Ejection assisting mechanism for two-color core transfer mold

Abstract

A kind of ejection auxiliary mechanism for two-color core transfer mold, it is equipped on the mold frame of two-color core transfer mold, it includes base, connecting rod, driving block and spring piece, the base is connected with the ejection plate group of mold frame, and with the ejection plate group synchronous ejection movement or reset movement;The one end of the connecting rod is rotatably connected with the base, the other end is detachably buckled with the rotating plate of mold frame, the other end of the connecting rod is equipped with guide rod;The driving block is close to the other end of connecting rod setting, it is provided with rotating driving surface;The one end of the spring piece is fixedly connected with the connecting rod, the other end can be resisted with rotating connecting rod;The base is driven displacement by ejection plate group, to drive connecting rod and guide rod synchronous displacement;Displacement guide rod is displaced along rotating driving surface, to drive the connecting rod rotate relative to mold frame;Rotating connecting rod and spring piece abut or separate, drive connecting rod and the rotating plate separate or buckle.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to an ejection auxiliary mechanism for a two-color rotating core mold. Background Technology

[0002] Two-color molds consist of a one-color product molding section and a two-color product molding section. During injection molding, the one-color product must be injected first, and then the two-color product is injected on top of the one-color product. In the current mold industry, two-color molds are generally divided into two types: rotating rear molds and rotating core molds. For rotating core molds, there is only one rear mold section. The rotating core ejects and rotates to bring the one-color product into the two-color product molding section. Because part of the one-color product is located in the fixed cavity, it will be pulled during ejection, causing product deformation or displacement. When rotating to the two-color cavity for injection molding, there are risks such as mold damage and product defects.

[0003] To solve this problem, ejector pins need to be added to assist ejection in some products of the same color. Traditional ejection methods such as spring ejection and cylinder ejection can be used. However, after implementing the above technical solution, the auxiliary means such as rotating core ejection and spring / cylinder ejection have the problem of asynchronous movement during the specific implementation process.

[0004] Therefore, how to improve the ejection mechanism of a two-color mold to achieve the effect of adjustable ejection stroke, more stable and reliable operation, and reduced maintenance costs for a single-color product is one of the technical problems that needs to be solved by those skilled in the art. Utility Model Content

[0005] To address the technical problems existing in the prior art, the purpose of this utility model is to provide an ejection auxiliary mechanism for a two-color rotating core mold.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An ejection auxiliary mechanism for a two-color rotating core mold is assembled on the mold frame of the two-color rotating core mold. It includes a base, a connecting rod, a drive block, and a spring plate, wherein:

[0008] The base is connected to the ejector plate assembly of the mold frame and performs ejection or resetting movements synchronously with the ejector plate assembly;

[0009] One end of the connecting rod is rotatably connected to the base, and the other end is detachably fastened to the rotating plate of the mold frame. A guide rod is installed on the other end of the connecting rod.

[0010] The drive block is located near the other end of the connecting rod and has a rotation drive surface.

[0011] One end of the spring sheet is fixedly connected to the connecting rod, and the other end can abut against the rotating connecting rod;

[0012] The base is pushed out of the plate assembly and driven to move, so as to drive the connecting rod and guide rod to move synchronously; the guide rod moves along the rotation driving surface to drive the connecting rod to rotate relative to the mold frame; the rotating connecting rod abuts or separates from the spring plate, driving the connecting rod to separate or engage with the rotating plate.

[0013] A further preferred embodiment: the spring sheet is arc-shaped, with its opening facing the connecting rod direction;

[0014] The connecting rod, driven to rotate away from the mold frame, abuts against the other end of the spring plate to compress the spring plate for elastic return;

[0015] The compressed spring plate abuts against the connecting rod and rotates toward the mold frame.

[0016] A further preferred embodiment is that the thickness of the spring sheet decreases from one end to the other.

