Mould accessory and mould

Abstract

The utility model discloses a mould accessory and a mould, which are characterized in that the mould accessory comprises a pin shaft part and a positioning part, the positioning part is arranged on the side of the pin shaft part, and a limiting surface is arranged on the pin shaft part; the positioning part comprises a mounting piece, a positioning piece and a pushing piece, the outer end of the positioning piece is arranged on the mounting piece in a sliding mode, the pushing piece is arranged in the mounting piece, the pushing piece gives pushing force for the positioning piece to move inwards, and the inner end of the positioning piece is pushed to stretch out of the mounting piece and is arranged over the limiting face. According to the utility model, the replacement convenience of the floating pin and the positioning pin is improved, the production efficiency is improved, the replacement difficulty is reduced, and the potential safety hazard is also reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of mould, especially a kind of mould accessory and mould, mainly applied to stamping die. BACKGROUND

[0002] The clamp is a kind of annular clamp made of metal material, mainly used for pipeline connection, which connects the end of two pipelines or pipeline and equipment through fastening bolt, with the characteristics of simplicity and efficiency.

[0003] Among them, the metal clamp is made of metal material, and in the clamp manufacturing process, there is a process of continuous strap blanking and punching process, and the types of clamps are very rich, so the types of straps are also more, for example, the commonly used strap width is 12mm-55mm, to adapt to the production of different types of clamps with different width. Among them, in order to reduce cost, the punching size on the strap is different for different width, so different molds do not need to be replaced. In order to produce clamps of different sizes (mainly the width of the strap is relatively close) with the same mold, when producing a clamp, the floating pin and the positioning pin need to be replaced to make the strap feeding and positioning accurate, and the size of the floating pin and the positioning pin is replaced, such as Figure 1 、 2 As shown in the prior art structure, the floating pin 001 and the positioning pin 002 have hanging tables 003 at the bottom, which limit the freedom of upward movement of the floating pin and the positioning pin, to prevent them from being pushed out too much by the spring and causing the floating pin and the positioning pin to disengage from the mold.

[0004] When replacing, the staff detaches the strap blanking die from the hydraulic machine, turns over the lower die, detaches the two rows of floating pins, positioning pins and spring nuts (spring is used to lift the floating pin and the positioning pin out of the top surface of the lower die), takes out the spring and the floating pin and the positioning pin, then assembles the corresponding floating pin and spring, and screws on the nut (limits the bottom of the spring), finally installs the mold on the hydraulic machine for use, that is, adjusts the width between the two rows of floating pins and positioning pins to adapt to the positioning of the strap punching and blanking of the strap with similar width. From detaching the mold, replacing the floating pin and the positioning pin to installing the mold back to the hydraulic machine, it takes 20-35 minutes, which wastes time, and the replacement efficiency is low, the labor intensity of the operator is high, and the production efficiency is low. Moreover, the same mold can only punch the strap with similar width, and the same mold cannot adapt to the punching of the strap with certain deviation in width, and the compatibility is poor. Similarly, for other types of products (non-clamp), stamping also has the same problem. SUMMARY

[0005] The utility model aims at providing a mould accessory and mould, through using the structure, have improved the convenience and efficiency of pin shaft part replacement, have also improved production efficiency and compatibility.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of a kind of mould accessory, including pin shaft part and positioning part, the positioning part is set in the side of pin shaft part, it is equipped with a limit surface on pin shaft part;

[0007] The positioning part includes mounting, positioning piece and pusher, the outer end of positioning piece is slidably arranged on the mounting, the pusher is arranged in the mounting, the pusher gives the push force that positioning piece moves towards inside, and the inner end of positioning piece is pushed out of the mounting and is arranged above the limit surface.

[0008] In the above technical scheme, a sliding slot is provided in the mounting, the positioning piece is slidably arranged in the sliding slot, and the pusher is arranged in the sliding slot of the outer end of the positioning piece.

[0009] In the above technical scheme, the top of the mounting is provided with a notch in communication with the sliding slot, and the top of the positioning piece is provided with a positioning hole, and the positioning hole is arranged opposite to the notch.

