Automatic sprue pulling structure of upper and lower sliders of injection mold

Abstract

The utility model relates to injection mold technical field, concretely discloses a kind of automatic gate structure of pulling and cutting of injection mold upper and lower layer sliding block, a kind of automatic gate structure of pulling and cutting of injection mold upper and lower layer sliding block, including fixed mould, movable mould, upper layer sliding block (1), lower layer sliding block (2), round inclined guide pillar (3), square inclined guide pillar (4), baffle one (5), baffle two (6), gate (7), batten one (8) and batten two (9), design science, safe and reliable in use, product gate position shearing is even, gate is designed in product non-appearance position, avoid product feature mounting hole simultaneously, also satisfy the gate position design of the mould flow definition requirement, do not occur with opponent piece assembly interference problem, product important appearance dissolution line and gate pinch line will not be affected, product quality is good, saves the cost of trimming gate and quality inspection.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an automatic gate-cutting structure for upper and lower sliders of injection molds. Background Technology

[0002] For injection molds, one of the conventional gate types is the slider core-pulling structure. This structure, whether slider or angled ejector, has several drawbacks: First, it requires secondary manual or tooling trimming, increasing trimming costs. Second, trimming can result in over- or under-trimming, leading to uneven trimming, which is unacceptable to customers for products with high appearance requirements. Third, the gate location is defined based on the initial mold flow analysis, and some gates need to avoid features such as product mounting holes, otherwise appearance defects are likely to occur, which is a technical challenge for conventional core-pulling gates. Summary of the Invention

[0003] The purpose of this utility model is to provide an automatic gate-cutting structure for upper and lower sliders of injection molds, thereby addressing the problems encountered in the existing technology.

[0004] The technical solution adopted in this utility model is as follows:

[0005] The system includes a fixed mold, a moving mold, an upper slider, a lower slider, a circular inclined guide post, a square inclined guide post, a stop block one, a stop block two, a gate, a pressure strip one, and a pressure strip two. The pressure strip two is fixed to the moving mold. The lower slider has a guide hole corresponding to the square inclined guide post and a step, and is slidably installed in the pressure strip two, so that the pressure strip two presses on the step of the lower slider. The pressure strip one is fixed to the lower slider. The upper slider has a guide hole corresponding to the circular inclined guide post and a step, and is slidably installed in the pressure strip one, so that the pressure strip one presses on the step of the upper slider. The circular inclined guide post is movably installed in the guide hole of the upper slider, and its upper end is connected to the fixed mold. The lower section of the square inclined guide post is an inclined post, and the upper section is a straight post. It is movably installed in the guide hole of the lower slider, and its upper end is connected to the fixed mold. The stop block one is fixed to the lower slider, the stop block two is fixed to the moving mold, and the gate is located on the upper slider.

[0006] This utility model relates to an automatic gate-cutting structure for upper and lower sliders in injection molds. Its scientific design ensures safe and reliable operation, resulting in uniform gate shearing. The gate is positioned in a non-visual location, avoiding feature mounting holes while still meeting the gate location requirements defined by the mold flow definition. It avoids interference with component assembly, does not affect important surface features such as melt lines and gate clamping lines, and produces high-quality products while saving on gate trimming and quality inspection costs. Attached Figure Description

[0007] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0008] Figure 1 This is a three-dimensional schematic diagram of the automatic gate cutting structure of the upper and lower sliders of the injection mold of this utility model;

[0009] Figure 2 This is a schematic diagram of the lower slider of this utility model;

[0010] Figure 3 This is a schematic diagram of the upper slider of this utility model;

[0011] Figure 4 This is a top view of the present invention;

[0012] Figure 5 for Figure 4 A schematic diagram of the stepped section along the AA direction;

[0013] In the diagram: 1-Upper slider; 2-Lower slider; 3-Circular inclined guide post; 4-Square inclined guide post; 4a-Straight post; 4b-Inclined post; 5-Stop block one; 6-Stop block two; 7-Gate; 8-Pressure bar one; 9-Pressure bar two; 10-Product. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described below are merely illustrative of this utility model. Key terms used in these descriptions, including "circular inclined guide post," "square inclined guide post," "straight post," and "inclined post," are simply customary names and are used for ease of description and simplification; therefore, they should not be construed as limitations on this utility model.

