Pressing ring mechanism of plastic suction mold
By setting a pressure regulating chamber in the blister mold and using the pressure of the press spring, the problem that the prior art cannot produce thin cup mouths or bowl mouths is solved, and flexible thickness adjustment and more efficient molding process are achieved.
Patent Information
- Application Number
- CN202421748926.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-23
AI Technical Summary
When forming plastic bowls or cups, existing thermoforming molds cannot make cup mouths or bowl mouths with thinner thickness, and the thickness of cup mouths or bowl mouths cannot be adjusted as needed.
A pressing ring mechanism for blister mold is designed. By setting a pressure regulating chamber in the upper mold and injecting compressed air with the upper vent hole, combined with the force of the pressing spring, the pressure on the cup mouth or bowl mouth is increased, thereby achieving a thinner cup mouth or bowl mouth. In addition, by adjusting the injected compressed air volume, the pressure of the pressure ring is dynamically adjusted, and the thickness of the cup mouth or bowl mouth is adjusted.
The thinner cup or bowl mouth is achieved and the thickness is adjusted as needed, improving the flexibility and efficiency of the molding process.
Smart Images
Figure CN222792743U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plastic blister moulds, in particular to a pressing ring mechanism of a plastic blister mould. Background Art
[0002] At present, the existing thermoforming mold for forming plastic bowls or cups, as shown in the utility model patent with application number 2015203606831, includes an upper mold and a lower mold, the upper mold includes an upper mold body, an upper shearing mold arranged in the upper mold body, a press ring and a stretching head, and the upper mold body is provided with a press air channel, one end of which is connected to an external air source and the other end acts on the top surface of the press ring, the lower mold includes a lower mold body and a lower shearing mold arranged in the lower mold body, and is characterized in that a press spring is arranged between the top surface of the press ring and the top of the upper mold. Compared with the prior art, the beneficial effect of the utility model is that due to the addition of a press spring, the press spring presses the press ring, so that the press force is greatly increased, so that the air leakage caused by insufficient press force can be effectively avoided.
[0003] However, the thickness of the cup mouth or bowl mouth formed by the above-mentioned structure using the pressing spring is relatively large, and a cup mouth or bowl mouth with a thinner thickness cannot be produced, and the thickness of the cup mouth or bowl mouth cannot be adjusted as needed. Utility Model Content
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a pressing ring mechanism that can produce a thinner cup mouth or bowl mouth and can adjust the thickness of the cup mouth or bowl mouth as needed.
[0005] The purpose of the utility model can be achieved through the following technical solutions:
[0006] A pressure ring mechanism of a blister mold, comprising a fixed shaft, a pressure ring and a lower blade, wherein the lower blade is fixed to the periphery of the lower cavity of the lower mold, the pressure ring is arranged in the upper cavity of the upper mold, the upper end of the pressure ring is fixedly connected to the fixed shaft, the pressure ring and the fixed shaft can move vertically with the upper mold and the lower end surface of the pressure ring can abut against the upper end surface of the lower blade, the pressure ring and the fixed shaft can reciprocate vertically relative to the upper mold, and the characteristic is that: a pressure regulating cavity with an upper opening is formed in the upper mold, and the upper end of the pressure regulating cavity A pneumatic cover plate capable of sealing the opening is provided, a pneumatic bottom plate is provided in the pressure regulating chamber, the outer peripheral surface of the pneumatic bottom plate is sealed and movably connected to the inner surface of the pressure regulating chamber, the fixed shaft passes through the pneumatic cover plate, the pneumatic bottom plate and the pressure regulating chamber, the pneumatic bottom plate is fixedly connected to the fixed shaft and can move up and down following the fixed shaft, an upper air vent is provided at the upper part of the pressure regulating chamber, a lower air vent is provided at the lower part of the pressure regulating chamber, and a pressing spring for driving the pneumatic bottom plate to move downward is provided between the pneumatic cover plate and the pneumatic bottom plate.
[0007] The ring pressing mechanism provides a pressure regulating chamber in the upper mold, and compressed air can be injected into the pressure regulating chamber through the upper air vent. Combined with the force of the pressing spring itself, the pressure applied by the ring pressing on the rim of the cup or the rim of the bowl is greater, thereby obtaining a thinner rim of the cup or the rim of the bowl; further, the pressure of the ring pressing can be dynamically adjusted by adjusting the amount of compressed air injected, so that the ring pressing mechanism can adjust the thickness of the rim of the cup or the rim of the bowl as needed.
[0008] In the above-mentioned pressing ring mechanism of the blister mold, the lower vent hole is arranged on the bottom surface of the regulating cavity, and a lower gas channel communicating with the lower vent hole is arranged in the upper mold.
