Sliding block ejection device of plastic mould

Abstract

The plastic mold sliding block ejection device comprises a female mold and a male mold, the female mold is fixedly provided with a sliding block shifting rod, a sliding block bundling block and an ejection guide path, and the sliding block shifting rod inclines in the direction away from a product; the male mold is provided with a side core-pulling slide block assembly, an ejection sleeve assembly and a forming slide block assembly, the core needle slide block assembly and the forming slide block assembly are fixedly connected and are arranged on the male mold in a sliding manner, the ejection sleeve assembly is arranged between the core needle slide block assembly and the forming slide block assembly, and the ejection sleeve assembly is arranged on the forming slide block assembly in a sliding manner; when the mold is opened after injection molding, the guide path pushes the ejection sleeve assembly, and the ejection sleeve gradually ejects towards the glue position surface, so that adhesion formed by the threaded column or the supporting rib to the core needle and the molding sliding block assembly in the molding process is separated in advance, and the force borne by a product in the mold opening movement process is reduced or eliminated.

Description

[Technical Field]

[0001] This invention relates to the field of injection molding mold technology, and in particular to a plastic mold slider ejection device. [Background Technology]

[0002] With the increasing demand for diverse functions in modern industrial products, the internal structural design of these products is becoming increasingly complex, often containing numerous threaded pillars or supporting ribs. This places higher demands on their manufacturing processes. Slider molding is a common mold design approach in injection molding, used when products have complex shapes that are difficult to detach from the mold. However, when the product's internal structure contains many threaded pillars or supporting ribs, these pillars or ribs can adhere to the slider assembly during the molding process. This adhesion or friction can generate strong adhesive or frictional forces in the adhesion area. When the slider is detached after product molding, these adhesive or frictional forces can prevent the slider assembly from smoothly separating from the product. This resistance can also cause product deformation or damage to mold components, thereby reducing production yield and increasing production costs. [Summary of the Invention]

[0003] The technical problem to be solved by this invention is that in the case of a product with many threaded pillars or support ribs in the internal structure of the slider molding process, the threaded pillars or support ribs will form a coating and adhesion to the slider assembly during the molding process, and will generate strong adhesive or frictional forces in the coated area. When the slider is detached after the product is molded, the adhesive or frictional forces will prevent the slider assembly from detaching smoothly from the product, and this resistance will cause the product to deform or cause damage to the mold components, thereby reducing the production yield and increasing the production cost.

[0004] The solution to the technical problem of this invention is: a plastic mold slider ejection device includes a male mold, a female mold, an ejection guide path, a side-pull mechanism, and an ejection sleeve assembly;

[0005] The ejector sleeve assembly includes a slider push rod, an ejector sleeve, a sleeve fixing assembly, and a return spring. The sleeve fixing assembly is slidably disposed inside the side-pull mechanism. The sleeve fixing assembly clamps and fixes one end of the ejector sleeve. The other end of the ejector sleeve extends through the side-pull mechanism to the glue surface, and the ejector sleeve is slidably connected inside the side-pull mechanism. One end of the slider push rod is fixedly connected to the sleeve fixing assembly, and the guide end of the other end extends to the ejection guide path in a direction away from the product, so that its end face fits against the ejection guide path. The return spring is disposed inside the side-pull mechanism, and one end of the return spring abuts against the end face of the sleeve fixing assembly near the product.

[0006] The ejection guide path is set on the female mold. The ejection guide path includes an ejection stroke section, an ejection holding section, and a return stroke section, which are arranged in sequence. When the mold is opened, the ejection stroke section and the ejection holding section are slidably connected to the guide end face of the slider rod. When the mold is closed, the return stroke section and the ejection stroke section are slidably connected to the guide end face of the slider rod.

[0007] Preferably, the side-pulling mechanism includes a side-pulling slider assembly and a forming slider assembly, which are sequentially slidably disposed on the male mold and fixedly connected. The female mold is also fixedly provided with a slider lever, one end of which is fixed to the female mold, and the other end of which passes through and is slidably connected to the side-pulling slider assembly.

[0008] Preferably, the side-pulling slider assembly includes a core needle, one end of which is fixedly connected to the side-pulling mechanism, and the other end of which passes sequentially through the side-pulling mechanism and the ejector sleeve to the adhesive surface.

[0009] Preferably, the ejection stroke section and the ejection holding section are located on the side close to the side-pulling mechanism; the female mold is fixedly provided with a slider bundle, and the retraction stroke section is located on the side of the slider bundle close to the side-pulling slider assembly.