[0010] In the above technical scheme, the pusher is a spring, one end of the spring abuts on the outer end surface of the positioning piece, and the other end of the spring abuts on the mounting, or the other end of the spring abuts on the mould.

[0011] In the above technical scheme, the pin shaft part is a positioning pin, the positioning pin includes coaxially arranged first upper part and first lower part, the bottom of the first upper part is connected with the top surface middle part of the first lower part, the outer diameter of the first upper part is smaller than the outer diameter of the first lower part, the top surface of the first lower part on the outer side of the first upper part constitutes the limit surface, the inner end of the positioning piece is pushed by the pusher to be close to or abut on the outer surface of the first upper part, and the inner end of the positioning piece is above the limit surface.

[0012] In the above technical scheme, the pin shaft part is a floating pin, the floating pin includes a pin body with a column structure, a material pressing groove is arranged on the outer surface of the pin body and close to the top of the pin body.

[0013] A positioning groove is further arranged on the outer surface of the pin body and below the material pressing groove, the bottom surface of the positioning groove constitutes the limit surface, and the inner end of the positioning piece is inserted into the positioning groove by the pusher.

[0014] In the above technical scheme, the thickness of the positioning piece inserted into the positioning groove is smaller than the length of the positioning groove.

[0015] In the technical scheme, the pressing groove is an annular groove or a square groove.

[0016] In the technical scheme, the top of the positioning groove is communicated with the pressing groove.

[0017] The utility model discloses a mould, including upper die and lower die, the mould accessory is even number, be equipped with the installation site for installing the pin shaft part and the positioning portion on the lower die, the installation site includes the installation hole and the installation groove that communicate with each other, the positioning portion is installed in the installation groove, the pin shaft part is installed in the installation hole below, the bottom of installation hole is equipped with reset member that pushes the pin shaft part and moves upwards, the reset member pushes the pin shaft part and moves upwards, and makes the limiting surface and be on the bottom surface of the positioning piece.

[0018] In the technical scheme, the lower die is provided with at least two rows of installation sites which are oppositely arranged, and each row of installation sites is composed of a plurality of installation sites arranged along the length direction of the lower die.

[0019] In the technical scheme, the adjacent installation sites in each row are arranged in staggered manner.

[0020] Due to the above technical scheme, the utility model has the following advantages compared with the prior art:

[0021] 1. The pin shaft part is provided with a limiting surface in the utility model, a positioning portion is arranged beside the pin shaft part, a positioning piece is arranged on the positioning portion, the positioning piece is pushed to move above the limiting surface by a pushing piece, the upward movement of the pin shaft part is limited by the positioning piece, and the positioning piece can compress the pushing piece, so that the pin shaft part is convenient to install and disassemble, the convenience of replacing the pin shaft part is effectively improved, the labor intensity of the operator is reduced, and the production efficiency is improved.

[0022] 2. The pin shaft part is a positioning pin or a floating pin in the utility model, the design of the hanging table at the bottom of the positioning pin and the floating pin is cancelled, a limiting surface is arranged on the pin shaft part, the upward limiting is realized by the cooperation of the positioning portion and the limiting surface, when the pin shaft part needs to be replaced, the pin shaft part can be pulled out upward from the top surface of the lower die directly to disassemble and replace without the limitation of the hanging table, the mould does not need to be disassembled from the stamping equipment, the replacement time can be saved by more than 70%, the replacement efficiency is effectively improved, the convenience of replacement is improved, the labor intensity of the operator is reduced, and the production efficiency is improved.

[0023] 3. The pin shaft part does not need to be disassembled from the mould when being replaced in the utility model, and the safety hazard can be reduced.

