Bolt mold with slotting threads

Abstract

The utility model discloses a bolt mold with slotting threads, and belongs to the technical field of bolt molds. The bolt mold with the slotting threads comprises mold frames, the number of the mold frames is two, mold cores which are oppositely arranged are arranged in the middles of the two mold frames, each mold core is provided with a threaded rod groove, an ejection piece is arranged at the position, located at the threaded rod groove, of each mold core, each ejection piece comprises a filler block, and each filler block and the corresponding threaded rod groove are combined to form a threaded cavity. By optimizing the overall structure, a threaded rod groove is in a semi-cylindrical shape, threaded inclined grooves are formed in the threaded rod groove at equal intervals in the axial direction, the threaded rod groove is equally divided into a front part and a rear part through a filler block, a continuous threaded groove is formed in the end face, forming a cavity, of the filler block and the threaded rod groove, and the filler block can be combined with the threaded rod groove to form an overall threaded cavity. The injection mold is used for injection molding of a bolt with threads, two-section type demolding is completed, the contact surface during single-time separation is reduced, and the external force needing to be applied to bolt demolding is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt mould technical field more specifically, relate to a bolt mould with slotted thread. BACKGROUND

[0002] The injection mould is a kind of tool for producing plastic product, when producing plastic bolt, screw injection mould will be used, plastic screw is formed by using plastic hot melt injection, has nylon PA66 screw, PP screw, PVC screw PE screw etc., mainly applied to the electronic industry field that the conductivity of screw is required.

[0003] The screw injection mould in prior art is directly injected with thread in actual use, and the thread is complex and has large contact area with the mould, when demoulding, the bolt is damaged or broken due to large-area adhesion, and the thread is not produced during injection, so secondary milling is needed to produce thread, which is low in efficiency, therefore, the bolt mould with slotted thread is provided. UTILITY MODEL CONTENTS

[0004] 1. TECHNICAL SCHEME

[0005] A bolt mould with slotted thread, comprising a mould frame, the mould frame is provided with two, the two mould frames are provided with mould cores in the middle and arranged oppositely, the mould core has a thread rod groove, the mould core is provided with an ejection element at the thread rod groove, the ejection element comprises a pad, the pad and the thread rod groove are combined to form a thread cavity, and the two mould cores are away from each other, and the pad protrudes into the thread cavity.

[0006] Preferably, the ejection element further comprises a main frame, the main frame is fixedly connected with the pad, and the mould core is provided with a mounting cavity at the thread rod groove, and the mounting cavity is used for sliding the main frame.

[0007] Preferably, the mounting cavity penetrates the side wall of the thread rod groove of the mould core, the main frame is provided with a protruding block at the edge, and the protruding block is flush with the mould core when the pad is flush with the thread rod groove.

[0008] Preferably, the mould core is provided with a side plate on the side away from the thread rod groove, the side plate corresponds to the position of the mounting cavity, and a top spring is arranged between the side plate and the ejection element.

[0009] Preferably, the protruding block is provided with two, the two protruding blocks are symmetrically arranged on the two sides of the pad, and the top spring is arranged between the two protruding blocks.

[0010] Preferably, the mould core is provided with a bolt head groove on the side wall, the bolt head groove and the thread rod groove are communicated to form an integral injection cavity, and the mould core is provided with an injection hole at the bolt head groove.

[0011] Preferably, a guide is arranged at the corner between the two mold frames, the guide comprising a guide rod and a guide sleeve, the guide rod being fixedly connected with the lower mold frame, and the guide sleeve being embeddedly fixed in the lower mold frame.

[0012] 2. Beneficial effects:

[0013] 1. By optimizing the overall structure, the thread rod groove adopts a semi-cylindrical shape, and a thread inclined groove is equidistantly arranged along the axial direction, the thread rod groove is equally divided into front and rear parts by the lining block, a continuous thread groove is arranged on the end face of the lining block and the thread rod groove, the lining block and the thread rod groove are combined to form an integral thread cavity for injection molding of a bolt with threads, when the two mold cores are separated, the lining block slides relative to the thread rod groove and protrudes into the thread cavity, thereby completing two-stage demolding, reducing the contact surface during single separation, and reducing the external force required for bolt demolding. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic view of the utility model;

[0015] Figure 2 It is a structure schematic view of the mold closing state of the utility model;

[0016] Figure 3 It is a sectional view of the mold core structure of the utility model;

[0017] Figure 4 It is a split schematic view of the mold core structure of the utility model.

