Two-stage tripping sliding block core-pulling demolding structure

Abstract

The utility model relates to a two-stage tripping slide block core-pulling demoulding structure which is characterized in that an oil cylinder slide block is arranged on a rear mould, a core-pulling slide block is arranged at the top of the oil cylinder slide block, the core-pulling slide block comprises a body positioned at the rear section and a tongue part positioned at the front section, and an inclined guide pillar fixing block is arranged at the top of the body of the core-pulling slide block; a core pulling guide block is arranged above the tongue position of the core pulling sliding block, the core pulling guide block is vertically and fixedly arranged on the oil cylinder sliding block, the bottom end of the core pulling guide block abuts against the surface of the tongue position of the core pulling sliding block, a pulling core is arranged above the tongue position of the core pulling sliding block, and the bottom end of the core pulling guide block abuts against the surface of the tongue position of the core pulling sliding block. The loose core is arranged on the periphery of the loose core guide block in a sleeved mode, the loose core makes contact with the loose core sliding block, and the contact surfaces of the loose core sliding block and the loose core are connected in a matched mode through a dovetail groove structure. According to the utility model, the inverted buckle in the vertical direction is separated through the action of the secondary slide block, and the dovetail groove guide mechanism can be used in products and molds with smaller spaces.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a two-stage release slider core-pulling and demoulding structure. Background Art

[0002] Injection molding is an important method for product formation. It utilizes the principle that plastic materials change shape under high temperature and high pressure to form various plastic materials into desired products using plastic molds. Currently, some plastic parts require not only core pulling after injection molding, but also a tilted ejection method at the barb to remove the barb from the product. However, current injection molds generally only have this method for core pulling and ejection.

[0003] In the existing technology, for product structures with multiple inverted buckle directions, when a simple core-pulling slider or inclined top structure cannot complete the disengagement, it is necessary to consider adding a disengagement structure to the original slider or inclined top structure, and give priority to disengaging before the large structure completes the disengagement, and then retreat with the large structure, and finally complete the complete disengagement of all buckle positions to achieve smooth ejection and removal of the product. Utility Model Content

[0004] In response to the shortcomings of the above-mentioned prior art, such as the inability of simple core-pulling sliders or inclined top structures to complete the disengagement of product structures with multiple undercut directions, the applicant provides a rationally structured two-stage disengagement slider core-pulling and demoulding structure, which can achieve the disengagement of vertical undercuts through the action of the secondary slider and can be applied to products and molds with smaller spaces.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A two-stage tripping slider core pulling and demolding structure, a cylinder slider is provided on the rear mold, a core pulling slider is provided on the top of the cylinder slider, the core pulling slider includes a body located in the rear section and a tongue located in the front section, an inclined guide column fixing block is provided on the top of the body of the core pulling slider, the inclined guide column fixing block is downwardly connected to the inclined guide column, the inclined guide column is inclined and extends into the body of the core pulling slider, a core pulling guide block is provided above the tongue position of the core pulling slider, the core pulling guide block is vertically fixed on the cylinder slider, the bottom end of the core pulling guide block abuts against the tongue surface of the core pulling slider, a core pulling is provided above the tongue position of the core pulling slider, the core pulling sleeve is arranged on the outer periphery of the core pulling guide block, the core pulling and the core pulling slider contact each other, and the core pulling slider and the core pulling are connected to each other through a dovetail groove structure on the mutual contact surface.

[0007] As a further improvement of the above technical solution:

[0008] The oil cylinder slider is provided with corresponding oil cylinder slider pressing strips on both sides, which press the extended edges of the oil cylinder slider to limit and guide the sliding of the oil cylinder slider.

[0009] The oil cylinder slider is provided with a surrounding accommodation cavity on the top, which is used for accommodating and partially surrounding the core-pulling slider.

[0010] The body and the tongue of the core-pulling slider are integrally formed, the tongue is lower than the height of the body, the tongue extends into the front end of the accommodation cavity of the oil cylinder slider and is arranged in the channel formed by the accommodation cavity, and the body is located at the rear end of the accommodation cavity and is arranged in a semi-surrounding manner in the open area of the accommodation cavity.

