Injection-blowing machine

Abstract

The present invention relates to an injection-blowing machine. The core of the existing injection-blowing machine needs to be separated from the bottle blank, which affects the processing efficiency. The present invention includes a frame, and the frame is provided with an injection molding mechanism with an injection molding cavity, a bottle blowing mechanism with a bottle blowing cavity, and a conveying mechanism. The conveying mechanism includes a core and a half clamp. The core is inserted into the injection molding cavity and injection-molded to form a bottle blank. The half clamp grabs the bottle blank at the injection molding mechanism and conveys it to the bottle blowing mechanism. The core inserted in the bottle blank moves synchronously with the half clamp into the bottle blowing cavity and blows the bottle blank into a bottle body. The core is arranged on the conveying mechanism, and moves synchronously with the half clamp holding the bottle blank and the bottle blank formed by the injection molding mechanism, so that the core does not need to be pulled out when the bottle blank is transported, which not only shortens the rising distance of the core, and improves the processing efficiency by shortening the duration of a single injection molding process, but also reduces the rising height of the core without reserving too much rising space for the core, thereby effectively reducing the height of the blow-injection machine and improving the user experience.

Description

Technical Field

[0001] The invention relates to the field of plastic processing, and in particular to an injection-blowing integrated machine. Background Art

[0002] The existing injection-blowing machine has the functions of both preform injection molding and bottle body blowing, and can process granular raw materials into bottle bodies in one step. The existing injection-blowing machine includes a frame, an injection molding mechanism, a bottle blowing mechanism and a transportation mechanism arranged on the frame. The injection molding mechanism is used to inject and form the preform. The transportation mechanism is used to transport the preform formed by the injection molding mechanism to the bottle blowing mechanism. The bottle blowing mechanism is used to blow the preform into a bottle body. The injection molding mechanism includes an injection molding cavity and an injection molding core that can be inserted into the injection molding cavity. The bottle blowing mechanism includes a bottle blowing cavity and a stretching tube that can be inserted into the bottle blowing cavity.

[0003] When in use, the preform processed in the injection molding mechanism first rises to a height that separates it from the mold cavity when the mold is opened, and then rises to a height that separates it from the tube itself. The preform is then clamped by the half clamp and horizontally transferred to the bottle blowing mechanism, and then falls into the bottle blowing cavity. The stretching mechanism then drives the stretching rod to insert the preform for stretching and bottle blowing, resulting in a long mold opening distance for the injection molding cavity and a large rising distance for the injection molding core, which will not only cause the time required for a single injection by the injection molding mechanism to be lengthened due to the increased displacement distance of the injection molding core, but will also increase the height of the blow molding machine due to the larger rising space required for the injection molding core, and require a stretching sealing structure to be set when the preform and the half clamp are moved to the bottle blowing cavity, thereby affecting production efficiency and increasing production costs. Summary of the invention

[0004] In order to address the deficiencies of the prior art, the present invention provides an injection-blow molding machine, in which a core body that can be linked with the bottle blank is arranged on the conveying mechanism. This not only shortens the time required for a single injection molding process by shortening the rising distance of the core body and improving the processing efficiency, but also effectively reduces the height of the injection-blow molding machine and improves the user experience.

[0005] The present invention is realized in the following manner: an injection-blowing machine comprises a frame, on which an injection molding mechanism with an injection molding cavity, a bottle blowing mechanism with a bottle blowing cavity and a conveying mechanism are arranged, the conveying mechanism comprises an axially retractable core body and a half clamp that can be opened and closed, the core body is inserted into the injection molding cavity and injection-molded to form a bottle blank, the half clamp cooperates with the core body at the injection molding mechanism to grab the bottle blank and convey it to the bottle blowing mechanism, the core body inserted in the bottle blank moves synchronously with the half clamp to the bottle blowing cavity and blows the bottle blank into a bottle body. The core is set on the conveying mechanism, and moves synchronously with the half clamp holding the preform and the preform formed by the injection molding mechanism, so that the core does not need to be pulled out when the preform is transported, and it is used as a stretching rod during stretching and blowing, eliminating the stretching rod and stretching mechanism. The core rise distance is shortened by eliminating the action of pulling out the preform, and the core rise distance is reduced to half of the original, so that the core saves half of the empty pulling stroke, and the processing efficiency is improved by shortening the duration of a single injection molding process. It also saves time by reducing the core rise height without reserving too much rising space for the core and the distance for the stretching rod to be inserted into the preform again, thereby reducing the height of the blow molding machine and improving the user experience. The core has the functions of both the injection core and the stretching tube during use. It can be inserted into the injection cavity to realize the function of the injection core and complete the injection operation, and can also be stretched downward through the core in the blowing cavity and blow the bottle, eliminating the stretching mechanism and the sealing mechanism, improving production efficiency and saving manufacturing costs, ensuring that the preform will not be eccentric, and ensuring quality. At the same time, the core is equipped with hot and cold temperature control components to ensure that the temperature of the preform is always maintained within the temperature range required for processing.

[0006] Preferably, the conveying mechanism includes a movable platform, and the core body can be vertically lifted and lowered and installed on the movable platform, so that the core body can be moved and plugged in and out between the injection molding cavity and the bottle blowing cavity. The core body is lifted and lowered vertically, and can be plugged in with the injection molding cavity or the bottle blowing cavity with the cavity opening facing upward. Specifically, the core body is vertically inserted in the bottle blowing cavity and acts as a stretching tube. By utilizing the space above the injection molding mechanism to provide the core body with sufficient lifting and adjusting space and power to pull downward, it is ensured that the core body meets the requirements of moving downward and conveying high-pressure air during the bottle blowing operation; the core body is vertically inserted in the injection molding cavity and enclosed to form a closed chamber for raw material infusion. By reducing the projection area of ​​the core body along its insertion direction, the force applied during injection molding is reduced, and multi-cavity and multi-row production can be realized, and production efficiency is improved. The limit assembly has the effect of simplifying the structure and reducing the structural strength requirements, which not only reduces processing costs, but also improves injection molding reliability and prevents the core body from detaching from the injection molding cavity during injection molding.

