Mold core translation type injection blow molding device
By designing the core flat -migraphic injection molding device in the injection molding device, the vertical layout of the core core is to solve the problem of uneven wall thickness due to gravity bending during the molding process. Improve quality.
Patent Information
- Application Number
- CN202420706796.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-04-08
AI Technical Summary
When blowing the plastic bottle with a small mouth and a long bottle body, the bottle preform bends downward due to its own gravity, resulting in uneven wall thickness of the plastic bottle after forming, affecting the quality of the finished product.
Design a core translation type injection blow molding device. By setting equally spaced injection molding half cavities and blow molding half cavities on the fixed mold base, and setting corresponding half cavities on the movable mold base, combined with the movement of the core The bracket and core seat ensure that the core is arranged vertically to avoid bending of the preform.
It realizes that the bottle preform is not affected by gravity during the molding process, ensures the uniformity of the wall thickness of the plastic bottle, improves the quality of the finished product, and at the same time simplifies the device structure and reduces the cost.
Smart Images
Figure CN222387588U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an injection-blow molding device, in particular to a core translation type injection-blow molding device. Background Art
[0002] At present, the injection-blowing process of plastic bottles usually adopts the horizontal three-station injection-blowing process. However, when injecting and blowing small-mouth long-bodied plastic bottles, since the preforms are relatively thick, the preforms bend downward under the action of their own gravity during horizontal blow molding of the core, resulting in uneven wall thickness of the molded plastic bottles, which seriously affects the quality of the finished plastic bottles. Utility Model Content
[0003] The technical problem to be solved by the present invention is to provide a core translation type injection blow molding device in which a bottle blank will not bend downward.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a core translation type injection blow molding device, comprising: a fixed mold base, and a movable mold base that performs translational movement relative to the fixed mold base, wherein the fixed mold base is provided with N injection molding half cavities and N+1 blow molding half cavities arranged at intervals, that is, the intervals between adjacent injection molding half cavities and blow molding half cavities are the same, and the injection molding half cavities and the blow molding half cavities are arranged at intervals; correspondingly, the movable mold base is provided with an injection molding half cavity corresponding to the injection molding half cavity on the fixed mold base one by one, and a blow molding half cavity corresponding to the blow molding half cavity on the fixed mold base one by one, and the injection molding half cavity on the fixed mold base and the movable mold base are arranged at intervals. When the corresponding injection molding half-cavities on the mold base are closed, a complete injection mold cavity is formed. When the blow molding half-cavity on the fixed mold base and the corresponding blow molding half-cavity on the movable mold base are closed, a complete blow molding cavity is formed. The fixed mold base or the movable mold base is provided with a core moving bracket which can perform translational movement along the opening and closing direction perpendicular to the injection mold cavity and the blow molding cavity. The core moving bracket is movably provided with a core seat which can move along the opening and closing direction of the injection mold cavity and the blow molding cavity. 2N vertically arranged injection and blow cores are evenly spaced on the core seat. The spacing between adjacent injection and blow cores is equal to the spacing between adjacent injection molding half-cavities and blow molding half-cavities. A blow molding mechanism is provided in the injection and blow core.
[0005] As a preferred embodiment, in the core translation type injection blow molding device, the core moving bracket includes: a slider slidably arranged on a static mold seat or a movable mold seat, the slider is provided with at least one pair of guide support rods parallel to the opening and closing directions of the injection mold cavity and the blow mold cavity, and the core seat is slidably arranged on the guide support rods.
[0006] As a preferred scheme, in the core translation type injection blow molding device, the specific setting method of the slider is: a T-shaped slide groove is opened on the static mold base or the dynamic mold base, and a T-shaped sliding boss matching the T-shaped slide groove is arranged at the bottom of the slider, and the T-shaped sliding boss is slidably arranged in the T-shaped slide groove on the static mold base or the dynamic mold base.