[0011] The core-pulling guide block is vertically fixed on the wall of the oil cylinder slider accommodation cavity, and when the core-pulling slider is driven to slide, the core-pulling slider advances or retreats along the contact surface of the core-pulling guide block.

[0012] The core-pulling slider guide block is fixed in the accommodation cavity of the oil cylinder slider, the core-pulling slider limiting block is arranged on the oil cylinder slider at the rear end of the core-pulling slider, and the core-pulling slider limiting block cooperates with the slot at the rear end of the core-pulling slider to limit the sliding distance of the core-pulling slider.

[0013] The dovetail groove structure is arranged on the entire length of the contact surface of the core-pulling slider and the core.

[0014] The tongue top of the core-pulling slider is provided with a dovetail-shaped protruding part, the bottom surface of the core is provided with a dovetail groove matched with the protruding part of the core-pulling slider, the protruding part of the core-pulling slider is arranged in the dovetail groove of the core to form mutual cooperation, or the tongue top of the core-pulling slider is provided with a dovetail groove, and the bottom surface of the core is provided with a dovetail-shaped protruding part matched with the dovetail groove of the core-pulling slider, and the protruding part of the core is arranged in the dovetail groove of the core-pulling slider to form mutual cooperation.

[0015] The slider limiter is arranged on the contact surface of the oil cylinder slider and the core-pulling slider, the slider limiter is internally provided with a spring and a spring block, the spring block is connected with the spring in the slider limiter, the top of the spring block is provided with a prismatic strip, and the core-pulling slider is provided with a limiting sharp mouth matched with the prismatic strip.

[0016] The limiting sharp mouth is arranged at the initial position and the maximum position of the stroke of the core-pulling slider relative to the slider limiter.

[0017] The core-pulling slider and the core are matched with each other in the dovetail groove structure, the core-pulling slider is arranged in the accommodation cavity of the oil cylinder slider, the core-pulling slider limiting block is arranged on the oil cylinder slider at the rear end of the core-pulling slider, the core-pulling guide block is vertically fixed on the wall of the oil cylinder slider accommodation cavity, the slider limiter is arranged on the contact surface of the oil cylinder slider and the core-pulling slider, and the limiting sharp mouth is arranged at the initial position and the maximum position of the stroke of the core-pulling slider relative to the slider limiter.

[0018] This new design utilizes a two-stage slider to disengage the vertical undercut and a dovetail guide mechanism, making it suitable for use in products and molds with limited space. This avoids the need for frequent changes to product design due to complex product structures, which wastes time and costs in early development. The new design incorporates core-pulling guide blocks within the mold to ensure smooth core-pulling motion, preventing mold release failures and product scrapping caused by structural jams. This design can significantly reduce product development costs and mold development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the present utility model.

[0020] Figure 2 It is a cross-sectional view of the present invention.

[0021] Figure 3 This is a schematic diagram of the dovetail groove structure of the present invention.

[0022] Figure 4 This is a schematic diagram of the working of the utility model Figure 1 .

[0023] Figure 5 This is a schematic diagram of the working of the utility model Figure 2 .

[0024] The markings in the figure are: 1. Cylinder slider; 2. Cylinder slider pressure strip; 3. Driving cylinder; 4. Core-pulling slider; 5. Inclined guide column fixing block; 6. Inclined guide column; 7. Locking screw; 8. Core-pulling guide block; 9. Fixing screw; 10. Core pulling; 11. Core-pulling slider guide block; 12. Core-pulling slider limit block; 13. Slider limiter; 14. Product. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0026] Reference Figures 1 to 5 As shown, the two-stage tripping slider core-pulling demolding structure described in the present invention has a cylinder slider 1 provided on the rear mold. The cylinder slider 1 can slide and displace under the drive of the driving cylinder 3. Corresponding cylinder slider strips 2 are provided on both sides of the cylinder slider 1. The cylinder slider strips 2 press the extended edge of the cylinder slider 1 to limit and guide the sliding of the cylinder slider 1. One end of the cylinder slider 1 is connected to the output shaft of the driving cylinder 3. The driving cylinder 3 drives the cylinder slider 1 to move, and the cylinder slider 1 slides along the guide direction of the cylinder slider strip 2. A surrounding accommodating cavity is provided at the top of the cylinder slider 1. The accommodating cavity of the cylinder slider 1 is used to accommodate the core-pulling slider 4 and partially surround the core-pulling slider 4.