[0017] A further preferred embodiment: a positioning block is provided at the other end of the connecting rod, and a positioning groove is provided on the rotating plate;

[0018] The positioning block is inserted into the positioning groove as the connecting rod rotates, so that the connecting rod and the rotating plate are engaged, thereby positioning the rotating plate;

[0019] The positioning block disengages from the positioning groove as the connecting rod rotates in the opposite direction, causing the connecting rod to separate from the rotating plate, thereby releasing the rotating plate.

[0020] A further preferred embodiment is that the rotation driving surface is an inclined surface of the driving block facing away from the mold frame.

[0021] A further preferred embodiment: the drive block is fixed to a lever;

[0022] The lever is arranged adjacent to the connecting rod and is distributed parallel to the connecting rod.

[0023] A further preferred embodiment: the lever is provided with a smooth driving surface, the driving surface is connected to the rotation driving surface, and is arranged sequentially along the ejection movement direction of the ejector plate assembly.

[0024] A further preferred embodiment: the base has a U-shaped opening, one end of the connecting rod is placed inside the U-shaped opening, and is rotatably connected to the base via a pivot.

[0025] A further preferred embodiment: the base is fixedly connected to the top plate assembly via a connecting block.

[0026] A further preferred embodiment: the drive rod is perpendicular to the connecting rod.

[0027] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0028] This utility model adopts a mechanical structure, which uses an arc-shaped spring sheet and a lever structure component to form an auxiliary ejection structure. This makes the ejection process of the product uniform, avoiding the risk of damage to the product and mold, and achieving the technical effect of more stable and reliable operation and reduced maintenance costs. Attached Figure Description

[0029] Figure 1 Yes; a three-dimensional structural diagram of the ejection auxiliary mechanism for the two-color rotating core mold described in this embodiment of the present invention. Figure 1 ;

[0030] Figure 2 This is a three-dimensional structural schematic diagram of the ejection auxiliary mechanism for the two-color rotating core mold described in this embodiment of the utility model. Figure 2 ;

[0031] Figure 3 yes Figure 1 The diagram shown omits part of the mold frame structure. Figure 1 ;

[0032] Figure 4 This is a cross-sectional view of the ejection auxiliary mechanism for the two-color rotating core mold described in this embodiment of the utility model;

[0033] Figure 5 This is a structural breakdown of the ejection auxiliary mechanism for the two-color rotating core mold described in this embodiment of the invention, after omitting part of the mold frame structure. Figure 1 ;

[0034] Figure 6 This is a structural breakdown of the ejection auxiliary mechanism for the two-color rotating core mold described in this embodiment of the invention, after omitting part of the mold frame structure. Figure 2 .

[0035] The markings on the accompanying drawings in the above specification are explained as follows:

[0036] 100. Ejector plate assembly; 110. Ejector panel; 120. Ejector base plate; 200. Connecting block; 300. Base; 310. Rotating shaft; 400. Spring plate; 500. Connecting rod; 510. Positioning block; 520. Guide rod; 600. Lever; 610. Drive block; 700. Rotating plate; 710. Positioning groove; 800. Pad; 900. Fixing plate. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0038] It should be noted that in this utility model, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element of this utility model must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Example

[0040] To address the technical problem of product damage in the ejection mechanism of single-color products in existing two-color rotary core molds, those skilled in the art have designed an ejection auxiliary mechanism for two-color rotary core molds through persistent research. This mechanism is installed on the outside of the mold frame of the two-color rotary core mold and works in conjunction with the ejection plate assembly for single-color products to perform the ejection operation. While solving the technical problems existing in the prior art, it also achieves more stable and reliable operation and reduces maintenance costs.

[0041] like Figure 1 and Figure 2 As shown, the ejection auxiliary mechanism described in this technical solution is applicable to a two-color rotating core mold, and therefore, it is assembled on a two-color rotating core mold. The two-color rotating core mold has a mold frame; the mold frame must include a rotating plate 700, a pad plate 800, a fixing plate 900, and an ejection plate assembly 100. The rotating plate 700, the pad plate 800, and the fixing plate 900 are stacked. The ejection plate assembly 100 is positioned close to the fixing plate 900 and spaced apart from it, thus reserving sufficient ejection space. The ejection plate assembly 100 can be driven to perform mold opening and resetting movements along the mold opening direction. During the mold opening and resetting movements, the ejection plate assembly 100 moves closer to or further away from the fixing plate 900.