[0007] Preferably, the conveying mechanism includes a limiting component, and the core body is vertically inserted into the injection molding cavity and is positioned by the limiting component, so that the injection molding cavity, the half clamp, and the core body are surrounded to form a closed chamber isolated from the outside space and for raw material infusion. By setting the limiting component, the core body is effectively positioned during the injection molding operation, so that the inner side wall of the injection molding cavity, the clamping cavity of the half clamp, and the outer side wall of the core body are matched to form a closed chamber for injection molding, ensuring that the contour of the produced bottle blank meets the design requirements and ensures product quality.

[0008] Preferably, the limiting assembly includes a limiting ring sleeved on the core body, the limiting ring is fixedly connected to the movable table, ensuring that the core body can only be stretched downward to blow the bottle and cannot rise upward, the bottom inner edge of the limiting ring extends downward to form a clamping ring, and the outer wall of the core body is provided with a supporting ring surface facing upward, the supporting ring surface is forced to rise and is clamped and positioned by the limiting ring, and after the core body is inserted into the injection cavity, the movable table drives the limiting ring to move from top to bottom and abuts against the supporting ring surface through the clamping ring to limit the upward displacement of the core body. The limiting ring is vertically overlapped and limited by the clamping ring arranged below it and the supporting ring surface on the core body, ensuring that the core body is always suspended at a preset height in the injection cavity, thereby ensuring that the wall thickness of the output bottle blank meets the design requirements. The clamping ring is sleeved on the core body to ensure that the two are kept concentrically connected, thereby ensuring that the contour of the closed chamber remains unchanged and the uniformity of the product contour is ensured.

[0009] Preferably, the outer wall diameter of the retaining ring matches the inner wall diameter of the bottle blank opening. After the limiting ring is locked in place, the retaining ring is suspended in the half clamp and the raw material is poured to form the blank opening. The outer wall of the retaining ring forms a partial inner wall of the closed chamber, which plays a shaping role for the raw material. Specifically, the outer wall of the retaining ring cooperates with the wall surface of the clamping cavity of the half clamp to form an area for injection molding to form the bottle blank opening.

[0010] Preferably, the outer edge diameter of the bottom surface of the retaining ring matches the outer edge diameter of the supporting ring surface, so that the two are smoothly connected, and the inner edge diameter of the bottom surface of the retaining ring matches the inner edge diameter of the supporting ring surface, so that the inner side wall of the retaining ring matches and fits with the outer side wall of the core body. The vertical projections between the bottom surface of the retaining ring and the supporting ring surface overlap with each other, which not only ensures that there is a maximum contact area between the two, but also ensures that the outer side wall of the retaining ring is smoothly connected with the outer side wall of the core body located below the supporting ring surface, and the inner side wall of the retaining ring is tightly fitted with the outer side wall of the core body located above the supporting ring surface, which plays a role in radial positioning of the retaining ring.

[0011] Preferably, the outer edge of the bottom surface of the limiting ring is provided with an upper convex rib, the periphery of the cavity opening of the injection cavity is provided with a lower convex rib, and the top and bottom surfaces of the half clamp are provided with an upper positioning groove and a lower positioning groove, respectively. When the first lifting assembly drives the limiting ring to move downward through the movable platform and vertically clamps the half clamp with the cavity opening of the injection cavity, the upper convex rib and the lower convex rib are respectively vertically inserted into the upper positioning groove and the lower positioning groove, so that the half clamp is closed and locked. The plug-in direction between the upper convex rib and the upper positioning groove, and between the lower convex rib and the lower positioning groove are perpendicular to the opening and closing direction of the half clamp, ensuring that the half clamp has good positioning stability during injection molding. Specifically, only when the upper convex rib and the upper positioning groove, and the lower convex rib and the lower positioning groove are disengaged, can the half clamp be opened to ensure the stability of the half clamp in gripping the preform. The lower convex rib and the lower positioning groove are disengaged when the mold is opened, and the half clamp, the core body and the bottle blank are moved into the bottle blowing cavity together. After the bottle blowing operation is completed, the half clamp is vertically disengaged from the movable table, so that the upper convex rib and the upper positioning groove are disengaged. At this time, the half clamp is opened and disengaged from the bottle body, causing the bottle body to fall downward.

[0012] Preferably, the conveying mechanism includes a bottle blowing assembly, which includes a blowing hole provided on a limiting ring and a blowing groove provided vertically on the outer wall of the core body. The core body moves downward and guides the high-pressure air in the blowing hole into the bottle blank through the blowing groove, so that the bottle blank is blown into a bottle body. When the core body is inserted into the bottle blowing, it plays the role of a stretching tube, which can not only continuously deliver high-pressure air to the bottle blank, but also control the downward extension and positioning of the core body, and always deliver high-pressure air to the inside of the bottle blank to ensure the quality of bottle blowing. The outer port of the blowing hole is connected to the external high-pressure air source, and the inner port can always be connected to the blowing groove when the core body extends downward, ensuring the stability and continuity of high-pressure air delivery and ensuring uniform expansion of the bottle blank. During the blowing process, the blowing groove spans between the blowing hole and the inner cavity of the bottle blank and is isolated from the external space.

[0013] Preferably, the Huff clamp is installed on the bottom surface of the movable platform through a liftable fixing plate, so that the Huff clamp can be lifted and lowered independently relative to the movable platform. By setting a liftable fixing plate to drive the Huff clamp to be lifted and lowered independently relative to the movable platform, it is ensured that the Huff clamp can realize vertical plug-in and pull-out switching of the upper convex rib and the upper positioning groove through independent lifting, so that the Huff clamp can be smoothly opened and closed. In addition, the Huff clamp can realize relative displacement with the core body through vertical lifting, so that the core body can realize relative displacement with the bottle blank or bottle body, which is convenient for the core body to be pulled out.

