Strong demoulding and ejection device for products

Abstract

The present disclosure provides a strong demoulding and ejecting device for products. It comprises: a rear mold, at least one hole is provided on the rear mold, and the hole is used to give shape to the product; an insert pin, the insert pin passes through the rear mold, through the hole, and matches with the through hole on the product; an ejector pin, the ejector pin passes through the rear mold and is used to eject the product; the rear mold is also provided with a first limiting structure, and the insert pin is provided with a second limiting structure matching the first limiting structure, and the first limiting structure and the second limiting structure work together to limit the displacement of the insert pin along the direction perpendicular to the bottom surface of the rear mold. The strong demoulding and ejecting device for products provided by the present disclosure can improve the quality of molded plastic products, reduce production costs, enable plastic products to be ejected safely and completely, and ensure that the plastic products are not damaged by pulling.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile molds, and in particular to a strong demoulding and ejecting device for a product. Background Art

[0002] Injection molds are tools for producing plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and after cooling and solidification, a molded product with a specific size, shape, and function is obtained, and the molded product is taken out of the injection mold.

[0003] Generally, when the molded product is taken out of the mold, the forced demoulding and ejection of the undercut structure in the product hole will cause the product to deform. However, whether a single ejection mechanism or a multi-component ejection mechanism is used, the ejection action is completed at one time. In particular, the product hole structure is spherical, which cannot be demoulded normally / smoothly. After injection molding, the ejector pin does not eject the product smoothly, the product will be deformed, and the product hole will be partially higher than the bottom plane of the product after forced demoulding. This will cause a lot of defective products and a large number of missed defects to be left to the client, causing the customer's production line to be stuck and complain or claim. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a product strong demoulding and ejection device, which can improve the quality of molded plastic products, reduce production costs, enable plastic products to be ejected safely and completely, and ensure that plastic products are not damaged.

[0005] Based on the above purpose, the present disclosure provides a product strong demoulding ejection device, comprising:

[0006] A rear mold, wherein at least one hole is provided on the rear mold, and the hole is used to shape the product;

[0007] An insert pin, the insert pin passes through the rear mold, through the hole, and matches with the through hole on the product;

[0008] An ejector pin, which passes through the rear mold and is used to eject the product;

[0009] The rear mold is also provided with a first limiting structure, and the insert pin is provided with a second limiting structure matching the first limiting structure, and the first limiting structure and the second limiting structure work together to limit the displacement of the insert pin along a direction perpendicular to the bottom surface of the rear mold.

[0010] In the above-mentioned product strong demoulding and ejection device, preferably, the insert pins include a middle insert pin passing through the middle of the hole and a side insert pin passing through the edge of the hole;

[0011] When the ejector pin is ejected a first distance, the product is separated from the rear mold; when the ejector pin is ejected a second distance, the displacement of the side insert pin is limited so that it is separated from the product; when the ejector pin is ejected a third distance, the displacement of the middle insert pin is limited so that it is separated from the product.

[0012] In the above-mentioned product strong demoulding and ejection device, preferably, the insert pins are arranged in three rows in parallel.

[0013] In the above-mentioned product strong demoulding and ejection device, preferably, the first limiting structure includes a first limiting step and a second limiting step; the first limiting step limits the displacement of the side insert pins, and the second limiting step limits the displacement of the middle insert pins.

[0014] In the above-mentioned product strong demolding and ejection device, preferably, the first limiting step and the second limiting step are arranged on the rear mold, and in the direction perpendicular to the bottom surface of the rear mold, the first limiting step limits the displacement distance of the side inlay pin to be smaller than the second limiting step limits the displacement distance of the middle inlay pin.

[0015] In the above-mentioned product strong demoulding and ejection device, preferably, the second limiting structure includes a first limiting block and a second limiting block; the first limiting block limits the displacement of the side insert pins, and the second limiting block limits the displacement of the middle insert pins.

[0016] In the above-mentioned product strong demoulding and ejection device, preferably, the first limit block and the second limit block are respectively arranged on the side inlay pin and the middle inlay pin, and the first limit block limits the displacement distance of the side inlay pin to be smaller than the displacement distance of the middle inlay pin limited by the second limit block.

[0017] In the above-mentioned product strong demoulding and ejecting device, preferably, at least 12 ejector pins are provided through the rear mold.

[0018] In the above-mentioned product forced demoulding and ejection device, preferably, an end of the insert pin away from the bottom surface of the rear mold is provided with a snap-fit ​​structure, and the snap-fit ​​structure protrudes from the top surface of the rear mold.

