High-pressure mold locking device of injection-stretch-blow equipment

Abstract

The utility model relates to the technical field of injection-stretch-blow equipment, in particular to a high-pressure mold locking device of injection-stretch-blow equipment, which comprises a base and a top seat, the base is provided with a stand column; a middle plate is movably arranged on the stand column in a lifting mode. The base is provided with a first driving piece; the top seat is provided with a first oil cylinder; the first oil cylinder comprises a cylinder body and a piston rod; a pressure maintaining plate is arranged at the output end of the piston rod; a receding channel is formed in the piston rod. A movable plate is movably arranged on the middle plate in a lifting manner; the movable plate is provided with a pressure maintaining rod; the pressure maintaining rod is movably arranged in the receding channel in a telescopic mode. And the pressure maintaining plate is provided with a die locking assembly at the through hole. According to the injection mold, the mold locking assembly is propped against the pressure maintaining rod, so that pressure maintaining treatment can be performed among the lower mold, the middle mold and the upper mold, and the injection molding effect is effectively ensured; in addition, the pressure maintaining rod is movably arranged in the receding channel in a telescopic mode, the stroke of the pressure maintaining plate can be effectively reduced, and therefore the overall structure can be more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of injection stretch blow molding equipment, in particular to a high-pressure mold locking device for injection stretch blow molding equipment. Background Art

[0002] Injection stretch blow molding equipment is a kind of equipment widely used in the production of plastic hollow products. Its process mainly includes injection molding, heating, stretching and blow molding. This equipment first uses an injection machine to inject molten plastic into the injection mold, and then rapidly cools it to form a transparent bottomed parison. The key to this stage is to ensure uniform cooling and molding of the parison to ensure its transparency and physical properties.

[0003] In the next station, the parison needs to be heated to evenly raise the internal and external temperature to the appropriate stretching temperature. The control accuracy of this process directly affects the quality of the final product. After heating to the predetermined temperature, the equipment will stretch the parison, usually in the axial and radial directions at the same time, to increase the mechanical strength and transparency of the material. After stretching, the parison is expanded into the desired hollow product by filling it with compressed air.

[0004] During the injection molding process, the inability to effectively maintain pressure during mold closing can affect the injection molding effect. Insufficient pressure maintenance can lead to uneven parison density and unstable structure, which in turn affects the quality of the final hollow product. Utility Model Content

[0005] The utility model aims to provide a high-pressure mold clamping device for injection stretch blow molding equipment in view of the above-mentioned deficiencies in the prior art.

[0006] The purpose of the utility model is achieved through the following technical solutions: A high-pressure clamping device for injection stretch blow molding equipment, comprising a base and a top seat; the base is fixedly connected to the top seat; the base is provided with a column; the column is movable and provided with a middle plate; the base is provided with a first driving member for driving the middle plate to rise and fall;

[0007] The top seat is provided with a first oil cylinder; the first oil cylinder comprises a cylinder body and a piston rod telescopically arranged on the cylinder body; the output end of the piston rod is provided with a pressure-maintaining plate; and a clearance channel is provided inside the piston rod;

[0008] The middle plate is provided with a movable plate at the bottom of the pressure-maintaining plate for lifting and lowering; the movable plate is provided with a pressure-maintaining rod; the pressure-maintaining rod is movably and telescopically arranged in the clearance channel; the pressure-maintaining plate is penetrated by a through hole connected to the clearance channel; the pressure-maintaining plate is provided with a locking mold assembly at the through hole.

[0009] The utility model is further configured as follows: a lower mold is provided on the top of the base; a middle mold is provided on the bottom of the middle plate; an upper mold is provided on the bottom of the movable plate; the upper mold is movable and arranged at the top of the middle mold; and the middle mold is movable and arranged at the top of the lower mold.

[0010] The utility model is further configured as follows: a fixed plate is fixedly provided on the top of the middle plate; the movable plate is lifted and movably arranged between the fixed plate and the middle plate; the fixed plate is arranged at the bottom of the pressure maintaining plate; and the pressure maintaining rod is penetrated through the fixed plate.

[0011] The utility model is further configured as follows: a sliding rod is provided between the fixed plate and the middle plate; the movable plate is slidably arranged on the sliding rod; a second driving member is provided on the top of the fixed plate; and the output end of the second driving member is connected to the movable plate.