[0010] Preferably, a sliding groove and a spring placement groove are provided between the side core-pulling slider assembly and the forming slider assembly, the sliding groove is slidably connected to the sleeve fixing assembly, and the spring placement groove is provided with a return spring.

[0011] The beneficial effect of the present invention is that, through the plastic mold slider ejection device of the present invention, a sleeve ejection is added during the slider detachment process after the product is molded, so as to pre-detach the threaded column or support rib from the slider assembly that will be adhered to during the molding process, thereby reducing or eliminating the adhesive force or friction force borne by the slider during the detachment movement, thereby avoiding product deformation or damage to mold components, and thus improving production yield and reducing production costs. [Attached Image Description]

[0012] Figure 1 This is a schematic diagram of the threaded column and support rib structure of the product.

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the mold in its closed state.

[0014] Figure 3 This is a schematic diagram of the cross-sectional structure of the side core-pulling slider assembly and the forming slider assembly.

[0015] Figure 4 for Figure 3Enlarged view of a portion of region A in the middle.

[0016] Figure 5 This is a schematic diagram of the cross-sectional structure of the ejector guide path and the ejector sleeve assembly.

Detailed Implementation Methods

[0017] To further illustrate the technical means and effects of the present invention, the following detailed description is provided in conjunction with the embodiments of the present invention and their accompanying drawings.

[0018] This invention is applied to the process of slider detaching from complex structural products during slider forming, such as... Figure 1 As shown, the threaded column 502 or the support rib 501 may stick to the slider assembly during the molding process.

[0019] Therefore, the present invention provides a plastic mold slider ejection device, such as... Figure 2 and Figure 3 The mold includes a female mold and a male mold. The female mold has a female template 101, on which a slider lever 103 and a slider bundle 102 are fixedly mounted. One end of the slider lever 103 is fixedly mounted on the female template 101, and the other end is tilted away from the product. The male mold has a male template 104, on which a side-pulling mechanism 200 is slidably mounted. The side-pulling mechanism 200 includes a side-pulling slider assembly 201. The slider lever 103 is slidably connected inside the side-pulling slider assembly 201. When the mold is opened and closed, the slider lever 103 passes through the side-pulling slider assembly 201, thereby pushing and guiding the side-pulling mechanism 200 on the male template 104.

[0020] like Figure 3 and Figure 4 As shown, the molding slider assembly 400 is fixedly disposed on the side of the side-pull mechanism 200 near the product. The side-pull mechanism 200 includes a core needle 202. One end of the core needle 202 is fixedly connected to the side-pull core slider assembly 201, and the other end of the core needle 202 passes through the ejector sleeve 301 and the molding slider assembly 400 in sequence to the glue surface.

[0021] like Figure 3 , Figure 4 and Figure 5As shown, the ejector sleeve assembly 300 includes: an ejector sleeve 301, a sleeve clamping assembly 302, a slider push rod 304, and a return spring 305. The ejector sleeve assembly 300 is disposed between the side-pulling mechanism 200 and the forming slider assembly 400 and is slidably connected to the forming slider assembly 400 by a guide post (not shown). The sleeve clamping assembly 302 clamps and fixes one end of the ejector sleeve 301, and the other end of the ejector sleeve 301 passes through and is slidably connected to the forming slider assembly 400. One end of the slider push rod 304 is fixedly connected to the sleeve clamping assembly 302, and the guide end face of the other end of the slider push rod 304 penetrates the side-pulling mechanism 200 and extends to the ejection guide path 110, so that the slider push rod 304 is guided... The end face is slidably connected to the ejection guide path 110; the return spring 305 is set in the spring placement groove of the forming slider assembly 400, and the two ends of the return spring 305 respectively abut against the sleeve clamping assembly 302 and the forming slider assembly 400. A sliding groove 303 is left between the sleeve clamping assembly 302 and the forming slider assembly 400, and the return spring 305 provides a return abutment force so that the guide end face of the slider ejector rod 304 always maintains a sliding connection with the ejection guide path 110 during the mold opening and closing process. During the mold opening process, the guide path 110 controls the displacement of the ejection sleeve assembly 300, driving the ejection sleeve 301 to pass through the forming slider assembly 400, so that the product is separated from the core pin 202 and the forming slider assembly 400.

