Injection mold with quick change of inserts

Abstract

The utility model relates to the field of injection moulding, and the utility model discloses a kind of injection moulding mould of insert quick exchange, comprising: template, mould kernel, product insert and fixed insert, template is equipped with guide element, guide element is equipped with guide hole, the outer wall of template is equipped with through-hole, mould kernel is equipped with recess, product insert is set in recess inside, product insert one end is equipped with inclined hole, fixed insert includes insert main body and first insert head, insert main body is set in through-hole inside, insert main body one end is sleeved in guide hole inside, first insert head is sleeved in inclined hole inside, first insert head end far from insert main body is inclined to the parting surface of mould kernel.In the case without disassembling mould, after pulling out fixed insert, product insert on mould kernel can be replaced, reduce mould and disassembly process, quickly realize the exchange production of one mould multiple types of products, especially suitable for similar specification model, variety, unit production quantity little mould.

Description

Technical Field

[0001] This utility model relates to the field of injection molding, and in particular to an injection mold for quick interchange of inserts. Background Technology

[0002] Each injection-molded product requires a specially developed production mold. During the injection molding process, the entire mold is changed to accommodate different product styles. For products with similar specifications, only minor differences exist in certain areas. Since the overall structure and shape of similar products are not significantly different, to save costs, inserts are often used to produce different specifications within the same mold. The insert typically has a protruding lug (i.e., a mounting plate) at its tail. The mold core and template clamp the mounting plate at the tail of the insert, thus fixing the insert to the mold core. However, changing inserts requires repeated disassembly and reassembly of the mold core. After disassembly and reassembly, the mold core needs to be readjusted to ensure the alignment accuracy of the moving and fixed mold cores and prevent changes in the cavity volume. Therefore, changing inserts requires readjusting the mold core's positioning, and the insert replacement process is time-consuming. Utility Model Content

[0003] The purpose of this invention is to provide an injection mold with quick-change inserts, so as to directly replace the product inserts on the mold core without disassembling the mold.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an injection mold with quick-interchange inserts, comprising: The template is provided with a guide element, the guide element has a guide hole, and the outer wall of the template has a through hole communicating with the guide hole; Mold core, wherein the mold core is embedded in the template; The product insert is used to form the product. The mold core has a groove, the product insert is placed inside the groove, and one end of the product insert has an inclined hole. The center line of the inclined hole intersects the mold opening direction of the template at an inclination. A fixed insert, comprising an insert body and a first insert head, the first insert head being fixed to one end of the insert body, one end of the insert body being disposed inside a through hole, the other end of the insert body being sleeved inside a guide hole, the first insert head being sleeved inside an inclined hole, and the end of the first insert head away from the insert body being inclined toward the parting surface of the mold core.

[0005] Preferably, the product insert includes an insert block and a connecting block. One end of the insert block has a molded surface, and the other end of the insert block is detachably connected to the connecting block. The insert block is disposed inside the groove, the connecting block penetrates the template, and the inclined hole is disposed in the middle of the connecting block.

[0006] Preferably, the centerline of the through hole is perpendicular to the mold opening direction of the template, and the centerline of the guide hole is perpendicular to the mold opening direction of the template.

[0007] Preferably, the guide element is a block structure, and the guide element is integrally formed with the template or detachably connected.

[0008] Preferably, the fixing insert further includes a second insert head, the first insert head and the second insert head are fixed to the same end of the insert body, and the inclined hole includes a first inclined hole and a second inclined hole, the first insert head and the second insert head are respectively disposed inside the first inclined hole and the second inclined hole.

[0009] Preferably, the inclination angle 'a' of the first oblique hole relative to the mold opening direction and the inclination angle 'b' of the second oblique hole relative to the mold opening direction satisfy the following relationship: a > 0, b > 0, a ≠ b.

[0010] Preferably, the injection mold with quick-change inserts further includes a cover plate, one end of the insert body is detachably mounted in the middle of the cover plate by fastening screws, and the cover plate is detachably mounted on the side wall of the mold.

[0011] Preferably, the cross-section of the groove and the insert block gradually decreases in the direction away from the forming surface.