[0009] The design of the lower air vent enables the air on the lower side of the air pressure bottom plate to be discharged smoothly through the lower air vent when the air pressure bottom plate moves downward, thereby preventing the air on the lower side of the air pressure bottom plate from being compressed and exerting an upward force on the air pressure bottom plate, thereby helping to increase the pressure exerted by the pressure ring on the rim of the cup or bowl, so that the rim of the cup or bowl can be pressed thinner.
[0010] In the above-mentioned pressing ring mechanism of a blister mold, the upper air vent is arranged on the side wall of the adjusting cavity, and an upper gas channel connected to the upper air vent is arranged in the upper mold, and the distance H1 between the upper side surface of the pressing ring and the upper side wall of the upper cavity is smaller than the distance H2 between the lower side surface of the air pressure bottom plate and the lower edge of the upper air vent.
[0011] The upper air vent in the pressing ring mechanism is mainly used to inject compressed air into the pressure regulating cavity, so as to adjust the downward force exerted on the air pressure base plate, and then transmit the downward force to the pressing ring through the fixed shaft, thereby increasing the pressure exerted by the pressing ring on the rim of the cup or the rim of the bowl, so that the rim of the cup or the rim of the bowl can be pressed thinner; the setting of the above-mentioned distance H1 being smaller than the distance H2 can avoid that when the upper mold and the lower mold are close, when the pressing ring resists the pressure of the pressing spring until it abuts against the upper side wall of the upper cavity, if the lower side of the air pressure base plate is located above the lower edge of the upper air vent, the upper air vent will also inject compressed air into the lower side of the air pressure base plate, which cannot play a role in increasing the downward pressure of the air pressure base plate. Therefore, the above-mentioned limitation that H1 is smaller than H2 can ensure that the pressing ring mechanism can operate smoothly, which is beneficial to improving its stability during use.
[0012] In the above-mentioned pressing ring mechanism of a blister mold, the middle and upper part of the regulating cavity is expanded to form an air inlet groove, the upper air vent is arranged at the bottom of the air inlet groove, the distance H1 between the upper side surface of the pressing ring and the upper side wall of the upper cavity is equal to the distance H3 between the lower side surface of the air inlet groove and the bottom surface of the regulating cavity.
[0013] The design of the above-mentioned air inlet groove can avoid the upper air vent from directly abutting against the outer side wall of the air pressure base plate. Even when the upper and lower molds are approaching, when the pressure ring resists the pressure of the pressure spring until it abuts against the upper side wall of the upper cavity, the upper side surface of the air pressure base plate moves to a position relative to the upper middle part of the upper air vent. The compressed air can also pass through the upper air vent first into the air inlet groove, and then into the pressure regulating cavity on the upper side of the air pressure base plate, thereby ensuring unobstructed air intake through the upper air vent and improving the working stability of the pressure ring mechanism.
[0014] In the above-mentioned pressure ring mechanism of a blister mold, a first annular sealing groove is arranged on the outer peripheral surface of the air pressure bottom plate, a sealing ring is installed in the first sealing groove, and a cylindrical connecting part is formed upward on the upper side of the air pressure bottom plate, and the connecting part is sleeved on the outer side of the fixed shaft.
[0015] The above-mentioned first sealing groove and sealing ring cooperate to ensure better sealing between the outer circumferential surface of the pneumatic base plate and the inner circumferential wall of the pressure regulating chamber. The design of the connecting sleeve can make the connection between the pneumatic base plate and the fixed shaft more stable, avoiding deflection between the pneumatic base plate and the connecting shaft during operation, which may cause the pneumatic base plate to tilt, and is beneficial to improving the stability of the sealed connection between the outer circumferential surface of the pneumatic base plate and the pressure regulating chamber.
[0016] In the above-mentioned pressing ring mechanism of a blister mold, the upper end of the fixed shaft is threadedly connected with a locking nut, the lower end face of the locking nut abuts against the upper end face of the connecting part, and an annular protrusion is formed on the fixed shaft; an annular groove is provided on the lower side face of the pneumatic bottom plate, and an adjusting sleeve is installed in the annular groove, one end of the adjusting sleeve abuts against the bottom of the annular groove, and the other end abuts against the upper side face of the annular protrusion.
[0017] The locking nut, the adjusting sleeve and the annular protrusion on the fixed shaft cooperate to firmly fix the air pressure base plate on the fixed shaft; the relative position between the air pressure base plate and the pressing ring can be adjusted by using adjusting sleeves of different heights, thereby ensuring that the compressed air can smoothly enter the pressure regulating cavity on the upper side of the air pressure base plate when pressing the material.
