Mould and method for connecting plastic strips

Abstract

The invention relates to the technical field of plastic molds, and discloses a plastic strip connecting mold which comprises a top plate and a bottom plate, a top mold is detachably mounted at the bottom of the top plate, an upper mold core is detachably mounted at the bottom of the top mold, an injection molding nozzle is embedded in the center of the top of the top plate, and a main runner groove is formed in the top of the top mold; limiting columns are fixedly installed on the two sides of the top mold, and a cooling water injection nozzle A is embedded in the side face of the top mold. After the upper mold core and the lower mold core are closed, a plastic medium is injected into the main runner groove through the injection molding nozzle, then the plastic medium downwards flows into the branch runner grooves and then flows into the rope grooves in the two sides from the branch runner grooves, and the plastic medium flows into the interior of the connecting piece; and then cooling water is used for cooling the upper mold core and the lower mold core, and the connected strip-shaped objects can be taken out after the upper mold core and the lower mold core are opened, so that the aim of quickly and firmly connecting the two strip-shaped objects is fulfilled.

Description

Technical Field

[0001] The invention relates to the technical field of plastic moulds, in particular to a mould and a method for connecting plastic strips. Background Art

[0002] Plastic strips are generally connected by hot melt connection. The ends of the plastic strips to be connected are heated to a semi-melted state through some kind of heating equipment, and then the workers quickly and accurately put the ends of the two plastic pipes together, and they will be connected after cooling. This connection method is most suitable for plastic pipes. The process is complicated and inefficient. However, when it comes to other plastic strips such as plastic coated ropes and plastic solid pipes, the connection will not be strong enough. Even if the connection is made in time, there will be accumulated particles after the melt, which is not beautiful enough. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the present invention provides a mold and method for connecting plastic strips, which have the advantages of firm connection and high efficiency and solve the above-mentioned problems.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose of firm and efficient connection, the present invention provides the following technical solutions: a plastic strip connection mold, comprising a top plate and a bottom plate, a top mold is detachably mounted on the bottom of the top plate, an upper mold core is detachably mounted on the bottom of the top mold, an injection nozzle is embedded in the top center of the top plate, a main flow channel groove is opened on the top of the top mold, limiting columns are fixedly mounted on both sides of the top mold, and a cooling water injection nozzle A is embedded on the side of the top mold;

[0007] A bottom mold is fixedly installed on the top of the bottom plate, pull plates are fixedly installed on both sides of the bottom mold, vertical guide rods are inserted at the four corners of the surface of the bottom mold, a cooling water injection nozzle B is embedded on the side of the bottom mold, and a lower mold core is detachably installed on the top of the bottom mold.

[0008] Preferably, a jig outer frame is provided on the front and rear sides of the lower die core, a connecting plate is detachably mounted on the end of the jig outer frame, the connecting plate and the side of the lower die core are detachably mounted, a tray is fixedly mounted on the side of the jig outer frame, and a slide groove arranged at equal intervals is provided on the top of the jig outer frame, a jig spring block is slidably mounted inside the slide groove, a spring is fixedly mounted on the side of the jig spring block, and the spring is embedded in a reserved groove of the jig outer frame.

[0009] Preferably, rope grooves are provided on the surface of the lower die core, and branch flow channel grooves are provided between the rope grooves.

[0010] Preferably, a water-drawing needle is detachably mounted on the top of the top plate, and the bottom of the water-drawing needle penetrates downward into the interior of the main flow channel groove, and the through hole extending downward from the main flow channel groove is interconnected with the branch flow channel groove.

[0011] Preferably, the top mold is slidably connected to the bottom mold via a vertical guide rod.

[0012] A plastic strip comprises a strip object, the surface of which is etched with scale values, a connecting piece is sleeved between the strip objects, and the strip object and the connecting piece form a rope groove for injection molding production.

