Injection mold capable of preventing slide from retreating
By introducing a limit block and wear-resistant plate into the injection mold, the problems of shovel base wear and slide block backing were solved, improving product yield, extending mold life and reducing maintenance costs.
Patent Information
- Application Number
- CN202520024672.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-07
AI Technical Summary
In the long-term use of existing injection molds, wear between the shovel base and the lower mold plate causes the shovel base to shift, resulting in problems such as burrs and rough edges on the product. Furthermore, the limiting structure is not effective in preventing the slide block from moving backward.
By detachably embedding a limiting block at the lower end of the shovel base and cooperating with the lower mold insert on the lower template, the design of the back shovel slope and the abutment slope ensures accurate displacement of the shovel base and prevents the slide block from retreating. At the same time, the use of wear-resistant plates and detachable design extends the service life of mold components.
It enables accurate displacement of the shovel base during mold closing, prevents slide block retraction, avoids product defects, extends mold life, and reduces maintenance and production costs.
Smart Images
Figure CN223763656U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold with anti-reverse sliding mechanism. Background Technology
[0002] Currently, the spade base of injection molds is mainly used to push and press the slide block. On the one hand, during the mold closing process, the spade base is used to push the slide block to a predetermined position. On the other hand, during the injection process, the spade base is used to press the slide block to prevent the slide block from retracting due to the injection pressure.
[0003] In the prior art, in order to ensure that the shovel base does not shift, a limit block or limit structure is usually set to limit the stroke position of the shovel base. The shovel base is generally provided with a backshovel slope on the side away from the slide block. The lower mold plate is provided with a mating slope corresponding to the backshovel slope. The cooperation between the backshovel slope and the mating slope can prevent the shovel base from shifting, so that the shovel base always abuts against the slide block and does not loosen after the mold is closed.
[0004] However, due to the long-term use of the mold, the materials used for the shovel base and the lower mold plate are different, resulting in differences in hardness. Generally, the shovel base has higher hardness. The shovel base will cause wear on the abutting slope of the lower mold plate, causing the shovel base to shift and unable to continue pressing the slide block. As a result, the rubber material overflows from the PL surface of the mold, which over time makes the product prone to problems such as burrs and rough edges. Utility Model Content
[0005] The purpose of this invention is to provide an injection mold with a slide anti-retraction feature, which aims to solve or at least partially solve the shortcomings of the aforementioned background technology. It can avoid wear between the shovel base and the lower mold plate, and not only ensure that the shovel base is accurately displaced to the predetermined position to push the slide slider during the mold closing process, but also prevent the slide slider from retracting during the injection process, thereby preventing the product from producing burrs and rough edges, and improving the product yield.
[0006] This utility model provides an injection mold for preventing slide retraction, including an upper mold plate and a lower mold plate. A cavity for molding a product is provided between the upper mold plate and the lower mold plate. A slide block is slidably provided on the lower mold plate. The slide block, the upper mold plate, and the lower mold plate together form the cavity. The upper mold plate is provided with a shovel base for driving the slide block to slide. A limiting block is detachably embedded at the lower end of the shovel base. A limiting groove is provided at the connection between the outer side of the limiting block and its lower surface. A lower mold insert that cooperates with the limiting groove is detachably provided on the lower mold plate.
[0007] When the mold is closed, the lower mold insert abuts against the limiting groove of the shovel base to prevent the lower end of the shovel base from colliding with the lower template, while guiding the shovel base to the predetermined position.
[0008] Furthermore, the limiting block has a backhoe inclined surface and a limiting surface, which are respectively set on the side wall and top wall of the limiting groove.
[0009] Furthermore, the lower mold insert has an abutting slope that matches the anti-scraper slope; when the mold is closed, the abutting slope abuts against the anti-scraper slope, and the limiting surface abuts against the upper surface of the lower mold insert.
[0010] Furthermore, the inclination of the contact slope is consistent with the inclination of the backhoe slope.
[0011] Furthermore, a chamfered structure is provided at the connection between the backhoe ramp and the lower surface of the limiting block.
