A time-delay row mechanism for preventing sticking of a front mold and a method of use

Abstract

This invention relates to a delayed sliding mechanism and its application method for preventing sticking to the front mold. The mechanism includes a slider, a sliding seat that drives the slider to move laterally, and an inclined guide post that drives the sliding seat. One side of the slider is connected to the sliding seat, and the other side is provided with a pressing part that holds the product. The sliding seat has an inclined hole that mates with the inclined guide post, and a delay time interval is reserved on the inner wall of the side of the inclined hole away from the slider. The mechanism also includes a delay block. Both the delay block and the inclined guide post are mounted on the front mold plate and are driven synchronously by the front mold plate. The delay block has a limiting block that abuts against the side surface of the sliding seat away from the slider. Using the method of this application, the delayed limiting structure and the inclined guide post move longitudinally and are driven synchronously by the front mold plate. This not only eliminates the need for additional drive structures, ensuring smooth mold opening, but also simplifies control. The overall structure is reasonable and compact, and the anti-sticking effect on the front mold is excellent.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and more specifically, to a delayed sliding mechanism and its application method for preventing sticking to the front mold. Background Technology

[0002] Sticking to the front mold is a common problem in injection mold design. It manifests as follows: when the mold opens, the product sticks to the upper mold core and moves with it, making it difficult to demold normally. The usual solution is to add a pre-pull-in to the front mold to hold the product in place and prevent it from moving with the front mold. Although this solves the problem, the design of the pre-pull-in structure is very complex, time-consuming, and difficult. In addition, using a pre-pull-in poses a risk of mold compression during mold closing.

[0003] Chinese patent application number 201811357356.5 provides a two-color mold to prevent products from sticking to the front mold. It uses a slanted pin, a slider, and a telescopic spring pin to press the product, which can solve the above-mentioned problems. However, the telescopic spring pin and the slider are designed to move in a perpendicular direction. This requires an additional control structure for the telescopic spring pin in the mold opening control, which is relatively complex. It also affects the smoothness of mold opening. Further improvements are needed to overcome this defect. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a delayed sliding mechanism for preventing the front mold from sticking, and to provide a method for applying the delayed sliding mechanism for preventing the front mold from sticking, in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A delayed sliding mechanism to prevent sticking to the front mold is constructed, comprising a slider, a sliding seat that drives the slider to move laterally, and an inclined guide post that drives the sliding seat. One side of the slider is connected to the sliding seat, and the other side is provided with a pressing part for holding the product. The sliding seat has an inclined hole that mates with the inclined guide post, and the inner wall of the inclined hole on the side away from the slider has a reserved delay distance. The mechanism also includes a delay block. The delay block and the inclined guide post are both mounted on the front mold plate and are driven by the front mold plate to move synchronously. The delay block has a limiting block that abuts against the surface of the sliding seat on the side away from the slider.

[0007] The delayed sliding mechanism for preventing sticking to the front mold according to the present invention further includes a reset push block and a first elastic element that provides lateral elastic force to the reset push block; the reset push block is located on the side of the sliding seat away from the slider, and the reset push block and the sliding seat clamp the limiting block when the mold is closed.

[0008] The delayed sliding mechanism for preventing sticking to the front mold according to the present invention further includes a transverse guide post, wherein the reset push block and the sliding seat are slidably disposed on the guide post; the first elastic element is a spring, and the guide post passes through the spring.

[0009] The delayed sliding mechanism for preventing sticking to the front mold according to the present invention includes a movable hole at the lower end of the delayed block that is longitudinally connected to the limiting block, a longitudinal guide post in the movable hole, and a guide hole at the upper end of the limiting block that mates with the guide post. A limiting flange is provided on the upper end or side surface of the limiting block, and a slot is provided on the inner wall of the movable hole for the limiting flange to move. A second elastic element is provided in the slot to provide a downward elastic force to the limiting block.

[0010] The delayed sliding mechanism for preventing sticking to the front mold according to the present invention has a guide slope provided on the side of the lower end of the limiting block near the sliding seat.

[0011] The delayed sliding mechanism for preventing sticking to the front mold according to the present invention includes a receiving groove on the side end that partially accommodates the product.

[0012] The delayed sliding mechanism for preventing sticking to the front mold according to the present invention includes a protrusion on the side surface of the product and a molding groove that mates with the protrusion on the inner wall of the receiving groove.

[0013] A method for preventing sticking to the front mold using a delayed sliding mechanism is provided. This method is applied to the aforementioned delayed sliding mechanism for preventing sticking to the front mold, and its implementation is as follows:

[0014] During injection molding, the holding part on the slider participates in forming the inner wall of the injection cavity;

[0015] When the mold is opened, the front mold plate moves upward, which drives the delay block and the inclined guide post to move upward synchronously. The slider seat is stopped by the limit block and does not move. The slider is also in a stopped state. The holding part holds the product to prevent the product from moving with the front mold plate and sticking to the front mold.

[0016] When the limit block moves upward with the delay block to the point of disengaging from the slider seat, the limit on the slider seat is released. At this time, the inclined guide post has just completed the delay time or has not yet completed the delay time.