[0014] Preferably, the bottle blowing mechanism is two and is disposed on both sides of the injection molding mechanism. The conveying mechanism includes two groups of cores corresponding to the bottle blowing mechanisms one by one. The cores can be installed in the movable table in a lifting manner so that the cores can move horizontally synchronously. The single processing time of the injection molding mechanism is shorter than the single processing time of the bottle blowing mechanism. By setting two groups of bottle blowing mechanisms to alternately receive and blow the preforms from the injection molding mechanism, the conveying mechanism is provided with a movable table that drives the cores to lift and translate synchronously, ensuring that the preforms produced by the injection molding mechanism are accurately and alternately conveyed to the bottle blowing mechanisms on both sides, effectively improving production efficiency. During the production process, the conveying mechanism will participate in the injection molding operation and the bottle blowing operation at the same time through different cores, which effectively prevents mutual interference between the cores and ensures production efficiency. The cores are all installed on the same movable table to ensure that the cores can move back and forth between the injection molding mechanism and the corresponding bottle blowing mechanism.

[0015] Preferably, the number of injection molding cavities matches the number of blowing cavities in a single blowing mechanism, the injection molding mechanism continuously produces bottle blanks and they are alternately transported to the corresponding blowing mechanisms, and the bottle blanks produced by the injection molding mechanism at a time can be alternately received by the two blowing mechanisms and blown into bottle bodies, thereby effectively improving the processing efficiency and preventing the bottle blanks from being squeezed.

[0016] Preferably, the injection mold is provided with multiple rows of injection cavities, and the relative positions of the injection cavities match and correspond to the relative positions of the blowing cavities on each blowing mechanism. The injection mechanism can process multiple preforms simultaneously by providing multiple injection cavities, and each blowing mechanism can effectively receive and process the preforms formed by a single processing of the injection mechanism, thereby improving processing efficiency and saving energy.

[0017] Preferably, the conveying mechanism includes a first lifting assembly that drives the core body and the movable table to rise and fall synchronously, a second lifting assembly that can drive the core body to stretch the preform downward in the bottle blowing cavity, and a translation assembly that drives the core body located at the extraction station to drive the movable table to move back and forth between the injection molding mechanism and the bottle blowing mechanism. The movable table suspends the bottom of the first lifting assembly through the translation assembly, so that the translation assembly rises and falls synchronously with the movable table under the drive of the first lifting assembly. The fixed end of the first lifting assembly is fixed to the frame, the telescopic end is fixed to the injection molding mobile template, the movable part of the first lifting assembly is fixed to the translation assembly, the movable part of the translation assembly is fixed to the movable table, the movable table provides fixed support for the second lifting assembly, and the movable part of the second lifting assembly is fixed to the top of the core body. When in use, the first lifting assembly can drive the translation assembly, the movable table and the core body to rise and fall synchronously, so that the core body can switch between the extraction station and the insertion station. The translation assembly can drive the movable table and the core body to translate synchronously, so that the core body can translate back and forth between the injection molding mechanism and the bottle blowing mechanism, so that the preform, the half clamp and the core body can be transported synchronously. The second lifting assembly can drive each core body to rise and fall independently, so that the preform in the bottle blowing cavity can be blown into a bottle body. When the first lifting assembly drives the connecting table to rise, the half clamp opens the half, and the core body rises and separates from the blown bottle body, so that the bottle body falls off.

[0018] Preferably, the top of the first lifting assembly is fixed to the frame, and the bottom drives the translation assembly to rise and fall through the injection molding motorized template, so that the first lifting assembly drives the core body to rise and fall between the insertion station of the injection molding cavity or the bottle blowing cavity and the extraction station of the injection molding cavity or the bottle blowing cavity through the translation assembly and the movable table in turn. The first lifting assembly can drive the core body and the half clamp on the movable table to rise and fall synchronously, so that the preform formed by injection molding in the closed chamber is pulled out of the injection molding cavity.

[0019] Preferably, the translation assembly includes an injection molding motorized template fixedly connected to the first lifting assembly and a driving unit driving the movable platform to reciprocate along the injection molding motorized template, and the injection molding motorized template is provided with a track for the movable platform to translate. The injection molding motorized template provides horizontal positioning support for the driving unit, so that the driving unit can smoothly drive the movable platform to reciprocate along the track between the injection molding mechanism and the bottle blowing mechanism. When in use, the first lifting assembly can play a role in horizontally limiting the injection molding motorized template, ensuring that the movable platform is accurately displaced under the drive of the driving unit.

[0020] Preferably, the movable platform includes a top plate connected to the translation assembly and a bottom plate suspended below the top plate. The movable platform is arranged below the injection molding motorized template. The bottom of the second lifting assembly is arranged on the movable platform, and the top is fixedly connected to the top of the core body, so that the core body can be independently lifted and lowered when the movable platform is stationary. The movable platform is a box-type structure, which has a space for accommodating the second lifting assembly. The bottom plate and the top plate are matched and fixed to ensure that the relative positions of the top plate and the bottom plate are fixed and always remain parallel to each other, thereby ensuring that the top plate can drive the second lifting assembly, the core body and the half clamp to move synchronously through the movable platform when subjected to vertical or horizontal forces from the translation assembly. The top plate can slide horizontally along the track, which not only guides the horizontal movement of the movable platform, but also bears the gravity of the movable platform. The bottom plate can provide positioning support for the second lifting assembly, ensuring that the core body can be lifted and lowered relative to the movable platform.

