Shape correcting mold for paper-plastic product with concave arc edge

Abstract

The utility model discloses a shape righting mould for a paper-plastic product with an inner concave arc edge, which belongs to the technical field of paper-plastic product production and comprises an upper mould, a lower mould, a lower mould, a lower mould and a lower mould, the upper mould comprises an upper base plate, an upper lining plate and a trapezoidal push plate, and the upper lining plate and the trapezoidal push plate are fixedly connected to the bottom of the upper base plate; and the lower mold comprises a lower base plate, an inner mold core and an outer mold core, the inner mold core and the outer mold core are both installed on the top of the lower base plate in a sliding mode, an arc-shaped groove is formed in the outer side of the inner mold core, an inclined groove is formed in the top of the outer mold core, and the inclined groove is matched with the trapezoidal push plate. According to the utility model, through synchronous movement of the four groups of annular symmetrical mold assemblies, warping of a paper-plastic product caused by non-uniform single-side stress is eliminated, a split type sliding structure of the inner and outer mold cores is adopted, the demolding resistance is reduced, damage of the paper-plastic product caused by adhesion is avoided, and stable pressure transmission in a mold closing stage is ensured through a slope self-locking effect of a trapezoidal push plate and a chute.

Description

Technical Field

[0001] This utility model relates to the field of paper-plastic product manufacturing technology, and in particular to a shaping mold for paper-plastic products with an inner concave arc edge. Background Technology

[0002] With the implementation of environmental protection policies, paper-plastic products (such as tableware and packaging liners) are gradually replacing plastic products, leading to a surge in market demand. However, in the pulp molding process, after demolding, products are prone to defects such as edge warping and dimensional deviations due to moisture evaporation and fiber shrinkage, requiring secondary shaping using orthotic molds. Traditional orthotic techniques have the following drawbacks:

[0003] 1) Structural limitations:

[0004] Traditional molds often use an integral cavity structure, which cannot accurately adapt to the complex curved surface of the concave arc edge. This results in a dimensional fluctuation of ≥1 mm in the arc edge of the product after straightening, with a yield rate of less than 80%. When demolding with an integral mold, the large vacuum suction force can easily cause paper-plastic products to tear (scrap rate >10%), especially affecting thin-walled (<1.5 mm) products.

[0005] 2) Motion control defects:

[0006] Existing split molds rely on spring reset. After long-term use, spring fatigue causes asynchronous movement of the inner and outer mold cores, with cumulative errors reaching 0.5-1 mm. Frequent manual calibration is required. The mold components lack rigid guiding mechanisms, making them prone to skewing during mold closing and affecting the symmetry of the arc edge forming.

[0007] 3) Insufficient maintenance and adaptability:

[0008] When the mold wears out, it needs to be replaced as a whole, which is costly and causes long downtime (≥4 hours). A single mold can only be used for products with a fixed curvature. When switching models, the mold needs to be redesigned and processed, which takes 2-3 weeks. Therefore, we propose a shaping mold for paper-plastic products with concave curved edges to solve this problem. Utility Model Content

[0009] The purpose of this invention is to provide a shaping mold for paper-plastic products with a concave arc edge, so as to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A shaping mold for paper-plastic products with a concave arc edge, comprising:

[0012] The upper mold includes an upper base plate, an upper liner plate, and a trapezoidal push plate, with the upper liner plate and the trapezoidal push plate fixedly connected to the bottom of the upper base plate.

[0013] The lower mold includes a lower base plate, an inner mold core, and an outer mold core. The inner mold core and the outer mold core are slidably mounted on the top of the lower base plate. An arc-shaped groove is provided on the outer side of the inner mold core, and an inclined groove is provided on the top of the outer mold core. The inclined groove is adapted to the trapezoidal push plate.

[0014] The trapezoidal push plate, inner mold core, and outer mold core are all provided in four sets, arranged in a ring with equal spacing.

[0015] Preferably, the top of the lower substrate has four square holes, and a connecting arm is slidably connected in the square holes. The top of the connecting arm is integrally formed with an inclined protrusion, and the top of the inner mold core has an inclined groove, and the inclined protrusion is slidably connected in the inclined groove.

[0016] Preferably, a slide rail is fixedly connected to the top of the lower substrate, and a guide hole is provided on the top of the inner mold core, with the slide rail slidably connected within the guide hole.

[0017] Preferably, a baffle is fixedly connected to the top of the lower substrate, and the baffle is disposed on the outside of the corresponding outer mold core.

