Double-color mold with ejection mechanism driven by air cylinder

Abstract

The utility model discloses a double-color mold with an ejection mechanism driven by a cylinder. The double-color mold comprises a mold frame and a mold core, the mold frame comprises a rotating plate, a base plate, square iron and a bottom plate; an ejection space is formed between the base plate and the bottom plate, the ejection mechanism comprises an ejector pin, an ejection plate group and an adjustable cylinder which are fixedly connected, and the ejection plate group is assembled in the ejection space for ejection displacement; the output end of the adjustable cylinder is fixedly connected with the ejector plate group so as to drive the ejector plate group and the ejector pin to eject out or reset; the rotary ejection mechanism is assembled in the mold frame and is fixedly connected with the rotating plate; the rotary ejection mechanism comprises a positioning outer cylinder, an ejection shaft and a driving body, and the ejection shaft is sleeved with the positioning outer cylinder and slides in the positioning outer cylinder; the rotating plate, the ejection shaft and the driving body are sequentially connected, and the rotating plate is driven by the driving body to be separated from the base plate to rotate.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a two-color mold with an ejection mechanism driven by a cylinder. Background Art

[0002] In the traditional two-color mold structure, the ejector mechanism often uses a number of springs installed under the ejector plate group to drive the ejector plate group, and the ejector plate group drives the ejector pin to perform ejection displacement; during the injection molding process, the ejector pin is pressed tightly by the gravity and the pull-back force of the rotating plate, so that the ejector plate group is always in the return state; when the injection molding is completed and the mold needs to be opened for ejection, the rotating plate is driven to eject displacement, and the ejector plate group drives the ejector pin to eject displacement under the thrust of the spring, and keeps the ejection action synchronized with the rotating plate until the product is ejected; However, in the actual production process, due to the ejection The spring under the ejection group is a consumable part. As the frequency of mold opening and ejection increases, its performance will also weaken, resulting in a decrease in the force of the ejector plate group to drive the ejector displacement, making it impossible to achieve synchronous ejection action with the turn plate; and because the spring is affected by the mold temperature during the mold ejection process, it is easy for a spring to fail to spring out or spring out untimely, resulting in the evenly distributed springs not springing out synchronously, causing the ejection plate group to be stuck or even stuck, and then the product cannot be ejected smoothly, causing damage or destruction to the equipment and affecting the service life of the equipment. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the purpose of the present utility model is to provide a two-color mold with an ejection mechanism driven by a cylinder.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A two-color mold with a cylinder-driven ejection mechanism comprises a mold frame and a mold core; the mold frame comprises a rotating plate, a backing plate, a square iron, and a bottom plate; the mold core is fixedly mounted on the rotating plate, the square iron is fixed to the bottom plate, the backing plate is fixed on the square iron, an ejection space is defined between the backing plate and the bottom plate, and the mold further comprises an ejection mechanism and a rotary ejection mechanism, wherein the ejection mechanism is assembled within the mold frame, wherein:

[0006] The ejection mechanism includes a fixedly connected ejector pin, an ejector plate assembly, and an adjustable cylinder. The ejector plate assembly is assembled in the ejection space to perform ejection displacement. The ejector plate assembly is also equipped with an adjustable cylinder. The output end of the adjustable cylinder is fixedly connected to the ejector plate assembly to drive the ejector plate assembly and the ejector pin to eject or reset.

[0007] The rotary ejection mechanism is assembled in the mold frame and fixedly connected to the rotating plate; the rotary ejection mechanism includes a positioning outer cylinder, an ejection shaft and a driving body, the ejection shaft is sleeved inside the positioning outer cylinder and slides and displaces inside the positioning outer cylinder; the rotating plate, the ejection shaft and the driving body are connected in sequence, and the rotating plate is driven by the driving body to rotate away from the pad.

[0008] Further preferably, the mold core includes a first mold core and a second mold core, and the first mold core and the second mold core are symmetrically and adjacently arranged on the turn plate along the mold opening direction; a single color material is injected into the first mold core to obtain a single color product; different color materials are injected into the second mold core twice to obtain a two-color product.

[0009] Further preferably, the adjustable cylinder includes a fixing portion and a driving portion, wherein:

[0010] The fixing portion and the driving portion are fixedly connected;

[0011] The fixing portion is fixedly mounted on the outer surface of one side of the pad;

[0012] The end of the driving part is the output end, and the output end extends into the ejection space formed between the pad and the bottom plate, and is fixedly connected to the ejection plate assembly.