[0021] The outstanding beneficial effects of the present invention are as follows: the core body is arranged on the conveying mechanism, and moves synchronously with the half clamp that clamps the bottle blank and the bottle blank formed by the injection molding mechanism, so that the core body does not need to be pulled out when the bottle blank is transported, and the rising distance of the core body is shortened by eliminating the action of pulling out the bottle blank, and the stretching length of the core body is shortened when blowing the bottle, and the processing efficiency is improved by shortening the duration of a single injection molding process. The rising height of the core body is reduced, and there is no need to reserve too much rising space for the core body, thereby effectively reducing the height of the blow-injection integrated machine, eliminating the stretching sealing structure, and using the core body as a stretching rod to shorten the stretching stroke by at least half, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a partial cross-sectional structural schematic diagram of the bottle blank, the core body and the half clamp when they are separated from the injection molding cavity;

[0023] Figure 2 It is a partial cross-sectional structural schematic diagram of the injection-blow molding machine;

[0024] Figure 3 It is a partial cross-sectional structural schematic diagram of the core body when the bottle body is blown under the driving of the second lifting assembly;

[0025] Figure 4 It is a schematic diagram of a partial cross-sectional structure when the half clamp is opened;

[0026] Figure 5 A schematic diagram of a radial cross-sectional structure of a core body having a blowing groove section;

[0027] Figure 6 This is a schematic diagram of the structure of the integrated machine;

[0028] Figure 7 Schematic diagram of the assembly structure of the fixing plate and the half clamp;

[0029] In the figure: 1, frame, 2, injection cavity, 3, injection mechanism, 4, bottle blowing cavity, 5, bottle blowing mechanism, 6, conveying mechanism, 7, core, 8, half clamp, 9, movable table, 10, limit ring, 11, clamping ring, 12, supporting ring surface, 13, upper convex rib, 14, lower convex rib, 15, upper positioning groove, 16, lower positioning groove, 17, blowing hole, 18, blowing groove, 19, second lifting assembly, 20, bottle blank, 21, track, 22, top plate, 23, driving plate, 24, injection motor template, 25, fixing plate, 26, first lifting assembly, 27, translation assembly. DETAILED DESCRIPTION

[0030] The essential features of the present invention are further described below in conjunction with the accompanying drawings and specific implementation methods.

[0031] like Figure 1 and 2 The injection-blowing machine shown is composed of a frame 1, on which an injection molding mechanism 3 with an injection molding cavity 2, a bottle blowing mechanism 5 with a bottle blowing cavity 4 and a conveying mechanism 6 are provided, and is characterized in that the conveying mechanism 6 includes a core body 7 which can be axially extended and inserted in the bottle blank and a half clamp 8 which can be opened and closed. The core body is inserted in the injection molding cavity and injection-molded to form the bottle blank. The half clamp 8 grabs the bottle blank 20 at the injection molding mechanism 3 and conveys it to the bottle blowing mechanism 5. The core body 7 inserted in the bottle blank moves synchronously with the half clamp 8 to the bottle blowing cavity 4 and blows the bottle blank into a bottle body. The core body 7 is synchronously moved to the bottle blowing cavity 4 after the bottle blank 20 is pulled out of the injection cavity 2 by the half clamp 8. The core body 7 has the functions of the injection core and the stretching tube in the original integrated machine structure, so that the core body 7 does not need to be pulled out when the bottle blank 20 is transported. The rising distance of the core body 7 is shortened by eliminating the action of pulling out the bottle blank 20, and the processing efficiency is improved by shortening the duration of a single injection molding process. The rising height of the core body 7 is reduced, and there is no need to reserve too much rising space for the core body 7, thereby effectively reducing the height of the blow-injection integrated machine and improving the user experience.

[0032] In actual operation, the conveying mechanism 6 includes a movable table 9, and the core body 7 can be installed on the movable table 9 in a vertically lifting manner, so that the core body 7 can be moved and plugged in and out between the injection molding cavity 2 and the bottle blowing cavity 4. The movable table 9 can reciprocate between the injection molding mechanism 3 and the bottle blowing mechanism 5. The half clamp 8 is arranged on the bottom surface of the movable table 9, which can be linked with the movable table 9 and conveniently clamp the blank mouth of the bottle blank. Specifically, the conveying mechanism 6, the injection molding mechanism 3 and the bottle blowing mechanism 5 realize bottle body processing through the following steps:

[0033] In the first step, the injection molding mechanism 3 heats and liquefies the raw material through the hot runner, and the movable table 9 is driven by the translation assembly 27 to move to the top of the injection molding mechanism 3. At this time, the movable table 9 is in the lower position, and the core 7 is inserted into the injection molding cavity 2 from top to bottom, so that the injection molding cavity 2, the core 7 and the half clamp 8 enclose a closed chamber;

[0034] In the second step, after the core body 7 is inserted into place, the limit assembly is opened. At this time, the core body 7 is accurately positioned and enclosed by the half clamp 8 and the injection cavity 2 to form a closed chamber for raw material injection. The upper convex rib 13 and the lower convex rib 14 are respectively inserted into the upper positioning groove 15 and the lower positioning groove 16, so that the half clamp 8 is closed and locked, ensuring that the closed chamber can effectively resist the extrusion force generated when the raw material is injected;

[0035] In the third step, the injection molding mechanism 3 includes a hot runner, and the liquefied raw material is injected into the closed chamber under the pushing action of the injection cylinder, and then the raw material is cooled and shaped by pouring cooling water into the injection mold and the core 7, thereby obtaining a bottle blank. At this time, the outline of the bottle blank is fixed and in a softened state, the core 7 is inserted into the bottle blank, and the blank mouth is clamped by the half clamp 8;

[0036] In the fourth step, the movable table 9 is driven by the first lifting assembly 26 to rise from the lower station to the upper station, and the half clamp 8 grabs the preform and rises synchronously with the core 7, so that the preform moves upward and completely leaves the injection cavity 2. At this time, a channel for the translation of the preform is formed between the bottom plate and the periphery of the cavity opening of the injection cavity;

[0037] Step 5: The movable table 9 at the upper station is driven by the translation assembly 27 to translate from the position above the injection molding mechanism 3 to the position above the bottle blowing mechanism 5, so that the preform is moved to the top of the bottle blowing cavity 4;

[0038] Step 6: The movable table 9 is driven by the first lifting assembly 26 to fall from the upper station to the lower station, and the half clamp 8 and the core body 7 fall simultaneously, so that the preform is inserted into the blowing cavity 4. At this time, the half clamp 8 and the core body 7 radially clamp the preform mouth and block the cavity mouth of the blowing cavity 4;

