Injection blow molding machine with rapid cooling forming capability

Abstract

The invention relates to the technical field of plastic processing, in particular to an injection blow molding machine with rapid cooling and molding capabilities, which comprises a bottom frame, an auxiliary blow molding assembly, a first blow molding mold, a second blow molding mold and the like, an auxiliary blowing and injecting assembly is mounted on the bottom frame; a bottle preform is manufactured through the auxiliary blow-injection assembly; a first blowing mold is connected to the bottom frame in a sliding manner; a plurality of first mold cavities are formed in each first blowing mold; a second blowing mold is connected to the bottom frame in a sliding manner; a plurality of second mold cavities are formed in each second blowing mold; two driving pieces are fixedly connected to the bottom frame. The telescopic end of each driving piece is fixedly connected with the first blowing mold and the second blowing mold. Low-temperature gas is directly blown to the surface of the formed plastic bottle, so that heat on the surface of the plastic bottle is directly taken away, the distance and time of heat transfer are reduced, the cooling speed of the formed plastic bottle is increased, and the effect of rapidly cooling the plastic bottle can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, in particular to an injection-blow molding machine with rapid cooling and molding capabilities. Background Art

[0002] In the injection blow molding process, the blow tube is first inserted into the injection mold, and the material in the plasticized state is injected to form a preliminary shape of the bottle embryo on the blow tube. Then, the blow tube and the newly formed bottle embryo are transferred to the blow mold. At this stage, compressed gas is injected into the bottle embryo through the blow tube, causing the bottle embryo to expand outward and fit tightly with the inner wall of the blow mold, thereby completing the final molding of the plastic bottle. However, the temperature of the newly formed plastic bottle is relatively high. The traditional cooling method relies on setting a cooling channel in the mold to reduce the mold temperature, and then indirectly cooling the plastic bottle by the mold. This method increases the heat transfer path, resulting in a slower cooling rate and a longer cooling time. For some plastic bottles that have strict requirements on dimensional stability and surface quality, this cooling method cannot meet the needs of rapid cooling, which in turn affects the production quality and efficiency of the product. Summary of the invention

[0003] In order to overcome the shortcomings of the existing injection blow molding machine in the cooling stage after the plastic bottle is formed, which relies on the indirect cooling method of the mold, resulting in low cooling efficiency and long cooling time, and cannot meet the rapid cooling needs of products with strict requirements on dimensional stability and surface quality, thereby affecting the production quality and efficiency, the present invention provides an injection blow molding machine with rapid cooling capability.

[0004] Technical solution: An injection blow molding machine with rapid cooling and molding capabilities, including a base frame and an auxiliary blow molding assembly; the auxiliary blow molding assembly is installed on the base frame; bottle embryos are made by the auxiliary blow molding assembly; it also includes a first blow molding mold, a second blow molding mold, a base plate, a top plate, a driving member and a blanking assembly; the first blow molding mold is slidably connected to the base frame; each first blow molding mold is provided with a plurality of first mold cavities; the second blow molding mold is slidably connected to the base frame; each second blow molding mold is provided with a plurality of second mold cavities; two driving members are fixedly connected to the base frame; the telescopic end of each driving member is respectively fixedly connected to the first blow molding mold and the second blow molding mold; the blanking assembly is installed on the base frame; the blanking assembly is connected to the A bottom plate is connected, and the bottom plate is driven to move up and down and left and right through the material discharge assembly; a plurality of bottom mold cores are arranged on the bottom plate, and each bottom mold core forms a blow molding cavity of the plastic bottle together with the adjacent first mold cavity and the second mold cavity; a plurality of air collecting holes are opened on the bottom plate; a first connecting cavity is opened in the bottom plate, and the first connecting cavity is connected with all the air collecting holes; a vent is opened at the lower part of the first connecting cavity; a top plate is fixedly connected to the base frame; the top plate is in sliding contact with the upper surface of the first blow molding mold and the upper surface of the second blow molding mold respectively; a plurality of through holes are opened on the top plate; a third connecting cavity is opened in the top plate, and the third connecting cavity is connected with the external air storage device through an air pipe; a plurality of exhaust holes are opened at the bottom of the third connecting cavity.

[0005] In addition, it is particularly preferred that the auxiliary blow-injection assembly includes a lifting platform, a rotating plate, a fixed plate, a blow-injection tube and an injection unit; a lifting platform is arranged on the base frame; an electric push rod is installed on the base frame; the lifting platform is driven to lift and lower by the electric push rod; a rotating plate is rotatably connected to the lifting platform; a motor is arranged on the lifting platform, and the rotating plate is driven to rotate by the motor; four fixed plates arranged in a ring are fixedly connected to the rotating plate; a number of blow-injection tubes are fixedly connected to each fixed plate; an air supply channel is provided in each blow-injection tube, and the blow-injection tube is connected to an external air pump device; an injection unit is installed on the base frame; the injection unit consists of an electric push rod, two injection molds and an injection tube; the closing and opening of the two injection molds are controlled by the electric push rod; an inner cavity is opened on the injection mold for easy entry of the blow-injection tube, and the injection tube is used to transport molten plastic, and the molten plastic is injected between the injection mold and the blow-injection tube through the injection tube, thereby forming a bottle embryo on the blow-injection tube.