[0024] 4. The utility model discloses a lower die upper surface is provided with at least two rows of opposite installation site of setting, and installation site is used for the installation of pin shaft part and positioning part, and the inside and outside of the adjacent installation site in each row of installation site is staggered, can install mould accessories in different installation site according to different width product, make the space between two rows of installation sites can position the product of different width, make the mould can produce and process the product of different width, improve compatibility, reduce cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structure diagram of floating pin in the background art;

[0026] Figure 2 It is the structure diagram of positioning pin in the background art;

[0027] Figure 3 It is the structure diagram of mould accessory in the utility model embodiment one (pin shaft part is positioning pin);

[0028] Figure 4 It is the structure diagram of mould accessory in the utility model embodiment one (pin shaft part is floating pin);

[0029] Figure 5 It is the structure diagram of positioning part in the utility model embodiment one;

[0030] Figure 6 It is the structure diagram of positioning pin in the utility model embodiment one;

[0031] Figure 7 It is the structure diagram of floating pin in the utility model embodiment one;

[0032] Figure 8 It is the structure diagram of mould accessory in the utility model embodiment one (pin shaft part is floating pin);

[0033] Figure 9 It is the structure diagram of mould in the utility model embodiment one (product is placed in the mould and prepares the structure diagram of stamping process);

[0034] Figure 10 It is the structure diagram of product multiple sets of mould accessory and product in the utility model embodiment one (reset piece in the mould shows, and pin shaft part is positioning pin and floating pin respectively);

[0035] Figure 11 It is the structure diagram of the top of lower die in the utility model embodiment one (is provided with four rows of installation site).

[0036] Wherein:001, floating pin;002, positioning pin;003, hanging table;1, mold fitting;11, pin shaft part;110, positioning pin;1101, first upper part;1102, first lower part;112, floating pin;1121, pin body;1122, pressure material groove;1123, positioning groove;12, positioning part;120, mounting piece;121, positioning piece;122, pushing piece;1201, sliding groove;1202, notch;1210, positioning hole;13, limiting surface;2, upper die;3, lower die;31, mounting hole;32, mounting groove;33, reset piece;4, product. DETAILED DESCRIPTION

[0037] The utility model will be further described in connection with the drawings and embodiments:

[0038] Embodiment one: refer to Figures 3-11 The limiting surface 13 is arranged on the pin shaft part 11.

[0039] The positioning part 12 includes mounting piece 120, positioning piece 121 and pushing piece 122, the outer end of the positioning piece 121 is slidably arranged on the mounting piece 120, the pushing piece 122 is arranged in the mounting piece 120, the pushing piece 122 gives the positioning piece 121 the pushing force that moves towards the inside, and the inner end of the positioning piece 121 is pushed to stretch out the mounting piece 120 and is arranged above the limiting surface 13.

[0040] The utility model also provides a kind of mold, refer to Figures 9-11 The mold fitting 1 is even number, the limiting surface 13 is arranged on the pin shaft part 11, and the limiting surface 13 is arranged on the positioning part 12;The lower die 3 is equipped with the installation site for installing the pin shaft part 11 and the positioning part 12, and the installation site includes the mounting hole 31 and the mounting groove 32 that are interconnected;The positioning part 12 is installed in the mounting groove 32, and the pin shaft part 11 is installed in the mounting hole 31 below;The bottom of the mounting hole 31 is equipped with reset piece 33, which pushes the pin shaft part 11 to move upwards;Reset piece 33 pushes the pin shaft part 11 to move upwards, and the limiting surface 13 is arranged on the bottom surface of the positioning piece 121.

[0041] In the embodiment, the mold is a stamping mold, and the pin shaft part is a floating pin and / or a positioning pin, which can be selected according to actual conditions. The floating pin is used for positioning, adjusting and floating of the product, and the product 4 is positioned and floated by the floating pins on both sides when moving in the mold, so that the product is not attached to the lower mold after the mold is opened, facilitating the movement of the product. The positioning pin is used for positioning of the side of the product, and the positioning pin can be arranged at the feeding end or the discharging end of the product (the material belt) to limit the side of the product, so that the product moves in a fixed track in the mold, preventing the product from deviating in the mold and ensuring the processing precision of the product.

