Automatic ejection mechanism for inner runner of sliding block of injection mold

Abstract

The invention discloses an automatic ejection mechanism for a runner in a sliding block of an injection mold, a water gap for glue injection is formed in the top of the sliding block of the mold, an ejection rod structure capable of movably ejecting is arranged in the sliding block of the mold corresponding to the water gap, and an ejection driving structure is arranged at the lower part of the sliding block of the mold corresponding to the lower end of the ejection rod structure; the mold sliding block is of a sliding block structure which is arranged in a movable mold of the mold and can transversely move. The automatic ejection mechanism for the runner in the sliding block of the injection mold is reasonable in design, a water gap in the sliding block of the mold is simply and conveniently ejected, the water gap is automatically ejected, and the appearance quality of a product is improved; abnormal manual separation of the runner is avoided, and the product quality is improved; subsequent water gap trimming procedures are not needed, production cost is reduced, and the production period is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an automatic ejection mechanism for a flow channel in a slider of an injection mold. Background Art

[0002] For injection molded products, the latent glue port is a frequently used glue injection method during the mold design process. When the latent glue port needs to be placed inside the slider, such as in a two-color mold, it is easy for the runner and the glue port to separate during demolding and abnormal conditions to occur. At present, there is no good method to detach the glue port. Generally, after detachment, the subsequent manual trimming process of the product glue port is still required, which can easily lead to product scrapping. After trimming, obvious trimming marks will be left, reducing the product appearance quality, and at the same time, it will extend the production cycle, increase production costs, and reduce product output.

[0003] For example, the patent CN207522986U discloses a straight-top inclined slider side core-pulling mechanism for an injection mold, comprising an upper and lower double plate, a cavity is arranged under the upper double plate, a mold foot is arranged on the lower double plate, an upper and lower ejector plate and an ejector are arranged on the lower double plate between the mold feet, a pad is arranged on the mold foot, a core is arranged on the pad, an injection-molded plastic part is arranged between the core and the cavity, a barb is formed under the plastic part, and retaining ribs are respectively formed on the front and rear sides of the barb, straight ejector rods are arranged on the upper and lower ejector plates, and a mounting hole is opened in the core. A slider seat is arranged in the mounting hole, an inclined slider seat is formed on the slider, a slide groove is formed on one side of the inclined slider seat, a through hole is opened in the inclined slider seat, a guide push block is arranged in the through hole, a straight ejector rod passes through the slider seat and is fixed to the guide push block, an inclined slider is arranged on one side of the inclined slider seat, an upper portion of the inclined slider cooperates with a barb of a plastic part, a slide rail is formed on one side of the inclined slider, the slide rail cooperates with the slide groove, a socket is opened in the inclined slider, and the socket is connected with the guide push block; its traditional ejection structure cannot be applied to a mold structure in which a glue port is arranged in the slider. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an automatic ejection mechanism for the flow channel in a slider of an injection mold, so as to achieve the purpose of convenient ejection of the water outlet in the slider of the mold.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The injection mold slider has an automatic ejection mechanism for the flow channel. The top of the mold slider is provided with a water inlet for glue injection. The mold slider is provided with a movable ejector rod structure corresponding to the water inlet. The lower part of the mold slider is provided with an ejector drive structure corresponding to the lower end of the ejector rod structure.

[0007] Further:

[0008] The mold slider is a slider structure which is arranged in the movable mold of the mold and can move laterally.

[0009] A nozzle top block is arranged in the nozzle, and the nozzle top block is connected to the top of the ejector rod structure.

[0010] The ejector rod structure comprises a pressing block and a pair of inserting pins arranged side by side, and the lower ends of the pair of inserting pins are both arranged on the pressing block.

[0011] The ejector rod structure includes a single connecting rod for the ejector outlet structure. A driving block is provided at the bottom of the mold slider. The lower ends of the driving block and the connecting rod are both provided with corresponding inclined structures.