[0006] In addition, it is particularly preferred that a plurality of grooves are provided on the first blow molding mold; a plurality of protrusions are provided on the second blow molding mold, and the protrusions are slidably connected to the grooves.

[0007] In addition, it is particularly preferred that the unloading assembly includes a first slide rail, a first electric slider, a second slide rail and a second electric slider; the first slide rail is fixedly connected to the base frame; the first electric slider is slidably connected to the first slide rail; the second slide rail is fixedly connected to the first electric slider; the second electric slider is slidably connected to the second slide rail; the second electric slider is fixedly connected to the bottom of the base plate.

[0008] In addition, it is particularly preferred that it also includes a gas tank; a gas tank for recovering gas to reduce energy loss is fixedly connected to the base frame; the gas tank is connected to the vent of the first connecting cavity through a hose; and the gas tank is connected to an external gas storage device.

[0009] In addition, it is particularly preferred that it also includes a sliding rod and a first elastic member; a second connecting cavity is opened inside the bottom plate to facilitate the bottom plate to absorb the plastic bottle, and the second connecting cavity is connected to the external vacuum device; a sealed cavity is opened inside each bottom mold core; a sliding rod is slidably connected in each sealed cavity; a first elastic member is fixedly connected between each sliding rod and the second connecting cavity.

[0010] In addition, it is particularly preferred that a snap ring portion is provided on the lower side of each slide rod, and the snap ring portion is located at the connection between the sealing cavity and the second connecting cavity; and the diameter of the snap ring portion is set to be larger than the maximum diameter of the sealing cavity.

[0011] In addition, it is particularly preferred that it also includes a top block and a second elastic member; a cavity is provided in each sliding rod; a top block is slidably connected in each cavity; the top block passes through the top surface of the sliding rod, and the top block passes through the upper surface of the bottom mold core; the top block is slidably connected to the bottom mold core; the upper end surface of the top block and the surface of the bottom mold core perfectly fit to form a complete bottom mold surface; a second elastic member is fixedly connected between each top block and the upper top surface of the cavity.

[0012] In addition, it is particularly preferred that it also includes a lower pressure plate and a slide plate; a plurality of lower pressure plates are fixedly connected to the rotating plate; each lower pressure plate is provided with an inclined portion; a slide plate for improving the sealing of the blow mold cavity is connected to the top plate through a spring; two left-right symmetrical extrusion blocks are provided on the slide plate; the lowest point of the lower pressure plate is set to be lower than the lowest point of the blow tube; and the slide plate initially covers the through hole of the top plate.

[0013] In addition, it is particularly preferred that it also includes an air inlet pipe and an annular tube; an annular groove is provided on the outside of each bottom mold core; an air inlet pipe is fixedly connected to the bottom plate; the air inlet pipe is connected to a plurality of annular tubes for preventing water droplets from condensing on the surface of the plastic bottle; each annular tube is located in an adjacent annular groove; the air inlet pipe is connected to the gas storage tank through a hose; and a plurality of blowing holes arranged in a ring shape are opened on the annular tube.

[0014] Beneficial effects: Compared with the method of cooling the plastic bottle through the mold, the low-temperature gas is directly blown to the surface of the formed plastic bottle, thereby directly taking away the heat on the surface of the plastic bottle, reducing the distance and time of heat transfer, thereby increasing the cooling speed of the formed plastic bottle, and achieving the effect of rapid cooling of the plastic bottle; By controlling the bottom mold core on the bottom plate to support and move the plastic bottle, it is unnecessary to use an external suction cup to move, align and suck the plastic bottle, thereby improving the production efficiency of the plastic bottle; A low-temperature airflow is delivered to the third communicating cavity through an external air storage device, so that the airflow continues to blow downward until it blows out of the bottom of the first blow mold and the second blow mold, thereby preventing water vapor in the outside air from entering the first blow mold and the second blow mold from condensing inside through the low-temperature airflow, thereby preventing condensed water droplets from affecting the molding quality of the surface of the plastic bottle; The plastic bottle is pushed upward by the top block, so that the plastic bottle is separated from the bottom mold core, so that when the external unloading unit takes the plastic bottle, the top block pushes it upward, which facilitates the unloading of the plastic bottle and improves the unloading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the injection-blow molding machine with rapid cooling and molding capability of the present invention; Figure 2 A top view of the structure between the base frame and the lifting platform of the present invention; Figure 3 It is a combined cross-sectional view of the base frame and the lifting platform of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the fixing plate, the blowing tube and the preform assembly of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the first blow mold, the second blow mold and the top plate of the present invention, wherein the top plate is processed in cross section; Figure 6 This is a diagram showing the first blow mold and the second blow mold of the present invention in an opened state; Figure 7 It is a schematic diagram of the three-dimensional structure of the rotating plate, the lower pressing plate and the sliding plate combination of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the top plate, the lower pressing plate and the sliding plate combination of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the base plate, the air intake pipe and the annular pipe combination of the present invention, wherein the base plate is cross-sectionally processed; Fig.10 It is a cross-sectional view of the base plate and the slide bar combination of the present invention; Fig.11 It is a sectional view of the bottom plate part of the present invention.