[0013] Further preferably, the adjustable cylinder further includes a travel switch, and the travel switch is fixedly mounted on an outer surface of one side of the fixing portion.

[0014] Further preferably, the travel switch is installed in a slide groove provided on the surface of the fixing portion, and the actuating ends of the two travel switches are arranged in opposite directions.

[0015] Further preferably, the two travel switches are respectively arranged in two parallel sliding grooves.

[0016] Further preferably, the two touch ends are respectively assembled in the two slide grooves, and the ends point in opposite directions.

[0017] Further preferably, the ejection shaft is a cylindrical shaft, the positioning outer cylinder is a cylindrical object, and the outer diameter of the ejection shaft is smaller than the inner diameter of the positioning outer cylinder.

[0018] Further preferably, the displacement distance of the ejection shaft inside the positioning outer cylinder is greater than the displacement distance of the ejection plate assembly inside the space formed between the pad and the bottom plate.

[0019] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0020] The utility model adopts an adjustable cylinder to drive the ejector plate group, and the ejector plate group drives the ejector pin to eject, so as to ensure the synchronous ejection displacement of the ejector pin and the rotary plate; by controlling the air pressure of the adjustable cylinder, the ejection speed of the ejector plate group is controlled, so that the ejection speed of the ejector plate group is greater than the ejection speed of the rotary plate, so as to maintain the synchronous ejection action of the ejector plate group and the rotary plate; in addition, the adjustable cylinder is provided with a stroke switch, and after the ejector pin completely ejects the product and leaves the mold, the stroke switch controls the cylinder pressure relief valve to relieve the pressure, so that the rotary plate, the ejector plate group and the ejector pin will not be affected by the ejection force of the cylinder when they are reset; and the ejection mechanism avoids the use of consumable parts such as springs as driving parts of the ejector plate group, so that the equipment structure is simpler and the ejection action is more stable and reliable, while reducing production and maintenance costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a two-color mold with a cylinder-driven ejection mechanism described in an embodiment of the present invention (the front mold assembly is omitted);

[0022] Figure 2 yes Figure 1 The structure shown in is a cross-sectional view along AA;

[0023] Figure 3 yes Figure 1 The structure shown in is a cross-sectional view along BB.

[0024] The symbols of the drawings in the above description are as follows:

[0025] 100. First mold core;

[0026] 200, second mold core;

[0027] 300, transfer board;

[0028] 400, pad;

[0029] 500, square iron;

[0030] 600, bottom plate;

[0031] 700, rotary ejection mechanism; 710, ejection shaft; 720, positioning outer cylinder;

[0032] 800, ejector mechanism; 810, ejector pin; 820, ejector plate assembly; 830, cylinder. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are all based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element of the present invention must have a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0035] Example

[0036] like Figures 1 to 3 As shown, the utility model discloses a two-color mold with a cylinder-driven ejection mechanism, comprising a mold frame, a mold core, an ejection mechanism 800 and a rotary ejection mechanism 700; the mold core, the ejection mechanism 800 and the rotary ejection mechanism 700 are respectively assembled in the mold frame; the mold frame comprises a front mold group (omitted in the figure) and a rear mold group; the front mold group (omitted in the figure) and the rear mold group are in contact;

[0037] The rear mold assembly includes a rotating plate 300, a pad 400, a square iron 500, and a bottom plate 600. The mold core is fixedly mounted on the rotating plate 300, and the open end of the mold core is in contact with the front mold assembly (omitted in the figure); there are two square irons 500, which are distributed in parallel on the bottom plate 600 and fixedly connected to the bottom plate 600. There is a certain distance between the two square irons 500; the pad 400 is fixed on the two square irons 500 so that the pad 400 and There is a certain space between the base plate 600; the ejection mechanism 800 is assembled in the space between the pad plate 400 and the base plate 600, and passes through the pad plate 400 and the rotating plate 300 in sequence and extends into the mold core; the rotary ejection mechanism 700 passes through the base plate 600 and the pad plate 400 in sequence, and is fixedly connected to the base plate 600 and the pad plate 400 respectively; the rotating plate 300 is in contact with the pad plate 400, and the rotating plate 300 is fixedly connected to the rotary ejection mechanism 700.