[0039] In the seventh step, the blowing hole 17 receives high-pressure air from an external high-pressure air source and inputs it into the bottle blank through the blowing groove 18. The bottle blank in a softened state expands toward the surrounding and downward directions due to the infusion of high-pressure air. In this process, the core 7 is independently extended downward by the second lifting assembly 19 (such as Figure 3 As shown), high-pressure air is delivered to the interior of the preform along the blowing groove 18, and the movable table 9 and the half clamp 8 are effectively positioned to ensure that the preform mouth is effectively sealed;

[0040] In the eighth step, the preform is blown into a bottle body, the core body 7 is lifted up by the second lifting assembly 19, the movable table 9 is moved upward by the first lifting assembly 26, and the half clamp 8 is vertically separated from the movable table by the fixed plate, so that the upper rib 13 is separated from the upper positioning groove 15, and the half clamp is opened by the dovetail;

[0041] In the ninth step, the half clamp 8 is opened and separated from the bottle mouth of the bottle body, and the movable platform 9 is driven by the first lifting component 26 to move upward to the upper station, so that the half clamp 8 and the core body 7 are separated from the bottle blowing mold. During this process, the bottle blowing mold is opened and the bottle body is moved away from the bottle blowing cavity 4.

[0042] In the tenth step, the movable table 9 is driven by the translation assembly 27 to move from the position above the bottle blowing mechanism 5 to the position above the injection molding mechanism 3 and is inserted into the injection molding cavity 2 again. The bottle blank is obtained and processed into a bottle body by repeating the first to tenth steps.

[0043] During the processing, the core 7 does not need to be pulled out of the preform, and there is no need to provide the core 7 with the space required to pull out the preform, which can effectively save the time required for the core 7 to pull out the preform. When blowing the bottle, the core is stretched downward and blown, eliminating the stretching mechanism and the stretching rod, thereby improving the processing efficiency by shortening the single processing time, and effectively reducing the overall height of the equipment and the space required for operation, which is convenient for assembly and use. The movable table is provided with two groups of cores and a second lifting assembly and a half clamp corresponding to the core, so that the two groups of cores and the half clamp can alternately obtain the preforms formed by injection molding at the injection molding mechanism and transport them to the corresponding blowing mechanism.

[0044] In actual operation, the injection mechanism 3 includes an integrally formed injection mold, on which an injection cavity 2 with a vertical axis and an upward opening is provided, and the conveying mechanism 6 includes a limiting assembly, and the core body 7 is vertically inserted into the injection cavity 2 and is positioned by the limiting assembly, so that the injection cavity 2, the half clamp 8 and the core body 7 enclose a closed chamber isolated from the external space and for raw material infusion. The injection mold forms the injection cavity 2 by integral processing, and effectively resists the extrusion force from the raw material during injection by eliminating the processing gap on the inner wall of the injection cavity 2, ensuring that the outer wall of the bottle blank is smooth and flat. The core body 7 is inserted into the injection cavity 2 from top to bottom and cooperates with the half clamp 8 to block the injection cavity 2. The core body 7 is fixed by the limiting assembly, and the half clamp 8 is fixed by the upper positioning groove 15 and the lower positioning groove 16 provided on the top and bottom surfaces thereof, so that the half clamp 8 and the core body 7 can effectively resist the extrusion force from the raw material during injection. In addition, compared with the original injection cavity that adopts a symmetrical opening and closing method, the projection area of ​​the core body 7 along the opening direction of the injection cavity 2 is much smaller than the projection area of ​​the original injection cavity along its opening and closing direction, so as to meet the requirements of setting up multiple rows of injection cavities, effectively reduce the extrusion force on the core body 7, and thus effectively reduce the requirements for the structural strength of the limiting component, which not only facilitates processing, but also improves working stability and prevents leakage of raw materials in the closed chamber.

[0045] In actual operation, the limit assembly includes a limit ring 10 sleeved on the core 7, the limit ring is fixed on the movable table, so that the limit and the movable table move together, the bottom inner edge of the limit ring 10 extends downward to form a clamping ring 11, and the outer wall of the core 7 is provided with an upwardly disposed supporting ring surface 12. After the core 7 is inserted into the injection cavity 2, the movable table 9 drives the limit ring 10 to move from top to bottom and abuts against the supporting ring surface 12 through the clamping ring 11 to limit the upward displacement of the core 7. Figure 4 As shown, when the conveying mechanism 6 is ready to cooperate with the injection molding mechanism 3 to perform the injection molding operation:

[0046] First, the half clamp 8 is switched from the open state to the closed state, so that the upper rib 13 is vertically aligned with the upper positioning groove 15;

[0047] Afterwards, the movable table 9 falls to the lower station, the core body 7 is inserted into the injection cavity 2, the limiting ring 10 can be driven by the movable table 9 to contact the supporting ring surface 12 through the clamping ring 11, the upper convex rib 13 is inserted into the upper positioning groove 15, and the lower convex rib 14 is inserted into the lower positioning groove 16, so that the core body 7 and the half clamp 8 are effectively positioned and enclosed with the injection cavity 2 to form a closed chamber;

[0048] Finally, the raw material is poured into the closed chamber and injection molded into a preform.

[0049] In actual operation, the core 7 and the injection mold are both provided with a temperature regulating tube arranged outside the closed chamber and not connected to the closed chamber. The temperature of the raw material is regulated by conveying medium water or medium oil. The temperature of the medium water or medium oil depends on the type of raw material and the processing steps. It not only ensures that the preform is cooled and shaped, and that it will not be deformed when transported to the bottle blowing cavity 4, but also ensures the softness of the preform, and ensures that the preform can be directly blown into a bottle body after being transported to the bottle blowing cavity 4, without the need for secondary heating, and effectively simplifies the structure. In addition, since the core 7 is always inserted in the bottle preform, the core 7 can also be set to a material with good heat absorption, and the heat loss of the bottle preform during the exposed transportation can be offset by storing heat in the core 7, ensuring that the bottle preform can be directly blown into a bottle body in the bottle blowing cavity 4. The core 7 can also achieve thermal compensation for the bottle preform by circulating a high-temperature medium or directly generating heat by electricity, which should also be regarded as a specific embodiment of the present invention. In addition, the core is provided with channels for the circulation of hot and cold water or heat transfer oil. By adjusting the medium flow and temperature, the preform can be processed into the bottle body to ensure the authenticity rate and save the energy consumption of secondary heating.