[0016] In the figure: 1-base frame, 2-lifting platform, 3-turn plate, 4-fixed plate, 5-blow injection tube, 6-bottle embryo, 7-injection unit, 8-first blow mold, 8001-first mold cavity, 8002-groove, 9-second blow mold, 9001-second mold cavity, 9002-protrusion, 10-bottom plate, 1001-bottom mold core, 1002-gas collecting hole, 1003-first connecting cavity, 1004-second connecting cavity, 1005-sealing cavity, 1006-ring groove, 11-top plate, 1101-through hole, 1 102-third connecting cavity, 1103-exhaust hole, 201-driving member, 202-first slide rail, 203-first electric slider, 204-second slide rail, 205-second electric slider, 206-gas storage tank, 207-slide rod, 20701-clamping ring part, 20702-cavity, 208-first elastic member, 209-top block, 210-second elastic member, 211-lower pressure plate, 21101-inclined part, 212-slide plate, 21201-extrusion block, 301-inlet pipe, 302-annular pipe. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0018] Example 1 An injection blow molding machine with rapid cooling and molding capabilities, such as Figure 1-Figure 11 As shown, it includes a base frame 1 and an auxiliary blowing assembly; the auxiliary blowing assembly is installed on the base frame 1; and the bottle blank 6 is made by the auxiliary blowing assembly; It also includes a first blow mold 8, a second blow mold 9, a bottom plate 10, a top plate 11, a driving member 201 and a blanking assembly; the first blow mold 8 is slidably connected to the front side of the base frame 1; each first blow mold 8 is provided with four first mold cavities 8001; the second blow mold 9 is slidably connected to the front side of the base frame 1; each second blow mold 9 is provided with four second mold cavities 9001; two front-to-back symmetrical driving members 201 are fixedly connected to the front side of the base frame 1, and the driving members 201 are electric push rods; the telescopic ends of each driving member 201 are respectively fixedly connected to the first blow mold 8 and the second blow mold 9; a blanking assembly is installed on the base frame 1; the bottom plate 10 is connected to the blanking assembly, and the bottom plate 10 is driven to move up and down and left and right through the blanking assembly; four bottom mold cores 1 are provided on the bottom plate 10 001, and each bottom mold core 1001 forms a blow molding cavity of the plastic bottle together with the adjacent first mold cavity 8001 and the second mold cavity 9001; three air collecting holes 1002 are opened on the bottom plate 10; a first connecting cavity 1003 is opened in the bottom plate 10, and the first connecting cavity 1003 is connected with all the air collecting holes 1002; a vent is opened at the lower part of the first connecting cavity 1003; a top plate 11 is fixedly connected to the base frame 1; the top plate 11 is in sliding contact with the upper surface of the first blow mold 8 and the upper surface of the second blow mold 9 respectively; four through holes 1101 are opened on the top plate 11; a third connecting cavity 1102 is opened in the top plate 11, and the third connecting cavity 1102 is connected with the external air storage device through an air pipe; three exhaust holes 1103 are opened at the bottom of the third connecting cavity 1102.

[0019] The auxiliary blow injection assembly includes a lifting platform 2, a rotating plate 3, a fixed plate 4, a blow injection tube 5 and an injection unit 7; a lifting platform 2 is arranged on the base frame 1; an electric push rod is installed on the base frame 1; the lifting platform 2 is driven to lift by the electric push rod; the lifting platform 2 is rotatably connected with the rotating plate 3; a motor is arranged on the lifting platform 2, and the rotating plate 3 is driven to rotate by the motor; four fixed plates 4 arranged in a ring are fixedly connected to the rotating plate 3; four blow injection tubes 5 are fixedly connected to each fixed plate 4; each blow injection tube 5 is provided with an air delivery channel, and the blow injection tube 5 is connected to an external pump air device; an injection unit 7 is installed on the rear side of the base frame 1; the injection unit 7 is composed of an electric push rod, two injection molds and an injection tube; the closing and opening of the two injection molds are controlled by the electric push rod; an inner cavity for the blow injection tube 5 to enter is opened on the injection mold, and the injection tube is used to transport molten plastic, and the molten plastic is injected between the injection mold and the blow injection tube 5 through the injection tube, so as to form a bottle embryo 6 on the blow injection tube 5.

