A mold for producing a carabiner product

Abstract

The present application relates to a kind of preparation mould of pull buckle product, including upper die and lower die, still including with lower die cooperation product forming cavity of constituting shaped block one and shaped block two, upper die cavity is opened in upper die, upper die cavity periphery is opened in upper die and is provided with positioning hole, lower die is opened with lower die cavity, lower die cavity periphery is provided with positioning guide pin in lower die, lower die cavity includes front part cavity, middle part cavity and rear part cavity, front part cavity and middle part cavity are shaped block one installation area between, shaped block one installation area is provided with two shaped block one positioning pin, middle part cavity and rear part cavity are shaped block two installation groove between, two shaped block two positioning pin are provided in shaped block two installation groove, two shaped block two positioning pin between still be provided with insert placement groove.The mould structure design is reasonable, and the pull buckle product prepared can meet the surface appearance requirement, use the gap of shaped block one and shaped block two and upper and lower die as exhaust function, can effectively avoid the defect such as air pocket in preparation process.

Description

Technical Field

[0001] This invention relates to a mold, and more particularly to a mold for preparing zip-up products. Background Technology

[0002] The main purpose of the pull tab product is to connect mudguards and reduce road vibrations transmitted to them. It is suitable for medium and heavy-duty trucks, and its structure is as follows: Figures 1-2 As shown. Due to its elongated and flat structure, the mold requirements during manufacturing are relatively high, mainly considering the following two points: 1. The parting line and mold structure have certain special characteristics. In general rubber product manufacturing, the main considerations are demolding and sealing (to prevent overflow). However, this product is an appearance part, therefore, parting lines and injection slots must not appear on certain surfaces, making mold manufacturing somewhat special. 2. The three-dimensional shrinkage rates of the mold are inconsistent. In general rubber product manufacturing, the three-dimensional shrinkage rates are generally consistent, but this product, due to its elongated and flat structure, cannot be used. When making the mold, the three-dimensional shrinkage rates need to be separated to meet the shrinkage requirements after vulcanization of the rubber product and achieve the dimensional requirements of the drawings. 3. During molding, inserts belonging to the product parts need to be placed in specific positions on the mold, therefore, a structure for positioning the inserts needs to be designed. Currently, no mold is particularly suitable for manufacturing this pull-button product. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a mold for preparing zipper products. The mold has a reasonable structural design and the zipper products prepared can meet the surface appearance requirements. The gap between clamping block one and clamping block two and the upper and lower molds is used for venting, which can effectively avoid defects such as air pockets in the preparation process.

[0004] The technical solution to the above-mentioned technical problems is: a manufacturing mold for zip-up products, including an upper mold and a lower mold, and further including clamping block one and clamping block two that cooperate with the lower mold to form a product forming cavity. The upper mold has an upper mold cavity, and the upper mold outside the upper mold cavity has positioning holes that cooperate with the lower mold. The lower mold has a lower mold cavity, and the lower mold outside the lower mold cavity is provided with positioning guide pins that cooperate with the positioning holes of the upper mold. The lower mold cavity includes a front mold cavity, a middle mold cavity and a rear mold cavity. The area between the front mold cavity and the middle mold cavity is the clamping block one mounting area, and two clamping block one positioning pins are provided on the clamping block one mounting area. The area between the middle mold cavity and the rear mold cavity is the clamping block two mounting groove, and two clamping block two positioning pins are provided in the clamping block two mounting groove. An insert placement groove for placing zip-up product inserts is also provided between the two clamping block two positioning pins.

[0005] The clamping block 1 is composed of two clamping plates 1 and a cavity plate 1 connected between the two clamping plates 1. Each of the two clamping plates 1 has a clamping block 1 positioning hole that mates with the clamping block 1 positioning pin. The front end face of the clamping plate 1 is an inclined surface. The upper mold is provided with an upper mold inclined surface that mates with the front inclined surface of the plate 1. When the clamping block 1 is installed, the clamping block 1 positioning holes of the two clamping plates 1 are inserted into the clamping block 1 positioning pin. The upper end face of the cavity plate 1 is flush with the upper end face of the middle mold cavity. The front end of the clamping block 1 is located above the front mold cavity.

[0006] The clamping block 2 is composed of two clamping plates 2 and a cavity plate 2 connected between the middle of the two clamping plates 2. Both clamping plates 2 have clamping block 2 positioning holes that cooperate with the clamping block 2 positioning pins. The front end face and the rear end face of the clamping plates 2 are both inclined. When the clamping block 2 is installed, the clamping block 2 positioning holes of the two clamping plates 2 are inserted into the clamping block 2 positioning pins. The upper end face of the cavity plate 2 is flush with the upper end face of the middle mold cavity, and the upper end face of the cavity plate 2 is lower than the upper end face of the rear mold cavity.

