Mold convenient to demold

Abstract

The utility model discloses a mold convenient to demold. The mold convenient to demold comprises a mold body, at least one forming mechanism and a demolding mechanism. The mold body comprises an upper mold mechanism and a lower mold mechanism, and the upper mold mechanism is arranged to be capable of covering the lower mold mechanism in an upward moving and mold opening mode. Each set of forming mechanism comprises a forming assembly, each forming assembly comprises a first forming part and a second forming part, and the first forming parts and the second forming parts are oppositely arranged and both installed on the lower die mechanism. The upper die mechanism, the first forming piece and the second forming piece jointly form a forming cavity. The demolding mechanism comprises a first demolding piece, the first forming piece is connected to the first demolding piece, and the first demolding piece is arranged to be installed on the lower mold mechanism in the mode that the first demolding piece can move in the horizontal direction perpendicular to the mold opening and closing direction of the upper mold mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a mold which is easy to demould. Background Art

[0002] Undercuts are the structure of reverse wrapping molds that exist in many plastic products. Due to the existence of undercuts, these plastic products cannot be demolded directly in one direction after injection molding. In order to facilitate the smooth demolding of plastic products with undercuts, the existing molds will set the part that forms the undercut of the product as a molded part independent of the upper and lower molds, and the molded part needs to be connected to the upper and lower molds by snapping. When the upper mold is opened, the principle of inclined wedges is used between the molded part and the upper mold to help separate the undercut formed by the product from the molded part, so that the product can be demolded completely. Since the molded part always remains connected to the upper and lower molds, the degree of opening of the upper mold is limited, which makes it inconvenient for the staff to take the product. Utility Model Content

[0003] In order to achieve at least one of the above advantages of the present invention, the present invention provides a mold that is easy to demould, and the mold that is easy to demould comprises:

[0004] A mold body, the mold body comprising an upper mold mechanism and a lower mold mechanism, the upper mold mechanism being configured to cover the lower mold mechanism in a manner of being able to move upward to open the mold;

[0005] At least one molding mechanism, each group of the molding mechanisms includes a molding assembly, the molding assembly includes a first molding member and a second molding member, the first molding member and the second molding member are arranged opposite to each other, and the first molding member and the second molding member are both installed on the lower mold mechanism, the upper mold mechanism, the first molding member and the second molding member jointly form a molding cavity, and the first molding member and / or the second molding member form a first molding structure on the inner wall forming the molding cavity;

[0006] The demoulding mechanism comprises a first demoulding member, the first molding member is connected to the first demoulding member, and the first demoulding member is installed on the lower mold mechanism in a manner that it can move in a horizontal direction perpendicular to the opening and closing direction of the upper mold mechanism.

[0007] According to one embodiment of the utility model, the demolding mechanism also includes a second demolding member, the second molding member is connected to the second demolding member, and the second demolding member is installed on the lower mold mechanism in a manner that it can move in a horizontal direction perpendicular to the opening and closing direction of the upper mold mechanism.

[0008] According to an embodiment of the utility model, each group of the molding mechanisms also includes a third molding piece, which is fixedly mounted on the lower mold mechanism and extends vertically into the molding cavity, and there is a gap between the inner wall of the molding cavity and the outer peripheral wall of the third molding piece.

[0009] According to an embodiment of the present invention, the outer peripheral wall of the third molded part forms a second molded structure.

[0010] According to an embodiment of the utility model, the lower mold mechanism is installed with multiple groups of the molding mechanisms, the first molding parts arranged by the multiple groups of the molding mechanisms are all installed on the first demolding part, and the second molding parts arranged by the multiple groups of the molding mechanisms are all installed on the second demolding part.

[0011] According to an embodiment of the utility model, the bottoms of the first molded part and the second molded part both form a connecting structure, the first demolding part and the second demolding part both form an assembly structure, the assembly structure is detachably assembled to the connecting structure, and either the connecting structure or the assembly structure is implemented as a groove; the other is implemented as a pin.

[0012] According to an embodiment of the utility model, one end of the first demolding member away from the first molding member extends from the side circumference of the lower mold mechanism to the outside, and one end of the second demolding member away from the second molding member extends from the side circumference of the lower mold mechanism to the outside.

[0013] According to one embodiment of the utility model, the upper mold mechanism forms at least one first abutment wall, and a second abutment wall is obliquely extended between the top wall and the bottom wall of the first molding part. The first abutment wall remains parallel to the second abutment wall, and the angle between the direction in which the second abutment wall extends toward the bottom wall of the first molding part and the direction in which the first molding part moves away from the second molding part is an acute angle.