[0020] The first blow mold 8 is provided with two bilaterally symmetrical grooves 8002 ; the second blow mold 9 is provided with two bilaterally symmetrical protrusions 9002 , and the protrusions 9002 are slidably connected to the grooves 8002 .

[0021] The unloading assembly includes a first slide rail 202, a first electric slider 203, a second slide rail 204 and a second electric slider 205; the first slide rail 202 is fixedly connected to the front side of the base frame 1; the first electric slider 203 is slidably connected to the first slide rail 202; the first electric slider 203 is fixedly connected to the second slide rail 204; the second electric slider 205 is slidably connected to the second slide rail 204; the second electric slider 205 is fixedly connected to the bottom of the base plate 10.

[0022] It also includes a gas tank 206; the gas tank 206 is fixedly connected to the base frame 1; the gas tank 206 is connected to the vent of the first connecting cavity 1003 through a hose; the gas tank 206 is connected to an external gas storage device.

[0023] It also includes a sliding rod 207 and a first elastic member 208; a second connecting cavity 1004 is opened inside the bottom plate 10, and the second connecting cavity 1004 is connected to an external vacuum device; a sealed cavity 1005 is opened inside each bottom mold core 1001; a sliding rod 207 is slidably connected in each sealed cavity 1005; a first elastic member 208 is fixedly connected between each sliding rod 207 and the second connecting cavity 1004, and the first elastic member 208 is a spring.

[0024] Furthermore, in order to ensure that the sliding rod 207 does not protrude from the surface of the bottom mold core 1001 under normal circumstances, a clamping ring portion 20701 is provided on the lower side of each sliding rod 207, and the clamping ring portion 20701 is located at the connection between the sealing cavity 1005 and the second connecting cavity 1004; the diameter of the clamping ring portion 20701 is set to be larger than the maximum diameter of the sealing cavity 1005.

[0025] It also includes a top block 209 and a second elastic member 210; a cavity 20702 is provided in each slide bar 207; a top block 209 is slidably connected in each cavity 20702; the top block 209 passes through the top surface of the slide bar 207, and the top block 209 passes through the upper surface of the bottom mold core 1001; the top block 209 is slidably connected to the bottom mold core 1001; the upper end surface of the top block 209 and the surface of the bottom mold core 1001 perfectly fit to form a complete bottom mold surface; a second elastic member 210 is fixedly connected between each top block 209 and the upper top surface of the cavity 20702, and the second elastic member 210 is a spring.

[0026] It also includes a lower pressure plate 211 and a slide plate 212; four lower pressure plates 211 arranged in a ring are fixedly connected to the rotating plate 3; each lower pressure plate 211 is provided with an inclined portion 21101; the slide plate 212 is connected to the top plate 11 through a spring; two left-right symmetrical extrusion blocks 21201 are provided on the slide plate 212; the lowest point of the lower pressure plate 211 is set to be lower than the lowest point of the blowing tube 5; initially, the slide plate 212 covers the through hole 1101 of the top plate 11.