[0042] Specifically: such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the ejector plate assembly 100 includes an ejector panel 110 and an ejector base plate 120. The ejector panel 110 is fixedly connected to the ejector floor and is disposed close to the fixed plate 900. In addition, in order to realize the ejection of products of the same color, several matching ejector pins are fixedly installed on the ejector plate assembly to realize the ejection operation.

[0043] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the ejection auxiliary mechanism for the two-color rotating core mold includes a base 300, a connecting rod 500, a lever 600, and a spring plate 400. The connecting rod 500 and the lever 600 are arranged parallel to each other along the mold opening direction (i.e., the ejection direction of the ejector plate assembly 100), meaning the connecting rod 500 and the lever 600 are adjacent and parallel. The spring plate 400 is mounted on the connecting rod 500, and the base 300 is fixedly connected to the ejector plate assembly 100. It should be noted that one end of the connecting rod 500 is rotatably connected to the base 300.

[0044] like Figure 5 and Figure 6 As shown, the base 300 is a block with a U-shaped opening, which is fixedly mounted on the fixing plate 900 assembly. In this embodiment, to accommodate the size and structure of the mold, the base 300 is connected to the fixing plate 900 assembly via a connecting block 200. Specifically, the connecting block 200 is fixed to the ejector base plate 120 of the ejector plate assembly 100, and the base 300 is secured to the connecting block 200 with screws. The U-shaped opening of the base 300 faces the fixing plate 900. The base 300 is positioned outside the mold frame relative to the connecting block 200. Preferably, the base 300 is positioned closer to the fixing plate 900 than the connecting block 200.

[0045] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the connecting rod 500 is a straight rod with a hinged end and a positioning end. The hinged end of the connecting rod 500 has a hinge portion integrally connected to the connecting rod 500. The connecting rod 500 is rotatably connected to the base 300 through the hinge portion. Specifically, the hinge portion is inserted into the U-shaped opening of the base 300, and a rotating shaft 310 passes through the base 300 and the hinge portion, thus obtaining a structure that can rotate relative to the base 300. That is, the connecting rod 500 can rotate relative to the mold frame about the rotating shaft 310, thereby achieving the purpose of rotating closer to or away from the mold frame. According to the installation direction of the connecting rod 500, the positioning end of the connecting rod 500 is placed at the rotating plate 700; combined with... Figure 4As shown, the positioning end of the connecting rod 500 has a positioning block 510. The positioning block 510 is located at the end of the connecting rod 500 and protrudes from the connecting rod 500. The positioning block 510 can be inserted into the positioning groove 710 of the rotating plate 700 to position the rotating plate 700. When the positioning block 510 is inserted into the positioning groove 710, the connecting rod 500 is engaged with the rotating block, so that the rotating plate 700 is positioned relative to the ejector plate assembly 100 through the connecting rod 500. When the positioning block 510 is pulled out from the positioning groove 710, that is, the connecting rod 500 is separated from the rotating plate 700, thereby releasing the rotating plate 700 to adapt to the rotating core and achieve the transfer of the single-color product.

[0046] like Figure 1 , Figure 2 , Figure 3 As shown, the positioning end of the connecting rod 500 is also provided with a guide rod 520, the axial direction of which is perpendicular to the connecting rod 500.

[0047] It should be noted that: such as Figures 1 to 6 As shown, the spring plate 400 is an arc-shaped spring plate, which is disposed at the hinge end of the connecting rod 500. The opening of the spring plate 400 faces the connecting rod 500, one end of which is fixed to the base 300 by a screw, and the other end abuts against the connecting rod 500. Specifically: for easy distinction, the end of the spring plate 400 connected to the base 300 is the fixed end, and the thickness of the spring plate 400 decreases from its fixed end toward its other end. The end with the smallest thickness is the driving end, which abuts against the connecting rod 500, thereby allowing the spring plate 400 to store energy, which is then used to drive the connecting rod 500 to rotate and reset.

