Injection mold and core pulling structure thereof

Abstract

The utility model discloses an injection mold and a core-pulling structure thereof, the injection mold comprises a first fixed plate fixed on a floating mold plate, a first insert and a second insert, the first insert and the second insert are used for core pulling, the first insert is fixed on the first fixed plate, a second fixed plate is arranged between the first fixed plate and a movable mold plate, and the second insert is fixed on the second fixed plate. The first insert penetrates through the second fixing plate in a clearance mode, the second fixing plate is fixedly provided with a connecting piece and a limiting piece, during parting, the first insert and the first fixing plate move downwards along with the floating mold plate, the second insert and the second fixing plate are kept still initially, and core pulling of the first insert is completed after the first insert moves downwards by a certain distance. And the first fixing plate abuts against the connecting piece to drive the second fixing plate to move downwards until the limiting piece abuts against the movable mold plate, so that core pulling of the second insert is completed, and core pulling of multiple strokes is completed on the premise of one-time mold parting.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold and a core-pulling structure thereof. Background Art

[0002] Generally, the core-pulling structure of an injection mold is directly fixed and assembled on the movable mold plate, and the core can only be pulled once in one parting. If there are multiple inserts that need to be core-pulled, multiple partings are required to achieve the core-pulling of each insert in turn. Such a core-pulling structure is complex and the operation is cumbersome. Utility Model Content

[0003] Therefore, in order to solve the above problems, the present invention provides an injection mold and a core pulling structure thereof, which can realize core pulling of multiple strokes under the premise of one mold parting.

[0004] To achieve the above purpose, the technical solutions provided by the present invention are as follows:

[0005] The utility model provides a core-pulling structure of an injection mold, comprising a first fixed plate fixed to a floating template of the injection mold and a first insert and a second insert for core pulling; the first insert is fixed to the first fixed plate, a second fixed plate is provided between the first fixed plate and the movable template of the injection mold, the second insert is fixed to the second fixed plate, and the first insert is provided through the second fixed plate with a gap; the second fixed plate is respectively fixed with a connecting piece and a limiting piece, the first fixed plate is provided with a first clearance through hole that matches the connecting piece, and the connecting piece A gap is set through the first giveway through hole, and an abutting end is formed that can abut on the hole wall of the first giveway through hole close to the floating template, and the abutting end and the hole wall of the first giveway through hole close to the floating template are set at a distance; the movable template is provided with a second giveway through hole that cooperates with the limiting member, and the limiting member is set through the second giveway through hole with a gap, and a limiting end is formed that can abut on the hole wall of the second giveway through hole away from the second fixed plate, and the limiting end and the hole wall of the second giveway through hole away from the second fixed plate are set at a distance.

[0006] Furthermore, a first abutting groove matching the abutting end is formed on a hole wall of the first displacement through hole close to the floating template, so that the abutting end can abut against the groove wall of the first abutting groove.

[0007] Furthermore, a clearance groove communicating with the first clearance through hole is provided on a side of the floating template facing the first fixed plate.

[0008] Further, the second displacement through hole is provided with a second abutting groove matched with the limiting end, so that the limiting end can abut on the groove wall of the second abutting groove.

[0009] Further, the movable mold plate is fixedly provided with a guide rod which is slidably arranged through the first fixed plate and the second fixed plate to guide the movement of the first fixed plate and the second fixed plate.

[0010] Further, the first insert and / or the second insert is a spade base, and the movable mold plate is provided with a bevel slider matched with the spade base, the spade base has a first bevel, and the bevel slider has a second bevel; the first bevel is slidably connected to the second bevel to form a side core-pulling arrangement.

[0011] The utility model provides a kind of injection mold, at least comprising the core-pulling structure of above-mentioned injection mold.

[0012] The technical scheme provided by the utility model has the following beneficial effects:

[0013] The first fixed plate, the second fixed plate, the connecting piece and the limiting piece are cooperated, and when the injection mold is parted, the first insert and the first fixed plate are moved downward together with the floating mold plate, the second insert and the second fixed plate are kept stationary initially, after the first insert is moved downward by a certain distance and the core-pulling of the first insert is completed, the first fixed plate abuts the abutting end of the connecting piece, and then the second fixed plate fixed on the connecting piece is driven to move downward, until the limiting end of the limiting piece on the second fixed plate abuts the movable mold plate, to complete the core-pulling of the second insert, so that the core-pulling of multiple strokes can be completed under the premise of one-time mold parting. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the appearance view of the core-pulling structure of injection mold in embodiment one, as shown in the figure;

[0015] Figure 2 It is the first position sectional view of the core-pulling structure of injection mold in embodiment one, as shown in the figure;

[0016] Figure 3 It is the second position sectional view of the core-pulling structure of injection mold in embodiment one, as shown in the figure;

[0017] Figure 4 It is the third position sectional view of the core-pulling structure of injection mold in embodiment one, as shown in the figure; Figure 3 It is the enlarged schematic view of area A in the figure;

[0018] Figure 5 It is the third position sectional view of the core-pulling structure of injection mold in embodiment one, as shown in the figure;

[0019] Figure 6 Shown Figure 5 Enlarged schematic diagram of area B in the middle;

[0020] Figure 7 The figure shows a cross-sectional view of the core-pulling structure of the injection mold equipped with an inclined slider in the second embodiment. DETAILED DESCRIPTION

[0021] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0022] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] Reference Figures 1 to 6 As shown, the first embodiment provides a core pulling structure of an injection mold (hereinafter referred to as the core pulling structure) for cooperating with multiple core pulling of the injection mold.