[0012] Preferably, the insert block has a positioning groove, and one end of the connecting block has a positioning block, which is disposed inside the positioning groove.

[0013] Preferably, the through hole is clearance-fitted with the insert body.

[0014] The beneficial effects of this utility model are as follows: when it is necessary to replace the product insert, the fixed insert is pulled out through the through hole. When the fixed insert is pulled out, the first insert head of the fixed insert is displaced in the horizontal direction. The first insert head cooperates with the inclined surface of the inclined hole, driving the product insert to move away from the mold core and detach from the mold core.

[0015] Place the insert block of the product insert to be replaced into the groove of the mold core. The connecting block of the product insert will pass through the template and align with the guide hole. The fixing insert is inserted from the through hole reserved in the template. The insert body of the fixing insert is knocked into the guide hole. The first insert head enters the inclined hole of the product insert. The inclined hole and the inclined surface of the first insert head are matched. The product insert will move in a straight line along the groove. Install the product insert to the bottom of the groove.

[0016] Without disassembling the mold, the product inserts on the mold core can be replaced after the fixed inserts are pulled out, reducing the upper and lower molds and mold disassembly processes, and quickly realizing the interchangeable production of multiple types of products from one mold. It is especially suitable for molds with similar specifications, many varieties, and small unit production volume. Attached Figure Description

[0017] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0018] Figure 1 A schematic diagram of the structure of an injection mold for quick interchange of inserts according to an embodiment of the present invention; Figure 2 A cross-sectional view of an injection mold for quick-interchange of inserts according to an embodiment of the present invention; Figure 3 for Figure 1 A magnified view of a portion of region A in the middle; Figure 4 for Figure 2 A magnified view of a portion of region B in the middle; Figure 5 This is a schematic diagram of the structure of a fixing insert provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a product insert provided in an embodiment of the present utility model; The markings in the diagram are: 1: Template; 2: Mold core; 3: Product insert; 4: Fixing insert; 5: Inclined hole; 6: Guide element; 7: Through hole; 8: Cover plate; 9: Insert block; 10: Connecting block; 11: Insert body; 12: First insert head; 13: Second insert head. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0020] It should be noted that, in this utility model, unless otherwise stated, when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or may have an intervening element present simultaneously. "Inner" and "outer" refer to the inner and outer contours of a specific part. "Far" and "near" refer to the distance from or near to a certain component.

[0021] like Figures 1-6 As shown in the figure, an embodiment of the present invention provides an injection mold for quick-interchange of inserts, comprising: Template 1, the template 1 is provided with a guide element 6, the guide element 6 is provided with a guide hole, and the outer wall of the template 1 is provided with a through hole 7 that communicates with one end of the guide hole; Mold core 2, which is embedded in template 1; The product insert 3 is used to form the product. The mold core 2 has a groove. The product insert 3 is set inside the groove. One end of the product insert 3 has an inclined hole 5. The center line of the inclined hole 5 intersects the mold opening direction of the template 1 at an inclination. The inclined hole 5 is connected to the other end of the guide hole. The fixing insert 4 includes an insert body 11 and a first insert head 12. The first insert head 12 is fixed to one end of the insert body 11. One end of the insert body 11 is disposed inside the through hole 7, and the other end of the insert body 11 is sleeved inside the guide hole. The first insert head 12 is sleeved inside the inclined hole 5, and the end of the first insert head 12 away from the insert body 11 is inclined towards the parting surface of the mold core 2.

[0022] The insert body 11 is frustum-shaped or truncated pyramid-shaped. The end of the insert body 11 away from the first insert head 12 is interference-fitted with the guide hole, and the end of the insert body 11 near the first insert head 12 is clearance-fitted with the guide hole. This facilitates fixing the fixing insert 4 in the guide hole of the guide element 6 without the need for additional fastening elements, and also facilitates the removal of the fixing insert 4.

