TWI852397B - Heat sink temperature control structure - Google Patents

Abstract

The invention at least comprises: a body assembled at a heat flow plate, a heating coil surrounding and adjacent to the outer periphery of the body, a locking piece assembled at the other end of the body, and a material guide cylinder located between the body and the locking piece; the body at least comprises a base assembled at the heat flow plate, a convex rod section extending axially outward from the base, an axial hole penetrating the base and extending to the inner part of the convex rod section, a connecting A groove located at one end of the axial hole, a threaded portion located adjacent to one side of the inner wall edge of the groove and extending axially toward the other end surface of the convex rod section, and at least one or more heat conducting units located at the outer periphery of the convex rod section and protruding radially toward the convex rod section; and the convex rod section, the heat conducting unit and the heating coil are simultaneously accommodated in a cavity of a support plate, and one end of the heat conducting unit can be adjacent to the wall of the cavity.

Description

Heat sink temperature control structure

The present invention relates to a heat sink; in particular, to a heat sink temperature control structure that can make the heat temperature of the hot melt plastic blank located in the front, middle and rear sections of the axial hole of the main body tend to be consistent or close.

The conventional heat channel structure, as shown in FIG. 1, includes: a body 10 having a through-hole 100 and assembled at a heat flux plate 25 and accommodated in a cavity 280 of a support plate 28; a valve needle rod 12 that can move back and forth in the axial hole 100 of the body 10; a heating coil 11 surrounding the outer periphery of the body 10; a locking member 13 assembled at the body 10; and a guide tube 14 sandwiched between the receiving groove 101 of the body 10 and the locking member 13; the body 10 is provided with a through-shaped axial hole 100 in the axial direction, so that the valve needle rod 12 and the hot melt plastic blank P can be accommodated in the axial hole 100 and move, and the other end of the axial hole 100 is connected to form a receiving groove 101, and a threaded portion 102 is formed on the inner wall edge of the receiving groove 101 for the valve needle rod 12 and the hot melt plastic blank P to move. The locking member 13 can be screwed into the threaded portion 102, and can sandwich the seat portion 140 of the guide tube 14 between the receiving groove 101 of the body 10 and the bottom end surface of the locking member 13, so that the axial hole 100 and the internal chamber 142 and the injection hole 143 of the guide tube 14 are coaxially connected; the locking member 13 includes a driving portion 131 for a tool (not shown) to pull , an outer thread 132 extending downward from the driving portion 131 and screwed into the threaded portion 102 of the body 10, an annular portion 133 extending upward from the driving portion 131, an axially arranged mandrel hole 134 for accommodating and limiting the guide tube 14, and an accommodating portion 135 arranged in the annular portion 133 and connected to the mandrel hole 134, the mandrel hole 134 is sleeved The guide tube 14 is limited to the barrel section 141 of the guide tube 14, and one end of the barrel section 141 can protrude outside (or above) the receiving portion 135, and the receiving portion 135 and the barrel section 141 are kept in a non-contact state; and the guide tube 14 is at least composed of a seat 140 sandwiched between the receiving groove 101 of the body 10 and the locking member 13, a seat extending upward from the seat 140 and The barrel section 141 is accommodated in the spindle hole 134 and protrudes outside the accommodation portion 135, an internal chamber 142 is located between the seat 140 and the barrel section 141, and an injection hole 143 passes through the top surface of the barrel section 141 and communicates with the internal chamber 142. In this way, when the end of the valve needle rod 12 is pulled inward by force to the inside of the internal chamber 142 ( When the valve pin 12 is in the retracted state, the injection hole 143 of the guide cylinder 14 can be opened (i.e. not blocked by the valve pin 12), so that the hot melt plastic stock P that has flowed into the axial hole 100 of the body 10 will flow into the inner chamber 142, the injection hole 143 and then into the inner chamber 142 along the guide direction from the outer periphery of the valve pin 12 to the inner wall surface of the inner chamber 142 of the guide cylinder 14. , and then injected into the mold cavity 201 of the mold 20 until the mold cavity 201 is filled; at this time, force will be applied to push the end of the valve needle rod 12 outward (i.e. toward the mold cavity 201 of the mold 20), so that the end of the valve needle rod 12 will be guided along the inner wall surface of the guide cylinder 14 and blocked in the injection hole 143 (as shown in Figure 1), and the output of a plastic injection action can be completed.

