A flow regulating device for forming a tube embryo vacuum mold

Abstract

The present application discloses a flow regulating device for forming a tube embryo blister mold, characterized in that it comprises a tube embryo blister mold body (1), a hollow tubular main core shaft (2) is arranged in the tube embryo blister mold body (1), a blister tube (3) is arranged in the main core shaft (2), the blister tube (3) is sleeved in the main core shaft (2) and is coaxially arranged with the main core shaft (2); the lower end of the main core shaft (2) protrudes from the lower end surface of the tube embryo blister mold body (1), the lower end of the tube embryo blister mold body (1) is fixedly connected with an internal hollow forming die (4), the lower end of the main core shaft (2) is sleeved in the forming die (4), and a spacing is arranged between the lower section outer surface of the main core shaft (2) and the inner surface of the forming die (4) to form a lower flow channel; the middle section of the main core shaft (2) is sleeved with a drainage ring (6). The advantages of the present invention are that it can overcome the disadvantages of the prior art and the structural design is reasonable and novel.

Description

Technical Field

[0001] The invention relates to a flow regulating device for a tube embryo vacuum forming mold, belonging to the field of vacuum forming molds. Background Art

[0002] Blistering, also known as hollow blistering, is a rapidly developing plastic processing method. During World War II, the blistering process began to be used to produce low-density polyethylene bottles. In the late 1950s, with the birth of high-density polyethylene and the development of blister forming machines, blister technology has been widely used. The volume of hollow containers can reach thousands of liters, and some production has been computer-controlled. Plastics suitable for blistering include polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the resulting hollow containers are widely used as industrial packaging containers. According to the parison production method, blistering can be divided into extrusion blistering and injection blistering, and the newly developed ones are multi-layer blistering and stretch blistering. When medical ampoules are produced using blister molds, due to the uneven flow rate of the melt entering the blister mold and insufficient fusion, multiple weld marks will be formed on the surface of the finished ampoule, affecting the production quality of the ampoule. Summary of the invention

[0003] The technical solution of the present invention aims at the shortcomings in the prior art that "when medical ampoules are produced using blister molds, due to uneven flow rate and insufficient fusion of the molten material entering the blister mold, multiple welding marks are formed on the surface of the finished ampoule bottle, affecting the production quality of the ampoule bottle." A tube embryo blister mold forming flow channel flow regulating device is provided.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is a flow regulating device for a tube embryo blister mold forming flow channel, characterized in that it includes a tube embryo blister mold body, a hollow tubular main core shaft is arranged in the tube embryo blister mold body, a blister tube is arranged in the main core shaft, the blister tube is sleeved in the main core shaft and is coaxially arranged with the main core shaft; the lower end of the main core shaft protrudes from the lower end surface of the tube embryo blister mold body, the lower end of the tube embryo blister mold body is fixedly connected to an internal hollow forming die, the lower end of the main core shaft is sleeved in the forming die and the lower section of the main core shaft is externally A gap is arranged between the surface and the inner surface of the forming die to form a lower flow channel; a drainage ring is sleeved on the middle section of the main core shaft, a feed port is arranged on the side of the main body of the tube embryo blister mold, a longitudinal flow channel is arranged in the drainage ring, one end of the longitudinal flow channel in the drainage ring is connected with the feed port, and the lower flow channel between the outer surface of the lower section of the main core shaft and the inner surface of the forming die is connected with the other end of the longitudinal flow channel; a flow regulating screw is arranged on the side of the main body of the tube embryo blister mold, and the end of the flow regulating screw is inserted into the longitudinal flow channel on the drainage ring and is threadedly connected with the drainage ring.

[0005] In the technical solution of the present application, a flow regulating screw is provided at the longitudinal flow channel of the drainage ring. By rotating the flow regulating screw, the opening area of ​​the longitudinal flow channel in the drainage ring can be adjusted, thereby adjusting the flow rate and flow velocity flowing through the drainage ring. By adjusting the flow rate and flow velocity, the molten material in the flow channel has more time to mix, thereby improving the uniformity of mixing and preventing the appearance of welding marks on the surface of the ampoule bottle.