[0050] In actual operation, the outer wall diameter of the retaining ring 11 matches the inner wall diameter of the blank mouth of the bottle blank. After the limiting ring 10 is locked in place, the retaining ring 11 is suspended in the half clamp 8 and the raw material is poured to form the blank mouth. The outer edge diameter of the bottom surface of the retaining ring 11 matches the outer edge diameter of the supporting ring surface 12 so that the two are smoothly connected. The inner edge diameter of the bottom surface of the retaining ring 11 matches the inner edge diameter of the supporting ring surface 12 so that the inner side wall of the retaining ring 11 matches and fits the outer side wall of the core 7. The contour and size of the retaining ring 11 are limited to ensure that the retaining ring 11 can be accurately positioned in the preset retaining space enclosed by the supporting ring surface 12, the limiting ring 10 and the inner side wall of the blank mouth.

[0051] In this embodiment, the outer edge of the bottom surface of the limit ring 10 is provided with an upper convex rib 13, the periphery of the cavity opening of the injection cavity 2 is provided with a lower convex rib 14, and the top and bottom surfaces of the half clamp 8 are respectively provided with an upper positioning groove 15 and a lower positioning groove 16. When the limit ring 10 moves downward and vertically clamps the half clamp 8 with the cavity opening of the injection cavity 2, the upper convex rib 13 and the lower convex rib 14 are respectively vertically inserted into the upper positioning groove 15 and the lower positioning groove 16, so that the half clamp 8 is closed and locked. The half clamp 8 is installed at the bottom of the movable platform 9 through a liftable fixing plate 25, so that the half clamp 8 can be independently lifted and lowered relative to the movable platform 9, so that the half clamp 8 can be lifted and lowered appropriately at the bottom of the movable platform 9 to meet the plugging and unplugging needs between the upper convex rib 13 and the upper positioning groove 15. The inner wall of the clamping cavity of the half clamp 8 is provided with a thread or a concave ring pattern, so that a matching thread or a convex ring pattern is formed on the outer wall of the blank mouth of the bottle blank, which can be used to screw the bottle cap and form a fulcrum for the half clamp 8 to clamp and grasp the bottle blank. The upper positioning groove 15 and the upper convex rib 13, and the lower positioning groove 16 and the lower convex rib 14 all have the same cross-sectional profile to ensure the positioning stability after insertion. Inclined guide surfaces are provided on both sides of the upper convex rib 13 and the lower convex rib 14 to ensure that the upper convex rib 13 and the lower convex rib 14 can be smoothly inserted into the upper positioning groove 15 and the lower positioning groove 16, and the half clamp 8 is accurately positioned and cooperates with the core body 7 to block the cavity mouth of the injection cavity 2.

[0052] In this embodiment, the half clamp 8 is mounted on the bottom surface of the movable platform 9 (such as Figure 7 As shown), the half clamp 8 can be independently raised and lowered relative to the movable platform 9. The fixing plate can be raised and lowered relative to the bottom plate of the movable platform, and the half clamp and the fixing plate are fixed in vertical position, so that the half clamp can be vertically raised and lowered relative to the movable platform under the drive of the fixing plate, so that the upper positioning groove 15 and the upper convex rib 13 can be vertically plugged and pulled. The half clamp can be opened and closed freely when the upper positioning groove and the lower positioning groove are free from restraint, and can also remain closed when the upper positioning groove and the lower positioning groove are restrained, ensuring that it will not loosen or deviate during the injection molding operation, maintaining concentricity, and ensuring quality.

[0053] In actual operation, the conveying mechanism 6 includes a bottle blowing assembly corresponding to each core body, and the bottle blowing assembly includes a blowing hole 17 opened on the limit ring 10 and a blowing groove 18 (such as a blow hole 17 opened vertically on the outer wall of the core body 7) Figure 5 As shown in FIG. 1 , the core 7 moves downward and guides the high-pressure air in the blowing hole 17 into the bottle blank through the blowing groove 18, so that the bottle blank is blown into a bottle body. The blowing grooves 18 are multiple and are equidistantly arranged along the outer wall of the core 7. The inner wall of the limiting ring 10 is provided with an air delivery ring connected to the blowing hole 17, so that the high-pressure air from the blowing hole 17 can be diverted to each blowing groove 18 through the air delivery ring.

[0054] In actual operation, the blowing groove 18 is arranged on the outer side wall of the section of the core body 7 located above the supporting annular surface 12. When the second lifting assembly 19 does not drive the core body 7 to move downward, the blowing groove 18 is blocked by the limiting ring 10 during injection molding to ensure that the raw material will not leak out through the blowing groove 18. When the core body 7 moves downward under the drive of the second lifting assembly 19, the clamping ring 11 is separated from the supporting annular surface 12, so that the blowing groove 18 is exposed and the high-pressure gas is injected into the bottle blank to achieve the bottle blowing forming effect.