Although the above-mentioned creation can achieve the original creation purpose and is highly praised by the industry and general operators, in view of the industry's unremitting research and development and continuous technological innovation and breakthroughs, the applicant has worked harder to research and improve it to make it perfect and practical; in addition, after countless updates of experimental tests and summarizing the feedback from consumers on actual operation and use, the creator found that the following problems still need to be further improved:

In order to allow the hot melt plastic stock P injected into the mold cavity 201 to solidify quickly, a plurality of cooling pipes (not shown) are usually buried around the mold cavity 201, so that the surface temperature of the entire mold 20 is cold or icy. Furthermore, since the support plate 28 and the top surface of the guide tube 14 are respectively in contact with the mold 20, the end of the support plate 28 and the guide tube 14 (including the front end of the internal chamber 142 and the injection hole) adjacent to the mold 20 are 143) will have a more obvious temperature drop (i.e. the temperature at the injection hole 143 will be lower than the original high temperature in the middle or rear section of the shaft hole 100), which makes the hot molten plastic blank P flowing to this place (i.e. the inner chamber 142 close to the injection hole 143) have poor fluidity, and thus makes it difficult to fill the end of the mold cavity 201, so that the defective rate of the blank after cooling is greatly increased, which is a major problem.

As mentioned above, the industry has changed the winding distribution of the heating coil 11 (i.e., the heating coil 11 is tightly wound around the front and rear sections of the body 10, and the heating coil 11 is loosely wound around the middle section of the body 10) to increase the working temperature near the injection hole 143. In this way, although the temperature of the inner chamber 142 close to the mold 20 can be effectively improved to enhance the fluidity of the hot melt plastic blank P, due to the intermittent non-continuous injection manufacturing, the hot melt plastic blank P often has a waiting period between filling the mold 20 and cooling and opening the mold, which can cause the hot melt plastic blank P to be entangled. The heat energy generated by the tightly wound heating coil 11 around the front section of the body 10 will be respectively conducted to the support plate 28, the inner chamber 142 of the guide tube 14 and the middle section of the axial hole 100 of the body 10. In addition, the outer periphery of the body 10 is not in direct contact with the inner wall surface of the cavity 280 of the support plate 28, so that the heat energy in the middle section of the axial hole 100 of the body 10 cannot be directly conducted out, so that the temperature in the middle section of the axial hole 100 is maintained higher, and the surface of the hot melt plastic blank P temporarily staying in the middle section of the axial hole 100 will undergo a qualitative change due to the high temperature, and then produce defective plastic products with annular halo after injection and a significant increase in the defective rate is another major problem.

Therefore, how to develop a device that can make the heat temperature of the hot melt plastic blank in the front, middle and rear sections of the axial hole of the main body consistent or close, and can greatly improve the product yield after injection, is a problem that the industry needs to solve first.

The main content of the heat exchanger temperature control structure of the present invention is to provide a heating coil that is wrapped around the outer periphery of the protruding rod section of the main body and protrudes radially from the outer periphery of the protruding rod section of the main body to form at least one or more heat conduction units. The protruding rod section of the main body and the heating coil can be simultaneously accommodated in the cavity of the support plate, and one end of the heat conduction unit can be adjacent to or close to the wall of the cavity, so that the high temperature at the middle section of the protruding rod section of the main body can be effectively transferred to the support plate through the arrangement of the heat conduction unit. Firstly, it not only increases the heat dissipation area of the body surface, but also enables the high temperature of the middle section of the convex rod section of the body to be directly transferred to the support plate to achieve the effect of rapid heat dissipation and cooling, so that the heating temperature of the front, middle and rear sections inside the axial hole can be consistent or close. At the same time, it can also overcome the deterioration problem of the hot melt plastic blank temporarily staying in the middle section of the axial hole due to high temperature, so as to avoid the phenomenon of producing defective products with annular halo after injection, thereby achieving the improvement of production yield and market competitiveness after injection as its progressive proposition.

