected to the upper end of the T-shaped connecting rod (12), and the other end of the return spring (34) is fixedly connected to the sliding cavity (15).

2. A high-precision injection molded blood collection tube mold according to claim 1, characterized in that: The lifting mechanism comprises a lifting plate (6), the lifting plate (6) is slidably connected in the connection cavity (33), the upper end of the lifting plate (6) is fixedly connected to a plurality of groups of first lifting rods (7), and the lower end of the T-shaped lifting rod (3) is movably connected in the lifting plate (6).

3. A high-precision injection molded blood collection tube mold according to claim 2, characterized in that: The outer side of the T-shaped push rod (3) is fixedly sleeved with a limit plate (26), the limit plate (26) is arranged in a clearance cavity (27), the clearance cavity (27) is opened in the upper end of the lifting plate (6), and the outer side of the T-shaped push rod (3) is sleeved with a first spring (28), one end of the first spring (28) is fixedly connected to the limit plate (26), and the other end is fixedly connected to the clearance cavity (27).

4. A high-precision injection molded blood collection tube mold according to claim 3, characterized in that: Extension plates (31) are fixedly connected to both sides of the lifting plate (6); one end of the extension plate (31) away from the lifting plate (6) extends into the external environment through a connecting cavity (33); a second spring (5) is fixedly connected to the lower end of the lifting plate (6); the other end of the second spring (5) is fixedly connected to the connecting cavity (33).

5. The high-precision injection mold for blood collection tube according to claim 1, characterized in that: The movable mold (25) and the fixed mold (1) are both fixedly connected with a mounting plate (17) on both sides, and two groups of mounting screws (16) are arranged in the mounting plate (17). The lower end of the movable mold (25) is fixedly connected with a plurality of groups of guide rods (10), and the upper end of the fixed mold (1) is provided with a plurality of groups of guide holes (29), and the guide rods (10) are inserted into the guide holes (29).

6. An injection molding equipment, characterized in that: A high-precision injection molded blood collection tube mold comprising any one of claims 1 to 5.

7. An injection molding method for the high-precision injection molding mold for blood collection tubes according to any one of claims 1 to 5, characterized in that: include: S1. The movable mold (25) is driven to approach the fixed mold (1) by the injection molding equipment. When the movable mold (25) moves, the two sets of pressing plates (32) are driven to move. The pressing plates (32) move to squeeze the extension plate (31), so that the lifting plate (6) drives the first ejector rod (7) and the T-shaped ejector rod (3) to move. After the movable mold (25) and the fixed mold (1) are fitted together, the T-shaped connecting rod (12) is squeezed by the fixed mold (1) to move upward. When the clamping holes (20) located at both ends of the connecting plate (13) move to the position of the T-shaped limiting rod (18), the T-shaped limiting rod (18) is clamped into the clamping holes (20) under the elastic force of the connecting spring (23); S2. The molten liquid can be injected into the forming cavity (2) through the liquid guide groove (8) provided in the upper end of the fixed mold (1). When the molten liquid is injected into the forming cavities (2) of the plurality of groups, the push rod (21) is pushed outward as the molten liquid is continuously injected, so that the T-shaped limit rod (18) is disengaged from the clamping hole (20). Then, under the gravity of the counterweight (14), the connecting plate (13) moves downward, so that the arc-shaped baffle plate (11) is plugged into the connection between the forming cavity (2) and the liquid guide groove (8), thereby separating the molten liquid in the liquid guide groove (8) from the molten liquid in the forming cavity (2); S3. After cooling is completed, the movable mold (25) is separated from the fixed mold (1), and the pressing plate (32) stops squeezing the extension plate (31). Under the elastic force of the second spring (5), the first ejector rod (7) and the T-shaped ejector rod (3) move to lift the injection molded part, and the operator can directly take it out.

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