[0019] In the above-mentioned product strong demoulding and ejecting device, preferably, the engaging structure is spherical or elliptical.

[0020] It can be seen from the above that the product strong demoulding and ejection device provided by the present disclosure can improve the quality of molded plastic products, reduce production costs, enable plastic products to be ejected safely and completely, and ensure that the plastic products are not damaged by pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the implementation methods or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only implementation methods of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a product strong demoulding and ejecting device according to an embodiment of the present disclosure;

[0023] Figure 2 It is a partial schematic diagram of a strong demoulding and ejecting device for a product according to an embodiment of the present disclosure;

[0024] Figure 3 It is a structural schematic diagram of the first ejection during the ejection process of the strong demoulding ejection device of the product according to the embodiment of the present disclosure;

[0025] Figure 4 It is a partial schematic diagram of the first ejection during the ejection process of the strong demoulding ejection device for products according to an embodiment of the present disclosure;

[0026] Figure 5 It is a schematic diagram of the arrangement of the insert pins and ejectors during the first ejection process of the strong demoulding ejection device of the product according to the embodiment of the present disclosure;

[0027] Figure 6 It is a structural schematic diagram of the second ejection during the ejection process of the strong demoulding ejection device of the product according to the embodiment of the present disclosure;

[0028] Figure 7 It is a partial schematic diagram of the second ejection during the ejection process of the strong demoulding ejection device of the product according to the embodiment of the present disclosure;

[0029] Figure 8 It is a schematic diagram of the arrangement of the insert pins and ejectors during the second ejection process of the strong demoulding ejection device of the product according to the embodiment of the present disclosure;

[0030] Fig. 9 It is a structural schematic diagram of the third ejection during the ejection process of the strong demoulding ejection device of the product according to the embodiment of the present disclosure;

[0031] Fig.10 It is a partial schematic diagram of the third ejection during the ejection process of the strong demoulding ejection device for a product according to an embodiment of the present disclosure;

[0032] Fig.11 It is a schematic diagram of the arrangement of the insert pins and ejectors during the third ejection process of the strong demoulding ejection device for the product according to the embodiment of the present disclosure;

[0033] Fig.12It is a schematic diagram of the first limiting structure in the strong demoulding and ejecting device of the product according to the embodiment of the present disclosure inside the rear film;

[0034] Fig.13 It is a schematic diagram of the first limiting structure in the strong demoulding and ejecting device of the product according to the embodiment of the present disclosure being outside the rear film;

[0035] Fig.14 It is a schematic diagram of the second limiting structure in the strong demoulding and ejecting device of the product according to the embodiment of the present disclosure inside the rear film;

[0036] Fig.15 This is a schematic diagram of the second limiting structure outside the rear film in the product strong demoulding and ejection device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings.

[0038] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In order to solve the problem that the spherical hole structure of the product cannot be demoulded normally / smoothly, the ejector pin cannot eject the product smoothly after injection molding, and the product will be deformed. The present disclosure provides an implementation of a strong demoulding and ejecting device for a product, see Figure 1 ,include:

[0040] The rear mold 101 is arranged on the injection mold and together with the front mold, forms the injection mold; at least one hole is provided on the rear mold 101, and the hole is used to shape the product; between the front mold and the rear mold is a space for molding the product, and when the injection mold is separated, the molded product remains on the hole of the rear mold, and then the product is smoothly demolded by the joint action of the insert pin 102 and the ejector pin 103. The insert pin 102 passes through the rear mold and passes through the hole on the rear mold, matching with the through hole on the product; the insert pin 102 is arranged in three rows in parallel, including a middle insert pin passing through the middle of the hole and a side insert pin passing through the edge of the hole; a clamping structure 106 is provided at one end of the insert pin 102 away from the bottom surface of the rear mold, and the clamping structure 106 protrudes from the top surface of the rear mold and matches with the through hole on the product; the clamping structure 106 fixes the product and the insert pin 102; the clamping structure 106 can be spherical or elliptical, or other shapes that can match with the through hole of the product, but is not limited thereto. The ejector pin 103 passes through the rear mold and fits with the bottom surface of the product, and is used to eject the product from the rear mold smoothly. When ejecting the product from the rear mold, the ejection action is completed at one time. If the product is not ejected smoothly, the one-time forced separation of the inserting pin 102 and the product may easily cause the product to deform. Therefore, a first limiting structure is also provided on the rear mold 101, and a second limiting structure matching the first limiting structure is provided on the inserting pin 102. Both the first limiting structure and the second limiting structure can limit the displacement of the inserting pin 102 along the direction perpendicular to the bottom surface of the rear film, so that the inserting pin 102 is separated from the product in batches, avoiding product deformation caused by interference between the product and the inserting pin 102, improving product production quality, and reducing production costs.

