Lamination mold

Abstract

The utility model relates to the technical field of injection molding, and discloses a lamination mold which comprises a fixed mold mechanism, two movable mold assemblies and a supporting assembly, and the two movable mold assemblies are oppositely arranged on the two sides of the fixed mold mechanism; a transmission assembly is arranged on the outer side of the fixed mold mechanism, and a guide assembly is arranged on one side of the transmission assembly; the transmission assembly comprises a gear and two racks meshed with the gear, the gear is rotationally installed on the fixed mold mechanism through a fixing plate, one end of each rack is connected with the movable mold assembly, and the two racks are oppositely meshed with the upper side and the lower side of the gear; the fixed mold mechanism is installed on the injection molding machine in a sliding mode through the supporting assembly and supported by the supporting assembly, the moving directions of the upper rack and the lower rack are synchronous and opposite when the gear rotates, it can be guaranteed that the two movable mold assemblies can be accurately and synchronously opened and closed relative to the fixed mold mechanism, and then the guide assembly is used for guiding movement of the movable mold assemblies; and stable operation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to a laminated mold. Background Art

[0002] The stack mold is a new type of injection mold that is efficient, fast and energy-saving. It is most suitable for molding large flat parts, shallow cavity shell parts, small multi-cavity thin-walled parts and parts that need to be produced in large quantities. Unlike conventional molds, the stack mold is a mold in which multiple cavities are overlapped in the mold closing direction. This mold usually has multiple parting surfaces, and each parting surface can be arranged with one or more cavities. Compared with conventional molds, the output of the stack mold can be increased by 90% to 95%, which greatly improves equipment utilization and productivity and reduces costs.

[0003] The stacked mold structure is composed of multiple special systems such as the hot runner system, mold frame system, load-bearing guide system, two-way ejection system, and mold opening and closing linkage system. It has a complex structure and high requirements for processing and assembly technology. In order to make the plastic parts shrink uniformly, the residence time of the plastic parts in each cavity is equivalent, and it is crucial to ensure that the parting surfaces of each layer of cavity are opened at the same time.

[0004] The stacking mold is equipped with special components on the dedicated injection molding machine, such as the linkage crank arm used to support the fixed mold part of the stacking mold, but the price of the dedicated injection molding machine is high, which will lead to increased production costs. Therefore, manufacturers generally choose to install the stacking mold on an ordinary injection molding machine to achieve the purpose of reducing costs and increasing efficiency.

[0005] In order to realize smooth opening of the stack mold on a common injection molding machine, the opening mechanism of the existing stack mold is usually more complex in structure, and there is still room for improvement in the precise control of the opening distance. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a laminated mold, which provides support for a fixed mold mechanism on an injection molding machine through a support assembly, and then through the engagement between a gear and two racks, enables two movable mold assemblies to open and close accurately and synchronously relative to the fixed mold mechanism, and utilizes a guide assembly to provide guidance for the movement of the movable mold assembly to ensure its stable operation.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A stacking mold, comprising a fixed mold mechanism, a movable mold assembly and a supporting assembly for supporting the fixed mold mechanism, wherein the supporting assembly is arranged at the bottom of the fixed mold mechanism and is slidably connected to an injection molding machine, and two movable mold assemblies are arranged on both sides of the fixed mold mechanism opposite to each other;

[0009] A transmission assembly capable of synchronously opening and closing the two movable mold assemblies is disposed on the outer side of the fixed mold mechanism, and a guide assembly for guiding the movable mold assembly to move is disposed on one side of the transmission assembly;

[0010] The transmission assembly includes a gear and two racks meshing with the gear. The gear is rotatably mounted on the fixed mold mechanism through a fixed plate. One end of the rack is connected to the movable mold assembly, and the two racks are relatively meshed at the upper and lower sides of the gear.

[0011] Optionally, the guide assembly includes a slide and a guide rod, the two slides are fixedly mounted on the two movable mold assemblies respectively, the guide rod is fixedly mounted on the fixed mold mechanism through a support, and both ends of the guide rod slide through the two slides respectively.

[0012] Optionally, the axis of the guide rod is parallel to the moving direction of the movable mold assembly, and a bushing is provided between the slide seat and the guide rod.

