A short blow cycle bottle blow molder

Abstract

The utility model relates to bottle blowing machine technical field, concretely relates to bottle blowing machine of short blow molding period, it includes first lifting plate, upper guide pillar, lower guide pillar, upper roof, bottom plate, second lifting plate, first drive part, mesa board, second drive part, the top surface of mesa board is provided with injection mold and blow molding mould, the bottom surface of first lifting plate is provided with carousel assembly and is provided with servo motor on its top surface, the bottom surface of carousel assembly is provided with at least three groups of die head assembly, the bottom surface of second lifting plate is provided with air nozzle head, the utility model discloses utilize second drive part, first lifting plate, carousel assembly drive die head assembly to descend into blow molding mould, at the same time, utilize first drive part, second lifting plate drive air nozzle head synchronous descent and press against die head assembly, and then shorten the total travel of '' lifting frame'', and the time spent is relatively shorter, and it is favorable to improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of blow molding machine technology, and more specifically, it relates to a bottle blow molding machine with a short blow molding cycle. Background Technology

[0002] Most beverage bottles on the market are produced by blow molding machines. A blow molding machine is a machine that extrudes or injects thermoplastic resin or plastic to obtain a tubular preform. The preform is heated to a softened state and placed in a split mold. After the mold closing mechanism drives the mold to close, compressed air is immediately introduced into the preform, causing the plastic preform to inflate and adhere tightly to the inner wall of the mold. After cooling and demolding, various hollow products are produced.

[0003] The stage of inflating the preform into the bottle body involves two steps: first, the nozzle assembly descends into the blow mold; then, the air nozzle descends and presses against the nozzle assembly, thereby introducing compressed gas into the preform. Most existing bottle blow molding machines indirectly drive the nozzle assembly and air nozzle to descend sequentially via a single drive component. For example... Figure 1 As shown, the nozzle assembly and the air nozzle head descend as a whole by the drive component and the lifting frame, a first distance D1. At this time, the nozzle assembly enters the blow mold, but the air nozzle head does not press against the nozzle assembly. Then the lifting frame continues to descend a second distance D2. At this time, the nozzle assembly is still in the blow mold, and the air nozzle head has descended and pressed against the nozzle assembly.

[0004] However, the total stroke of the lifting frame in the above structure is the sum of the first distance D1 and the second distance D2. This total stroke is driven by a single drive unit, which takes a relatively long time and is not conducive to improving production efficiency. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a bottle blow molding machine to solve the technical problem of long blow molding cycle of existing bottle blow molding machines.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A bottle blow molding machine with a short blow molding cycle includes a first lifting plate, a plurality of upper guide columns disposed on the top surface of the first lifting plate, a plurality of lower guide columns disposed on the bottom surface of the first lifting plate, an upper top plate disposed on the top of the plurality of upper guide columns, a lower bottom plate disposed at the bottom of the plurality of lower guide columns, a second lifting plate slidably disposed in the middle of the plurality of upper guide columns, a first driving member disposed at the bottom of the upper top plate and used to drive the second lifting plate to slide in the vertical direction, a table panel slidably disposed in the middle of the plurality of lower guide columns, and a second driving member disposed at the bottom of the table panel and used to drive the lower bottom plate to slide in the vertical direction.

[0008] The top surface of the platform is provided with an injection mold for forming a preform and a blow mold for inflating the preform into a bottle body; the bottom surface of the first lifting plate is rotatably provided with a turntable assembly, and the top surface of the turntable assembly is provided with a servo motor for driving the turntable assembly to rotate; the bottom surface of the turntable assembly is provided with at least three sets of nozzle assemblies for adapting to the injection mold to thermoform the plastic into a preform and for conveying the preform to the blow mold; the bottom surface of the second lifting plate is provided with an air nozzle for sliding and pressing against the nozzle assembly to convey compressed gas to the preform.

