Box body rear plate upper cover injection mold

Abstract

The utility model discloses a box body rear plate upper cover injection mold which comprises an upper mold assembly, a lower mold assembly and a lower mold assembly, the upper mold assembly comprises an upper mold base, an upper mold plate, an upper mold core and an insert, the insert is fixedly connected with the upper mold base, and the insert is provided with a first core column; the lower die assembly comprises a lower die base, a lower die core and a lateral core-pulling sliding block, the lateral core-pulling sliding block is installed on the lower die base in a sliding mode and provided with a second core column, and the first core column and the second core column are combined to be used for forming a through hole in a plastic part. According to the injection mold for the upper cover of the rear plate of the box body, the first core column and the second core column are combined to form the through hole, so that the shrinkage phenomenon can be reduced, the texture of a frosted surface is kept, and the qualification rate of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and more specifically to an injection mold for a cover on a rear plate of a box body. Background Art

[0002] exist Figure 1-2 The cover injection molded part on the back plate of the box shown has a reinforcing rib on one side, a frosted surface, and a groove structure on the frosted surface. These grooves are connected to the reinforcing rib through the handle hole, and a through hole is provided in the handle part.

[0003] However, in traditional mold design, in order to realize the through-hole structure, a lateral core pulling mechanism for forming the entire through-hole is usually provided in the lower mold assembly. However, after adopting this solution, the applicant found that the opening of the through-hole toward the groove side is prone to shrinkage, which will affect the qualified rate of the product. Summary of the invention

[0004] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model proposes an injection mold for the upper cover of the rear plate of the box body, which can reduce the occurrence of shrinkage by setting a first core column and a second core column combined forming through hole, thereby maintaining the texture of the frosted surface and improving the qualified rate of the product.

[0005] The technical solution adopted by the utility model is: to provide an injection mold for a cover on the rear plate of a box body, comprising:

[0006] An upper die assembly, comprising an upper die base, an upper die plate, an upper die core and an insert, wherein the insert is fixedly connected to the upper die base and has a first core column;

[0007] The lower mold assembly includes a lower mold base, a lower mold core and a lateral core-pulling slider, wherein the lateral core-pulling slider is slidably mounted on the lower mold base, and the lateral core-pulling slider has a second core column, and the combination of the first core column and the second core column is used to form a through hole on a plastic part.

[0008] Since the through hole is part of the frosted surface, the traditional mold design uses a lateral core pulling mechanism for forming the entire through hole, and the opening of the through hole toward the groove side is prone to slight shrinkage, affecting the texture of the frosted surface. After adopting the above structure, the through hole on the plastic part is formed by the combination of the first core column and the second core column, which can reduce the shrinkage of the opening of the through hole toward the groove side, thereby maintaining the texture of the frosted surface and improving the qualified rate of the product.

[0009] According to one embodiment of the utility model, the upper mold base is equipped with an inclined guide column, and the lateral core-pulling slider is provided with an inclined guide hole that cooperates with the inclined guide column; the inclined guide column and the inclined guide hole cooperate obliquely, and the mold opening force of the upper mold assembly and the lower mold assembly is utilized to drive the lateral core-pulling slider to move, thereby completing the core pulling action.

[0010] According to an embodiment of the utility model, the lower mold assembly also includes a top plate arranged at the lower part of the lower mold base; the top plate is fixedly connected to one end of a plurality of ejector pins, and the ejector pins are used to eject the plastic part from the lower mold core.

[0011] According to one embodiment of the utility model, the upper mold assembly also includes a distance tie rod, and the upper mold assembly is connected to the lower mold base via the distance tie rod; the distance tie rod is connected to both sides of the mold to accurately control the opening and closing distance of the mold, ensuring that the size and shape of the parts remain consistent during the production process.

[0012] According to an embodiment of the utility model, the lateral core-pulling slider has a contour structure for forming a reinforcing rib on a plastic part.