[0007] As a preferred embodiment, in the core translation type injection blow molding device, the specific arrangement of the guide support rod is as follows: the slider is provided with a guide support rod mounting hole corresponding to the guide support rod on its corresponding side, the slider is provided with a locking mounting hole communicating with the guide support rod mounting hole on its other side, and the corresponding end of the guide support rod is provided with a locking threaded hole corresponding to the locking mounting hole, and a locking screw is selected to pass through the locking mounting hole on the slider and tightened in the locking threaded hole on the corresponding end of the guide support rod.
[0008] As a preferred solution, in the core translation type injection blow molding device, the locking mounting hole is a stepped hole with a small inner section and a large outer section, and the cap of the locking screw is buried in the outer section of the locking mounting hole.
[0009] The beneficial effects of the utility model are:
[0010] 1. The utility model sets the core into a vertical arrangement structure so that the preform formed by injection molding will not bend due to its own gravity, so that the wall thickness of the blow-molded plastic bottle is uniform, thereby ensuring the quality of the finished plastic bottle.
[0011] 2. The utility model provides a row of injection molding half-cavities and blow molding half-cavities arranged at equal intervals on the fixed mold base, and provides corresponding injection molding half-cavities and blow molding half-cavities on the movable mold base. It is only necessary to provide a core moving bracket on the fixed mold base or the movable mold base, and to provide a corresponding core on the core moving bracket, without having to provide a core moving bracket on both the fixed mold base and the movable mold base, and to provide a core on the core moving bracket. This makes the structure of the entire injection blow molding device very simple and reduces the cost.
[0012] 3. The arrangement of the guide support rod of the utility model is relatively simple, which greatly facilitates the installation and future maintenance of the guide support rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the arrangement structure of the injection blow molding device of the utility model.
[0014] Figure 2 It is a structural schematic diagram of the injection blow molding device of the utility model when the blow molding cavity is opened.
[0015] Figure 3It is a structural schematic diagram of the injection blow molding device of the utility model when the injection cavity is opened.
[0016] Figure 4 It is a schematic diagram of the structure of the injection blow molding device described in the utility model from a top view.
[0017] Figures 1 to 4 The reference numerals in the drawings are: 1, fixed mold base plate, 2, fixed mold mounting plate, 21, injection molding half cavity, 22, blow molding half cavity, 3, movable mold base plate, 4, movable mold mounting plate, 41, injection molding half cavity, 42, blow molding half cavity, 50, slider, 500, T-shaped sliding boss, 51, guide support rod, 52, locking screw, 6, injection core, 60, core seat, 7, injection runner, 71, feed nozzle, 9, plastic bottle, 90, bottle blank. DETAILED DESCRIPTION
[0018] The specific implementation scheme of a core translation type injection blow molding device according to the utility model is described in detail below in conjunction with the accompanying drawings.