[0009] Optionally, the turntable assembly includes a turntable, and the bottom surface of the turntable is provided with a plurality of quick-release locking parts arranged in an equally spaced circumferential array for locking the nozzle assembly on the turntable. The quick-release locking parts slide and engage with the nozzle assembly.

[0010] Optionally, a limiting sleeve is provided on the outer side of the upper guide post to prevent the second lifting plate from abutting against the first lifting plate.

[0011] Optionally, the quick-release locking component includes two fixing blocks located at one end and the other end of the die assembly, respectively. Both ends of the fixing blocks are provided with connecting bolts. A slider for movably engaging the die assembly is slidably disposed in the middle of the fixing blocks. Both ends of the slider are provided with connecting through holes for accommodating the connecting bolts. The connecting bolts pass through the connecting through holes and are fixed to the fixing blocks. A spring for driving the slider to engage the die assembly is disposed in the connecting through holes. The spring is sleeved on the connecting bolt. One end of the spring abuts against the connecting bolt, and the other end abuts against the slider. The fixing blocks are fixedly connected to the turntable and slidably connected to the die assembly.

[0012] Optionally, the nozzle assembly includes a detachable connecting plate, which is provided with several nozzles for adapting to the injection mold to thermoform the plastic into a preform and for fixing and conveying the preform to the blow mold under the action of the turntable. The bottom of the nozzle is provided with a mandrel for extending into the internal space of the preform. Both ends of the detachable connecting plate are provided with slots corresponding to the sliders, and the sliders are movably engaged in the slots. The air nozzle head moves to press against and seal the top opening of the mandrel, thereby delivering compressed gas into the preform through the mandrel.

[0013] Optionally, both the first and second driving components can be hydraulic cylinders or electric cylinders.

[0014] Compared with the prior art, this utility model has the following advantages: the second driving component, the first lifting plate, and the turntable assembly drive the nozzle assembly to descend and enter the blow mold. At the same time, the first driving component and the second lifting plate drive the air nozzle head to descend synchronously and press against the nozzle assembly, thereby shortening the total stroke of the "lifting frame" and reducing the time required, which helps to improve production efficiency. Attached Figure Description

[0015] Figure 1 This is a partial structural diagram of an existing bottle blow molding machine;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the turntable assembly and the die assembly in this utility model;

[0018] Figure 4 This is a structural schematic diagram of the quick-release locking component in this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the nozzle assembly in this utility model;

[0020] Figure 6 This is a side view of the nozzle assembly in this utility model;

[0021] Figure 7 yes Figure 6 Sectional view at section AA;

[0022] Figure 8 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0023] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] A bottle blow molding machine with a short blow molding cycle, such as Figure 2-8 As shown, it includes a first lifting plate 1, a plurality of upper guide columns 2 disposed on the top surface of the first lifting plate 1, a plurality of lower guide columns 3 disposed on the bottom surface of the first lifting plate 1, an upper top plate 4 disposed on the top of the plurality of upper guide columns 2, a lower bottom plate 5 disposed at the bottom of the plurality of lower guide columns 3, a second lifting plate 6 slidably disposed in the middle of the plurality of upper guide columns 2, a first driving member 7 disposed at the bottom of the upper top plate 4 and used to drive the second lifting plate 6 to slide in the vertical direction, a platform 8 slidably disposed in the middle of the plurality of lower guide columns 3, and a second driving member 9 disposed at the bottom of the platform 8 and used to drive the lower bottom plate 5 to slide in the vertical direction.

[0026] The top surface of the platform 8 is provided with an injection mold 81 for forming a preform and a blow mold 82 for inflating the preform into a bottle body; the bottom surface of the first lifting plate 1 is rotatably provided with a turntable assembly 11, and the top surface of the turntable assembly 11 is provided with a servo motor 12 for driving the turntable assembly 11 to rotate; the bottom surface of the turntable assembly 11 is provided with at least three sets of nozzle assemblies 13 for adapting to the injection mold 81 to thermoform the plastic into a preform and for conveying the preform to the blow mold 82; the bottom surface of the second lifting plate 6 is provided with an air nozzle 61 for sliding and pressing against the nozzle assembly 13 to convey compressed gas to the preform.

