Thermal forming die and feeding piece thereof

Abstract

The utility model discloses a thermal forming die and a feeding piece thereof. The feeding piece comprises a feeding channel communicated with a thermal forming cavity of the thermal forming die and a cooling part used for cooling the feeding channel. According to the thermal forming die and the feeding piece thereof, the materials in the feeding channel of the feeding piece can be recycled, and the materials can be saved.

Description

Technical Field

[0001] The present disclosure relates to the field of thermoforming, and in particular to a thermoforming mold and a feed piece thereof. Background Art

[0002] Currently, thermoforming molds typically consist of a first module and a second module. These modules work together to form a thermoforming cavity that heats and shapes the material into a product, thereby changing the material's shape and enhancing its mechanical properties. For example, a viscous or semi-fluid rubber material can be heat-formed into a predetermined shape and enhance its toughness.

[0003] However, when the mold is heated to thermoform the material in the thermoforming cavity of the mold, the material in all flow channels on the mold connected to the thermoforming cavity will also be heated and formed, which not only wastes material, but also makes it difficult to break the material when the mold is opened, making the mold opening difficult. Summary of the Invention

[0004] One advantage of the present disclosure is that it provides a thermoforming mold and a feed piece thereof, wherein the material in the feed channel can be reused, which is beneficial to saving materials.

[0005] To achieve at least one of the above advantages of the present disclosure, the present disclosure provides a feed piece for a thermoforming mold, comprising: a feed channel connected to a thermoforming cavity of the thermoforming mold, and a cooling portion for cooling the feed channel.

[0006] According to an embodiment of the present disclosure, the cooling portion includes a cooling channel formed in the feeding member for circulating a coolant.

[0007] According to an embodiment of the present disclosure, the feed member forms a coolant inlet and a coolant outlet communicating with the cooling channel, and is configured to communicate with a coolant input pipe and a coolant output pipe, respectively.

[0008] According to one embodiment of the present disclosure, the cooling channel includes: at least one first sub-channel and a second sub-channel, extending in the same direction as the feed channel and arranged on the outer peripheral side of the feed channel; and at least one third sub-channel, extending along the outer peripheral side of the feed channel and connected to the first sub-channel and the second sub-channel respectively.

[0009] The present disclosure also provides a thermoforming mold, including: a first mold assembly; a second mold assembly, which cooperates with the first mold assembly to form a thermoforming cavity capable of thermoforming the product; and a feed piece as described above, wherein the feed channel of the feed piece is connected to the thermoforming cavity.

[0010] According to an embodiment of the present disclosure, the feed piece is provided on one of the first mold assembly and the second mold assembly.

[0011] According to one embodiment of the present disclosure, the second mold assembly includes: a second sub-mold, which cooperates with the first mold assembly to form the thermoforming cavity, and forms a receiving hole extending along the mold opening and closing direction and open toward the first mold assembly; and at least one elastic telescopic member, which is arranged in the receiving hole; and shrinks to the receiving hole when the second sub-mold is combined with the first mold assembly; and extends out of the receiving hole and stops at the first mold assembly when the second sub-mold is away from the first mold assembly.

[0012] According to an embodiment of the present disclosure, there are multiple elastic and telescopic parts, and the multiple elastic and telescopic parts are arranged at intervals in the circumferential direction around the second sub-mold.

[0013] According to an embodiment of the present disclosure, one end of the accommodating hole close to the first mold assembly extends radially inward to form an anti-slip portion;

[0014] The elastic telescopic part includes: a stop part, including a shaft part that can enter and exit the accommodating hole and a shoulder part located in the accommodating hole, extending radially along the shaft part and able to resist the anti-slip part, and an elastic part, arranged between the end wall of the other end of the accommodating hole and the shoulder part.

[0015] According to one embodiment of the present disclosure, the first mold assembly includes: a first template, which is arranged opposite to the second mold assembly; and a first mold core, which is detachably provided on the first template and is located between the first template and the second mold assembly, and the first mold core, the first template and the second mold assembly cooperate to form the thermoforming cavity.