[0006] Optimized, the above-mentioned tube embryo vacuum molding flow channel flow regulating device, the middle section of the main core shaft is sleeved with an upper bushing and a diverter ring, the drainage ring is located between the upper bushing and the diverter ring; the lower end face of the upper bushing and the upper end face of the drainage ring are respectively provided with a semi-annular groove one, the lower end face of the upper bushing and the groove one of the drainage ring are connected to form a semi-annular flow channel one, and the two ends of the semi-annular flow channel one are respectively connected with the feed port and the longitudinal flow channel; the lower end face of the drainage ring and the upper end face of the diverter ring are respectively provided with a semi-annular groove two, the lower end face of the drainage ring and the groove two of the upper end face of the diverter ring are connected to form a semi-annular flow channel two, and the lower flow channel and the longitudinal flow channel are connected with the semi-annular flow channel two.

[0007] In the present application, the lower end face of the upper bushing and the groove of the drainage ring are connected to form a semi-annular flow channel 1. The semi-annular flow channel 1 is semi-annular. The molten material entering through the feed port is buffered by the semi-annular semi-annular flow channel 1, which reduces the vertical impact of the molten material on the workpiece, thereby achieving the purpose of increasing the working life and preventing the fatigue of the workpiece. In addition, the semi-annular flow channel 1 can slow down the flow rate of the molten material so as to better achieve the purpose of flow control in the middle of the drainage ring. The semi-annular flow channel 1 forces the molten material to change from linear motion to circular motion, which can better mix the material flow and prepare for the basic round tube embryo.

[0008] Optimized, the above-mentioned tube embryo blister mold forming flow channel flow regulating device, the side of the tube embryo blister mold body is provided with a guide sleeve and a pressure block, the guide sleeve is inserted into the tube embryo blister mold body, one end of the pressure block is inserted into the side of the tube embryo blister mold body and is in tight contact with the end of the guide sleeve; the flow regulating screw passes through the guide sleeve, the pressure block and is threadedly connected to the pressure block; the diameter of the end of the flow regulating screw is larger than the inner diameter of the longitudinal flow channel, and when the end of the flow regulating screw is in contact with the inner side surface of the longitudinal flow channel, the flow regulating screw blocks the longitudinal flow channel.

[0009] In this application, the flow regulating screw and the pressure block are connected by threads, and the position and movement direction of the flow regulating screw are fixed by the pressure block and the guide sleeve to prevent the flow regulating screw from deviating from the position during rotation adjustment, so that the flow regulating screw can better cooperate with the longitudinal flow channel in the drainage ring.

[0010] Optimized, the above-mentioned tube embryo vacuum molding flow channel flow regulating device, the end of the flow regulating screw is a ball head arc, and the side wall of the longitudinal flow channel is provided with a groove that matches the end shape of the flow regulating screw; the flow regulating screw is provided with two raised limiting sections set at intervals, and the two raised limiting sections are respectively located on both sides of the pressing block.

[0011] In the present application, the two spaced-apart raised limit sections on the flow regulating screw play a foolproof role. When the flow regulating screw reaches the limit position, the outer raised limit section limits the position of the flow regulating screw to prevent it from hitting the inner parts. When the flow regulating screw is twisted outward and the stroke reaches a certain extent, the inner raised limit section prevents the flow regulating screw from detaching from the guide sleeve to prevent glue leakage.

[0012] Optimized, the above-mentioned tube embryo suction mold forming flow channel flow regulating device, the middle section of the main core shaft is sleeved with an extrusion ring, the extrusion ring is located below the diverter ring and fits with the diverter ring, the annular inner surface of the extrusion ring and the outer surface of the main core shaft are spaced apart to form an annular extrusion cavity; an annular extrusion protrusion ring is arranged on the annular inner surface of the extrusion ring, and the annular inner surface of the extrusion protrusion ring is spaced apart from the outer surface of the main core shaft; the distance between the inner ring surface at the upper end of the extrusion ring and the outer surface of the middle section of the main core shaft is greater than the distance between the inner ring surface at the lower end of the extrusion ring and the outer surface of the middle section of the main core shaft, and the distance between the inner ring surface at the lower end of the extrusion ring and the outer surface of the middle section of the main core shaft is greater than the distance between the extrusion protrusion ring and the outer surface of the middle section of the main core shaft.

