Multi-stage demolding injection mold

Abstract

The utility model provides a kind of multistage demolding injection mold, through injection upper die and injection lower die abutment or separate, realize product injection molding, through the vertical direction activity of demolding forming assembly relative to first forming piece, through the step-by-step, multistage step of demolding forming assembly, realize the gradual demolding to product, reduce the stress concentration that product is subjected to in demolding process, avoid product deformation or damage, solve the existing spray mist point class product injection demolding difficulty, cannot guarantee product quality problem.

Description

[Technical Field]

[0002] This utility model relates to the field of injection mold technology, and in particular to multi-stage demolding injection molds. [Background Technology]

[0004] Currently, spray-on products face many challenges during injection molding demolding due to their unique shape and size.

[0005] During injection molding, spray-on products, due to their special shape and size, generate significant clamping forces and adhere to the mold surface due to surface tension. During demolding, the product is not only affected by the clamping forces but also by the pulling force from the injection point, leading to uneven stress and potentially causing deformation or damage. Furthermore, because spray-on products are small, the force of the demolding mechanism may cause them to splash in different directions, increasing the difficulty of collection and potentially posing safety hazards to the production environment and operators. [Utility Model Content]

[0007] The purpose of this invention is to provide a multi-stage demolding injection mold to solve the problem of difficult demolding of existing spray-type products, which makes it impossible to guarantee product quality.

[0008] A multi-stage demolding injection mold includes an upper injection mold for molding and a lower injection mold that abuts against or separates from the upper injection mold. The lower injection mold includes a first molding part connected to a gating channel and a demolding molding component that moves vertically relative to the first molding part.

[0009] As described above, in a multi-stage ejector injection mold, the ejector molding assembly includes a movable ejector pin for contacting or separating from the upper injection mold and a movable ejector tube that moves vertically relative to the movable ejector pin.

[0010] In the multi-stage demolding injection mold described above, when the movable ejector pin abuts against the upper injection mold, the first molded part, the movable ejector pin, the movable ejector tube, and the upper injection mold form an injection cavity for molding.

[0011] In the multi-stage ejector injection mold described above, when the movable ejector pin separates from the upper injection mold, the movable ejector pin and the movable ejector tube move vertically relative to the first molded part, and the movable ejector tube moves vertically relative to the movable ejector pin.

[0012] In the multi-stage ejector injection mold described above, the movable ejector pin is provided with a molding block for forming and abutting against the upper injection mold.

[0013] In the multi-stage demolding injection mold described above, the molding block is provided with molding protrusions for molding.

[0014] As described above, in a multi-stage demolding injection mold, the molding block is further provided with molding grooves for molding.

[0015] As described above, in a multi-stage demolding injection mold, the upper injection mold includes a second molding component for molding, a third molding component connected to the second molding component, and a fourth molding component connected to the third molding component.

[0016] In the multi-stage demolding injection mold described above, the second molded part abuts against or separates from the first molded part, and the fourth molded part abuts against or separates from the movable ejector pin.

[0017] In the multi-stage ejector injection mold described above, the fourth molding part is provided with a molding protrusion for molding and abutting against the movable ejector pin.

[0018] This invention proposes a multi-stage demolding injection mold. An upper and lower injection mold abut against each other to form an injection cavity. A gating system connects to a first molded part, allowing injection material to be injected into the cavity, thus achieving product injection molding. The upper and lower injection molds separate, and the demolding assembly moves vertically relative to the first molded part, achieving product demolding and improving product quality and production efficiency. Secondly, the step-by-step, multi-stage action of the demolding assembly enables gradual demolding of the product, reducing stress concentration during demolding and preventing product deformation or damage.

[0019] This utility model relates to a multi-stage demolding injection mold. By abutting or separating the upper and lower injection molds, the product is injection molded. Through the vertical movement of the demolding component relative to the first molded part, and the step-by-step, multi-stage process of the demolding component, the product is gradually demolded, reducing stress concentration on the product during demolding and preventing product deformation or damage. This solves the problem of difficult demolding of existing spray-on products and the inability to guarantee product quality. [Attached Image Description]

[0021] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This utility model describes the disassembly of the upper and lower injection molds. Figure 1 ;

[0024] Figure 4 This utility model describes the disassembly of the upper and lower injection molds. Figure 2 ;

[0025] Figure 5 This is a schematic diagram of the structure of the movable ejector pin of this utility model;

[0026] Figure 6 This is a structural schematic diagram of the fourth molded part of this utility model.