[0012] The top of the mold slide block is provided with a connected glue inlet point and a flow channel, and one side of the nozzle top block is arranged to fit and correspond to the flow channel.

[0013] The nozzle top block is detachably connected to the top end of the ejector rod via a fastener.

[0014] The mold slider is provided with two stepped holes corresponding to a pair of inlay pins, each stepped hole is provided with a spring sleeved on the outside of the inlay pin, a pressure block is fixed in the groove at the bottom of the mold slider, a top hole is provided on the pressure block corresponding to the lower end of the inlay pin, and a pair of ejector pin structures are provided under the mold slider which can be aligned with the two top holes after the slider moves horizontally.

[0015] The driving block is a wear-resistant block fixed on the mold base.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The automatic ejection mechanism of the flow channel in the injection mold slider is reasonably designed, the ejection of the water outlet in the mold slider is simple, the automatic ejection of the water outlet is realized, and the appearance quality of the product is improved; the abnormality of the artificial separation flow channel is avoided, and the product quality is improved; there is no need for the subsequent water outlet trimming process, which reduces the production cost and shortens the production cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 The figure is a schematic diagram of a structure in which two pins are arranged in the slider of the present invention.

[0020] Figure 2 This is a schematic diagram of an independent ejector structure provided in a slider according to the present invention. DETAILED DESCRIPTION

[0021] The specific implementation modes of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0022] like Figure 1 and Figure 2As shown, the automatic ejection mechanism of the flow channel in the injection mold slider corresponds to the water inlet setting of the injection mold, solving the problem of difficulty in ejecting the water inlet in the mold slider.

[0023] A sprue for glue inlet and injection molding is provided on the top of the mold slider, and a runner for injection molding is provided on the top of the mold slider; a movable ejector rod structure is provided in the mold slider corresponding to the sprue, and an ejector drive structure is provided at the lower end of the ejector rod structure corresponding to the lower part of the mold slider; the mold slider moves, driving the ejector drive structure to move, and the ejector rod is driven upward by the ejector drive structure to eject the sprue structure, thereby avoiding abnormalities in the artificial separation runner, improving product quality, and operating efficiently, which can provide production rhythm.

[0024] The mold slider of the injection mold is a slider structure that is arranged in the movable mold of the mold and can move laterally. The slider structure moves laterally and drives the ejector rod to move up and down through the driving structure. The integrated arrangement has a compact structure. There is no need to set up a separate driving structure, and the cost is relatively low.

[0025] Furthermore, a nozzle top block is provided in the nozzle, and the nozzle top block is connected to the top of the ejector rod structure. The nozzle top block is a contoured structure of the nozzle structure, and the two structures have the same shape. The nozzle structure is evenly stressed during ejection, and the ejection separation is efficient, which effectively ensures product quality. There is no need for subsequent nozzle trimming procedures, which reduces production costs and shortens the production cycle.

[0026] like Figure 1 As shown, an example: the ejector rod structure includes a pressing block and a pair of inserting pins arranged side by side, the pair of inserting pins have the same structure, are vertically arranged at intervals, are replaceable, and have relatively low cost; the lower ends of the pair of inserting pins are both arranged on the pressing block, and the synchronous ejection is stable and reliable.

[0027] The mold slider is set corresponding to the rear mold core, and the module slider can move laterally; a glue inlet point, a runner and a sprue are set on the top of the mold slider; a sprue top block is set corresponding to the sprue on the top of the slider, and the lower part of the sprue top block is connected to the top of a pair of inlay pins, the sprue top block is driven by a pair of inlay pins, and then the sprue structure is ejected by the sprue top block, and a pair of inlay pins are set at both ends of the lower part of the sprue top block, so the force is stable and reliable.