[0042] The pushing member 122 is a spring, and when the mold accessory 1 is installed in the mold, each pin shaft part 11 has a reset member 33 below the pin shaft part 11, which pushes the pin shaft part 11 upward. The reset member 33 is preferably a guide spring, the bottom of the reset member abuts against the upper surface of the lower mold 3, and the top of the reset member 33 abuts against the bottom surface of the pin shaft part 11. The reset member 33 pushes the pin shaft part 11 upward, so that the limiting surface 13 also moves upward and abuts against the bottom surface of the positioning member 121. When the pin shaft part 11 is replaced, the mold is opened, and the upper mold 2 moves away from the lower mold 3, so that the top surface of the lower mold 3 is completely exposed. Then, an external force is applied to the positioning member 121 to move outward, overcoming the elastic force of the pushing member 122, so that the positioning member 121 moves outward away from the pin shaft part 11 and moves to the side of the limiting surface 13, not above the limiting surface 13. At this time, the pin shaft part 11 is no longer limited to move upward, and then the operator can take out the pin shaft part 11 from the installation hole 31. When installing, the positioning member 121 is also moved outward by an external force, and then the pin shaft part 11 is placed below the installation hole 31 and is pressed downward, so that the reset member 33 is compressed, and the plane where the limiting surface 13 is located is below the bottom plane of the positioning member 121. Then, the external pulling force of the positioning member 121 is released, and the restoring force of the pushing member 122 pushes the positioning member 121 to move inward, so that the inner end of the positioning member 121 is close to the pin shaft part 11 and moves to the top of the limiting surface 13. At this time, the pin shaft part 11 is released from the downward pressure, the reset member 33 pushes the pin shaft part 11 upward, the limiting surface 13 contacts the bottom surface of the inner end of the positioning member 121, and the upward movement of the pin shaft part 11 is limited by the positioning member 121. In this way, the pin shaft part is convenient and fast to replace, and the mold does not need to be detached from the stamping equipment, improving the convenience of replacing the pin shaft part and reducing the difficulty of replacement. At the same time, since the mold does not need to be detached from the stamping equipment, the safety hazard is reduced. The replacement speed is improved, and the production efficiency is improved.

[0043] As shown in Figure 5 , 8 , the installation member 120 is provided with a sliding groove 1201, the positioning member 121 is slidingly arranged in the sliding groove 1201, and the pushing member 122 is arranged in the sliding groove 1201 at the outer end of the positioning member 121.

[0044] The setting of the sliding groove guides the movement of the positioning member, ensures the accurate movement position, and makes the positioning member be above the limiting surface when moving inward.

[0045] As shown in Figure 5 、 8 , the top of the mounting member 120 is provided with a notch 1202 which is communicated with the sliding groove 1201, and the top of the positioning member 121 is provided with a positioning hole 1210 which is arranged opposite to the notch 1202.

[0046] When the pin shaft part needs to be replaced, in order to facilitate the outward movement of the positioning member away from the limiting surface and the compression of the spring (pushing member), a positioning hole is arranged at the top of the positioning member, and a notch is arranged at the top of the mounting member, and a tool, for example, an L-shaped inner hexagon, is inserted into the positioning hole, and then the inner hexagon is pulled through the positioning hole to move the positioning member outward and compress the spring, so that the inner end of the positioning member is away from the limiting surface, thereby releasing the limiting of the upward movement of the pin shaft part.

[0047] One end of the spring is abutted against the outer end surface of the positioning member 121, and the other end of the spring is abutted against the mounting member 120 or the mold (lower mold).

[0048] In the embodiment, the sliding groove is a structure which is penetrated through two ends, therefore, one end of the spring is abutted against the outer end of the positioning member, and the other end of the spring is abutted against the inner wall of the mounting groove of the mold. Of course, if the sliding groove is a structure which is penetrated through one side, the other end of the spring is abutted against the end of the other end of the sliding groove, and the spring is always in a compressed state, and always has elastic restoring force, thereby always giving the positioning member a pushing force to move inward, so that the positioning member is above the limiting surface, and limits the upward movement of the pin shaft part from the mold.

[0049] In the utility model, the pin shaft part has two kinds, the first kind: as shown in Figure 3 、 6As shown, the pin shaft part 11 is a positioning pin 110, which comprises coaxially arranged first upper part 1101 and first lower part 1102, the bottom of the first upper part 1101 is connected with the middle of the top surface of the first lower part 1102, the outer diameter of the first upper part 1101 is smaller than that of the first lower part 1102, the top surface of the first lower part 1102 outside the first upper part 1101 constitutes the limiting surface 13, the pushing piece 122 pushes the inner end of the positioning piece 121 close to or against the outer surface of the first upper part 1101, and makes the inner end of the positioning piece 121 above the limiting surface 13.