[0023] The product insert 3 includes an insert block 9 and a connecting block 10. One end of the insert block 9 has a molding surface, and the other end of the insert block 9 is detachably connected to the connecting block 10. The insert block 9 is disposed inside a groove, and the connecting block 10 penetrates the template 1. The inclined hole 5 is disposed in the middle of the connecting block 10. The insert block 9 located inside the mold core 2 is connected to the fixed insert 4 through the connecting block 10. The fixed insert 4 is offset from the mold core 2 by a certain distance to avoid interference and impact on the mold core 2 when replacing the fixed insert 4.

[0024] The centerline of the through hole 7 is perpendicular to the mold opening direction of the template 1, and the centerline of the guide hole is perpendicular to the mold opening direction of the template 1. The fixing insert 4 is inserted into the template 1 in the horizontal direction, and the insert body 11 of the fixing insert 4 is perpendicular to the mold opening direction to prevent the insert body 11 from accidentally sliding due to vibration of the template 1 during mold opening.

[0025] The guide element 6 is a block structure, and it is integrally formed with the template 1 or detachably connected by screws. The guide element 6 is set on the template 1 to avoid the need to drill deep guide holes in the mold core 2.

[0026] The fixing insert 4 also includes a second insert head 13. The first insert head 12 and the second insert head 13 are fixed to the same end of the insert body 11. The inclined hole 5 includes a first inclined hole and a second inclined hole. The first insert head 12 and the second insert head 13 are respectively disposed inside the first inclined hole and the second inclined hole. The first insert head 12 is inclinedly inserted into the first inclined hole, and the second insert head 13 is inclinedly inserted into the second inclined hole. The first insert head 12 cooperates with the inclined surface of the first inclined hole to drive one end of the product insert 3 to move linearly, and the second insert head 13 cooperates with the inclined surface of the second inclined hole to drive the other end of the product insert 3 to move linearly. The position and direction of movement of the product insert 3 are positioned by the first insert head 12 and the second insert head 13.

[0027] The inclination angles 'a' of the first inclined hole relative to the mold opening direction and 'b' of the second inclined hole relative to the mold opening direction satisfy the following relationship: a > 0, b > 0, a ≠ b. The different inclinations of the first insert head 12 and the second insert head 13 can prevent reverse installation and improve the accuracy of the fit between the inclined hole 5 and the inclined surface of the insert head, making the movement of the product insert 3 smoother.

[0028] The injection mold for quick-change inserts also includes a cover plate 8. One end of the insert body 11 is detachably mounted on the middle of the cover plate 8 via a fastening screw. The cover plate 8 is detachably mounted on the side wall of the template 1 via screws. When it is necessary to replace the product insert 3, simply remove the cover plate 8 on the outside of the template 1, and then use a pin puller to pull out the fixed insert 4. When the cover plate 8 is installed in place, the first insert head 12 and the second insert head 13 will be inserted into the inclined hole 5, and the first insert head 12 and the second insert head 13 will be installed in place. The installation of the product insert 3 can be confirmed by visually inspecting whether the cover plate 8 is installed in place.

[0029] The groove and the cross-section of the insert block 9 gradually decrease in the direction away from the molding surface. The groove allows the insert block 9 to be quickly positioned. When one end of the insert block 9 contacts the bottom of the groove, the insert block 9 is installed and positioned on the mold core 2.

[0030] The insert block 9 has a positioning groove, and the connecting block 10 has a positioning block at one end, which is located inside the positioning groove. The connecting block 10 is quickly positioned onto the insert block 9.

[0031] The through hole 7 is clearance-fitted with the insert body 11. A reserved space is provided in the through hole 7 to facilitate the connection of the pin puller to the insert body 11.

[0032] When it is necessary to replace the product insert 3, simply remove the cover plate 8 and pull out the fixing insert 4 through the through hole 7. When the fixing insert 4 is pulled out, the insert head of the fixing insert 4 moves horizontally, and the insert head engages with the inclined surface of the inclined hole 5. The product insert 3 moves away from the mold core 2 and disengages from the mold core 2. Because the product insert 3 and the groove have a tapered fit, when the product insert 3 separates from the bottom of the groove, the product insert 3 is in a loose state and can be directly removed.