[0013] In the present application, the molten material flow controlled by the flow regulating screw reaches the semi-annular flow channel 1 and the semi-annular flow channel 2 and then enters the flow channel space between the extrusion ring and the main core shaft. The pressure of the molten material flow is increased by the extrusion limiting effect of the extrusion protrusion ring, so that the molten material flow entering the flow channel space between the extrusion ring and the main core shaft is fully mixed, thereby preventing and eliminating the welding marks on the surface of the ampoule bottle.

[0014] Optimized, the above-mentioned tube embryo blister mold forming flow channel flow regulating device, the main core shaft is located between the diverter ring and the molding die and is spaced apart from the inner wall of the tube embryo blister mold body; the main core shaft is sleeved with a middle section support member that supports the distance between the main core shaft and the inner wall of the tube embryo blister mold body, the middle section support member is annular, the annular inner wall of the middle section support member fits against the outer surface of the main core shaft, and the annular outer wall of the middle section support member fits against the inner wall of the tube embryo blister mold body.

[0015] The main mandrel and the upper bushing are positioned in coordination, and the part between the main mandrel and the upper bushing and the molding die is in a suspended state. In this state, the molding die is prone to shaking, and the molding die will be deviated by the molten material flow during operation, resulting in uneven thickness of the finished ampoule bottle, affecting the flow rate stability, and easily forming weld marks. In this application, a middle section support is used to support the main mandrel, which improves the stability of the main mandrel and the molding die, improves the thickness stability of the extruded ampoule tube embryo, and can reduce the appearance of weld marks.

[0016] Optimized, the above-mentioned tube embryo vacuum molding flow channel flow regulating device, the middle section support part includes a support ring, a second diverter ring and a sealing ring, the support ring, the second diverter ring and the sealing ring are sequentially sleeved on the main core shaft; the support ring is provided with a plurality of support ring guide grooves which penetrate the support ring along a direction parallel to the main core shaft length extension direction, and the second diverter ring is provided with a plurality of guide column cavities which penetrate the second diverter ring along a direction parallel to the main core shaft length extension direction; the cross-section of the support ring guide groove along the direction perpendicular to the main core shaft length extension direction is arc-shaped, the opening area of ​​the lower end of the support ring guide groove is larger than the inner diameter of the guide column cavity, and the support ring guide groove is connected with the guide column cavity; the annular inner surface of the sealing ring and the outer surface of the main core shaft are spaced apart to form an annular extrusion cavity II, and the lower end of the guide column cavity is connected with the lower flow channel through the extrusion cavity II.

[0017] In the present application, the middle section support member can not only provide stable support for the main core shaft and the molding die, but also play a role in slowing down the flow. The secondary slowing down of the molten material flow by the middle section support member can further improve the uniformity of the molten material flow velocity and the uniformity of fusion, thereby further preventing the occurrence of weld marks.

[0018] Optimized, the above-mentioned tube embryo vacuum molding flow channel flow regulating device, an annular extrusion protrusion ring 2 is arranged on the annular inner surface of the sealing ring, and the annular inner surface of the extrusion protrusion ring 2 is spaced apart from the outer surface of the main core shaft; the spacing between the inner ring surface of the upper end of the sealing ring and the outer surface of the main core shaft is greater than the spacing between the inner ring surface of the lower end of the sealing ring and the outer surface of the middle section of the main core shaft, and the spacing between the inner ring surface of the lower end of the sealing ring and the outer surface of the main core shaft is greater than the spacing between the extrusion protrusion ring 2 and the outer surface of the main core shaft.

[0019] In the present application, the pressure of the molten material flow is increased by the extrusion limiting effect of the extrusion protrusion ring 2, so that the molten material flow entering the flow channel space between the sealing ring and the main core shaft is fully mixed, thereby preventing and eliminating the welding mark on the surface of the ampoule bottle.

[0020] Optimized, the above-mentioned tube embryo suction mold molding flow channel flow regulating device, the opening area of ​​the upper end opening of the lower flow channel is larger than the opening area of ​​the lower end opening of the lower flow channel, the middle section of the lower flow channel is provided with an annular flow stabilizing protrusion ring, the flow stabilizing protrusion ring is arranged on the outer ring surface of the middle section of a section of the main core shaft that is sleeved on the inside of the molding die, and the outer ring surface of the flow stabilizing protrusion ring is spaced apart from the inner surface of the molding die.