[0050] In the embodiment, the first lower part of the positioning pin is completely in the mounting hole, the first lower part is below the inner end of the positioning piece, in the extension state of the reset piece, the top of the first upper part is exposed above the top surface of the lower mold, the first upper part is used for limiting the side of the product, the limiting surface is against the bottom surface of the inner end of the positioning piece, in the mold closing (the upper mold is pressed on the lower mold, and the product is punched), the upper mold pushes the positioning pin downward, the reset piece is pressed downward, and the limiting surface is moved downward away from the positioning piece. In the embodiment, the hanging table is not arranged on the outer surface below the first lower part (in the original structure, the hanging table is arranged, the diameter of the hanging table is greater than that of the first lower part, the bottom of the lower mold is provided with a hole for mounting the reset piece, the size of the hole is greater than or equal to the diameter of the hanging table, the diameter of the hole and the hanging table is greater than the diameter of the mounting hole, the hanging table cannot enter the mounting hole, so that the pin shaft part is limited to move upward and separate from the lower mold), in this way, after the positioning piece is moved outward away from the limiting surface of the positioning pin, the positioning pin can move upward and separate from the top of the mounting hole, the positioning pin is directly put into the mounting hole from the top of the mounting hole during installation, the positioning pin is quickly replaced, the installation difficulty is reduced, the installation convenience is improved, the mold does not need to be detached from the stamping equipment, the safety hazard is reduced, and the replacement time is reduced.

[0051] The second structure of the pin shaft part is shown in Figure 4 、 7 , 8, the pin shaft part 11 is a floating pin 112, the floating pin 112 comprises a column type pin body 1121, the outer surface of the pin body 1121 is provided with a material pressing groove 1122, the material pressing groove 1122 is arranged close to the top of the pin body 1121;

[0052] The outer surface of the pin body 1121 is also provided with a positioning groove 1123, the positioning groove 1123 is arranged below the material pressing groove 1122, the bottom surface of the positioning groove 1123 constitutes the limiting surface 13, the inner end of the positioning piece 121 is inserted into the positioning groove 1123 by the pushing piece 122.

[0053] In the embodiment, the bottom of the floating pin is also not provided with a hanging table (the structure of the hanging table is similar to that of the positioning pin described above, which will not be described here), and the pressing groove is used for limiting the side of the product. After the mold is opened, the product is lifted up and separated from the top surface of the lower mold by the pressing groove, which facilitates the movement of the product. Since the floating pin is a column structure, in order to realize the limiting of the positioning member to the upward movement of the floating pin, a positioning groove is arranged on the outer surface of the floating pin, and the length direction of the positioning groove is parallel to the axis direction of the floating pin, that is, the positioning groove extends vertically, the bottom surface of the positioning groove constitutes the limiting surface, and the inner end of the positioning member is inserted into the positioning groove. When the mold is closed, the upper mold presses the floating pin downward, and the return member is compressed, and most of the floating pin is pressed into the lower mold. During this process, the positioning groove moves downward relative to the positioning member. When the mold is opened, the upper mold moves away from the lower mold, and the restoring force of the return member pushes the floating pin upward, and the positioning groove moves upward relative to the positioning member until the bottom surface (limiting surface) of the positioning groove and the bottom surface of the positioning member are in contact. The bottom surface of the positioning member and the positioning groove limit the upward movement of the floating pin. When the floating pin needs to be replaced, the positioning member is pulled outward, so that the inner end of the positioning member is separated from the positioning groove, a pulling force is applied to the floating pin to move upward, the floating pin is taken out from the lower mold, and then the floating pin to be replaced is placed in the mounting hole and pressed into position so that the positioning member faces the positioning groove. Then, the outward force of the positioning member is released, and the spring pushes the positioning member inward, so that the inner end of the positioning member is inserted into the positioning groove, thereby realizing the limiting of the floating pin.

[0054] In the embodiment, the diameter of the mounting hole is adapted to the first lower part of the positioning pin and the outer diameter of the floating pin, so as to prevent the pin shaft part from moving radially relative to the mounting hole, and to ensure the stability of the pin shaft part in limiting the product.