[0027] The core-pulling slider 4 comprises a body at the rear section and a tongue at the front section, the body and the tongue of the core-pulling slider 4 are integrally formed, the tongue of the core-pulling slider 4 is lower than the height of the body of the core-pulling slider 4, the tongue of the core-pulling slider 4 extends into the front end of the accommodating cavity of the oil cylinder slider 1 and is arranged to extend in the channel formed by the accommodating cavity of the oil cylinder slider 1. The body of the core-pulling slider 4 is located at the rear end of the accommodating cavity of the oil cylinder slider 1 and is arranged to be semi-enclosed in the open area of the accommodating cavity of the oil cylinder slider 1. The accommodating cavity of the oil cylinder slider 1 surrounds the front side and the left and right sides of the body of the core-pulling slider 4 and leaves space for the core-pulling slider 4 to move away freely at the rear side.

[0028] The body of the core-pulling slider 4 is provided with an inclined guide pillar fixing block 5, the inclined guide pillar fixing block 5 is connected downwardly with an inclined guide pillar 6, the inclined guide pillar 6 is arranged obliquely and extends into a through hole in the body of the core-pulling slider 4, and the inclined guide pillar 6 can move in the through hole in the body of the core-pulling slider 4. When the inclined guide pillar fixing block 5 drives the inclined guide pillar 6 to move vertically, the inclined guide pillar 6 can drive the core-pulling slider 4 to move horizontally through the inclined cooperation between the inclined guide pillar 6 and the body of the core-pulling slider 4. The inclined guide pillar fixing block 5 is installed on an inclined guide pillar driving mechanism through locking screws 7, the inclined guide pillar driving mechanism drives the inclined guide pillar fixing block 5 to drive the inclined guide pillar 6 to move vertically, and the horizontal sliding of the core-pulling slider 4 is realized.

[0029] A core-pulling guide block 8 is arranged above the position of the tongue of the core-pulling slider 4, the core-pulling guide block 8 is arranged vertically and fixedly on the cavity wall of the oil cylinder slider 1, the bottom end of the core-pulling guide block 8 abuts against the surface of the tongue of the core-pulling slider 4, the core-pulling guide block 8 cooperates with the tongue of the core-pulling slider 4, the core-pulling guide block 8 and the tongue of the core-pulling slider 4 have mutually contacting surfaces, when the core-pulling slider 4 is driven to slide, the core-pulling slider 4 will advance or retreat along the contacting surface of the core-pulling guide block 8, and the sliding guide of the core-pulling slider 4 can be realized through the arrangement of the core-pulling guide block 8. The core-pulling guide block 8 is fixedly arranged on the cavity wall of the oil cylinder slider 1 through fixing screws 9.

[0030] A core-pulling block 10 is arranged above the position of the tongue of the core-pulling slider 4, the core-pulling block 10 is provided with a through hole matched with the core-pulling guide block 8, the core-pulling guide block 8 is inserted into the through hole of the core-pulling block 10, the core-pulling block 10 is sleeved on the outer periphery of the core-pulling guide block 8 and can slide freely along the core-pulling guide block 8. The core-pulling block 10 directly contacts a molded product 14 in the injection mold, the product 14 has an undercut structure at the position of the core-pulling block 10. The core-pulling block 10 and the core-pulling slider 4 are in contact with each other, and are connected through dovetail groove structures on the mutually contacting surfaces of the core-pulling slider 4 and the core-pulling block 10. The dovetail groove structures are arranged on the entire length of the contacting surfaces of the core-pulling slider 4 and the core-pulling block 10.