[0018] In the above-mentioned pressing ring mechanism of a blister mold, a connecting hole is arranged between the pressure regulating cavity and the upper cavity to connect the two, the fixed shaft passes through the connecting hole, and a limiting convex ring protruding inward is formed at the lower end of the connecting hole. A guide sleeve is tightly connected in the connecting hole, and the lower end of the guide sleeve abuts against the limiting convex ring. The outer circumferential surface of the annular protrusion of the fixed shaft is connected to the inner circumferential surface of the guide sleeve, and a second sealing groove is provided on the outer circumferential surface of the annular protrusion, and a sealing ring is installed in the second sealing groove.
[0019] The design of the above-mentioned limiting convex ring and guide sleeve can prevent the fixed shaft from directly contacting the hole wall of the connecting hole. With the long-term operation of the pressing ring mechanism, the reciprocating movement between the fixed shaft and the connecting hole will inevitably cause wear. The hardness of the fixed shaft is relatively high and the degree of wear is relatively light, while the hardness of the upper mold is relatively poor compared to the fixed shaft. Therefore, if the connecting hole is in direct contact with the fixed shaft, more serious wear will occur, which will cause the fixed shaft to tilt, affecting the accuracy and air tightness. After the connecting hole is worn, the entire upper mold needs to be replaced, and the replacement cost is high and the difficulty is great. The pressing ring mechanism sets a guide sleeve with higher hardness in the connecting hole so that the guide sleeve is in direct contact with the fixed shaft. Even if the guide sleeve is severely worn, it only needs to be replaced with a new one. It is easy to replace and the cost is low. The design of the second sealing groove and the sealing ring can ensure better sealing between the annular protrusion of the fixed shaft and the inner wall of the guide sleeve.
[0020] In the above-mentioned pressing ring mechanism of a blister mold, a spring positioning groove is provided on the lower side of the air pressure cover plate, the pressing spring is sleeved on the outside of the connecting part, the upper end of the pressing spring is inserted into the spring positioning groove, and the lower end of the pressing spring is in contact with the upper side of the air pressure bottom plate.
[0021] The design of the spring positioning groove can make the pressure spring more stable after installation, so that it can produce a more stable pressure on the air pressure bottom plate, which is convenient for cooperating with the upper vent hole to provide corresponding pressure according to production needs, thereby obtaining the required cup mouth thickness or bowl mouth thickness.
[0022] In the above-mentioned pressing ring mechanism of a blister mold, the air pressure cover plate is threadedly connected to the opening of the pressure regulating chamber, and the outer side wall of the air pressure cover plate is formed with a mounting convex ring protruding outward, and the lower side surface of the mounting convex ring can abut against the upper side surface of the upper mold, and the lower side surface of the mounting convex ring is provided with a third sealing groove, and a sealing ring is installed in the third sealing groove.
[0023] The threaded connection between the air pressure cover plate and the opening of the pressure regulating chamber has the advantages of simple structure and stable connection; the design of the mounting convex ring can not only play a limiting role, but the design of the third sealing groove and the sealing ring can also play a better sealing role, which is beneficial to improving the sealing performance of the pressure regulating chamber.
[0024] In the above-mentioned pressing ring mechanism of a blister mold, the lower cutting edge is annular, and the lower cutting edge is fixedly connected to the lower mold through a pressing plate. The outer side of the pressing ring is sleeved with an upper cutting edge, and there is a gap between the outer wall of the pressing ring and the inner wall of the upper cutting edge. The upper cutting edge is fixedly connected to the upper mold, and the inner peripheral wall of the upper cutting edge can be movably fitted with the outer peripheral wall of the lower cutting edge or have a small gap, and a guide surface with an inner high and an outer low is provided on the upper side surface of the lower cutting edge.
[0025] The upper and lower blades can cooperate to complete the cutting action, and the design of the guide surface of the lower blade can play a guiding role. Even if the upper and lower blades are not completely aligned, they can cooperate to complete the cutting action under the action of the guide surface, and the stability and safety are higher. In actual operation, after the blister mold is blister-formed and the cup mouth or bowl mouth is pressed to the required thickness, the upper vent stops injecting compressed air into the pressure regulating chamber and switches to the open state so that the gas in the pressure regulating chamber can be discharged from the pressure regulating chamber through the upper vent. At this time, the upper mold moves down to make the upper and lower blades close and staggered to achieve the cutting action; at the same time, the lower vent injects compressed air into the pressure regulating chamber to reset the air pressure bottom plate, and finally the upper mold and the lower mold are separated and reset.