[0007] Furthermore, the shrinkage ratio of the effective working parts of the upper and lower molds is (24-25): (4.5-5.5): 1.

[0008] The insert placement groove is provided with four protrusions for positioning the insert, and the space below the protrusions forms a material storage cavity.

[0009] There are three positioning guide pins on the lower mold: one at the front end and one on each side of the rear mold cavity. The upper mold has three positioning holes at the corresponding positions.

[0010] Both sides of the mounting area of ​​clamping block one and the mounting groove of clamping block two are provided with grooves to facilitate demolding.

[0011] By adopting the above technical solution, the present invention has the following beneficial effects:

[0012] 1. The mold structure is reasonably designed, and the resulting pull tab products have no parting lines or weld lines on the upper surface, which meets the appearance requirements of the upper surface.

[0013] 2. Due to the special shape of the zipper product, inserts need to be added during the manufacturing process. The mold design of this invention has clamping block one and clamping block two that cooperate with the lower mold. On the one hand, clamping block one and clamping block two are combined with the lower mold cavity of the lower mold to form a cavity that can form the zipper product. Clamping block two also plays the role of pressing and positioning the insert. On the other hand, the gap between clamping block one and clamping block two and the upper and lower molds is used for venting, which can effectively avoid defects such as air pockets during the manufacturing process.

[0014] 3. The upper mold and lower mold, clamping block one and lower mold, and clamping block two and lower mold use different taper fits. First, they serve as taper guides, which can achieve guidance during the vulcanization process; second, the different taper fits of the three can prevent errors.

[0015] 4. The inserts of the zipper products are initially positioned on the mold using a four-protrusion positioning mode, and then pressed into place by a pressure block to prevent the inserts from deviating or deforming during the production process, thereby ensuring the consistency of the product manufacturing process.

[0016] 5. Due to the unusual aspect ratio of 10:2:1 for the zipper product and a particularly high ratio of 30:10:1 for the effective working portion, the shrinkage rate is inconsistent. Proportionally scaling up or down the mold results in zipper products that do not meet requirements. During the research and development process, the applicant discovered that even after determining the aspect ratio of the effective working portion of the mold through standard testing, the resulting zipper products still did not meet requirements. This may be due to uneven thickness and the product's elongated shape. Determining the aspect ratio through physical testing would require significant financial investment. Therefore, determining the aspect ratio of the effective working portion of the mold is a challenge. The applicant creatively determined the aspect ratio to be (24-25):(4.5-5.5):1, with the remaining portion set for proportional shrinkage in three directions (based on the conventional hardness-shrinkage ratio). This approach allows for the production of zipper products that meet requirements with a low scrap rate.

[0017] 6. This mold uses positioning guide pins for easy and accurate positioning. The three positioning guide pins on the outer side of the lower mold primarily position the upper and lower mold structures. The two inner clamping block 1 positioning pins and the two inner clamping block 2 positioning pins are used to position clamping block 1 and clamping block 2 respectively.

[0018] 7. By adjusting the parting line, the lower mold is reserved with space for the glue block. That is, the space for the insert placement groove under the boss forms a cavity for storing glue, preventing the glue from flowing to the bottom of the insert, so as to ensure that there is no glue shortage during the preparation process.

[0019] 8. This preparation mold adopts a molding method and quantitative material feeding, which can be applied to most rubber product preparation machines.

[0020] The technical features of a manufacturing mold for a zip-up product according to the present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 One of the 3D images of the zipper product.

[0022] Figure 2 : 3D rendering of the zipper product, part two.

[0023] Figure 3 Assembly diagram of the mold for preparing the buckle product of the present invention.

[0024] Figure 4 : Front sectional view of the present invention in use.

[0025] Figure 5 Top view of the mold for making the snap fastener product of the present invention in the mold-closed state (the upper mold is omitted).

[0026] Figure 6 : Figure 7 AA sectional view.

[0027] Figure 7 Top view of the mold of this invention.

[0028] Figure 8 : A three-dimensional view of the upper mold of this invention.

[0029] Figure 9 : Main view of the lower mold of this invention.

[0030] Figure 10 : Top view of the mold of this invention.

[0031] Figure 11 : A three-dimensional view of the lower mold of this invention.

[0032] Figure 12 : Front view of the clamping block of the present invention.

[0033] Figure 13 Top view of the clamping block of the present invention.