[0031] Preferably, the tongue top of the core-pulling slider 4 has a dovetail-shaped protrusion, and the bottom surface of the core 10 is provided with a dovetail groove matched with the protrusion of the core-pulling slider 4. The protrusion of the core-pulling slider 4 is arranged in the dovetail groove of the core 10 to form mutual cooperation. Alternatively, the tongue top of the core-pulling slider 4 is provided with a dovetail groove, and the bottom surface of the core 10 has a dovetail-shaped protrusion matched with the dovetail groove of the core-pulling slider 4. The protrusion of the core 10 is arranged in the dovetail groove of the core-pulling slider 4 to form mutual cooperation.

[0032] The core-pulling slider guide block 11 is arranged on both sides of the core-pulling slider 4 and fixed in the accommodating cavity of the oil cylinder slider 1 to guide and limit the sliding of the core-pulling slider 4. The core-pulling slider limiting block 12 is arranged on the oil cylinder slider 1 at the rear end of the core-pulling slider 4 and matched with the slot at the rear end of the core-pulling slider 4 to limit the sliding distance of the core-pulling slider 4.

[0033] The slider limiter 13 is arranged on the contact surface of the oil cylinder slider 1 and the core-pulling slider 4. The slider limiter 13 is internally provided with a spring and a spring block. The spring block is connected with the spring in the slider limiter 13 and can compress the spring to elastically lift. The top of the spring block is provided with a prismatic strip. The core-pulling slider 4 is provided with a limiting sharp mouth corresponding to the prismatic strip. The prismatic strip of the slider limiter 13 is matched with the limiting sharp mouth on the core-pulling slider 4 to resist the core-pulling slider 4 and prevent the core-pulling slider 4 from being displaced. The limiting sharp mouth can be arranged on the core-pulling slider 4 at the initial position and the maximum position of the stroke of the core-pulling slider 4.

[0034] In the working process of the utility model, when the mold is opened, the oil cylinder slider 1 remains stationary, the inclined guide column 6 drives the core-pulling slider 4 to retreat, the core 10 falls under the driving of the dovetail groove structure between the core-pulling slider 4 and the core 10 and the guiding of the core guide block 8 and is separated from the undercut structure above the product 14. Then, the core-pulling slider 4 stops retreating when encountering the core-pulling slider limiting block 12. After the mold is completely opened, the driving oil cylinder 3 drives the oil cylinder slider 1 to retreat, drives the whole mechanism of the core-pulling slider 4 to retreat and separates from the large-face undercut area of the product 14. At this time, the unclamping of all the undercuts of the product 14 is completed. Subsequently, the product 14 can be smoothly ejected and taken out.

[0035] The utility model adopts the dovetail groove guiding mechanism and can be used in the product and mold with small space. The utility model avoids the waste of time and cost in the early stage of research and development due to the frequent change of product structure caused by the complex product structure. The mold adopts the core guide block, which can ensure the smooth movement of the core structure and avoid the situation that the structure is stuck and the product is scrapped. The utility model can realize more economical product research and development cost and lower mold development cost.

[0036] Finally, it is explained that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limited, although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A two-stage release slider core-pulling demoulding structure, characterized by: A cylinder slider (1) is provided on the rear mold, a core-pulling slider (4) is provided on the top of the cylinder slider (1), the core-pulling slider (4) comprises a body located at the rear section and a tongue located at the front section, an inclined guide column fixing block (5) is provided on the top of the body of the core-pulling slider (4), the inclined guide column fixing block (5) is downwardly connected to the inclined guide column (6), the inclined guide column (6) is inclinedly provided and extends into the body of the core-pulling slider (4), and a core-pulling guide block is provided above the tongue of the core-pulling slider (4) (8), the core pulling guide block (8) is vertically fixed on the oil cylinder slider (1), the bottom end of the core pulling guide block (8) is against the tongue surface of the core pulling slider (4), a core pulling (10) is provided above the tongue position of the core pulling slider (4), the core pulling (10) is sleeved on the outer periphery of the core pulling guide block (8), the core pulling (10) and the core pulling slider (4) are in contact with each other, and the core pulling slider (4) and the core pulling (10) are connected to each other through a dovetail groove structure on the mutual contact surface.