[0026] Compared with the prior art, the technical effects of the utility model are:
[0027] 1. The utility model provides a pressure regulating cavity in the upper die, and compressed air can be injected into the pressure regulating cavity through the upper vent hole. Combined with the force of the pressing spring itself, the pressure exerted by the pressing ring on the cup mouth or bowl mouth is greater, thereby obtaining a thinner cup mouth or bowl mouth;
[0028] 2. The utility model dynamically adjusts the pressure of the pressing ring by adjusting the amount of compressed air injected, so that the pressing ring mechanism can adjust the thickness of the cup mouth or bowl mouth of the prepared cup as required. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a schematic diagram of the overall structure of the plastic blister mold of the utility model.
[0030] Figure 2 It is an overall cross-sectional view of the blister of the utility model.
[0031] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.
[0032] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle.
[0033] Figure 5 It is a cross-sectional view and a partial enlarged view of the upper gas channel of the utility model.
[0034] Figure 6 It is a partial enlarged view of the pressure regulating chamber of the utility model.
[0035] Figure 7 The utility model is a schematic diagram of the connection structure of the fixed shaft, the pressing ring, the lower blade and the pressing plate.
[0036] Figure 8 It is a schematic diagram of the exploded structure of the pressing ring, the upper cutting edge, the pressing plate and the lower cutting edge of the utility model.
[0037] Fig. 9 It is a structural schematic diagram of the fixed shaft of the utility model.
[0038] Fig.10 It is a structural schematic diagram of the air pressure bottom plate of the utility model.
[0039] In the figure, 1, upper mold; 11, upper cavity; 12, pressure regulating cavity; 121, upper vent; 122, lower vent; 123, air inlet groove; 13, upper gas channel; 14, lower gas channel; 15, connecting hole; 151, limiting convex ring; 16, guide sleeve; 2, lower mold; 21, lower cavity; 22, pressure plate; 3, fixed shaft; 31, locking nut; 32, annular protrusion; 321, second sealing groove; 4, pressure ring; 5, lower blade; 51, guide surface; 6, air pressure cover plate; 61, spring positioning groove; 62, mounting convex ring; 621, third sealing groove; 7, air pressure bottom plate; 71, first sealing groove; 72, connecting part; 73, annular groove; 74, adjusting sleeve; 8, pressing spring; 9, upper blade. DETAILED DESCRIPTION
[0040] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0041] The pressing ring 4 mechanism of the present blister mold comprises a fixed shaft 3, a pressing ring 4 and a lower blade 5, the lower blade 5 is fixed to the periphery of the lower cavity 21 of the lower mold 2, the pressing ring 4 is arranged in the upper cavity 11 of the upper mold 1, the upper end of the pressing ring 4 is fixedly connected with the fixed shaft 3, the pressing ring 4 and the fixed shaft 3 can move vertically with the upper mold 1 and the lower end surface of the pressing ring 4 can abut against the upper end surface of the lower blade 5, the pressing ring 4 and the fixed shaft 3 can reciprocate vertically relative to the upper mold 1, a pressure regulating cavity 12 with an upper opening is formed in the upper mold 1, and the upper end of the pressure regulating cavity 12 is provided with a pressure regulating cavity 12 that can The air pressure cover plate 6 with an open seal is provided with an air pressure bottom plate 7 in the pressure regulating chamber 12. The outer peripheral surface of the air pressure bottom plate 7 is sealed and movably connected to the inner surface of the pressure regulating chamber 12. The fixed shaft 3 passes through the air pressure cover plate 6, the air pressure bottom plate 7 and the pressure regulating chamber 12. The air pressure bottom plate 7 is fixedly connected to the fixed shaft 3 and can move up and down with the fixed shaft 3. An upper air vent 121 is provided at the upper part of the pressure regulating chamber 12, and a lower air vent 122 is provided at the lower part of the pressure regulating chamber 12. A pressing spring 8 is provided between the air pressure cover plate 6 and the air pressure bottom plate 7 to drive the air pressure bottom plate 7 to move downward. The pressing ring 4 mechanism provides a pressure regulating chamber 12 in the upper mold 1, and compressed air can be injected into the pressure regulating chamber 12 through the upper air vent 121. Combined with the force of the pressing spring 8 itself, the pressing ring 4 can apply greater pressure to the cup mouth or bowl mouth, thereby obtaining a thinner cup mouth or bowl mouth; further, the pressure of the pressing ring 4 can be dynamically adjusted by adjusting the amount of compressed air injected, so that the pressing ring 4 mechanism can adjust the thickness of the cup mouth of the prepared cup or bowl mouth as needed.
[0042] Furthermore, the lower vent hole 122 is provided on the bottom surface of the adjustment cavity, and the upper mold 1 is provided with a lower gas channel 14 connected with the lower vent hole 122. The design of the lower vent hole 122 enables the air at the lower side of the air pressure bottom plate 7 to be discharged smoothly through the lower vent hole 122 when the air pressure bottom plate 7 moves downward, thereby preventing the air at the lower side of the air pressure bottom plate 7 from being compressed and exerting an upward force on the air pressure bottom plate 7, thereby facilitating the increase of the pressure exerted by the pressing ring 4 on the cup mouth or bowl mouth, so that the cup mouth or bowl mouth can be pressed thinner.
