Secondary telescopic mechanism for plastic mold

Abstract

The utility model belongs to the technical field of plastic molds, and particularly relates to a secondary telescopic mechanism for a plastic mold, which comprises a pressing plate and a central mechanism, the pressing plate comprises an upper pressing plate group and a lower pressing plate group, and the central mechanism comprises a first central mechanism and a second central mechanism; a first sliding block penetrates through the interior of the upper pressing plate set, a first guide block is connected to the bottom side of the first sliding block, a second guide groove is formed in the inner wall of the first sliding block, the first center buckle is connected to the inner wall of a second sliding block in a clamped mode, and a second center buckle is connected to the surface of the first center buckle. According to the utility model, firstly, the cross connecting block drives the first center to retreat by a certain distance, so that the second sliding block firstly retreats from the buckling stroke of the product; then the first center bolt and the second sliding block continue to retreat backwards for a certain stroke together, so that the second sliding block reaches the clearance position of the first sliding block; and finally, the second center retreats by a certain distance, so that the first sliding block retreats from the buckling stroke of the product, and all retraction actions are completed, so that the product is smoothly taken out.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic moulds, and in particular relates to a secondary telescopic mechanism for plastic moulds. Background Art

[0002] Plastic mold is the abbreviation of a combined mold used for compression molding, extrusion molding, injection molding, blow molding and low-foaming molding. The coordinated changes of the mold convex and concave molds and the auxiliary molding system can process a series of plastic parts of different shapes and sizes;

[0003] The telescopic shell of plastic mold is a good innovative solution to the difficult demoulding problems such as threads or undercuts, especially the bosses that are difficult to solve with very long threads.

[0004] After searching, the "a telescopic cage mechanism and an injection mold" disclosed in the application number "CN202020316271.9" belongs to the same technical field as the present technical solution. The telescopic cage mechanism and the injection mold of the utility model are arranged by setting a telescopic cage mechanism including a telescopic cage and a power mechanism. The power mechanism is a hydraulic power mechanism based on a power cylinder, which drives the telescopic cage to perform telescopic movement to realize product molding and demolding, thereby solving the technical problem in the prior art that when setting the telescopic cage, a linkage module needs to be set accordingly, which increases the cost and difficulty of modification.

[0005] However, due to the particularity of the structure of the existing telescopic bracket structure of the plastic mold, when the telescopic bracket stroke is opened to a certain distance, the top of the slider will interfere, thereby limiting the buckling stroke of the product and affecting the manufacturability of the product. Utility Model Content

[0006] The utility model aims to provide a secondary telescopic mechanism for a plastic mold, aiming to solve the problem that the current plastic mold telescopic structure proposed in the prior art, due to the particularity of the structure, when the telescopic stroke is opened to a certain distance, the top of the slider will interfere, thereby limiting the buckling stroke of the product and affecting the producibility of the product.

[0007] To achieve the above object, the utility model provides the following technical solutions: a secondary telescopic mechanism for a plastic mold, comprising a pressing plate and a center plate, wherein the pressing plate comprises an upper pressing plate group and a lower pressing plate group, and the center plate comprises a first center plate and a second center plate;

[0008] A first slider passes through the interior of the upper pressure plate group, a first guide block is connected to the bottom side of the first slider, a second guide groove is provided on the inner wall of the first slider, the first center joint is connected to the inner wall of the second slider, the surface of the first center joint is connected to the second center joint, a cross connection block is provided on the bottom side of the first center joint, and a third fixing bolt passes through the first center joint and the inside of the cross connection block.

[0009] As a preferred secondary telescopic mechanism for a plastic mold of the utility model, the upper pressure plate group includes a first pressure plate, a second pressure plate, a third pressure plate, a first fixing bolt and a first guide groove, the second pressure plate is arranged on the bottom side of the first pressure plate, the third pressure plate is arranged on the bottom side of the second pressure plate, the first fixing bolt passes through the first pressure plate, the second pressure plate and the third pressure plate, and the surface of the third pressure plate is provided with a first guide groove.

[0010] As a preferred secondary telescopic mechanism for a plastic mold of the utility model, the lower pressure plate group includes a fourth pressure plate, a fifth pressure plate, a sixth pressure plate and a second fixing bolt, the fifth pressure plate is arranged on the bottom side of the fourth pressure plate, the sixth pressure plate is arranged on the bottom side of the fifth pressure plate, the second fixing bolt passes through the fourth pressure plate, the fifth pressure plate and the sixth pressure plate, and the second slider passes through the inside of the fourth pressure plate and the fifth pressure plate.

[0011] As a preferred embodiment of the secondary telescopic mechanism for a plastic mold of the utility model, the first guide block is slidably connected with the first fixing bolt through the first guide groove.

[0012] As a preferred embodiment of the secondary telescopic mechanism for a plastic mold of the utility model, the second sliding block is slidably connected to the first center block.

[0013] As a preferred embodiment of the secondary telescopic mechanism for a plastic mold of the utility model, the first sliding block is slidably connected to the second center block via the second guide groove.