In order to achieve the above-mentioned creative purpose, the main technical means of the present invention at least include: a body assembled at a heat flow plate, a heating coil surrounding and adjacent to the outer periphery of the body, a locking piece assembled at the other end of the body, and a material guide cylinder located between the body and the locking piece; wherein: the body has a base assembled at the heat flow plate, a convex rod section extending axially outward from the base, an axial hole penetrating the base and extending inside the convex rod section, a receiving groove connected to one end of the axial hole, and a material guide cylinder located between the body and the locking piece. The inner wall edge of the groove is formed by axially extending toward the other end surface of the convex rod section, and at least one or more heat conducting units are formed by radially protruding from the outer periphery of the convex rod section; the locking part includes a driving part for tool operation, an outer thread extending downward from the driving part and screwed into the threaded part of the main body, a surrounding part extending upward from the pulling part, and an axially arranged mandrel hole for accommodating and limiting the guide tube; the guide tube includes a receiving groove located in the main body or clamped in the main body. The invention relates to a seat portion between the axial hole of the body and the bottom end surface of the locking member, a barrel section formed by protruding upward from the seat portion, an internal chamber formed between the seat portion and the barrel section, and a material injection hole penetrating the top surface of the barrel section and connected to the internal chamber; the axial hole is used for a valve needle rod and the hot melt plastic blank to be accommodated and moved therein, and the groove is used for accommodating the seat portion of the guide barrel, and the groove can be connected with the internal chamber of the guide barrel, so that the valve needle rod is accommodated in the axial hole of the body and the internal chamber of the guide barrel. When the valve moves back and forth in the chamber and the injection hole, under normal conditions, the end of the valve needle rod will be blocked in the injection hole of the guide tube to form a closed state; in addition, the convex rod section and the heat conduction unit are simultaneously accommodated in a cavity of a support plate, so that one end of the heat conduction unit can contact (or be close to) the wall of the cavity, so that the high temperature in the middle section of the axial hole can be effectively guided to the support plate through the heat conduction of the heat conduction unit, and it can be ensured that the heating temperature of the front, middle and rear sections inside the axial hole can be consistent or close.

[Use]

10: Body

100: shaft hole

101: Container

102: Threaded part

11: Heating coil

12: Valve needle rod

13: Locking parts

131: Drive Department

132: External thread

133: Surrounding part

134: spindle hole

135: Accommodation section

14: Material guide cylinder

140: Seat

141: Barrel section

142: Inner room

143: injection hole

20: Mould

201: Mold cavity

25: Heat flux plate

28: Support plate

280: Cavity

P: Hot melt plastic blank

[The present invention]

40: Heat flux plate

45: Support plate

450: Cavity

49: Mould

490: Injection port

491:Mold cavity

5: Body

50: Base

51: convex rod section

52: Axial hole

53: Container

54: Threaded part

55: Ring groove

55a: Tight ring section

55b: Relaxing loop section

56: Heat conduction unit

58: Heating coil

6: Valve needle rod

7: Locking parts

71: Drive Department

72: External thread

73: Surrounding part

74: spindle hole

8: Material guide barrel

80: Seat

81: Barrel section

82:Inner room

83: injection hole

A:Hot melt plastic blank

Figure 1 is a schematic diagram of the partial assembly cross section of the conventional heat-gathering channel structure in application.

Figure 2 is a three-dimensional exploded schematic diagram of the present invention.

Figure 3 is a schematic diagram of the combined cross-section of Figure 2 when it is applied.

Figure 4 is an enlarged schematic diagram of the partial combined section of Figure 3.

Figure 5 is an enlarged schematic diagram of a partial assembly cross section of the second embodiment of the present invention.

Figure 6 is an enlarged schematic diagram of a partial assembly cross section of the third embodiment of the present invention.