[0027] The following is a detailed description of the processing of plastic bottles: First, the lifting platform 2 is controlled to move downward by the electric push rod, so that the lifting platform 2, the rotating plate 3 and the fixed plate 4 and their connecting parts move downward, so that the blowing tube 5 on the fixed plate 4 at the rear side is inserted into the injection unit 7, and then the injection unit 7 is used to form a bottle embryo 6 on the blowing tube 5. At this time, the bottle embryo 6 is in a plastic state, and then the lifting platform 2 is controlled to move upward, so that the blowing tube 5 and the bottle embryo 6 move upward together and separate from the injection unit 7, and then, based on the view from top to bottom, the motor on the rotating plate 3 is controlled to rotate, so that the rotating plate 3 rotates 180 degrees clockwise, so that the bottle embryo 6 on the blowing tube 5 at the rear side faces the front side, and then the lifting platform 2 is controlled to move downward, thereby synchronously driving the lower pressing plate 211, the blowing tube 5 and the bottle embryo 6 to move downward. The lowest point of the pressing plate 211 is set to be lower than the lowest point of the blowing tube 5, so that the inclined portion 21101 of the lower pressing plate 211 first contacts the extrusion block 21201 of the slide plate 212, and the extrusion block 21201 is pressed downward by the inclined portion 21101, so that the extrusion block 21201 is pushed forward, so that the slide plate 212 moves forward, and the spring between the slide plate 212 and the top plate 11 is compressed, and the through hole 1101 is opened, and then the lifting platform 2 is controlled to continue to move downward, so that the blowing tube 5 and the bottle embryo 6 first pass through the corresponding through hole 1101 on the top plate 11, and then are inserted between the first blow mold 8 and the second blow mold 9, and then the two driving members 201 are controlled to drive the adjacent first blow mold 8 and the second blow mold 9 The first blow mold 8 and the second blow mold 9 are moved toward each other so that the first blow mold 8 and the second blow mold 9 are fitted with each other, and the first blow mold 8 and the second blow mold 9 are respectively tightly fitted with the bottom plate 10 and the top plate 11, so that the air collecting hole 1002 and the exhaust hole 1103 are covered by the first blow mold 8 and the second blow mold 9, and a sealed blow mold cavity is formed between the first mold cavity 8001, the second mold cavity 9001 and the bottom mold core 1001, and the bottle embryo 6 is located in the corresponding blow mold cavity, and then the external air pumping device is controlled to pump air into the air delivery channel in the blowing tube 5, so that the air flow is blown into the bottle embryo 6, so that the bottle embryo 6 is inflated and expanded until the outer wall of the bottle embryo 6 is fitted with the blow mold cavity, and the blowing tube 5 is separated from the bottle embryo 6, thereby completing the molding of the plastic bottle, and then the lifting platform 2 is controlled to move upward The lower pressing plate 211 and the blowing tube 5 are moved upward until the blowing tube 5 is withdrawn from the through hole 1101, and the formed plastic bottle remains in the blow molding cavity. At this time, the inclined portion 21101 of the lower pressing plate 211 is separated from the extrusion block 21201 of the slide plate 212, and the slide plate 212 loses the extrusion of the lower pressing plate 211. Therefore, under the action of the spring between the slide plate 212 and the top plate 11, the slide plate 212 moves backward and resets, thereby covering the through hole 1101 and isolating the through hole 1101 from the outside air. Subsequently, the formed plastic bottle needs to be cooled, and the conventional cooling method for plastic bottles is usually to cool the plastic bottle through the mold, that is, the mold itself needs to be cooled by cold water first, and then the plastic is indirectly cooled through the contact between the mold and the plastic bottle.This increases the distance and time of heat transfer, so the cooling rate is slow. For this reason, the two driving members 201 are controlled to drive the adjacent first blow mold 8 and the second blow mold 9 to move in opposite directions, so that the movement can be stopped when a gap is generated between the first blow mold 8 and the second blow mold 9, so that the first blow mold 8 and the second blow mold 9 are separated from the molded plastic bottle, and a gap is left between them. In addition, the protrusion 9002 is stuck in the adjacent groove 8002, so that the first blow mold 8 and the second blow mold 9 are still in a sealed state. At this time, the air collecting hole 1002 and the exhaust hole 1103 are both connected to the blow mold cavity, and then a low-temperature airflow is transported to the third connecting cavity 1102 through an external air storage device, so that the airflow is blown downward into the blow mold cavity through the exhaust hole 1103, so that the gas fills the first blow mold 8 and the second blow mold 9 and the plastic bottle. The gap between the bottles, and then the gas continues to flow downward to the gas collecting hole 1002, and then converges into the first connecting cavity 1003, and finally is discharged from the first connecting cavity 1003 into the gas storage tank 206, and the blown gas is recovered through the gas storage tank 206, and then transmitted to the external gas storage device again, and the recovered gas is cooled again by the external gas storage device, so as to reduce energy loss. In this way, compared with the method of cooling the plastic bottle through the mold, the low-temperature gas is directly blown to the surface of the formed plastic bottle, so as to directly take away the heat on the surface of the plastic bottle, reduce the distance and time of heat transfer, thereby increasing the cooling speed of the formed plastic bottle, and can achieve the effect of rapid cooling of the plastic bottle. At the same time, the flow rate and temperature of the low-temperature airflow can be controlled to meet the different cooling rate requirements of the plastic bottle and improve the production efficiency of the plastic bottle.

[0028] When the plastic bottle is cooled, the conventional plastic bottle unloading method is to first control the mold to open, then use the external movable suction cup to suck the bottom of the plastic bottle, and then transfer the plastic bottle to the external conveyor belt. In this way, the external movable suction cup takes time to move, align and suck the plastic bottle, thereby reducing the efficiency of plastic bottle unloading. Therefore, when the plastic bottle is cooled, the second electric slider 205 is controlled to move downward on the second slide rail 204, so that the bottom plate 10, the bottom mold core 1001 and the formed plastic bottle move downward until the plastic bottle is The bottle is separated from between the first blow mold 8 and the second blow mold 9, and the first electric slider 203 is controlled to move to the left on the first slide rail 202, thereby driving the plastic bottle to move to the left. In this way, the plastic bottle on the bottom plate 10 is taken away by the external unloading unit on the left side of the base frame 1 to realize the unloading of the plastic bottle. Compared with the conventional unloading method of plastic bottles, the bottom mold core 1001 on the bottom plate 10 is controlled to support and move the plastic bottle, thereby eliminating the need for additional external suction cups to move, align and suck the plastic bottle, thereby improving the production efficiency of plastic bottles.