[0034] Figure 14 Left view of the clamping block of the present invention.

[0035] Figure 15 : A perspective view of the clamping block of the present invention.

[0036] Figure 16 : Front view of the clamping block of the present invention.

[0037] Figure 17 : Top view of the clamping block of the present invention.

[0038] Figure 18 Left view of the clamping block of the present invention.

[0039] Figure 19 : Two perspective views of the clamping block of the present invention.

[0040] Figures 1-2 In the text, P represents a zip-up product, and P1 represents the insert of the zip-up product.

[0041] Figure 1 In this context, H represents the length of the effective working portion of the zipper product. Detailed Implementation

[0042] Example: A mold for manufacturing zip-up products, such asFigures 3-19 As shown, Figure 5 The left end of the middle mold is defined as the front end, and the right end is defined as the rear end. It includes an upper mold 1 and a lower mold 2, and also includes clamping block 1 3 and clamping block 2 4, which are fitted with the lower mold to form the product forming cavity. The upper mold 1 has an upper mold cavity 11, and the upper mold outside the upper mold cavity has a positioning hole 12 that is fitted with the lower mold. The lower mold has a lower mold cavity, and the lower mold outside the lower mold cavity is provided with a positioning guide pin 21 that is fitted with the positioning hole of the upper mold. The lower mold cavity includes a front mold cavity 26, a middle mold cavity 27 and a rear mold cavity 28. The area between the front mold cavity and the middle mold cavity is the clamping block 1 mounting area 23, and two clamping block 1 positioning pins 22 are provided on the clamping block 1 mounting area. The area between the middle mold cavity and the rear mold cavity is the clamping block 2 mounting groove 25, and two clamping block 2 positioning pins 24 are provided in the clamping block 2 mounting groove 25. An insert placement groove 29 for placing the buckle product insert is also provided between the two clamping block 2 positioning pins. The positioning guide pin 21, the clamping block one positioning pin 22, and the clamping block two positioning pin 24 are conical in shape and have different tapers.

[0043] The clamping block 3 is composed of two clamping plates 31 and a cavity plate 32 connected between the two clamping plates. Each clamping plate 31 has a clamping block positioning hole 33 that mates with the clamping block positioning pin 22. The rear end of the clamping plate is flush with the rear end of the cavity plate, and the front end of the clamping plate extends beyond the front end of the cavity plate. The front end face 311 of the clamping plate is a sloped surface that is longer at the bottom and shorter at the top. The upper mold has an upper mold slope 13 that mates with the front slope of the plate. When the clamping block is installed, the clamping block positioning holes 33 of the two clamping plates are inserted into the clamping block positioning pin 22. The upper end face of the cavity plate is flush with the upper end face of the middle mold cavity. The front end of the clamping block 3 is located above the front mold cavity 26, meaning the front end of the clamping block blocks the rear end of the front mold cavity 26. The upper mold slope 13 presses against the slope of the front end face 311 of the clamping plate.

[0044] The clamping block 4 is composed of two clamping plates 41 and a cavity plate 42 connected between the middle of the two clamping plates. The clamping block 4 is approximately I-shaped. Both clamping plates 41 have clamping block positioning holes 43 that cooperate with the clamping block positioning pins 24. The front end face 411 and the rear end face of the clamping plates are both inclined surfaces that are longer at the top and shorter at the bottom. That is, the cross-sectional shape of the clamping plates 41 is a trapezoid with a larger top and a smaller bottom. When the clamping block is installed, the clamping block positioning holes 43 of the two clamping plates are inserted into the clamping block positioning pins 24. The upper end face of the cavity plate is flush with the upper end face of the middle mold cavity 27 and the upper end face of the cavity plate is lower than the upper end face of the rear mold cavity 28.

[0045] In this embodiment, the clearance fit between clamping block one, clamping block two and the lower mold can be in accordance with the h7 / f6 fit standard, or the clearance between them can be controlled to be 0.02-0.04mm.

[0046] In this embodiment, the shrinkage ratio of the effective working parts of the upper and lower molds is (24-25):(4.5-5.5):1, preferably 25:5:1, while the remaining parts are set according to the three-dimensional proportional shrinkage (based on the conventional hardness-shrinkage ratio).

[0047] In this embodiment, the insert placement groove is provided with four bosses 210 for positioning the insert. The four bosses play a preliminary positioning role, and the insert is then pressed by the clamping block two, which can effectively prevent the insert from shifting. The space in the insert placement groove below the bosses forms a cavity for storing adhesive, preventing the adhesive from flowing to the bottom of the insert.