[0038] Specifically:

[0039] like Figures 2 to 3 As shown, the rotating plate 300 includes a first accommodating groove and a second accommodating groove, and the first accommodating groove and the second accommodating groove are symmetrically and adjacently arranged on the rotating plate 300 along the mold opening direction; the opening direction of the first accommodating groove is away from the bottom plate 600, and the opening direction of the second accommodating groove is away from the bottom plate 600; in this embodiment, the number of the first accommodating grooves is two, and the two first accommodating grooves are symmetrically and adjacently arranged on the pad 400 along the mold opening direction; the number of the second accommodating grooves is two, and the two second accommodating grooves are symmetrically and adjacently arranged on the pad 400 along the mold opening direction.

[0040] like Figures 2 to 3 As shown, the mold core includes a first mold core 100 and a second mold core 200, the first mold core 100 is fixed in the first accommodating groove, the open end of the first mold core 100 is back to the bottom plate 600, and is in contact with the front mold group (omitted in the figure) to form a first product molding cavity; a single color material is injected into the first product molding cavity, so that the product in the first product molding cavity is a single color product; the second mold core 200 is fixed in the second accommodating groove, the open end of the second mold core 200 is back to the bottom plate 600, and is in contact with the front mold group (omitted in the figure) to form a second product molding cavity; different color materials are injected into the second product molding cavity twice, so that the product in the second product molding cavity is a two-color product.

[0041] like Figure 1 As shown, the backing plate 400 includes a fixing groove, which is opened on the outer surface of the backing plate 400 close to the second mold core 200 along the mold opening direction, and the opening direction of the fixing groove is away from the second mold core 200.

[0042] like Figures 1 to 3 As shown, the ejection mechanism 800 includes an ejector pin 810, an ejector plate assembly 820, and a cylinder 830. The ejector plate assembly 820 is assembled in the space formed by the backing plate 400 and the bottom plate 600. One end of the ejector pin 810 is fixedly disposed on the ejector plate assembly 820. The other end of the ejector pin 810 sequentially passes through the backing plate 400 and the rotating plate 300, extends toward the mold core, and extends into the second product molding cavity to contact the two-color product. The cylinder 830 is fixed to the outer surface of one side of the backing plate 400 and is fixedly connected to the ejector plate assembly 820.

[0043] like Figure 1 As shown, the cylinder 830 includes a fixing portion, a driving portion and a travel switch; the fixing portion and the driving portion are fixedly connected, the fixing portion is fixedly assembled in the fixing groove, and the travel switch is fixedly mounted on the outer surface of one side of the fixing portion;

[0044] The end of the driving part is the output end, which extends into the ejection space formed between the backing plate 400 and the bottom plate 600 and is fixedly connected to the ejection plate assembly 820; so that the cylinder 830 drives the ejection plate assembly 820 to move along the mold opening direction within the space formed between the backing plate 400 and the bottom plate 600;

[0045] The outer surface of the fixing portion facing away from the backing plate is provided with two parallel sliding grooves, each of which is provided with a travel switch, and the touch ends of each travel switch are arranged in opposite directions. Specifically, the touch ends of the two travel switches point in opposite directions.

[0046] It is worth noting that the cylinder 830 in the present invention is an adjustable cylinder, that is, the air pressure in the cylinder 830 is adjusted by the travel switch to control the magnitude of the driving force of the cylinder 830, thereby achieving the purpose of adjusting the ejection speed of the ejector plate assembly 820 and the ejector pin 810 and quick reset;

[0047] The travel switch adjusts the pressure increase of the cylinder 830, and the adjustable cylinder drives the driving part, and the driving part drives the ejector plate group 820 to move toward the mold core, thereby driving the ejector pin 810 to eject toward the mold core along the mold opening direction; the travel switch adjusts the pressure relief of the cylinder 830, and the adjustable cylinder drives the driving part, and the driving part drives the ejector plate group 820 to move toward the bottom plate, thereby driving the ejector pin 810 to reset toward the bottom plate along the mold opening direction.