[0019] like Figures 1 to 4As shown, the utility model is a core translation type injection blow molding device, comprising: a fixed mold base and a movable mold base that performs translational motion relative to the fixed mold base, the fixed mold base comprising: a fixed mold base plate 1 and a fixed mold mounting plate 2 arranged on the fixed mold base plate 1, the movable mold base comprising: a movable mold base plate 3 and a movable mold mounting plate 4 arranged on the movable mold base plate 3, the fixed mold mounting plate 2 is provided with two injection molding half cavities 21 and three blow molding half cavities 22 arranged at intervals, that is, adjacent injection molding half cavities 21 are arranged at intervals, and the injection molding half cavities 22 are arranged at intervals. The spacing between the cavity 21 and the blow molding half cavity 22 is the same, and the injection molding half cavity 21 and the blow molding half cavity 22 are arranged one by one; correspondingly, the movable mold mounting plate 4 is provided with an injection molding half cavity 41 corresponding to the injection molding half cavity 21 on the fixed mold mounting plate 2, and a blow molding half cavity 42 corresponding to the blow molding half cavity 22 on the fixed mold mounting plate 2. When the injection molding half cavity 21 on the fixed mold mounting plate 2 and the corresponding injection molding half cavity 41 on the movable mold mounting plate 4 are closed, a The complete injection mold cavity, the blow molding half cavity 22 on the fixed mold mounting plate 2 and the corresponding blow molding half cavity 42 on the movable mold mounting plate 4 are closed to form a complete blow molding mold cavity, thereby forming three blow molding stations I, III and V, and two injection molding stations II and IV; the movable mold bottom plate 3 is provided with a core moving bracket that can move in a translational direction perpendicular to the opening and closing direction of the injection mold cavity and the blow molding mold cavity, and the core moving bracket includes: a slider 50 slidably arranged on the movable mold seat, and the specific structure of the slider 50 The arrangement is as follows: a T-shaped slide groove is provided on the movable mold seat, a T-shaped sliding boss 500 matching the T-shaped slide groove is provided at the bottom of the slider 50, and the T-shaped sliding boss 500 is slidably arranged in the T-shaped slide groove on the movable mold seat (it belongs to the conventional technology in this field and will not be described in detail here); a pair of guide support rods 51 arranged along the opening and closing direction of the injection mold cavity and the blow mold cavity are provided on the slider 50, and the specific arrangement of the guide support rods 51 is as follows: the slider 50 is provided on its corresponding side ( Figure 2 and Figure 3 A guide support rod mounting hole corresponding to the guide support rod 51 is provided, and the slider 50 is provided on the other side ( Figure 2 and Figure 3 The left side of the guide support rod 51 is provided with a locking mounting hole communicating with the guide support rod mounting hole. The corresponding end of the guide support rod 51 ( Figure 2 and Figure 3A locking threaded hole corresponding to the locking mounting hole is provided on the end surface of the slider 50, and a locking screw 52 is selected to pass through the locking mounting hole on the slider 50 and tightened in the locking threaded hole on the corresponding end of the guide support rod 51 (it belongs to the conventional technology in this field and will not be described in detail here); a core seat 60 is slidably arranged on the guide support rod 51, and an injection-blowing core 6 is arranged on the core seat 60 (it belongs to the conventional technology in this field and will not be described in detail here); four vertically arranged injection-blowing cores 6 are evenly spaced on the core seat 60, and the spacing between adjacent injection-blowing cores 6 is equal to the spacing between adjacent injection-molding half-cavities 21 and blow-molding half-cavities 22, and a blow-molding mechanism is arranged in the injection-blowing core 6 (it belongs to the conventional technology in this field and will not be described in detail here); a hot runner 7 is also arranged in the fixed mold base plate 1, and the hot runner 7 is connected to the injection port of the corresponding injection mold cavity 21 through a feed nozzle 71 (it belongs to the conventional technology in this field and will not be described in detail here).
[0020] In actual application, the locking installation hole is a stepped hole with a small inner section and a large outer section, and the cap of the locking screw 52 is buried in the outer section of the locking installation hole.
[0021] In actual use, the mold is closed, the injection mold cavity and the injection blow core 6 form an injection bottle preform mold, the molten plastic is injected into the injection mold cavity through the hot runner 7 and the feed nozzle 71, and after a certain period of time, the bottle preform 90 maintained at an appropriate temperature is formed and then the mold is opened, the movable mold seat retreats a certain distance, and the core seat 60 slides forward a certain distance on the guide support rod 51, and then the slider 50 moves between the injection molding station and the blow molding station, and the injection blow core 6 with the bottle preform 90 is moved to the corresponding blow molding station, and the injection blow core 6 without the bottle preform 90 is moved to the injection molding station, and then the mold is closed, the injection mold cavity and the injection blow core 6 form an injection bottle preform mold again, and the blow molding cavity and the injection blow core 6 with the bottle preform 90 form a blow molding mold, and the molten plastic is heated and cooled. The flow channel 7 and the feed nozzle 71 are injected into the injection mold cavity, and after a certain period of time, a bottle blank 90 is formed to maintain a suitable temperature. At the same time, compressed air is blown into the bottle blank 90 from the air inlet through the air channel, and cooled and formed to form a plastic bottle 9. After the injection and blow molding actions are completed, the mold is opened, the movable mold seat retreats a certain distance, and the core seat 60 slides forward a certain distance on the guide support rod 51 with the injection and blow core 6, and then the slider 50 moves between the injection molding station and the blow molding station, and the injection and blow core 6 with the bottle blank 90 is moved to the corresponding blow molding station, and the injection and blow core 6 with the plastic bottle 9 is moved to the injection molding station. The molded plastic bottle 9 is removed from the corresponding injection and blow core 6, and then the mold is closed again for the next injection and blow molding, and this cycle is repeated.