[0016] Beneficial effects:

[0017] (1) The thermoforming mold and feed member disclosed herein can reuse the material in the feed channel, which is beneficial to saving materials.

[0018] (2) The thermoforming mold and its feed part disclosed in the present invention have a feed channel that discharges material to the outlet of the thermoforming cavity, which becomes the boundary between the unformed material and the formed material, and the boundary is easy to break, which is conducive to reducing the difficulty of opening the mold.

[0019] (3) The thermoforming mold and feed piece thereof disclosed herein can be easily separated from the first mold assembly and the second mold assembly when the mold is opened, and are not easily adhered to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the thermoforming mold of the embodiment of the present invention.

[0021] Figure 2 2 is a cross-sectional view of a thermoforming mold according to an embodiment of the present disclosure taken along a section line.

[0022] Figure 3is a perspective view of a feed piece according to an embodiment of the present disclosure.

[0023] Figure 4 2 is a cross-sectional view of the thermoforming mold according to an embodiment of the present disclosure taken along another cross-sectional line.

[0024] Figure 5 It is a structural schematic diagram of the first mold assembly of an embodiment of the present disclosure.

[0025] 10. First mold assembly; 101. Thermoforming cavity; 11. First mold plate; 12. First mold core; 13. Lifting component; 131. First lifting component; 132. Second lifting component; 133. Lifting component;

[0026] 20. Second mold assembly; 21. Second sub-mold; 2101. Accommodating hole; 211. Anti-slip portion; 22. Elastic and telescopic member; 221. Stop member; 2211. Shaft; 2212. Shoulder; 222. Elastic member; 2102. Insertion channel; 2103. Inlet channel;

[0027] 30. Feeding member; 301. Feeding channel; 302. Cooling section; 3021. First sub-channel; 3022. Second sub-channel; 3023. Third sub-channel; 303. Coolant inlet; 304. Coolant outlet; 305. Discharge port;

[0028] 41. Coolant input pipe; 42. Coolant output pipe;

[0029] 900. Products. DETAILED DESCRIPTION

[0030] The following description is intended to disclose the present disclosure so that those skilled in the art can implement the present disclosure. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art may readily conceive of other obvious variations. The basic principles of the present disclosure defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present disclosure.

[0031] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0032] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0033] In this disclosure, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0034] In related art, a thermoforming mold is formed with a thermoforming cavity for thermoforming products and a feed channel connected to the thermoforming cavity to supply material to the thermoforming cavity. Thus, unprocessed material can enter the thermoforming cavity through the feed channel. When the thermoforming mold is heated, the material in the thermoforming cavity and the feed channel is heated and formed into shapes that match the thermoforming cavity and the feed channel, respectively. The material in the feed channel and the material in the thermoforming cavity are formed integrally.

[0035] When the technicians open the thermoforming mold to remove the product formed by the material in the thermoforming cavity, they need to separate the material in the thermoforming cavity from the material in the feed channel. As mentioned above, since the material in the feed channel and the material in the thermoforming cavity are integrally formed, it is difficult to separate the two, making it difficult to open the thermoforming mold. In addition, since the material in the feed channel has already been formed, after the mold is opened, the material in the feed channel can only be removed and discarded, resulting in material waste.

[0036] Figure 1 Schematic diagram of the structure of the thermoforming mold of the embodiment of the present invention. Figure 2 : is a cross-sectional view of the thermoforming mold according to the embodiment of the present disclosure along a section line. Figure 1 and Figure 2 The thermoforming mold of the embodiment of the present disclosure is used to thermoform an unformed material into a product 900 when heated. A thermoforming cavity 101 is formed in the thermoforming mold.