[0013] According to an embodiment of the utility model, the injection cavity types of the mold include one-outlet-two type and one-outlet-four type. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a three-dimensional diagram of the plastic cover on the rear plate of the box body in the embodiment of the utility model;

[0016] Figure 2 This is a structural schematic diagram of the plastic cover on the rear plate of the box body in the embodiment of the utility model;

[0017] Figure 3 A three-dimensional diagram of a mold in an embodiment of the utility model;

[0018] Figure 4 A three-dimensional diagram of an upper mold assembly in an embodiment of the utility model;

[0019] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0020] Figure 6 A three-dimensional diagram of the lower mold assembly in the embodiment of the utility model;

[0021] Figure 7 It is a three-dimensional diagram of the lower mold core and the side core-pulling slider in the embodiment of the utility model;

[0022] Figure 8 This is a three-dimensional diagram of the upper mold assembly in the embodiment of the utility model after removing the upper mold core;

[0023] Fig. 9 for Figure 8 A partial enlarged view of point B in the middle;

[0024] Fig.10 It is a stereoscopic view of the lateral core-pulling slider in the embodiment of the utility model.

[0025] Description of the numbers in the figure:

[0026] 10. Plastic parts; 20. Upper mold assembly; 30. Lower mold assembly;

[0027] 11. Reinforcement rib; 12. Groove; 13. Handle hole; 14. Handle portion; 15. Through hole;

[0028] 21. Upper die seat; 22. Upper die plate; 23. Upper die core; 24. Inclined guide column; 25. Insert; 26. Fixed distance tie rod;

[0029] 211, mounting hole;

[0030] 251, first core column; 252, first forming portion; 253, mounting column;

[0031] 31. Lower die base; 32. Lower die core; 33. Lateral core-pulling slider; 34. Top plate;

[0032] 331. Oblique guide hole; 332. Profile structure; 333. Second core column; 334. Second forming portion. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. Example

[0034] Combination Figure 1-2As shown, in this embodiment, the plastic part 10 is the upper cover of the rear plate of the box body, which is in a long strip shape as a whole, and has a frosted surface on one side in the thickness direction. The frosted surface includes grooves 12 located at both ends of the plastic part 10, and the grooves 12 and the plastic part 10 are provided with a handle hole 13 and a through hole 15 on one side in the width direction. The through hole 15 is located on the handle part 14. The plastic part 10 is provided with a reinforcing rib 11 on one side in the width direction. The red part in the figure is the through hole 15, and the opening edges on both sides of the through hole 15 are chamfered.

[0035] like Figure 3-10 As shown, in this embodiment, a box rear plate cover injection mold is disclosed, comprising:

[0036] An upper mold assembly 20, comprising an upper mold base 21, an upper mold plate 22, an upper mold core 23 and an insert 25, wherein the insert 25 is fixedly connected to the upper mold base 21 and has a first core column 251;

[0037] The lower mold assembly 30 includes a lower mold base 31, a lower mold core 32 and a lateral core-pulling slider 33. The lateral core-pulling slider 33 is slidably installed on the lower mold base 31. The lateral core-pulling slider 33 has a second core column 333. The combination of the first core column 251 and the second core column 333 is used to mold the through hole 15 on the plastic part 10.

[0038] Combination Figure 3-5 As shown, in this embodiment, the upper mold plate 22 in the upper mold assembly 20 is arranged on the upper part of the upper mold base 21, and a gate sleeve is provided on the upper mold plate 22. The upper mold plate 22 is fixedly installed with a mounting plate (not shown in the figure), which is arranged along the width direction of the upper mold plate 22 and is located between the upper mold plate 22 and the upper mold base 21. The lower part of the insert 25 has an oblique mounting column 253, which passes through the mounting hole 211 on the upper mold base 21 and is fixedly connected to the mounting plate, thereby realizing the installation of the insert 25. A part of the insert 25 is located in the parting surface of the upper mold core 23, and this part of the insert 25 has a first core column 251.