[0014] As a preferred embodiment of the secondary telescopic mechanism for a plastic mold of the utility model, the second center joint is slidably connected to the first center joint.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] According to the utility model, during the first contraction, the cross connection block drives the first center block to retreat to a certain distance, at which time the second slider slides relatively with the first center block and gathers toward the center position, at which time the second slider first withdraws from the buckling stroke of the product, and in this process the positions of the second center block and the first slider are kept stationary; when the first contraction is completed, the first center block and the second slider continue to retreat backwards for a certain stroke together, so that the second slider reaches the avoidance position of the first slider; during the second contraction, the second center block retreats to a certain distance, so that the first slider withdraws from the buckling stroke of the product, thereby completing all the contraction actions and allowing the product to be taken out smoothly. This secondary contraction mechanism optimizes the traditional contraction mechanism, so that when the product is at the same height, the secondary contraction has a larger buckling stroke of the product than the primary contraction, thereby increasing the product producibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is an exploded view of the upper pressure plate group structure of the utility model;

[0020] Figure 3 This is an exploded view of the lower pressure plate group structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the first sliding block and the upper pressing plate group of the utility model;

[0022] Figure 5 This is a cross-sectional view of the connection structure between the second sliding block and the lower pressing plate of the utility model;

[0023] Figure 6 This is a schematic diagram of the connection structure between the second slider and the first center slider of the utility model;

[0024] Figure 7 This is a schematic diagram of the connection structure between the first center bracket and the second center bracket of the utility model;

[0025] Figure 8 This is a schematic diagram of the first slider and the second center structure of the utility model;

[0026] Fig. 9 This is an exploded view of the connection structure between the first center block and the cross connection block of the utility model;

[0027] Fig.10 This is a schematic diagram of the structure of the first slider of the utility model;

[0028] Fig.11 This is a schematic diagram of the original structure of the first reduction of the utility model;

[0029] Fig.12 This is a schematic diagram of the structure of the utility model after the first contraction;

[0030] Fig.13 It is a schematic diagram of the second shrink structure of the utility model.

[0031] In the figure: 1. upper pressure plate group; 101. first pressure plate; 102. second pressure plate; 103. third pressure plate; 104. first fixing bolt; 105. first guide groove; 2. lower pressure plate group; 201. fourth pressure plate; 202. fifth pressure plate; 203. sixth pressure plate; 204. second fixing bolt; 3. first slider; 4. first guide block; 5. second guide groove; 6. second slider; 7. first center block; 8. second center block; 9. cross connection block; 10. third fixing bolt. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-Figure 10 The utility model provides the following technical solutions: a secondary telescopic bracket mechanism for a plastic mold, comprising a pressure plate and a center bracket, the pressure plate comprising an upper pressure plate group 1 and a lower pressure plate group 2, the center bracket comprising a first center bracket 7 and a second center bracket 8; a first slider 3 is penetrated inside the upper pressure plate group 1, a first guide block 4 is connected to the bottom side of the first slider 3, a second guide groove 5 is provided on the inner wall of the first slider 3, the first center bracket 7 is clamped on the inner wall of the second slider 6, the surface of the first center bracket 7 is connected to the second center bracket 8, a cross connecting block 9 is provided on the bottom side of the first center bracket 7, and a third fixing bolt 10 is penetrated inside the first center bracket 7 and the cross connecting block 9.

[0034] Preferably: the upper pressure plate group 1 includes a first pressure plate 101, a second pressure plate 102, a third pressure plate 103, a first fixing bolt 104 and a first guide groove 105. The second pressure plate 102 is arranged on the bottom side of the first pressure plate 101, and the third pressure plate 103 is arranged on the bottom side of the second pressure plate 102. The first fixing bolt 104 penetrates the first pressure plate 101, the second pressure plate 102 and the third pressure plate 103, and the first guide groove 105 is opened on the surface of the third pressure plate 103.

[0035] During specific use, the first fixing bolt 104 penetrates the first pressing plate 101 , the second pressing plate 102 and the third pressing plate 103 , so that the first pressing plate 101 , the second pressing plate 102 and the third pressing plate 103 can be connected as a whole.

[0036] Preferably: the lower pressure plate group 2 includes a fourth pressure plate 201, a fifth pressure plate 202, a sixth pressure plate 203 and a second fixing bolt 204, the fifth pressure plate 202 is arranged on the bottom side of the fourth pressure plate 201, the sixth pressure plate 203 is arranged on the bottom side of the fifth pressure plate 202, the second fixing bolt 204 passes through the fourth pressure plate 201, the fifth pressure plate 202 and the sixth pressure plate 203, and the second slider 6 passes through the interior of the fourth pressure plate 201 and the fifth pressure plate 202.

[0037] During specific use, the second fixing bolt 204 penetrates the fourth pressing plate 201 , the fifth pressing plate 202 and the sixth pressing plate 203 , so that the fourth pressing plate 201 , the fifth pressing plate 202 and the sixth pressing plate 203 can be connected as a whole.

[0038] Preferably, the first guide block 4 is slidably connected to the first fixing bolt 104 via the first guide groove 105 .

