Mould for one-time molding modeling of box body and box body processing method
By designing adjustable molds and in-mold punches, and combining them with hot melt adhesive technology, the problem of uneven stress on sheet materials during the molding process of logistics boxes was solved, achieving efficient and low-cost box forming.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-20
- Publication Date
- 2026-04-17
AI Technical Summary
In existing technologies, the molding process for logistics boxes is difficult to effectively solve the problem of the box forming being affected by the stress on different parts of the sheet material, resulting in high costs and low efficiency.
A mold comprising a first mold and a second mold is designed. The second mold has an adjustable cavity and a rotatable side template. Through the cooperation of the in-mold punch and the dividing template, the sheet material is precisely formed and composited. Hot melt adhesive is used to composite the sheet material with the protective component.
This achieved efficient molding of the box body, reduced labor costs, improved production efficiency, reduced sheet material waste, and lowered overall costs.
Smart Images
Figure CN121870994A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of molds, specifically relating to a mold and a method for processing composite material boxes. Background Technology
[0002] With the development of the logistics industry, the demand for logistics boxes is increasing. One-piece molding can significantly reduce the cost of logistics boxes, making molded logistics boxes the future direction. During molding, the stress on different parts of the sheet material will affect the forming of the box. Therefore, it is necessary to develop a mold that facilitates box forming. Summary of the Invention
[0003] The present invention provides a mold for one-time molding of a box body. The mold includes a first mold and a second mold. The first mold includes a mold body, an in-mold punch and a dividing template. The cavity of the second mold is adjustable.
[0004] The second mold includes a mold base, a bottom template, a rotatable side template, and a second mold adjusting component. The bottom template and the rotatable side template are installed in the mold cavity of the mold base, forming a mold cavity. The bottom of the rotatable side template is fixed, and the second mold adjusting component can push the rotatable side template to rotate inward.
[0005] The rotatable side template has an outer inclined surface. The second mold adjustment component includes an adjustment frame and a push plate. The push plate has an inner inclined surface, which contacts the outer inclined surface of the rotatable side template. By pressing the second mold adjustment component down through the first mold, the inner inclined surface of the push plate pushes the outer inclined surface of the rotatable side template, thereby pushing the rotatable side template to rotate inward.
[0006] The adjustment frame is equipped with a telescopic rod on its lower side. The bottom end of the telescopic rod abuts against the bottom of the mold cavity. The adjustment frame and the push plate are either integrated or separate components.
[0007] The rotatable side template has a bottom mounting part, which is a rotating shaft or a mounting ring. The mold base has a side template mounting part, which is a hole that accommodates the rotating shaft or a mounting ring that mates with the mounting ring. The rotating shaft is installed in the corresponding hole, or the mounting ring and the mating mounting ring are connected by a locking pin.
[0008] The mold body includes a template and a mold core, with a mold hole on the template; the in-mold punch includes a hollow punch holder, a punch, a push rod and an elastic element, the punch is installed inside the frame of the punch holder, the push rod is set on the upper surface of the punch holder for insertion into the mold hole, the elastic element is installed on the lower surface of the punch holder, the sub-template has a receiving part for receiving the punch holder and the elastic element, and the mold body is connected and fixed to the sub-template.
[0009] The second mold is also equipped with an in-mold punch and / or a dividing plate; and / or the first mold is also equipped with a mold adjusting component.
[0010] The present invention also discloses a method for assembling the above-mentioned mold, characterized by comprising the following steps: Assemble the first mold: 1) Install the in-mold punch by inserting the push rod of the in-mold punch into the mold hole of the template; 2) Install the template so that the punch holder and elastic element are accommodated in the receiving part of the template; 3) Connect and fix the mold body to the template; Assemble the second mold: 1) Install the bottom template. Place the bottom template into the mold cavity and fix it in place by the bottom template mounting part. 2) Install the rotatable side templates. Place multiple rotatable side templates into the mold cavity and install their bottom mounting parts onto the side template mounting parts. 3) Install the telescopic component. Install the telescopic component onto the second mold adjustment component and adjust the length of the telescopic component. 4) Install the second mold adjustment component and insert the telescopic component between two adjacent rotatable side templates so that the lower end of the telescopic component contacts the bottom surface of the mold cavity, and at the same time, the outer inclined surface of the rotatable side template contacts the inner inclined surface of the push plate of the second mold adjustment component.