Detailed Implementation Methods

[0028] The following is in conjunction with the appendix Figure 1-6 The present invention will be further described in detail with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0029] Figure 1-6 The multi-stage demolding injection mold shown includes an upper injection mold 1 for molding and a lower injection mold 2 that abuts against or separates from the upper injection mold 1. The lower injection mold 2 includes a first molding part 21 connected to the gating channel 3 and a demolding molding component 22 that moves vertically relative to the first molding part 21.

[0030] In this embodiment, the upper and lower injection molds abut to form an injection cavity. Molten injection material is injected into the first molded part through the gating channel to achieve product injection molding. The upper and lower injection molds separate, and the demolding assembly moves in steps and multiple stages relative to the first molded part in the vertical direction to achieve gradual demolding of the product. This reduces stress concentration on the product during demolding, avoids product deformation or damage, and thus improves product quality and production efficiency.

[0031] Furthermore, the demolding assembly 22 includes a movable ejector pin 221 for contacting or separating from the upper injection mold 1 and a movable ejector tube 222 that moves vertically relative to the movable ejector pin 221.

[0032] In this implementation, the product molding and demolding functions are achieved through the contact or separation between the demolding component and the upper injection mold. Initial demolding is performed by the relative movement of the first molded part and the demolding component, which breaks the partial connection between the product and the mold, preparing for subsequent multi-stage demolding. Furthermore, the product demolding is achieved through the step-by-step, multi-stage demolding process by the relative movement of the movable ejector pin and the movable ejector tube.

[0033] Furthermore, when the movable ejector pin 221 abuts against the upper injection mold 1, the first molding part 21, the movable ejector pin 221, the movable ejector tube 222 and the upper injection mold 1 form an injection cavity 4 for molding.

[0034] In this implementation, when the upper and lower injection molds are in the closed state, the movable ejector pin abuts against the upper injection mold. The first molded part, the movable ejector pin, the movable ejector tube, and the upper injection mold together form the injection cavity. Injection material is injected into the injection cavity through the gating system to achieve product molding. Furthermore, the cooperation of multiple components reduces molding defects caused by errors in a single component, improves product quality, and enhances the structural integrity and reliability of the cavity.

[0035] Furthermore, when the movable ejector pin 221 separates from the upper injection mold 1, the movable ejector pin 221 and the movable ejector tube 222 move vertically relative to the first molded part 21, and the movable ejector tube 222 moves vertically relative to the movable ejector pin 221.

[0036] In this implementation, when the upper and lower injection molds are in the open state, the movable ejector pin separates from the upper injection mold, releasing the product from the mold and preparing for subsequent demolding. Simultaneously, the movable ejector pin and the movable ejector tube move upwards relative to the first molded part, ejecting the product and separating it from the first molded part, achieving primary demolding. After primary demolding, the movable ejector tube continues to move upwards relative to the movable ejector pin, separating the product from the ejector pin, achieving secondary demolding, allowing the product to fall naturally under its own weight. Through step-by-step, multi-stage demolding, stress concentration on the product during demolding is reduced, preventing product deformation or damage. Simultaneously, it prevents the product from flying around during demolding, reducing the problem of the product falling onto the parting surface and pressing against the mold, achieving an efficient and high-quality demolding process.

[0037] Furthermore, the movable ejector pin 221 is provided with a molding block 2211 for molding and abutting against the upper injection mold 1.

[0038] In this implementation, by optimizing the structure of the movable ejector pin and setting a molding block on it, the movable ejector pin can both participate in product molding and demolding, achieving a dual function of product molding and demolding. Secondly, by designing the molding block structure, precise control of the product structure is achieved, ensuring the accuracy of the product's shape and dimensions.

[0039] Furthermore, the molding block 2211 is provided with molding protrusions 2212 for molding.

[0040] Furthermore, the molding block 2211 is also provided with a molding groove 2213 for molding.

[0041] Furthermore, the movable ejector pin 221 is also provided with a second spiral exhaust channel 2214 for exhausting gas.

[0042] Furthermore, the injection mold 1 includes a second molding component 11 for molding, a third molding component 12 connected to the second molding component 11, and a fourth molding component 13 connected to the third molding component 12.

[0043] In this embodiment, the third molded part 12 is provided with a first spiral exhaust channel for exhaust (e.g., Figure 4 (As shown).

[0044] Furthermore, the second molding component 11 abuts against or separates from the first molding component 21, and the fourth molding component 13 abuts against or separates from the movable ejector pin 221.

