Adjustable length forming die

Abstract

The utility model relates to material forming die technical field, concretely relates to a length adjustable forming die. Including upper die set, lower die set and spacing end plate, upper die set includes two upper side end die, at least one upper adjusting die between two upper side end die and is used for the compression assembly that two upper side end die and upper adjusting die are transversely compact, upper adjusting die abuts upper side end die or adjacent upper adjusting die, two upper side end die connect upper adjusting die and form the upper chamber that penetrates upper adjusting die, lower die set is equipped with lower chamber, and when lower die set abuts and connects upper die set, lower chamber connects upper chamber and forms the plastic cavity for shaping to the product to be shaped, spacing end plate is fixed on the upper die set end face or lower die set end face, and abuts upper die set end face and lower die set end face and carries out transverse spacing. Through the number of adjusting die of increasing and reducing adjustment, the length of plastic cavity is adjusted to adapt to the product to be shaped, has higher versatility.

Description

Technical Field

[0001] This utility model relates to the field of material forming mold technology, specifically to a length-adjustable forming mold. Background Technology

[0002] Currently, fixed-length molding dies are often used when producing cylindrical or tubular products. These dies include upper and lower dies with fixed lengths. The lengths of the upper and lower dies are not adjustable, resulting in low versatility. To meet the diverse needs of products, the entire set of dies needs to be replaced when producing products of different lengths, leading to excessively high production costs. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the aforementioned background technology and provide a length-adjustable molding die.

[0004] The technical solution adopted in this utility model is: a length-adjustable molding die, which includes, The upper mold assembly includes two upper end molds, at least one upper adjusting mold located between the two upper end molds, and a clamping assembly for laterally pressing the two upper end molds and the upper adjusting mold. The upper adjusting mold abuts against the upper end mold or an adjacent upper adjusting mold, and the two upper end molds are connected to the upper adjusting mold to form an upper cavity penetrating the upper adjusting mold. The lower mold assembly includes two lower end molds, at least one lower adjusting mold located between the two lower end molds, and a clamping assembly for laterally pressing the two lower end molds and the lower adjusting mold together; the two lower end molds are connected to the lower adjusting mold to form a lower cavity penetrating the lower adjusting mold; when the lower mold assembly abuts against the upper mold assembly, the lower cavity is connected to the upper cavity to form a molding cavity for molding the product to be molded. A limiting end plate is fixed on the end face of the upper mold group or the end face of the lower mold group, and simultaneously abuts against the end face of the upper mold group and the end face of the lower mold group to limit the lateral movement of the upper mold group and the lower mold group.

[0005] Furthermore, the upper adjusting mold includes various length specifications.

[0006] Furthermore, the clamping assembly includes an end positioning through hole on the upper end mold, a middle positioning through hole on the upper adjusting mold, a positioning screw that passes through both end positioning through holes and the middle positioning through hole, and a clamping nut bolted to the positioning bolt.

[0007] Furthermore, the upper mold assembly is equipped with multiple sets of clamping components.

[0008] Furthermore, the bottom surface of the upper adjusting mold is provided with a second molding groove; when the two upper end molds and the upper adjusting mold are pressed laterally, one or more second molding grooves are connected to form the upper cavity.

[0009] Furthermore, the bottom surface of the upper end mold is provided with a first molding groove, and the first molding groove extends laterally from one end of the upper end mold to the end face of the upper end mold. The two first molding grooves and at least one second molding groove are connected to form the upper cavity.

[0010] Furthermore, it also includes an upper mounting plate, which is provided with a transverse guide groove, and both the upper end mold and the upper adjusting mold are provided with sliding parts that slide laterally within the guide groove.

[0011] Furthermore, the sliding element is a fixing bolt, which is threaded onto the upper end mold and the upper adjusting mold respectively, and is used to fix the upper end mold and the upper adjusting mold onto the upper mounting plate by passing through the guide groove.

[0012] Furthermore, the guide groove is a T-shaped groove, and the fixing bolt is located inside the T-shaped groove and does not protrude from the side of the upper mounting plate when tightened.

[0013] Furthermore, a longitudinal positioning component is provided between the upper mold assembly and the lower mold assembly; the longitudinal positioning component includes a positioning protrusion and a positioning groove for coupling the positioning protrusion.