[0037] Optionally, the thermoforming mold includes a first mold assembly 10 and a second mold assembly 20. The second mold assembly 20 cooperates with the first mold assembly 10 to form the thermoforming cavity 101 capable of thermoforming the product 900. Thus, when unformed material is in the thermoforming cavity 101 and the thermoforming mold is heated, the unformed material is heated by the thermoforming cavity 101, thereby being molded into a structure that matches the shape of the thermoforming cavity 101. Furthermore, during this process, the mechanical properties of the unformed material are enhanced and improved. Thus, the thermoforming mold, through thermoforming processing, produces the product 900 having a predetermined shape and mechanical properties.

[0038] Exemplarily, the unmolded material may be a rubber material in a semi-fluid state. When the rubber material in the semi-fluid state is in the thermoforming cavity 101 and is heat-molded by the thermoforming cavity 101 due to the heating of the thermoforming mold, the rubber material can be thermoformed into a shape matching the thermoforming cavity 101, and the toughness of the rubber material can be enhanced, thereby enabling the thermoforming mold to be processed into a rubber product 900 having a certain shape and toughness after thermoforming.

[0039] The feed piece 30 for the thermoforming mold of the embodiment of the present disclosure forms a feed channel 301 for communicating with the thermoforming cavity 101. Thus, before thermoforming, the unformed material can enter the thermoforming cavity 101 through the feed channel 301, so that the thermoforming cavity 101 can be supplied with the unformed material. The feed piece 30 is provided with a cooling portion 302 for cooling the unformed material in the feed channel 301. Thus, when the thermoforming mold is heated to allow the unformed material in the thermoforming cavity 101 to be thermoformed, the cooling portion 302 can cool the unformed material in the feed channel 301, so that the unformed material in the feed channel 301 is kept below the molding heating temperature due to being cooled by the cooling portion 302, so that the unformed material in the feed channel 301 can remain in an unformed state when the product 900 is thermoformed.

[0040] Optionally, the cooling portion 302 includes a cooling channel formed in the feed member 30 for circulating a coolant. Thus, when the coolant, such as cooling water, is contained in the cooling channel, the cooling water can cool the feed member 30, thereby maintaining the unmolded material in the feed channel 301 below a predetermined temperature, thereby allowing the unmolded material in the feed channel 301 to remain in an unmolded state during thermoforming of the product 900.

[0041] Figure 3 3 is a perspective view of the feed member 30 according to an embodiment of the present disclosure. Figure 3The feed member 30 forms a coolant inlet 303 and a coolant outlet 304 in communication with the cooling channel, which are respectively connected to the coolant input pipe 41 and the coolant output pipe 42. In this way, a coolant, such as cooling water, can enter the cooling channel through the coolant input pipe 41 and the coolant inlet 303, and after flowing through the cooling channel, flow into the coolant output pipe 42 from the coolant outlet 304 and out of the coolant output pipe 42, thereby allowing the coolant to circulate within the cooling channel, thereby improving the cooling effect.

[0042] Optionally, the coolant inlet 303 and the coolant outlet 304 are located at the same height, whereby the coolant input pipe 41 and the coolant output pipe 42 are conveniently connected to the coolant inlet 303 and the coolant outlet 304 located at the same height, and the coolant input pipe 41 and the coolant output pipe 42 are conveniently arranged.

[0043] Optionally, the cooling channel includes at least one first sub-channel 3021, a second sub-channel 3022, and at least one third sub-channel 3023. The first sub-channel 3021 and the second sub-channel 3022 are connected to the coolant inlet 303 and the coolant outlet 304, respectively. The first sub-channel 3021 and the second sub-channel 3022 extend in the same direction as the feed channel 301 and are symmetrically arranged around the outer periphery of the feed channel 301. The third sub-channel 3023 extends along the outer periphery of the feed channel 301 and is connected to the first sub-channel 3021 and the second sub-channel 3022, respectively. As a result, the cooling channel provides a uniform cooling effect on the feed channel 301, thereby improving the cooling effect.