[0021] In the present application, the opening area of ​​the upper end opening of the lower flow channel is larger than the opening area of ​​the lower end opening of the lower flow channel. The molten material flow through the lower flow channel is extruded through the lower flow channel to further improve the fusion uniformity. The function of the flow stabilizing protrusion ring is the same as that of the extrusion protrusion ring 2, so that the molten material flow is fully mixed, thereby eliminating the welding marks on the surface of the ampoule bottle.

[0022] Optimally, in the above-mentioned tube embryo vacuum molding flow channel flow regulating device, the middle section of the second semi-annular flow channel is connected to the longitudinal flow channel, and the two ends of the second semi-annular flow channel are respectively connected to the two symmetrical sides in the extrusion ring.

[0023] In the present application, the semi-annular flow channel 2 of the diverter ring evenly divides the molten material flow into two streams, and evenly feeds the material flow into the cavity between the extrusion ring and the main core shaft, so that the material flow can be evenly mixed between the extrusion ring and the main core shaft, thereby eliminating the welding marks on the surface of the ampoule bottle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 for Figure 1 AA section view;

[0026] Figure 3 for Figure 1 BB cross-sectional view. DETAILED DESCRIPTION

[0027] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] As shown in the figure, the present invention is a flow regulating device for a tube embryo blister mold forming flow channel, which is characterized in that: it includes a tube embryo blister mold body 1, a hollow tubular main core shaft 2 is arranged in the tube embryo blister mold body 1, a blister tube 3 is arranged in the main core shaft 2, and the blister tube 3 is sleeved in the main core shaft 2 and coaxially arranged with the main core shaft 2; the lower end of the main core shaft 2 protrudes from the lower end surface of the tube embryo blister mold body 1, the lower end of the tube embryo blister mold body 1 is fixedly connected with an internal hollow molding die 4, the lower end of the main core shaft 2 is sleeved in the molding die 4, and the outer surface of the lower section of the main core shaft 2 is connected to the molding die 4 is provided with a spacing arrangement and forms a lower flow channel; the middle section of the main core shaft 2 is sleeved with a drainage ring 6, a feed port 8 is provided on the side of the tube embryo blister mold body 1, a longitudinal flow channel is provided in the drainage ring 6, one end of the longitudinal flow channel in the drainage ring 6 is connected with the feed port 8, and the lower flow channel between the outer surface of the lower section of the main core shaft 2 and the inner surface of the molding die 4 is connected with the other end of the longitudinal flow channel; a flow regulating screw 9 is provided on the side of the tube embryo blister mold body 1, and the end of the flow regulating screw 9 is inserted into the longitudinal flow channel on the drainage ring 6 and is threadedly connected with the drainage ring 6.

[0029] In the technical solution of the present application, a flow regulating screw 9 is provided at the longitudinal flow channel of the drainage ring 6. By rotating the flow regulating screw 9, the opening area of ​​the longitudinal flow channel in the drainage ring 6 can be adjusted, thereby adjusting the flow rate and flow velocity flowing through the drainage ring 6. By adjusting the flow rate and flow velocity, the molten material in the flow channel has more time to mix, thereby improving the uniformity of mixing and preventing the appearance of welding marks on the surface of the ampoule bottle.

[0030] An upper sleeve 5 and a diverter ring 7 are sleeved on the middle section of the main core shaft 2, and the guide ring 6 is located between the upper sleeve 5 and the diverter ring 7; a semi-annular groove 10 is respectively provided on the lower end surface of the upper sleeve 5 and the upper end surface of the guide ring 6, and the lower end surface of the upper sleeve 5 and the groove 10 of the guide ring 6 are connected to form a semi-annular flow channel 1, and the two ends of the semi-annular flow channel 1 are respectively connected to the feed port 8 and the longitudinal flow channel; a semi-annular groove 2 11 is respectively provided on the lower end surface of the guide ring 6 and the upper end surface of the diverter ring 7, and the groove 2 11 on the lower end surface of the guide ring 6 and the upper end surface of the diverter ring 7 are connected to form a semi-annular flow channel 2, and the lower flow channel and the longitudinal flow channel are connected to the semi-annular flow channel 2.