[0014] Furthermore, the positioning protrusion is provided on the bottom surface of the upper mold assembly and the positioning groove is provided on the top surface of the lower mold assembly, or the positioning protrusion is provided on the top surface of the lower mold assembly and the positioning groove is provided on the bottom surface of the upper mold assembly.

[0015] Furthermore, the positioning grooves are provided laterally on the bottom surface of the upper end mold and the bottom surface of the upper adjusting mold, and multiple positioning grooves are coaxially connected when the two upper end molds abut against and connect to the upper adjusting mold.

[0016] Furthermore, it also includes an inner core, the cross-sectional dimension of which is smaller than the cross-sectional dimension of the molding cavity, and the inner core is used to form tubular products within the molding cavity.

[0017] Furthermore, the limiting end plate or the upper end mold is provided with a fixing hole for positioning and fixing the inner core, and the end of the inner core is inserted into the fixing hole.

[0018] Furthermore, it also includes a lower mounting plate, on which scale lines are provided along the length of the molding cavity; the zero point of the scale lines is located on one end face of the molding cavity.

[0019] Furthermore, the lower mounting plate is provided with a transverse guide groove, and both the lower end mold and the lower adjustment mold are provided with sliding parts that slide laterally within the guide groove.

[0020] Furthermore, the lower mounting plate is located on the bottom surface of the lower end mold and the lower adjusting mold.

[0021] Furthermore, the bottom surface of the lower end mold is provided with a third molding groove, which extends laterally out of the end face of the lower end mold; the bottom surface of the lower adjustment mold is provided with a fourth molding groove; when the positioning screw passes through the two lower end molds and the lower adjustment mold and is pressed, the two third molding grooves and the fourth molding groove are connected to form the lower cavity.

[0022] The beneficial effects of this utility model include: 1. The number of upper adjustable molds can be selected according to the length requirements of the product to be molded. They are installed between two upper end molds. The two upper end molds and at least one adjustable mold in the middle are pressed together by the clamping assembly to form an upper cavity. When the length of the lower mold group is adapted to the upper mold group and abuts against the upper mold group, the limiting end plate abuts against the end face of the upper mold group and the end face of the lower mold group for lateral limiting. The upper cavity and the lower cavity are connected to form a molding cavity for molding the product to be molded. It is convenient to use. The number of upper adjustable molds can be selected to adapt to the length of the product to be molded. There is no need to replace the entire set of molding molds. It has high versatility. 2. The clamping assembly has a simple structure and is easy to use. After the two upper end molds are connected to the upper adjusting mold, the clamping nut is bolted on after the positioning bolts pass through the positioning holes at both ends and the middle positioning hole. This can clamp the two upper end molds and at least one upper adjusting mold laterally, avoiding gaps at the connection between the upper adjusting mold and the upper end mold or adjacent upper adjusting molds, which would cause the molded product to be unsatisfactory. 3. When the upper end mold is connected to at least one upper adjusting mold, the two first molding grooves and at least one second molding groove are connected to form the upper cavity, which is convenient to use; 4. The sliding parts of the upper end mold and the upper adjusting mold can slide in the guide groove on the mounting plate, which facilitates lateral alignment after adding or removing the upper adjusting mold; 5. When the sliding component is a fixed bolt, it can be bolted to the upper mounting plate when it slides to the upper end mold and / or the upper adjusting mold to prevent the upper mold assembly from sliding on the upper mounting plate during production. 6. The upper and lower mold assemblies can be longitudinally aligned using the longitudinal positioning component; it is positioned by coupling positioning protrusions and positioning grooves, which is simple in structure, easy to use, and low in cost. 7. The positions of the positioning protrusions and positioning grooves are replaceable; 8. Moldable tubular products with an inner core located within the molding cavity; 9. The lower mold assembly and the upper mold assembly have basically similar structures, which facilitates production when used interchangeably; 10. The lower mounting plate of the lower mold assembly is equipped with scale lines. The zero point of the scale lines is located on one end face of the molding cavity, which makes it easy to intuitively judge whether the length of the formed mounting cavity meets the length requirements of the product.

