Injection mold with front mold separation core-pulling structure

Abstract

The utility model discloses an injection mold with a front mold separation core-pulling structure, which comprises a front module, a rear module and a mold core, the front module comprises a front base plate and a front mold plate, and the front base plate is in sliding connection with the front mold plate; a product forming cavity is formed in the mold core, the mold core comprises a front mold core body and a rear mold core body, the arc core pulling structure further comprises an arc core pulling structure, the arc core pulling structure comprises a sliding block and a core, the core penetrates through the front mold core body, and a gap exists between the core and the rear mold core body; the sliding block is fixedly connected with the front base plate, and is connected and linked with the core through a positioning shaft; the sliding block is driven by the front base plate, and the core is driven by the positioning shaft to rotate in the mold core so as to be released from and separated from a product in the product forming cavity; the power part of the core pulling structure adopts a pure mechanical structure principle, the structure is simple and stable, and the problem that the core cannot be pulled due to the damage of an oil cylinder or other transmission devices is solved.

Description

Technical Field

[0001] The utility model relates to the field of molds, and particularly to an injection mold with a front mold separating core-pulling structure. Background Technique

[0002] The Chinese published patent authorization announcement number is: CN218876156U, which includes a rotating core-pulling group and a sliding seat. The rotating core-pulling group includes an arc insert and a rotating driving mechanism. The arc insert is assembled on the sliding seat and is driven by the rotating driving mechanism to perform core-pulling rotation; the sliding seat is driven by a moving oil cylinder to perform core-pulling displacement; the rotating driving mechanism is composed of a gear and a rack engaged with each other. The gear is connected to the arc insert, the rack is arranged tangentially to the gear, and the rack is driven by a rotating oil cylinder to displace; the core-pulling displacement direction of the sliding seat is perpendicular to the displacement direction of the rack; in the above technical solution, the cooperation of the oil cylinder and the rack is adopted to drive the core-pulling mechanism, so that the core-pulling mechanism is relatively complex, very unstable during the core-pulling process, and prone to failure, resulting in the inability to complete core-pulling and damage to the product.

[0003] Therefore, how to improve the driving mode of the core-pulling mechanism of the mold to achieve the purpose of stably completing core-pulling by using a simple mechanical mechanism during the mold opening process is one of the technical problems that need to be solved by those skilled in the art. Content of the Utility Model

[0004] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide an injection mold with a front mold separating core-pulling structure.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An injection mold with a front mold separating core-pulling structure includes a front mold group, a rear mold group and a mold core. The front mold group includes a front backing plate and a front template, and the front backing plate is slidably connected to the front template; a product forming cavity is provided in the mold core, the mold core includes a front mold core and a rear mold core, and further includes an arc core-pulling structure. The arc core-pulling structure includes a slider and a core, wherein:

[0007] The core passes through the front mold core and there is a gap between the core and the rear mold core;

[0008] The slider is fixedly connected to the front backing plate and is connected and linked to the core through a positioning shaft;

[0009] The slider is driven by the front backing plate, and the core is driven by the positioning shaft to rotate in the mold core to disengage and separate from the product in the product forming cavity.

[0010] Further preferably: The core is rotatably connected to the rear mold core.

[0011] Further preferably, the core has a rotating shaft and is rotatably connected to the rear mold core via the rotating shaft.

[0012] Further preferably, the core is provided with a core slide groove, and the core slide groove is a groove with an L-shaped cross section;

[0013] One end of the sliding block extends into the core sliding groove and is connected to the core through the positioning shaft.

[0014] Further preferably, the core is provided with a core slot, and the core slot is a groove;

[0015] There is a mold core gap between the front mold core and the rear mold core, and the protrusion of the front mold core is inserted into the core slot and encloses a hook-shaped cavity with the core;

[0016] The cavity, the mold core gap, and the gap between the core and the rear mold core are interconnected to form the product molding cavity, and the cavity is the hook portion of the product molding cavity.

[0017] Further preferably, a positioning shaft limiting hole is provided at one end of the slider, and the positioning shaft passes through the positioning shaft limiting hole and is fixedly connected to the front mold core;

[0018] The driven slider drives the core to move in a linkage manner within the maximum aperture range of the positioning shaft limiting hole.