[0055] In actual operation, there are two bottle blowing mechanisms 5 and they are arranged on both sides of the injection molding mechanism 3. The conveying mechanism 6 includes two groups of cores corresponding to the bottle blowing mechanisms 5. The cores are installed in the movable table in a lifting manner so that the cores can move horizontally synchronously. The number of injection molding cavities 2 matches the number of bottle blowing cavities 4 in a single bottle blowing mechanism 5. The injection molding mechanism 3 continuously produces preforms and is alternately conveyed to the corresponding bottle blowing mechanism 5 by the corresponding conveying mechanism 6. The preforms produced by the injection molding mechanism 3 will be alternately conveyed to the bottle blowing mechanisms 5 on both sides, which not only provides sufficient single processing time for the bottle blowing mechanism 5 to ensure product quality, but also effectively improves the processing efficiency of the injection molding mechanism 3 and increases production. The conveying mechanism 6 includes a movable table, and the core body, the second lifting assembly and the half clamp are all installed on the same movable table to ensure that the relative positions of the core bodies are fixed and can be linked under the drive of the translation assembly 27 and the first lifting assembly 26. When in use, the axis of the blowing cavity 4 is the same as the axial distance between the injection cavity 2, and matches the distance between the core bodies on the movable table 9, so that the core body moves synchronously and accurately to the corresponding blowing cavity and injection cavity.

[0056] In actual operation, the injection mold is provided with multiple rows of injection cavities 2, each row is provided with one or more injection cavities 2, and the relative positions of the injection cavities 2 match and correspond to the relative positions of the blowing cavities 4 on each bottle blowing mechanism 5, so that the preforms formed by a single process of the injection molding mechanism 3 can be synchronously received and processed by the bottle blowing mechanism 5, effectively improving the output. Adjusting the output by adjusting the number of rows and single rows of the injection cavities 2 should be regarded as a specific embodiment of the present invention.

[0057] In actual operation, the conveying mechanism 6 includes a first lifting assembly 26 that drives the core body, the translation assembly and the second lifting assembly to rise and fall synchronously, a second lifting assembly 19 that can drive the core body 7 to stretch the preform downward in the bottle blowing cavity 4, and a translation assembly 27 (such as a lifting assembly 27) that drives the core body 7 located at the extraction station to reciprocate between the injection molding mechanism 3 and the bottle blowing mechanism 5. Figure 6As shown in the figure, the movable platform suspends the bottom of the first lifting component 26 through the translation component 27, so that the translation component 27 can be synchronously lifted and lowered with the movable platform under the drive of the first lifting component 26. The top of the first lifting component 26 is fixedly connected to the frame, and the bottom drives the injection molding motor template 24 to lift and lower, so that the translation component 27, the movable platform, the core body, the half clamp and the second lifting component can be synchronously lifted and lowered, so that the core body can be lifted and lowered and switched between the insertion station and the extraction station; the translation component 27 drives the movable platform to move horizontally relative to the injection molding motor template 24, so that the movable platform, the core body, the half clamp and the second lifting component can be synchronously translated, so that the core body can be translated and switched between the injection mechanism and the bottle blowing mechanism; the second lifting component is fixedly connected to the bottom plate, and drives the core body to lift and lower, so that the core body can be independently lifted and lowered and the bottle blowing operation can be performed.

[0058] In actual operation, the first lifting assembly 26, the second lifting assembly 19 and the translation assembly 27 can all be oil cylinders, and can also be air cylinders, screws and other driving structures, which should be regarded as specific embodiments of the present invention. In addition, the driving structure for driving the fixing plate to rise and fall can also be oil cylinders, air cylinders, screws and the like, which should also be regarded as specific embodiments of the present invention.

[0059] In actual operation, the top of the first lifting assembly 26 is fixedly connected to the frame, and the bottom drives the translation assembly 27 to rise and fall, so that the first lifting assembly 26 drives the core body to rise and fall and switch between the insertion station of the injection molding cavity 2 or the bottle blowing cavity 4 and the extraction station of the injection molding cavity 2 or the bottle blowing cavity 4 through the translation assembly 27 and the movable table in turn. The first lifting assembly 26 is set on the top of the frame, the translation assembly 27 is set below the first lifting assembly 26, the movable table is set below the translation assembly 27, and the second lifting assembly is set inside the movable table. The translation assembly 27 includes an injection molding motor template 24 fixedly connected to the first lifting assembly 26 and a driving part that drives the movable table to reciprocate along the injection molding motor template 24. The injection molding motor template 24 is provided with a track 21 for the movable table to move horizontally. The injection molding motor template 24 is provided with two horizontally arranged tracks 21. The two sides of the top plate 22 slide horizontally along the track 21 through sliders, which can effectively withstand the vertical force and drive the movable table to move horizontally.

[0060] In actual operation, the movable platform includes a top plate 22 connected to the translation assembly 27 and a bottom plate suspended below the top plate 22. The movable platform 9 is fixed below the injection molding motorized template. The bottom of the second lifting assembly 19 is set on the bottom plate, and the top is fixed to the top of the core body through the driving plate 23, so that the core body 7 can be independently lifted when the movable platform 9 is stationary. The top plate 22 and the bottom plate are fixedly connected so that the top plate 22 and the bottom plate are always matched and linked. The top plate 22 can be lifted and lowered synchronously with the injection molding motorized template 24 and relatively translated. The bottom plate can provide an installation platform for the fixed plate, the second lifting assembly, and the core body.

[0061] In actual operation, the second lifting assembly 19 is arranged on the movable platform 9, the top end of the second lifting assembly is fixedly connected to the driving plate, and the bottom end is fixedly connected to the bottom plate, so that the core body 7 can independently move vertically when the movable platform 9 is stationary. The second lifting assembly 19 drives the core body 7 to independently lift and lower based on the movable platform 9, and realizes the independent lifting and lowering of the core body 7 when the half clamp 8 stably blocks the cavity opening of the bottle blowing cavity 4.