[0027] Specifically, the table panel 8 is fixedly installed on the left end of the frame with screws, and the injection molding machine is installed on the right end of the frame. Four lower guide pillars 3 are located at the corners of the table panel 8 and penetrate through it, allowing them to slide vertically up and down. The first lifting plate 1 and the lower base plate 5 are fixedly installed on the top and bottom of the four lower guide pillars 3 with screws, respectively. The second driving component 9 is a hydraulic cylinder or electric cylinder, with its fixed end installed on the bottom surface of the table panel 8 and its movable end fixedly connected to the lower base plate 5, used to indirectly drive the first lifting plate 1 to slide vertically up and down. The lower ends of the four upper guide pillars 2 are located at the corners of the first lifting plate 1, with their middle sections penetrating the second lifting plate 6, and their upper ends fixedly connected to the upper top plate 4 with screws. The lower base plate 5, the four lower guide pillars 3, the first lifting plate 1, the four upper guide pillars 2, and the upper top plate 4 form a "lifting frame". The first driving component 8 is a hydraulic cylinder or electric cylinder. Its fixed end is installed on the bottom surface of the upper top plate 4, and its movable end is fixedly connected to the second lifting plate 6. It is used to indirectly drive the air nozzle head 61 to slide up and down in the vertical direction. The air nozzle head 61 is installed on the bottom surface of the second lifting plate 6, and its number can be set as needed. The servo motor 12 is a servo motor with a reduction function. It is installed on the top surface of the first lifting plate 1 by screws. Its output shaft passes through the first lifting plate 1 and is fixedly connected to the center part of the turntable assembly 11, thereby driving the turntable assembly 11 to rotate. The turntable assembly 11 is rotatably connected to the first lifting plate 1 through bearings.

[0028] The steps of this invention to inflate a preform into a bottle body are as follows: The second driving member 9 drives the lower base plate 5 to slide downwards by a first distance D1, and indirectly drives the nozzle assembly 13 into the blow mold 82 through the "lifting frame" and turntable assembly 11 in sequence; at the same time, the first driving member 7 indirectly drives the air nozzle head 61 to slide downwards by a certain distance through the second lifting plate 6, and presses against the top air inlet of the nozzle assembly 13; the air nozzle head 61 inputs compressed gas into the preform to inflate the preform into a bottle body; then the second driving member 9 and the first driving member 7 move in opposite directions at the same time, respectively driving the nozzle assembly 13 to exit the blow mold 82 and the air nozzle head 61 to move away from the nozzle assembly 13; the servo motor 12 drives the turntable assembly 11 to rotate 120 degrees, and the bottle body is transferred to the next part station. The freshly injection-molded preform is transferred from directly above the injection mold 81 to directly above the blow mold 82. Then the second driving member 9 and the first driving member 7 move downwards at the same time to perform the next round of blow molding.

[0029] The improvement of this utility model lies in the simultaneous operation of the second driving component 9 and the first driving component 7, so that when the nozzle assembly 13 enters the blow mold 82, the air nozzle head 61 simultaneously presses against the blow mold 82, shortening the pre-blow molding action time (denoted as the mold closing time), thereby improving production efficiency. Figure 1 Taking the bottle blow molding machine shown in the diagram as an example, the stroke of the nozzle 61 from its initial position downwards to the blow molding position is 600mm (the first distance D1 is 300mm at the front and the second distance D2 is 300mm at the rear), the mold closing time is 3.5s, the time for inflating the preform is 20s, and the mold opening time for the nozzle 61 to slide upwards to the initial position is also 3.5s. The total blow molding cycle is 3.5s + 20s + 3.5s = 27s. In this application, the mold closing time for the nozzle 61 from its initial position downwards to the blow molding position is 1.75s, the time for inflating the preform is 20s, and the mold opening time for the nozzle 61 to slide upwards to the initial position is also 1.75s. The total blow molding cycle is 1.75s + 20s + 1.75s = 23.5s, resulting in a production efficiency increase of (27s - 23.5s) / 27s = 12.96%.