[0019] Further preferably, the positioning shaft limiting hole is a bar-shaped through hole.

[0020] Further preferably, it further includes a mold opening limiting structure, the mold opening limiting structure includes a limiting screw and a limiting screw slot, wherein:

[0021] One end of the limit screw is slidably connected to the limit screw sliding groove, and the other end of the limit screw passes through the front template and is fixedly connected to the front pad;

[0022] The limiting screw extends into the limiting screw slot to limit the opening and closing displacement distance between the front pad and the front template.

[0023] Further preferably, the limiting screw comprises a limiting portion and a fixing portion, and the limiting portion and the fixing portion are fixedly connected and integrally formed.

[0024] Further preferably, the outer diameter of the limiting portion is larger than the outer diameter of the fixing portion.

[0025] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0026] In this technical solution, by limiting the displacement distance of the limit screw in the limit screw chute, the separation of the front backing plate and the front template is precisely controlled, and then the slider is driven to rotate the core, completing the core pulling work; the power part of the core pulling structure of this design adopts the pure mechanical structure principle, with a simple and stable structure, convenient installation and use, avoiding problems such as inability to pull the core due to damage to the oil cylinder or other transmission devices, and even scratching the product during core pulling, greatly improving the production efficiency. Brief Description of the Drawings

[0027] Figure 1 is a three-dimensional structural schematic diagram of an injection mold structure with a front mold detachment core pulling structure described in an embodiment of the present utility model;

[0028] Figure 2 is Figure 1 a sectional view of the structure shown in along A-A;

[0029] Figure 3 is Figure 1 a sectional view of the structure shown in along B-B;

[0030] Figure 4 is a three-dimensional structural schematic diagram of the arc core pulling structure described in an embodiment of the present utility model;

[0031] Figure 5 is a structural schematic diagram of the arc core pulling structure in the mold closing state described in an embodiment of the present utility model;

[0032] Figure 6 is a structural schematic diagram of the arc core pulling structure in the core pulling state described in an embodiment of the present utility model;

[0033] Figure 7 is a structural schematic diagram of the product described in an embodiment of the present utility model.

[0034] The reference numerals in the above-mentioned drawings of the specification are explained as follows:

[0035] 100, front mold group; 110, top plate; 120, front backing plate; 130, front template; 131, limit screw;

[0036] 200, rear mold group; 210, bottom plate; 220, rear backing plate; 230, square iron; 240, rear template; 250, ejector plate group; 260, ejector pin;

[0037] 300, mold core; 310, front mold core; 320, rear mold core;

[0038] 400, arc core pulling structure;

[0039] 410, slider; 420, core; 421, rotating shaft; 422, positioning shaft;

[0040] 500. Product. Detailed implementation manners

[0041] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, 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 only used to explain the present utility model and are not used to limit the present utility model.

[0042] It should be noted that in the present utility model, terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the devices or components of the present utility model must have a specific orientation. Therefore, they should not be construed as limitations on the present utility model.

[0043] Embodiment

[0044] As Figures 1 to 6 shown, the present utility model discloses an injection mold with a front mold disengaging core-pulling structure, which includes a front mold group 100, a rear mold group 200, a mold core 300 and an arc core-pulling structure 400.

[0045] As Figure 2 shown, the front mold group 100 includes a top plate 110, a front backing plate 120, and a front template 130; the top plate 110 is fixedly connected to the front backing plate 120, and the front backing plate 120 is slidably connected to the front template 130; the front template 130 contacts the rear mold group 200; the front template 130 is provided with a front template limiting groove, and the front template limiting groove is a receiving cavity, and the opening direction of the receiving cavity faces the rear mold group 200; a core limiting groove and a slider limiting hole are opened at the bottom of the front template limiting groove, the opening direction of the core limiting groove faces the rear mold group 200, and the slider limiting hole penetrates through the core limiting groove along the mold opening direction; the front mold group 100 further includes a mold opening limiting structure, and the mold opening limiting structure includes a limiting screw chute and a limiting screw 131. One end of the limiting screw 131 extends into the limiting screw groove along the mold opening direction towards the front backing plate 120, penetrates through the front template 130, and is fixedly connected to the front backing plate 120; the other end of the limiting screw 131 is slidably connected to the limiting screw chute, so that the front backing plate 120 and the front template 130 are slidably connected, thereby generating relative movement, that is, contact and separation; the opening direction of the limiting screw chute faces the rear mold group 200 and contacts the rear template 240;