[0013] Optionally, two transmission assemblies and two guide assemblies are each provided, and the two transmission assemblies and the two guide assemblies are respectively distributed on the mold at diagonal angles.

[0014] Optionally, the fixed mold mechanism includes two fixed mold assemblies arranged back to back, and a guiding positioning assembly and a supporting alignment assembly are further arranged between the fixed mold assembly and the movable mold assembly.

[0015] Optionally, the fixed mold assembly includes a hot runner plate, a fixed mold plate and a bottom plate arranged in sequence from the inside to the outside, and the movable mold assembly includes a movable mold plate, a center connecting plate and a push plate arranged in sequence from the outside to the inside, and the bottom plate is in contact with the push plate in the mold closing state.

[0016] Optionally, the support alignment assembly includes an insert plate and a slot that can cooperate with each other, the slot is opened on the outside of the base plate, one end of the insert plate is fixedly mounted on the movable template, and the other end passes over the center link plate and the push plate and can be inserted into the slot.

[0017] Optionally, the guiding and positioning assembly includes a positioning hole and a guide column for supporting the push plate, the positioning hole is opened on the base plate, one end of the guide column is fixedly connected to the movable template, and the other end passes through the center link plate and the push plate and can be embedded in the positioning hole.

[0018] Optionally, the push plate is slidably connected to the guide column via a guide sleeve, and a driving assembly for pushing the push plate away from the center link plate is installed on the movable mold assembly.

[0019] Optionally, the driving assembly includes a telescopic assembly fixedly mounted on the movable template, an output end of the telescopic assembly is connected to a push rod through the center connecting plate, and the push rod is fixedly mounted on the push plate.

[0020] Beneficial Effects

[0021] (1) The fixed mold mechanism in the utility model is slidably mounted on the injection molding machine through a support assembly and supported by the support assembly. When the gear rotates, the running directions of the upper and lower racks are synchronized and opposite, which can ensure that the two movable mold assemblies can open and close accurately and synchronously relative to the fixed mold mechanism. The guide assembly is then used to provide guidance for the movement of the movable mold assembly to ensure its stable operation. The mold opening structure of the mold is simpler than that of the prior art, and the mold opening distance can be precisely controlled through the meshing relationship of the gear rack.

[0022] (2) The transmission assembly and guide assembly in the present invention are used in pairs, and each pair of assemblies is distributed on the diagonal lines of the mold. This structure can ensure that the upper and lower forces of the mold are balanced, avoid structural torsion, and make the mold more stable during the opening and closing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the laminated mold of an embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the side structure of the stacking mold of an embodiment of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the support assembly in the embodiment of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the guide assembly in the embodiment of the utility model;

[0027] Figure 5 It is a schematic diagram of the internal structure of the laminated mold of an embodiment of the utility model;

[0028] Among them, 1. transmission assembly; 11. fixed plate; 12. gear; 13. rack; 2. guide assembly; 21. support; 22. slide; 23. guide rod; 24. bushing; 3. support assembly; 4. fixed mold assembly; 41. hot runner plate; 42. fixed mold plate; 43. bottom plate; 5. movable mold assembly; 51. movable mold plate; 52. center connecting plate; 53. push plate; 6. drive assembly; 61. telescopic assembly; 62. push rod; 71. guide column; 72. positioning hole; 73. guide sleeve; 81. plug plate; 82. slot; 9. hot runner system. DETAILED DESCRIPTION

[0029] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0030] Embodiment 1

[0031] like Figure 1-Figure 5 As shown, a stacked mold includes a fixed mold mechanism, a movable mold mechanism and a hot runner system 9 arranged inside the fixed mold mechanism, the fixed mold mechanism includes two fixed mold components 4 arranged back to back, the two fixed mold components 4 are fixedly connected, and the hot runner system 9 is arranged between the two fixed mold components 4; the movable mold mechanism includes two relatively arranged movable mold components 5, the two movable mold components 5 are respectively arranged on both sides of the fixed mold mechanism, after the movable mold component 5 and the relative fixed mold component 4 are molded, a cavity for injection is formed between the two; the two movable mold components 5 can realize synchronous opening and closing of the mold relative to the fixed mold component 4 through the transmission component 1, and a guide component 2 is also arranged on one side of the transmission component 1, and the guide component 2 can provide guidance for the movement of the movable mold component 5 to ensure the accuracy of the mold closing.