[0039] During specific use, the first slider 3 can be limited by the second pressure plate 102 to prevent the first slider 3 from moving in a direction perpendicular to the third pressure plate 103, and by setting the first guide block 4 and the first guide groove 105, the first slider 3 can slide in a direction parallel to the third pressure plate 103.

[0040] Preferably, the second slider 6 and the first center bracket 7 are connected in a sliding manner.

[0041] During specific use, under the limitation of the fourth pressing plate 201, the first center slider 7 can generate a pulling force on the second slider 6 when sliding under the force, and the second slider 6 can gather to the center position under the pulling force.

[0042] Preferably, the first sliding block 3 is slidably connected to the second center joint 8 via the second guide groove 5 .

[0043] During specific use, under the action of the second guide groove 5 and the protrusion on the surface of the second center support 8, the second center support 8 can generate a pulling force on the first sliding block 3 when retreating.

[0044] Preferably, the second center joint 8 and the first center joint 7 are connected by sliding.

[0045] Working Principle: When using the secondary telescopic mechanism for the plastic mold, the secondary telescopic mechanism is mainly divided into four steps to complete the motion structure:

[0046] (a) mold clamping state (such as Figure 1 shown);

[0047] (ii) The first shrinkage Fig.11 shown);

[0048] When the collar is retracted for the first time, the first center collar 7 is driven to retreat to a certain distance through the cross connecting block 9. At this time, the second slider 6 slides relative to the first center collar 7, and the second slider 6 gathers toward the center position. At this time, the second slider 6 first withdraws from the buckling stroke of the product. During this process, the positions of the second center collar 8 and the first slider 3 are kept stationary.

[0049] (iii) The second slide block (6) continues to be ejected (eg Fig.12 shown);

[0050] When the first contraction is completed, the first center block 7 and the second slider 6 continue to retreat a certain distance, so that the second slider 6 reaches the clearance position of the first slider 3, so that there is no interference in the movement between the first slider 3 and the second slider 6.

[0051] (IV) Second contraction (such as Fig.13 shown);

[0052] During the second retraction, the second center lock 8 retreats to a certain distance. Under the action of the second guide groove 5 and the protrusion on the surface of the second center lock 8, the second center lock 8 can generate a pulling force on the first slider 3 when retreating. The first slider 3 is subjected to the pulling force and can drive the first guide block 4 to slide inside the first guide groove 105, so that the first slider 3 can be gathered, so that the first slider 3 withdraws from the buckling stroke of the product, thereby completing all the retraction actions and allowing the product to be smoothly taken out.

[0053] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A secondary telescopic mechanism for a plastic mold, comprising a pressing plate and a center lever, characterized in that: The pressing plate comprises an upper pressing plate group (1) and a lower pressing plate group (2), and the center cone comprises a first center cone (7) and a second center cone (8); The upper pressure plate group (1) has a first slider (3) running through it, the bottom side of the first slider (3) is connected to a first guide block (4), the inner wall of the first slider (3) is provided with a second guide groove (5), the first center joint (7) is clamped to the inner wall of the second slider (6), the surface of the first center joint (7) is connected to a second center joint (8), the bottom side of the first center joint (7) is provided with a cross connection block (9), and the first center joint (7) and the cross connection block (9) are penetrated by a third fixing bolt (10).

2. The secondary telescopic mechanism for a plastic mold according to claim 1, characterized in that: The upper pressure plate group (1) includes a first pressure plate (101), a second pressure plate (102), a third pressure plate (103), a first fixing bolt (104) and a first guide groove (105); the second pressure plate (102) is arranged on the bottom side of the first pressure plate (101); the third pressure plate (103) is arranged on the bottom side of the second pressure plate (102); the first fixing bolt (104) penetrates the first pressure plate (101), the second pressure plate (102) and the third pressure plate (103); and the first guide groove (105) is opened on the surface of the third pressure plate (103).

3. The secondary telescopic mechanism for a plastic mold according to claim 1, characterized in that: The lower pressure plate group (2) includes a fourth pressure plate (201), a fifth pressure plate (202), a sixth pressure plate (203) and a second fixing bolt (204); the fifth pressure plate (202) is arranged on the bottom side of the fourth pressure plate (201); the sixth pressure plate (203) is arranged on the bottom side of the fifth pressure plate (202); the second fixing bolt (204) passes through the fourth pressure plate (201), the fifth pressure plate (202) and the sixth pressure plate (203); the second slider (6) passes through the inside of the fourth pressure plate (201) and the fifth pressure plate (202).

4. The secondary telescopic mechanism for a plastic mold according to claim 2, characterized in that: The first guide block (4) is slidably connected to the first fixing bolt (104) via the first guide groove (105).

5. The secondary telescopic mechanism for a plastic mold according to claim 1, characterized in that: The second sliding block (6) is slidably connected to the first center block (7).

6. The secondary telescopic mechanism for a plastic mold according to claim 1, characterized in that: The first sliding block (3) is slidably connected to the second center block (8) via the second guide groove (5).

7. The secondary telescopic mechanism for a plastic mold according to claim 1, characterized in that: The second center joint (8) is slidably connected to the first center joint (7).

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