[0046] Specifically, the limit screw 131 includes a limiting portion and a fixing portion. The limiting portion and the fixing portion are fixedly connected and integrally formed. The outer diameter of the limiting portion is larger than that of the fixing portion. The limiting portion extends into the limit screw chute towards the front backing plate 120 along the mold opening direction and is slidably connected to the limit screw chute. The limiting portion is fixedly connected to one end of the fixing portion. The end of the fixing portion away from the limiting portion penetrates through the front template 130 along the mold opening direction and extends towards the front backing plate 120, and is fixedly connected to the front backing plate 120. When the front backing plate 120 is driven to displace along the mold opening direction away from the front template 130, the front backing plate 120 drives the fixing portion, and the fixing portion drives the limiting portion in the limit screw chute to displace along the mold opening direction away from the front template 130. When the limiting portion displaces to the end of the limit screw chute away from the rear template 240, the limiting portion is stopped, so that the displacement of the limit screw 131 in the limit screw chute stops, thereby making the displacement of the front backing plate 120 away from the front template 130 stop, and then achieving the effect of precisely adjusting the distance between the front backing plate 120 and the front template 130.

[0047] In this embodiment, the number of the limit screw grooves is four. The four limit screw grooves are grouped in pairs and symmetrically distributed on both sides of the front template limit groove along the mold opening direction.

[0048] As Figure 2 shown, the rear module 200 includes a bottom plate 210, a rear backing plate 220, square irons 230, a rear template 240 and an ejection mechanism. The rear backing plate 220 is fixed on the bottom plate 210. The square irons 230 are symmetrically fixed on the rear backing plate 220. The rear template 240 is fixed on the square irons 230, so that there is a certain space between the rear backing plate 220 and the rear template 240. The rear template 240 is provided with a rear template limit groove, and the rear template limit groove is a receiving cavity. The opening direction of the receiving cavity faces the front module 100. The ejection mechanism includes an ejection plate group 250 and ejector pins 260. The ejection plate group 250 is assembled inside the space formed by the rear backing plate 220 and the rear template 240. One end of the ejector pin 260 is fixed on the ejection plate group 250, and the other end passes through the rear template 240 and extends towards the front module 100 to the lower part of the product 500 after injection molding for ejecting and demolding.

[0049] The mold core 300 includes a front mold core 310 and a rear mold core 320.

[0050] As Figures 2 to 3As shown, the front mold core 310 is fixed in the front template limiting groove, and the open end of the front mold core 310 faces the rear module 200; the rear mold core 320 is fixed in the rear template limiting groove, and the open end of the rear mold core 320 faces the front module 100; the gap between the front mold core 310 and the rear mold core 320 is the mold core gap; the front mold core 310 further includes a core limiting hole, and the core limiting hole penetrates through the front mold core 310 along the mold opening direction; the core limiting hole contacts the opening direction of the core limiting groove, and the inner diameter dimension of the core limiting hole is adapted to the inner diameter dimension of the opening direction of the core limiting groove, forming a core accommodating cavity, and the opening direction of the core accommodating cavity faces the rear module 200; it should be noted that: the core limiting hole is communicated with the slider limiting hole, and one inner wall of the core limiting hole is arc-shaped along the mold opening direction.

[0051] As Figures 4 to 6 shown, the arc core-pulling structure 400 includes a slider 410 and a core 420. The slider 410 is fixedly connected to the front backing plate 120. The core 420 is rotatably assembled in the core accommodating cavity. One end of the core 420 close to the front template 130 is slidably connected to one end of the slider 410 away from the front backing plate 120. One end of the core 420 away from the front template 130 passes through the core limiting hole and extends towards the rear mold core 320. There is a gap between the core 420 and the rear mold core 320.