[0014] According to one embodiment of the utility model, the upper mold mechanism also forms at least one first extrusion wall, and the second extrusion wall is obliquely extended between the top wall and the bottom wall of the second molded part, the first extrusion wall is parallel to the second extrusion wall, and the angle between the direction in which the second extrusion wall extends toward the bottom wall of the second molded part and the direction in which the second molded part moves toward the first molded part is an obtuse angle.

[0015] According to one embodiment of the utility model, the upper mold mechanism also has a lower pressure wall, which faces the top wall of the first molding part and the top wall of the second molding part. When the upper mold mechanism is covered on the lower mold mechanism, the lower pressure wall abuts against the top wall of the first molding part and the top wall of the second molding part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The schematic diagram of the structure of the mold for easy demoulding of the utility model in one state is shown.

[0017] Figure 2 The schematic diagram of the structure of the mold for easy demoulding of the utility model in another state is shown.

[0018] Figure 3 A cross-sectional view of a mold for easy demoulding according to the utility model is shown in one state.

[0019] Figure 4 Shows Figure 3 A schematic diagram of the enlarged structure of part A.

[0020] Figure 5 An exploded view of the mold portion structure that facilitates demoulding according to the utility model is shown.

[0021] Figure 6 Shows Figure 5 Schematic diagram of the enlarged structure of part B.

[0022] Figure 7 The schematic structural diagram of the upper mold mechanism of the utility model is shown. DETAILED DESCRIPTION

[0023] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0024] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which 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. Therefore, the above terms should not be understood as limiting the present invention.

[0025] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0026] refer to Figures 1 to 7A mold that is easy to demold according to a preferred embodiment of the utility model will be described in detail below. The mold that is easy to demold includes a mold body 10, a molding mechanism 20 and a demolding mechanism 30.

[0027] The mold body 10 includes an upper mold mechanism 11 and a lower mold mechanism 12. The upper mold mechanism 11 is configured to cover the lower mold mechanism 12 in a manner of moving upward to open the mold.

[0028] Each group of the molding mechanism 20 includes a molding assembly 21. The molding assembly 21 includes a first molding part 211 and a second molding part 212. The first molding part 211 and the second molding part 212 are arranged opposite to each other, and the first molding part 211 and the second molding part 212 are both installed on the lower mold mechanism 12. The upper mold mechanism 11, the first molding part 211 and the second molding part 212 jointly form a molding cavity 10001, and the injection material in a molten state is cooled and molded after being injected into the molding cavity 10001.

[0029] It is worth mentioning that the first molding part 211 and / or the second molding part 212 form a first molding structure 213 on the inner wall of the molding cavity 10001, and an undercut that wraps the first molding structure 213 or is wrapped by the first molding structure 213 is formed on the product produced by injection molding.

[0030] The demoulding mechanism 30 includes a first demoulding member 31. The first molding member 211 is connected to the first demoulding member 31. The first demoulding member 31 is arranged to be installed on the lower mold mechanism 12 in a manner that it can move in a horizontal direction perpendicular to the mold opening and closing direction of the upper mold mechanism 11, that is, the first demoulding member 31 can drive the first molding member 211 to approach or move away from the second molding member 212 in the horizontal direction.

[0031] Specifically, after the first molding part 211 and the second molding part 212 are abutted against each other and the upper mold mechanism 11 is covered on the lower mold mechanism 12, the injection material in a molten state is injected into the molding cavity 10001. After cooling, the upper mold mechanism 11 moves a predetermined distance in the mold opening direction to expose the top of the product; then the first demolding part 31 drives the first molding part 211 to move in the direction away from the second molding part 212, and finally the staff separates the product from the second molding part 212, thereby realizing product demolding.

[0032] Preferably, the demoulding mechanism 30 further includes a second demoulding member 32. The second molding member 212 is connected to the second demoulding member 32. The second demoulding member 32 is installed on the lower mold mechanism 12 in a manner that it can move in a horizontal direction perpendicular to the mold opening and closing direction of the upper mold mechanism 11, that is, the second demoulding member 32 can drive the second molding member 212 to approach or move away from the first molding member 211 in the horizontal direction.

[0033] In this way, after the molten injection material is injected into the molding cavity 10001 and cooled to form, the upper mold mechanism 11 moves a predetermined distance in the mold opening direction to expose the top of the product; then the first demolding member 31 and the second demolding member 32 respectively drive the first molding member 211 and the second molding member 212 away from each other in the horizontal direction, so that the first molding member 211 and the second molding member 212 wrapped around the bottom of the product are separated from the bottom of the product to achieve product demolding.

