Anti-eccentricity long core-pulling mechanism for tray injection mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to an anti-eccentricity long core-pulling mechanism for a tray injection mold. The forming die comprises a forming die plate, a tray forming surface is arranged in the forming die plate, and a plurality of forming column positioning grooves are formed in the tray forming surface. In the injection molding process, molten materials are injected through the injection molding part, the tray forming surface is used for forming a tray structure, the auxiliary forming column piece is used for forming a column hole structure of a plastic piece, and the oil cylinder driving piece drives the eccentricity-preventing long core-pulling assembly to move, so that the eccentricity-preventing long core-pulling assembly abuts against the outer side of the auxiliary forming column piece for abutting; the auxiliary forming column piece is prevented from being eccentric, the oil cylinder driving piece retreats when the injection is about 3 / 4 of the certain wall thickness, the structure can prevent the auxiliary forming column piece from being eccentric in the injection molding process due to injection molding pressure in the injection molding process, and the injection molding accuracy is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to an anti-eccentric long core-pulling mechanism for a tray injection mold. Background Art

[0002] A tray is a plastic product widely used by people for carrying items in daily life and products in factories. The tray is mainly injection-molded by a tray injection mold. In the existing tray injection mold, due to the injection pressure, the insert used for forming the column hole structure of the plastic part is prone to eccentricity, which affects the injection molding accuracy. Therefore, there is an urgent need to design an anti-eccentric long core-pulling mechanism for a tray injection mold that can overcome the above defects.

[0003] In order to overcome the deficiencies of the prior art, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a plastic tray injection mold [Application No.: 201610374719.0], which includes a fixed mold and a moving mold. A insert block is provided between the fixed mold and the moving mold. The insert block includes a fork insert block assembly, and the features are as follows: the fork insert block assembly includes a slidably matched inner insert block and an outer insert block. The sliding surfaces of the inner insert block and the outer insert block are inclined surfaces. When the mold is closed, the inner insert block and the outer insert block form an arched part at the entrance of the tray slot. The inner insert block is located inside the arched part, and the outer insert block is located outside the arched part. An oil cylinder is drivingly connected to the outer insert block, and the oil cylinder drives the outer insert block to move horizontally; a demolding mechanism for obliquely pulling the inner insert block out of the mold and a pulling-out mechanism for horizontally pulling out the inner insert block are provided between the inner insert block and the outer insert block. Summary of the Invention

[0004] The purpose of the utility model is to provide an anti-eccentric long core-pulling mechanism for a tray injection mold aiming at the above problems.

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

[0006] An anti-eccentric long core-pulling mechanism for a tray injection mold includes a forming template. A tray forming surface is provided inside the forming template. A plurality of forming column positioning grooves are provided inside the tray forming surface. An auxiliary forming column part which is opposite in position and matching in shape with the forming column positioning grooves is provided below the forming template. An anti-eccentric long core-pulling component which can move along one end outside the auxiliary forming column part close to or away from is also provided below the forming template. An oil cylinder driving part for driving the anti-eccentric long core-pulling component to move is provided outside the anti-eccentric long core-pulling component. An injection part connected to the tray forming surface is provided inside the forming template.

[0007] In the above anti-eccentric long core-pulling mechanism for a tray injection mold, the anti-eccentric long core-pulling assembly includes an anti-eccentric long core-pulling rod disposed outside the forming column member, and the axis line of the anti-eccentric long core-pulling rod is perpendicular to the center line of the auxiliary forming column member.

[0008] In the above anti-eccentric long core-pulling mechanism for a tray injection mold, the oil cylinder driving member includes a driving oil cylinder disposed outside the anti-eccentric long core-pulling rod. A sliding member is connected to the power shaft of the driving oil cylinder, and the anti-eccentric long core-pulling rod is slidably engaged with the sliding member.

[0009] In the above anti-eccentric long core-pulling mechanism for a tray injection mold, the sliding member includes a fixed seat and an inner sliding table. The power shaft of the driving oil cylinder is connected to the inner sliding table. The inner sliding table is slidably engaged with the fixed seat, and the anti-eccentric long core-pulling rod is slidably engaged with the inner sliding table.

[0010] In the above anti-eccentric long core-pulling mechanism for a tray injection mold, an inclined chute is provided inside the inner sliding table. A connecting head extending into the inclined chute is provided at the end of the anti-eccentric long core-pulling rod, and the connecting head is slidably engaged with the inclined chute.