[0041] In this embodiment, the bottom surface of the rear mold refers to the side away from the product, and the contact surface between the rear mold and the product is the top surface of the rear mold; the bottom surface of the product refers to the side that contacts the hole on the rear mold.

[0042] In a specific embodiment, see Fig.12 The first limiting structure is arranged inside the rear film, including a first limiting step 104 and a second limiting step 105. The first limiting step 104 limits the displacement of the side inlay pins, and the second limiting step 105 limits the displacement of the middle inlay pins. The distance between the first limiting step 104 and the bottom surface of the rear film is less than the distance between the second limiting step 105 and the bottom surface of the rear film. The second limiting structure is arranged on the inlay pin inside the rear film, away from the end of the engaging structure 106, and the distance between the second limiting structure and the engaging structure 106 is equal. When the ejector pin 103 is normally ejected by the first distance of 5mm, refer to Figure 3 , 4 5. The insert pin 102 is pushed out along with the ejector pin 103 for a first distance of 5 mm. At this time, the product is successfully separated from the rear mold 101. When the ejector pin 103 is pushed out for a second distance of 10 mm, refer to Figure 6 , 78. The middle insert pin is ejected together with the ejector pin 103 for a second distance of 10 mm. The side insert pin cannot be displaced in a direction perpendicular to the bottom surface of the rear mold under the restriction of the first limiting step 104, so the side insert pin is separated from the product. When the ejector pin 103 is ejected for a third distance of 15 mm, refer to Fig. 9 , 10 , 11. The middle insert pin cannot be displaced in a direction perpendicular to the bottom surface of the rear mold due to the limiting effect of the second limiting step 105, so the middle insert pin is separated from the product; at this time, the product is completely separated from the insert pin, and the product is demolded smoothly.

[0043] The first limiting structure can be arranged inside the rear film or on the outer surface of the rear film. Fig.13 The first limiting structure is protruding from the bottom surface of the rear film, and the distance between the first limiting step 104 in the first limiting structure and the bottom surface of the rear film is greater than the distance between the second limiting step 105 and the bottom surface of the rear film; the second limiting structure is arranged on the inlay pin 102, away from the end of the locking structure 106, and the distance between the second limiting structure and the locking structure 106 is equal; referring to the above embodiment, the running distance and running principle of the inlay pin 102 along the direction perpendicular to the bottom surface of the rear film are consistent with the above embodiment.

[0044] In a further embodiment, see Fig.14 The first limiting structure is arranged inside the rear film, and is at an equal distance from the bottom surface of the rear film; the second limiting structure is arranged on the insert pin inside the rear film, and includes a first limiting block 107 and a second limiting block 108. The first limiting block 107 limits the displacement of the side insert pins, and the second limiting block 108 limits the displacement of the middle insert pins. The distance between the first limiting block 107 and the bottom surface of the rear film is greater than the distance between the second limiting block 108 and the bottom surface of the rear film. When the ejector pin 103 is normally ejected out of the first distance of 5mm, refer to Figure 3 , 4 5. The insert pin 102 is pushed out along with the ejector pin 103 for a first distance of 5 mm. At this time, the product is successfully separated from the rear mold 101. When the ejector pin 103 is pushed out for a second distance of 10 mm, refer to Figure 6 , 7 8. The middle insert pin is ejected together with the ejector pin 103 for a second distance of 10 mm. The side insert pin cannot be displaced in a direction perpendicular to the bottom surface of the rear mold under the restriction of the first limit stopper 107, so the side insert pin is separated from the product. When the ejector pin 103 is ejected for a third distance of 15 mm, refer to Fig. 9 , 10 11. The middle insert pin cannot be displaced in a direction perpendicular to the bottom surface of the rear mold due to the limiting effect of the second limit stop block 108, so the middle insert pin is separated from the product; at this time, the product is completely separated from the insert pin, and the product is demolded smoothly.

