A demolding ejection tool for a silicone mold

Abstract

This utility model relates to the field of demolding technology for silicone product molding molds, specifically a demolding ejection fixture for silicone molds. It includes a square base plate, multiple ejector components arranged in an array on the upper side of the square base plate, and multiple symmetrical clamping support assemblies also arranged on the upper side of the square base plate. The upper side of the square base plate has multiple threaded mounting holes arranged in an array. Each ejector component includes a threaded connecting post, a nylon fracture guide section, and an ejector nylon rod. The threaded connecting post is threadedly connected to the corresponding threaded mounting hole. The nylon fracture guide section is integrally formed at the upper end of the threaded connecting post, and the ejector nylon rod is integrally formed at the upper end of the nylon fracture guide section. This demolding ejection fixture is adaptable to multiple mold specifications, improving versatility. It allows for easy replacement of broken components. The pre-set fracture zone and independent pad design reduce maintenance costs and downtime. It limits the displacement of the ejector components, preventing accidental breakage without hindering the removal of residual parts, facilitating maintenance.

Description

Technical Field

[0001] This utility model relates to the field of demolding technology for silicone product molding molds, specifically a demolding ejection tool for silicone molds. Background Technology

[0002] The silicone industry is one of the important basic industries of the national economy. It not only provides essential daily-use and medical silicone products, but also supplies various silicone production equipment and components to heavy industries and emerging industries such as mining, transportation, construction, machinery, and electronics. Clearly, the silicone industry offers a wide variety of products with broad applications. For small silicone products, to improve production efficiency, mold designs often employ multi-cavity structures (ranging from dozens to hundreds), enabling the molding of multiple products in a single operation. This significantly reduces mold costs while substantially increasing production efficiency.

[0003] Existing silicone mold ejection fixtures typically use a fixed connection between the square base plate and multiple ejector components. This prevents flexible adjustment of the ejector component layout and quantity according to mold specifications, resulting in a fixture that can usually only be used for a single mold model, leading to poor versatility and increased equipment investment costs. Furthermore, the ejector components are mostly integral structures lacking pre-designed fracture protection. If they break due to overload, the fragments can easily become stuck in the mounting position and are difficult to remove. Replacement requires disassembling the entire fixture structure, which is not only cumbersome and costly to maintain, but also causes prolonged downtime and seriously affects production progress. Utility Model Content

[0004] The purpose of this utility model is to provide a demolding and ejection fixture for silicone molds, which solves the problems of existing silicone mold demolding and ejection fixtures where the square base plate and ejector are fixedly connected, making it difficult to adjust the layout and quantity according to mold specifications, resulting in poor versatility and high equipment costs; the ejector is an integral piece without fracture protection, and after overload fracture, the residue is difficult to remove, and replacement requires disassembly of the whole, which is cumbersome, costly, and causes long downtime, affecting production.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a demolding ejection fixture for silicone molds, comprising a square base plate, a plurality of ejector components arranged in an array on the upper side of the square base plate, and a plurality of symmetrical clamping support assemblies arranged on the upper side of the square base plate; the upper side of the square base plate is provided with a plurality of threaded mounting holes arranged in an array; the ejector components include threaded connecting posts, nylon fracture guide sections, and ejection nylon rods, the threaded connecting posts being threadedly connected to the corresponding threaded mounting holes, the nylon fracture guide sections being integrally formed on the upper end of the threaded connecting posts, and the ejection nylon rods being integrally formed on the upper end of the nylon fracture guide sections; the symmetrical clamping support assemblies clamp the outer wall of the nylon fracture guide sections, and their upper end faces are tightly fitted with the lower end faces of the ejection nylon rods.

[0006] Furthermore, the symmetrical clamping support assembly includes two pads and multiple semi-circular slots; the two pads are symmetrically arranged on the upper side of the square base plate; the multiple semi-circular slots are respectively located on opposite sides of the two pads; each row of horizontally arranged nylon fracture guide segments corresponds to a set of symmetrically arranged pads, and the outer wall of the nylon fracture guide segment is in contact with the inner wall of the corresponding two semi-circular slots; the upper and lower end faces of the pads are respectively in close contact with the lower end face of the ejected nylon rod and the upper side of the square base plate.

[0007] Furthermore, the pad is connected to the upper side of the square base plate by two screws; and the two screws are respectively located on both sides of the plurality of semi-circular slots.