[0012] Furthermore, the distance between the limiting surface and the lower surface of the limiting block is less than the vertical height of the lower mold insert.
[0013] Furthermore, the upper surface of the lower template is recessed with a mounting groove that can accommodate the lower mold insert, and the lower mold insert is installed in the mounting groove.
[0014] Furthermore, the sliding block has a retaining groove that mates with the shovel base, the inward-facing side of the shovel base has a guide slope, and the groove wall of the retaining groove has a mating slope that mates with the guide slope.
[0015] Furthermore, the inclination of the guiding slope is consistent with the inclination of the mating slope.
[0016] Furthermore, a wear-resistant plate is detachably embedded on the guide slope of the shovel; when the mold is closed, the wear-resistant plate abuts against the mating slope.
[0017] The injection mold with anti-reverse sliding mechanism provided by this utility model achieves reciprocating sliding of the sliding block on the lower mold plate by the cooperation of the shovel base and the sliding block. By cooperating with the limit block and the lower mold insert, the shovel base can fall to the predetermined position when the mold is closed, thus ensuring that the sliding block slides to the predetermined position. Moreover, the shovel base always abuts against the lower mold insert, thereby preventing the sliding block from retreating due to injection pressure during the injection process, preventing the plastic material from overflowing from the PL surface of the mold, and thus preventing defects such as burrs and flashes on the product, thereby improving the product yield. The detachable setting of the limit block and the lower mold insert effectively avoids direct wear of the shovel base and the lower mold plate, and the limit block and the lower mold insert are easy to replace, thereby extending the service life of the mold and reducing production costs. Attached Figure Description
[0018] Figure 1 This is a cross-sectional schematic diagram of an injection mold for preventing slippage according to the present invention.
[0019] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the limiting block.
[0020] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the lower mold insert.
[0021] Figure 4 for Figure 1 The diagram shows a three-dimensional representation of the shovel base.
[0022] Figure 5 for Figure 1 The diagram shows a three-dimensional representation of the slider. Detailed Implementation
[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0024] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0025] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.
[0026] Please see Figure 1 , Figure 2 and Figure 4 An injection mold for preventing slippage includes an upper mold plate 10 and a lower mold plate 20. A cavity 30 for molding products is provided between the upper mold plate 10 and the lower mold plate 20. A sliding slider 21 is slidably provided on the lower mold plate 20. The sliding slider 21, the upper mold plate 10, and the lower mold plate 20 together form the cavity 30.
[0027] The upper template 10 is provided with a shovel base 11 for driving the sliding slider 21 to slide. A limiting block 12 is detachably embedded at the lower end of the shovel base 11. A limiting groove 121 is opened at the connection between the outer side of the limiting block 12 and its lower surface. A lower mold insert 22 that cooperates with the limiting groove 121 is detachably provided on the lower template 20.
[0028] When the mold is closed, the lower mold insert 22 abuts against the limiting groove 121 of the shovel base 11 to prevent the lower end of the shovel base 11 from colliding with the lower template 20, and at the same time guides the shovel base 11 to move to the predetermined position.
[0029] As described above, the injection mold with anti-retraction mechanism provided by this utility model, through the cooperation of the shovel base 11 and the slide block 21, enables the shovel base 11 to drive the slide block 21 to reciprocate on the lower mold plate 20; through the cooperation of the limiting block 12 and the lower mold insert 22, the shovel base 11 can fall to a predetermined position when the mold is closed, thereby ensuring that the slide block 21 slides to the predetermined position, and the shovel base 11 is always in contact with the lower mold insert 22, thereby preventing the slide block 21 from retracting due to injection pressure during the injection process, preventing the glue from overflowing from the PL surface of the mold, thereby preventing defects such as burrs and rough edges from forming on the product, and improving the product yield; through the detachable setting of the limiting block 12 and the lower mold insert 22, the direct wear of the shovel base 11 and the lower mold plate 20 is effectively avoided, and the limiting block 12 and the lower mold insert 22 are easy to replace, thereby extending the service life of the mold and reducing production costs.