[0044] For example, when the unmolded material is a semi-fluid rubber material, and the temperature of the thermoforming cavity 101 reaches 170-180°C due to the heating of the thermoforming mold, the coolant circulates along the coolant input pipe 41, the coolant inlet 303, the first sub-channel 3021, the third sub-channel 3023, the second sub-channel 3022, the coolant outlet 304, and the coolant output pipe 42, causing the temperature in the feed channel 301 to reach 70-80°C. As a result, the unmolded material in the feed channel 301 is always maintained below 70-80°C during the thermoforming process, thereby allowing the unmolded material in the feed channel 301 to remain in an unmolded state when the product 900 is thermoformed. In addition, it is understood that the arrangement of the cooling channels disclosed herein includes but is not limited to this, and other circuitous arrangements may also be used. This is merely a preferred example to facilitate understanding by those skilled in the art.

[0045] In summary, since the material in the feed piece 30 is not heated and formed after the product 900 is thermoformed, the unformed material in the feed piece 30 can be reused as the thermoforming raw material for the next product 900. Therefore, the thermoforming mold of the embodiment of the present disclosure is beneficial to saving materials in the thermoforming process and avoiding material waste.

[0046] The thermoforming mold provided by the embodiment of the present disclosure includes a first mold assembly 10, a second mold assembly 20 and the feed piece 30, and the feed channel 301 of the feed piece 30 is connected to the thermoforming cavity 101 to supply unformed material to the thermoforming cavity 101.

[0047] From the above analysis, it can be seen that when the thermoforming mold of the embodiment of the present disclosure uses unformed materials to thermoform products, part of the material, that is, the material located in the feed channel 301, can be reused, the material consumption is small, and material waste can be avoided.

[0048] Optionally, the feed member 30 is provided on one of the first mold assembly 10 and the second mold assembly 20 .

[0049] For some examples, see Figure 2 , the feed piece 30 is provided on the first mold assembly 10 . In other examples, the feed piece 30 is provided on the second mold assembly 20 .

[0050] Since after the thermoforming process, the material in the thermoforming cavity 101 is thermoformed, and the material in the feed channel 301 is not thermoformed, the discharge port 305 from the feed channel 301 to the thermoforming cavity 101 forms a boundary between the unformed material with weaker mechanical properties and the formed material with stronger mechanical properties, and the boundary is prone to breakage. Therefore, when the first mold assembly 10 and the second mold assembly 20 are opened and separated to make the feed part 30 provided in the first mold assembly 10 away from the second mold assembly 20, or to make the feed part 30 provided in the second mold assembly 20 away from the first mold assembly 10, the material in the thermoforming mold is prone to breakage from the boundary, i.e., the discharge port 305, thereby avoiding the phenomenon that the first mold assembly 10 and the second mold assembly 20 are difficult to separate from each other due to the difficulty in breaking the material in the feed channel 301 and the material in the thermoforming cavity 101 when opening the mold, and can reduce the difficulty of opening the mold when the first mold assembly 10 and the second mold assembly 20 are opened.

[0051] Alternatively, taking the example of the feed piece 30 being installed in the second mold assembly 20, when the feed piece 30 is installed in the second mold assembly 20, the second mold assembly 20 forms an insertion channel 2102, and the second mold assembly 20 and the first mold assembly 10 cooperate to form an inlet flow channel 2103 that communicates with the insertion channel 2102 and the thermoforming cavity 101. The feed piece 30 is inserted into the insertion channel 2102, and the feed channel 301 communicates with the inlet flow channel 2103. Thus, material can enter the inlet flow channel 2103 through the feed channel 301, and then enter the thermoforming cavity 101 from the inlet flow channel 2103.

[0052] Figure 4 FIG is a cross-sectional view of the thermoforming mold according to an embodiment of the present disclosure taken along another cross-sectional line. Figure 2 and Figure 4 The second mold assembly 20 includes a second sub-mold 21 and at least one elastic telescopic member 22. The second sub-mold 21 cooperates with the first mold assembly 10 to form the thermoforming cavity 101. The second sub-mold 21 forms a receiving hole 2101 extending along the mold opening and closing direction and open toward the first mold assembly 10. The elastic telescopic member 22 is arranged in the receiving hole 2101. When the second sub-mold 21 is in mold closing cooperation with the first mold assembly 10, the elastic telescopic member 22 contracts in the receiving hole 2101. When the second sub-mold 21 is away from the first mold assembly 10, it extends out of the receiving hole 2101 and stops at the first mold assembly 10.