[0023] This utility model relates to an adjustable-length molding die, which is used for molding cylindrical or tubular products. The upper end die and the upper adjusting die are laterally pressed together by a clamping component to form an upper cavity. The length of the upper die assembly can be adjusted by increasing or decreasing the number of upper adjusting dies, that is, the length of the upper cavity can be adjusted. The lower die assembly is adapted to the upper die assembly to adjust the length of the molding cavity, which is convenient for producing products of different lengths and has high versatility. Attached Figure Description

[0024] Figure 1 : A front view structural diagram of an adjustable-length molding die; Figure 2 : Side view of the adjustable length molding die; Figure 3 : A top view of the adjustable-length molding die; Figure 4 :for Figure 1 Schematic diagram of the cross-sectional structure at DD in the diagram; Figure 5 :for Figure 1 A schematic diagram of the cross-sectional structure at point AA; Figure 6 :for Figure 1 A cross-sectional view of the structure at point CC; Figure 7 :for Figure 2 A schematic diagram of the cross-sectional structure at point BB; Wherein: 1-Upper mold assembly; 11-Upper side end mold; 12-Upper adjusting mold; 121-Second molding groove; 13-Upper chamber; 14-Pressure assembly; 141-Positioning screw; 142-Pressure nut; 15-Sliding component; 2-Lower mold assembly; 21-Lower side end mold; 22-Lower adjusting mold; 221-Third molding groove; 23-Lower chamber; 3-Limiting end plate; 4-Molding cavity; 5-Positioning groove; 6-Positioning protrusion; 7-Inner core; 8-Scale line; 9-Upper mounting plate; 91-Guide slide groove; 10-Lower mounting plate. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary. The drawings are not drawn to scale and are intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] This utility model relates to a length-adjustable molding die for molding cylindrical or tubular products. The number of upper adjustable molds 12 can be selected according to the required length of the product to be molded. These molds are installed between two upper end molds 11. A clamping assembly 14 presses the two upper end molds 11 and at least one middle adjustable mold together to form an upper chamber 13. When the lower mold assembly 2 is of the same length as the upper mold assembly 1 and abuts against it, a limiting end plate 3 simultaneously abuts against the end faces of both the upper mold assembly 1 and the lower mold assembly 2 for lateral limiting. The upper chamber 13 and the lower chamber 23 are connected to form a molding cavity 4 for molding the product. This design is convenient to use, allows selection of the number of upper adjustable molds 12 to match the length of the product to be molded, and eliminates the need to replace the entire molding die set, thus exhibiting high versatility.

[0030] An adjustable-length molding die, specifically, such as Figures 1-7As shown, the assembly includes an upper mold group 1, a lower mold group 2, and a limiting end plate 3. The upper mold group 1 includes two upper end molds 11, at least one upper adjusting mold 12 located between the two upper end molds 11, and a clamping assembly 14 for laterally (in the product length direction) pressing the two upper end molds 11 and the upper adjusting mold 12. The upper adjusting mold 12 abuts against the upper end mold 11 or an adjacent upper adjusting mold 12. The two upper end molds 11 are connected to the upper adjusting mold 12 to form an upper cavity 13 that penetrates the upper adjusting mold 12. The lower mold group 2 is provided with a lower cavity 23. The lower mold group 2 is adapted to abut against the upper mold group 1. When abutting against the upper mold group 1, the lower cavity 23 is connected to the upper cavity 13 to form a molding cavity 4 for molding the product to be molded. The limiting end plate 3 is fixed on the end face of the upper mold group 1 or the end face of the lower mold group 2, and simultaneously abuts against the end face of the upper mold group 1 and the end face of the lower mold group 2 to laterally limit the upper mold group 1 and the lower mold group 2. In use, the number of upper adjusting molds 12 is selected according to the length of the product to be molded, so that the length of the molding cavity 4 is adapted to the length of the product to be molded. When using multiple upper adjusting modules, the multiple upper adjusting molds 12 are connected laterally in sequence and located between the two upper end molds 11.

[0031] The upper adjustment mold 12 includes various length specifications, such as 100, 150, 200, 500 mm, etc. Several upper adjustment molds 12 of the same or different length specifications can be selected according to the length of the product to be formed.