[0030] Please see Figures 1-3 The limiting block 12 has a backhoe slope 122 and a limiting surface 123, which are respectively disposed on the side wall and top wall of the limiting groove 121. More specifically, the lower mold insert 22 has an abutting slope 221 that cooperates with the backhoe slope 122; when the mold is closed, the abutting slope 221 abuts against the backhoe slope 122, and the limiting surface 123 abuts against the upper surface of the lower mold insert 22.
[0031] The backhoe bevel 122 cooperates with the abutment bevel 221 to guide the shovel base 11, guiding it to fall to the accurate position, thus ensuring that the slide block 21 slides to the predetermined position. It also prevents the slide block 21 from retracting due to injection pressure during the injection process. The limiting surface 123 abuts against the upper surface of the lower mold insert 22, effectively limiting the falling stroke of the shovel base 11 and preventing excessive falling stroke that could cause displacement or the lower end of the shovel base 11 impacting the lower mold plate 20.
[0032] Furthermore, the inclination of the abutting slope 221 is consistent with the inclination of the backhoe slope 122. This arrangement not only makes the fit between the lower mold insert 22 and the limiting block 12 smoother and more precise, but also effectively reduces the wear between the two, increases the service life of the lower mold insert 22 and the limiting block 12, and further reduces maintenance costs.
[0033] Please see Figure 2 A chamfered structure 124 is provided at the connection between the backhoe slope 122 and the lower surface of the limiting block 12. The chamfered structure 124 can effectively prevent the corners of the limiting block 12 and the lower mold insert 22 from colliding, and can better guide the limiting block 12 and the lower mold insert 22 to abut against each other when the mold is closed.
[0034] In addition, the chamfer structure 124 can be a bevel or a rounded corner. In this embodiment, the chamfer structure 124 is a rounded corner.
[0035] Please see Figures 2-4 The lower surface of the limiting block 12 is in the same plane as the lower surface of the shovel base 11. The distance L between the limiting surface 123 and the lower surface of the limiting block 12 is less than the vertical height H of the lower mold insert 22. This setting can limit the falling stroke of the shovel base 11 and prevent the lower end of the shovel base 11 from hitting the lower template 20.
[0036] Please see Figure 1 The upper surface of the lower template 20 is recessed with an installation groove 23 that can accommodate the lower mold insert 22. The lower mold insert 22 is installed in the installation groove 23, which makes the installation of the lower mold insert 22 more stable and prevents the lower mold insert 22 from shifting after long-term use of the mold, thus affecting the guiding effect on the shovel base 11.
[0037] The lower die insert 22 can be made of 2510 alloy oil steel or SKD61 hot work alloy steel, and the limiting block 12 can also be made of 2510 alloy oil steel or SKD61 hot work alloy steel. Both 2510 alloy oil steel and SKD61 hot work alloy steel have high hardness and good wear resistance. In this embodiment, the limiting block 12 is made of SKD61 hot work alloy steel, and the lower die insert 22 is made of 2510 alloy oil steel.
[0038] Please see Figure 4 and Figure 5 The sliding block 21 has a retaining groove 211 that mates with the shovel base 11. The inward-facing side of the shovel base 11 has a guide slope 111, and the groove wall of the retaining groove 211 has a mating slope 2111 that mates with the guide slope 111. Through the mating of the guide slope 111 and the mating slope 2111, the shovel base 11 pushes the sliding block 21 to slide towards the cavity 30 to a predetermined position during mold closing.
[0039] Furthermore, the inclination of the guide slope 111 is consistent with the inclination of the mating slope 2111. This setting not only makes the mating of the shovel base 11 and the sliding block 21 smoother and more precise, but also effectively reduces the wear between the two, increases the service life of the shovel base 11 and the sliding block 21, and further reduces maintenance costs.
[0040] More specifically, the cross-section of the retaining groove 211 is T-shaped, the sliding block 21 has a retaining protrusion 212, and the shovel base 11 is recessed with an inclined guide groove 112 corresponding to the retaining protrusion 212. The retaining protrusion 212 is retained in the inclined guide groove 112, so that when the mold is opened, the shovel base 11 can drive the sliding block 21 to slide in a direction away from the product.