[0008] Furthermore, the radius of the semi-circular groove is adapted to the outer diameter of the nylon fracture guide section; the diameter of the nylon fracture guide section is smaller than the diameter of the ejected nylon rod and the threaded connecting post, respectively; the height of the nylon fracture guide section is 15mm and the diameter is 7mm; the diameter of the ejected nylon rod and the threaded connecting post are both 8mm.

[0009] Furthermore, the upper end of the ejected nylon rod is provided with an arc-shaped chamfer with a radius of R=2mm.

[0010] Furthermore, two positioning grooves are provided at intervals on both sides of the square base plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention utilizes an array of ejector components that interact with the threaded mounting holes on a square base plate. This not only allows for flexible adaptation to silicone molds of different specifications, improving tooling versatility, but also enables convenient replacement of individual ejector components in case of breakage. The diameter difference of the nylon fracture guide section forms a pre-defined fracture zone, providing a convenient force application point for maintenance. Combined with the independent pad layout in each row, the replacement of a single ejector component does not require affecting the entire structure, reducing maintenance costs and downtime. The symmetrical clamping support assembly, through the clamping of the nylon fracture guide section with a semi-circular slot and the tight fit of the upper and lower end faces, restricts the lateral swaying and axial movement of the ejector component, reducing the probability of unexpected breakage from the root cause. At the same time, it does not hinder the removal of broken remnants, further improving maintenance convenience. Attached Figure Description

[0013] Figure 1 This is a top view schematic diagram of the demolding and ejection tooling for silicone molds according to the present invention;

[0014] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0015] Figure 3 This is a cross-sectional schematic diagram of the demolding and ejection tooling for silicone molds according to the present invention.

[0016] Figure 4 This is a schematic diagram of the structure of the pad of this utility model;

[0017] Figure 5 This is a side view of the demolding and ejection fixture for silicone molds according to the present invention.

[0018] Figure 6 This is a schematic diagram of the square base plate of this utility model.

[0019] In the diagram: 1. Square base plate; 2. Positioning groove; 3. Threaded mounting hole; 4. Ejector; 5. Ejector nylon rod; 6. Nylon fracture guide section; 7. Threaded connecting post; 8. Pad; 9. Semi-circular slot. Detailed Implementation

[0020] Please see Figure 1-6 A demolding and ejection fixture for silicone molds includes a square base plate 1 and multiple ejector components 4 arranged in an array on the upper side of the square base plate 1. The square base plate 1 is made of 45# steel plate with a side length of 490mm and a thickness of 10mm. It also includes multiple symmetrical clamping and supporting assemblies arranged on the upper side of the square base plate 1. Multiple threaded mounting holes 3 are arranged in an array on the upper side of the square base plate 1. These threaded mounting holes 3 are arranged in three groups on the square base plate 1, each group containing 156 M8 threaded holes (for installing subsequent ejector nylon rods 5), and each group is distributed in a 13×4 row and column configuration. The three groups of threaded mounting holes 3 are arranged horizontally along the vertical direction, and the center distance between the front, back, left, and right holes in each group is 33mm. The vertical center-to-center distance between two adjacent sets of holes is 46mm, and the horizontal center-to-center distance is still 33mm; each threaded mounting hole 3 is pre-installed with a threaded sleeve of size M8; the ejector 4 includes a threaded connecting post 7, a nylon fracture guide section 6, and an ejector nylon rod 5. The threaded connecting post 7 is threadedly connected to the corresponding threaded mounting hole 3. The nylon fracture guide section 6 is integrally formed on the upper end of the threaded connecting post 7, and the ejector nylon rod 5 is integrally formed on the upper end of the nylon fracture guide section 6; the threaded connecting post 7 adopts a standard M8 thread structure with a length of 10mm, and its bottom is machined with a 45° straight chamfer with a width of 1.5mm; the symmetrical clamping support assembly is clamped on the outer wall of the nylon fracture guide section 6, and its upper end face is tightly fitted with the lower end face of the ejector nylon rod 5.

[0021] The symmetrical clamping support assembly includes two pads 8 and multiple semi-circular slots 9; the two pads 8 are fixed to the upper side of the square base plate 1 by screws and are symmetrically distributed; the multiple semi-circular slots 9 are respectively located on the opposite side of the two pads 8; each row of horizontally arranged nylon fracture guide segments 6 corresponds to a set of symmetrically arranged pads 8, and the outer wall of the nylon fracture guide segment 6 is in contact with the inner wall of the corresponding two semi-circular slots 9; the upper and lower end faces of the pads 8 are in close contact with the lower end face of the ejected nylon rod 5 and the upper side of the square base plate 1, respectively.