[0013] A method for connecting plastic strips, comprising the following steps:

[0014] S1: Remove the lower die core and the jig outer frame in advance, then insert the connector into the middle of the rope groove, and then insert the ends of the bar object into the two ends of the connector, leaving a two-millimeter gap between the ends of the bar object, and then insert the bar object into the remaining rope groove. Similarly, the bar object will also be inserted into the channel formed by the jig spring block and the slide groove, and the spring will push the jig spring block to clamp the bar object;

[0015] S2: Then install the lower mold core and the fixture frame on the bottom mold, and use the external injection molding press to push the top plate, top mold and upper mold core down along the vertical guide rod, and the upper mold core will cover the top of the lower mold core;

[0016] S3: The external injection molding press pumps the plastic medium through the injection nozzle, and the plastic medium flows into the branch flow channel groove through the main flow channel groove. The plastic medium in the branch flow channel groove flows to both sides into the rope groove and flows into the connector;

[0017] S4: External cooling water is injected into the upper mold core and the lower mold core through cooling water injection nozzle A and cooling water injection nozzle B respectively to cool them themselves;

[0018] S5: Then the external injection molding press pulls the top plate, top mold and upper mold core upward along the vertical guide rod, and at this time, the pull needle will pull out the residual plastic in the through hole extending downward in the main runner groove;

[0019] S6: Finally, the connecting pieces and the bar-shaped objects connected together can be removed.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a mold and method for connecting plastic strips, which have the following beneficial effects:

[0022] 1. The mold and method for connecting plastic strips have rope grooves on the opposite surfaces of the upper mold core and the lower mold core, so that multiple groups of strip objects can be connected at one time, realizing one mold with multiple holes, thereby improving the connection efficiency.

[0023] 2. The mold and method for connecting plastic strips, after the upper mold core and the lower mold core are closed, the plastic medium is injected into the interior of the main flow channel through the injection nozzle, and then the plastic medium flows downward into the interior of the branch flow channel groove, and then flows from the branch flow channel groove to the rope grooves on both sides, and the plastic medium flows into the interior of the connecting piece, and then the upper mold core and the lower mold core are cooled by cooling water. After opening the upper mold core and the lower mold core, the connected strip object can be taken out. This method achieves the purpose of quickly and firmly connecting the two strip objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the side-view stereoscopic structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure after decomposition of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the present invention after being decomposed and viewed from above;

[0028] Figure 5 It is a schematic diagram of the partial cutaway structure of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the lower mold core and the fixture outer frame of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the lower mold core of the present invention;

[0031] Figure 8 It is a schematic diagram of the structure of the connecting piece and the bar-shaped object of the present invention.

[0032] In the figure: 1. top plate; 2. bottom plate; 3. top mold; 4. bottom mold; 5. vertical guide rod; 6. pull plate; 7. limit column; 8. cooling water injection nozzle A; 9. cooling water injection nozzle B; 10. upper mold core; 11. lower mold core; 12. fixture frame; 13. connecting plate; 14. tray; 15. fixture spring block; 16. spring; 17. rope groove; 18. connector; 19. strip object; 20. injection nozzle; 21. pull nozzle; 22. main runner groove; 23. branch runner groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-8 A mold for connecting plastic strips, comprising a top plate 1 and a bottom plate 2, a top mold 3 is detachably mounted on the bottom of the top plate 1, an upper mold core 10 is detachably mounted on the bottom of the top mold 3, an injection nozzle 20 is embedded in the top center of the top plate 1, a main flow channel groove 22 is opened on the top of the top mold 3, limiting columns 7 are fixedly mounted on both sides of the top mold 3, and a cooling water injection nozzle A8 is embedded on the side of the top mold 3; external cooling water enters the interior of the top mold 3 through the cooling water injection nozzle A8 to cool the top mold 3.

[0035] A bottom mold 4 is fixedly installed on the top of the bottom plate 2, and pull plates 6 are fixedly installed on both sides of the bottom mold 4. Vertical guide rods 5 are inserted and installed at the four corners of the surface of the bottom mold 4. The top mold 3 is slidably connected with the bottom mold 4 through the vertical guide rods 5. A cooling water injection nozzle B9 is embedded on the side of the bottom mold 4, and a lower mold core 11 is detachably installed on the top of the bottom mold 4. External cooling water enters the interior of the bottom mold 4 through the cooling water injection nozzle B9 to cool the bottom mold 4 and the lower mold core 11.