[0011] Furthermore, the present invention also discloses a method for processing a box body using the above-described mold or a mold assembled using the above-described assembly method, comprising the following steps: Step 1: Install the first mold and adjust the gap between the punch holder and the dividing plate according to the sheet thickness; Step 2: Install the second mold and adjust the tilt of the rotatable side template; Step 3: Place the sheet; Step 4: Initiate the first mold's movement towards the second mold; Step 5: The core of the first mold contacts the sheet, and the first mold continues to move towards the second mold; Step 6: The mold core pushes the sheet material towards the mold cavity to stretch, extend, and fold to deform it until the first mold's dividing plate and the second mold's second mold adjusting piece contact each other through the sheet material; Step 7: The template drives the second mold adjustment component to move, and the second mold adjustment component pushes the rotatable side template of the second mold to rotate inward, and the rotatable side template extrudes and shapes the sheet; Step 8: Continue the operation of the template until it contacts the upper surface of the mold side of the mold base through the sheet material. The rotatable side template is rotated to the set position, and the first mold and the second mold are closed to form a closed mold cavity, which extrudes and shapes the sheet material inside the mold cavity. Step 9: Cooling and setting; Step 10: After the shaping is completed, start the in-mold punch to separate the scrap and the product; Step 11: Open the mold and remove the product and scraps.
[0012] Furthermore, during processing, a protective component with a certain hardness and roughly the same shape as the mold cavity is placed in advance inside the mold cavity. Hot melt adhesive is applied to the surface of the protective component that does not contact the mold cavity. In step 8, when the sheet is extruded and shaped inside the mold cavity, the heat of the sheet is used to melt the hot melt adhesive on the surface of the protective component. In step 9, in-mold bonding is completed to manufacture a composite box in which the protective component and the sheet are bonded together.
[0013] The present invention also discloses a box body prepared by the above method, wherein the sheet material for preparing the box body is a single material or a composite material.
[0014] The mold and processing method provided by this invention are beneficial for box forming, can save labor costs, improve production efficiency, reduce sheet material loss, and reduce costs. Attached Figure Description
[0015] Figure 1 : Schematic diagram of upper and lower mold assembly; Figure 2 : Schematic diagram of the upper mold exploded; Figure 3 : Schematic diagram of the lower mold exploded; Figure 4 : Sheet placement diagram; Figure 5 : Schematic diagram of the upper mold operation; Figure 6 : Schematic diagram of the upper mold in position. Explanation of reference numerals in the attached figures 100 - First Mock Exam; 101-Phantom 1011-Mold template; 1012-Mold core; 1013-Mold hole; 102 - In-mold punch; 1021-Punch holder; 1022-Punch; 1023-Push rod; 1024-Elastic element; 103-section template; 1031-Hollow bottom plate; 1032-Side plate; 1033-Accommodation part; 200 - Second Module; 201-Mold base; 2011 - Mold bottom; 2012 - Mold side; 2013 - Mold cavity; 2014 - Bottom formwork installation section; 2015 - Side formwork installation section; 202-Bottom Template; 203 - Rotatable side template; 2031 - Outer slope; 2032 - Bottom mounting section; 204 - Second mold adjustment component; 2041 - Adjustment frame; 2042 - Push plate; 2043 - Inner inclined surface of push plate; 205 - Telescopic component; 300-Sheet. Implementation
[0017] The present invention will now be described in detail with reference to the accompanying drawings.
[0018] The mold includes a first mold 100 and a second mold 200. The first mold 100 includes a mold body 101, an in-mold punch 102, and a dividing plate 103. The second mold 200 includes a mold base 201, a bottom plate 202, a rotatable side plate 203, a second mold adjusting component 204, and a telescopic component 205. Figure 1 In the illustrated embodiment, the first mold 100 is the upper mold, and the second mold 200 is the lower mold.
[0019] like Figure 1 , 2 As shown, the mold body 101 includes a template 1011 and a mold core 1012. The template 1011 and the mold core 1012 can be integrated or separate. Separate structures can be connected by bolts. The template 1011 has a mold hole 1013 for inserting the push rod of the in-mold punch. The template 1011 also has mounting holes for connecting and fixing with the sub-template 103.
[0020] The in-mold punch 102 includes a punch holder 1021, a punch 1022, a push rod 1023, and an elastic element 1024. The punch holder 102 is a hollow frame. The punch 1022 is installed inside the frame. The push rod 1023 is located on the upper surface of the punch holder 1021. The push rod 1023 and the punch holder 1021 can be integrated or assembled separately. The elastic element 1024 is installed on the lower surface of the punch holder 1021.