[0022] Two symmetrically arranged pads 8 form a ring-like clamping effect on the nylon fracture guide section 6 through semi-circular slots 9, which can limit the lateral swaying of the ejector part 4 during the ejection process and ensure that the ejected nylon rod 5 is aligned with the mold hole. The tight fit between the upper and lower end faces of the pads 8 provides vertical support for the ejector part 4, disperses the pressure during ejection, and prevents the ejector part 4 from bending or breaking due to uneven force. At the same time, the layout of each row of nylon fracture guide sections 6 corresponding to a set of pads 8 means that when a certain ejector part 4 breaks, only the pad 8 corresponding to the row of ejector part 4 needs to be removed to replace the damaged ejector part 4 individually, without affecting the support structure of other rows. This improves the targeting and efficiency of maintenance and reduces the overall downtime for tooling maintenance.

[0023] The pad 8 is connected to the upper side of the square base plate 1 by two screws. The two screws pass through the mounting holes on both sides of the pad 8 and engage with the threaded holes on the upper side of the square base plate 1 to secure the pad 8 tightly against the square base plate 1. The two screws are located on both sides of the multiple semi-circular slots 9. The screw connection method ensures that the pad 8 and the square base plate 1 are firmly connected, preventing the pad 8 from shifting or loosening due to force during the ejection process. At the same time, if a certain ejection nylon rod 5 breaks, the pad 8 at the corresponding position can be removed. By applying force with the exposed part of the broken nylon guide section 6, the threaded connecting post 7 can be easily unscrewed from the threaded mounting hole 3 of the square base plate 1, simplifying the replacement process of a single ejector part 4 and reducing tooling maintenance time.

[0024] The radius of the semi-circular groove 9 is matched with the outer diameter of the nylon fracture guide section 6, ensuring that the symmetrical clamping support assembly can clamp the ejector part 4, avoiding lateral displacement during ejection and improving ejection stability. The diameter of the nylon fracture guide section 6 is smaller than the diameters of the ejector nylon rod 5 and the threaded connecting post 7, so that its upper and lower ends form a stepped structure with the ejector nylon rod 5 and the threaded connecting post 7, respectively. Combined with the clamping effect of the semi-circular groove 9, it can axially limit the ejector part 4, preventing axial movement caused by force during ejection. At the same time, the reduced diameter structure also provides a preset fracture zone for the ejector part 4, reducing the risk of damage to the core components under overload.

[0025] The nylon fracture guide section 6 has a height of 15mm and a diameter of 7mm; the ejector nylon rod 5 and the threaded connecting post 7 both have a diameter of 8mm. The diameter of the nylon fracture guide section 6 is smaller than that of the ejector nylon rod 5 and the threaded connecting post 7, forming a weak area in the structure. When an unexpected overload occurs during the ejection process, it can break first from the reduced diameter section, avoiding damage to the ejector nylon rod 5 or the threaded connecting post 7 and the threaded mounting hole 3 of the square base plate 1 due to forced force. The 15mm height provides sufficient clamping space for the pad plate 8 and ensures the overall structural stability of the ejector 4.

[0026] The upper end of the ejector nylon rod 5 is provided with an arc-shaped chamfer with a radius of R=2mm. When ejecting silicone products, the arc-shaped transition structure can prevent the upper end of the ejector nylon rod 5 from causing scratches or indentations on the product surface. At the same time, it can disperse the contact stress at the moment of ejection, prevent the thin silicone products from deforming or breaking due to localized stress concentration, and ensure the integrity of the product's appearance and dimensional accuracy. In addition, the arc-shaped chamfer can reduce the frictional resistance between the ejector rod and the product during ejection, making the ejection action smoother and reducing the probability of the product remaining in the mold cavity.

[0027] Two positioning grooves 2 are spaced apart on both sides of the square base plate 1. The positioning grooves 2 are symmetrically distributed along the center line of the square base plate 1, with a groove width of 16mm ± 1mm. The distance between the edge of the groove and the side of the square base plate 1 is 137mm, and the distance between the two positioning grooves 2 on the same side is 184mm. The two positioning grooves 2 can be adapted to the positioning structure of the ejector plate of the flat vulcanizing machine. After being tightened with M12 screws, the tooling and equipment can be positioned and installed, ensuring that the matrix arrangement of the ejector parts 4 corresponds one-to-one with the position of the mold hole in the middle plate of the mold. This avoids the misalignment of the ejector nylon rod 5 with the mold hole due to tooling offset, thereby reducing the risk of nylon rod breakage or product deformation during ejection.