[0048] like Figure 2 As shown, the rotary ejection mechanism 700 includes a positioning outer cylinder 720, an ejection shaft 710 and a driving body; the ejection shaft 710 is a cylindrical shaft, the positioning outer cylinder 720 is a cylindrical object, and the outer diameter of the ejection shaft 710 is smaller than the inner diameter of the positioning outer cylinder 720; the positioning outer cylinder 720 passes through the base plate 600, extends into the space formed between the pad 400 and the base plate 600, and is fixedly connected to the base plate 600; the ejection shaft 710 is sleeved inside the positioning outer cylinder 720, and slides and rotates axially inside the positioning outer cylinder 720; the displacement distance of the ejection shaft 710 inside the positioning outer cylinder 720 is greater than the displacement distance of the ejection shaft 710 inside the positioning outer cylinder 720 The displacement distance of the ejector plate group 820 inside the space formed between the pad 400 and the base plate 600; one end of the ejector shaft 710 is fixedly connected to the driving body, and the other end of the ejector shaft 710 passes through the pad 400, extends into the rotating plate 300, and is fixedly connected to the rotating plate 300; the driving body provides the ejector shaft 710 with axial telescopic driving force and axial rotation driving force; it is worth noting that: the driving body in the present utility model is a dual driving force mechanism that can provide axial telescopic and axial rotation at the same time, for example but not limited to, a multi-color rotating core driving mechanism described in Chinese patent application publication number CN116160624A.

[0049] When the driving body provides an axial extension and contraction driving force to the ejection shaft 710, the driving body drives the ejection shaft 710 to reciprocate along the mold opening direction inside the positioning outer cylinder 720, thereby causing the rotating plate 300 to perform ejection displacement and reset displacement along the mold opening direction;

[0050] When the driving body provides an axial rotational driving force to the ejection shaft 710, the driving body drives the ejection shaft 710 to rotate axially inside the positioning outer cylinder 720, so that the rotating plate 300 rotates relative to the pad 400 with the axis of the ejection shaft 710 as the center of the circle; preferably: in the present utility model, the rotation angle provided by the driving body is 180°.

[0051] When the driving body provides an axial telescopic driving force, the driving body drives the ejection shaft 710 to move inside the positioning outer cylinder 720 along the mold opening direction toward the direction away from the backing plate 400 for ejection; at the same time, the ejection shaft 710 drives the rotating plate 300, the first mold core 100, and the second mold core 200 to move along the mold opening direction toward the direction away from the backing plate 400 for ejection; when the rotating plate 300 moves to completely separate from the ejector pin 810, the axial telescopic driving force provided by the driving body stops, so that the ejection shaft 710 Inside the positioning outer cylinder 720, the ejection displacement is completed along the mold opening direction away from the backing plate 400; at this time, the driving body starts to provide axial rotation driving force, so that the driving body drives the ejection shaft 710 to rotate 180 degrees along the axial direction inside the positioning outer cylinder 720, and then drives the rotating plate 300, the first mold core 100, and the second mold core 200 to rotate 180 degrees relative to the backing plate 400 with the axis of the ejection shaft 710 as the center of the circle, and then the first mold core 100 and the second mold core 200 are rotated 180 degrees. Figures 1 to 3 At the same time, the axial rotation driving force provided by the driving body stops; the driving body continues to provide the axial telescopic driving force to drive the ejector shaft 710 inside the positioning outer cylinder 720, and displaces toward the backing plate 400 along the mold opening direction, thereby driving the rotating plate 300, the first mold core 100, and the second mold core 200 to reset.

[0052] In summary: Figures 1 to 3 As shown, the working principle of a two-color mold with a cylinder-driven ejection mechanism is as follows:

[0053] Step 1: Ejection:

[0054] When the mold is completed and needs to be opened for ejection, the adjustable cylinder drives the ejector plate assembly 820 to perform ejection displacement along the mold opening direction toward the mold core within the space formed between the backing plate 400 and the bottom plate 600; the ejector plate assembly 820 drives the ejector pin 810 to perform ejection displacement along the mold opening direction toward the mold core, thereby ejecting the two-color product from the second mold core 200, until the two-color product is completely separated from the second mold core 200, and the ejection displacement ends;

[0055] At the same time, the driving body provides an axial telescopic driving force, so that the driving body drives the ejection shaft 710 to perform ejection displacement along the mold opening direction toward the mold core inside the positioning outer cylinder 720, and the ejection shaft 710 drives the rotating plate 300, the first mold core 100, and the second mold core 200 to perform ejection displacement along the mold opening direction toward the mold core; when the rotating plate 300 is displaced to completely separate from the ejector pin 810, the driving body stops providing the axial telescopic driving force, so that the ejection shaft 710 ends its ejection displacement along the mold opening direction toward the mold core inside the positioning outer cylinder 720.