[0031] In the present application, the lower end surface of the upper bushing 5 and the groove 10 of the drainage ring 6 are connected to form a semi-annular flow channel 1. The semi-annular flow channel 1 is semi-annular. The molten material entering through the feed port 8 is buffered by the semi-annular semi-annular flow channel 1, which reduces the vertical impact of the molten material on the workpiece, thereby achieving the purpose of increasing the working life and preventing the fatigue of the workpiece. In addition, the semi-annular flow channel 1 can smooth the flow rate of the molten material so as to better achieve the purpose of flow control in the middle of the drainage ring. The semi-annular flow channel 1 forces the molten material to change from linear motion to circular motion, which can better mix the material flow and prepare for the basic round tube embryo.

[0032] A guide sleeve 12 and a pressing block 13 are provided on the side of the tube embryo blister mold body 1, the guide sleeve 12 is inserted into the tube embryo blister mold body 1, one end of the pressing block 13 is inserted into the side of the tube embryo blister mold body 1 and is in tight contact with the end of the guide sleeve 12; the flow regulating screw 9 passes through the guide sleeve 12 and the pressing block 13 and is threadedly connected to the pressing block 13; the diameter of the end of the flow regulating screw 9 is larger than the inner diameter of the longitudinal flow channel, and the end of the flow regulating screw 9 is connected to the inner side surface of the longitudinal flow channel, and the flow regulating screw 9 blocks the longitudinal flow channel.

[0033] In the present application, the flow regulating screw 9 is connected to the pressure block 13 by a threaded connection. The position and movement direction of the flow regulating screw 9 are fixed by the pressure block 13 and the guide sleeve 12 to prevent the flow regulating screw 9 from deviating from the position during rotation adjustment, so that the flow regulating screw 9 can better cooperate with the longitudinal flow channel in the drainage ring 6.

[0034] The end of the flow regulating screw 9 is in a ball head arc shape, and a groove matching the shape of the end of the flow regulating screw 9 is provided on the side wall of the longitudinal flow channel; the flow regulating screw 9 is provided with two spaced-apart raised limit sections 91, and the two raised limit sections 91 are respectively located on both sides of the pressing block 13.

[0035] In the present application, the two spaced-apart raised limit sections 91 on the flow regulating screw 9 play a foolproof role. When the flow regulating screw 9 reaches the limit position, the outer raised limit section 91 limits the position of the flow regulating screw 9 to prevent it from hitting the inner parts. When the flow regulating screw 9 is twisted outward and the stroke reaches a certain extent, the inner raised limit section 91 prevents the flow regulating screw 9 from separating from the guide sleeve 12 to prevent glue leakage.

[0036] An extrusion ring 14 is sleeved on the middle section of the main core shaft 2. The extrusion ring 14 is located below the diverter ring 7 and fits with the diverter ring 7. The annular inner surface of the extrusion ring 14 is spaced apart from the outer surface of the main core shaft 2 to form an annular extrusion cavity; an annular extrusion protrusion ring 15 is provided on the annular inner surface of the extrusion ring 14, and the annular inner surface of the extrusion protrusion ring 15 is spaced apart from the outer surface of the main core shaft 2; the distance between the inner ring surface at the upper end of the extrusion ring 14 and the outer surface of the middle section of the main core shaft 2 is greater than the distance between the inner ring surface at the lower end of the extrusion ring 14 and the outer surface of the middle section of the main core shaft 2, and the distance between the inner ring surface at the lower end of the extrusion ring 14 and the outer surface of the middle section of the main core shaft 2 is greater than the distance between the extrusion protrusion ring 15 and the outer surface of the middle section of the main core shaft 2.

[0037] In the present application, the molten material flow controlled by the flow regulating screw 9 reaches the semi-annular flow channel 1 and the semi-annular flow channel 2 and then enters the flow channel space between the extrusion ring 14 and the main core shaft 2. The pressure of the molten material flow is increased by the extrusion limiting effect of the extrusion protrusion ring 15, so that the molten material flow entering the flow channel space between the extrusion ring 14 and the main core shaft 2 is fully mixed, thereby preventing and eliminating the welding marks on the surface of the ampoule bottle.