[0022] like Figure 2 and Figure 5As shown, the ejection guide path 110 is composed of an ejection stroke section 111, an ejection holding section 112, and a return stroke section 113 arranged in sequence. The ejection stroke section 111 and the ejection holding section 112 are located on the mother mold 101, and the return stroke section 113 is located on the slider assembly 102. During the mold opening process, the side pulling mechanism 200 pulls outward, driving the ejection sleeve assembly 300 inside it. This causes the guide end face of the slider push rod 304 to continuously move under the action of the ejection stroke section 111, gradually compressing the return spring 305. At the same time, the ejection sleeve 301 gradually pushes outward toward the glue surface, causing the product to gradually separate from the core pin 202 and the forming slider assembly 400. When the guide end face of the ejector pin 304 contacts the ejection retaining section 112, the ejector sleeve 301 is fully ejected, allowing the product to completely detach from the core pin 202 and the molding slider assembly 400. When the guide end face of the slider ejector pin 304 contacts the ejection retraction stroke section 113, the return spring 305 is gradually released, and the ejector sleeve 301 gradually retracts to its original position, preventing the product from being scratched by the ejector sleeve 301 during the falling process. During mold closing, the retraction stroke section 113 first contacts the guide end of the slider ejector pin 304, thereby pressing the slider ejector pin 304 back until the ejection retaining section 112 is fully pressed back. Subsequently, when the guide end face of the slider ejector pin 304 contacts the ejection stroke section 111, the slider ejector pin 304 slowly returns to its original position under the action of the return spring 305. When the mold is fully closed, the end of the ejector sleeve 301 closest to the product is flush with the glue surface.

[0023] The working process of this invention is as follows: when the mold is opened after injection molding, the guide path 110 pushes the ejector sleeve assembly 300, and the ejector sleeve 301 is gradually ejected towards the glue surface, so as to pre-detach the adhesion formed by the threaded column 502 or the support rib 501 to the core pin 202 and the molding slider assembly 400 during the molding process, so as to reduce or eliminate the force borne by the product during the mold opening movement.

[0024] It should be noted that the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments based on the technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims

1. A plastic mold slider ejection device, characterized in that, This includes the male mold, female mold, ejection guide path, side ejection mechanism, and ejection sleeve assembly; The ejector sleeve assembly includes a slider push rod, an ejector sleeve, a sleeve fixing assembly, and a return spring. The sleeve fixing assembly is slidably disposed inside the side-pull mechanism. The sleeve fixing assembly clamps and fixes one end of the ejector sleeve. The other end of the ejector sleeve extends through the side-pull mechanism to the glue surface, and the ejector sleeve is slidably connected inside the side-pull mechanism. One end of the slider push rod is fixedly connected to the sleeve fixing assembly, and the guide end of the other end extends to the ejection guide path in a direction away from the product, so that its end face fits against the ejection guide path. The return spring is disposed inside the side-pull mechanism, and one end of the return spring abuts against the end face of the sleeve fixing assembly near the product. The ejection guide path is set on the female mold. The ejection guide path includes an ejection stroke section, an ejection holding section, and a return stroke section, which are arranged in sequence. When the mold is opened, the ejection stroke section and the ejection holding section are slidably connected to the guide end face of the slider rod. When the mold is closed, the return stroke section and the ejection stroke section are slidably connected to the guide end face of the slider rod.

2. The plastic mold slider ejection device as described in claim 1, characterized in that: The side-pulling mechanism includes a side-pulling slider assembly and a forming slider assembly. The side-pulling slider assembly and the forming slider assembly are slidably disposed on the male mold in sequence, and the side-pulling slider assembly and the forming slider assembly are fixedly connected. The female mold is also fixedly provided with a slider lever. One end of the slider lever is fixed to the female mold, and the other end of the slider lever passes through and is slidably connected to the side-pulling slider assembly.

3. The plastic mold slider ejection device as described in claim 1, characterized in that: The side-pulling slider assembly includes a core needle, one end of which is fixedly connected to the side-pulling mechanism, and the other end of which passes sequentially through the side-pulling mechanism and the ejector sleeve to the adhesive surface.

4. The plastic mold slider ejection device as described in claim 1, characterized in that: The ejection stroke section and the ejection holding section are located on the side close to the side-pulling mechanism; the female mold is fixedly provided with a slider bundle, and the retraction stroke section is located on the side of the slider bundle close to the side-pulling slider assembly.

5. The plastic mold slider ejection device as described in claim 2, characterized in that: A sliding groove and a spring placement groove are provided between the side core-pulling slider assembly and the forming slider assembly. A sleeve fixing assembly is slidably connected in the sliding groove, and a reset spring is provided in the spring placement groove.

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