[0032] The movable mold side and the fixed mold side of the ordinary mold are fixedly installed by the corresponding mounting plates on the injection molding machine. The fixed mold of the stacked mold is located in the middle, and the movable mold is located on both sides of the fixed mold. The middle fixed mold is supported by hangers and special components on the special injection molding machine to ensure its precise and stable mold closing; on the ordinary injection molding machine, the movable mold assemblies 5 on both sides are respectively connected to the mounting plates, and the fixed mold mechanism in the middle is slidably installed on the injection molding machine through the support assembly 3. The support assembly 3 adopts a support plate, which is fixedly installed at the middle position of the bottom of the fixed mold mechanism by screws, and the bottoms of both ends are slidably connected to the slide rails on the injection molding machine through sliders.

[0033] As mentioned above, the transmission assembly 1 and the guide assembly 2 are both arranged on the outside of the mold, the former is used to ensure that the two movable mold assemblies 5 can achieve synchronous opening and closing of the mold relative to the fixed mold mechanism, and the latter is used to ensure that the movable mold assembly 5 can be accurately guided during the process of opening and closing the mold.

[0034] The transmission assembly 1 includes a gear 12 and two racks 13. The gear 12 and the rack 13 can mesh with each other, and the two racks 13 are distributed on the upper and lower sides of the gear 12; the gear 12 is rotatably mounted on the fixed mold mechanism through the fixed plate 11, and one end of the rack 13 is fixedly connected to the corresponding movable mold assembly 5.

[0035] When opening and closing the mold, one of the racks 13 moves horizontally to drive the gear 12 to rotate, and when the gear 12 rotates, it drives the other rack 13 to move horizontally. Since the two racks 13 are distributed on the upper and lower sides of the gear 12, the movement directions of the two racks 13 are opposite, thereby realizing the synchronous opening and closing of the two movable mold assemblies 5 relative to the fixed mold mechanism; and since the meshing accuracy of the gear 12 and the rack 13 is high, the mold opening distance can be precisely controlled through their meshing relationship.

[0036] The guide assembly 2 includes a slide 22 and a guide rod 23. The two slides 22 are fixedly mounted on the two movable mold assemblies 5 respectively. The guide rod 23 is fixedly mounted on the fixed mold mechanism through a support 21, and both ends of the guide rod 23 slide through the two slides 22 respectively; the axis of the guide rod 23 is parallel to the moving direction of the movable mold assembly 5, and a bushing 24 is arranged between the slide 22 and the guide rod 23.

[0037] During the process of opening and closing the mold, both ends of the guide rod 23 slide in the inner hole of the slide seat 22, and the bushing 24 is fixedly installed in the inner hole, and the bushing 24 is made of copper and has good lubrication performance. Based on this, the movable mold assembly 5 is limited by the axial direction of the guide rod 23, and its movement direction can only be carried out in a specified direction.

[0038] Furthermore, two transmission components 1 and two guide components 2 are provided, and the two transmission components 1 and the two guide components 2 are respectively distributed diagonally on the mold. The transmission components 1 and the guide components 2 are used in pairs, and each pair of components is distributed on the diagonal line of the mold. This structure can ensure that the upper and lower forces of the mold are balanced, avoid structural torsion, and make the mold run more stably during the opening and closing process.

[0039] The transmission assembly 1, the guide assembly 2 and the support assembly 3 are all arranged on the outside of the stacking mold. When the mold is used on a dedicated injection molding machine for the stacking mold, it is only necessary to remove the transmission assembly 1, the guide assembly 2 and the support assembly 3, and install corresponding hangers on both sides of the fixed mold mechanism; in summary, the mold can be used not only on ordinary injection molding machines, but also on dedicated injection molding machines. It is only necessary to replace the corresponding components, and since the transmission assembly 1, the guide assembly 2 and the support assembly 3 are all on the outside of the mold, its disassembly and assembly is also more convenient.

[0040] Embodiment 2

[0041] like Figure 1-Figure 5 As shown, based on the first embodiment, the utility model further proposes a guide positioning component and a support alignment component, both of which are arranged between the fixed mold component 4 and the movable mold component 5.