[0036] A jig outer frame 12 is provided at the front and back of the lower mold core 11, and a connecting plate 13 is detachably installed at the end of the jig outer frame 12, and the connecting plate 13 and the side of the lower mold core 11 are detachably installed. A tray 14 is fixedly installed on the side of the jig outer frame 12 for lifting the drooping rope body; the top of the jig outer frame 12 is provided with equally spaced slide grooves, and a jig spring block 15 is slidably installed inside the slide groove, and a spring 16 is fixedly installed on the side of the jig spring block 15, and the spring 16 is embedded in the reserved groove of the jig outer frame 12. The spring 16 pushes the jig spring block 15 to move sideways, and the jig spring block 15 can clamp the rope body.

[0037] The surface of the lower mold core 11 is provided with a rope groove 17, and a branch flow channel groove 23 is provided between the rope grooves 17 and the rope grooves 17. A pull-mouth water needle 21 is detachably installed on the top of the top plate 1, and the bottom of the pull-mouth water needle 21 penetrates downward into the interior of the main flow channel groove 22. After the plastic medium is injected, the pull-mouth water needle 21 moves upward to pull out the residual plastic medium in the through hole; the through hole extending downward from the main flow channel groove 22 is connected to the branch flow channel groove 23.

[0038] A plastic strip includes a strip object 19, the surface of which is etched with scale values, a connector 18 is set between the strip objects 19, and the strip objects 19 and the connector 18 form a rope groove 17 for injection molding production.

[0039] Working principle: S1: Remove the lower die core 11 and the jig outer frame 12 in advance, then insert the connecting piece 18 into the middle of the rope groove 17, and then insert the ends of the strip object 19 into the two ends of the connecting piece 18, leaving a two-millimeter gap between the ends of the strip object 19, and then insert the strip object 19 into the remaining rope groove 17. Similarly, the strip object 19 will also be inserted into the channel formed by the jig spring block 15 and the slide groove, and the spring 16 will push the jig spring block 15 to clamp the strip object 19;

[0040] S2: The lower mold core 11 and the fixture frame 12 are then installed on the bottom mold 4, and the top plate 1, the top mold 3 and the upper mold core 10 are pushed down along the vertical guide rod 5 by an external injection molding press, and the upper mold core 10 will cover the top of the lower mold core 11;

[0041] S3: The external injection molding press pumps the plastic medium through the injection nozzle 20, and the plastic medium flows into the branch flow channel groove 23 through the main flow channel groove 22. The plastic medium in the branch flow channel groove 23 flows to both sides to the rope groove 17 and flows into the connecting piece 18;

[0042] S4: External cooling water is injected into the upper mold core 10 and the lower mold core 11 through the cooling water injection nozzle A8 and the cooling water injection nozzle B9 respectively to cool them themselves;

[0043] S5: Then the external injection molding press pulls the top plate 1, the top mold 3 and the upper mold core 10 upward along the vertical guide rod 5, and at this time, the pull needle 21 will pull out the residual plastic in the through hole extending downward in the main flow channel groove 22;

[0044] S6: Finally, the connecting piece 18 and the strip-shaped object 19 connected together can be taken down.

[0045] In summary, the mold and method for connecting plastic strips, by providing rope grooves 17 on the opposite surfaces of the upper mold core 10 and the lower mold core 11, can connect multiple groups of strip objects 19 at one time, realizing one mold with multiple holes, thereby improving the connection efficiency.