[0045] In this implementation, during mold closing, the second molding component abuts against the first molding component to achieve external product molding; the fourth molding component abuts against the movable ejector pin to achieve internal product molding. During mold opening, the second molding component separates from the first molding component, and the fourth molding component separates from the movable ejector pin, releasing the molded product from the mold and preparing for subsequent demolding.

[0046] Furthermore, the fourth molding component 13 is provided with a molding protrusion 131 for molding and abutting against the movable ejector pin 221.

[0047] In this implementation, by setting molding protrusions on the fourth molding part, the fourth molding part can accurately abut against the movable ejector pin, forming a complex structure of the product and improving the product's diversity and application range.

[0048] When using this implementation:

[0049] When the upper injection mold 1 and the lower injection mold 2 are in the closed state, the movable ejector pin 221 abuts against the upper injection mold 1, and the injection material enters the injection cavity through the injection point 31 of the gating channel 3. After the material cools, the product is formed.

[0050] When the upper injection mold 1 and the lower injection mold 2 are in the open state, the movable ejector pin 221 separates from the upper injection mold 1, releasing the molded product from the upper injection mold 1; the movable ejector pin 221 and the movable ejector tube 222 move upward relative to the first molded part 21 at the same time, ejecting the molded product and separating it from the first molded part 21; after one demolding, the movable ejector tube 222 continues to move upward relative to the movable ejector pin 221, separating the molded product from the movable ejector pin 221, allowing it to fall naturally under its own weight and be collected by air blowing.

[0051] This utility model relates to a multi-stage demolding injection mold. By abutting or separating the upper and lower injection molds, the product is injection molded. Through the vertical movement of the demolding component relative to the first molded part, and the step-by-step, multi-stage process of the demolding component, the product is gradually demolded, reducing stress concentration on the product during demolding and preventing product deformation or damage. This solves the problem of difficult demolding of existing spray-on products and the inability to guarantee product quality.

[0052] The above description is a specific implementation method provided, and it is not intended to imply that the specific implementation of this utility model is limited to these descriptions. Any technical deductions, substitutions, or improvements made based on this utility model solution that are similar to or similar to this utility model solution should be considered within the scope of protection of this patent.

Claims

1. A multi-stage demolding injection mold, comprising an upper injection mold (1) for molding and a lower injection mold (2) that abuts against or separates from the upper injection mold (1), characterized in that: The injection mold (2) includes a first molding part (21) connected to the gating channel (3) and a demolding molding component (22) that moves vertically relative to the first molding part (21).

2. The multi-stage demolding injection mold according to claim 1, characterized in that: The demolding assembly (22) includes a movable ejector pin (221) for contacting or separating from the upper injection mold (1) and a movable ejector tube (222) that moves vertically relative to the movable ejector pin (221).

3. The multi-stage demolding injection mold according to claim 2, characterized in that: When the movable ejector pin (221) abuts against the upper injection mold (1), the first molding part (21), the movable ejector pin (221), the movable ejector tube (222), and the upper injection mold (1) form an injection cavity (4) for molding.

4. The multi-stage demolding injection mold according to claim 3, characterized in that: When the movable ejector pin (221) separates from the upper injection mold (1), the movable ejector pin (221) and the movable ejector tube (222) move vertically relative to the first molded part (21), and the movable ejector tube (222) moves vertically relative to the movable ejector pin (221).

5. The multi-stage demolding injection mold according to claim 2, characterized in that: The movable ejector pin (221) is provided with a molding block (2211) for molding and abutting against the upper injection mold (1).

6. The multi-stage demolding injection mold according to claim 5, characterized in that: The molding block (2211) is provided with molding protrusions (2212) for molding.

7. The multi-stage demolding injection mold according to claim 6, characterized in that: The molding block (2211) is also provided with molding grooves (2213) for molding.

8. The multi-stage demolding injection mold according to claim 2, characterized in that: The injection mold (1) includes a second molding part (11) for molding, a third molding part (12) connected to the second molding part (11), and a fourth molding part (13) connected to the third molding part (12).

9. The multi-stage demolding injection mold according to claim 8, characterized in that: The second molding part (11) abuts or separates from the first molding part (21), and the fourth molding part (13) abuts or separates from the movable ejector pin (221).

10. The multi-stage demolding injection mold according to claim 9, characterized in that: The fourth molding part (13) is provided with a molding protrusion (131) for molding and abutting against the movable ejector pin (221).

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