[0053] In this way, when the first mold assembly 10 and the second mold assembly 20 are closed, that is, when the second sub-mold 21 is closed and matched with the first mold assembly 10, the elastic telescopic member 22 shrinks to the accommodating hole 2101, so that the first sub-mold and the first mold assembly 10 can cooperate well and form the closed thermoforming cavity 101, ensuring the airtightness of the thermoforming cavity 101. When the first mold assembly 10 and the second mold assembly 20 are opened, that is, the second sub-mold 21 is moved away from the first mold assembly 10 to expose the product 900 formed between the second sub-mold 21 and the first mold assembly 10, as the second sub-mold 21 moves away, the elastic telescopic member 22 extends out of the accommodating hole 2101 and remains stopped at the first mold assembly 10. As a result, the first mold assembly 10 will not move with the second sub-mold 21, and the smooth separation between the second sub-mold 21 and the first mold assembly 10 can be ensured.

[0054] Optionally, there are multiple elastic members 22, and the multiple elastic members 22 are spaced apart around the circumference of the second sub-mold 21. In this way, during the separation process of the second sub-mold 21 and the first mold assembly 10, the multiple elastic members 22 can stop the first mold assembly 10 at multiple locations along the circumference of the first mold assembly 10, thereby maintaining balanced forces at multiple locations of the first mold assembly 10, and thus allowing the first mold assembly 10 to maintain a balanced and static state.

[0055] Optionally, the accommodating hole 2101 extends radially inward at one end near the first mold assembly 10 to form an anti-slip portion 211. The elastic telescopic member 22 includes a stop member 221 and an elastic member 222. The stop member 221 includes a shaft portion 2211 that can enter and exit the accommodating hole 2101, and a shoulder portion 2212 located in the accommodating hole 2101, extending radially along the shaft portion 2211, and capable of abutting against the anti-slip portion 211. The elastic member 222, such as a spring, is disposed between the other end wall of the accommodating hole 2101 and the shoulder portion 2212.

[0056] Thus, when the second sub-mold 21 and the first mold assembly 10 are closed, the shaft portion 2211 of the elastic telescopic member 22 can be completely received in the accommodating hole 2101 and abut against the first mold assembly 10. Furthermore, when the second sub-mold 21 is separated from the first mold assembly 10 to expose the product 900 formed between the second sub-mold 21 and the first mold assembly 10, the shaft portion 2211 of the stop member 221 can always remain abutted against the first mold assembly 10 under the action of the elastic member 222. Furthermore, when the distance between the second sub-mold 21 and the first mold assembly 10 is sufficiently large, the elastic member 222 pushes the shoulder portion 2212 of the stop member 221 to abut against the anti-slip portion 211, preventing the stop member 221 from slipping out of the accommodating hole 2101.

[0057] Figure 5 Schematic diagram of the structure of the first mold assembly 10 of the embodiment of the present disclosure. Figure 2 and Figure 5 The first mold assembly 10 includes a first template 11 and a first mold core 12. The first template 11 is disposed opposite the second mold assembly 20. The first mold core 12 is detachably disposed on the first template 11 and is located between the first template 11 and the second mold assembly 20. The first mold core 12, the first template 11, and the second mold assembly 20 cooperate to form the thermoforming cavity 101.

[0058] Therefore, after the first mold assembly 10 and the second mold assembly 20 are separated, the first mold core 12 can be separated from the first template 11 first, so that the molded product 900 can be separated from the first template 11, and then the molded product 900 can be pulled out from the first mold core 12, thereby completing the demolding of the product 900. In this way, the demolding process of the product 900 after the mold is opened is carried out in steps, and the product 900 is gradually exposed in the step-by-step demolding process, and the difficulty of demolding the product 900 after the mold is opened is small.