[0012] The utility model is further configured that the pressure maintaining plate is provided with a making way groove for making way for the second driving member.

[0013] The utility model is further configured that the top seat is provided with a third driving member; and the output end of the third driving member is connected to the pressure maintaining plate.

[0014] The utility model is further configured that the mold locking assembly includes a mold locking seat arranged at the bottom of the pressure maintaining plate, a fourth driving member arranged at the mold locking seat, and a locking module for blocking the through hole.

[0015] The utility model is further configured that a track is provided in the mold locking seat; the locking module is slidably arranged on the track; the through hole is arranged on the track; and the output end of the fourth driving member is connected to the locking module.

[0016] The utility model is further configured that first oil cylinders are provided on both sides of the top seat.

[0017] The beneficial effects of the utility model are as follows: the utility model drives the piston rod through the first oil cylinder to drive the pressure-keeping plate to descend, and the locking assembly abuts against the pressure-keeping rod, so that the lower mold, the middle mold and the upper mold can be pressure-maintained, thereby effectively ensuring the injection molding effect; in addition, the pressure-maintaining rod is movably retracted and arranged in the yielding channel, so the stroke of the pressure-maintaining plate can be effectively reduced, thereby making the overall structure more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the utility model from another perspective;

[0021] Figure 3 It is a cross-sectional view of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the top seat and the pressure-maintaining plate of the utility model;

[0023] Among them: 1. base; 11. column; 12. first driving member; 13. lower mold; 2. top seat; 21. third driving member; 3. middle plate; 31. middle mold; 41. cylinder body; 42. piston rod; 43. clearance channel; 5. pressure holding plate; 51. through hole; 52. clearance groove; 6. movable plate; 61. pressure holding rod; 62. upper mold; 7. fixed plate; 71. sliding rod; 72. second driving member; 8. clamping seat; 81. fourth driving member; 82. locking module; 83. track. DETAILED DESCRIPTION

[0024] The utility model is further described in conjunction with the following embodiments.

[0025] Depend on Figures 1 to 4 It can be seen that the high-pressure locking device of an injection stretch blow molding equipment described in this embodiment includes a base 1 and a top seat 2; the base 1 is fixedly connected to the top seat 2; the base 1 is provided with a column 11; the column 11 is provided with a middle plate 3 for lifting and lowering; the base 1 is provided with a first driving member 12 for driving the middle plate 3 to lift and lower; the top seat 2 is provided with a first oil cylinder; the first oil cylinder includes a cylinder body 41 and a piston rod 42 which is telescopically movably arranged on the cylinder body 41; a pressure holding plate 5 is provided at the output end of the piston rod 42; a clearance channel 43 is provided in the piston rod 42; the middle plate 3 is provided with a movable plate 6 for lifting and lowering at the bottom of the pressure holding plate 5; the movable plate 6 is provided with a pressure holding rod 61; the pressure holding rod 61 is movably and telescopically arranged in the clearance channel 43; the pressure holding plate 5 is penetrated by a through hole 51 connected to the clearance channel 43; the pressure holding plate 5 is provided with a locking assembly at the through hole 51; and it also includes a second driving member 72 for driving the movable plate 6 to lift and lower. In the high-pressure clamping device of the injection stretch blow molding equipment described in this embodiment, the top of the base 1 is provided with a lower mold 13; the bottom of the middle plate 3 is provided with a middle mold 31; the bottom of the movable plate 6 is provided with an upper mold 62; the upper mold 62 is movable and arranged at the top of the middle mold 31; the middle mold 31 is movable and arranged at the top of the lower mold 13. The first driving member 12 and the second driving member 72 can be air cylinders or oil cylinders.