[0042] The fixed mold assembly 4 includes a hot runner plate 41, a fixed mold plate 42 and a bottom plate 43 arranged in sequence from the inside to the outside, and the movable mold assembly 5 includes a movable mold plate 51, a center plate 52 and a push plate 53 arranged in sequence from the outside to the inside, and the bottom plate 43 is in contact with the push plate 53 in the mold closing state. The rack 13 and the slide 22 are fixedly mounted on the movable mold plate 51 and the center plate 52, the fixed plate 11 and the support 21 are fixedly mounted on the fixed mold mechanism, and the two ends of the fixed plate 11 are fixedly connected to the two fixed mold plates 42 respectively, and the support 21 is fixedly connected to the two hot runner plates 41 and the fixed mold plate 42.

[0043] As mentioned above, the support alignment component includes an insert plate 81 and a slot 82 that can cooperate with each other. The slot 82 is opened on the outer side of the bottom plate 43. One end of the insert plate 81 is fixedly installed on the movable template 51, and the other end passes over the center connecting plate 52 and the push plate 53 and can be inserted into the slot 82 to ensure that the mold can be successfully closed and its position is accurate.

[0044] One end of the insert plate 81 is fixedly connected to the side of the movable plate 51 , the slot 82 is opened on the outside of the bottom plate 43 , and the support alignment components are used in pairs, and the two support alignment components are symmetrically distributed on both sides of the mold.

[0045] After the mold is closed, the insert plate 81 is inserted into the slot 82. Wear-resistant blocks are installed on the upper and lower sides of the slot 82 to prevent excessive wear of the mold. After the insert plate 81 is inserted into the slot 82, the insert plate 81 can also generate a certain supporting force for the movable mold assembly 5, thereby avoiding deviation between the movable mold mechanism and the fixed mold mechanism due to the influence of gravity.

[0046] As mentioned above, the guide positioning assembly includes a positioning hole 72 and a guide column 71. The guide column 71 is used to support the push plate 53 to facilitate its separation relative to the center link plate 52. The positioning hole 72 is opened on the bottom plate 43, and one end of the guide column 71 is fixedly connected to the movable template 51, and the other end passes through the center link plate 52 and the push plate 53 and can be embedded in the positioning hole 72.

[0047] The middle connecting plate 52 and the push plate 53 are provided with clearance holes at positions corresponding to the guide posts 71, and guide sleeves 73 are installed in the clearance holes. The push plate 53 is slidably connected to the guide posts 71 through the guide sleeves 73; when the push plate 53 moves away from the middle connecting plate 52 along the guide posts 71, the injection molded product can be pushed away from the mold; after the mold is closed, the end of the guide post 71 opposite to the movable mold plate 51 is embedded in the positioning hole 72; therefore, this structure can not only provide support for the movement of the push plate 53, but also has a positioning function, thereby ensuring the accuracy of the mold closing.

[0048] Furthermore, in order to facilitate the movement of the push plate 53 , a driving assembly 6 for pushing the push plate 53 away from the middle connecting plate 52 is installed on the movable mold assembly 5 .

[0049] The driving assembly 6 includes a telescopic assembly 61 fixedly mounted on the movable platen 51, and the output end of the telescopic assembly 61 is connected to a push rod 62 through the middle link plate 52, and the push rod 62 is fixedly mounted on the push plate 53. When the telescopic assembly 61 is extended, the push plate 53 moves away from the middle link plate 52 to push the product away from the mold, and when the telescopic assembly 61 is retracted, the push plate 53 moves toward the middle link plate 52 along the guide column 71.

[0050] The telescopic component 61 preferably adopts an ejection cylinder, and the push rod 62 installed at its output end is connected to the push plate 53 by a card connection, that is, an I-shaped card slot is opened on the side of the push plate 53, and the outer contour of the push rod 62 is adapted to the card slot, which facilitates the disassembly and assembly of the structure.

[0051] In order to play a better role, four guide positioning components and drive components 6 are provided on each movable mold component 5 and are distributed at the four corners.