The present invention is related to a hot-water channel temperature control structure, as shown in Figures 2 to 4, which at least includes: a body 5 assembled at a hot-water plate 40, a heating coil 58 surrounding the outer periphery of a protruding rod section 51 adjacent to the body 5, a locking member 7 assembled at the other end of the body 5, and a guide tube 8 sandwiched by the locking member 7 and located at the receiving groove 53 of the body 5; wherein:

The body 5 at least comprises a base 50 mounted on the heat flux plate 40, a convex rod section 51 extending axially outward from the base 50, an axial hole 52 penetrating the base 50 and extending inside the convex rod section 51, a groove 53 connected to one end of the axial hole 52, and a groove 53 adjacent to the inner wall edge of the groove 53 and extending toward the other end of the convex rod section 51. The threaded portion 54 is formed by axially extending the surface of the cam section 51, at least one or more heat conducting units 56 are formed by radially protruding from the outer periphery of the cam section 51, and a deformed spiral annular groove 55 is surrounded by the outer periphery of the cam section 51 and is used to place the heating coil 58; the outer thread 72 of the locking member 7 is screwed and locked to the threaded portion 54, so that the material guide can be The seat 80 of the cylinder 8 is contained and limited in the groove 53 (i.e., sandwiched between the groove 53 and the bottom end surface of the locking member 7), and the axial hole 52 is connected to the inner chamber 82 of the guide cylinder 8 in a coaxial manner, so that a valve needle rod 6 and the hot melt plastic blank A can be contained in the axial hole 52 and the inner chamber 82 and move; and the annular groove 55 surrounds the convex The front and rear sections of the rod section 51 are respectively formed as tight ring sections 55a, and the annular groove 55 is formed as a loose ring section 55b in the middle section surrounding the convex rod section 51, so that the annular groove 55 is arranged in a deformed spiral shape by connecting two tight ring sections 55a to a loose ring section 55b, and the heat conducting unit 56 is only located in the two tight ring sections of the annular groove 55. 55a (i.e., the front and rear sections of the convex rod section 51) or the convex rod section 51 located at the relaxed surrounding section 55b of the annular groove 55; in addition, the heating coil 58 and the heat conducting unit 56 located at the convex rod section 51 are simultaneously accommodated in a cavity 450 of a support plate 45, so that one end of the heat conducting unit 56 can contact (or be close to) The wall of the cavity 450 can effectively transfer the accumulated high temperature in the middle section of the axial hole 52 to the support plate 45 through the heat conduction of the heat conducting unit 56 for heat dissipation, so that the heat temperatures of the front section, middle section and rear section of the axial hole 52 can be consistent or close; the heat conducting unit 56 is integrally formed and combined with the convex rod section. The heat conducting unit 51 is preferably assembled at the outer periphery of the convex rod section 51 by screwing (or locking) or fixed at the outer periphery of the convex rod section 51 by embedding and snapping or fixed at the outer periphery of the convex rod section 51 by tight fitting or assembled at the outer periphery of the convex rod section 51 by elastic buckling or assembled at the outer periphery of the convex rod section 51 by telescopic method, and the heat conducting unit 51 is preferably assembled at the outer periphery of the convex rod section 51 by screwing (or locking) or fixed at the outer periphery of the convex rod section 51 by embedding and snapping or fixed at the outer periphery of the convex rod section 51 by tight fitting or assembled at the outer periphery of the convex rod section 51 by elastic buckling or telescopic method. The outer side surface (square) of 6 has the ability of elastic recovery deformation (or bending deformation), or is a three-dimensional surface with a plurality of planes or a plurality of concave and convex surfaces, so as to increase its heat dissipation area for the best; the outer periphery of the convex rod section 51 mentioned above refers to the convex rod section 51 located between the two tightly surrounding sections 55a of the annular groove 55 or the convex rod section 51 located at the loose surrounding section 55b of the annular groove 55;

One end of the valve needle rod 6 can be accommodated in the axial hole 52 of the body 5 and the internal chamber 82 of the guide tube 8, the injection hole 83 and the injection port 490 of a mold 49 to move back and forth, and under normal conditions, the end of the valve needle rod 6 will be blocked in the injection hole 83 of the guide tube 8 and the injection port 490 of the mold 49 to form a closed state;