[0034] Preferably, each group of the molding mechanisms 20 further includes a third molding member 22. The third molding member 22 is fixedly mounted on the lower mold mechanism 12 and extends vertically into the molding cavity 10001, and a gap exists between the inner wall of the molding cavity 10001 and the outer peripheral wall of the third molding member 22, and the injection material in a molten state is injected into the gap between the inner wall of the molding cavity 10001 and the outer peripheral wall of the third molding member 22.

[0035] It is worth mentioning that after the first molding part 211 and the second molding part 212 are in contact with each other and the upper mold mechanism 11 is covered on the lower mold mechanism 12, the molten injection material is injected into the gap between the inner wall of the molding cavity 10001 and the outer peripheral wall of the third molding part 22. After cooling, the upper mold mechanism 11 moves a predetermined distance in the mold opening direction to expose the top of the product; then the first demolding part 31 and the second demolding part 32 respectively drive the first molding part 211 and the second molding part 212 to move away from each other in the horizontal direction. Since the product is wrapped around the outer periphery of the third molding part 22, the third molding part 22 limits the product in the horizontal direction, so that the product can be separated from the first molding part 211 and the second molding part 212 moving in the horizontal direction. Finally, the staff separates the product from the third molding part 22 to realize product demolding.

[0036] In one embodiment, the outer peripheral wall of the third molded part 22 forms a second molded structure 221, and an undercut is formed on the product produced by injection molding, which wraps around the second molded structure 221 or is wrapped by the second molded structure 221. It can be understood that the first molded part 211 and the second molded part 212 are separated from each other to provide space required for deformation of the product caused by demolding the product from the third molded part 22, so as to avoid the product from being broken due to excessive force, thereby ensuring the integrity of the product.

[0037] Those skilled in the art can understand that, when the molding mechanism 20 is provided with the third molding part 22, the product injection molded by the mold that is easy to demold has a groove or a channel; when the molding mechanism 20 is not provided with the third molding part 22, the product injection molded by the removable inverted mold is solid.

[0038] Preferably, the lower mold mechanism 12 is provided with a plurality of groups of the molding mechanisms 20, so that a plurality of products can be produced by a single mold opening and closing, thereby improving production efficiency.

[0039] Preferably, the first molding pieces 211 provided by the multiple groups of molding mechanisms 20 are all installed on the first demolding piece 31, and the second molding pieces 212 provided by the multiple groups of molding mechanisms 20 are all installed on the second demolding piece 32. In this way, the movement of the first demolding piece 31 and the second demolding piece 32 can drive the multiple first molding pieces 211 and the multiple second molding pieces 212 to be separated from the respective molded products at the same time.

[0040] It is worth mentioning that one end of the first demolding member 31 away from the first molding member 211 extends from the side of the lower mold mechanism 12 to the outside to connect with the driving mechanism; one end of the second demolding member 32 away from the second molding member 212 extends from the side of the lower mold mechanism 12 to the outside to connect with the driving mechanism.

[0041] Further, the upper mold mechanism 11 forms at least one first abutting wall 111, and a second abutting wall 2111 is obliquely extended between the top wall and the bottom wall of the first molding 211, and the first abutting wall 111 is kept parallel to the second abutting wall 2111. The angle between the direction in which the second abutting wall 2111 extends toward the bottom wall of the first molding 211 and the direction in which the first molding 211 moves away from the second molding 212 is an acute angle, so that when the upper mold mechanism 11 moves in the covering direction, the first abutting wall 111 squeezes the second abutting wall 2111, and the first molding 211 is squeezed and moves in the horizontal direction toward the direction close to the second molding 212, so as to assist the first molding 211 in resetting.

[0042] Also preferably, the upper mold mechanism 11 further forms at least one first extrusion wall 112, and a second extrusion wall 2121 is obliquely extended between the top wall and the bottom wall of the second molded part 212, and the first extrusion wall 112 is parallel to the second extrusion wall 2121. The angle between the direction in which the second extrusion wall 2121 extends toward the bottom wall of the second molded part 212 and the direction in which the second molded part 212 moves toward the first molded part 211 is an obtuse angle, so that when the upper mold mechanism 11 moves along the covering direction, the first extrusion wall 112 squeezes the second extrusion wall 2121, and the second molded part 212 is squeezed and moves in the horizontal direction toward the first molded part 211 to assist the second molded part 212 in resetting.