[0043] like Figure 1-6As shown, the upper air vent 121 is arranged on the side wall of the regulating cavity, and the upper gas channel 13 connected with the upper air vent 121 is arranged in the upper mold 1, and the distance H1 between the upper side surface of the pressing ring 4 and the upper side wall of the upper cavity 11 is smaller than the distance H2 between the lower side surface of the air pressure bottom plate 7 and the lower edge of the upper air vent 121; the middle and upper part of the regulating cavity is expanded to form an air inlet groove 123, and the upper air vent 121 is arranged at the bottom of the air inlet groove 123, and the distance H1 between the upper side surface of the pressing ring 4 and the upper side wall of the upper cavity 11 is equal to the distance H3 between the lower side surface of the air inlet groove 123 and the bottom surface of the regulating cavity. The upper air vent 121 in the present pressing ring 4 mechanism is mainly used for injecting compressed air into the pressure regulating chamber 12, so as to adjust the downward force exerted on the air pressure bottom plate 7, and then transmit the downward force to the pressing ring 4 through the fixed shaft 3, thereby increasing the pressure exerted by the pressing ring 4 on the mouth of the cup or the mouth of the bowl, so that the mouth of the cup or the mouth of the bowl can be pressed thinner; the setting of the above-mentioned distance H1 being smaller than the distance H2 can avoid that when the upper mold 1 and the lower mold 2 are close, when the pressing ring 4 resists the pressure of the pressing spring 8 until it abuts against the upper side wall of the upper cavity 11, if the lower side surface of the air pressure bottom plate 7 is located above the lower edge of the upper air vent 121, the upper air vent 121 will also inject compressed air into the lower side of the air pressure bottom plate 7, which cannot play a role in increasing the downward pressure of the air pressure bottom plate 7. Therefore, the above-mentioned limitation that H1 is smaller than H2 can ensure that the present pressing ring 4 mechanism can operate smoothly, which is beneficial to improving its stability during use. The design of the above-mentioned air inlet groove 123 can prevent the upper air vent 121 from directly abutting against the outer side wall of the pneumatic base plate 7. Even during the approach process of the upper mold 1 and the lower mold 2, when the pressure ring 4 resists the pressure of the pressure spring 8 until it abuts against the upper side wall of the upper cavity 11, the upper side surface of the pneumatic base plate 7 moves to a position relative to the upper middle part of the upper air vent 121, and the compressed air can also pass through the upper air vent 121 to first enter the air inlet groove 123, and then enter the pressure regulating cavity 12 on the upper side of the pneumatic base plate 7, thereby ensuring that the upper air vent 121 has unobstructed air intake and improving the working stability of the pressure ring 4 mechanism.
[0044] like Figure 3 and Fig.10 As shown, an annular first sealing groove 71 is provided on the outer circumference of the air pressure bottom plate 7, a sealing ring is installed in the first sealing groove 71, and a cylindrical connecting portion 72 is formed upward on the upper side of the air pressure bottom plate 7, and the connecting portion 72 is sleeved on the outer side of the fixed shaft 3. The above-mentioned first sealing groove 71 and the sealing ring cooperate to ensure good sealing between the outer circumference of the air pressure bottom plate 7 and the inner circumference of the pressure regulating chamber 12. The design of the connecting sleeve can make the connection between the air pressure bottom plate 7 and the fixed shaft 3 more stable, avoid the deflection between the air pressure bottom plate 7 and the connecting shaft during the working process, and cause the air pressure bottom plate 7 to tilt, which is conducive to improving the stability of the sealed connection between the outer circumference of the air pressure bottom plate 7 and the pressure regulating chamber 12.