[0030] Furthermore, the turntable assembly 11 includes a turntable 111, and the bottom surface of the turntable 111 is provided with a plurality of quick-release locking parts 112 for locking the nozzle assembly 13 onto the turntable 111 at equal intervals. The quick-release locking parts 112 slide and engage with the nozzle assembly 13.

[0031] like Figure 3 As shown, the turntable 111 is rotatably mounted on the bottom surface of the first lifting plate 1 via bearings. Three quick-release locking elements 112 are evenly spaced on the bottom surface of the turntable 111, with an included angle of 120 degrees between adjacent quick-release locking elements 112. The nozzle assembly 13 is detachably slidably engaged with the quick-release locking elements 112.

[0032] Furthermore, a limiting sleeve 21 is provided on the outer side of the upper guide post 2 to prevent the second lifting plate 6 from abutting against the first lifting plate 1.

[0033] like Figure 2 As shown, the limiting sleeve 21 is made of a high modulus elastic material and is sleeved on the outside of the upper guide post 2. This prevents the second lifting plate 6 from getting too close to the first lifting plate 1, thereby avoiding damage to the servo motor 12 times.

[0034] Furthermore, the quick-release locking component 112 includes two fixing blocks 1121 located at one end and the other end of the die assembly 13, respectively. Both ends of the fixing blocks 1121 are provided with connecting bolts 1122. A slider 1123 for movably engaging the die assembly 13 is slidably disposed in the middle of the fixing blocks 1121. Both ends of the slider 1123 are provided with connecting through holes 11231 for accommodating the connecting bolts 1122. The connecting bolts 1122 pass through the connecting through holes 11231 and are fixed to the fixing blocks 1121. A spring 1124 for driving the slider 1123 to engage the die assembly 13 is housed in the connecting through holes 11231. The spring 1124 is sleeved on the connecting bolts 1122. One end of the spring 1124 abuts against the connecting bolts 1122, and the other end abuts against the slider 1123. The fixing blocks 1121 are fixedly connected to the turntable 111 and slidably connected to the die assembly 13.

[0035] like Figure 3-7 As shown, there are two fixing blocks 1121, which are used to fix the two ends of the nozzle assembly 13 respectively, and are fixed to the turntable 111 by bolts. The slider 1123 is T-shaped and is slidably engaged with the fixing blocks 1121 by the cooperation of the connecting bolt 1122 and the spring 1124. The slider 1123 normally engages the nozzle assembly 13 when no external force is applied. When the nozzle assembly 13 needs to be replaced, the slider 1123 is pulled away from the nozzle assembly 13 by hand, and then the nozzle assembly 13 is pulled out to complete the removal of the nozzle assembly 13. A nozzle assembly 13 of another specification is slidably inserted between the two fixing blocks 1121, and then the slider 1123 is released so that the slider 1123 is inserted into the slot 1311 to complete the installation of the nozzle assembly 13. The replacement of the nozzle assembly 13 can be completed simply by pushing and pulling the slider 1123, which is convenient and quick.

[0036] Furthermore, the nozzle assembly 13 includes a separable connecting plate 131, on which a plurality of nozzle molds 132 are provided for adapting to the injection mold 81 to thermoform the plastic into a preform and for fixing and conveying the preform to the blow mold 82 under the action of the turntable 111. The bottom of the nozzle mold 132 is provided with a mandrel 133 for extending out of the internal space of the preform. Both ends of the separable connecting plate 131 are provided with slots 1311 corresponding to the slider 1123, and the slider 1123 is movably engaged in the slots 1311. The air nozzle head 61 is movably pressed against and seals the top opening of the mandrel 133, thereby delivering compressed gas into the preform through the mandrel 133.