[0056] Step 2: Rotate the board:

[0057] When the ejection displacement of the ejector plate group 820 and the ejector shaft 710 along the mold opening direction is completed, the driving body provides an axial rotation driving force, so that the driving body drives the ejector shaft 710 to rotate 180 degrees along the axial direction inside the positioning outer cylinder 720, and then drives the rotating plate 300, the first mold core 100, and the second mold core 200 to rotate 180 degrees relative to the backing plate 400 with the axis of the ejector shaft 710 as the center of the circle, thereby causing the first mold core 100 and the second mold core 200 to rotate 180 degrees in the mold opening direction. Figures 1 to 3 The positions in the middle are interchanged, at which point the axial rotational driving force provided by the driving body stops.

[0058] Step 2: Reset:

[0059] The driving body provides an axial telescopic driving force to drive the ejector shaft 710 to move inside the positioning outer cylinder 720 along the mold opening direction toward the backing plate 400, thereby driving the rotating plate 300, the first mold core 100, and the second mold core 200 to reset; at the same time, the adjustable cylinder drives the ejector plate group 820, and the ejector plate group 820 drives the ejector pin 810 to reset.

[0060] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A two-color mold with a cylinder-driven ejection mechanism, comprising a mold frame and a mold core; the mold frame comprises a rotating plate, a backing plate, a square iron, and a bottom plate; the mold core is fixedly mounted on the rotating plate, the square iron is fixed to the bottom plate, the backing plate is fixed on the square iron, and an ejection space is defined between the backing plate and the bottom plate, characterized in that: It also includes an ejection mechanism and a rotary ejection mechanism, wherein the ejection mechanism is assembled in the mold frame, wherein: The ejection mechanism includes a fixedly connected ejector pin, an ejector plate assembly, and an adjustable cylinder. The ejector plate assembly is assembled in the ejection space to perform ejection displacement. The ejector plate assembly is also equipped with an adjustable cylinder. The output end of the adjustable cylinder is fixedly connected to the ejector plate assembly to drive the ejector plate assembly and the ejector pin to eject or reset. The rotary ejection mechanism is assembled in the mold frame and fixedly connected to the rotating plate; the rotary ejection mechanism includes a positioning outer cylinder, an ejection shaft and a driving body, the ejection shaft is sleeved inside the positioning outer cylinder and slides and displaces inside the positioning outer cylinder; the rotating plate, the ejection shaft and the driving body are connected in sequence, and the rotating plate is driven by the driving body to rotate away from the pad.

2. A two-color mold with a cylinder-driven ejection mechanism according to claim 1, characterized in that: The mold core includes a first mold core and a second mold core, and the first mold core and the second mold core are symmetrically and adjacently arranged on the rotating plate along the mold opening direction; a single color material is injected into the first mold core to obtain a single color product; different color materials are injected into the second mold core twice to obtain a two-color product.

3. A two-color mold with a cylinder-driven ejection mechanism according to claim 2, characterized in that: The adjustable cylinder includes a fixing portion and a driving portion, wherein: The fixing portion and the driving portion are fixedly connected; The fixing portion is fixedly mounted on the outer surface of one side of the pad; The end of the driving part is the output end, and the output end extends into the ejection space formed between the pad and the bottom plate, and is fixedly connected to the ejection plate assembly.

4. A two-color mold with a cylinder-driven ejection mechanism according to claim 3, characterized in that: The adjustable cylinder further includes a travel switch, which is fixedly mounted on an outer surface of one side of the fixing portion.

5. A two-color mold with a cylinder-driven ejection mechanism according to claim 4, characterized in that: The travel switches are installed in a sliding groove on the surface of the fixing portion, and the actuating ends of the two travel switches are arranged in opposite directions.

6. A two-color mold with a cylinder-driven ejection mechanism according to claim 5, characterized in that: The two travel switches are respectively arranged in two parallel sliding grooves.

7. A two-color mold with a cylinder-driven ejection mechanism according to claim 6, characterized in that: The two actuating ends are respectively assembled in the two sliding grooves, with their ends pointing in opposite directions.

8. The two-color mold with a cylinder-driven ejection mechanism according to claim 1, characterized in that: The ejection shaft is a columnar shaft, the positioning outer cylinder is a cylindrical object, and the outer diameter of the ejection shaft is smaller than the inner diameter of the positioning outer cylinder.

9. The two-color mold with a cylinder-driven ejection mechanism according to claim 8, characterized in that: The displacement distance of the ejection shaft inside the positioning outer cylinder is greater than the displacement distance of the ejection plate assembly inside the space formed between the backing plate and the bottom plate.

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