[0026] Specifically, in the high-pressure clamping device of the injection stretch blow molding equipment described in this embodiment, before the lower mold 13, the middle mold 31 and the upper mold 62 are molded together, the pressure-maintaining rod 61 protrudes into the clearance channel 43 through the through hole 51; when it is necessary to close the mold, the middle plate 3 is first driven to descend by the first driving member 12, so that the middle mold 31 and the lower mold 13 are molded together; while the middle plate 3 descends, the movable plate 6 is driven to descend synchronously, and at the same time, the pressure-maintaining rod 61 is descended. After the middle mold 31 and the lower mold 13 are molded together, the movable plate 6 is driven to descend by the second driving member 72, so that the upper mold 62 and the middle mold 31 are molded together, so that the lower mold 13, the middle mold 31 and the upper mold 62 are molded together; while the second driving member 72 drives the movable plate 6 to descend, the pressure-keeping rod 61 descends until the upper mold 62 and the middle mold 31 are molded together, and the top of the pressure-keeping rod 61 extends out of the clearance channel 43 and the through hole 51, and the clamping assembly closes the through hole 51 and the clamping assembly abuts against the pressure-keeping rod 61; then the first oil cylinder is started, so that the piston rod 42 drives the pressure-keeping plate 5 to descend. Since the pressure-keeping plate 5 abuts against the pressure-keeping rod 61 through the clamping assembly, the first oil cylinder can perform pressure-keeping treatment between the lower mold 13, the middle mold 31 and the upper mold 62 when working, thereby effectively ensuring the injection molding effect.

[0027] In addition, in this embodiment, the pressure-maintaining rod 61 is movably and telescopically arranged in the clearance channel 43, which can effectively reduce the stroke of the pressure-maintaining plate 5, thereby making the overall structure more stable.

[0028] In the high-pressure mold clamping device of an injection-stretch-blow molding device described in this embodiment, a fixed plate 7 is fixedly provided on the top of the middle plate 3; the movable plate 6 is movable and arranged between the fixed plate 7 and the middle plate 3; the fixed plate 7 is arranged at the bottom of the pressure-maintaining plate 5; the pressure-maintaining rod 61 is arranged through the fixed plate 7. In the high-pressure mold clamping device of an injection-stretch-blow molding device described in this embodiment, a sliding rod 71 is provided between the fixed plate 7 and the middle plate 3; the movable plate 6 is slidably arranged on the sliding rod 71; a second driving member 72 is provided on the top of the fixed plate 7; and the output end of the second driving member 72 is connected to the movable plate 6.

[0029] Specifically, through the above-mentioned arrangement, this embodiment enables the fixed plate 7 to descend synchronously with the middle plate 3 when the first driving member 12 drives the middle plate 3 to descend, and because the fixed plate 7 is connected to the movable plate 6 through the second driving member 72, the first driving member 12 drives the middle plate 3 to descend and drives the movable plate 6 to descend synchronously; until the middle mold 31 and the lower mold 13 are closed, the second driving member 72 drives the movable plate 6 and the middle plate 3 to descend relatively, so that the upper mold 62 and the middle mold 31 are closed.

[0030] A high-pressure mold clamping device of an injection stretch blow molding device according to this embodiment, the pressure holding plate 5 is provided with a relief groove 52 for making way for the second driving member 72. Specifically, through the above setting, it is possible to make way for the second driving member 72, thereby saving space.

[0031] A high-pressure mold clamping device of an injection stretch blow molding device according to this embodiment, the top seat 2 is provided with a third driving member 21; the output end of the third driving member 21 is connected to the pressure holding plate 5. The third driving member 21 can be a cylinder or an oil cylinder. Specifically, since the volume of the first oil cylinder is relatively large, the extension and retraction speed of the piston rod 42 is slow. By setting the third driving member 21 in this embodiment, the speed of the first oil cylinder can be effectively increased.

[0032] A high-pressure mold clamping device of an injection stretch blow molding device according to this embodiment, the mold clamping assembly includes a mold clamping seat 8 provided at the bottom of the pressure holding plate 5, a fourth driving member 81 provided on the mold clamping seat 8, and a mold clamping block 82 for blocking the through hole 51. The fourth driving member 81 can be a cylinder or an oil cylinder. A high-pressure mold clamping device of an injection stretch blow molding device according to this embodiment, a track 83 is provided in the mold clamping seat 8; the mold clamping block 82 is slidably provided on the track 83; the through hole 51 is provided in the track 83; the output end of the fourth driving member 81 is connected to the mold clamping block 82.