[0059] Optionally, the first mold core 12 is disposed above the first template 11, and the first mold assembly 10 further includes a lifting component 13. The lifting component 13 is connected to the first mold core 12 to lift the first mold core 12 to separate the first mold core 12 from the first template 11.

[0060] Specifically, the lifting component 13 includes a first lifting member 131, a second lifting member 132, and a lifting member 133. The first lifting member 131 and the second lifting member 132 are disposed on opposite sides of the first mold core 12. The lifting member 133 is installed between the first lifting member 131 and the second lifting member 132 and is connected to the first mold core 12 to lift the first mold core 12 when the first lifting member 131 and the second lifting member 132 are lifted, thereby separating the first mold core 12 from the first mold plate 11 located therebelow. The separation of the first mold core 12 is convenient and the first mold core 12 can remain relatively balanced during separation.

[0061] Those skilled in the art will appreciate that the embodiments of the present disclosure described above and shown in the accompanying drawings are provided for illustrative purposes only and do not limit the present disclosure. The advantages of the present disclosure have been fully and effectively realized. The functional and structural principles of the present disclosure have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present disclosure without departing from the principles described.

Claims

1. Feeding piece, characterized in that, include: A feed channel connected to a thermoforming cavity of a thermoforming mold is provided with a cooling portion for cooling the feed channel. The cooling portion includes a cooling channel formed in the feed piece for circulating a coolant.

2. The feed piece according to claim 1, characterized in that: The feed member forms a coolant inlet and a coolant outlet communicated with the cooling channel, and is used to communicate with a coolant input pipe and a coolant output pipe respectively.

3. The feed piece according to claim 2, characterized in that: The cooling channel includes: at least one first sub-channel and a second sub-channel, extending in the same direction as the feed channel and arranged on the outer peripheral side of the feed channel; and at least one third sub-channel, extending along the outer peripheral side of the feed channel and connected to the first sub-channel and the second sub-channel respectively.

4. Thermoforming mold, characterized in that, include: a first mold assembly; a second mold assembly, cooperating with the first mold assembly to form a thermoforming cavity capable of thermoforming the thermoforming cavity; as well as The feed piece according to any one of claims 1 to 3, wherein the feed channel of the feed piece is connected to the thermoforming cavity.

5. The thermoforming mold according to claim 4, characterized in that: The feed piece is arranged on one of the first mold assembly and the second mold assembly.

6. The thermoforming mold according to claim 4, characterized in that The second mold assembly includes: a second sub-mold, cooperating with the first mold assembly to form the thermoforming cavity, forming a receiving hole extending along the mold opening and closing direction and opening toward the first mold assembly; and At least one elastic telescopic member is provided in the accommodating hole, and contracts in the accommodating hole when the second sub-mold is engaged with the first mold assembly; and extends out of the accommodating hole and stops at the first mold assembly when the second sub-mold is away from the first mold assembly.

7. The thermoforming mold according to claim 6, characterized in that There are multiple elastic stretchable parts, and the multiple elastic stretchable parts are arranged at intervals around the circumference of the second sub-mold.

8. The thermoforming mold according to claim 6, characterized in that One end of the accommodating hole close to the first mold assembly extends radially inward to form an anti-slip portion; The elastic telescopic part includes: a stop part, including a shaft portion that can enter and exit the accommodating hole and a shoulder portion located in the accommodating hole, extending radially along the shaft portion and capable of abutting against the anti-slip portion; and an elastic part, arranged between the other end wall of the accommodating hole and the shoulder portion.

9. The thermoforming mold according to claim 4, characterized in that: The first mold assembly includes: A first template, disposed opposite to the second mold assembly; and The first mold core is detachably provided on the first template and is located between the first template and the second mold assembly. The first mold core, the first template and the second mold assembly cooperate to form the thermoforming cavity.

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