[0045] like Figure 3 and Figure 7As shown, the upper end of the fixed shaft 3 is threadedly connected with a locking nut 31, the lower end surface of the locking nut 31 abuts against the upper end surface of the connecting portion 72, and an annular protrusion 32 is formed on the fixed shaft 3; an annular groove 73 is provided on the lower side surface of the air pressure bottom plate 7, and an adjusting sleeve 74 is installed in the annular groove 73, one end of the adjusting sleeve 74 abuts against the groove bottom of the annular groove 73, and the other end abuts against the upper side surface of the annular protrusion 32; a connecting hole 15 is provided between the pressure regulating cavity 12 and the upper cavity 11 to connect the two, the fixed shaft 3 passes through the connecting hole 15, and a limiting convex ring 151 protruding inward is formed at the lower end of the connecting hole 15, and a guide sleeve 16 is tightly connected in the connecting hole 15, and the lower end of the guide sleeve 16 abuts against the limiting convex ring 151, the outer peripheral surface of the annular protrusion 32 of the fixed shaft 3 is connected to the inner peripheral surface of the guide sleeve 16, and a second sealing groove 321 is provided on the outer peripheral surface of the annular protrusion 32, and a sealing ring is installed in the second sealing groove 321. The lock nut 31, the adjusting sleeve 74 and the annular protrusion 32 on the fixed shaft 3 cooperate to firmly fix the air pressure bottom plate 7 on the fixed shaft 3; the adjusting sleeve 74 of different heights can adjust the relative position between the air pressure bottom plate 7 and the pressing ring 4, so as to ensure that the compressed air can smoothly enter the pressure regulating cavity 12 on the upper side of the air pressure bottom plate 7 when pressing the material; the design of the limiting convex ring 151 and the guide sleeve 16 can prevent the fixed shaft 3 from directly contacting the hole wall of the connecting hole 15. With the long-term operation of the pressing ring 4 mechanism, the reciprocating movement between the fixed shaft 3 and the connecting hole 15 will inevitably cause wear, and the fixed The hardness of the shaft 3 is relatively high, and the degree of wear is relatively light, while the hardness of the upper mold 1 is relatively poor compared to the fixed shaft 3. Therefore, if the connecting hole 15 is in direct contact with the fixed shaft 3, more serious wear will occur, which will cause the fixed shaft 3 to tilt, affecting the accuracy and air tightness. After the connecting hole 15 is worn, the entire upper mold 1 needs to be replaced, and the replacement cost is high and the difficulty is great. The pressure ring 4 mechanism sets a guide sleeve 16 with higher hardness in the connecting hole 15, so that the guide sleeve 16 is in direct contact with the fixed shaft 3. Even if the guide sleeve 16 is severely worn, it only needs to be replaced with a new one. It is easy to replace and the cost is low. The design of the second sealing groove 321 and the sealing ring can ensure good sealing between the annular protrusion 32 of the fixed shaft 3 and the inner wall of the guide sleeve 16.
[0046] like Figure 3 As shown, a spring positioning groove 61 is provided on the lower side of the air pressure cover plate 6, the press spring 8 is sleeved on the outer side of the connecting portion 72, the upper end of the press spring 8 is inserted into the spring positioning groove 61, and the lower end of the press spring 8 abuts against the upper side of the air pressure bottom plate 7. The design of the spring positioning groove 61 can make the press spring 8 more stable after installation, so that it can generate a relatively stable pressure on the air pressure bottom plate 7, which is convenient for cooperating with the upper vent hole 121 to provide corresponding pressure according to production needs, so as to obtain the required cup mouth thickness or bowl mouth thickness.
[0047] Furthermore, the air pressure cover plate 6 is threadedly connected to the opening of the pressure regulating chamber 12, and the outer side wall of the air pressure cover plate 6 is formed with a mounting convex ring 62 protruding outward, and the lower side of the mounting convex ring 62 can abut against the upper side of the upper mold 1, and the lower side of the mounting convex ring 62 is provided with a third sealing groove 621, and a sealing ring is installed in the third sealing groove 621. The threaded connection between the air pressure cover plate 6 and the opening of the pressure regulating chamber 12 has the advantages of simple structure and stable connection; the design of the mounting convex ring 62 can not only play a limiting role, but also the design of the third sealing groove 621 and the sealing ring can play a good sealing role, which is conducive to improving the sealing performance of the pressure regulating chamber 12.
[0048] like Figure 4 As shown, the lower blade 5 is annular, and the lower blade 5 is fixedly connected to the lower die 2 through the pressing plate 22. The upper blade 9 is sleeved on the outer side of the pressing ring 4, and there is a gap between the outer wall of the pressing ring 4 and the inner wall of the upper blade 9. The upper blade 9 is fixedly connected to the upper die 1, and the inner peripheral wall of the upper blade 9 can be movably fitted with the outer peripheral wall of the lower blade 5 or have a small gap. A guide surface 51 with a high inside and a low outside is provided on the upper side surface of the lower blade 5. The upper blade 9 and the lower blade 5 can cooperate to complete the cutting action, and the design of the guide surface 51 of the lower blade 5 can play a guiding role. Even if the upper blade 9 and the lower blade 5 are not completely aligned, they can cooperate to complete the cutting action under the action of the guide surface 51, and the stability and safety are higher. In actual operation, after the blister mold is formed and the mouth of the cup or bowl is pressed to the required thickness, the upper air vent 121 stops injecting compressed air into the pressure regulating chamber 12 and switches to an open state so that the gas in the pressure regulating chamber 12 can be discharged from the pressure regulating chamber 12 through the upper air vent 121. At this time, the upper mold 1 moves downward to make the upper blade 9 and the lower blade 5 close to and intertwined to achieve the cutting action; at the same time, the lower air vent 122 injects compressed air into the pressure regulating chamber 12 to reset the air pressure bottom plate 7, and finally the upper mold 1 and the lower mold 2 are separated and reset.