[0025] like Figure 2 As shown, the core pulling structure of this embodiment includes a first fixed plate 3 fixed to the floating template 5 of the injection mold and a first insert 1 and a second insert 2 for core pulling, the first insert 1 is fixed to the first fixed plate 3, a second fixed plate 4 is arranged between the first fixed plate 3 and the movable template 6 of the injection mold, the second insert 2 is fixed to the second fixed plate 4, and the first insert 1 is arranged to pass through the second fixed plate 4 with a gap.

[0026] like Figure 3 and Figure 4 As shown, the second fixed plate 4 is respectively fixed with a connecting member 8 and a limiting member 9, and the first fixed plate 3 is provided with a first clearance hole 31 that cooperates with the connecting member 8. The connecting member 8 is set to pass through the first clearance hole 31 downward with a gap to ensure that the middle part of the connecting member 8 can move in the first fixed plate 3, and form an abutment end 81 that can abut on the lower hole wall 311 of the first clearance hole 31 close to the floating template 5, and the abutment end 81 and the lower hole wall 311 of the first clearance hole 31 close to the floating template 5 are set at a distance to ensure that the first insert 1 and the first fixed plate 3 can abut the abutment end 81 of the connecting member 8 only after descending a certain distance during parting, thereby driving the connecting member 8 and the second fixed plate 4 to move downward to realize the core pulling action of the second insert 2.

[0027] like Figure 5 andFigure 6 As shown, the movable template 6 is provided with a second clearance through hole 61 that cooperates with the limiting member 9. The limiting member 9 is arranged with a gap and passes through the second clearance through hole 61 upward to ensure that the upper part of the limiting member 9 can move in the movable template 6, and forms a limiting end 91 that can abut against the upper hole wall 611 of the second clearance through hole 61 away from the second fixed plate 4, and the limiting end 91 and the second clearance through hole 61 are arranged with a distance from the upper hole wall 611 of the second fixed plate 4 to ensure that the moving stroke of the limiting end 91 of the limiting member 9 is a fixed distance, thereby preventing the core pulling abnormality caused by the core pulling stroke of the second insert 2 being too large.

[0028] In this embodiment, Figure 1 As shown, the fixed template 7 and the movable template 6 of the injection mold are arranged up and down, the first insert 1 and the second insert 2 are inserted in the mold core of the injection mold, and the floating template 5 is located on the lower side of the movable template 6.

[0029] When the mold is opened, the PL1 parting surface between the fixed template 7 and the movable template 6 is separated first. After the PL1 parting surface is opened in place, the PL2 parting surface between the movable template 6 and the floating template 5 is separated. The floating template 5, the first fixed plate 3 and the first insert 1 form a whole and are driven to move downward to complete the first core pulling, while the second insert 2 and the second fixed plate 4 are temporarily stationary.

[0030] When the first fixed plate 3 descends to the first stroke, this first stroke is the distance between the lower hole wall 311 of the first yield through hole 31 and the abutting end 81 of the connecting member 8 before parting. The first fixed plate 3 abuts the abutting end 81 of the connecting member 8 and drives the connecting member 8 to move downward. The connecting member 8 drives the second fixed plate 4 to move downward synchronously, and the second insert 2 is also driven by the second fixed plate 4 to descend accordingly until the limiting end 91 of the limiting member 9 abuts the movable template 6. The limiting member 9 is restricted by the passive template 6 and no longer moves downward. The second fixed plate 4 also stops moving at the same time. At this time, the core pulling stroke of the second insert 2 is also limited within the second stroke. At this time, the second stroke is the distance between the upper hole wall 611 and the limiting end 91 of the second yield through hole 61 before parting.

[0031] The first fixed plate 3, the second fixed plate 4, the connecting piece 8 and the limiting piece 9 cooperate with each other, and when the injection mold is parted, the first insert 1 and the first fixed plate 3 move downward together following the opening of the floating template 5. The initial second insert 2 and the second fixed plate 4 remain stationary. After the first insert 1 moves downward for a certain distance and completes the core pulling of the first insert 1, the first fixed plate 3 at this time abuts the abutting end 81 of the connecting piece 8, thereby driving the second fixed plate 4 fixed on the connecting piece 8 to move downward until the limiting end 91 of the limiting piece 9 on the second fixed plate 4 abuts the movable template 6 to complete the core pulling of the second insert 2. In this way, multiple strokes of core pulling can be completed under the premise of one mold parting.

[0032] Of course, the number of second inserts 2 can also be 1 or more than 2, and corresponding similar structures as described above can be provided to achieve multiple core pulling operations under the premise of one parting.