[0029] In the process of cooling the plastic bottle by the low-temperature airflow, the low-temperature airflow will simultaneously blow to the inner surfaces of the first blow mold 8 and the second blow mold 9, so that the temperature of the inner surfaces of the first blow mold 8 and the second blow mold 9 will be reduced synchronously. As the bottom plate 10 drives the plastic bottle to move downward for the unloading operation, the bottom of the first blow mold 8 and the second blow mold 9 is in an open state. In the case of high humidity in the external environment, condensation is likely to occur, that is, water vapor in the air is likely to contact the inner surfaces of the first blow mold 8 and the second blow mold 9 through the bottom of the first blow mold 8 and the second blow mold 9, so that the low temperature of the inner surfaces of the first blow mold 8 and the second blow mold 9 will condense the water vapor in the air, so that water droplets are attached to the inner surfaces of the first blow mold 8 and the second blow mold 9. In this way, when the subsequent bottle embryo 6 is blow-molded, it is easy to cause defects on the surface of the plastic bottle. For this reason, a slide plate is used to 212 cuts off the connection between the through hole 1101 and the outside air, thereby preventing water vapor in the outside air from entering the first blow mold 8 and the second blow mold 9 through the through hole 1101, and the protrusion 9002 is stuck in the adjacent groove 8002, thereby blocking water vapor in the outside air from entering between the first blow mold 8 and the second blow mold 9 from the left and right sides of the first blow mold 8 and the second blow mold 9, so that only the bottom between the first blow mold 8 and the second blow mold 9 is in an open state. In this state, a low-temperature airflow is delivered to the third connecting cavity 1102 through an external air storage device, so that the airflow continues to blow downward until it blows out of the bottom of the first blow mold 8 and the second blow mold 9, thereby preventing water vapor in the outside air from entering the inside from the bottom of the first blow mold 8 and the second blow mold 9 and causing condensation through the low-temperature airflow, thereby preventing condensed water droplets from affecting the molding quality of the surface of the plastic bottle.

[0030] In the process of unloading the plastic bottles, in order to prevent the plastic bottles from accidentally detaching from the bottom plate 10 during movement, thereby causing unloading failure, when the bottom plate 10 moves downward, air is pumped into the second communicating cavity 1004 through an external air pumping device, so that the air pressure in the second communicating cavity 1004 is lower than the air pressure in the sealing cavity 1005. Since the clamping ring 20701 is located at the connection between the second communicating cavity 1004 and the sealing cavity 1005, when there is a pressure difference between the upper and lower sides of the clamping ring 20701, the clamping ring 20701 is pressed against the bottom plate 1005. 701 slides downward, and at the same time, the first elastic member 208 is compressed, thereby driving the slide bar 207 and the top block 209 to move downward, so that the top block 209 is retracted downward into the sealed cavity 1005, so that the top block 209 is separated from the bottom of the plastic bottle, so that the second connecting cavity 1004 and the sealed cavity 1005 are connected, and the sealed cavity 1005 and the bottom of the plastic bottle are connected. As the external vacuum device continues to pump air, the second connecting cavity 1004 and the sealed cavity 1005 are in a negative pressure state, so that the plastic bottle is firmly adsorbed on the bottom mold core 100 by the negative pressure. 1, to avoid the plastic bottle being separated from the bottom plate 10 during movement, resulting in the failure of unloading, and to improve the stability of the unloading operation, until the plastic bottle moves to the external unloading unit, the external air pumping device is controlled to perform the inflation work, so that the air pressure in the second connecting cavity 1004 and the sealing cavity 1005 is restored to be consistent with the external air pressure, and the negative pressure adsorption effect in the second connecting cavity 1004 disappears, and at the same time the first elastic member 208 is restored to its original state, so that the sliding rod 207 and the top block 209 move upward and return to the initial position, so that the external unloading unit is convenient for The plastic bottle is removed from the bottom plate 10. On this basis, while the slide bar 207 moves upward to reset, the snap ring portion 20701 is simultaneously driven to move upward until the snap ring portion 20701 is stuck at the connection between the sealing cavity 1005 and the second connecting cavity 1004. Since the diameter of the snap ring portion 20701 is set to be larger than the maximum diameter of the sealing cavity 1005, the snap ring portion 20701 is restricted from continuing to move upward, thereby ensuring that the slide bar 207 and the top block 209 will not protrude from the surface of the bottom mold core 1001 under normal conditions, thereby ensuring the molding quality of the plastic bottle.

[0031] Furthermore, during the molding process of plastic products, there is a situation where the plastic bottle is firmly adhered to the surface of the bottom mold core 1001. For this reason, before the external unloading unit takes the plastic bottle, the external vacuum device is controlled to pump air into the second connecting cavity 1004, and at the same time, the cavity 20702 is filled with air, so that the air pressure in the second connecting cavity 1004 and the cavity 20702 increases, so that the top block 209 moves upward, and the second elastic member 210 is compressed, so that the top block 209 protrudes from the upper surface of the bottom mold core 1001, and the plastic bottle is pushed upward by the top block 209, so that the plastic bottle is separated from the bottom mold core 1001, so that when the external unloading unit takes the plastic bottle, the top block 209 is pushed upward, which facilitates the removal of the plastic bottle and improves the unloading efficiency.