[0048] In this embodiment, there are three positioning guide pins on the lower mold: one at the front end and one on each side of the rear mold cavity. The upper mold has three positioning holes at the corresponding positions.

[0049] In this embodiment, both sides of the mounting area of ​​clamping block one and the mounting groove of clamping block two are provided with grooves 211 to facilitate demolding.

[0050] The working process of this invention:

[0051] 1. Mold opening. Open the mold and clean the inner wall cavity of the mold with clean oil; after heating the mold, use a degreasing agent to clean it and ensure that the cavity is clean; then measure the temperature of the hot mold to the required temperature.

[0052] 2. Insert Placement. Place the Z-shaped insert into the insert placement slot of the lower mold. Use the four bosses in the insert placement slot for initial positioning. Then, fit the second clamping block into the positioning pin of the second clamping block and use a rubber mallet to press the second clamping block into place. In this way, the insert is installed in place.

[0053] 3. Install clamping block one. Position clamping block one using the clamping block one positioning pin, and press clamping block one into place using a rubber mallet.

[0054] 4. Place the rubber compound. Place the standard rubber blank into the lower mold cavity and press it down slightly.

[0055] 5. Mold Closure. The upper mold is closed together with the lower mold via the three outer positioning guide pins, placed into the press, the vulcanization pressure is adjusted according to the process, the equipment is started, and the mold closure and vulcanization begins.

[0056] 6. Mold opening. After vulcanization, clean the mold cavity and repeat steps 1-5.

Claims

1. A mold for the production of a carabiner, comprising an upper mold (1) and a lower mold (2), characterized in that: It also includes the clamping block one (3) and the clamping block two (4) matched with the lower mold to form the product forming cavity, the upper mold (1) is provided with an upper mold cavity (11) in the inside, the upper mold is provided with a positioning hole (12) matched with the lower mold on the periphery of the upper mold cavity, the lower mold is provided with a lower mold cavity, the lower mold is provided with a positioning guide pin (21) matched with the positioning hole of the upper mold on the periphery of the lower mold cavity, the lower mold cavity includes a front mold cavity (26), a middle mold cavity (27) and a rear mold cavity (28), the front mold cavity and the middle mold cavity are provided with a clamping block one installation area (23) between them, the clamping block one installation area is provided with two clamping block one positioning pins (22) on it, the middle mold cavity and the rear mold cavity are provided with a clamping block two installation slot (25) between them, the clamping block two installation slot is provided with two clamping block two positioning pins (24) in it, and the two clamping block two positioning pins are further provided with an insert placement slot (29) for placing the pull buckle product insert between them, The clamping block one (3) is composed of two clamping plates one (31) and a cavity plate one (32) connected between the two clamping plates one, the two clamping plates one are both provided with a clamping block one positioning hole (33) matched with the clamping block one positioning pin (22), the front end face (311) of the clamping plate one is an inclined surface, the upper mold is provided with an upper mold inclined surface (13) matched with the front end inclined surface of the clamping plate one, when the clamping block one is installed, the clamping block one positioning holes of the two clamping plates one are inserted into the clamping block one positioning pins, the upper end face of the cavity plate one is flush with the upper end face of the middle mold cavity, and the front end of the clamping block one (3) is located above the front mold cavity (26), The clamping block two (4) is composed of two clamping plates two (41) and a cavity plate two (42) connected between the middle parts of the two clamping plates two, the two clamping plates two are both provided with a clamping block two positioning hole (43) matched with the clamping block two positioning pin (24), the front end face (411) and the rear end face of the clamping plate two are both inclined surfaces, when the clamping block two is installed, the clamping block two positioning holes of the two clamping plates two are inserted into the clamping block two positioning pins, the upper end face of the cavity plate two is flush with the upper end face of the middle mold cavity, and the upper end face of the cavity plate two is lower than the upper end face of the rear mold cavity. The length-width-height shrinkage ratio of the effective working part of the upper mold and the lower mold is (24-25):(4.5-5.5):

1. The insert placement slot is provided with four bosses (210) for positioning the position of the insert, and the space of the insert placement slot below the bosses forms a glue storage cavity.

2. A mold for making a buckle product according to claim 1, characterized in that: The positioning guide pins provided on the lower mold are three in total, one is provided at the front end of the lower mold, and one is provided on each side of the rear mold cavity, and the upper mold is provided with three positioning holes at the corresponding positions.

3. A mold for making a carabiner according to claim 1 or 2, characterized in that: The clamping block one installation area and the clamping block two installation slot are both provided with grooves (211) on both sides for easy ejection.

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