[0028] The insert pin is a cylindrical rod structure. Two stepped holes are provided in the mold slider corresponding to a pair of insert pins. The stepped holes have a stepped hole structure with a small inner diameter of the upper hole and a large inner diameter of the lower hole. A spring is provided in each stepped hole and is sleeved outside the insert pin. The spring is used to reset the insert pin.

[0029] A groove is provided on the top of the mold slide, and the pressing block is fixed in the groove of the mold slide by bolts. The two insert pins are positioned by the pressing block, and the structure is compact.

[0030] A top hole is provided on the pressing block corresponding to the lower end of the setting pin. The top hole on the pressing block is a vertically arranged through hole, and the inner diameter of the top hole is smaller than the outer diameter of the lower end of the setting pin. Furthermore, an end head is provided at the lower end of the setting pin, and the outer diameter of the end head is smaller than the inner diameter of the top hole. The lower end of the spring is positioned by the end head. When the setting pin moves upward, the end head squeezes the spring to compress it, and the spring compression is used for the subsequent reset of the ejection structure.

[0031] The lower ends of the two nozzle needles are equipped with springs to ensure uniform force; a threaded hole is provided in the middle of the groove, and a fixing hole is provided on the pressure block between the two vertical through holes. Bolts pass through the fixing hole and cooperate with the threaded hole. The structure is detachable and easy to assemble.

[0032] A pair of ejector pin structures are provided under the mold slider, which can be aligned with the two ejector holes after the slider moves horizontally; specifically, the pair of ejector pins are fixed on the ejector pin plate, and a traditional ejector pin structure can be adopted; the spacing between the pair of ejector pins is equal to the spacing between the pair of inlay pins; when the mold slider moves out horizontally, the pair of inlay pins and the pair of ejector pins are aligned up and down, and the ejection is stable and reliable.

[0033] The present invention cleverly avoids interference between the slider and the ejector pin. Two movable inserting pins are made on the slider and fixed on the slider by a pressing block. The two pins can move with the slider. A set of ejector pins specially matched with the ejection device in the slider is designed to ensure that the inserting pins are coaxial with the matching ejector pins. When the mold is opened, after the slider retreats, the ejector pins are used to push the inserting pins on the slider to start ejecting the runner and reset under the elastic force of the spring.

[0034] like Figure 2 As shown in the figure, another example: this ejection structure is a single ejector structure, the top of the mold slider is provided with a connecting glue inlet point and a flow channel, and one side of the nozzle top block is arranged correspondingly to the flow channel. There is no need for subsequent nozzle trimming process, which reduces production costs and shortens production cycle.

[0035] The ejector rod structure includes a single connecting rod for ejecting the water outlet structure. A vertical through hole is provided in the mold slider. The connecting rod is movably arranged in the through hole. The connecting rod can move up and down, and the structure is simple. The water outlet ejector block is fixedly connected to the top of the connecting rod. A driving block is provided at the bottom of the mold slider. The driving block and the lower end of the connecting rod are provided with corresponding inclined structures. When the mold slider moves, the connecting rod is pushed upward through the inclined surface, thereby realizing automatic ejection of the water outlet and improving the appearance quality of the product.

[0036] The mold slide block is arranged corresponding to the rear mold core, and the module slide block can move laterally; the nozzle top block is detachably connected to the top end of the ejector rod through a fastener, and the assembly is simple.

[0037] A step hole is provided in the mold slider corresponding to the connecting rod. The step hole is a step hole structure with a small inner diameter of the upper hole and a large inner diameter of the lower hole, and the spring is arranged in the lower hole; a pressure block is provided at the lower end of the mold slider corresponding to the step hole, and a convex ring structure is provided on the connecting rod. The convex ring structure is located above the pressure block, and the lower end of the spring is positioned by the convex ring structure, and a meson is provided at the corresponding upper end of the spring; the connecting rod moves upward, and the spring is compressed, and the compressed spring is used to reset the ejection structure.