[0015] This utility model relates to an automatic gate-cutting structure for upper and lower sliders in injection molds, such as... Figure 1-3As shown, the system includes a fixed mold, a moving mold, an upper slider 1, a lower slider 2, a circular inclined guide post 3, a square inclined guide post 4, a stop block 1 5, a stop block 2 6, a gate 7, a pressure strip 1 8, and a pressure strip 2 9. The pressure strip 2 9 is fixed to the moving mold. The lower slider 2 has guide holes corresponding to the square inclined guide post 4 and also has steps. The steps of the lower slider 2 are slidably installed in the pressure strip 2 9, so that the pressure strip 2 9 presses against the steps of the lower slider 2. The pressure strip 1 8 is fixed to the lower slider 2. The upper slider 1 has guide holes corresponding to the circular inclined guide post 4. The guide hole of column 3 is also provided with a step, and is slidably installed in pressure strip 8, so that pressure strip 8 presses on the step of upper slider 1. The circular inclined guide column 3 is movably installed in the guide hole of upper slider 1, and its upper end is connected to the fixed mold. The lower section of the square inclined guide column 4 is set as an inclined column 4b, and the upper section is set as a straight column 4a. It is movably installed in the guide hole of lower slider 2, and its upper end is connected to the fixed mold. The first stop block 5 is fixed on lower slider 2, the second stop block 6 is fixed on moving mold, and the gate 7 is provided on upper slider 1 and connected to product 10.

[0016] like Figure 4-5 As shown, during the mold opening process, in the first stage, the fixed square inclined mold moves upward relative to the moving mold in the direction shown in the figure, causing the circular inclined guide post 3 to also push the upper slider 1 upward as shown in the figure. Figure 5 The mold moves to the left in the direction shown until the stop block 5 assists in limiting and positioning the upper slider 1, performing demolding and core pulling. Since the upper section of the square inclined guide pillar 4 is a straight pillar 4a, the lower slider 2 does not move. Because the tunnel gate 7 is on the upper slider 1, when the upper slider 1 moves first, it automatically pulls and cuts the gate portion of the product 10 flush. In the second stage, the fixed mold continues to move upward relative to the moving mold in the direction shown in the figure. Only then does the inclined pillar 4b of the square inclined guide pillar 4 pass through the guide hole of the lower slider 2, pushing the lower slider 2 to move until the stop block 6 assists in limiting and positioning the lower slider 2, finally completing the entire demolding and core pulling process. Firstly, it saves the gate trimming process steps, and the gate position is cut evenly. Secondly, the gate design is in a non-appearance location on the product, avoiding the product's feature mounting holes, and also meets the gate position design requirements of the mold flow definition. It avoids interference with the assembly of the hand parts and does not affect the important appearance melt lines and gate clamping lines of the product, making the product appearance more acceptable to customers. Later on, there is no need to worry about the instability of manual trimming of the gate residue, reducing repeated trimming and quality inspection processes, and saving production costs.

[0017] The above description is only a general embodiment of this utility model. For those skilled in the art, there are various other embodiments with modifications and variations, which will not be elaborated here. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model are included within the protection scope claimed by this utility model.

Claims

1. An automatic ejection gate structure of an upper and lower slide of an injection mold, characterized in that, It includes fixed mould, movable mould, upper slide (1), lower slide (2), circular inclined guide pillar (3), square inclined guide pillar (4), stop block one (5), stop block two (6), gate (7), press bar one (8) and press bar two (9), the press bar two (9) is fixed on the movable mould, the lower slide (2) is provided with guide hole corresponding to the square inclined guide pillar (4), and is also provided with step, is slidably installed in the press bar two (9), so that the press bar two (9) is pressed on the step of the lower slide (2), the press bar one (8) is fixed on the lower slide (2), the upper slide (1) is provided with guide hole corresponding to the circular inclined guide pillar (3), and is also provided with step, is slidably installed in the press bar one (8), so that the press bar one (8) is pressed on the step of the upper slide (1), the circular inclined guide pillar (3) is movably installed in the guide hole of the upper slide (1), and the upper end is connected to the fixed mould, the square inclined guide pillar (4) is provided with inclined column (4b) in the lower section, is provided with straight column (4a) in the upper section, is movably installed in the guide hole of the lower slide (2), and the upper end is connected to the fixed mould, the stop block one (5) is fixed on the lower slide (2), the stop block two (6) is fixed on the movable mould, and the gate (7) is arranged on the upper slide (1).

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