[0046] The mold and method for connecting plastic strips are as follows: after the upper mold core 10 and the lower mold core 11 are closed, the plastic medium is injected into the interior of the main flow channel 22 through the injection nozzle 20, and then the plastic medium flows downward into the interior of the branch flow channel 23, and then flows from the branch flow channel 23 to the rope grooves 17 on both sides, and the plastic medium flows into the interior of the connecting piece 18, and then the upper mold core 10 and the lower mold core 11 are cooled by cooling water. After the upper mold core 10 and the lower mold core 11 are opened, the connected strip object 19 can be taken out, and this method achieves the purpose of quickly and firmly connecting the two strip objects 19.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold for connecting plastic strips, comprising a top plate (1) and a bottom plate (2), characterized in that: A top mold (3) is detachably mounted on the bottom of the top plate (1), an upper mold core (10) is detachably mounted on the bottom of the top mold (3), an injection nozzle (20) is embedded in the center of the top of the top plate (1), a main flow channel groove (22) is opened on the top of the top mold (3), limiting columns (7) are fixedly mounted on both sides of the top mold (3), and a cooling water injection nozzle A (8) is embedded on the side of the top mold (3); A bottom mold (4) is fixedly installed on the top of the bottom plate (2), pull plates (6) are fixedly installed on both sides of the bottom mold (4), vertical guide rods (5) are inserted and installed at the four corners of the surface of the bottom mold (4), a cooling water injection nozzle B (9) is embedded in the side of the bottom mold (4), and a lower mold core (11) is detachably installed on the top of the bottom mold (4).

2. A plastic strip connection mold according to claim 1, characterized in that: A jig outer frame (12) is provided at the front and rear sides of the lower mold core (11); a connecting plate (13) is detachably mounted on the end of the jig outer frame (12); the connecting plate (13) and the side of the lower mold core (11) are detachably mounted; a tray (14) is fixedly mounted on the side of the jig outer frame (12); a sliding groove arranged at equal intervals is provided on the top of the jig outer frame (12); a jig spring block (15) is slidably mounted inside the sliding groove; a spring (16) is fixedly mounted on the side of the jig spring block (15); and the spring (16) is embedded in a reserved groove of the jig outer frame (12).

3. The mold for connecting plastic strips according to claim 1, characterized in that: A rope groove (17) is provided on the surface of the lower mold core (11), and a branch flow channel groove (23) is provided between the rope grooves (17).

4. The mold for connecting plastic strips according to claim 3, characterized in that: A water-drawing needle (21) is detachably mounted on the top of the top plate (1), and the bottom of the water-drawing needle (21) penetrates downward into the interior of the main flow channel groove (22), and a through hole extending downward from the main flow channel groove (22) is interconnected with the branch flow channel groove (23).

5. The mold for connecting plastic strips according to claim 1, characterized in that: The top mold (3) is slidably connected to the bottom mold (4) via a vertical guide rod (5).

6. A plastic strip, characterized in that: The invention comprises a strip-shaped object (19), the surface of which is etched with scale values, a connecting piece (18) is set between the strip-shaped objects (19) and the strip-shaped objects (19), and the strip-shaped objects (19) and the connecting piece (18) are used for injection molding to produce the rope groove (17) according to any one of claims 1 to 5.

7. A method for connecting plastic strips, characterized in that: The following steps are involved: S1: Remove the lower die core (11) and the jig outer frame (12) in advance, then insert the connecting piece (18) into the middle section of the rope groove (17), and then insert the ends of the strip object (19) into the two ends of the connecting piece (18), leaving a two-millimeter gap between the ends of the strip objects (19), and then insert the strip object (19) into the remaining rope groove (17). Similarly, the strip object (19) will also be inserted into the channel formed by the jig spring block (15) and the slide groove, and the spring (16) will push the jig spring block (15) to clamp the strip object (19); S2: The lower mold core (11) and the jig frame (12) are then installed on the bottom mold (4), and the top plate (1), the top mold (3) and the upper mold core (10) are pushed downward along the vertical guide rod (5) by an external injection molding press, so that the upper mold core (10) covers the top of the lower mold core (11); S3: The external injection molding press pumps the plastic medium through the injection nozzle (20), and the plastic medium flows into the branch flow channel groove (23) through the main flow channel groove (22). The plastic medium in the branch flow channel groove (23) flows to both sides into the rope groove (17) and flows into the connecting piece (18); S4: External cooling water is injected into the upper mold core (10) and the lower mold core (11) through the cooling water injection nozzle A (8) and the cooling water injection nozzle B (9) respectively to cool them; S5: Then the external injection molding press pulls the top plate (1), the top mold (3) and the upper mold core (10) upward along the vertical guide rod (5), and at this time, the pull needle (21) will pull out the residual plastic in the through hole extending downward in the main flow channel groove (22); S6: Finally, the connecting piece (18) and the strip-shaped object (19) connected together can be taken down.

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