[0017] Then the inclined guide post continues to move upward with the front template until the drive sliding seat moves. The sliding seat drives the slider to move, and the pressing part on the slider releases the pressure on the product.

[0018] The beneficial effects of this invention are as follows: During injection molding, the holding part on the slider participates in forming the inner wall of the injection cavity; during mold opening, the front mold plate moves upward, driving the delay block and the inclined guide post to move upward synchronously. The slider seat is stopped by the limit block and does not move. The slider is also in a stopped state. The holding part holds the product to prevent the product from sticking to the front mold as it moves with the front mold plate; when the limit block moves upward with the delay block to disengage from the slider seat, it releases the limit on the slider seat. At this time, the inclined guide post has just completed the delay time distance or has not yet completed the delay time distance; then the inclined guide post continues to move upward with the front mold plate until it drives the slider seat to move. The slider seat drives the slider to move, and the holding part on the slider releases the pressure on the product; by applying the method of this application, the movement direction of the delay limit structure and the inclined guide post is both longitudinal, and they are driven synchronously by the front mold plate. This not only eliminates the need for additional drive structure design, ensuring smooth mold opening, but also makes the control simpler. The overall structure is reasonable and compact, and the anti-sticking effect to the front mold is good. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0020] Figure 1 This is a cross-sectional view of the delayed sliding mechanism for preventing sticking to the front mold according to a preferred embodiment of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0022] The preferred embodiment of the present invention includes a delayed sliding mechanism for preventing sticking to the front mold, such as... Figure 1 As shown, the mechanism includes a slider 1, a sliding seat 2 that drives the slider 1 to move laterally, and an inclined guide post 3 that drives the sliding seat 2. One side of the slider 1 is connected to the sliding seat 2, and the other side is provided with a pressing part 10 for pressing the product 4. The sliding seat 2 is provided with an inclined hole 20 that cooperates with the inclined guide post 3. The inner wall of the inclined hole 20 away from the slider 1 is reserved with a delay distance 21. The mechanism also includes a delay block 5. The delay block 5 and the inclined guide post 3 are both provided on the front template and are driven by the front template to move synchronously. The delay block 5 is provided with a limiting block 6 that abuts against the surface of the sliding seat 2 away from the slider 1.

[0023] During injection molding, the holding part 10 on the slider 1 participates in forming the inner wall of the injection cavity;

[0024] When the mold is opened, the front mold plate moves upward, which drives the delay block 5 and the inclined guide post 3 to move upward synchronously. The slider seat 2 is stopped by the limit block 6 and does not move. The slider 1 is also in a stopped state. The holding part 10 holds the product to prevent the product from moving with the front mold plate and sticking to the front mold.

[0025] When the limiting block 6 moves upward with the delay block 5 and disengages from the slider seat 2, the limiting on the slider seat 2 is released. At this time, the inclined guide post 3 has just completed the delay time distance 21 or has not yet completed the delay time distance 21. Then the inclined guide post 3 continues to move upward with the front template until it drives the slider seat 2 to move (if it has just completed the delay time distance, it can be driven directly; otherwise, it needs to complete the delay time distance first before driving). The slider seat 2 drives the slider 1 to move, and the pressing part 10 on the slider 1 releases the pressing on the product.

[0026] The method of this application uses a time-delayed limiting structure and a slanted guide post that move longitudinally and are driven synchronously by the front template. This not only eliminates the need for additional drive structures, ensuring smooth mold opening, but also simplifies control. The overall structure is reasonable and compact, and it has a good anti-sticking effect on the front mold.

[0027] Preferably, the mechanism further includes a reset push block 7 and a first elastic element 8 that provides lateral elastic force to the reset push block 7; the reset push block 7 is located on the side of the sliding seat 2 away from the slider 1, and the reset push block 7 and the sliding seat 2 clamp the limiting block 6 when the mold is closed;

[0028] The purpose of the reset push block 7 is as follows: when the limit block 6 is not disengaged from the sliding seat 2, the reset push block 7 elastically abuts against the limit block 6 to improve stability; when the limit block 6 is disengaged from the sliding seat 2, the reset push block 7 will move and abut against the sliding seat 2 under the elastic force of the first elastic element 8, ensuring the reliability of the sliding seat 2 and the inclined guide post 3, thereby ensuring the smooth and stable mold opening; it should be noted that when closing the mold, the reset push block 7 needs to be pulled away from the side away from the sliding seat 2 first, leaving a gap for the limit block 6 to move downward; in order to avoid the limit block 6 colliding with the sliding seat 2 when it moves downward, a guide slope 60 can be provided on the side of the lower end of the limit block 6 near the sliding seat 2.

[0029] Preferably, the mechanism further includes a transverse guide post 9, and the reset push block 7 and the sliding seat 2 are slidably disposed on the guide post 9; the first elastic element 8 is a spring, and the guide post 9 passes through the spring; with this design, the structure becomes very simple, while ensuring the reliability of the relative movement of the reset push block 7 and the sliding seat 2.