The locking member 7 at least comprises a driving portion 71 for a tool (not shown) to pull, an external thread 72 extending downward from the driving portion 71 and screwed into the threaded portion 54 of the body 5, a peripheral portion 73 extending upward from the driving portion 71, and an axially arranged mandrel hole 74 for accommodating and limiting the position of the guide tube 8; the mandrel hole 74 is sleeved and limited at the barrel section 81 of the guide tube 8, and allows part of the barrel section 81 to protrude upward or outward from the mandrel hole 74, and allows the part of the barrel section 81 protruding outward from the mandrel hole 74 to remain in a non-contact state with the peripheral portion 73;

The material guide cylinder 8 at least includes a seat 80 sandwiched between the receiving groove 53 of the body 5 and the bottom end surface of the locking member 7, a barrel section 81 protruding upward from the seat 80, an internal chamber 82 formed between the seat 80 and the barrel section 81, and an injection hole 83 penetrating the top surface of the barrel section 81 and connected to the internal chamber 82; the internal chamber 82 and the injection hole 83 can accommodate the valve needle rod 6 to move back and forth therein and allow the hot melt plastic blank A to flow therein;

When injection molding is to be performed, the end of the valve needle rod 6 is pulled inwardly to the inside of the internal chamber 82 (i.e., in a retracted state), so that the injection hole 83 of the guide tube 8 can be opened (i.e., not blocked by the valve needle rod 6), and the hot melt plastic blank A that has flowed into the axial hole 52 of the body 5 will flow into the internal chamber 82, the injection hole 83, and the injection port 490 of the mold 49 in the guiding direction from the outer periphery of the valve needle rod 6 to the inner wall surface of the internal chamber 82 of the guide tube 8 in sequence, until it continues to fill the mold cavity 491 of the mold 49, and then the end of the valve needle rod 6 will be controlled by the machine to be moved outward. The valve needle rod 6 is pushed upward (i.e., toward the injection port 490 of the mold 49) until the tip of the valve needle rod 6 is guided along the inner wall of the guide tube 8 and enters and blocks the injection hole 83 (as shown in FIG. 4); at this time, the hot melt plastic stock A injected into the mold cavity 491 of the mold 49 is affected by a plurality of cooling pipes (not shown in the figure) located around the mold cavity 491, and the mold 4 begins to absorb heat and cool down, until the hot melt plastic stock A cools down to a predetermined temperature, the mold 49 can be opened and taken out; however, the waiting stop period formed from the hot melt plastic stock A filling the mold cavity 491 to the cooling and mold opening and taking out is The hot melt plastic blank A in the axial hole 52 of the body 5 will also be temporarily retained there for the same period of time. At this time, since the heat conducting unit 56 is located at the convex rod section 51 between the two tightly surrounding sections 55a (i.e., the front section and the rear section of the convex rod section 51) of the annular groove 55 of the body 5 or at the convex rod section 51 of the loose surrounding section 55b of the annular groove 55, and after the heat conducting unit 56 is placed in the cavity 450 of the carrier plate 45, one end of the heat conducting unit 56 can contact (or be close to) the wall of the cavity 450. In this way, the accumulated heat in the middle section of the axial hole 52 of the body 5 can be The accumulated heat can be directly and effectively transferred to the support plate 45 through the heat conducting unit 56 for heat dissipation, so that the temperature of the middle section of the axial hole 52 of the body 5 can be timely cooled down, so that the heating temperatures of the front section, middle section and rear section of the axial hole 52 can be consistent or close, and the hot melt plastic blank A located at the front section, middle section or rear section of the axial hole 52 can be ensured to maintain a temperature close to the same, and the hot melt plastic blank A temporarily staying in the middle section of the axial hole 52 can be overcome. The problem of deterioration caused by high temperature can be overcome, and thus it can be achieved to avoid the production of defective products with annular halo after the next injection.