2. The two-stage tripping slider core-pulling and demoulding structure according to claim 1 is characterized in that: Corresponding cylinder slider beadings (2) are provided on both sides of the cylinder slider (1). The cylinder slider beadings (2) press the extended edges of the cylinder slider (1) to limit and guide the cylinder slider (1).

3. The two-stage tripping slider core-pulling and demoulding structure according to claim 1, characterized in that: A accommodating cavity is provided on the top of the oil cylinder slider (1), and the accommodating cavity of the oil cylinder slider (1) is used to accommodate the core-pulling slider (4) and partially surround the core-pulling slider (4).

4. The two-stage tripping slider core-pulling and demoulding structure according to claim 3 is characterized in that: The body and tongue of the core-pulling slider (4) are integrally formed. The tongue of the core-pulling slider (4) is lower than the height of the body of the core-pulling slider (4). The tongue of the core-pulling slider (4) extends into the front end of the accommodating cavity of the oil cylinder slider (1) and extends in the channel formed by the accommodating cavity of the oil cylinder slider (1). The body of the core-pulling slider (4) is located at the rear end of the accommodating cavity of the oil cylinder slider (1) and is semi-enclosed in the open area of ​​the accommodating cavity of the oil cylinder slider (1).

5. The two-stage tripping slider core-pulling and demoulding structure according to claim 3, characterized in that: The core pulling guide block (8) is vertically fixed on the wall of the cavity of the oil cylinder slider (1). When the core pulling slider (4) is driven to slide, the core pulling slider (4) moves forward or backward along the contact surface of the core pulling guide block (8).

6. The two-stage tripping slider core-pulling and demoulding structure according to claim 3, characterized in that: Core-pulling slider guide blocks (11) are provided on both sides of the core-pulling slider (4), the core-pulling slider guide blocks (11) are fixed in the accommodating cavity of the oil cylinder slider (1), and a core-pulling slider limiting block (12) is provided on the oil cylinder slider (1) at the rear end of the core-pulling slider (4). The core-pulling slider limiting block (12) cooperates with the slot at the rear end of the core-pulling slider (4) to limit the sliding distance of the core-pulling slider (4).

7. The two-stage tripping slider core-pulling and demoulding structure according to claim 1, characterized in that: The dovetail groove structure is arranged on the entire length of the contact surface between the core pulling slider (4) and the core pulling (10).

8. The two-stage tripping slider core-pulling and demoulding structure according to claim 1, characterized in that: The top of the tongue of the core-pulling slider (4) has a dovetail-shaped raised portion, the bottom surface of the core-pulling slider (10) is provided with a dovetail groove that matches the raised portion of the core-pulling slider (4), and the raised portion of the core-pulling slider (4) is arranged in the dovetail groove of the core-pulling slider (10) to form a mutual fit; or the top of the tongue of the core-pulling slider (4) is provided with a dovetail groove, the bottom surface of the core-pulling slider (10) has a dovetail-shaped raised portion that matches the dovetail groove of the core-pulling slider (4), and the raised portion of the core-pulling slider (10) is arranged in the dovetail groove of the core-pulling slider (4) to form a mutual fit.

9. The two-stage tripping slider core-pulling and demoulding structure according to claim 1, characterized in that: An embedded slider limiter (13) is provided on the contact surface between the oil cylinder slider (1) and the core-pulling slider (4), a spring and an elastic block are provided inside the slider limiter (13), the elastic block is connected to the spring inside the slider limiter (13), a prismatic strip is provided on the top of the elastic block, and a limiting tip corresponding to the prismatic strip is provided on the core-pulling slider (4).

10. The two-stage tripping slider core-pulling and demoulding structure according to claim 9, characterized in that: Limiting tips are provided on the core-pulling slider (4) at the initial position and the maximum position of the stroke at which the slider limiter (13) moves relative to the slider.

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