[0028] Working process and principle: During operation, the tooling is first fixed to the ejector plate slot of the flat vulcanizing machine with M12 screws through the positioning grooves 2 on both sides of the square base plate 1 to ensure that the ejector part 4 corresponds to the mold hole position of the middle plate of the silicone mold; the ejector part 4 is fixed to the threaded mounting hole 3 of the square base plate 1 through the threaded connecting post 7, and its nylon fracture guide section 6 is tightly clamped by the two pads 8 of the symmetrical clamping support component through the semi-circular slot 9. The pads 8 are fixed to the square base plate 1 with screws to form a stable support structure. When the mold platen descends, the ejector plate of the flat vulcanizing machine drives the square base plate 1 to rise. The ejector nylon rod 5 passes through the mold hole of the mold platen and uses its upper end R=2mm arc chamfer to smoothly contact the silicone product, ejecting the product from the mold cavity. The symmetrical clamping support assembly provides vertical support and limit for the ejector nylon rod 5 through the tight fit of the upper and lower end faces of the pad plate 8, avoiding product damage due to force deviation during ejection. At the same time, the design of the nylon fracture guide section 6 (diameter 7mm) being smaller than the ejector nylon rod 5 and the threaded connecting post 7 (diameter 8mm) ensures that it breaks first from the diameter reduction point when under force, which is convenient for subsequent maintenance and replacement, and finally realizes the batch demolding of silicone products.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A demolding ejection tool for a silicone mold, comprising a square base plate (1), a plurality of ejectors (4) arranged in an array on the upper side of the square base plate (1), characterized in that, Also include a plurality of symmetric clamping support components on the upper side of the square base plate (1); The upper side of the square base plate (1) is provided with a plurality of threaded mounting holes (3) arranged in an array; The ejector (4) includes a threaded connecting column (7), a nylon fracture guide section (6) and an ejecting nylon rod (5), the threaded connecting column (7) is threadedly connected with the corresponding threaded mounting hole (3), the nylon fracture guide section (6) is integrally formed at the upper end of the threaded connecting column (7), and the ejecting nylon rod (5) is integrally formed at the upper end of the nylon fracture guide section (6); The symmetric clamping support component is clamped to the outer wall of the nylon fracture guide section (6), and the upper end face thereof is closely attached to the lower end face of the ejecting nylon rod (5).

2. The ejection tooling of claim 1, wherein, The symmetric clamping support component includes two pads (8) and a plurality of semicircular clamping grooves (9); The two pads (8) are symmetrically arranged on the upper side of the square base plate (1); The plurality of semicircular clamping grooves (9) are respectively arranged on the opposite sides of the two pads (8); Each row of horizontally arranged nylon fracture guide sections (6) corresponds to a group of symmetrically arranged pads (8), and the outer wall of the nylon fracture guide section (6) is attached to the inner wall of the corresponding two semicircular clamping grooves (9); The upper and lower end faces of the pad (8) are respectively closely attached to the lower end face of the ejecting nylon rod (5) and the upper side of the square base plate (1).

3. The ejection tooling of claim 2, wherein, The pad (8) and the upper side of the square base plate (1) are connected by two screws; And the two screws are respectively located on the two sides of the plurality of semicircular clamping grooves (9).

4. The ejection tooling of claim 2, wherein, The radius of the semicircular clamping groove (9) is matched with the outer diameter of the nylon fracture guide section (6); The diameter of the nylon fracture guide section (6) is smaller than the diameter of the ejecting nylon rod (5) and the threaded connecting column (7); The height of the nylon fracture guide section (6) is 15mm, and the diameter is 7mm; The diameter of the ejecting nylon rod (5) and the threaded connecting column (7) is 8mm.

5. The ejection tooling of claim 1, wherein, The upper end of the ejecting nylon rod (5) is provided with an arc chamfer with a radius of R=2mm.

6. The ejection tool of claim 1, wherein, Both sides of the square base plate (1) are provided with two positioning grooves (2) arranged at intervals.

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