[0039] Combination Figure 6-10 As shown, in this embodiment, the lower mold assembly 30 includes a lower mold base 31 and a lower mold core 32, the lower mold core 32 is fixedly mounted on the lower mold base 31, and lateral core-pulling sliders 33 are slidably mounted on both sides of the width of the lower mold base 31. That is, the injection cavity type of the mold is one-out-two-mold, the mold has two cavities, and each cavity is composed of an upper mold core 23, a lower mold base 31, a lateral core-pulling slider 33 and an insert 25.

[0040] In another embodiment, the injection cavity type of the mold is one-out-four, and the mold has four cavities, each of which is composed of an upper mold core 23, a lower mold base 31, a lateral core-pulling slider 33 and an insert 25.

[0041] Further, in this embodiment, the end of the lateral core-pulling slider 33 is provided with a second core column 333 and a contour structure 332 for molding the reinforcing rib 11 on the plastic part 10. The insert has a first molding portion 252, and the lateral core-pulling slider 33 is correspondingly provided with a second molding portion 334. When the mold is closed, the first core column 251 and the second core column 333 are combined to mold the through hole 15 on the plastic part 10. The combination of the first molding portion 252 and the second molding portion 334 is used to mold the handle hole 13 on the molding component, and the combination of the insert and the lateral core-pulling slider 33 is used to mold the handle portion 14 of the plastic part 10.

[0042] Specifically, the upper die seat 21 is equipped with two pairs of oblique guide pillars 24, and the lateral core-pulling slider 33 is provided with an oblique guide hole 331 that cooperates with the oblique guide pillars 24; the oblique guide pillars 24 and the oblique guide holes 331 cooperate obliquely, and the mold opening force of the upper die assembly 20 and the lower die assembly 30 is used to drive the lateral core-pulling slider 33 to move, thereby completing the core-pulling action. The lower die assembly 30 also includes a top plate 34 disposed at the lower part of the lower die seat 31; the top plate 34 is fixedly connected to one end of a plurality of ejector pins, and the ejector pins are used to eject the plastic part 10 from the lower die core 32.

[0043] Specifically, the upper die assembly 20 further includes two pairs of distance tie rods 26 , and the upper die assembly 20 is connected to the lower die base 31 via the distance tie rods 26 .

[0044] Furthermore, in the present embodiment, one end of the distance rod 26 is fixedly connected to the mounting plate, the middle part of the distance rod 26 is fixedly connected to the upper mold plate 22 by a fastener, and the end of the distance rod 26 away from the mounting plate is connected to the lower mold base 31. The distance rod 26 is connected to both sides of the mold, so as to accurately control the opening and closing distance of the mold, thereby ensuring that the size and shape of the parts remain consistent during the production process.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A box rear panel upper cover injection mold, characterized in that: include: An upper die assembly, comprising an upper die base, an upper die plate, an upper die core and an insert, wherein the insert is fixedly connected to the upper die base and has a first core column; The lower mold assembly includes a lower mold base, a lower mold core and a lateral core-pulling slider, wherein the lateral core-pulling slider is slidably mounted on the lower mold base, and the lateral core-pulling slider has a second core column, and the combination of the first core column and the second core column is used to form a through hole on a plastic part.

2. The box body rear panel upper cover injection mold according to claim 1, characterized in that: The upper die seat is provided with an inclined guide column, and the lateral core-pulling slider is provided with an inclined guide hole matched with the inclined guide column.

3. The box rear panel upper cover injection mold according to claim 1, characterized in that: The lower die assembly also includes a top plate disposed at the lower portion of the lower die seat.

4. The box rear panel upper cover injection mold according to claim 1, characterized in that: The upper die assembly also includes a distance rod, and the upper die assembly is connected to the lower die base via the distance rod.

5. The box rear panel upper cover injection mold according to claim 1, characterized in that: The lateral core-pulling slider has a contour structure for forming reinforcing ribs on a plastic part.

6. The box rear panel upper cover injection mold according to claim 1, characterized in that: The injection cavity types of the mold include one-outlet-two-type and one-outlet-four-type.

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