[0048] like Figure 1 As shown, the lever 600 is positioned adjacent to and parallel to the connecting rod 500. The lever 600 is a straight rod, fixedly mounted on the mold frame, with its side facing away from the mold frame serving as a guide surface. It should be noted that the guide surface is smooth. The lever 600 is positioned between the guide rod 520 and the mold frame, allowing the guide surface to engage with the guide rod 520. During the ejection operation driven by the ejector plate assembly 100, the guide rod 520 moves along the guide surface. Specifically, the lever 600 has a fixed end and a free end. The fixed end is fixedly connected to the fixed plate 900, and the free end is positioned close to the rotating plate 700 but is not connected to it.

[0049] It should be noted that: such as Figure 1 , Figure 2 and Figure 3As shown, the lever 600 is equipped with a drive block 610 that drives the connecting rod 500 to rotate. Specifically: the drive block 610 is fixed to the guide surface of the free end of the lever 600; the drive block 610 is a single piece, locked to the lever 600 by screws; rotation drive surfaces are respectively provided along the lifting and lowering displacement direction of the guide rod 520, and the rotation drive surfaces are set to adapt to the ejection and resetting processes of the guide rod 520. The ejection guide surface is an inclined surface set away from the mold frame. In addition, another inclined surface is also provided on the drive block 610, which is spaced apart from the rotation drive surface, and both are arranged sequentially along the movement direction of the connecting rod 500. The other inclined surface of the drive block 610 is set further away from the ejection plate assembly 100 than the rotation drive surface.

[0050] Combination Figures 1 to 6 As shown, based on the structural design of the above components, the operation of the ejection auxiliary mechanism for the two-color rotating core mold described in this utility model is as follows:

[0051] Ejection Operation: The driven ejector plate assembly 100 performs ejection displacement to carry out the ejection operation. During the ejection operation, the ejector plate assembly 100 drives the connecting rod 500 to move synchronously through the connecting block 200 and the base 300. The connecting rod 500, which moves the positioning block 510 and the guide rod 520 to move synchronously. At this time, the guide rod 520 moves along the guide surface of the lever 600 towards the driving block 610 until it reaches the ejection guide surface position of the driving block 610. Subsequently, since the positioning end of the connecting rod 500 is not fixed, in conjunction with the ejection drive surface, the connecting rod 500 is driven to rotate away from the mold frame by the guide rod 520. The rotating connecting rod 500 presses against the spring sheet 400. At this time, the driven rotating connecting rod 500 drives the positioning block 510 to be pulled out from the positioning groove 710, thereby releasing the rotating plate 700 and achieving the effect of separating the rotating plate 700 from the ejection plate assembly 100. The rotating plate 700 can be rotated to adapt to the molding process of two-color products.

[0052] Reset Operation: The connecting rod 500, having completed its ejection operation, is driven to reset via the mold closing action; that is, the component performing the mold closing movement is driven to perform a reset displacement by the ejector pin pushing the ejector plate assembly 100. The reset displacement ejector plate assembly drives the connecting rod 500 to perform a reset movement through the connecting block 200 and the base 300; the connecting rod 500, performing the reset movement, is simultaneously driven to rotate towards the mold frame by the elastic reset force of the spring plate 400 (due to the energy stored in the spring plate 400 being pressed by the connecting rod 500). At this time, the connecting rod 500 also rotates in the opposite direction towards the mold frame while performing the reset movement (Note: in the process of resetting, the connecting rod 500 rotates in the opposite direction towards the mold frame). During the rotation of rod 500 toward the mold frame, guide rod 520 moves along the direction of the smooth drive surface of the rotation drive surface to guide the connecting rod 500 to continue to perform reset displacement after completing the rotation. It should be noted that at this time, the rotating plate 700 also resets toward the pad 800 (i.e., the rotating plate 700 resets toward the pad 800 until it overlaps with the pad 800). The rotating connecting rod 500 drives the positioning block 510 to rotate toward the positioning direction of the reset rotating plate 700. Finally, the positioning block 510 is inserted into the positioning groove 710, completing the reset movement of the rotating plate 700 and the ejector plate assembly 100.