[0030] Preferably, the lower end of the delay block 5 is provided with a movable hole 50 for longitudinally movable connection of the limiting block 6, and a longitudinal guide post 51 is provided in the movable hole 50. The upper end of the limiting block 6 is provided with a guide hole 61 that cooperates with the guide post 51. The upper end or side surface of the limiting block 6 is provided with a limiting flange 62. The inner wall of the movable hole 50 is provided with a slot 52 for the limiting flange 62 to move. A second elastic element 53 that provides a downward elastic force to the limiting block 6 is provided in the slot 52.

[0031] The purpose of using this flexible and movable limit block 6 is to prevent hard collision between the limit block 6 and the sliding seat 2, which could damage the mold. If necessary, position sensors can be installed at the position of the limit block 6 for position detection.

[0032] Preferably, the pressing part 10 includes a receiving groove that partially accommodates the side end of the product, the side surface of the product has a protrusion, and the inner wall of the receiving groove is provided with a molding groove that mates with the protrusion. It should be noted that the pressing part 10 can be designed according to the actual product, and the above description is only an example and is not intended to limit its structure.

[0033] A method for preventing sticking to the front mold using a delayed sliding mechanism is provided. This method is applied to the aforementioned delayed sliding mechanism for preventing sticking to the front mold, and its implementation is as follows:

[0034] During injection molding, the holding part on the slider participates in forming the inner wall of the injection cavity;

[0035] When the mold is opened, the front mold plate moves upward, which drives the delay block and the inclined guide post to move upward synchronously. The slider seat is stopped by the limit block and does not move. The slider is also in a stopped state. The holding part holds the product to prevent the product from moving with the front mold plate and sticking to the front mold.

[0036] When the limit block moves upward with the delay block to the point of disengaging from the slider seat, the limit on the slider seat is released. At this time, the inclined guide post has just completed the delay time or has not yet completed the delay time.

[0037] Then the inclined guide post continues to move upward with the front template until the drive sliding seat moves. The sliding seat drives the slider to move, and the pressing part on the slider releases the pressure on the product.

[0038] The method of this application uses a time-delayed limiting structure and a slanted guide post that move longitudinally and are driven synchronously by the front template. This not only eliminates the need for additional drive structures, ensuring smooth mold opening, but also simplifies control. The overall structure is reasonable and compact, and it has a good anti-sticking effect on the front mold.

[0039] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A delayed sliding mechanism for preventing sticking to the front mold, comprising a slider, a sliding seat for driving the slider to move laterally, and an inclined guide post for driving the sliding seat, characterized in that, One side of the slider is connected to the sliding seat, and the other side is provided with a pressing part for pressing the product; the sliding seat is provided with an oblique hole that cooperates with the oblique guide post, and the inner wall of the oblique hole away from the slider is reserved with a delay time interval; the mechanism also includes a delay block, the delay block and the oblique guide post are both set on the front template and are driven by the front template to move synchronously; the delay block is provided with a limiting block that abuts against the side surface of the sliding seat away from the slider; the mechanism also includes a reset push block and a first elastic element that provides lateral elastic force to the reset push block; the reset push block is located on the side of the sliding seat away from the slider, and when the mold is closed, the reset push block and the sliding seat clamp the limiting block; the mechanism also includes a transverse guide post, the reset push block and the sliding seat... The movable seat is slidably mounted on the guide post; the first elastic element is a spring, and the guide post passes through the spring; the lower end of the delay block is provided with a movable hole that longitudinally connects to the limiting block, and a longitudinal guide post is provided in the movable hole; the upper end of the limiting block is provided with a guide hole that mates with the guide post; the upper end or side surface of the limiting block is provided with a limiting flange, and the inner wall of the movable hole is provided with a slot for the limiting flange to move, and a second elastic element that provides a downward elastic force to the limiting block is provided in the slot; a guide slope is provided on the side of the lower end of the limiting block near the sliding seat; the pressing part includes a receiving groove that partially accommodates the side end of the product; the side surface of the product has a protrusion, and the inner wall of the receiving groove is provided with a forming groove that mates with the protrusion.

2. A method for applying a delayed sliding mechanism to prevent sticking to the front mold, applied to the delayed sliding mechanism for preventing sticking to the front mold as described in claim 1, characterized in that, The implementation method is as follows: During injection molding, the holding part on the slider participates in forming the inner wall of the injection cavity; When the mold is opened, the front mold plate moves upward, which drives the delay block and the inclined guide post to move upward synchronously. The slider seat is stopped by the limit block and does not move. The slider is also in a stopped state. The holding part holds the product to prevent the product from moving with the front mold plate and sticking to the front mold. When the limit block moves upward with the delay block to the point of disengaging from the slider seat, the limit on the slider seat is released. At this time, the inclined guide post has just completed the delay time or has not yet completed the delay time. Then the inclined guide post continues to move upward with the front template until the drive sliding seat moves. The sliding seat drives the slider to move, and the pressing part on the slider releases the pressure on the product.

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