[0018] Explanation of reference numerals in the drawing:

[0019] Mold frame 1; guide 2; mold core 3; bolt head groove 4; thread rod groove 5; ejector 6; main frame 61; protruding block 62; lining block 63; overflow cavity 7; injection hole 8; side plate 9; mounting cavity 10; top spring 11. DETAILED DESCRIPTION

[0020] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0021] The embodiment provides a bolt mold with slotted threads, referring to Figures 1-4, including the die frame 1, the die frame 1 is cast with metal, adopts the rectangular shape, and has a middle hole, which can be used to install the mold core 3, wherein the die frame 1 is provided with two, and the two die frames 1 are consistent in size and arranged vertically, at this time, the two die frames 1 are provided with the mold core 3 arranged oppositely in the middle part, the mold core 3 is installed in the middle hole, and the upper and lower two mold cores 3 can form an injection cavity, specifically, the mold core 3 has a threaded rod groove 5, the threaded rod groove 5 adopts a semi-cylindrical shape, and is provided with a threaded inclined groove equidistantly along the axial direction, when the two mold cores 3 are combined together, the other threaded rod groove 5 can form a cylindrical cavity, and has a continuous thread groove, and the thread of the bolt rod can be directly injection molded on the circumferential side wall of the bolt rod, thereby improving the production efficiency of the plastic bolt, and the mold core 3 is provided with an ejection element 6 at the threaded rod groove 5, the ejection element 6 is slidingly installed in the mold core 3, the ejection element 6 includes a pad 63, the pad 63 equally divides the threaded rod groove 5 into two parts, and the pad 63 and the threaded rod groove 5 form an end face of the cavity and are provided with a continuous thread groove, so that the thread groove of the injection molded bolt is integral, and in use, the two mold cores 3 are pressed towards each other, at this time, the pad 63 will be combined with the threaded rod groove 5 to form an integral thread cavity for injection molding of the bolt with threads, when the two mold cores 3 are separated, the pad 63 will slide relative to the threaded rod groove 5 and protrude into the thread cavity, at this time, the pad 63 can separate the solidified bolt from the threaded rod groove 5, and then separate the bolt from the pad 63, thereby completing the two-stage demolding, reducing the contact area during single separation, and reducing the external force required for bolt demolding.

[0022] Referring to Figure 2 , the guide elements 2 are arranged at the corners between the two die frames 1, the guide elements 2 are provided with four, and are installed at the four corner positions of the die frame 1, can be guided, at the same time, the guide elements 2 include a guide rod and a guide sleeve, wherein the guide rod is fixedly connected with the lower die frame 1, and the guide sleeve is embedded and fixed in the lower die frame 1, the lower die frame 1 is fixed on the external base, and the lower die frame 1 can be connected with the external telescopic cylinder, so that the two die frames 1 can be close to or away from each other, and the automatic mold opening and closing operation can be realized.

[0023] Referring to Figure 3 , in order to further optimize the stability of demolding, two ejection elements 6 can be arranged side by side, the two ejection elements 6 cover the entire threaded rod groove 5, and during demolding, the two ejection elements 6 can work independently, when the bolt is ejected from the threaded rod groove 5, the contact area between the bolt and the ejection element 6 is large, thereby avoiding deformation of the bolt caused by extrusion of the pad 63 during demolding, and the two pads 63 can be demolded respectively, that is, three-stage demolding can be realized, which can further avoid damage to the thread during demolding.

[0024] Referring to Figure 4, the ejection 6 still includes the main frame 61, the main frame 61 adopts the "mountain" type frame, the mold core 3 is located at the threaded rod groove 5 and is provided with the installation cavity 10 for the sliding of the main frame 61, during installation, the main frame 61 is vertically and slidingly arranged in the installation cavity 10, the main frame 61 can slide up and down, and the main frame 61 is fixedly connected with the pad 63, the main frame 61 can provide driving force for the up and down sliding of the pad 63, so as to realize the up and down movement of the pad 63 and perform ejection demolding.

[0025] With reference to Figure 4 , first, the installation cavity 10 penetrates the side wall at the threaded rod groove 5 of the mold core 3, second, the main frame 61 is provided with the protrusion 62 at the edge, in the closed mold state, the protrusions 62 symmetrically arranged above and below are pressed against each other, at this time, the mold core 3 is pressed into the installation cavity 10 by the protrusions 62, the protrusions 62 are flush with the mold core 3, and at the same time, the pad 63 is flush with the threaded rod groove 5, in the open mold state, the mold core 3 moves away from each other, at this time, the protrusions 62 move away from each other and are not pressed against each other, the protrusions 62 reset, so that the pad 63 can be pushed into the threaded rod groove 5 and the ejection driving is completed.