[0032] In one embodiment, such as Figure 1 and 7 As shown, the clamping assembly 14 includes an end positioning through hole on the upper end mold 11, a middle positioning through hole on the upper adjusting mold 12, a positioning screw 141 that passes through both end positioning through holes and the middle positioning through hole (or multiple through holes), and a clamping nut 142 bolted to the positioning screw. That is, when the upper end mold 11 sequentially abuts against and connects to the upper adjusting mold 12 (at least one) and another upper end mold 11, the end positioning holes at both ends are coaxially connected to at least one middle positioning through hole. The positioning screw 141 is inserted from the end positioning through hole at one end, passes through the middle positioning through hole and the end positioning through hole at the other end, and then screwed with the clamping nut 142. This allows the two upper end molds 11 and at least one upper adjusting mold 12 to be laterally clamped, preventing gaps at the connection between the upper adjusting mold 12 and the upper end mold 11 or adjacent upper adjusting molds 12, which could lead to unsatisfactory molded products. The structure is simple and easy to use.

[0033] Preferably, such as Figure 2 As shown, the upper mold assembly 1 is provided with multiple sets of clamping components 14; multiple positioning screws 141 pass through the upper end mold 11 and the upper adjusting mold 12 of the upper mold assembly 1 and are bolted with clamping nuts 142, thereby increasing and uniformly distributing the circumferential clamping force and reducing the gap at the connection between the upper adjusting mold 12 and the upper end mold 11 or the adjacent upper adjusting mold 12.

[0034] In one implementation scheme, such as Figures 4-6 As shown, the bottom surface of the upper adjusting mold 12 is provided with a second molding groove 121; when the two upper end molds 11 and the upper adjusting mold 12 are pressed laterally, one or more second molding grooves 121 are connected to form an upper chamber 13, and the end face of the upper chamber 13 abuts against the upper end mold 11, which is convenient to use.

[0035] In another specific embodiment, the bottom surface of the upper end mold 11 is provided with a first molding groove, and the first molding groove extends laterally from one end of the upper end mold 11. The two first molding grooves and at least one second molding groove 121 are connected to form an upper chamber 13.

[0036] In one implementation scheme, such as Figure 3 , 4 and Figure 6 As shown, this utility model also includes an upper mounting plate 9, which is provided with a transverse guide groove 91. Both the upper end mold 11 and the upper adjusting mold 12 are provided with sliding members 15 that slide laterally within the guide groove 91, facilitating sliding alignment when adding or removing the upper adjusting mold 12. Optionally, the upper mounting plate 9 is provided on the top surface of the upper end mold 11 and the upper adjusting mold 12.

[0037] Based on the upper mounting plate 9 having a transverse guide groove 91, such as Figure 3 and Figure 5 As shown, the sliding member 15 is a fixing bolt, which is threaded onto the upper end mold 11 and the upper adjusting mold 12 respectively. It is used to pass through the guide groove 91 to fix the upper end mold 11 and the upper adjusting mold 12 onto the upper mounting plate 9. In use, after selecting the number of upper adjusting molds 12 to abut between the two upper end molds 11, tighten the fixing bolts to bolt the upper end mold 11 and the upper adjusting mold 12 onto the upper mounting plate 9, so as to prevent the upper end mold 11 and the upper adjusting mold 12 from sliding relative to the mounting plate during production.

[0038] Preferably, such as Figure 6 As shown, the guide groove 91 is a T-shaped groove. When the fixing bolt is tightened, it is located inside the T-shaped groove and does not protrude from the side of the upper mounting plate 9. The end of the fixing bolt away from the nut is threaded, and the middle section of the bolt slides against the side wall of the guide groove 91 to provide guidance.

[0039] In some implementations, such as Figure 6 As shown, a longitudinal positioning component is provided between the upper mold group 1 and the lower mold group 2; the longitudinal positioning component includes a positioning protrusion 6 and a positioning groove 5 for coupling the positioning protrusion 6.

[0040] In one specific design, the positioning protrusion 6 is located on the bottom surface of the upper mold assembly 1, and the positioning groove 5 is located on the top surface of the lower mold assembly 2.

[0041] In another specific solution, such as Figure 6 As shown, multiple sets of longitudinal positioning components are provided between the upper mold group 1 and the lower mold group 2; the positioning protrusion 6 is provided on the top surface of the lower mold group 2, and the positioning groove 5 is provided on the bottom surface of the upper mold group 1. In actual use, the positioning groove 5 is provided laterally on the bottom surface of the upper end mold 11 and the bottom surface of the upper adjusting mold 12. When the two upper end molds 11 abut against the upper adjusting mold 12, the multiple positioning grooves 5 are coaxially connected.