[0037] like Figure 3-7 As shown, the detachable connecting plate 131 consists of two half-plates connected by bolts. Three nozzle molds 132 are fixedly installed along its length via the interlocking structure of the two half-plates. The nozzle molds 132 are inserted into the bottle neck of the preform, securing the preform with an interference fit. A mandrel 133 is threaded onto the nozzle mold 132. The mandrel 133 delivers compressed gas into the preform through an air guide hole (not shown in the attached diagram) at its bottom, thereby inflating the preform within the blow molding mold 82 cavity. The detachable connecting plate 131, composed of two half-plates connected by bolts, allows for individual replacement of the nozzle molds 132 when wear occurs, preventing the entire nozzle assembly 13 from being scrapped.

[0038] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A bottle blow molding machine with a short blow molding cycle, characterized in that, It includes a first lifting plate, a plurality of upper guide columns disposed on the top surface of the first lifting plate, a plurality of lower guide columns disposed on the bottom surface of the first lifting plate, an upper top plate disposed on the top of the plurality of upper guide columns, a lower bottom plate disposed on the bottom of the plurality of lower guide columns, a second lifting plate slidably disposed in the middle of the plurality of upper guide columns, a first driving member disposed at the bottom of the upper top plate and used to drive the second lifting plate to slide in the vertical direction, a platform slidably disposed in the middle of the plurality of lower guide columns, and a second driving member disposed at the bottom of the platform and used to drive the lower bottom plate to slide in the vertical direction. The top surface of the platform is provided with an injection mold for forming a preform and a blow mold for inflating the preform into a bottle body; the bottom surface of the first lifting plate is rotatably provided with a turntable assembly, and the top surface of the turntable assembly is provided with a servo motor for driving the turntable assembly to rotate; the bottom surface of the turntable assembly is provided with at least three sets of nozzle assemblies for adapting to the injection mold to thermoform the plastic into a preform and for conveying the preform to the blow mold; the bottom surface of the second lifting plate is provided with an air nozzle for sliding and pressing against the nozzle assembly to convey compressed gas to the preform.

2. The bottle blow molding machine according to claim 1, characterized in that, The turntable assembly includes a turntable, and the bottom surface of the turntable is provided with a number of quick-release locking parts arranged in an equally spaced circumferential array to lock the nozzle assembly on the turntable; the quick-release locking parts slide and engage with the nozzle assembly.

3. The bottle blow molding machine according to claim 1, characterized in that, The outer side of the upper guide post is fitted with a limiting sleeve to prevent the second lifting plate from abutting against the first lifting plate.

4. The bottle blow molding machine according to claim 2, characterized in that, The quick-release locking component includes two fixing blocks located at one end and the other end of the die assembly, respectively. Both ends of the fixing blocks are provided with connecting bolts. A slider for moving and engaging the die assembly is slidably arranged in the middle of the fixing blocks. Both ends of the slider are provided with connecting through holes for accommodating the connecting bolts. The connecting bolts pass through the connecting through holes and are fixed to the fixing blocks. A spring for driving the slider to engage the die assembly is housed in the connecting through holes. The spring is sleeved on the connecting bolt. One end of the spring abuts against the connecting bolt, and the other end abuts against the slider. The fixing blocks are fixedly connected to the turntable and slidably connected to the die assembly.

5. The bottle blow molding machine according to claim 4, characterized in that, The nozzle assembly includes a detachable connecting plate, which is equipped with several nozzles for adapting to the injection mold to thermoform the plastic into a preform and for fixing and conveying the preform to the blow mold under the action of the turntable. The bottom of the nozzle is provided with a mandrel for extending into the internal space of the preform. Both ends of the detachable connecting plate are provided with slots corresponding to the sliders, and the sliders are movably engaged in the slots. The air nozzle head moves to press against and seal the top opening of the mandrel, thereby delivering compressed gas into the preform through the mandrel.

6. The bottle blow molding machine according to claim 1, characterized in that, Both the first and second driving components are hydraulic cylinders or electric cylinders.

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