[0038] The part of the main core shaft 2 located between the diverter ring 7 and the molding die 4 is spaced apart from the inner wall of the tube embryo blister mold body 1; a middle section support member is sleeved on the main core shaft 2 to support the distance between the main core shaft 2 and the inner wall of the tube embryo blister mold body 1, and the middle section support member is annular, and the annular inner wall of the middle section support member is in contact with the outer surface of the main core shaft 2, and the annular outer wall of the middle section support member is in contact with the inner wall of the tube embryo blister mold body 1.

[0039] The main mandrel 2 and the upper bushing 5 are positioned in conjunction with each other, and the portion between the main mandrel 2 and the upper bushing 5 and the molding die 4 is in a suspended state. In this state, the molding die 4 is prone to shaking, and the molding die 4 will be deviated by the molten material flow during operation, resulting in uneven thickness of the finished ampoule bottle, affecting the flow rate stability, and easily forming weld marks. In this application, a middle section support is used to support the main mandrel 2, which improves the stability of the main mandrel 2 and the molding die 4, improves the thickness stability of the extruded ampoule bottle tube embryo, and can reduce the appearance of weld marks.

[0040] The middle section support member includes a support ring 151, a diverter ring 16 and a sealing ring 17, which are sequentially sleeved on the main core shaft 2; the support ring 151 is provided with a plurality of support ring guide grooves 18 penetrating the support ring 151 along a direction parallel to the length extension of the main core shaft 2, and the diverter ring 16 is provided with a plurality of guide column cavities 19 penetrating the diverter ring 16 along a direction parallel to the length extension of the main core shaft 2; the cross-section of the support ring guide groove 18 along the direction perpendicular to the length extension of the main core shaft 2 is arc-shaped, the opening area of ​​the lower end of the support ring guide groove 18 is larger than the inner diameter of the guide column cavity 19, and the support ring guide groove 18 is connected with the guide column cavity 19; the annular inner surface of the sealing ring 17 and the outer surface of the main core shaft 2 are spaced apart to form an annular extrusion cavity 2, and the lower end of the guide column cavity 19 is connected with the lower flow channel through the extrusion cavity 2.

[0041] In the present application, the middle section support member can not only provide stable support for the main core shaft 2 and the forming die 4, but also play a role in slowing down the flow. The secondary slowing down of the molten material flow by the middle section support member can further improve the uniformity of the molten material flow velocity and the uniformity of fusion, and further prevent the occurrence of welding marks.

[0042] An annular extrusion protrusion ring 20 is arranged on the annular inner surface of the sealing ring 17, and the annular inner surface of the extrusion protrusion ring 20 is spaced apart from the outer surface of the main core shaft 2; the distance between the inner ring surface at the upper end of the sealing ring 17 and the outer surface of the main core shaft 2 is greater than the distance between the inner ring surface at the lower end of the sealing ring 17 and the outer surface of the middle section of the main core shaft 2, and the distance between the inner ring surface at the lower end of the sealing ring 17 and the outer surface of the main core shaft 2 is greater than the distance between the extrusion protrusion ring 20 and the outer surface of the main core shaft 2.

[0043] In the present application, the pressure of the molten material flow is increased by the extrusion limiting effect of the extrusion protrusion ring 20, so that the molten material flow entering the flow channel space between the sealing ring 17 and the main core shaft 2 is fully mixed, thereby preventing and eliminating the welding mark on the surface of the ampoule bottle.

[0044] The opening area of ​​the upper end opening of the lower flow channel is larger than the opening area of ​​the lower end opening of the lower flow channel. The middle section of the lower flow channel is provided with an annular flow-stabilizing protrusion ring 21. The flow-stabilizing protrusion ring 21 is provided on the outer ring surface of the middle section of the main core shaft 2 which is sleeved on the inside of the molding die 4. The outer ring surface of the flow-stabilizing protrusion ring 21 is spaced apart from the inner surface of the molding die 4.

[0045] In the present application, the opening area of ​​the upper opening of the lower flow channel is larger than the opening area of ​​the lower opening of the lower flow channel. The molten material flow through the lower flow channel is extruded through the lower flow channel to further improve the fusion uniformity. The function of the flow stabilizing protrusion ring 21 is the same as that of the extrusion protrusion ring 20, so that the molten material flow is fully mixed, thereby eliminating the welding marks on the surface of the ampoule bottle.