[0052] Specifically: As Figure 4 shown, the core 420 includes a core chute, a positioning hole, a rotating shaft 421 and a core clamping groove. The core chute is opened on the surface of the core 420 facing the front template 130 along the y-axis direction, and the opening direction of the core chute faces the front template 130; the core chute is a chute with an "L" shape in the cross-section along the y-axis direction.

[0053] The positioning hole includes a first positioning hole and a second positioning hole. The first positioning hole and the second positioning hole penetrate through the two side walls of the core chute symmetrically distributed along the z-axis along the x-axis direction respectively, and the axes of the first positioning hole and the second positioning hole are on a straight line.

[0054] The rotating shaft 421 is arranged along the z-axis on the side away from the positioning hole; the rotating shaft 421 penetrates through the core 420 along the x-axis direction, and both ends of the rotating shaft 421 are rotatably connected to the front mold core 310 respectively, so that the core 420 can rotate in the core accommodating cavity with the axis of the rotating shaft 421 as the center.

[0055] The core card slot is opened along the x-axis direction on the outer surface of the core 420 away from the front template 130, and the opening direction of the core card slot is along the z-axis away from the core slide groove. The core card slot contacts the product 500 and is clamped with the product 500; the core card slot is a groove with a rectangular cross-section along the x-axis direction; wherein: the protrusion of the front mold core 310 is inserted into the core card slot and encloses a hook-shaped cavity with the core 420; the cavity, the mold core gap, and the gap between the core 420 and the rear mold core 320 are interconnected to form the product molding cavity, and the cavity is the hook portion of the product molding cavity.

[0056] The outer surface of one side of the core 420 close to the arc-shaped inner wall of the core limiting hole has an arc-shaped cross-section along the mold opening direction and is adapted to the arc-shaped inner wall of the core limiting hole, so that the core 420 can rotate more smoothly in the core accommodating cavity.

[0057] like Figure 2 Said slider 410 has one end fixedly connected to the front pad 120 , and the slider 410 has one end away from the front pad 120 , passes through the slider limiting hole and extends into the core chute, and is slidably connected to the core 420 ;

[0058] like Figures 4 to 6 As shown, a positioning shaft limiting hole is opened at one end of the slider 410 away from the front pad 120, and the positioning shaft limiting hole passes through the slider 410 along the x-axis direction; the positioning shaft limiting hole is a through hole with a rectangular cross-section along the y-axis direction and semicircular ends;

[0059] The positioning shaft 422 extends into the first positioning hole along the x-axis direction, passes through the positioning shaft limiting hole, extends toward the second positioning hole, and extends into the second positioning hole, so that the positioning shaft 422 can move relative to the positioning shaft limiting hole, thereby realizing the relative sliding connection between the slider 410 and the core 420;

[0060] like Figures 5 to 6 As shown, when the front pad 120 is driven, the front pad 120 drives the slider 410 to move along the mold opening direction away from the rear mold 200, and the positioning shaft limit hole drives the positioning shaft 422 to move from a1 to a2 along the z-axis direction in the positioning shaft limit hole; the positioning shaft 422 drives the core 420 to rotate with the axis of the rotating shaft 421 as the center of the circle, so that the core slot is displaced in the direction away from the product 500; when the positioning shaft 422 is displaced from a1 to a2, the displacement of the positioning shaft 422 in the positioning shaft limit hole ends, so that the rotation of the core 420 ends, thereby causing the core slot to detach from the product 500.

[0061] In summary, if Figures 1 to 7 As shown, the demoulding steps of the product 500 of the injection mold with the front mold separation core pulling structure are as follows:

[0062] Step 1: Core pulling:

[0063] When the mold is completed and needs to be opened and core pulled, the front top plate 110 and the front pad 120 are driven to move in the mold opening direction away from the front template 130, and the front pad 120 drives the limit screw 131 in the limit screw slot to move in the mold opening direction away from the front template 130; at the same time, the front pad 120 drives the slider 410 to move in the mold opening direction away from the rear module 200, and the positioning shaft limiting hole drives the positioning shaft 422 to move from a1 to a2 along the z-axis direction in the positioning shaft limiting hole; the positioning shaft 422 drives the core 420 to rotate with the axis of the rotating shaft 421 as the center, so that the core slot moves in the direction away from the product 500;

[0064] When the limiting portion of the limiting screw 131 moves to the end of the limiting screw slot away from the rear template 240, the limiting portion is stuck, so that the limiting screw 131 stops moving in the limiting screw slot, thereby causing the front pad 120 to stop moving in the direction away from the front template 130. At this time, the positioning shaft 422 moves from a1 to a2, and the displacement of the positioning shaft 422 in the positioning shaft limiting hole ends, so that the rotation of the core 420 ends, and then the core 420 is completely separated from the product 500, thereby completing the core pulling work.