[0026] With reference to Figure 4 , when the protrusions 62 are not pressed, the pad 63 can smoothly enter the threaded rod groove 5, the side plate 9 is arranged on the side of the mold core 3 away from the threaded rod groove 5, the side plate 9 corresponds to the position of the installation cavity 10, the top spring 11 is arranged between the side plate 9 and the ejection 6, when the protrusions 62 are not pressed, the elastic force of the top spring 11 can make the protrusions 62 protrude from the mold core 3 to avoid, when the protrusions 62 are pressed, the top spring 11 is pressed and stores force, and when the protrusions 62 are relaxed later, the ejection demolding can be completed, in order to ensure the stable use of the top spring 11, the side plate 9 can be opened regularly, the side plate 9 is connected with the mold core 3 by bolts and can be quickly disassembled, so that the maintenance and replacement of the top spring 11 can be performed, and the elastic force of the top spring 11 can smoothly complete the demolding ejection action.

[0027] With reference to Figure 3 and Figure 4 , the protrusions 62 are provided with two, the protrusions 62 are arranged on the front and back sides of the pad 63, and the two protrusions 62 are symmetrically arranged on the two sides of the pad 63, so that the contact can be performed from both sides, the vertical up and down sliding of the pad 63 can be ensured, and at the same time, the top spring 11 is arranged between the two protrusions 62, so that when the protrusions 62 are pressed against each other, the top spring 11 can be uniformly pressed, and the uneven force of the top spring 11 can be avoided to cause the eccentric wear of the protrusions 62.

[0028] With reference to Figure 4The bolt head groove 4 and the threaded rod groove 5 are communicated to form an integral injection cavity, so that the bolt with the bolt head can be directly formed after injection, and the bolt head groove 4 can be self-premanufactured type to produce different shaped bolt heads, specifically, two mold cores 3 can be separately produced and combined to form an integral large mold core 3, different bolt head grooves 4 and threaded rod grooves 5 can be combined to improve the utilization rate of the mold core 3, and the injection hole 8 is arranged at the bolt head groove 4 of the mold core 3, the injection hole 8 can be arranged at a position with less surface change to ensure that the injection residual material is more convenient to remove after injection and the more precise threaded part is not damaged.

[0029] Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only preferred examples of the utility model and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A die for bolts with grooved thread comprising a die holder (1), characterized in that: The mold frame (1) is provided with two, two said mold frame (1) middle part is provided with the mold core (3) opposite, the mold core (3) has the threaded rod groove (5), the mold core (3) is located at threaded rod groove (5) is provided with the ejector (6), the ejector (6) includes pad (63), the pad (63) is combined with threaded rod groove (5) to form a threaded cavity, two said mold core (3) away from each other when pad (63) protrudes into the threaded cavity.

2. A die for a slotted thread bolt according to claim 1, characterized in that: The ejector (6) further comprises a main frame (61), the main frame (61) is fixedly connected with the pad (63), the mold core (3) is provided with an installation cavity (10) for the main frame (61) to slide at the threaded rod groove (5).

3. A die for a slotted thread bolt according to claim 2, characterized in that: The installation cavity (10) is provided with a side wall at the threaded rod groove (5) of the mold core (3), the main frame (61) is provided with a protrusion (62) at the edge, and the protrusion (62) is flush with the mold core (3) when the pad (63) is flush with the threaded rod groove (5).

4. A die for threading a bolt with a grooved thread as defined in claim 3, characterized in that: The mold core (3) is provided with a side plate (9) away from the threaded rod groove (5) side, the side plate (9) corresponds to the installation cavity (10), the side plate (9) and the ejector (6) are provided with a top spring (11).

5. A die for threading a bolt with a grooved thread as defined in claim 4, characterized in that: The protrusion (62) is provided with two, two said protrusion (62) symmetrically arranged on both sides of the pad (63), and the top spring (11) is arranged between the two protrusions (62).

6. A die for threading a bolt with a grooved thread as defined in claim 5, characterized in that: The mold core (3) is provided with a bolt head groove (4), the bolt head groove (4) and the threaded rod groove (5) are communicated to form an integral injection cavity, and the mold core (3) is provided with an injection hole (8) at the bolt head groove (4).

7. A die for threading a bolt with a grooved thread as defined in claim 6 wherein: Two said mold frame (1) between the corner is provided with a guide (2), the guide (2) includes a guide rod and a guide sleeve, the guide rod is fixedly connected with the lower mold frame (1), and the guide sleeve is embedded and fixed in the lower mold frame (1).

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