[0046] The middle section of the second semi-annular flow channel is communicated with the longitudinal flow channel, and both ends of the second semi-annular flow channel are respectively communicated with two symmetrical sides in the extrusion ring 14 .

[0047] In the present application, the semi-annular flow channel 2 of the diverter ring evenly divides the molten material flow into two streams, and evenly feeds the material flow into the cavity between the extrusion ring 14 and the main core shaft 2, so that the material flow can be evenly mixed between the extrusion ring 14 and the main core shaft 2, thereby eliminating the welding marks on the surface of the ampoule bottle.

[0048] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A flow regulating device for a tube blank vacuum forming mold, characterized in that: The invention comprises a tube embryo blister mold body (1), wherein a hollow tubular main core shaft (2) is arranged in the tube embryo blister mold body (1), a blister tube (3) is arranged in the main core shaft (2), and the blister tube (3) is sleeved in the main core shaft (2) and arranged coaxially with the main core shaft (2); the lower end of the main core shaft (2) protrudes from the lower end surface of the tube embryo blister mold body (1), the lower end of the tube embryo blister mold body (1) is fixedly connected with an internal hollow molding die (4), the lower end of the main core shaft (2) is sleeved in the molding die (4), and a spacing is arranged between the lower section outer surface of the main core shaft (2) and the inner surface of the molding die (4). A lower flow channel is formed; a drainage ring (6) is sleeved on the middle section of the main core shaft (2); a feed port (8) is arranged on the side of the tube embryo blister mold body (1); a longitudinal flow channel is arranged in the drainage ring (6); one end of the longitudinal flow channel in the drainage ring (6) is connected to the feed port (8); the lower flow channel between the outer surface of the lower section of the main core shaft (2) and the inner surface of the molding die (4) is connected to the other end of the longitudinal flow channel; a flow regulating screw (9) is arranged on the side of the tube embryo blister mold body (1); the end of the flow regulating screw (9) is inserted into the longitudinal flow channel on the drainage ring (6) and is threadedly connected to the drainage ring (6); The side of the tube embryo blister mold body (1) is provided with a guide sleeve (12) and a pressing block (13); the guide sleeve (12) is inserted into the tube embryo blister mold body (1); one end of the pressing block (13) is inserted into the side of the tube embryo blister mold body (1) and is in tight contact with the end of the guide sleeve (12); the flow regulating screw (9) passes through the guide sleeve (12) and the pressing block (13) and is threadedly connected with the pressing block (13); the diameter of the end of the flow regulating screw (9) is larger than the inner diameter of the longitudinal flow channel, and when the end of the flow regulating screw (9) contacts the inner side surface of the longitudinal flow channel, the flow regulating screw (9) blocks the longitudinal flow channel; The opening area of ​​the upper end opening of the lower flow channel is larger than the opening area of ​​the lower end opening of the lower flow channel. The middle section of the lower flow channel is provided with an annular flow stabilizing protrusion ring (21). The flow stabilizing protrusion ring (21) is arranged on the outer ring surface of the middle section of a section of the main core shaft (2) sleeved on the inside of the forming die (4). The outer ring surface of the flow stabilizing protrusion ring (21) is spaced apart from the inner surface of the forming die (4).

2. The flow regulating device for tube blank vacuum molding according to claim 1 is characterized in that: The middle section of the main core shaft (2) is sleeved with an upper sleeve (5) and a diverter ring (7), and the diverter ring (6) is located between the upper sleeve (5) and the diverter ring (7); the lower end surface of the upper sleeve (5) and the upper end surface of the diverter ring (6) are respectively provided with a semi-circular groove one (10), the lower end surface of the upper sleeve (5) and the groove one (10) of the diverter ring (6) are connected to form a semi-circular flow channel one, and the two ends of the semi-circular flow channel one are respectively connected to the feed port (8) and the longitudinal flow channel; the lower end surface of the diverter ring (6) and the upper end surface of the diverter ring (7) are respectively provided with a semi-circular groove two (11), the lower end surface of the diverter ring (6) and the groove two (11) of the upper end surface of the diverter ring (7) are connected to form a semi-circular flow channel two, and the lower flow channel and the longitudinal flow channel are connected to the semi-circular flow channel two.