[0018] Preferably, a guide rail is fixedly connected to the top of the lower substrate, and the outer mold core is slidably sleeved on the outside of the guide rail.

[0019] Preferably, the two outer mold cores located on the left and right sides of the four outer mold cores are integrally formed with square protrusions at both ends, and the two outer mold cores located on the front and rear sides are provided with square insertion grooves that are adapted to the square protrusions at both ends.

[0020] Preferably, a base plate is fixedly connected to the bottom of the lower substrate.

[0021] In this utility model, a shaping mold for paper-plastic products with concave arc edges is described. By moving the upper mold downward, during which the trapezoidal push plate contacts the inclined groove on the top of the outer mold core, the four sets of outer mold cores are pushed to slide inward synchronously along the guide rail. The arc groove on the outer wall of the inner mold core and the inner wall of the outer mold core together form a closed concave arc edge cavity, thereby completing the shaping and fixing of the side wall of the paper-plastic product.

[0022] In this utility model, a shaping mold for paper-plastic products with concave arc edges is described. When the upper mold rises, the trapezoidal push plate disengages from the inclined groove of the outer mold core, thereby releasing the fixation on the outer mold core and facilitating the removal of the formed paper-plastic product.

[0023] This utility model has a reasonable structural design. By moving synchronously through four sets of annular symmetrical mold components, it eliminates the warping of paper-plastic products caused by uneven force on one side. The split sliding structure of the inner and outer mold cores reduces demolding resistance and avoids damage to paper-plastic products caused by adhesion. The self-locking effect of the trapezoidal push plate and the inclined groove ensures stable pressure transmission during the mold closing stage. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a shaping mold for paper-plastic products with a concave arc edge, as proposed in this utility model.

[0025] Figure 2 This is a cross-sectional structural diagram of a shaping mold for paper-plastic products with a concave arc edge, as proposed in this utility model.

[0026] Figure 3 This is an exploded three-dimensional structural diagram of a shaping mold for paper-plastic products with a concave arc edge, as proposed in this utility model.

[0027] Figure 4 This is a partial three-dimensional structural diagram of a shaping mold for paper-plastic products with a concave arc edge proposed in this utility model;

[0028] Figure 5 This is a three-dimensional structural diagram of the inner mold core, connecting arm, and guide rail proposed in this utility model;

[0029] Figure 6 This is a three-dimensional structural diagram of the outer mold core proposed in this utility model;

[0030] Figure 7 This is a three-dimensional structural diagram of the upper mold proposed in this utility model;

[0031] Figure 8 This is a three-dimensional structural diagram of the lower mold proposed in this utility model.

[0032] In the diagram: 1. Upper base plate; 2. Base plate; 3. Lower base plate; 4. Upper liner plate; 5. Inner mold core; 501. Arc-shaped groove; 502. Guide hole; 6. Outer mold core; 601. Inclined groove; 602. Square protrusion; 603. Square insertion slot; 7. Trapezoidal push plate; 8. Baffle; 9. Guide rail; 10. Connecting arm; 11. Slide rail. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0034] Reference Figure 1-8 A shaping mold for paper-plastic products with a concave arc edge, comprising:

[0035] The upper mold includes an upper base plate 1, an upper liner plate 4, and a trapezoidal push plate 7, with the upper liner plate 4 and the trapezoidal push plate 7 fixedly connected to the bottom of the upper base plate 1.

[0036] The lower mold includes a lower base plate 3, an inner mold core 5 and an outer mold core 6. The inner mold core 5 and the outer mold core 6 are slidably mounted on the top of the lower base plate 3. An arc-shaped groove 501 is provided on the outer side of the inner mold core 5, and an inclined groove 601 is provided on the top of the outer mold core 6. The inclined groove 601 is adapted to the trapezoidal push plate 7.

[0037] The trapezoidal push plate 7, the inner mold core 5, and the outer mold core 6 are all provided with four sets, arranged in a ring with equal spacing.

[0038] In this embodiment, the top of the lower substrate 3 has four square holes, and a connecting arm 10 is slidably connected in the square holes. The top of the connecting arm 10 is integrally formed with an inclined protrusion. The top of the inner mold core 5 has an inclined groove 601, and the inclined protrusion is slidably connected in the inclined groove 601. The top of the lower substrate 3 is fixedly connected with a slide rail 11, and the top of the inner mold core 5 has a guide hole 502. The slide rail 11 is slidably connected in the guide hole 502, thereby guiding the inner mold core 5.