[0055] In the embodiment, after the replacement of the pin shaft part is completed, a downward pressure is applied to the top of the pin shaft part to test whether the pin shaft part can move normally. If the pin shaft part can move up and down normally and smoothly, the installation of the pin shaft part is normal, and then the product to be processed is placed in the mold for testing. If the test is correct, the mold can work normally.

[0056] In order to ensure that the floating pin 112 can move up and down relative to the positioning member 121 normally, so that the floating pin 112 has a certain axial movement degree of freedom, the thickness of the positioning member 121 inserted into the positioning groove 1123 is less than the length of the positioning groove 1123.

[0057] The pressing groove 1122 is a ring-shaped groove or a square groove. In the embodiment, the pressing groove is a ring-shaped groove, and the processing of the ring-shaped groove is more convenient, and the processing difficulty and cost are lower.

[0058] More preferably, the top of the positioning groove communicates with the pressing groove, which facilitates the processing of the pressing groove and the positioning groove.

[0059] The lower mould 3 is provided with at least two rows of installation positions which are oppositely arranged, and each row of the installation positions is composed of a plurality of installation positions arranged along the length direction of the lower mould 3.

[0060] Referring to Figure 11 In the embodiment, the lower mould is provided with four rows of installation positions, and one mould accessory is installed in each installation position, that is, the lower mould is provided with four rows of mould accessories, and the first row of mould accessories, the second row of mould accessories, the third row of mould accessories and the fourth row of mould accessories are sequentially arranged from left to right in the direction of the drawing, wherein the pin shaft part in the first row of mould accessories and the third row of mould accessories is located at the right side of the corresponding positioning part, the pin shaft part in the second row of mould accessories and the fourth row of mould accessories is located at the left side of the corresponding positioning part, each pin shaft part of the first row of mould accessories is opposite to each pin shaft part of the second row of mould accessories, and each pin shaft part of the third row of mould accessories is opposite to each pin shaft part of the fourth row of mould accessories. In this way, a product stamping channel is formed between the first row of mould accessories and the second row of mould accessories, and another product stamping channel is formed between the third row of mould accessories and the fourth row of mould accessories, that is, two product stamping channels are separately arranged, and in this way, cutters which are opposite to the two product stamping channels can be arranged on the upper mould, so that two groups of products can be processed at the same time, and the processing efficiency is high. Meanwhile, the widths of the different product stamping channels can be inconsistent, and the product processing of different sizes is applicable, so that the compatibility of the mould for products of different sizes is improved, and the processing efficiency is improved.

[0061] Referring to Figure 11 In the drawing, the adjacent installation positions in each row are arranged in staggered positions. In the foregoing, one installation position is located at the front end left side of the adjacent rear side installation position, or is located at the front end right side. In this way, the installation positions are arranged in staggered positions, and part of the installation positions arranged in intervals is close to the outer side, and part is close to the inner side. In the two rows of installation positions, the plurality of mould accessories on the installation positions at the outer side form a product stamping channel with a width, and the plurality of mould accessories on the installation positions at the inner side form another product stamping channel with a width. According to the products with different widths, the mould accessories can be installed on the corresponding installation positions (or the mould accessories are installed on all the installation positions, and for the products with smaller width, the mould accessories on the installation positions at the inner side are used, and for the products with larger width, the pin shaft part on the installation positions at the inner side is removed, and the pin shaft part on the installation positions at the outer side can be used), so that the same product stamping channel can process products with different widths, the compatibility is improved (for the products with the same punching size), and the mould cost is reduced.

[0062] In the description of the utility model, need understanding is, the term "upper", "lower", "top", "bottom", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only is for the convenience of describing the present application and simplifying the description, and is not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the limitation to the present application. In the description of the utility model, the meaning of "a plurality of" is two or more than two, unless there is a clear specific limitation.

[0063] In the utility model, unless there is a clear provision and limitation, the term "installation", "connection", "connect", "fix" and so on should be broad understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, for example, two through abutment, contact and so on form mechanical abutment or contact connection mode, two also can be directly hung or through intermediate medium hang up and connect and so on, also can be two element internal communication or two element interaction relation. For the ordinary skilled person in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific situation.