[0011] In the above anti-eccentric long core-pulling mechanism for a tray injection mold, a straight chute is provided inside the fixed seat. Limiting convex strips are provided on both sides of the inner sliding table, and the limiting convex strips are slidably engaged with the straight chute.

[0012] In the above anti-eccentric long core-pulling mechanism for a tray injection mold, the axis line of the power shaft of the driving oil cylinder is perpendicular to the axis line of the anti-eccentric long core-pulling rod.

[0013] In the above anti-eccentric long core-pulling mechanism for a tray injection mold, the auxiliary forming column member includes an auxiliary forming column body and a column head, and the column head is snap-fitted with the forming column positioning groove.

[0014] In the above anti-eccentric long core-pulling mechanism for a tray injection mold, the outside of the auxiliary forming column body is in abutting engagement with the anti-eccentric long core-pulling rod.

[0015] In the above anti-eccentric long core-pulling mechanism for a tray injection mold, the injection part includes an injection hole provided in the forming template.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows:

[0017] 1. During the injection molding process of the present utility model, the molten material is injected through the injection part. The tray forming surface is used to form the tray structure, and the auxiliary forming column is used to form the column hole structure of the plastic part. The anti-eccentric long core-pulling component is driven by the oil cylinder driving part to move, so that the anti-eccentric long core-pulling component abuts against the outside of the auxiliary forming column to hold it and prevent the auxiliary forming column from being eccentric. When the injection reaches about 3 / 4 of a certain wall thickness, the oil cylinder driving part retracts. This structure can avoid the eccentricity of the auxiliary forming column during the injection molding process due to the injection pressure, ensuring the forming accuracy of the injection molding.

[0018] 2. The axis line of the power shaft of the driving oil cylinder in the present utility model is perpendicular to the axis line of the anti-eccentric long core-pulling rod, which is convenient for controlling the stroke.

[0019] Other advantages, objectives and features of the present utility model will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present utility model. Brief Description of the Drawings

[0020] Figure 1 is the structural schematic diagram of the present utility model.

[0021] Figure 2 is the partial structural schematic diagram of the present utility model.

[0022] Figure 3 is the structural schematic diagram of the anti-eccentric long core-pulling component.

[0023] Figure 4 is the connection schematic diagram of the anti-eccentric long core-pulling component

[0024] In the figure: forming template 1, tray forming surface 2, forming column positioning groove 3, auxiliary forming column 4, anti-eccentric long core-pulling component 5, oil cylinder driving part 6, injection part 7, anti-eccentric long core-pulling rod 8, driving oil cylinder 9, sliding part 10, fixed seat 11, inner sliding table 12, oblique sliding groove 13, connecting head 14, straight sliding groove 15, limiting convex strip 16, auxiliary forming column body 17, column head 18, injection hole 19. Detailed Description of the Preferred Embodiment

[0025] The present utility model will be further described below with reference to the accompanying drawings.

[0026] As Figures 1-4As shown in the figure, an anti-eccentric long core-pulling mechanism for a tray injection mold includes a molding template 1. Inside the molding template 1, there is a tray molding surface 2. Inside the tray molding surface 2, there are several molding post positioning grooves 3. Below the molding template 1, there is an auxiliary molding post part 4 that is opposite in position and matching in shape to the molding post positioning grooves 3. Below the molding template 1, there is also an anti-eccentric long core-pulling component 5 that can move along one end outside the auxiliary molding post part 4 closer to or farther away from it. Outside the anti-eccentric long core-pulling component 5, there is an oil cylinder driving part 6 for driving the anti-eccentric long core-pulling component 5 to move. Inside the molding template 1, there is an injection part 7 connected to the tray molding surface 2.

[0027] In this embodiment, during the injection molding process, the molten material is injected through the injection part 7. The tray molding surface 2 is used to mold the tray structure, and the auxiliary molding post part 4 is used to mold the column hole structure of the plastic part. The oil cylinder driving part 6 drives the anti-eccentric long core-pulling component 5 to move, so that the anti-eccentric long core-pulling component 5 abuts against the outside of the auxiliary molding post part 4 to hold it and prevent the auxiliary molding post part 4 from being eccentric. When the injection reaches about 3 / 4 of a certain wall thickness, the oil cylinder driving part 6 retracts. This structure can avoid the auxiliary molding post part 4 from being eccentric due to the injection pressure during the injection molding process, ensuring the molding accuracy of the injection.

[0028] Combined with Figures 1-4 As shown in the figure, the anti-eccentric long core-pulling component 5 includes an anti-eccentric long core-pulling rod 8 arranged outside the molding post part 4. The axis line of the anti-eccentric long core-pulling rod 8 is perpendicular to the center line of the auxiliary molding post part 4.