[0052] In addition, the hot runner system 9 includes a hot runner assembly disposed in the hot runner plate 41, the hot runner is connected to the outside through a nozzle assembly, the nozzle assembly is fixed to the hot runner top plate, the hot runner top plate is disposed between the push plate 53 and the movable plate 51, and a receiving hole is provided on the movable plate 51 corresponding to the installation position of the nozzle assembly. The molten rubber enters the fixed mold mechanism through the nozzle assembly, and simultaneously moves to the fixed mold assemblies 4 on both sides until entering the cavity to complete the injection molding.

[0053] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0055] The above is based on the ideal embodiment of the utility model. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A laminated mold, characterized in that: It comprises a fixed mold mechanism, a movable mold assembly (5) and a support assembly (3) for supporting the fixed mold mechanism, wherein the support assembly (3) is arranged at the bottom of the fixed mold mechanism and is slidably connected to the injection molding machine, and two movable mold assemblies (5) are arranged oppositely on both sides of the fixed mold mechanism; A transmission assembly (1) capable of causing the two movable mold assemblies (5) to open and close synchronously is arranged on the outer side of the fixed mold mechanism, and a guide assembly (2) for guiding the movable mold assembly (5) to move is arranged on one side of the transmission assembly (1); The transmission assembly (1) comprises a gear (12) and two racks (13) meshing with the gear (12); the gear (12) is rotatably mounted on the fixed mold mechanism via a fixed plate (11); one end of the rack (13) is connected to the movable mold assembly (5), and the two racks (13) are relatively meshed with the upper and lower sides of the gear (12).

2. The stacking mold according to claim 1, characterized in that: The guide assembly (2) comprises a slide seat (22) and a guide rod (23), the two slide seats (22) being fixedly mounted on the two movable mold assemblies (5) respectively, the guide rod (23) being fixedly mounted on the fixed mold mechanism via a support (21), and the two ends of the guide rod (23) respectively slidingly pass through the two slide seats (22).

3. The stacking mold according to claim 2, characterized in that: The axis of the guide rod (23) is parallel to the moving direction of the movable mold assembly (5), and a bushing (24) is provided between the slide seat (22) and the guide rod (23).

4. The stacking mold according to claim 3, characterized in that: Two of each of the transmission components (1) and the guide components (2) are provided, and the two transmission components (1) and the two guide components (2) are respectively distributed diagonally on the mold.

5. The stacking mold according to claim 1, characterized in that: The fixed die mechanism comprises two fixed die assemblies (4) arranged back to back, and a guide positioning assembly and a support alignment assembly are further arranged between the fixed die assembly (4) and the movable die assembly (5).

6. The stacked mold according to claim 5, characterized in that: The fixed mold assembly (4) comprises a hot runner plate (41), a fixed mold plate (42) and a bottom plate (43) which are arranged in sequence from the inside to the outside, and the movable mold assembly (5) comprises a movable mold plate (51), a center connecting plate (52) and a push plate (53) which are arranged in sequence from the outside to the inside, and in a mold closing state, the bottom plate (43) is in contact with the push plate (53).

7. The stacked mold according to claim 6, characterized in that: The support alignment assembly comprises an insert plate (81) and a slot (82) that can cooperate with each other, wherein the slot (82) is opened on the outer side of the bottom plate (43), one end of the insert plate (81) is fixedly mounted on the movable plate (51), and the other end passes over the center link plate (52) and the push plate (53) and can be inserted into the slot (82).

8. The stacked mold according to claim 6, characterized in that: The guide positioning assembly comprises a positioning hole (72) and a guide column (71) for supporting the push plate (53); the positioning hole (72) is formed on the bottom plate (43); one end of the guide column (71) is fixedly connected to the movable plate (51), and the other end passes through the center connecting plate (52) and the push plate (53) and can be embedded in the positioning hole (72).

9. The stacked mold according to claim 8, characterized in that: The push plate (53) is slidably connected to the guide column (71) via a guide sleeve (73), and a driving assembly (6) for pushing the push plate (53) away from the middle link plate (52) is installed on the movable mold assembly (5).

10. The stacked mold according to claim 9, characterized in that: The driving assembly (6) comprises a telescopic assembly (61) fixedly mounted on the movable platen (51), the output end of the telescopic assembly (61) passing through the central connecting plate (52) is connected to a push rod (62), and the push rod (62) is fixedly mounted on the push plate (53).

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