[0033] In another preferred embodiment, a first abutting groove is formed on the wall of the first clearance hole 31 near the floating template 5 to match the abutting end 81, so that the abutting end 81 can abut against the groove wall of the first abutting groove. Of course, in other embodiments, the floating template 5 can also be provided with an inwardly concave groove to accommodate the abutting end 81 of the connecting member 8, thereby ensuring that the abutting end 81 is spaced apart from the first fixing plate 3. In this case, the first abutting groove is not required.

[0034] Further preferably, a clearance groove connected to the first clearance through hole 31 is provided on the side of the floating template 5 facing the first fixed plate 3, and the first abutting groove and the clearance groove are connected to form a clearance cavity with a larger groove depth, so that the abutting end 81 has a larger stroke in the clearance cavity.

[0035] Further preferably, a second abutting groove matching the limiting end 91 is formed in the hole wall of the second displacement through hole 61 facing away from the second fixing plate 4 , so that the limiting end 91 can abut against the groove wall of the second abutting groove.

[0036] In another preferred embodiment, the movable template 6 is fixedly equipped with a guide rod, which can be slidably passed through the first fixed plate 3 and the second fixed plate 4 to form a guide setting for the movement of the first fixed plate 3 and the second fixed plate 4 to ensure that the movement directions of the first fixed plate 3, the second fixed plate 4, the connecting member 8 and the limit member 9 remain consistent, thereby further ensuring the stability of the first stroke and the second stroke.

[0037] Example 2

[0038] like Figure 7 As shown, embodiment 2 provides a core-pulling structure for an injection mold. The structures of embodiment 2 and embodiment 1 are substantially the same, except that: the first insert 1 is a shovel base, and a sloped slider 10 is provided in the movable template 6 to match the first insert 1. The first insert 1 has a first slope, and the sloped slider 10 has a second slope. The first slope is slidably connected to the second slope to form a side core-pulling arrangement.

[0039] When the first insert 1 moves, it drives the inclined slider 10 to move accordingly, thereby realizing side core pulling.

[0040] Of course, in other embodiments, the second insert may also be a shovel base, and be provided with an inclined slider 10 that forms a sliding connection therewith.

[0041] Example 3

[0042] The third embodiment provides an injection mold, which at least includes the core-pulling structure of the injection mold of the first embodiment or the second embodiment.

[0043] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the form and details of the present invention without departing from the spirit and scope of the present invention as defined by the appended claims, and all of these changes are within the scope of protection of the present invention.

Claims

1. A core-pulling structure for an injection mold, characterized in that: It includes a first fixed plate fixed to a floating template of an injection mold and a first insert and a second insert for core pulling; The first insert is fixed to the first fixed plate, a second fixed plate is provided between the first fixed plate and the movable plate of the injection mold, the second insert is fixed to the second fixed plate, and the first insert is provided through the second fixed plate with a gap; The second fixing plate is respectively fixed with a connecting piece and a limiting piece, the first fixing plate is provided with a first clearance through-hole that matches the connecting piece, the connecting piece is arranged to pass through the first clearance through-hole with a gap, and forms an abutting end that can abut on the hole wall of the first clearance through-hole close to the floating template, and the abutting end and the hole wall of the first clearance through-hole close to the floating template are arranged at a distance; The movable template is provided with a second clearance through hole that cooperates with the limiting member. The limiting member is arranged to pass through the second clearance through hole with a gap, and forms a limiting end that can abut against the hole wall of the second clearance through hole away from the second fixed plate, and the limiting end and the hole wall of the second clearance through hole away from the second fixed plate are arranged at a distance.

2. The core-pulling structure of the injection mold according to claim 1, characterized in that: A first abutting groove matching the abutting end is formed on a hole wall of the first displacement through hole close to the floating template, so that the abutting end can abut on the groove wall of the first abutting groove.

3. The core-pulling structure of the injection mold according to claim 2, characterized in that: A clearance groove communicating with the first clearance through hole is provided on one side of the floating template facing the first fixed plate.

4. The core-pulling structure of the injection mold according to claim 1, characterized in that: A second abutting groove matching the limiting end is formed on a hole wall of the second displacement through hole facing away from the second fixing plate, so that the limiting end can abut against the groove wall of the second abutting groove.

5. The core-pulling structure of the injection mold according to any one of claims 1 to 4, characterized in that: The movable plate is fixedly equipped with a guide rod, and the guide rod is slidably passed through the first fixed plate and the second fixed plate to form a guide setting for the movement of the first fixed plate and the second fixed plate.

6. The core-pulling structure of the injection mold according to any one of claims 1 to 4, characterized in that: The first insert and / or the second insert is a shovel base, and a sloped slider matching the shovel base is provided in the movable template, the shovel base has a first slope, and the sloped slider has a second slope; the first slope is slidably connected to the second slope to form a side core pulling setting.

7. An injection mold, characterized in that: The invention comprises at least the core-pulling structure of the injection mold according to any one of claims 1 to 6.

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