[0043] In one embodiment, the bottom of the first molded part 211 and the second molded part 212 both form a connection structure 2101; the first demolding part 31 and the second demolding part 32 both form an assembly structure 3001. Either the connection structure 2101 or the assembly structure 3001 is implemented as a groove; the other is implemented as a latch. The assembly structure 3001 is detachably assembled to the connection structure 2101. The first demolding part 31 is detachably connected to the first molded part 211 through the connection structure 2101 and the assembly structure 3001; the second demolding part 32 is detachably connected to the second molded part 212 through the connection structure 2101 and the assembly structure 3001.

[0044] Preferably, the upper mold mechanism 11 further has a lower pressing wall 113. The lower pressing wall 113 faces the top wall of the first molded part 211 and the top wall of the second molded part 212. When the upper mold mechanism 11 is covered with the lower mold mechanism 12, the lower pressing wall 113 abuts against the top wall of the first molded part 211 and the top wall of the second molded part 212 to prevent the first molded part 211 and the second molded part 212 from being lifted up by the injection material during injection molding.

[0045] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A mold that is easy to demould, characterized in that: The mold that is easy to demould comprises: A mold body, the mold body comprising an upper mold mechanism and a lower mold mechanism, the upper mold mechanism being configured to cover the lower mold mechanism in a manner of being able to move upward to open the mold; At least one molding mechanism, each group of the molding mechanisms includes a molding assembly, the molding assembly includes a first molding member and a second molding member, the first molding member and the second molding member are arranged opposite to each other, and the first molding member and the second molding member are both installed on the lower mold mechanism, the upper mold mechanism, the first molding member and the second molding member jointly form a molding cavity, and the first molding member and / or the second molding member form a first molding structure on the inner wall forming the molding cavity; The demoulding mechanism comprises a first demoulding member, the first molding member is connected to the first demoulding member, and the first demoulding member is installed on the lower mold mechanism in a manner that it can move in a horizontal direction perpendicular to the opening and closing direction of the upper mold mechanism.

2. The mold for easy demoulding according to claim 1, characterized in that: The demoulding mechanism further includes a second demoulding member, the second molding member is connected to the second demoulding member, and the second demoulding member is installed on the lower mold mechanism in a manner that it can move in a horizontal direction perpendicular to the opening and closing direction of the upper mold mechanism.

3. The mold for easy demoulding according to claim 2, characterized in that: Each group of the molding mechanisms further includes a third molding member, which is fixedly mounted on the lower mold mechanism and extends vertically into the molding cavity, and a gap exists between the inner wall of the molding cavity and the outer peripheral wall of the third molding member.

4. The mold for easy demoulding according to claim 3, characterized in that: The outer peripheral wall of the third molded part forms a second molded structure.

5. The mold for easy demoulding according to claim 4, characterized in that: The lower mold mechanism is installed with multiple groups of the molding mechanisms, the first molding parts arranged by the multiple groups of the molding mechanisms are all installed on the first demolding part, and the second molding parts arranged by the multiple groups of the molding mechanisms are all installed on the second demolding part.

6. The mold for easy demoulding according to claim 5, characterized in that: The bottoms of the first molded part and the second molded part both form a connecting structure, the first demoulding part and the second demoulding part both form an assembly structure, the assembly structure is detachably assembled to the connecting structure, and either the connecting structure or the assembly structure is implemented as a groove; the other is implemented as a pin.

7. The mold for easy demoulding according to claim 6, characterized in that: One end of the first demolding member away from the first molding member extends from the side circumference of the lower mold mechanism to the outside, and one end of the second demolding member away from the second molding member extends from the side circumference of the lower mold mechanism to the outside.

8. The mold for easy demoulding according to claim 7, characterized in that: The upper mold mechanism forms at least one first abutment wall, and a second abutment wall is obliquely extended between the top wall and the bottom wall of the first molding part. The first abutment wall remains parallel to the second abutment wall, and the angle between the direction in which the second abutment wall extends toward the bottom wall of the first molding part and the direction in which the first molding part moves away from the second molding part is an acute angle.

9. The mold for easy demoulding according to claim 8, characterized in that: The upper mold mechanism also forms at least one first extrusion wall, and the second extrusion wall is obliquely extended between the top wall and the bottom wall of the second molded part. The first extrusion wall remains parallel to the second extrusion wall, and the angle between the direction in which the second extrusion wall extends toward the bottom wall of the second molded part and the direction in which the second molded part moves toward the first molded part is an obtuse angle.

10. The mold for easy demoulding according to claim 9, characterized in that: The upper mold mechanism also has a lower pressure wall, which faces the top wall of the first molded part and the top wall of the second molded part. When the upper mold mechanism is covered on the lower mold mechanism, the lower pressure wall abuts against the top wall of the first molded part and the top wall of the second molded part.

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