[0049] The plastic suction mold comprises an upper mold 1 and a lower mold 2, which are connected by matching guide pins and guide sleeves, and the upper mold 1 and the lower mold 2 are connected with a driving member for driving the two to close or separate the molds; an upper cavity 11 is arranged in the upper mold 1, and a lower cavity 21 is arranged in the lower mold 2, a plunger is arranged in the upper cavity 11, and the plunger is connected to a plunger plate on the upper side of the upper mold 1 through a plunger rod, and the plunger plate is connected with a plunger driving member for driving it to move up and down, the lower end of the pressure ring 4 is open, the pressure ring 4 is wrapped around the outside of the plunger, and the fixed shaft 3 is sleeved on the outside of the plunger rod, the pressure ring 4 can move relative to the plunger, and the fixed shaft 3 and the plunger rod can also move axially relative to each other; a copper head is arranged in the lower cavity 21, and the lower end of the copper head is connected to a copper head rod, and the lower end of the copper head rod is connected to a copper head plate, and the copper head plate is connected to a copper head driving member for driving it to move up and down.
[0050] The working principle of the press ring 4 mechanism is as follows:
[0051] In the initial state, the air pressure bottom plate 7 is located at the bottom of the pressure regulating chamber 12 under the action of the material pressing spring 8;
[0052] During the closing process of the upper mold 1 and the lower mold 2, the pressing ring 4 and the lower blade 5 first approach and cooperate to fix the material, and then as the upper mold 1 and the lower mold 2 continue to approach, the air pressure bottom plate 7 will move up relative to the pressure regulating chamber 12 and squeeze the material pressing spring 8. At this time, compressed air is injected into the pressure regulating chamber 12 through the upper vent 121, so that the air pressure bottom plate 7 moves down, and the air on the lower side of the air pressure bottom plate 7 is discharged through the lower vent 122; the fixed shaft 3 and the pressing ring 4 move down with the air pressure bottom plate 7, so that the pressing ring 4 and the lower blade 5 cooperate to extrude the material;
[0053] After the upper mold 1 and the lower mold 2 are closed, the blister mold works normally to complete the blister action, and the material is continuously squeezed by the pressing ring 4 and the lower blade 5 to obtain a bowl or cup mouth of the required thickness;
[0054] The upper vent 121 stops injecting compressed air into the pressure regulating chamber 12 and switches to an open state so that the gas in the pressure regulating chamber 12 can be discharged from the pressure regulating chamber 12 through the upper vent 121. At this time, the upper mold 1 moves downward so that the upper blade 9 and the lower blade 5 are close to each other and staggered, thereby realizing the cutting action;
[0055] The lower vent hole 122 injects compressed air into the pressure regulating chamber 12 to reset the air pressure bottom plate 7, and finally the upper mold 1 and the lower mold 2 are separated and reset.
[0056] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.
Claims
1. A pressing ring mechanism of a blister mold, comprising a fixed shaft (3), a pressing ring (4) and a lower blade (5), wherein the lower blade (5) is fixed to the periphery of a lower cavity (21) of a lower mold (2), the pressing ring (4) is arranged in an upper cavity (11) of an upper mold (1), the upper end of the pressing ring (4) is fixedly connected to the fixed shaft (3), the pressing ring (4) and the fixed shaft (3) can move vertically following the upper mold (1) and the lower end surface of the pressing ring (4) can abut against the upper end surface of the lower blade (5), the pressing ring (4) and the fixed shaft (3) can reciprocate vertically relative to the upper mold (1), and is characterized in that: A pressure regulating chamber (12) with an upper opening is formed in the upper mold (1), and a pneumatic cover plate (6) capable of sealing the opening is arranged at the upper end of the pressure regulating chamber (12). A pneumatic bottom plate (7) is arranged in the pressure regulating chamber (12), and the outer peripheral surface of the pneumatic bottom plate (7) is sealed and movably connected to the inner side surface of the pressure regulating chamber (12). The fixed shaft (3) passes through the pneumatic cover plate (6), the pneumatic bottom plate (7) and the pressure regulating chamber (12). The pneumatic bottom plate (7) is fixedly connected to the fixed shaft (3) and can move up and down with the fixed shaft (3). An upper air vent (121) is arranged at the upper part of the pressure regulating chamber (12), and a lower air vent (122) is arranged at the lower part of the pressure regulating chamber (12). A pressing spring (8) for driving the pneumatic bottom plate (7) to move downward is arranged between the pneumatic cover plate (6) and the pneumatic bottom plate (7).