[0032] Example 2 On the basis of Example 1, Figure 3 and Fig. 9 As shown, it also includes an air inlet pipe 301 and an annular pipe 302; an annular groove 1006 is provided on the outer side of each bottom mold core 1001; the air inlet pipe 301 is fixedly connected to the bottom plate 10; four annular pipes 302 are connected to the air inlet pipe 301; each annular pipe 302 is located in an adjacent annular groove 1006; the air inlet pipe 301 is connected to the air storage tank 206 through a hose; and a plurality of blowing holes arranged in a ring shape are opened on the annular pipe 302.

[0033] Since the surface temperature of the plastic bottle is relatively low when it is cooled by the low-temperature gas, water droplets will inevitably condense on the surface of the plastic bottle after it is cooled and exposed to the air. Therefore, when the plastic bottle is subsequently labeled, the water on the surface of the plastic bottle will affect the adhesion between the label and the bottle body. Therefore, when the plastic bottle is cooled in the blow molding cavity, the low-temperature gas absorbs the temperature of the plastic bottle and the mold surface, and its temperature rises. The heated gas is then stored in the gas storage tank 206. When the plastic bottle is cooled, the bottom plate 10 drives the plastic bottle to move downward. At this time, the air storage tank 206 is controlled to pump air into the air inlet pipe 301 through the hose, so that the air flow is blown upward through a plurality of annular blowing holes on the annular tube 302, so that the air flow continues to blow around the body of the plastic bottle, so that an annular wind curtain is formed between the surface of the plastic bottle and the outside air, thereby preventing water vapor in the outside air from directly contacting the surface of the plastic bottle, and blowing the higher temperature gas in the air storage tank 206 to the body of the plastic bottle, so that the surface of the plastic bottle begins to warm up, thereby avoiding condensation on the surface of the plastic bottle, thereby avoiding affecting the subsequent label bonding quality.

[0034] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. An injection blow molding machine with rapid cooling and molding capability, comprising a base frame (1) and an auxiliary blow molding assembly; the auxiliary blow molding assembly is mounted on the base frame (1); a preform (6) is manufactured by the auxiliary blow molding assembly; the characteristics are: The invention also comprises a first blow mould (8), a second blow mould (9), a bottom plate (10), a top plate (11), a driving member (201) and a blanking assembly; the first blow mould (8) is slidably connected to the bottom frame (1); each first blow mould (8) is provided with a plurality of first mould cavities (8001); the second blow mould (9) is slidably connected to the bottom frame (1); each second blow mould (9) is provided with a plurality of second mould cavities (9001); two driving members (201) are fixedly connected to the bottom frame (1); the telescopic end of each driving member (201) is respectively fixedly connected to the first blow mould (8) and the second blow mould (9); a blanking assembly is installed on the bottom frame (1); the blanking assembly is connected to the bottom plate (10), and the bottom plate (10) is driven to move up and down and left and right by the blanking assembly; a plurality of bottom mould cores (1001) are provided on the bottom plate (10), and each bottom mould core (1001) is provided with a plurality of bottom mould cores (1001), and each bottom mould core (1001) is provided with a plurality of bottom mould cores (1001). The core (1001) forms a blow molding cavity of a plastic bottle together with the adjacent first mold cavity (8001) and the second mold cavity (9001); a plurality of air collecting holes (1002) are provided on the bottom plate (10); a first connecting cavity (1003) is provided in the bottom plate (10), and the first connecting cavity (1003) is connected to all the air collecting holes (1002); a vent is provided at the lower part of the first connecting cavity (1003); a top plate (11) is fixedly connected to the bottom frame (1); the top plate (11) is in sliding contact with the upper surface of the first blow molding mold (8) and the upper surface of the second blow molding mold (9) respectively; a plurality of through holes (1101) are provided on the top plate (11); a third connecting cavity (1102) is provided in the top plate (11), and the third connecting cavity (1102) is connected to an external air storage device through an air pipe; and a plurality of exhaust holes (1103) are provided at the bottom of the third connecting cavity (1102).