The present invention, through the above-mentioned structure, utilizes the convex rod section 51 of the main body 5 and the heating coil 58 that has been wrapped around the outer periphery of the convex rod section 51 to be simultaneously accommodated in the cavity 450 located in the support plate 45, so that one end of the heat conducting unit 56 can be adjacent to (or close to) the wall surface of the cavity 450, so that the high temperature already located in the middle section of the inner part of the axial hole 52 can be effectively dissipated by the arrangement of the heat conducting unit 56 (i.e., increasing the surface heat dissipation area of the main body 5) to the heat energy. The heat of the hot melt plastic blank A located in the front, middle and rear sections of the axial hole 52 is conducted to the support plate 45 for heat dissipation and cooling, so that the heat temperature borne by the hot melt plastic blank A located in the front, middle and rear sections of the axial hole 52 can be consistent or close, and the problem of deterioration of the hot melt plastic blank A temporarily staying in the middle section of the axial hole 52 due to high temperature can be effectively overcome, and defective products with annular halo can be avoided after the next injection, thereby greatly improving the yield rate and market competitiveness after injection.

Please refer to FIG. 5, which is a second embodiment of the present invention. The main changes are: the original heat conducting unit 56 is integrated with the outer periphery of the convex rod section 51 of the body 5, and is changed to the heat conducting unit 56 being tightly embedded and fixed at the outer periphery of the convex rod section 51 in the form of a thin sheet, and the outer side surface (square) of the heat conducting unit 56 has the ability of elastic recovery deformation (or bending deformation). Therefore, when the heating coil 58 and the thin sheet heat conducting unit 56 located at the convex rod section 51 are simultaneously accommodated in the cavity 450 of a support plate 45, the end of the thin sheet heat conducting unit 56 can be restricted by the cavity 450 and bend and deform to ensure that the end of the thin sheet heat conducting unit 56 can contact the inner wall surface of the cavity 450. In this way, the accumulated heat on the axis can be The accumulated high heat temperature in the middle of the axial hole 52 can be effectively transferred from the middle of the axial hole 52 to the support plate 45 through the heat conduction of the heat conducting unit 56 for heat dissipation, so that the heating temperatures of the front section, the middle section, and the rear section of the axial hole 52 can be consistent or close, and the deterioration of the hot melt plastic blank A that temporarily stays in the middle of the axial hole 52 due to high temperature can be effectively overcome. The problem can be solved and defective products with annular halo can be avoided after the next injection, thereby greatly improving the yield rate and market competitiveness after injection. As for the above-mentioned heat flux plate 40, the support plate 45, the main body 5, the heating coil 58, the valve needle rod 6, the locking part 7, and the guide cylinder 8, their relative arrangement relationship and functions, they have been described in detail in the above content, so they will not be repeated here.

Please refer to FIG. 6, which is a third embodiment of the present invention. The main changes are: the original heat conducting unit 56 is integrated with the outer periphery of the convex rod section 51 of the body 5, and is changed to the heat conducting unit 56 being assembled at the outer periphery of the convex rod section 51 in an elastic snap-fit manner (that is, at least one or more holes, grooves, or annular grooves are provided at the outer periphery), and the outer side surface (square) of the heat conducting unit 56 has a plurality of planes, so as to In order to increase the heat dissipation area, the heat conducting unit 56 is preferably a C-shaped buckle ring, an E-shaped buckle ring, or a combination of an elastic member and a heat conducting member (such as a ball, a metal rod, etc.); therefore, when the heating coil 58 and the heat conducting unit 56 located at the convex rod section 51 are simultaneously accommodated in a cavity 450 located in a support plate 45, the end of the heat conducting unit 56 is restricted by the cavity 450, forcing the heat conducting unit 56 to shrink inwards, so as to ensure that the heat conducting unit 56 is not too large. The end of the heat conducting unit 56 can contact the inner wall surface of the cavity 450, so that the accumulated high temperature in the middle section of the axial hole 52 can be effectively transferred from the middle section of the axial hole 52 to the support plate 45 through the heat conduction of the heat conducting unit 56 to dissipate heat, so that the heat temperatures of the front section, middle section, and rear section of the axial hole 52 can be consistent or close, and the heat can be effectively overcome by staying in the middle section of the axial hole 52 for a short time. The hot melt plastic blank A at the location can be deteriorated due to high temperature, and defective products with annular halo will be avoided after the next injection, thereby greatly improving the yield rate and market competitiveness after injection; as for the above-mentioned heat flow plate 40, the support plate 45, the body 5, the heating coil 58, the valve needle rod 6, the locking part 7, and the guide cylinder 8 and their relative arrangement relationship and functions, they have been described in detail in the above content, so they will not be repeated here.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention; therefore, all equivalent changes or modifications based on the features and spirit described in the scope of the present invention should be included in the scope of the patent application of the present invention.