[0029] Specifically, during the injection molding process, the oil cylinder driving part 6 drives the anti-eccentric long core-pulling rod 8 to move, so that the anti-eccentric long core-pulling rod 8 abuts against the outside of the auxiliary molding post part 4 to hold it and prevent the auxiliary molding post part 4 from being eccentric. When the injection reaches about 3 / 4 of a certain wall thickness, the oil cylinder driving part 6. This structure can avoid the auxiliary molding post part 4 from being eccentric due to the injection pressure during the injection molding process, ensuring the molding accuracy of the injection.

[0030] Combined with Figure 3 、 Figure 4As shown in the figure, the oil cylinder driving member 6 includes a driving oil cylinder 9 arranged outside the anti-eccentric long core-pulling rod 8. A sliding member 10 is connected to the power shaft of the driving oil cylinder 9. The anti-eccentric long core-pulling rod 8 is slidably engaged with the sliding member 10. The sliding member 10 includes a fixed seat 11 and an inner sliding table 12. The power shaft of the driving oil cylinder 9 is connected to the inner sliding table 12. The inner sliding table 12 is slidably engaged with the fixed seat 11. The anti-eccentric long core-pulling rod 8 is slidably engaged with the inner sliding table 12. An inclined chute 13 is provided inside the inner sliding table 12. A connecting head 14 extending into the inclined chute 13 is provided at the end of the anti-eccentric long core-pulling rod 8. The connecting head 14 is slidably engaged with the inclined chute 13. A straight chute 15 is provided inside the fixed seat 11. Limiting convex strips 16 are provided on both sides of the inner sliding table 12. The limiting convex strips 16 are slidably engaged with the straight chute 15.

[0031] In this embodiment, before injection molding, the driving oil cylinder 9 is started. The power shaft of the driving oil cylinder 9 drives the inner sliding table 12 to slide along the straight chute 15 of the fixed seat 11. The limiting convex strips 16 are slidably engaged with the straight chute 15 to play a role in limiting and preventing detachment. After the inner sliding table 12 moves, the connecting head 14 moves outward along the inclined track of the inclined chute 13 to the outside of the auxiliary forming column member 4 until it abuts, preventing the auxiliary forming column member 4 from being eccentric. When the injection reaches about 3 / 4 of a certain wall thickness, the oil cylinder driving member 6 retracts. This structure can avoid the eccentricity of the auxiliary forming column member 4 during the injection molding process due to the injection pressure, ensuring the forming accuracy of the injection molding.

[0032] The axis line of the power shaft of the driving oil cylinder 9 is perpendicular to the axis line of the anti-eccentric long core-pulling rod 8.

[0033] In this embodiment, the axis line of the power shaft of the driving oil cylinder 9 is perpendicular to the axis line of the anti-eccentric long core-pulling rod 8, which is convenient for controlling the stroke.

[0034] Combined with Figure 1 As shown in the figure, the auxiliary forming column member 4 includes an auxiliary forming column body 17 and a column head 18. The column head 18 is snap-fitted with the forming column positioning groove 3.

[0035] In this embodiment, during the injection molding process, the column head 18 is snap-fitted with the forming column positioning groove 3 to achieve positioning. The auxiliary forming column body 17 is used to form the column hole structure of the plastic part.

[0036] Combined with Figure 1 、 Figure 2 As shown in the figure, the outside of the auxiliary forming column body 17 is in abutting contact with the anti-eccentric long core-pulling rod 8. The injection part 7 includes an injection hole 19 provided in the forming template 1.

[0037] In this embodiment, the molten material is injected into the cavity through the injection hole 19.

[0038] The working principle of the utility model is as follows:

[0039] During the injection molding process, the molten material is injected through the injection hole 19. The tray forming surface 2 is used to form the tray structure, and the auxiliary forming cylinder 17 is used to form the column hole structure of the plastic part. The column head 18 is engaged with the forming column positioning groove 3 to achieve positioning. Before injection molding, the driving oil cylinder 9 is started, and the power shaft of the driving oil cylinder 9 drives the inner sliding table 12 to slide along the straight sliding groove 15 of the fixed seat 11. The limiting rib 16 is slidably engaged with the straight sliding groove 15 to play a role in limiting and preventing detachment. After the inner sliding table 12 moves, the connecting head 14 moves outward along the oblique track of the oblique sliding groove 13 to the outside of the auxiliary forming column part 4 until it abuts, preventing the auxiliary forming column part 4 from being eccentric. When the injection reaches about 3 / 4 of a certain wall thickness, the oil cylinder driving part 6 retracts. This structure can avoid the eccentricity of the auxiliary forming column part 4 during the injection molding process due to the injection pressure, ensuring the molding accuracy of the injection molding. The axis line of the power shaft of the driving oil cylinder 9 is perpendicular to the axis line of the anti-eccentric long core-pulling rod 8, which is convenient for controlling the stroke.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the utility model. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the utility model.