Claims

1. An injection-blow molding machine, comprising a frame (1), on which an injection molding mechanism (3) with an injection molding cavity (2), a bottle blowing mechanism (5) with a bottle blowing cavity (4), and a conveying mechanism (6) are arranged, characterized in that: The conveying mechanism (6) comprises a core body (7) which can be axially extended and inserted into the bottle blank, and a half clamp (8) which can be opened and closed. The core body is inserted into the injection molding cavity and is injection-molded into the bottle blank. The half clamp (8) grabs the bottle blank (20) at the injection molding mechanism (3) and conveys it to the bottle blowing mechanism (5). The core body (7) inserted into the bottle blank moves synchronously with the half clamp (8) into the bottle blowing cavity (4) and blows the bottle blank into a bottle body. The conveying mechanism (6) comprises a movable table (9) and a limit assembly. The limit assembly comprises A limiting ring (10) is sleeved on the core body (7), the limiting ring (10) is fixedly connected to the movable platform (9), the inner edge of the bottom of the limiting ring (10) extends downward to form a retaining ring (11), and an outer side wall of the core body (7) is provided with an upwardly disposed supporting ring surface (12). After the core body (7) is inserted into the injection molding cavity (2), the movable platform (9) drives the limiting ring (10) to move from top to bottom and abuts against the supporting ring surface (12) through the retaining ring (11) to limit the upward displacement of the core body (7).

2. The injection-blow molding machine according to claim 1, characterized in that: The core body (7) can be installed on the movable platform (9) in a vertically liftable manner, so that the core body (7) can be moved between the injection cavity (2) and the bottle blowing cavity (4) and can be plugged in and out for switching.

3. The injection-blow molding machine according to claim 2, characterized in that: The injection molding mechanism (3) comprises an integrally formed injection mold, the injection mold is provided with an injection molding cavity (2) with a vertical axis and an upward opening, the core body (7) is vertically inserted into the injection molding cavity (2) and is clamped and positioned by a limiting component, so that the injection molding cavity (2), the half clamp (8) and the core body (7) enclose a closed chamber isolated from the external space and for the injection of raw materials.

4. The injection-blow molding machine according to claim 1, characterized in that: The outer wall diameter of the retaining ring (11) matches the inner wall diameter of the mouth of the preform. After the limiting ring (10) is locked in place, the retaining ring (11) is suspended in the half clamp (8) and the raw material is poured to form the mouth of the preform; or, the outer edge diameter of the bottom surface of the retaining ring (11) matches the outer edge diameter of the supporting ring surface (12) so that the two are smoothly connected; or, the inner edge diameter of the bottom surface of the retaining ring (11) matches the inner edge diameter of the supporting ring surface (12) so that the inner wall of the retaining ring (11) matches and fits with the outer wall of the core body (7).

5. The injection-blow molding machine according to claim 1, characterized in that: The outer edge of the bottom surface of the limiting ring (10) is provided with an upper convex rib (13), the periphery of the cavity opening of the injection cavity (2) is provided with a lower convex rib (14), and the top surface and bottom surface of the half clamp (8) are respectively provided with an upper positioning groove (15) and a lower positioning groove (16). When the limiting ring (10) moves downward and vertically clamps the half clamp (8) with the cavity opening of the injection cavity (2), the upper convex rib (13) and the lower convex rib (14) are respectively vertically inserted into the upper positioning groove (15) and the lower positioning groove (16), so that the half clamp (8) is closed and locked; Alternatively, the conveying mechanism (6) includes a bottle blowing assembly, which includes a blowing hole (17) formed on a limiting ring (10) and a blowing groove (18) formed vertically on an outer wall of the core body (7); the core body (7) moves downward and guides high-pressure air in the blowing hole (17) into the bottle blank through the blowing groove (18), so that the bottle blank is blown into a bottle body; or, the half clamp (8) is mounted on the bottom surface of the movable platform (9) through a liftable fixing plate (25), so that the half clamp (8) can be independently lifted and lowered relative to the movable platform (9).

6. The injection-blow molding machine according to claim 3, characterized in that: The bottle blowing mechanisms (5) are two and are disposed on both sides of the injection molding mechanism (3). The conveying mechanism (6) comprises two groups of cores corresponding to the bottle blowing mechanisms (5) one by one. The cores are installed in the movable platform in a liftable manner so that the cores can move synchronously horizontally.

7. The injection-blow molding machine according to claim 3, characterized in that: The number of the injection cavities (2) matches the number of the blowing cavities (4) in a single blowing mechanism (5), and the injection mechanism (3) continuously produces bottle blanks which are alternately transported to the corresponding blowing mechanism (5); or, the injection mold is provided with a plurality of rows of injection cavities (2), and the relative positions of the injection cavities (2) match and correspond to the relative positions of the blowing cavities (4) on each blowing mechanism (5).

8. The injection-blow molding machine according to any one of claims 3 to 7, characterized in that: The conveying mechanism (6) comprises a first lifting component (26) for driving the core body and the movable platform (9) to rise and fall synchronously, a second lifting component (19) for driving the core body (7) to stretch the preform downward in the bottle blowing cavity (4), and a translation component (27) for driving the core body (7) located at the extraction station to move back and forth between the injection molding mechanism (3) and the bottle blowing mechanism (5). The movable platform is suspended at the bottom of the first lifting component (26) by the translation component (27), so that the translation component (27) is raised and lowered synchronously with the movable platform under the drive of the first lifting component (26).

9. The injection-blow molding machine according to claim 8, characterized in that: The first lifting assembly (26) is fixedly connected to the frame at the top and drives the translation assembly (27) to rise and fall at the bottom, so that the first lifting assembly (26) drives the core (7) to rise and fall between the insertion station of the injection molding cavity (2) or the bottle blowing cavity (4) and the extraction station of the injection molding cavity (2) or the bottle blowing cavity (4) through the translation assembly (27) and the movable table in sequence; or, the translation assembly (27) includes an injection molding movable template (24) fixedly connected to the first lifting assembly (26) and a movable table. and a driving unit for driving the movable platform to reciprocate and translate along the injection molding motorized template (24), wherein the injection molding motorized template (24) is provided with a track (21) for the movable platform to translate; or, the movable platform comprises a top plate (22) connected to the translation component (27) and a bottom plate suspended below the top plate (22), the bottom of the second lifting component (19) is arranged on the bottom plate, and the top is fixedly connected to the top of the core body through a driving plate, so that the core body (7) can be independently lifted and lowered when the movable platform (9) is stationary.

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