[0021] The template 103 includes a hollow base plate 1031 and side plates 1032. The hollow base plate 1031 and side plates 1032 form a receiving portion 1033 for accommodating the punch holder 1021 and the elastic element 1024. The depth of the receiving portion 1033 of the template 103 is greater than the thickness of the punch holder 1021, and the difference is the stroke distance of the punch 1022. The hollow base plate 1031 and side plates 1032 can be integrally formed or assembled separately. Mounting holes are provided on the side plates for fixing to the mold body 101.
[0022] The assembly process for the first mold 100 is as follows: 1. Install the in-mold punch. Insert the push rod 1023 of the in-mold punch 102 into the mold hole 1013 of the template 1011, so that the inner side of the punch 1022 is close to the side of the mold core.
[0023] 2. Install the template 103 so that the inner side of the hollow base plate 1031 of the template 103 is close to the outer side of the punch, and accommodate the punch holder 1021 and the elastic element 1024 in the receiving part of the template 103. The elastic element 1024 installed on the lower surface of the punch holder 1021 abuts against the upper surface of the hollow base plate 1031 to support the punch holder 1021.
[0024] 3. Connect and fix the mold body 101 and the sub-mold 103 by inserting bolts into the mounting holes of the mold 1011 and the sub-mold 103. Of course, other means of fixing can also be used, as long as they can be fixed together.
[0025] if Figure 1 , 3 As shown, the second mold 200 includes a mold base 201, a bottom template 202, a rotatable side template 203, a second mold adjustment component 204, and a telescopic component 205.
[0026] The mold base 201 includes a mold bottom 2011 and a mold side 2012, which together form a mold receiving cavity 2013. The mold receiving cavity 2013 is provided with a bottom template mounting part 2014 and a side template mounting part 2015 for placing the bottom template 202 and the rotatable side template 203.
[0027] The bottom mounting portion 2032 of the rotatable side template 203 can rotate inward and outward after being installed onto the side template mounting portion 2015. The bottom template 202 and the rotatable side template 203, placed within the mold cavity 2013, form the mold cavity. The bottom mounting portion 2032 of the rotatable side template 203 can be a rotating shaft or a mounting ring. Correspondingly, the side template mounting portion 2015 of the mold base can be a hole for accommodating the rotating shaft or a mating mounting ring. The rotating shaft can be installed in the corresponding hole, or the mounting ring and the mating mounting ring can be connected in series with locking pins to form a connection, as long as the rotatable side template 203 can be rotatably fixed.
[0028] The second mold adjustment component 204 includes an adjustment bracket 2041 and a push plate 2042. Figure 1 In the illustrated embodiment, the adjusting frame 2041 and the push plate 2042 are integrally formed. The adjusting frame 2041 and the push plate 2042 can also be independent components. A mounting groove is provided in the adjusting frame, and the push plate 2042 is installed in the mounting groove; alternatively, the push plate 2042 is installed into the adjusting frame using screws. Other installation methods can also be used, as long as the push plate 2042 is fixed to the adjusting frame 2041.
[0029] The telescopic component 205 is installed on the lower surface of the adjusting frame 2041. The telescopic component 205 includes a guide rod and a spring sleeved on the guide rod.
[0030] The assembly process for the second module 200 is as follows: 1. Install the bottom template 202. Place the bottom template 202 into the mold cavity 2013 and fix it in place by the bottom template mounting part 2014.
[0031] 2. Install the rotatable side template 203. Place multiple rotatable side templates 203 into the mold cavity 2013, and install their bottom mounting parts 2032 into the side template mounting parts 2015. Because there is space between the rotatable side template and the inner wall of the mold cavity, the rotatable side template 203 can rotate and tilt outward.
[0032] 3. Install the telescopic component 205. Place the telescopic component 205 onto the second mold adjusting component 204 and adjust its length. Figure 1 , 2 As shown, the telescopic component 205 is installed at the corner of the second mold adjustment component 204.
[0033] 4. Install the second mold adjusting component 204, and insert the telescopic component 205 between two adjacent rotatable side templates 203, so that the lower end of the telescopic component 205 contacts the bottom surface of the mold cavity, and at the same time, the outer inclined surface 2031 of the rotatable side template 203 contacts the inner inclined surface 2043 of the push plate of the second mold adjusting component. Figure 1 As shown, since the total height of the adjusting frame 2041 and the telescopic member 205 is greater than the depth of the mold cavity 2013, the adjusting frame 2041 is higher than the upper surface of the mold cavity 2013.
[0034] The following is based on Figure 1 The illustrated embodiment describes the process of molding a box using the mold of the present invention.