3. The flow regulating device for tube blank vacuum molding according to claim 1, characterized in that: The end of the flow regulating screw (9) is in the shape of a ball head arc, and a groove matching the shape of the end of the flow regulating screw (9) is provided on the side wall of the longitudinal flow channel; the flow regulating screw (9) is provided with two spaced-apart raised limit sections (91), and the two raised limit sections (91) are respectively located on both sides of the pressing block (13).

4. The flow rate regulating device for tube blank vacuum molding according to claim 2 is characterized in that: The middle section of the main core shaft (2) is sleeved with an extrusion ring (14), the extrusion ring (14) is located below the diverter ring (7) and is in close contact with the diverter ring (7), and the annular inner surface of the extrusion ring (14) and the outer surface of the main core shaft (2) are spaced apart to form an annular extrusion cavity; An annular extrusion protrusion ring (15) is arranged on the annular inner surface of the extrusion ring (14), and the annular inner surface of the extrusion protrusion ring (15) is spaced from the outer surface of the main core shaft (2); the distance between the inner ring surface at the upper end of the extrusion ring (14) and the outer surface of the middle section of the main core shaft (2) is greater than the distance between the inner ring surface at the lower end of the extrusion ring (14) and the outer surface of the middle section of the main core shaft (2), and the distance between the inner ring surface at the lower end of the extrusion ring (14) and the outer surface of the middle section of the main core shaft (2) is greater than the distance between the extrusion protrusion ring (15) and the outer surface of the middle section of the main core shaft (2).

5. The flow rate regulating device for tube blank vacuum molding according to claim 2, characterized in that: The main core shaft (2) is located between the diverter ring (7) and the molding die (4) and is spaced apart from the inner wall of the tube embryo blister mold body (1); a middle section support member is sleeved on the main core shaft (2) to support the distance between the main core shaft (2) and the inner wall of the tube embryo blister mold body (1); the middle section support member is annular, and the annular inner wall of the middle section support member is in contact with the outer surface of the main core shaft (2), and the annular outer wall of the middle section support member is in contact with the inner wall of the tube embryo blister mold body (1).

6. The flow rate regulating device for tube blank vacuum molding according to claim 5, characterized in that: The middle section support member comprises a support ring (151), a second diverter ring (16) and a sealing ring (17); the support ring (151), the second diverter ring (16) and the sealing ring (17) are sleeved on the main core shaft (2) in sequence; the support ring (151) is provided with a plurality of support ring guide grooves (18) penetrating the support ring (151) along a direction extending in parallel with the length of the main core shaft (2); the second diverter ring (16) is provided with a plurality of guide grooves penetrating the second diverter ring (16) along a direction extending in parallel with the length of the main core shaft (2) The support ring guide groove (18) has an arc-shaped cross section along a direction perpendicular to the length extension of the main core shaft (2); the opening area of ​​the lower end of the support ring guide groove (18) is larger than the inner diameter of the guide column cavity (19); the support ring guide groove (18) is connected to the guide column cavity (19); the annular inner surface of the sealing ring (17) and the outer surface of the main core shaft (2) are spaced apart to form an annular extrusion cavity 2; the lower end of the guide column cavity (19) is connected to the lower flow channel through the extrusion cavity 2.

7. The flow rate regulating device for tube blank vacuum molding according to claim 6, characterized in that: The annular inner surface of the sealing ring (17) is provided with an annular extrusion protrusion ring 2 (20), and the annular inner surface of the extrusion protrusion ring 2 (20) is spaced apart from the outer surface of the main core shaft (2); the spacing between the inner ring surface at the upper end of the sealing ring (17) and the outer surface of the main core shaft (2) is greater than the spacing between the inner ring surface at the lower end of the sealing ring (17) and the outer surface of the middle section of the main core shaft (2), and the spacing between the inner ring surface at the lower end of the sealing ring (17) and the outer surface of the main core shaft (2) is greater than the spacing between the extrusion protrusion ring 2 (20) and the outer surface of the main core shaft (2).

8. The flow rate regulating device for tube blank vacuum molding according to claim 4 is characterized in that: The middle section of the second semi-annular flow channel is connected to the longitudinal flow channel, and the two ends of the second semi-annular flow channel are respectively connected to two symmetrical sides in the extrusion ring (14).

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