[0038] The driving block is a wear-resistant block fixed on the mold base. The inner end of the wear-resistant block is provided with a driving bevel, and the lower end of the connecting rod is provided with a bevel structure corresponding to the driving bevel. When the mold slider moves out laterally, the connecting rod and the slider move horizontally synchronously, and the bevel structure at the lower end of the connecting rod contacts the driving bevel structure to drive the connecting rod to move upward, thereby driving the nozzle ejector block to be ejected.

[0039] Furthermore, a wear-resistant sliding rod is provided at the lower end of the connecting rod, and an inclined surface structure corresponding to the driving inclined surface is provided at the end of the sliding rod, so that the operation is stable and reliable.

[0040] A movable connecting rod is made on the slider. The bottom inclined surface of the connecting rod contacts the wear-resistant plate at the bottom of the slider, and the top is connected to the water outlet top block. The movement of the slider itself is used to provide power. When the slider moves, the bottom surface of the connecting rod changes direction under the action of the inclined surface, and is pushed upward, pushing the water outlet through the top block, and is reset by the action of the spring.

[0041] The automatic ejection mechanism of the flow channel in the slider of the injection mold of the present invention is reasonably designed, the ejection of the water outlet in the mold slider is simple, the automatic ejection of the water outlet is realized, and the appearance quality of the product is improved; the abnormality of artificial separation of the flow channel is avoided, and the product quality is improved; there is no need for a subsequent water outlet trimming process, which reduces the production cost and shortens the production cycle.

[0042] The above is only an explanation of the preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0043] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An automatic ejection mechanism for the flow channel in an injection mold slider, wherein the top of the mold slider is provided with a water inlet for injection molding, characterized in that: An ejector rod structure that can be movably ejected is arranged in the mold slider corresponding to the water inlet, and an ejector driving structure is arranged at the lower end of the ejector rod structure corresponding to the lower part of the mold slider.

2. The automatic ejection mechanism for the inner flow channel of the injection mold slider according to claim 1, characterized in that: The mold slider is a slider structure which is arranged in the movable mold of the mold and can move laterally.

3. The automatic ejection mechanism for the inner flow channel of the injection mold slider according to claim 1, characterized in that: A nozzle top block is arranged in the nozzle, and the nozzle top block is connected to the top of the ejector rod structure.

4. The automatic ejection mechanism for the inner flow channel of the injection mold slider according to claim 1, characterized in that: The ejector rod structure comprises a pressing block and a pair of inserting pins arranged side by side, and the lower ends of the pair of inserting pins are both arranged on the pressing block.

5. The automatic ejection mechanism for the inner flow channel of the injection mold slider according to claim 1, characterized in that: The ejector rod structure includes a single connecting rod for the ejector outlet structure. A driving block is provided at the bottom of the mold slider. The lower ends of the driving block and the connecting rod are both provided with corresponding inclined structures.

6. The automatic ejection mechanism for the inner flow channel of the injection mold slider as claimed in claim 3, characterized in that: The top of the mold slide block is provided with a connected glue inlet point and a flow channel, and one side of the nozzle top block is arranged to fit and correspond to the flow channel.

7. The automatic ejection mechanism for the inner flow channel of the injection mold slider as claimed in claim 3, characterized in that: The nozzle top block is detachably connected to the top end of the ejector rod via a fastener.

8. The automatic ejection mechanism for the inner flow channel of the injection mold slider as claimed in claim 4, characterized in that: The mold slider is provided with two stepped holes corresponding to a pair of inlay pins, each stepped hole is provided with a spring sleeved on the outside of the inlay pin, a pressure block is fixed in the groove at the bottom of the mold slider, a top hole is provided on the pressure block corresponding to the lower end of the inlay pin, and a pair of ejector pin structures are provided under the mold slider which can be aligned with the two top holes after the slider moves horizontally.

9. The automatic ejection mechanism for the inner flow channel of the injection mold slider as claimed in claim 5, characterized in that: The driving block is a wear-resistant block fixed on the mold base.

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