[0042] In one implementation, such as Figures 4-6 As shown, this adjustable-length molding die also includes an inner core 7. The cross-sectional dimensions of the inner core 7 are smaller than those of the molding cavity 4. The inner core 7 is used to form tubular products within the molding cavity 4. The end face of the inner core 7 can abut against the upper mold assembly 1 and the lower mold assembly 2, or extend beyond the upper mold assembly 1 and the lower mold assembly 2. As needed, the inner core 7 can be coaxially positioned within the molding cavity 4, so that the formed tubular product has a symmetrical structure.

[0043] Optionally, the limiting end plate 3 or the upper end mold 11 is provided with a fixing hole for positioning and fixing the inner core 7, and the end of the inner core 7 is inserted into the fixing hole.

[0044] It is worth noting that, without conflict, in order to realize the function of this length-adjustable molding die in selecting the length and shaping the product, the lower mold group 2 may have some structures that are the same as or different from those of the upper mold group 1.

[0045] like Figure 1 As shown, the lower mold assembly 2 includes two lower end molds 21, at least one lower adjusting mold 22 located between the two lower end molds 21, and a clamping assembly 14 for laterally pressing the two lower end molds 21 and the lower adjusting mold 22. The two lower end molds 21 are connected to the lower adjusting mold 22 to form a lower cavity 23 that penetrates the lower adjusting mold 22, so that the number of lower adjusting molds 22 can be selected to match the length of the lower cavity 23 of the lower mold assembly 2 to match the length of the upper cavity 13 (i.e., to match the length of the product to be molded).

[0046] In one specific implementation, such as Figure 5 As shown, this utility model also includes a lower mounting plate 10, on which a scale line 8 is provided along the length direction of the molding cavity 4; the zero point of the scale line 8 is located on one end face of the molding cavity 4; a pointing mark is provided on the lower end mold 21 located on the other side of the molding cavity 4, the pointing mark corresponding to the end face of the molding cavity 4 of its lower end mold 21, for pointing to the scale line 8.

[0047] Preferably, the upper mounting plate 9 is provided with a scale line 8 along the length of the upper chamber 13, and the zero point of the scale line 8 is located on one side end face of the upper chamber 13.

[0048] Multiple sets of upper mold groups 1 and lower mold groups 2 can be provided between the upper mounting plate 9 and the lower mounting plate 10 for use; as shown in the figure, the upper mounting plate 9 is provided with two sets of upper mold groups 1, and the lower mounting plate 10 is provided with two sets of lower mold groups 2.

[0049] like Figure 6 As shown, the lower mounting plate 10 is provided with a transverse guide groove 91. Both the lower end mold 21 and the lower adjusting mold 22 are provided with sliding members 15 that slide laterally within the guide groove 91. The sliding member 15 can also be a fixing bolt. The guide groove 91 is a T-shaped groove. Optionally, the lower mounting plate 10 is located on the bottom surface of the lower end mold 21 and the lower adjusting mold 22.

[0050] In one alternative, the bottom surface of the lower end mold 21 is provided with a third molding groove 221, which extends laterally out of the end face of the lower end mold 21; the bottom surface of the lower adjusting mold 22 is provided with a fourth molding groove; when the positioning screw 141 passes through the two lower end molds 21 and the lower adjusting mold 22 and is pressed, the two third molding grooves 221 and the fourth molding groove are connected to form a lower chamber 23.