[0033] Place the insert block 9 of the product insert 3 to be replaced into the groove of the mold core 2. The connecting block 10 of the product insert 3 will penetrate the template 1 and align with the guide hole. The fixing insert 4 is inserted through the pre-drilled through hole 7 in the template 1. Tap the insert body 11 of the fixing insert 4 into the guide hole, so that the first insert head 12 at the end of the insert body 11 enters the inclined hole 5 of the insert block 9 of the product insert 3. The inclined hole 5 and the inclined surface of the first insert head 12 cooperate, so that one end of the insert block 9 of the product insert 3 is embedded into the bottom of the groove, and the product insert 3 is installed in place. Cover with the cover plate 8, and the replacement of the product insert 3 is completed.

[0034] In one embodiment, the through hole 7 is formed on the outer wall of the template 1, the guide hole is formed on the side wall of the mold core 2, the product insert 3 includes an insert block 9, the inclined hole 5 is disposed in the middle of the insert block 9, one end of the guide hole communicates with the through hole 7, and the other end of the guide hole communicates with the inclined hole 5. The centerline of the inclined hole 5 intersects the mold opening direction of the template 1 at an inclination.

[0035] In one embodiment, a spring is provided at the bottom of the groove, and one end of the spring contacts the insert block 9. The spring drives the insert block 9 to eject from the mold core 2. The insert block 9 is fixed inside the groove by the insert head of the fixing insert 4.

[0036] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these should all be considered to be within the scope of this specification.

Claims

1. An injection mold with quick-interchange inserts, characterized in that: include: The template is provided with a guide element, the guide element has a guide hole, and the outer wall of the template has a through hole communicating with the guide hole; Mold core, wherein the mold core is embedded in the template; The product insert is used to form the product. The mold core has a groove, the product insert is placed inside the groove, and one end of the product insert has an inclined hole. The center line of the inclined hole intersects the mold opening direction of the template at an inclination. A fixed insert, comprising an insert body and a first insert head, the first insert head being fixed to one end of the insert body, one end of the insert body being disposed inside a through hole, the other end of the insert body being sleeved inside a guide hole, the first insert head being sleeved inside an inclined hole, and the end of the first insert head away from the insert body being inclined toward the parting surface of the mold core.

2. The injection mold for quick-interchange inserts according to claim 1, characterized in that: The product insert includes an insert block and a connecting block. One end of the insert block has a shaped surface, and the other end of the insert block is detachably connected to the connecting block. The insert block is set inside the groove, the connecting block passes through the template, and the inclined hole is set in the middle of the connecting block.

3. The injection mold for quick-interchange inserts according to claim 1, characterized in that: The centerline of the through hole is perpendicular to the mold opening direction of the template, and the centerline of the guide hole is perpendicular to the mold opening direction of the template.

4. The injection mold for quick-interchange inserts according to claim 1, characterized in that: The guide element is a block structure, and the guide element is integrally formed with the template or can be detachably connected.

5. The injection mold for quick-interchange inserts according to claim 1, characterized in that: The fixing insert also includes a second insert head, the first insert head and the second insert head are fixed to the same end of the insert body, and the inclined hole includes a first inclined hole and a second inclined hole, the first insert head and the second insert head are respectively disposed inside the first inclined hole and the second inclined hole.

6. The injection mold for quick-interchange of inserts according to claim 5, characterized in that: The inclination angle 'a' of the first oblique hole relative to the mold opening direction and the inclination angle 'b' of the second oblique hole relative to the mold opening direction satisfy the following relationship: a > 0, b > 0, a ≠ b.

7. The injection mold for quick-interchange inserts according to claim 1, characterized in that: The injection mold with quick-change inserts also includes a cover plate. One end of the insert body is detachably mounted in the middle of the cover plate by fastening screws, and the cover plate is detachably mounted on the side wall of the mold.

8. The injection mold for quick-interchange inserts according to claim 2, characterized in that: The cross-section of the groove and the insert gradually decreases in the direction away from the forming surface.

9. The injection mold for quick-interchange inserts according to claim 2, characterized in that: The insert block has a positioning groove, and the connecting block has a positioning block at one end, with the positioning block located inside the positioning groove.

10. The injection mold for quick-interchange inserts according to claim 1, characterized in that: The through hole is fitted with the insert body with a clearance.

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