[0022] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes and modifications made to the shape, structure, characteristics and spirit described in the scope of the claims of the present invention should be included in the scope of the claims of the present invention.
Claims
1. A core translation type injection blow molding device, comprising: The fixed mold base and the movable mold base which performs translational motion relative to the fixed mold base are characterized in that the fixed mold base is provided with N injection molding half cavities and N+1 blow molding half cavities arranged at intervals, that is, the intervals between adjacent injection molding half cavities and blow molding half cavities are the same, and the injection molding half cavities and the blow molding half cavities are arranged at intervals; correspondingly, the movable mold base is provided with injection molding half cavities corresponding to the injection molding half cavities on the fixed mold base one by one, and blow molding half cavities corresponding to the blow molding half cavities on the fixed mold base one by one, and the injection molding half cavities on the fixed mold base and the corresponding injection molding half cavities on the movable mold base form an injection molding half cavity when they are closed. A complete injection mold cavity is formed when the blow molding half cavity on the fixed mold seat and the corresponding blow molding half cavity on the movable mold seat are closed. The fixed mold seat or the movable mold seat is provided with a core moving bracket which can perform translational movement along the opening and closing direction perpendicular to the injection mold cavity and the blow molding cavity. The core moving bracket is movably provided with a core seat which can move along the opening and closing direction of the injection mold cavity and the blow molding cavity. 2N vertically arranged injection and blow cores are evenly spaced on the core seat. The spacing between adjacent injection and blow cores is equal to the spacing between adjacent injection molding half cavities and blow molding half cavities. A blow molding mechanism is provided in the injection and blow core.
2. A core translation type injection blow molding device according to claim 1, characterized in that: The core moving bracket includes: a slider slidably arranged on a static mold seat or a movable mold seat, the slider is provided with at least one pair of guide support rods parallel to the opening and closing directions of the injection mold cavity and the blow mold cavity, and the core seat is slidably arranged on the guide support rods.
3. A core translation type injection blow molding device according to claim 2, characterized in that: The specific setting method of the slider is: a T-shaped slide groove is opened on the static mold base or the dynamic mold base, and a T-shaped sliding boss matching the T-shaped slide groove is set at the bottom of the slider, and the T-shaped sliding boss is slidably set in the T-shaped slide groove on the static mold base or the dynamic mold base.
4. A core translation type injection blow molding device according to claim 2, characterized in that: The specific setting method of the guide support rod is: the slider is provided with a guide support rod mounting hole corresponding to the guide support rod on its corresponding side, the slider is provided with a locking mounting hole connected to the guide support rod mounting hole on the other side, and the corresponding end of the guide support rod is provided with a locking threaded hole corresponding to the locking mounting hole, and a locking screw is selected to pass through the locking mounting hole on the slider and tightened in the locking threaded hole on the corresponding end of the guide support rod.
5. A core translation type injection blow molding device according to claim 4, characterized in that: The locking installation hole is a stepped hole with a small inner section and a large outer section, and the cap of the locking screw is buried in the outer section of the locking installation hole.