[0041] Furthermore, a wear-resistant plate 13 is detachably embedded in the guide slope 111 of the shovel base 11; when the mold is closed, the wear-resistant plate 13 abuts against the mating slope 2111. The wear-resistant plate 13 can prevent wear on the guide slope 111 of the shovel base 11, and the wear-resistant plate 13 is easy to replace, thereby extending the service life of the shovel base 11 and reducing maintenance and production costs.
[0042] The wear-resistant plate 13 can be made of 2510 alloy oil steel or SKD61 hot work alloy steel. In this embodiment, the wear-resistant plate 13 is made of SKD61 hot work alloy steel.
[0043] The advantages of the injection mold with anti-recoil mechanism provided by this utility model include:
[0044] (1) When the mold is closed, it can ensure that the slide block 21 slides accurately to the predetermined position.
[0045] (2) During injection molding, it can prevent the slide block 21 from moving backward, thereby improving the product yield.
[0046] (3) It effectively avoids direct wear of the shovel base 11 and the lower template 20, thereby extending the service life of the mold and reducing maintenance and production costs.
[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A row position anti-retreating injection mold, comprising an upper mold plate (10) and a lower mold plate (20), a cavity (30) for forming a product is arranged between the upper mold plate (10) and the lower mold plate (20), a row position slider (21) is slidingly arranged on the lower mold plate (20), the row position slider (21), the upper mold plate (10) and the lower mold plate (20) jointly enclose the cavity (30), the upper mold plate (10) is provided with a spade base (11) for driving the row position slider (21) to slide, characterized in that, The lower end of the shovel base (11) is detachably embedded with a limiting block (12), and a limiting groove (121) is formed at the junction of the outer side of the limiting block (12) and the lower surface thereof; and a lower mold insert (22) is detachably arranged on the lower mold plate (20) and cooperates with the limiting groove (121). When the mold is closed, the lower mold insert (22) abuts against the limiting groove (121) of the shovel base (11) to prevent the lower end of the shovel base (11) from colliding with the lower mold plate (20) and guide the shovel base (11) to displace to a predetermined position.
2. The injection mold with anti-ejection of the row according to claim 1, characterized in that, The limiting block (12) has a backhoe inclined surface (122) and a limiting surface (123), and the backhoe inclined surface (122) and the limiting surface (123) are arranged on the side wall and the top wall of the limiting groove (121), respectively.
3. The injection mold of claim 2, wherein, The lower mold insert (22) is provided with an abutting inclined surface (221) cooperating with the backhoe inclined surface (122); when the mold is closed, the abutting inclined surface (221) abuts against the backhoe inclined surface (122), and the limiting surface (123) abuts against the upper surface of the lower mold insert (22).
4. The injection mold of claim 3, wherein, The inclination of the abutting inclined surface (221) is consistent with the inclination of the backhoe inclined surface (122).
5. The injection mold of claim 2, wherein, The junction of the backhoe inclined surface (122) and the lower surface of the limiting block (12) is provided with a chamfer structure (124).
6. The injection mold of claim 2, wherein, The distance between the limiting surface (123) and the lower surface of the limiting block (12) is less than the vertical height of the lower mold insert (22).
7. The injection mold of claim 1, wherein, The upper surface of the lower mold plate (20) is concavely provided with a mounting groove (23) capable of accommodating the lower mold insert (22), and the lower mold insert (22) is mounted in the mounting groove (23).
8. The injection mold of claim 1, wherein, The row position sliding block (21) is provided with a clamping groove (211) cooperating with the shovel base (11), and the inner side of the shovel base (11) is provided with a guide inclined surface (111), and the groove wall of the clamping groove (211) is provided with a matching inclined surface (2111) cooperating with the guide inclined surface (111).
9. The injection mold of claim 8, wherein, The inclination of the guide inclined surface (111) is consistent with the inclination of the matching inclined surface (2111).
10. The injection mold of claim 8, wherein, The shovel base (11) is detachably embedded with a wear plate (13) on the guide inclined surface (111); when the mold is closed, the wear plate (13) abuts against the matching inclined surface (2111).