[0035] Step 1: Install the first mold 100, and adjust the gap between the punch holder 1021 and the dividing template 103 according to the thickness of the sheet 300; Step 2: Install the second mold 200 and adjust the tilt of the rotatable side template 203; Step 3: Place sheet 300 on the second mold 200; Step 4: Initiate the first module 100 downward movement; Step 5: The mold core 1012 contacts the sheet 300, such as... Figure 4 As shown, the first module 100 continues to move downwards; Step 6: The mold core 1012 pushes the sheet 300 downward to stretch, extend and fold to deform it until the dividing mold 103 and the second mold adjustment component 204 come into contact with the sheet 300 through it; Step 7: The dividing template 103 drives the second mold adjusting component 204 to move downward, the second mold adjusting component 204 pushes the rotatable side template 203 to rotate inward, and the rotatable side template 203 extrudes and shapes the sheet 300; Step 8: The template 103 continues downward until it contacts the upper surface of the mold side 2012 through the sheet 300. At this time, the rotatable side template 203 is rotated to the set position, the first mold 100 and the second mold 200 are closed to form a closed mold cavity, and the sheet 300 in the mold cavity is extruded and shaped. Step 9: Cooling and shaping. During this process, a vacuum negative pressure can be set to start to assist in the shaping process. Step 10: After the shaping is completed, start the in-mold punch 102 to move downwards to separate the scrap and the product; Step 11: Open the mold, remove the product and scraps, and prepare for the next operation.
[0036] In the embodiments described above, the sheet 300 can be a single EPE foam material or a composite of EPE foam material and a protective layer, wherein the protective layer is preferably EPE material, so that the scraps do not need to be separated from the two materials and can be processed together.
[0037] Another embodiment is described below. A protective component with a certain rigidity and identical shape to the second mold 200 is prepared in advance. Hot melt adhesive is applied to the surface of the protective component that contacts the sheet 300. The protective component is placed in the mold cavity formed by the bottom mold 202 and the rotatable side mold 203. In step 8 above, when the sheet 300 is extruded and shaped in the mold cavity, the heat of the sheet 300 melts the hot melt adhesive on the surface of the protective component. During the cooling and shaping process, in-mold bonding is completed, producing a composite box in which the protective component and the sheet are bonded together.
[0038] This application does not limit the specific composition and installation of the first mold and the second mold. For example, the first mold can be used as the lower mold and the second mold as the upper mold. In-mold punches and / or dividing plates can be installed on both the first mold and the second mold. Mold adjusting components can be installed on either the first mold or the second mold, or mold adjusting components can be installed on both the first mold and the second mold. The structure of the first mold and the second mold can be adjusted accordingly to meet the processing requirements.
[0039] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the application and the description of the present invention should still fall within the scope of the present invention.
Claims
1. A mold for one-shot molding of a box, comprising a first mold (100) and a second mold (200), the first mold (100) comprising a mold body (101), a mold inner punch (102) and a parting plate (103); characterized in that: The cavity of the second mold (200) is adjustable.
2. The mold according to claim 1, characterized in that: The second mold (200) includes a mold base (201), a bottom template (202), a rotatable side template (203), and a second mold adjusting component (204). The bottom template (202) and the rotatable side template (203) are installed in the mold cavity (2013) of the mold base (201). The bottom template (202) and the rotatable side template (203) form a mold cavity. The bottom of the rotatable side template (203) is fixed. The second mold adjusting component (204) can push the rotatable side template (203) to rotate inward.
3. The mold according to claim 2, characterized in that: The rotatable side template (203) has an outer inclined surface (2031). The second mold adjustment component (204) includes an adjustment frame (2041) and a push plate (2042). The push plate (2042) has an inner inclined surface (2043). The inner inclined surface (2043) of the push plate contacts the outer inclined surface (2031) of the rotatable side template (203). The first mold (100) presses the second mold adjustment component (204) down, which drives the inner inclined surface (2043) of the push plate to push the outer inclined surface (2031) of the rotatable side template (203), thereby pushing the rotatable side template (203) to rotate inward.
4. The mold according to claim 3, characterized in that: A telescopic rod is installed on the lower side of the adjusting frame (2041), and the bottom end of the telescopic rod abuts against the bottom of the mold cavity (2013). The adjusting frame (2041) and the push plate (2042) are either integrally formed or separate parts.