2. The injection blow molding machine with rapid cooling and molding capability according to claim 1, characterized in that: The auxiliary injection assembly comprises a lifting platform (2), a rotating plate (3), a fixed plate (4), an injection tube (5) and an injection unit (7); the lifting platform (2) is arranged on a base frame (1); an electric push rod is installed on the base frame (1); the lifting platform (2) is driven to lift by the electric push rod; the lifting platform (2) is rotatably connected to a rotating plate (3); a motor is arranged on the lifting platform (2), and the rotating plate (3) is driven to rotate by the motor; four fixed plates (4) arranged in an annular shape are fixedly connected to the rotating plate (3); each fixed plate (4) is fixedly connected to a plurality of A blow tube (5); each blow tube (5) is provided with an air delivery channel, and the blow tube (5) is connected to an external air pump device; an injection unit (7) is installed on the base frame (1); the injection unit (7) is composed of an electric push rod, two injection molds and an injection tube; the electric push rod is used to control the closing and opening of the two injection molds; the injection mold is provided with an inner cavity for facilitating the entry of the blow tube (5), and the injection tube is used to transport molten plastic, and the molten plastic is injected into between the injection mold and the blow tube (5) through the injection tube, thereby forming a bottle embryo (6) on the blow tube (5).

3. The injection blow molding machine with rapid cooling and molding capability according to claim 1, characterized in that: The first blow mould (8) is provided with a plurality of grooves (8002); the second blow mould (9) is provided with a plurality of protrusions (9002), and the protrusions (9002) are slidably connected to the grooves (8002).

4. The injection blow molding machine with rapid cooling and molding capability according to claim 1, characterized in that: The material unloading assembly comprises a first slide rail (202), a first electric slider (203), a second slide rail (204) and a second electric slider (205); the first slide rail (202) is fixedly connected to the base frame (1); the first electric slider (203) is slidably connected to the first slide rail (202); the second slide rail (204) is fixedly connected to the first electric slider (203); the second slide rail (204) is slidably connected to the second electric slider (205); the second electric slider (205) is fixedly connected to the bottom of the base plate (10).

5. The injection blow molding machine with rapid cooling and molding capability according to claim 1, characterized in that: It also includes a gas storage tank (206); the base frame (1) is fixedly connected with a gas storage tank (206) for recovering gas to reduce energy loss; the gas storage tank (206) is connected to the vent of the first communication cavity (1003) via a hose; and the gas storage tank (206) is connected to an external gas storage device.

6. The injection blow molding machine with rapid cooling and molding capability according to claim 1, characterized in that: The invention also comprises a sliding rod (207) and a first elastic member (208); a second connecting cavity (1004) is provided inside the bottom plate (10) to facilitate the bottom plate (10) to absorb the plastic bottle, and the second connecting cavity (1004) is connected to an external air extraction device; a sealing cavity (1005) is provided inside each bottom mold core (1001); a sliding rod (207) is slidably connected inside each sealing cavity (1005); and a first elastic member (208) is fixedly connected between each sliding rod (207) and the second connecting cavity (1004).

7. The injection blow molding machine with rapid cooling and molding capability according to claim 6, characterized in that: A snap ring portion (20701) is provided on the lower side of each sliding rod (207), and the snap ring portion (20701) is located at the connection between the sealing cavity (1005) and the second connecting cavity (1004); the diameter of the snap ring portion (20701) is set to be larger than the maximum diameter of the sealing cavity (1005).

8. The injection blow molding machine with rapid cooling and molding capability according to claim 6, characterized in that: It also includes a top block (209) and a second elastic member (210); each slide bar (207) is provided with a cavity (20702); each cavity (20702) is slidably connected to a top block (209); the top block (209) passes through the top surface of the slide bar (207), and the top block (209) passes through the upper surface of the bottom mold core (1001); the top block (209) is slidably connected to the bottom mold core (1001); the upper end surface of the top block (209) and the surface of the bottom mold core (1001) perfectly fit to form a complete bottom mold surface; and a second elastic member (210) is fixedly connected between each top block (209) and the upper top surface of the cavity (20702).

9. The injection blow molding machine with rapid cooling and molding capability according to claim 1, characterized in that: It also includes a lower pressing plate (211) and a slide plate (212); a plurality of lower pressing plates (211) are fixedly connected to the rotating plate (3); each lower pressing plate (211) is provided with an inclined portion (21101); a slide plate (212) for improving the sealing performance in the blow molding cavity is connected to the top plate (11) via a spring; two left-right symmetrical extrusion blocks (21201) are provided on the slide plate (212); the lowest point of the lower pressing plate (211) is set to be lower than the lowest point of the blow injection tube (5); and initially, the slide plate (212) covers the through hole (1101) of the top plate (11).

10. The injection blow molding machine with rapid cooling and molding capability according to claim 5, characterized in that: The invention also comprises an air intake pipe (301) and an annular pipe (302); each bottom mold core (1001) is provided with an annular groove (1006) on its outer side; the bottom plate (10) is fixedly connected with the air intake pipe (301); the air intake pipe (301) is connected with a plurality of annular pipes (302) for preventing water droplets from condensing on the surface of the plastic bottle; each annular pipe (302) is located in an adjacent annular groove (1006); the air intake pipe (301) is connected with the air storage tank (206) via a hose; and the annular pipe (302) is provided with a plurality of blowing holes arranged in an annular shape.

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