[0045] The inlay pin may be arranged protruding from the bottom surface of the rear film, and the second limiting structure may also be arranged on the inlay pin protruding from the bottom surface of the rear film. Fig.15 The first limiting structure is arranged inside the rear film, and the first limiting structure is at an equal distance from the bottom surface of the rear film; the second limiting structure is arranged at one end of the inserting pin 102 protruding from the bottom surface of the rear film, away from the card and structure 106; the distance between the first limiting block 107 and the bottom surface of the rear film in the second limiting structure is smaller than the distance between the second limiting block 108 and the bottom surface of the rear film; referring to the above embodiment, the running distance and running principle of the inserting pin 102 along the direction perpendicular to the bottom surface of the rear film are consistent with the above embodiment.

[0046] The first limiting structure and the second limiting structure can act separately or together, so that the inserting pins can be separated from the products in batches. Therefore, in a further embodiment, the first limiting structure is arranged on the rear film, and the inserting pin is provided with a second limiting structure matching the first limiting structure. The first limiting structure and the second limiting structure cooperate with each other to limit the displacement of the inserting pin in a direction perpendicular to the bottom surface of the rear film, so that the inserting pin can be separated from the products in batches.

[0047] The above embodiments all adopt a secondary ejection method, so that the product can be demoulded smoothly, the quality of the molded product is improved, the subsequent manual screening process is saved, and subsequent production delays due to product size or deformation problems are avoided.

[0048] In a further embodiment, at least 12 ejector pins are provided through the rear mold; the ejector pins evenly penetrate the rear mold and fit the bottom surface of the product to avoid uneven distribution of the ejector pins, which may cause uneven force on the product and deformation of the product when the ejector pins eject the product.

[0049] In the above-mentioned embodiment of the present disclosure, a strong demoulding and ejecting device for products is used to improve the quality of molded plastic products, reduce production costs, and enable plastic products to be ejected safely and completely, ensuring that the plastic products are not damaged. This embodiment adopts a limiting structure; by limiting the displacement of the insert pins in the vertical direction along the bottom surface of the rear mold, the insert pins and the products are separated in batches, saving the subsequent manual screening process, avoiding subsequent claims for assembly problems on the client's production line due to size or deformation problems, improving production quality, and reducing production costs.

[0050] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; based on the concept of the present disclosure, the above embodiments or technical features in different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0051] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A product strong demoulding ejection device, comprising: A rear mold, wherein at least one hole is provided on the rear mold, and the hole is used to shape the product; An insert pin, the insert pin passes through the rear mold, through the hole, and matches with the through hole on the product; An ejector pin, which passes through the rear mold and is used to eject the product; It is characterized in that the rear mold is further provided with a first limiting structure, and the inlay pin is provided with a second limiting structure matching the first limiting structure, and the first limiting structure and the second limiting structure work together to limit the displacement of the inlay pin along the direction perpendicular to the bottom surface of the rear mold; The inlay pins are arranged in three rows in parallel; the inlay pins include middle inlay pins passing through the middle of the hole and side inlay pins passing through the edge of the hole; When the ejector pin is ejected a first distance, the product is separated from the rear mold; when the ejector pin is ejected a second distance, the displacement of the side insert pin is restricted so that the side insert pin is separated from the product; when the ejector pin is ejected a third distance, the displacement of the middle insert pin is restricted so that the side insert pin is separated from the product; The first limiting structure includes a first limiting step and a second limiting step; the first limiting step limits the displacement of the side insert pins, and the second limiting step limits the displacement of the middle insert pins; The first limiting step and the second limiting step are arranged on the rear mold, and in a direction perpendicular to the bottom surface of the rear mold, the first limiting step limits the displacement distance of the side insert pin to be smaller than the displacement distance of the middle insert pin to be limited by the second limiting step; The second limiting structure includes a first limiting block and a second limiting block; the first limiting block limits the displacement of the side insert pins, and the second limiting block limits the displacement of the middle insert pins; The first limit stopper and the second limit stopper are respectively arranged on the side insert pin and the middle insert pin, and the displacement distance of the side insert pin limited by the first limit stopper is smaller than the displacement distance of the middle insert pin limited by the second limit stopper.

2. The product strong demoulding ejection device according to claim 1 is characterized in that: At least 12 ejector pins are provided through the rear mold.

3. The product strong demoulding ejection device according to claim 1 is characterized in that: One end of the insert pin away from the bottom surface of the rear mold is provided with a clamping structure, and the clamping structure protrudes from the top surface of the rear mold.

4. The product strong demoulding and ejecting device according to claim 3 is characterized in that: The clamping structure is spherical or elliptical.

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