5. The mold according to any one of claims 3-4, wherein the rotatable side template (203) has a bottom mounting portion (2032), the bottom mounting portion 2032 being a rotating shaft or a mounting ring, and the mold base (201) has a side template mounting portion (2015), the side template mounting portion (2015) being a hole for receiving the rotating shaft or a mounting ring mating with the mounting ring, wherein the rotating shaft is installed in the corresponding hole, or the mounting ring and the mating mounting ring are connected in series with a locking pin.
6. The mold according to claim 5, characterized in that: The mold body (101) includes a template (1011) and a mold core (1012). The template (1011) has a mold hole (1013). The in-mold punch (102) includes a hollow punch holder (1021), a punch (1022), a push rod (1023), and an elastic element (1024). The punch (1022) is installed inside the frame of the punch holder (1021). The push rod (1023) is set on the upper surface of the punch holder (1021) for insertion into the mold hole (1013). The elastic element (1024) is installed on the lower surface of the punch holder (1021). The sub-template (103) has a receiving part (1033) for receiving the punch holder (1021) and the elastic element (1024). The mold body (101) is connected and fixed to the sub-template (103).
7. The mold according to any one of claims 2-6, characterized in that: An in-mold punch and / or a dividing plate are also installed on the second mold (200); and / or, a mold adjustment component is also installed on the first mold (100).
8. The assembly method of the mold according to claims 2-7, characterized in that, Includes the following steps: Assemble the first module (100): 1) Install the in-mold punch (102) and insert the push rod (1023) of the in-mold punch (102) into the mold hole (1013) of the template (1011); 2) Install the template (103) so that the punch holder (1021) and the elastic element (1024) are accommodated in the receiving part of the template (103); 3) Connect and fix the mold body (101) to the template (103); Assemble the second module (200): 1) Install the bottom template (202), place the bottom template (202) into the mold cavity (2013), and fix it by the bottom template installation part (2014); 2) Install the rotatable side template 203, place multiple rotatable side templates (203) into the mold cavity (2013), and install its bottom mounting part (2032) onto the side template mounting part (2015). 3) Install the telescopic component (205), install the telescopic component (205) onto the second mold adjusting component (204), and adjust the length of the telescopic component; 4) Install the second mold adjustment component (204), insert the telescopic component (205) between two adjacent rotatable side templates (203), so that the lower end of the telescopic component 205 contacts the bottom surface of the mold cavity, and at the same time, the outer inclined surface (2031) of the rotatable side template (203) contacts the inner inclined surface (2043) of the push plate of the second mold adjustment component.
9. A method for processing a box body using the mold described in any one of claims 2-7 or the mold assembled using the assembly method of claim 8, characterized in that, Includes the following steps: Step 1: Install the first mold (100), and adjust the gap between the punch holder (1021) and the dividing template (103) according to the thickness of the sheet (300); Step 2: Install the second mold (200) and adjust the inclination of the rotatable side template (203); Step 3: Place the sheet; Step 4: Initiate the movement of the first mold (100) toward the second mold (200); Step 5: The core (1012) of the first mold contacts the sheet (300), and the first mold (100) continues to move toward the second mold (200); Step 6: The mold core (1012) pushes the sheet (300) towards the mold cavity to stretch, extend and fold to deform until the first mold's dividing plate (103) and the second mold's second mold adjustment piece (204) come into contact with each other through the sheet (300); Step 7: The template (103) drives the second mold adjustment component (204) to move. The second mold adjustment component (204) pushes the rotatable side template (203) of the second mold to rotate inward. The rotatable side template (203) extrudes and shapes the sheet (300). Step 8: The template (103) continues to operate until it contacts the upper surface of the mold side (2012) of the mold base through the sheet (300). The rotatable side template 203 rotates to the set position, and the first mold (100) and the second mold (200) close to form a closed mold cavity, and the sheet (300) in the mold cavity is squeezed and shaped. Step 9: Cooling and setting; Step 10: After the shaping is completed, start the in-mold punch (102) to separate the scrap and the product; Step 11: Open the mold and remove the product and scraps.
10. The method according to claim 9, characterized in that: A protective component with a certain hardness and roughly the same shape as the mold cavity is placed in advance in the mold cavity. Hot melt adhesive is applied to the surface of the protective component that does not contact the mold cavity. In step 8, when the sheet (300) is extruded and shaped in the mold cavity, the heat of the sheet (300) is used to melt the hot melt adhesive on the surface of the protective component. In step 9, in-mold composite is completed to produce a composite box in which the protective component and the sheet are combined.
11. A box prepared by the method of claim 9 or 10, wherein the sheet (300) for preparing the box is a single material or a composite material.