[0053] In summary, the technical solution described in this embodiment completes the ejection operation of a single-color mold by using a mechanical auxiliary mechanism in conjunction with the ejector plate assembly 100 (i.e., ejector pins fixed on the ejector plate assembly 100), achieving synchronous movement, while avoiding risks such as product deformation, resulting in more stable and reliable operation and lower maintenance costs.

[0054] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An ejection auxiliary mechanism for a two-color rotating core mold, which is mounted on the mold frame of the two-color rotating core mold, characterized in that: It includes a base, connecting rod, drive block, and spring plate, wherein: The base is connected to the ejector plate assembly of the mold frame and performs ejection or resetting movements synchronously with the ejector plate assembly; One end of the connecting rod is rotatably connected to the base, and the other end is detachably fastened to the rotating plate of the mold frame. A guide rod is installed on the other end of the connecting rod. The drive block is located near the other end of the connecting rod and has a rotation drive surface. One end of the spring sheet is fixedly connected to the connecting rod, and the other end can abut against the rotating connecting rod; The base is pushed out of the plate assembly and driven to move, so as to drive the connecting rod and guide rod to move synchronously to position or reset; the guide rod moves along the rotation driving surface to drive the connecting rod to rotate relative to the mold frame; the rotating connecting rod abuts or separates from the spring plate, driving the connecting rod to separate or engage with the rotating plate.

2. The ejection auxiliary mechanism for a two-color rotating core mold according to claim 1, characterized in that: The spring sheet is arc-shaped, with its opening facing the connecting rod direction; The connecting rod, driven to rotate away from the mold frame, abuts against the other end of the spring plate to compress the spring plate for elastic return; The compressed spring plate abuts against the connecting rod and rotates toward the mold frame.

3. The ejection auxiliary mechanism for a two-color rotating core mold according to claim 2, characterized in that: The thickness of the spring sheet decreases from one end to the other.

4. The ejection auxiliary mechanism for a two-color rotating core mold according to claim 1, characterized in that: The other end of the connecting rod is provided with a positioning block, and the rotating plate is provided with a positioning groove; The positioning block is inserted into the positioning groove as the connecting rod rotates, so that the connecting rod and the rotating plate are engaged, thereby positioning the rotating plate; The positioning block disengages from the positioning groove as the connecting rod rotates in the opposite direction, causing the connecting rod to separate from the rotating plate, thereby releasing the rotating plate.

5. The ejection auxiliary mechanism for a two-color rotating core mold according to claim 1, characterized in that: The rotation drive surface is an inclined surface of the drive block facing away from the mold frame.

6. The ejection auxiliary mechanism for a two-color rotating core mold according to claim 1, characterized in that: The drive block is fixed to a lever; The lever is arranged adjacent to the connecting rod and is distributed parallel to the connecting rod.

7. The ejection auxiliary mechanism for a two-color rotating core mold according to claim 6, characterized in that: The lever is provided with a smooth driving surface, which is connected to the rotation driving surface and is arranged sequentially along the ejection direction of the ejection plate assembly.

8. The ejection auxiliary mechanism for a two-color rotating core mold according to claim 1, characterized in that: The base has a U-shaped opening, and one end of the connecting rod is placed inside the U-shaped opening and is rotatably connected to the base via a pivot.

9. The ejection auxiliary mechanism for a two-color rotating core mold according to claim 1, characterized in that: The base is fixedly connected to the top plate assembly via a connecting block.

10. The ejection auxiliary mechanism for a two-color rotating core mold according to claim 1, characterized in that: The drive rod is perpendicular to the connecting rod.

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