[0051] In actual use, the upper mold assembly 1 and lower mold assembly 2 of this length adjustable forming mold are fixed to the vulcanizing machine by the upper mounting plate 9 and lower mounting plate 10, respectively. According to the length of the product to be formed, an appropriate number and corresponding specifications of upper adjusting molds 12 are selected and laterally abutted between the two upper end molds 11. The upper end molds 11 and upper adjusting molds 12 slide along the guide groove 91 and continuously abut against each other. The positioning screws 141 are used to pass through one upper end mold 11, the upper adjusting mold 12 and the other upper end mold 11 in sequence and then tightened to press them together. Nut 142, use fixing bolts to fix the upper end mold 11 and the upper adjusting mold 12 to the upper mounting plate 9; adjust the length of the lower mold group 2 in the same way, observe the scale line 8 corresponding to the indicator to determine whether the length of the molding cavity 4 is consistent with the length of the product to be molded. If they are consistent, put the inner core 7 into the molding cavity 4 (the inner core 7 is not required for cylindrical products), put the molding raw material in according to the existing vulcanization process, and then put the upper mold group 1 and the lower mold group 2 into the mold to form the molded cavity 4, and then start working with the vulcanizing machine.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A length-adjustable forming mold, characterized in that: include, The upper mold assembly (1) includes two upper end molds (11), at least one upper adjusting mold (12) located between the two upper end molds (11), and a clamping assembly (14) for laterally pressing the two upper end molds (11) and the upper adjusting mold (12). The upper adjusting mold (12) abuts against the upper end mold (11) or an adjacent upper adjusting mold (12). The two upper end molds (11) are connected to the upper adjusting mold (12) to form an upper chamber (13) that penetrates the upper adjusting mold (12). The lower mold assembly (2) includes two lower end molds (21), at least one lower adjusting mold (22) located between the two lower end molds (21), and a clamping assembly (14) for laterally pressing the two lower end molds (21) and the lower adjusting mold (22); the two lower end molds (21) are connected to the lower adjusting mold (22) to form a lower cavity (23) that penetrates the lower adjusting mold (22); when the lower mold assembly (2) abuts against the upper mold assembly (1), the lower cavity (23) is connected to the upper cavity (13) to form a molding cavity (4) for molding the product to be molded; Limiting end plate (3) is fixed on the end face of the upper mold group (1) or the end face of the lower mold group (2), and simultaneously abuts against the end face of the upper mold group (1) and the end face of the lower mold group (2) to laterally limit the upper mold group (1) and the lower mold group (2).

2. The length-adjustable forming mold as described in claim 1, characterized in that: The clamping assembly (14) includes an end positioning through hole on the upper end mold (11), a middle positioning through hole on the upper adjusting mold (12), a positioning screw (141) passing through both the end positioning through hole and the middle positioning through hole, and a clamping nut (142) bolted to the positioning bolt.

3. The length-adjustable forming mold as described in claim 2, characterized in that: The bottom surface of the upper adjusting mold (12) is provided with a second molding groove (121); when the two upper end molds (11) and the upper adjusting mold (12) are pressed laterally, one or more second molding grooves (121) are connected to serve as the upper chamber (13).

4. The length-adjustable forming mold as described in claim 3, characterized in that: The bottom surface of the upper end mold (11) is provided with a first molding groove. The first molding groove extends laterally from one end of the upper end mold (11) to the end face. The two first molding grooves and at least one second molding groove (121) are connected to form the upper chamber (13).

5. The length-adjustable forming mold as described in claim 1, characterized in that: It also includes an upper mounting plate (9), which is provided with a transverse guide groove (91), and both the upper end mold (11) and the upper adjustment mold (12) are provided with sliding parts (15) that slide laterally in the guide groove (91).

6. The length-adjustable forming mold as described in claim 5, characterized in that: The sliding member (15) is a fixing bolt, which is threaded onto the upper end mold (11) and the upper adjusting mold (12) respectively, and is used to pass through the guide groove (91) to fix the upper end mold (11) and the upper adjusting mold (12) onto the upper mounting plate (9).

7. A length-adjustable forming mold as described in any one of claims 1-5, characterized in that: A longitudinal positioning component is provided between the upper mold assembly (1) and the lower mold assembly (2); the longitudinal positioning component includes a positioning protrusion (6) and a positioning groove (5) for coupling the positioning protrusion (6).

8. The length-adjustable forming mold as described in claim 7, characterized in that: The positioning protrusion (6) is located on the bottom surface of the upper mold assembly (1) and the positioning groove (5) is located on the top surface of the lower mold assembly (2), or the positioning protrusion (6) is located on the top surface of the lower mold assembly (2) and the positioning groove (5) is located on the bottom surface of the upper mold assembly (1).

9. The length-adjustable forming mold as described in claim 1, characterized in that: It also includes an inner core (7), the cross-sectional size of which is smaller than that of the molding cavity (4), and the inner core (7) is used to form tubular products in the molding cavity (4).

10. The length-adjustable forming mold as described in claim 1, characterized in that: It also includes a lower mounting plate (10), on which a scale line (8) is provided along the length of the molding cavity (4); the zero point of the scale line (8) is located on one side end face of the molding cavity (4).

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