5: Body

50: Base

51: convex rod section

52: Axial hole

53: Container

54: Threaded part

55: Ring groove

55a: Tight ring section

55b: Relaxing loop section

56: Heat conduction unit

58: Heating coil

7: Locking parts

71: Drive Department

72: External thread

73: Surrounding part

74: spindle hole

8: Material guide barrel

80: Seat

81: Barrel section

83: injection hole

Claims (10)

A hot-dip galvanizing temperature control structure, which at least includes: a body assembled at a hot-dip galvanometer, a heating coil surrounding the outer periphery of a convex rod section adjacent to the body, a locking piece assembled at the other end of the body, and a material guide cylinder located between the body and the locking piece; wherein: The main body at least comprises a base assembled at the heat flux plate, a convex rod section extending axially outward from the base, an axial hole penetrating the interior of the convex rod section, a groove connected to one end of the axial hole, a threaded portion extending outward adjacent to one side of the inner wall edge of the groove, and at least one or more heat conduction units located around the convex rod section and protruding radially toward the convex rod section; the convex rod section and the heat conduction unit are accommodated in a cavity of a support plate; By means of the above structure, the heat conducting unit of the convex rod section of the main body and the heating coil which has been wrapped around the outer periphery of the convex rod section can be simultaneously accommodated in the cavity of the support plate, so that one end of the heat conducting unit can be adjacent to or close to the wall of the cavity, so that the higher temperature accumulated in the middle section of the axial hole can be effectively transferred and dissipated to the axial hole through the arrangement of the heat conducting unit (i.e., increasing the surface heat dissipation area of the main body). The support plate is sufficient to make the heat temperature of the hot melt plastic blank located in the front, middle and rear sections of the axial hole consistent or close, and can overcome the deterioration problem of the hot melt plastic blank temporarily staying in the middle section of the axial hole due to high temperature, so as to avoid the phenomenon of defective products with annular halo produced after injection molding, thereby greatly improving the production yield and market competitiveness after injection. The heat sink temperature control structure as described in claim 1, wherein the heat conducting unit is integrally formed and integrated with the outer periphery of the protruding rod section. The heat-gathering channel temperature control structure as described in claim 1, wherein the heat-conducting unit is assembled around the outer periphery of the convex rod section by screwing or locking. The heat sink temperature control structure as described in claim 1, wherein the heat conducting unit is fixed to the outer periphery of the protruding rod section in a tight fit. The heat sink temperature control structure as described in claim 1, wherein the heat conducting unit is assembled around the outer periphery of the convex rod section in an elastically snap-fit manner. The heat sink temperature control structure as described in claim 1, wherein the heat conducting unit is telescopically arranged around the outer periphery of the convex rod section. A heat-gating channel temperature control structure as described in any one of claim items 1 to 6, wherein an annular groove is additionally formed around the outer periphery of the protruding rod section so that the heating coil can be placed and limited in the annular groove. The heat sink temperature control structure as described in claim 7, wherein the annular groove is a tight surrounding section at the front section and the rear section surrounding the convex rod section, and the annular groove is a loose surrounding section at the middle section surrounding the convex rod section, so that the annular groove is arranged in a deformed spiral shape by connecting two tight surrounding sections to a loose surrounding section, and the heat conduction unit is only located at the convex rod section between the two tight surrounding sections of the annular groove or at the convex rod section of the loose surrounding section of the annular groove. The heat sink temperature control structure as described in claim 8, wherein the outer surface of the heat conducting unit has a plurality of planes to increase its heat dissipation area. The heat sink temperature control structure as described in claim 8, wherein the outer side of the heat conducting unit has the ability to elastically recover deformation or bend deformation.

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