[0065] Step 2: Mold opening:

[0066] When the core pulling work is completed and the mold needs to be opened, the front template 130 continues to be driven and moves away from the rear mold core 320. The front template 130 drives the front mold core 310 away from the rear mold core 320 to perform mold opening displacement.

[0067] Step 3: Ejection:

[0068] The ejector plate assembly 250 is driven to move toward the front mold core 310 along the mold opening direction within the space formed by the rear pad 220 and the rear mold plate 240. The ejector plate assembly 250 drives the ejector pin 260 to eject toward the front mold core 310, thereby ejecting the product 500 toward the front mold core 310, and achieving complete separation of the product 500 from the rear mold core 320.

[0069] As described above, it is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. An injection mold with a front mold detachable core pulling structure, comprising a front mold assembly, a rear mold assembly, and a mold core, wherein the front mold assembly comprises a front backing plate and a front mold plate, the front backing plate being slidably connected to the front mold plate; the mold core has a product molding cavity therein, and the mold core comprises a front mold core and a rear mold core, characterized in that: It also includes a circular arc core pulling structure, which includes a slider and a core, wherein: The core passes through the front mold core, and there is a gap between the core and the rear mold core; The slider is fixedly connected to the front pad and is connected and linked to the core via a positioning shaft; The slider is driven by the front pad and drives the core to rotate in the mold core through the positioning shaft to be disengaged and separated from the product in the product molding cavity.

2. The injection mold with a front mold separation core pulling structure according to claim 1, characterized in that: The core is rotatably connected to the rear mold core.

3. The injection mold with a front mold separation core pulling structure according to claim 2, characterized in that: The core has a rotating shaft and is rotatably connected to the rear mold core via the rotating shaft.

4. The injection mold with a front mold separation core pulling structure according to claim 1, characterized in that: The core is provided with a core chute, and the core chute is a groove with an "L" shape in cross section; One end of the sliding block extends into the core sliding groove and is connected to the core through the positioning shaft.

5. The injection mold with a front mold separation core pulling structure according to claim 1 or 4, characterized in that: The core is provided with a core slot, and the core slot is a groove; There is a core gap between the front mold core and the rear mold core, and the protrusion of the front mold core is inserted into the core slot and encloses a hook-shaped cavity with the core; The cavity, the mold core gap, and the gap between the core and the rear mold core are interconnected to form the product molding cavity, and the cavity is the hook portion of the product molding cavity.

6. The injection mold with a front mold separation core pulling structure according to claim 5, characterized in that: A positioning shaft limiting hole is defined at one end of the slider, and the positioning shaft passes through the positioning shaft limiting hole and is fixedly connected to the front mold core; The driven slider drives the core to move in a linkage manner within the maximum aperture range of the positioning shaft limiting hole.

7. The injection mold with a front mold separation core pulling structure according to claim 5, characterized in that: The positioning shaft limiting hole is a bar-shaped through hole.

8. The injection mold with a front mold separation and core pulling structure according to claim 1, characterized in that: It also includes a mold opening limiting structure, which includes a limiting screw and a limiting screw slot, wherein: One end of the limit screw is slidably connected to the limit screw sliding groove, and the other end of the limit screw passes through the front template and is fixedly connected to the front pad; The limiting screw extends into the limiting screw slot to limit the opening and closing displacement distance between the front pad and the front template.

9. The injection mold with a front mold separation core pulling structure according to claim 8, characterized in that: The limiting screw includes a limiting portion and a fixing portion, and the limiting portion and the fixing portion are fixedly connected and integrally formed.

10. The injection mold with a front mold separation and core pulling structure according to claim 9, characterized in that: The outer diameter of the limiting portion is larger than the outer diameter of the fixing portion.

Images