[0033] Before the lower mold 13, the middle mold 31 and the upper mold 62 are clamped, the pressure holding rod 61 protrudes into the relief channel 43 through the through hole 51; when clamping is required, first, the middle plate 3 is driven to descend by the first driving member 12, so that the middle mold 31 and the lower mold 13 are clamped; while the middle plate 3 descends, it drives the movable plate 6 to descend synchronously, and at the same time the pressure holding rod 61 descends. After the middle mold 31 and the lower mold 13 are clamped, the movable plate 6 is driven to descend by the second driving member 72, so that the upper mold 62 and the middle mold 31 are clamped, so that the lower mold 13, the middle mold 31 and the upper mold 62 are clamped; while the second driving member 72 drives the movable plate 6 to descend, the pressure holding rod 61 descends. When the upper mold 62 and the middle mold 31 are clamped, the top of the pressure holding rod 61 extends out of the relief channel 43 and the through hole 51, and then the fourth driving member 81 drives the mold clamping block 82 to move along the track 83, so as to close the through hole 51, and the mold clamping block 82 abuts against the pressure holding rod 61; then the first oil cylinder is started, so that the piston rod 42 drives the pressure holding plate 5 to descend. Since the pressure holding plate 5 abuts against the pressure holding rod 61 through the mold clamping block 82, when the first oil cylinder is working, it can perform pressure holding treatment between the lower mold 13, the middle mold 31 and the upper mold 62, effectively ensuring the injection molding effect.

[0034] A high-pressure mold clamping device of an injection stretch blow molding device according to this embodiment, wherein first oil cylinders are arranged on both sides of the top seat 2. Through the above arrangement, the pressure holding effect can be effectively guaranteed.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A high-pressure clamping device for an injection stretch blow molding machine, characterized in that: It includes a base and a top seat; the base is fixedly connected to the top seat; the base is provided with a column; the column is movable and provided with a middle plate; the base is provided with a first driving member for driving the middle plate to rise and fall; The top seat is provided with a first oil cylinder; the first oil cylinder comprises a cylinder body and a piston rod telescopically arranged on the cylinder body; the output end of the piston rod is provided with a pressure-maintaining plate; and a clearance channel is provided inside the piston rod; The middle plate is provided with a movable plate at the bottom of the pressure-maintaining plate for lifting and lowering; the movable plate is provided with a pressure-maintaining rod; the pressure-maintaining rod is movably and telescopically arranged in the clearance channel; the pressure-maintaining plate is penetrated by a through hole connected to the clearance channel; the pressure-maintaining plate is provided with a locking mold assembly at the through hole.

2. A high-pressure clamping device for injection stretch blow molding equipment according to claim 1, characterized in that: A lower mold is provided at the top of the base; a middle mold is provided at the bottom of the middle plate; an upper mold is provided at the bottom of the movable plate; the upper mold is movable at the top of the middle mold; and the middle mold is movable at the top of the lower mold.

3. The high-pressure clamping device of the injection stretch blow molding equipment according to claim 1, characterized in that: A fixed plate is fixed on the top of the middle plate; the movable plate is lifted and movably arranged between the fixed plate and the middle plate; the fixed plate is arranged at the bottom of the pressure-maintaining plate; and the pressure-maintaining rod is penetrated through the fixed plate.

4. A high-pressure clamping device for injection stretch blow molding equipment according to claim 3, characterized in that: A sliding rod is provided between the fixed plate and the middle plate; the movable plate is slidably arranged on the sliding rod; a second driving member is provided on the top of the fixed plate; and an output end of the second driving member is connected to the movable plate.

5. A high-pressure clamping device for injection stretch blow molding equipment according to claim 4, characterized in that: The pressure-maintaining plate is provided with a clearance groove for making way for the second driving member.

6. The high-pressure clamping device of the injection stretch blow molding equipment according to claim 1, characterized in that: The top seat is provided with a third driving member; the output end of the third driving member is connected to the pressure maintaining plate.

7. The high-pressure clamping device of the injection stretch blow molding equipment according to claim 1, characterized in that: The mold locking assembly comprises a mold locking seat arranged at the bottom of the pressure maintaining plate, a fourth driving member arranged at the mold locking seat, and a locking module for blocking the through hole.

8. A high pressure clamping device for injection stretch blow molding equipment according to claim 7, characterized in that: A track is provided in the clamping seat; the locking module is slidably arranged on the track; The through hole is arranged on the track; and the output end of the fourth driving member is connected to the lock module.

9. The high-pressure clamping device of the injection stretch blow molding equipment according to claim 1, characterized in that: The first oil cylinders are arranged on both sides of the top seat.

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