Claims

1. A mold fitting characterized by: The pin shaft part (11) and the positioning part (12) are arranged on the side of the pin shaft part (11), and a limiting surface (13) is arranged on the pin shaft part (11); The positioning part (12) comprises a mounting part (120), a positioning part (121) and a pushing part (122), the outer end of the positioning part (121) is slidingly arranged on the mounting part (120), the pushing part (122) is arranged in the mounting part (120), the pushing part (122) gives the positioning part (121) a pushing force to move inward, and the inner end of the positioning part (121) is pushed out of the mounting part (120) and arranged above the limiting surface (13).

2. The mold fitting according to claim 1, characterized by: A sliding groove (1201) is arranged in the mounting part (120), and the positioning part (121) is slidingly arranged in the sliding groove (1201), and the pushing part (122) is arranged in the sliding groove (1201) at the outer end of the positioning part (121).

3. The mold fitting according to claim 2, characterized by: A notch (1202) is arranged at the top of the mounting part (120) and communicates with the sliding groove (1201), and a positioning hole (1210) is arranged at the top of the positioning part (121), and the positioning hole (1210) is arranged opposite to the notch (1202).

4. The mold fitting of claim 1, wherein: The pushing part (122) is a spring, one end of the spring abuts against the outer end surface of the positioning part (121), and the other end of the spring abuts against the mounting part (120) or a mold.

5. The mold fitting of claim 1, wherein: The pin shaft part (11) is a positioning pin (110), the positioning pin (110) comprises a coaxially arranged first upper part (1101) and a first lower part (1102), the bottom of the first upper part (1101) is connected with the middle part of the top surface of the first lower part (1102), the outer diameter of the first upper part (1101) is smaller than the outer diameter of the first lower part (1102), the top surface of the first lower part (1102) on the outer side of the first upper part (1101) constitutes the limiting surface (13), the inner end of the positioning part (121) is pushed by the pushing part (122) to be close to or abut against the outer surface of the first upper part (1101), and the inner end of the positioning part (121) is arranged above the limiting surface (13).

6. The mold fitting of claim 1, wherein: The pin shaft part (11) is a floating pin (112), the floating pin (112) comprises a column-shaped pin body (1121), a material pressing groove (1122) is arranged on the outer surface of the pin body (1121) and close to the top of the pin body (1121); A positioning groove (1123) is further arranged on the outer surface of the pin body (1121) and below the material pressing groove (1122), the bottom surface of the positioning groove (1123) constitutes the limiting surface (13), and the inner end of the positioning part (121) is inserted into the positioning groove (1123) by the pushing part (122).

7. The mold fitting of claim 6, wherein: The thickness of the positioning member (121) inserted into the positioning slot (1123) is less than the length of the positioning slot (1123).

8. The mold fitting of claim 6, wherein: The pressing slot (1122) is a ring slot or a square slot.

9. The mold fitting of claim 6, wherein: The top of the positioning slot (1123) is communicated with the pressing slot (1122).

10. A mould comprising an upper die (2) and a lower die (3), characterised in that: The lower mold (3) is provided with a plurality of sets of the mold assembly (1) according to any one of claims 1-9, and is provided with mounting positions for mounting the pin shaft part (11) and the positioning part (12), the mounting positions comprising mounting holes (31) and mounting slots (32) which are communicated with each other, the positioning part (12) is mounted in the mounting slot (32), the lower part of the pin shaft part (11) is mounted in the mounting hole (31), the bottom of the mounting hole (31) is provided with a reset member (33) for pushing the pin shaft part (11) to move upward, the reset member (33) pushes the pin shaft part (11) to move upward, and the limiting surface (13) is abutted against the bottom surface of the positioning member (121).

11. The mold of claim 10, wherein: The lower mold (3) is provided with at least two rows of the mounting positions which are oppositely arranged, and each row of the mounting positions is composed of a plurality of mounting positions which are arranged along the length direction of the lower mold (3).

12. The mold of claim 11, wherein: The adjacent mounting positions in each row are arranged in a staggered manner.

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