2. The pressing ring mechanism of the blister mold according to claim 1, characterized in that: The lower vent hole (122) is arranged on the bottom surface of the regulating cavity, and a lower gas channel (14) communicating with the lower vent hole (122) is arranged in the upper mold (1).
3. The pressing ring mechanism of the blister mold according to claim 1, characterized in that: The upper vent hole (121) is arranged on the side wall of the regulating cavity, and an upper gas channel (13) connected to the upper vent hole (121) is arranged in the upper mold (1), and the distance H1 between the upper side surface of the pressure ring (4) and the upper side wall of the upper cavity (11) is smaller than the distance H2 between the lower side surface of the air pressure bottom plate (7) and the lower edge of the upper vent hole (121).
4. The pressing ring mechanism of the blister mold according to claim 3, characterized in that: The middle and upper part of the regulating cavity is enlarged to form an air inlet groove (123), the upper air vent (121) is arranged at the bottom of the air inlet groove (123), the distance H1 between the upper side surface of the pressure ring (4) and the upper side wall of the upper cavity (11) is equal to the distance H3 between the lower side surface of the air inlet groove (123) and the bottom surface of the regulating cavity.
5. A pressing ring mechanism for a blister mold according to any one of claims 1 to 4, characterized in that: The outer peripheral surface of the air pressure bottom plate (7) is provided with an annular first sealing groove (71), a sealing ring is installed in the first sealing groove (71), and the upper side surface of the air pressure bottom plate (7) is upwardly formed with a cylindrical connecting portion (72), and the connecting portion (72) is sleeved on the outer side of the fixed shaft (3).
6. The pressing ring mechanism of the blister mold according to claim 5, characterized in that: The upper end of the fixed shaft (3) is threadedly connected with a locking nut (31), the lower end surface of the locking nut (31) abuts against the upper end surface of the connecting portion (72), and an annular protrusion (32) is formed on the fixed shaft (3); an annular groove (73) is provided on the lower side surface of the air pressure bottom plate (7), and an adjusting sleeve (74) is installed in the annular groove (73), one end of the adjusting sleeve (74) abuts against the bottom of the annular groove (73), and the other end abuts against the upper side surface of the annular protrusion (32).
7. The pressing ring mechanism of the blister mold according to claim 6, characterized in that: A connecting hole (15) is provided between the pressure regulating cavity (12) and the upper cavity (11) to connect the two. The fixed shaft (3) passes through the connecting hole (15). A limiting convex ring (151) protruding inward is formed at the lower end of the connecting hole (15). A guide sleeve (16) is tightly connected in the connecting hole (15). The lower end of the guide sleeve (16) abuts against the limiting convex ring (151). The outer peripheral surface of the annular protrusion (32) of the fixed shaft (3) is connected to the inner peripheral surface of the guide sleeve (16). A second sealing groove (321) is provided on the outer peripheral surface of the annular protrusion (32), and a sealing ring is installed in the second sealing groove (321).
8. A pressing ring mechanism for a blister mold according to any one of claims 1 to 4, characterized in that: A spring positioning groove (61) is provided on the lower side of the air pressure cover plate (6), the pressure spring (8) is sleeved on the outside of the connecting portion (72), the upper end of the pressure spring (8) is inserted into the spring positioning groove (61), and the lower end of the pressure spring (8) is in contact with the upper side of the air pressure bottom plate (7).
9. A pressing ring mechanism for a blister mold according to any one of claims 1 to 4, characterized in that: The air pressure cover plate (6) is threadedly connected to the opening of the pressure regulating chamber (12); the outer side wall of the air pressure cover plate (6) is formed with a mounting convex ring (62) protruding outward; the lower side surface of the mounting convex ring (62) can abut against the upper side surface of the upper mold (1); the lower side surface of the mounting convex ring (62) is provided with a third sealing groove (621), and a sealing ring is installed in the third sealing groove (621).
10. A pressing ring mechanism for a blister mold according to any one of claims 1 to 4, characterized in that: The lower blade (5) is annular and fixedly connected to the lower mold (2) via a pressure plate (22). An upper blade (9) is sleeved on the outer side of the pressure ring (4). A gap is provided between the outer wall of the pressure ring (4) and the inner wall of the upper blade (9). The upper blade (9) is fixedly connected to the upper mold (1). The inner peripheral wall of the upper blade (9) can be movably fitted with the outer peripheral wall of the lower blade (5) or have a small gap. A guide surface (51) with a higher inner side and a lower outer side is provided on the upper side surface of the lower blade (5).