[0041] Although terms such as forming template 1, tray forming surface 2, forming column positioning groove 3, auxiliary forming column part 4, anti-eccentric long core-pulling assembly 5, oil cylinder driving part 6, injection molding part 7, anti-eccentric long core-pulling rod 8, driving oil cylinder 9, sliding part 10, fixed seat 11, inner sliding table 12, oblique sliding groove 13, connecting head 14, straight sliding groove 15, limiting rib 16, auxiliary forming cylinder 17, column head 18, injection hole 19, etc. are used more in this article, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the utility model, and interpreting them as any additional limitation is contrary to the spirit of the utility model.

Claims

1. An anti-eccentric long core-pulling mechanism for a tray injection mold, comprising a molding template (1), characterized in that, The forming template (1) is provided with a tray forming surface (2). A number of forming column positioning grooves (3) are arranged in the tray forming surface (2). Below the forming template (1), there is an auxiliary forming column member (4) which is opposite in position and matching in shape with the forming column positioning grooves (3). Below the forming template (1), there is also an anti-eccentric long core-pulling assembly (5) which can move along one end outside the auxiliary forming column member (4) close to or away from it. An oil cylinder driving member (6) for driving the anti-eccentric long core-pulling assembly (5) to move is arranged outside the anti-eccentric long core-pulling assembly (5). An injection molding part (7) connected to the tray forming surface (2) is arranged in the forming template (1).

2. The eccentric long core-pulling mechanism for the tray injection mold according to claim 1, characterized in that, The anti-eccentric long core-pulling assembly (5) includes an anti-eccentric long core-pulling rod (8) arranged outside the forming column member (4). The axis line of the anti-eccentric long core-pulling rod (8) is perpendicular to the center line of the auxiliary forming column member (4).

3. The anti-eccentric long core-pulling mechanism for the tray injection mold according to claim 2, wherein, The oil cylinder driving member (6) includes a driving oil cylinder (9) arranged outside the anti-eccentric long core-pulling rod (8). A sliding member (10) is connected to the power shaft of the driving oil cylinder (9). The anti-eccentric long core-pulling rod (8) is in sliding fit with the sliding member (10).

4. The anti-eccentric long core-pulling mechanism for the tray injection mold according to claim 3, characterized in that, The sliding member (10) includes a fixed seat (11) and an inner sliding table (12). The power shaft of the driving oil cylinder (9) is connected to the inner sliding table (12). The inner sliding table (12) is in sliding fit with the fixed seat (11). The anti-eccentric long core-pulling rod (8) is in sliding fit with the inner sliding table (12).

5. The eccentric long core-pulling mechanism for tray injection molds according to claim 4, characterized in that, An inclined chute (13) is arranged in the inner sliding table (12). A connecting head (14) extending into the inclined chute (13) is arranged at the end of the anti-eccentric long core-pulling rod (8). The connecting head (14) is in sliding fit with the inclined chute (13).

6. The anti-eccentric long core-pulling mechanism for the tray injection mold according to claim 5, characterized in that, A straight chute (15) is arranged in the fixed seat (11). Limiting convex strips (16) are arranged on both sides of the inner sliding table (12). The limiting convex strips (16) are in sliding fit with the straight chute (15).

7. The eccentric long core-pulling mechanism for the tray injection mold according to claim 6, wherein, The axis line of the power shaft of the driving oil cylinder (9) is perpendicular to the axis line of the anti-eccentric long core-pulling rod (8).

8. The anti-eccentric long core-pulling mechanism for the tray injection mold according to claim 7, characterized in that, The auxiliary forming column member (4) includes an auxiliary forming column body (17) and a column head (18). The column head (18) is in snap-fit with the forming column positioning groove (3).

9. The eccentric long core-pulling mechanism for the tray injection mold according to claim 8, characterized in that, The outer side of the auxiliary forming column body (17) is in abutting fit with the anti-eccentric long core-pulling rod (8).

10. The eccentric long core-pulling mechanism for the tray injection mold according to claim 9, characterized in that, The injection molding part (7) includes an injection hole (19) arranged in the forming template (1).

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