[0039] In this embodiment, a baffle 8 is fixedly connected to the top of the lower substrate 3. The baffle 8 is disposed on the outside of the corresponding outer mold core 6 to restrict the movement of the outer mold core 6 and prevent the outer mold core 6 from falling off. A guide rail 9 is fixedly connected to the top of the lower substrate 3. The outer mold core 6 is slidably sleeved on the outside of the guide rail 9 to guide the outer mold core 6.

[0040] In this embodiment, two of the four outer mold cores 6 located on the left and right sides have square protrusions 602 integrally formed at both ends, and two of the outer mold cores 6 located on the front and rear sides have square insertion slots 603 adapted to the square protrusions 602 at both ends, thereby realizing the positioning between adjacent outer mold cores 6.

[0041] In this embodiment, the bottom of the lower substrate 3 is fixedly connected to the bottom plate 2 to facilitate support and fixation.

[0042] In this embodiment, during use, the upper mold moves downward, during which the trapezoidal push plate 7 contacts the inclined groove 601 on the top of the outer mold core 6, pushing the four sets of outer mold cores 6 to slide inward synchronously along the guide rail 9. The arc-shaped groove 501 on the outer wall of the inner mold core 5 and the inner wall of the outer mold core 6 together form a closed concave arc-shaped cavity, completing the shaping and fixing of the side wall of the paper-plastic product. When the upper mold rises, the trapezoidal push plate 7 disengages from the inclined groove 601 of the outer mold core 6, thereby releasing the fixation of the outer mold core 6, so as to facilitate the removal of the formed paper-plastic product.

[0043] The foregoing description provides a detailed introduction to a shaping mold with a concave arc edge for paper-plastic products according to this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A straightening mold for a paper plastic product having an inner concave curved edge, characterized by, Include: Upper mold, the upper mold includes upper base plate (1), upper lining plate (4) and trapezoidal push plate (7), upper lining plate (4) and trapezoidal push plate (7) are fixedly connected to the bottom of upper base plate (1) ; Lower mold, the lower mold includes lower base plate (3), inner mold core (5) and outer mold core (6), the inner mold core (5) and outer mold core (6) are both slidingly installed on the top of lower base plate (3), the outer side of inner mold core (5) is provided with arc-shaped groove (501), the top of outer mold core (6) is provided with inclined chute (601), and the inclined chute (601) is matched with trapezoidal push plate (7) ; The trapezoidal push plate (7), the inner mold core (5) and the outer mold core (6) are all provided with four groups and are arranged at equal intervals in a ring shape.

2. The orthopaedic mold for paper plastic products with an inner concave curved edge according to claim 1, characterized in that, The top of the lower base plate (3) is provided with four square holes, the square holes are slidingly connected with connecting arms (10), the top of the connecting arm (10) is integrally formed with an inclined protrusion, the top of the inner mold core (5) is provided with an inclined chute (601), and the inclined protrusion is slidingly connected in the inclined chute (601).

3. The orthopaedic mold for paper plastic products with recessed curved edges according to claim 1, characterized in that, The top of the lower base plate (3) is fixedly connected with a sliding rail (11), the top of the inner mold core (5) is provided with a guide hole (502), and the sliding rail (11) is slidingly connected in the guide hole (502).

4. The orthotic mold for paper plastic products with an inner concave curved edge according to claim 1, characterized by, The top of the lower base plate (3) is fixedly connected with a baffle (8), and the baffle (8) is arranged on the outer side of the corresponding outer mold core (6).

5. The orthotic mold for paper plastic products with recessed curved edges according to claim 1, characterized in that, The top of the lower base plate (3) is fixedly connected with a guide rail (9), and the outer mold core (6) is slidingly sleeved on the outer side of the guide rail (9).

6. The orthotic mold for paper plastic products with recessed curved edges according to claim 1, characterized in that, The two ends of the two outer mold cores (6) located on the left and right sides of the four outer mold cores (6) are integrally formed with square protrusions (602), and the two ends of the two outer mold cores (6) located on the front and rear sides are provided with square insertion grooves (603) matched with the square protrusions (602).

7. The orthotic mold for paper plastic products with recessed curved edges according to claim 1, characterized in that, The bottom of the lower base plate (3) is fixedly connected with a bottom plate (2).

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